JP4624492B2 - Pile driver with working device - Google Patents

Description

  The present invention relates to a pile driving machine with a working device in which a working device is mounted on a leader. A pile driver with a working device that gives pressure input to it.

  In foundation work for constructing support piles, for example, when a casing is rotationally press-fitted into the ground or when the ground is excavated with a screw rod, a working device such as an auger is attached to the leader of the pile driver so as to be able to move up and down. The casing, screw rod, and the like attached to such an auger are rotated by the auger to excavate the ground, and further, the rotary auger pressed against the ground is performed as the auger descends along the leader along with the rotation. Conventionally, in such a pile driving machine with a working device, a casing and a screw rod are forcedly pushed through the working device, and the following configuration has been adopted.

  FIG. 9 is a conceptual diagram showing a conventional pile driving machine with a working device provided with a forced pushing mechanism using a winch. In the pile driving machine 100 with a working device, two winches 102 and 103 are provided on a main body 101, and a suspension wire 111 fed from one winch 102 is hung on a suspension sheave 151 of an auger 150 via a top sheave 104. Has been. The press-fitting wire 112 sent out from the other winch 103 is hung on the narrowing sheave 152 of the auger 150 through the press-fitting sheave 105. Therefore, the auger 150, which is a work device attached to the reader 106, winds up the winch 103 simultaneously with the lowering of the winch 102, thereby generating a pressure input due to the downward pulling force of the winch 103, and causing the screw rod 130 to move. It can be forced into the ground.

FIG. 10 is a conceptual diagram showing a conventional pile driving machine with a working device provided with a lifting device that moves up and down according to a rack provided in the leader. In the pile driving machine 200, a rack 202 is fixed to the front surface of a leader 201, and an elevating device 255 provided integrally with an auger 250 is provided. The elevating device 255 has a pinion gear 251 that meshes with the rack 202, and the pinion gear 251 is rotated by the hydraulic motor 252 so that the elevating device 255 can be moved up and down along the leader 201. Therefore, the pinion gear 251 rolls on the rack 202 by the drive of the hydraulic motor 252, and the integral auger 250 and screw rod 230 move up and down. And the screw rod 230 can be forcedly press-fitted with respect to the ground by the pressure input which the raising / lowering device 255 descends.
JP 2001-182061 A (second page, FIG. 1) Japanese Examined Patent Publication No. 6-78617 (2nd page, FIGS. 1 and 4)

  However, each pile driver with a working device of such a forced pushing mechanism has the following problems. First, in the pile driving machine 100 adopting the forced press-fitting by the winch shown in FIG. 9, the wires 111 and 112 of the winches 102 and 103 must be hung on the sheaves 151 and 152 from the up and down direction of the auger 150. It was very time consuming. Further, since the space between the leader 106 where the narrowing sheave 152 is located and the screw rod 130 is narrow, a plurality of sheaves cannot be stacked in the axial direction. For this reason, since the number of wires 112 that generate pressure input is small, the narrowing load cannot be increased in consideration of the strength of the wire 112, and a large pressure input cannot be obtained. Further, the winding and lowering of the wires 111 and 112 must be performed at the same time. However, the operation for preventing the wires 111 and 112 from being particularly distorted is very complicated.

  On the other hand, in the pile driving machine 200 employing the rack and pinion elevator shown in FIG. 10, the pinion gear 251 is rotated by the hydraulic motor 252, and the meshed rack 202 is rolled and lowered to generate pressure input. In such a mechanism, the rack 202 and the pinion gear 251 are worn due to long-term use, and malfunction occurs. For this reason, the number of replacements is relatively large and the cost is high. Further, since the distance between the meshing position of the rack 202 and the pinion gear 251 and the screw rod 230 is large, a moment acts on the entire auger 250 by the reaction force acting on the screw rod 230. As a result, a load is applied to the sliding portion between the guide gib 253 and the guide pipe 203, resulting in uneven wear, which requires replacement over a long period of use, which also increases costs.

  Therefore, an object of the present invention is to provide a low-cost pile driving machine with a working device that is easy to handle in order to solve such a problem.

  The pile driving machine with a working device according to the present invention hangs a working device slidably mounted on a leader standing in front of the main body with a suspension wire, and operates by lifting and lowering the suspension wire with a winch. A working rod connected to the device is moved up and down while rotating to perform a predetermined work, and the working device is press-fitted with a positioning device that is slidably mounted on the reader above the working rod A positioning mechanism is provided, which is connected by a cylinder, and is provided between the positioning device and the reader so as to stop the positioning device from moving at an arbitrary height of the reader.

In the pile driving machine with a working device according to the present invention, it is preferable that the press-fit cylinder is a pair of hydraulic cylinders and is disposed at a position sandwiching a working rod connected to the working device.
Further, the pile driving machine with a working device according to the present invention may be provided with a positioning mechanism between the working device and the leader so as to stop the working device so that the working device cannot be moved at an arbitrary height of the leader. preferable.
In the pile driving machine with a working device according to the present invention, the positioning mechanism includes a rack formed on the leader, and the positioning device or / and the working device meshes with a pinion gear with respect to the rack. It is preferable that a lock means for stopping the rotation of is provided.

Further, in the pile driving machine with a working device according to the present invention, the locking means includes a locking disk provided integrally with a rotation shaft of the pinion gear, and a rotation stop plate that contacts the locking disk and restricts rotation. It is preferable that the rotation stop plate is in contact with the locking disk by the urging force of the urging member and is separated from the urging force by hydraulic pressure.
In the pile driving machine with a working device according to the present invention, the positioning mechanism, the reader is provided with a disk plate, and the positioning device and / or the working device is opened and closed by a hydraulic chuck cylinder. It is preferable that a chuck to be stopped is provided, and the chuck is stopped by the frictional force of sandwiching the disk plate by the chuck.

According to the pile driving machine with the working device of the present invention, for example, when the screw rod hits a hard ground at the time of rotational press-fitting of the screw rod, the positioning device is locked and positioned with respect to the leader, and the press-fitting cylinder is extended. The work device and the screw rod are pushed down by the pressure input to forcibly press into the ground.
Therefore, in the present invention, since the working device and the positioning device are integrally formed by the press-fitting cylinder, it is easy to mount on the reader and easy to handle, and the press-fitting cylinder generates pressure input. As with a rack and pinion, it is possible to reduce parts replacement costs due to wear. Furthermore, because the press-fit cylinder that generates pressure input and pull-out force and the work rod that receives the reaction force during press-fitting, etc. are arranged side by side, the moment does not act on the work device, resulting in an eccentric load. Wear of the sliding part can be suppressed.

Next, an embodiment of a pile driving machine with a working device according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view conceptually showing a pile driving machine with a working device of the present embodiment. And FIG. 2 is the figure which showed the front surface of the pile driving machine with a working device in a different form.
The pile driving machine 1 with a working device is configured by a base machine in which a main body 12 that can turn is provided on a traveling unit 11 that includes a crawler. The main body 12 includes a power unit including a cab and a hydraulic pump on a main frame, and a reader 15 is supported on the front of the main body 12. And this pile driving machine 1 with an operation apparatus is equipped with the auger 20 which is an operation apparatus with respect to the leader 15, In this embodiment, the screw rod 80 is attached to the rotating shaft of the auger 20 according to work. Are connected.

  The leader 15 is provided with guide pipes 16 on the left and right side surfaces of the machine body over almost the entire length, and the auger 20 is provided with guide gibs 21 for gripping and sliding the guide pipes 16 from the left and right. Further, the pile driving machine 1 with the working device is provided with a rack 18 on the front surface of the leader 15, and the auger 20 is integrally provided with a positioning device 23 having a pinion gear 22 that meshes with the rack 18. The positioning device 23 is also provided with guide gibbs 24 for gripping the guide pipe 16 from the left and right. Both the auger 20 and the positioning device 23 slide on the guide pipe 16 by the guide gibbs 21 and 24 and move up and down along the leader 15. It is installed as possible.

  In the pile driving machine 1 with the working device, the suspension wire 10 is sent out from the winch 13 provided in the main body 12 and is hung on the suspension sheave 25 of the positioning device 23 via the top sheave 17 at the tip of the reader 15. Yes. The pile driving machine 1 with the working device of the present embodiment is configured such that the auger 20 and the positioning device 23 are suspended by the suspension wire 10, and the auger 20 and the positioning device 23 are pulled up by winding the winch 13. . That is, the rack 18 and the pinion gear 22 are not provided as lifting means as in the conventional example, but are configured as a positioning mechanism for stopping the rotation of the pinion gear 22 by the lock unit 27 and positioning it at a predetermined height. It is.

  On the other hand, a screw rod 80 is connected to the auger 20 so that it can be forcibly press-fitted. Specifically, the auger 20 and the positioning device 23 arranged vertically along the reader 15 are connected by a pair of left and right press-fitting cylinders 26, and the vertical interval thereof is displaced. That is, the press-fitting cylinder 26 is expanded and contracted with respect to the positioning device 23 positioned at a predetermined height of the reader 15, so that a pressure input or a pulling force is applied to the screw rod 80 via the auger 20. Such a press-fit cylinder 26 is a backward hydraulic cylinder, and is attached in parallel to a position sandwiching the screw rod 80.

The positioning device 23 has a pair of pinion gears 22 and meshes with a rack 18 of both teeth fixed to the leader 15. The pinion gears 22 and 22 are pivotally supported by the lock unit 27, respectively. Here, FIG. 3 is a diagram showing a hydraulic circuit in which the lock unit 27 and the winch 13 can be operated with one operation lever.
First, in the lock unit 27, a lock disk 32 is fixed to the rotation shaft 31 of the pinion gear 22, and a rotation stop plate 33 is provided for the lock disk 32. The anti-rotation plate 33 is stopped by the locking disk 32 being pressed by the urging force of the spring 34, and is separated from the locking disk 32 against the urging of the spring 34 by the pressure from the opposite side, and the lock is released. It has come to be.

In the present embodiment, it is necessary to interlock the locking operation of the positioning mechanism and the feeding operation by the winch 13, but in the hydraulic circuit shown in FIG.
The remote control valve 41 is configured to perform the switching operation of each pair of switching valves 43 and 44 according to the inclination of the operation lever 42. The switching valves 43 and 44 are connected to a pilot pressure hydraulic pump (not shown) for supplying pilot pressure and a tank 45 to switch the control valve 46. The switching valves 43 and 44 are connected to an ascending or descending pilot chamber of the control valve 46. Further, the switching valves 43 and 44 are connected to the pressurizing chamber 35 of the lock unit 27 via the shuttle valve 47.

  The control valve 46 is connected to the hydraulic motor 53 of the winch 13 via a winding line 51, a lowering line 52, and a counter balance valve 55. Further, the control valve 46 is provided with a center bypass line 56 for connecting the hydraulic pump 48 and the tank 45, and a tank line 57 provided with a relief valve 49 is connected.

  Subsequently, in this embodiment, excavation of the ground using the screw rod 80 is performed by the pile driving machine 1 with the working device as follows. At the start of work, the auger 20 and the positioning device 23 are pulled up along the leader 15 by winding up the winch 13, and the screw rod 80 is connected to the rotating shaft of the auger 20. The auger 20 and the positioning device 23 are excavated while the press-fit cylinder 26 is in a contracted state and the two are close to each other. In the excavation by the screw rod 80, the suspension wire 10 is lowered by the winch 13, and the screw rod 80 is rotated by the output from the auger 20, whereby the weight of the auger 20 and the positioning device 23 and the propulsive force of the spiral wings that enter the ground. Excavation is performed.

  As shown in FIG. 3, in the positioning device 23 when the excavation proceeds smoothly, the rotation stop plate 33 is separated from the lock unit 27 by the hydraulic pressure, and the rotation of the pinion gear 22 is in a free state. Accordingly, when the auger 20 descends along the leader 15 along with excavation, the positioning device 23 also descends, so that the free pinion gear 22 rolls on the rack 18.

  On the other hand, forced press-fitting is performed when the screw rod 80 hits the hard ground and does not enter any more. Therefore, when forced press-fitting is performed, the hydraulic pressure is released from the positioning device 23, and the rotation stop plate 33 is pressed against the lock disk 32 by the urging force of the spring 34 to lock the rotation. Since the rotation of the pinion gear 22 is restricted, the positioning device 23 is positioned at a predetermined height with respect to the reader 15 while being engaged with the rack 18. In this state, hydraulic oil is supplied to the press-fitting cylinder 26 in the contracted state shown in FIG. 2A, and is extended in the vertical direction as shown in FIG.

  When the press-fitting cylinder 26 is extended, a force acting in the extending direction is supported by the positioning device 23 and transmitted to the screw rod 80 via the auger 20, and forced press-fitting into the hard ground is performed. In the present embodiment, forced press-fitting is performed by the output from the press-fitting cylinder 26 that expands and contracts by such hydraulic pressure. Since the press-fit cylinder 26 cannot press-fit beyond its stroke, if further press-fit is required, the lock of the positioning device 23 is released and the press-fit cylinder 26 is contracted, and as shown in FIG. In the approached state, it is locked again and the press-fitting cylinder 26 is extended to forcibly press-fit the screw rod 80. Thus, by repeatedly locking and releasing the positioning device 23 and expanding and contracting the press-fitting cylinder 26, press-fitting is performed step by step in multiple steps.

  On the other hand, when pulling out the screw rod 80, the winch 13 is wound up with the positioning device 23 unlocked, and the auger 20 and the positioning device 23 are pulled up by the suspension wire 10. At the time of pulling out, the screw rod 80 is pulled up by the hoisting force of the winch 13, but if that is not sufficient, the rotation of the pinion gear 22 is restricted by the lock unit 27 with the press-fit cylinder 26 extended, and the positioning device 23 is moved. After positioning, the press-fit cylinder 26 is contracted to force the auger 20 and the screw rod 80 to be lifted.

  In the present embodiment, the lock unit 27 of the positioning device 23 and the winch 13 are interlocked and can be operated simultaneously by the operation lever 42. As shown in FIG. 3, when the operation lever 42 is set to the neutral state, the hydraulic oil from the hydraulic pump 48 flows to the tank 45 through the control valve 46. On the other hand, when the operation lever 42 is tilted in the winding direction, the switching valve 43 is switched, and the pilot pressure switches the control valve 46 to the A port block. Therefore, the hydraulic oil from the hydraulic pump 48 flows through the hoist line 51 and rotates the hydraulic motor 53.

  Conversely, when the operating lever 42 is tilted in the lowering direction, the switching valve 44 is switched, and the pilot pressure switches the control valve 46 to the B port block. Therefore, the hydraulic oil from the hydraulic pump 48 flows through the lowering line 52 and rotates the hydraulic motor 53 in the reverse direction. At this time, the counter balance valve 55 is opened by the hydraulic pressure flowing through the lowering line 52, and the returned hydraulic fluid flows through the hoisting line 51 through the counter balance valve 55.

  In this way, when the winch 13 is rotated forward or backward, the suspension wire 5 is wound up or down, and the auger 20 or the positioning device 23 is moved up and down along the leader, the pilot pressure passes through the shuttle valve 47 in either case. Then, it is supplied to the pressurizing chamber 35 of the lock unit 27, and the lock plate 33 is released from the lock disk 32 to release the lock. As shown in FIG. 3, when the operation lever 42 is in the neutral state, the ports of both the switching valves 43 and 44 are switched to the tank 45 side, so that the pressure in the pressurizing chamber 35 is lowered and the lock unit 27 is moved to the spring 34. Will be locked.

  Therefore, according to the pile driving machine 1 with the working device of the present embodiment, since the auger 20 and the positioning device 23 are integrated by the press-fitting cylinder 26, the mounting to the reader 15 is easy. Further, since the winch 13 and the lock unit 27 of the hanging wire 10 are operated simultaneously by one operation by the operation lever 42 by the hydraulic circuit shown in FIG. 3, the operation becomes extremely easy. In addition, since the screw rod 80 is press-fitted into the ground by the press-fitting cylinder 26 and the rack 18 and the pinion gear 22 are used as a positioning mechanism, it is possible to greatly reduce the cost of parts replacement due to wear. Further, since the press-fit cylinder 26 that generates pressure input and pull-out force and the screw rod 80 that receives a reaction force during press-fitting and the like are arranged side by side at the same position, a moment is applied to the auger 20 and the positioning device 23. It does not act and wear of the sliding part due to the eccentric load can be suppressed.

  Next, 2nd Embodiment of the pile driving machine with a working device is described. FIG. 4 is a conceptual diagram illustrating a pile driving machine with a working device according to the second embodiment, and the same components as those in the first embodiment will be described with the same reference numerals. In the pile driving machine 2 with a working device, a lock unit 27 is provided in an auger 20 that is a working device, and the pinion gear 22 meshes with the rack 18 in the same manner as the positioning device 23. Therefore, in the present embodiment, the locking mechanism is provided in each of the auger 20 and the positioning device 23 that are connected up and down by the press-fitting cylinder 26, one of which is positioned with respect to the reader 15, and the scale-insect insect is expanded and contracted by the press-fitting cylinder 26. It is possible to move like.

  Therefore, when excavating the ground with the screw rod 80 connected to the rotating shaft of the auger 20, as in the first embodiment, for example, the positioning device 23 is locked on the hard ground and the press-fit cylinder 26 is extended to extend the screw rod. Push in 80. In order to perform press-fitting by repeatedly expanding and contracting the press-fitting cylinder 26, the press-fitting cylinder 26 is contracted to lower the unlocking positioning device 23, and at that position, the positioning device 23 is locked again to perform press-fitting.

  On the other hand, apart from such work, for example, in the case of ground improvement, the following operation is performed. First, the positioning device 23 is locked, the press-fitting cylinder 26 is extended, the auger 20 is lowered, and the inside of the excavation hole is stirred by the screw rod 80. Then, the press-fit cylinder 80 is contracted, and the auger 20 is positioned at the raised position. That is, the lock unit 27 (see FIG. 3) provided in the auger 20 presses the rotation stop plate 33 against the lock disk 32 by the urging force of the spring 34 and restricts the rotation of the pinion gear 22. As a result, the auger 20 is positioned with respect to the reader 15.

  In this state, if the locking of the positioning device 23 is released and the press-fitting cylinder 26 is extended, the positioning device 23 can be raised by being supported by the auger 20. If the screw rod 80 is placed on a loose ground even if the positioning device 23 is raised while the auger 20 is free, it sinks due to the weight of the auger 20, the positioning device 23 and the screw rod 80. As a result, the exact position of the auger 20 and the like cannot be grasped. Therefore, according to this embodiment, while having the same effect as the pile driving machine 1 with a working device of the first embodiment, it is possible to perform a work like a scale insect in a further rising direction.

Next, 3rd Embodiment of the pile driving machine with a working device is described. FIG. 5: is a conceptual diagram which shows the pile driving machine with a working device of 3rd Embodiment, and attaches | subjects and demonstrates the same code | symbol about the same structure as 1st Embodiment. Moreover, FIG. 6 is the top view which showed notionally the positioning device which comprises the pile driving machine with a working device of 3rd Embodiment.
This pile driving machine 3 with a working device is constituted by a positioning device 60 different from the first embodiment. The positioning device 60 is provided with a chuck 61 on which a pair of bent gripping claws 61 a and 61 a are pivotally supported, and is opened and closed by a hydraulic cylinder (chuck cylinder) 62. On the other hand, not the rack but a disk plate 65 is attached to the entire surface of the reader 15, and the positioning device 60 is arranged so that the tip of the chuck 61 sandwiches the disk plate 65.

  In the pile driving machine 3 with the working device, the auger 20 and the positioning device 60 are connected by the press-fit cylinder 26, and excavation is performed in a state where the press-fit cylinder 26 is contracted. At that time, the suspension wire 10 is unwound by the winch 13. When the excavation is proceeding smoothly, the positioning device 60 is in a non-contact state with the disk plate 65 because the chuck cylinder 62 contracts and the tip of the chuck 61 opens. On the other hand, when forced press-fitting is performed, the chuck cylinder 62 of the positioning device 60 extends, the tip of the chuck 61 closes, the disk plate 65 is firmly gripped from both sides, and is locked by the frictional force.

  Therefore, when hydraulic oil is supplied to the press-fitted cylinder 26 in the contracted state and extended in the vertical direction (see FIG. 2), it is supported by the positioning device 60 positioned by the reader 15, and the force of the press-fit cylinder 26 passes through the auger 20. Is transmitted to the screw rod 80 and forced press-fitting into the hard ground is performed. Forced press-fitting is performed by the output from the press-fitting cylinder 26 that expands and contracts by such hydraulic pressure. Since the press-fit cylinder 26 cannot press-fit beyond its stroke, if further press-fit is required, the positioning device 60 is unlocked, the press-fit cylinder 26 is contracted, and the press-fit cylinder 26 is re-locked in the state of being close to the auger 20 and press-fit The cylinder 26 is extended and the screw rod 80 is forcibly press-fitted. Thus, by repeatedly locking and releasing the positioning device 60 and expanding and contracting the press-fitting cylinder 26, press-fitting is performed step by step in multiple steps.

  On the other hand, when pulling out the screw rod 80, the winch 13 is wound up with the lock of the positioning device 60 released, and the auger 20 and the positioning device 60 are pulled up by the suspension wire 10. When pulling out, the screw rod 80 is pulled up by the hoisting force of the winch 13. However, if this is not sufficient, the disk plate 65 is held by the chuck 61 with the press-fit cylinder 26 extended, and the positioning device 60 is fixed. Then, the press-fit cylinder 26 is contracted and the auger 20 and the screw rod 80 are forcibly pulled up.

  Therefore, according to the pile driving machine 3 with the working device of the present embodiment, since the auger 20 and the positioning device 60 are integrated by the press-fit cylinder 26, the mounting to the reader 15 is easy. Although not shown in detail, if the hydraulic circuit is connected to the chuck cylinder 62 instead of the lock unit 27 shown in FIG. 3, the winch 13 of the suspension wire 10 and the opening and closing of the chuck 61 can be opened and closed by one operation by the operation lever 42. Since it is made to operate simultaneously, operation becomes very easy. Further, since the screw rod 80 is press-fitted into the ground by the press-fitting cylinder 26 and the chuck 61 and the disc plate 65 are used as a positioning mechanism, the structure is easy. Further, since the press-fit cylinder 26 that generates pressure input and pull-out force and the screw rod 80 that receives a reaction force during press-fitting and the like are arranged side by side at the same position, a moment is applied to the auger 20 and the positioning device 23. It does not act and wear of the sliding part due to the eccentric load can be suppressed.

  Next, a fourth embodiment of the pile driving machine with a working device will be described. FIG. 7 is a diagram showing a hydraulic circuit around the lock unit in relation to the pile driving machine with a working device of the fourth embodiment, and FIG. 8 is a diagram showing a hydraulic circuit for operating the press-fitting cylinder. . The same components as those in the first embodiment will be described with the same reference numerals. The lock unit 27 is provided in the positioning device 23 as shown in FIG. 1, and is configured in the same manner as in the first embodiment.

  A hydraulic pump 71 is connected to the pressurizing chamber 35 of the lock unit 27 via a lock solenoid valve 72. The hydraulic pump 71 is connected to the tank 74 through a relief valve 73. The locking solenoid valve 72 includes an A port block and a B port block shown in the figure, and is switched from the A port block to the B port block by energizing the solenoid so that the hydraulic pump 71 and the pressurizing chamber 75 communicate with each other. It has become. A control line 76 is connected to the locking solenoid valve 72 via a joint 75, and a B-contact pressure switch 77 that is opened by hydraulic pressure is provided on the control line 76.

  In the present embodiment, the locking operation of the positioning mechanism and the operation of the press-fit cylinder 26 are interlocked. As shown in FIG. 8, the remote control valve 81 is configured to perform the switching operation of each pair of switching valves 83 and 84 by the inclination of the operation lever 82. The switching valves 83 and 84 are connected to a pilot pressure hydraulic pump (not shown) for supplying pilot pressure and a tank 85 to switch the control valve 86. The switching valves 83 and 84 are connected to the extension side or contraction side pilot chamber of the control valve 86, and the control valve 86 is connected to the press-fitting cylinder 26 via a contraction line 91 and an extension line 92. A center bypass line 93 that connects the hydraulic pump 87 and the tank 85 is formed, and a relief valve 94 is provided in the tank line 95. Further, in the present embodiment, the switching valves 83 and 84 are connected to the pressure switch 77 via the shuttle valve 88.

  Therefore, when the screw rod 80 is forcibly press-fitted or pulled out using the press-fitting cylinder 26, the operation lever 82 is tilted in the extending or contracting direction. When tilted to the extension side, the switching valve 83 is switched, and the pilot pressure switches the control valve 86 to the A port block. Therefore, the hydraulic oil from the hydraulic pump 87 flows through the extension line 92 to extend the press-fitting cylinder 26. Conversely, when the operating lever 82 is tilted in the contracting direction, the switching valve 84 is switched, and the pilot pressure switches the control valve 86 to the B port block. Therefore, the hydraulic oil from the hydraulic pump 87 flows through the contraction line 91 and causes the press-fit cylinder 26 to contract.

  When the press-fitting cylinder 26 expands and contracts in this way, the pilot pressure is applied to the pressure switch 77 via the shuttle valve 88, the B-contact pressure switch 77 shown in FIG. 7 is turned off, and the locking solenoid valve 72 is The power is turned off and the B port block is switched to the A port block shown in the figure. Then, the pressurizing chamber 35 of the lock unit 27 communicates with the tank 74, and the rotation stop plate 33 is pressed against the lock disk 32 by the urging force of the spring 34. Therefore, the rotation of the pinion gear 22 that rolls on the rack 18 is limited. Therefore, in this embodiment, since the lock unit 27 is operated simultaneously by the operation lever 82 that extends and contracts the press-fitting cylinder 26, the operation becomes extremely easy.

As mentioned above, although one Embodiment of the pile driver with a working device concerning this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
In the above-described embodiment, the rack 18 and the pinion gear 22 and the chuck 61 and the disk plate 65 are used as the positioning mechanism. However, other arrangements may be used.

It is the side view which showed notionally 1st Embodiment of the pile driving machine with a working device. It is the figure which showed the front part of the pile driving machine with a working device in a different form. It is the figure which showed the hydraulic circuit which enabled operation of the lock unit and the winch with one operation lever. It is the side view which showed notionally 2nd Embodiment of the pile driving machine with a working device. It is the side view which showed conceptually 3rd Embodiment of the pile driving machine with a working device. It is the top view which showed notionally the positioning device which comprises the pile driving machine with a working device of 3rd Embodiment. It is the figure which showed the hydraulic circuit of the lock unit periphery part regarding 4th Embodiment of the pile driving machine with a working device. It is the figure which showed the hydraulic circuit for operating a press injection cylinder. It is the conceptual diagram which showed the conventional pile driver | operator with a working device provided with the forced pushing mechanism using a winch. It is the conceptual diagram which showed the conventional pile driver | operator with a working device provided with the raising / lowering apparatus which raises / lowers according to the rack provided in the leader.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pile driver 10 with working device Hanging wire 11 Traveling part 12 Main body 13 Winch 15 Leader 18 Rack 20 Auger 22 Pinion gear 23 Positioning device 26 Press-fit cylinder 27 Lock unit 32 Locking disk 33 Stop plate 34 Spring 41 Remote control valve 42 Operation lever 43, 44 Switching valve 46 Control valve 47 Shuttle valve 53 Hydraulic motor 80 Screw rod

Claims (6)

A working device that is slidably attached to a reader standing in front of the main body is suspended by a suspension wire, and the working rod connected to the working device is rotated by winding and lowering the suspension wire by a winch. In a pile driver with a working device that lifts and lowers while giving it,
The working device is connected by a press-fitting cylinder with a positioning device that is slidably mounted on the reader above the working device,
A pile driving machine with a working device, characterized in that a positioning mechanism is provided between the positioning device and the leader so as to stop the positioning device so as not to move at an arbitrary height of the leader. In the pile driver with a working device according to claim 1,
A pile driving machine with a working device, wherein the press-fitting cylinder is a pair of hydraulic cylinders and is disposed at a position sandwiching a working rod connected to the working device. In the pile driver with a working device according to claim 1 or claim 2,
A pile driving machine with a working device, wherein a positioning mechanism is provided between the working device and the leader to stop the working device so that the working device cannot move at an arbitrary height of the leader. In the pile driver with a working device according to any one of claims 1 to 3,
In the positioning mechanism, a rack is formed in the leader, and the positioning device or / and the working device is provided with a lock unit that meshes with the rack and stops the rotation of the pinion gear. A pile driver with a working device. In the pile driver with a working device according to claim 4,
The locking means includes a locking disk provided integrally with the rotation shaft of the pinion gear, and a rotation stop plate that contacts the lock disk and restricts rotation, and the rotation stop plate is a lock disk. A pile driving machine with a working device, wherein the pile driver makes contact with the urging force of the urging member and is separated from the urging force by hydraulic pressure. In the pile driver with a working device according to any one of claims 1 to 3,
In the positioning mechanism, a disk plate is formed on the reader, and the positioning device or / and the working device is provided with a chuck for opening and closing the disk plate with a hydraulic chuck cylinder, and the chucking of the disk plate by the chuck is performed. A pile driving machine with a working device, which is stopped by a frictional force.

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