JP5337511B2 - Emergency escape method for hydraulic work machines - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an emergency escape method for a hydraulic work machine, and more specifically, for causing a hydraulic work machine that has become abnormal due to an abnormality in an engine or a hydraulic pump to escape from a work place to a safe place. The present invention relates to an emergency escape method for a hydraulic working machine.

  A hydraulic working machine equipped with a traveling device and a working device that is operated by pressure oil supplied via a hydraulic circuit from a hydraulic pump driven by an engine for laying and maintenance work of railway tracks, maintenance work of peripheral facilities, etc. Is used. Usually, the work on the railway track is performed after the last train passes and before the first train starts operation, and it is necessary to promptly evacuate from the railway track after the work is completed.

  In addition, when working on railway tracks such as under overhead lines, overpasses, and tunnels, abnormalities occur in the hydraulic work machine engine or hydraulic pump for some reason, and pressure oil can be supplied to traveling equipment. In the event that the hydraulic work machine cannot be withdrawn from the railway track, the emergency work device for operating the hydraulic work machine from the outside and causing the hydraulic work machine to escape from the railway track is put on standby. It is done.

  As the emergency escape device, a hydraulic power source unit composed of a prime mover, a hydraulic pump and a hydraulic oil tank, a hydraulic motor driven by pressure oil generated by the hydraulic power source unit, and driven by this hydraulic motor, an abnormality occurred. An escape device having a motor unit comprising a hydraulic pump connectable to a hydraulic circuit of a hydraulic working machine has been proposed, and a hydraulic pump of another hydraulic working machine is used as the hydraulic power source unit Has also been proposed (see, for example, Patent Document 1).

JP-A-11-148148

  However, although Patent Document 1 proposes to use another hydraulic working machine as the hydraulic power source unit, another hydraulic working machine is used as the hydraulic power source unit, and the hydraulic pressure of the motor unit is obtained by pressure oil from here. Since the pump is driven and the pressure oil generated by the hydraulic pump of this motor unit is supplied to the hydraulic circuit of the hydraulic working machine where the abnormality has occurred, another hydraulic working machine and motor unit that become the hydraulic power source unit Between the motor unit and the hydraulic work machine where the abnormality occurred, it is necessary to take out the hydraulic hoses that have been separately stored in the wound state and connect them to each other. Pull out the heavy and thick hydraulic hoses for a long time. Therefore, there is a problem that it takes a lot of work and takes a long time because it has to be carried and connected manually.

  An object of the present invention is to provide an emergency escape method for a hydraulic work machine that can easily carry out a work of making a hydraulic work machine in which an abnormality has occurred escape from a work place such as a railway track to a safe place. It is said.

  In order to achieve the above object, an emergency escape method for a hydraulic working machine according to the present invention includes a hydraulic working machine having a traveling device that is operated by pressure oil supplied from a hydraulic pump driven by an engine via a hydraulic circuit. In the emergency escape method for a hydraulic working machine using an emergency escape device for causing the hydraulic work machine to escape from a work place when an abnormality occurs in the engine or the hydraulic pump in the above, the emergency escape device includes: An engine different from the hydraulic work machine, a hydraulic pump driven by the engine, and a pressure oil supply device for supplying pressure oil from the hydraulic pump to the hydraulic work machine, The oil supply device includes a hydraulic hose that connects a hydraulic circuit of the emergency escape device and a hydraulic circuit of the hydraulic work machine, a hose reel that winds up the hydraulic hose, and the hose reel. A hydraulic motor that rotates, and when the hydraulic work machine is urgently escaped, a first step of moving the emergency escape device to the vicinity of the hydraulic work machine, and the hydraulic hose is unwound from the hose reel. The second step of connecting to the hydraulic circuit of the hydraulic working machine, and the emergency escape device is hydraulically moved by moving the emergency escape device in a state where the supply of pressure oil from the hydraulic oil supply device to the hydraulic working machine is stopped The third step of separating the working machine from the hose reel and feeding the hydraulic hose from the hose reel, and the hydraulic oil to the hydraulic circuit of the hydraulic working machine from the pressure oil supply device via the hydraulic hose with the movement of the emergency escape device stopped. And operating the traveling device of the hydraulic work machine to bring the hydraulic work machine closer to the emergency escape device, and the hydraulic motor moves the hose reel to the hydraulic hoist. The fourth step of rotating in the winding direction, and the movement of the emergency escape device when the hydraulic work device reaches the escape position of the hydraulic work device by performing the third step and the fourth step at least once. In a state in which the hydraulic work machine is stopped, the hydraulic oil is supplied from the pressure oil supply device to the hydraulic circuit of the hydraulic work machine through the hydraulic hose, and the traveling device of the hydraulic work machine is operated to escape the hydraulic work machine. And performing the fifth step.

  In the emergency escape method for a hydraulic working machine according to the present invention, the hydraulic motor for rotating the hose reel may freely rotate the hose reel in the second step, the third step, and the fifth step. The fourth step is characterized in that the hose reel is rotated in the winding direction of the hydraulic hose below a preset torque.

  Further, the pressure oil supplied from the hydraulic circuit of the emergency escape device to the hydraulic circuit of the hydraulic work machine is returned from the hydraulic circuit of the hydraulic work machine to the hydraulic circuit of the emergency escape device and collected.

  Further, the pressure oil supply device is detachably attached to the emergency escape device, and the emergency escape device has a hydraulic circuit from the hydraulic pump driven by the engine of the emergency escape device. It is characterized by having a traveling device that is operated by pressure oil supplied through the vehicle. Further, the emergency escape device includes an upper swing body that is turnably provided on the traveling device, and is hydraulically operated from the hydraulic pump that is driven by the engine of the emergency escape device at a front portion of the upper swing body. A front device mounting portion for mounting a hydraulic work machine operated by the pressure oil supplied via a circuit, and the pressure oil supply device and the hydraulic work machine can be attached to and detached from the front device mounting portion. It is characterized by being attached to.

  The emergency escape method of the hydraulic work machine according to the present invention is such that when an abnormality occurs in the hydraulic work machine, the emergency escape device that has been waiting at a predetermined position travels close to the hydraulic work machine in which the abnormality has occurred. After connecting the hydraulic hose, the emergency escape device and the hydraulic work machine are driven alternately to make the hydraulic work machine escape from the railroad track, so the hydraulic supply capacity of the emergency escape device is minimized. This eliminates the need for other equipment such as the motor unit described above, simplifies the structure of the emergency escape device and pressure oil supply device, and reduces the size of the device. It is possible to evacuate promptly from work places such as in railway tracks.

  In addition, it is equipped with a pressure oil supply device in a state where a hydraulic hose is wound around a hose reel, so there is no need to take out and prepare a hydraulic hose that has been separately stored in a wound state as in the past. Since the length of the hydraulic hose handled sometimes can be shortened, the connection work of the hydraulic hose can be easily performed. Furthermore, in order to run the two alternately, it is necessary to pull out and wind up the hydraulic hose from the hose reel. However, it is easy to wind up the hydraulic hose by providing a hydraulic motor on the hose reel. It can be carried out.

  Further, as an emergency escape device used in the method of the present invention, the pressure oil supply device and a hydraulic work machine that is operated by pressure oil on the front device mounting portion of the upper swing body that is turnably provided on the traveling device, By selecting the pile driving machine and making it mountable, the pressure oil supply device is removed and the pile driving machine is moved to the front device except when it is necessary to wait for escape of the hydraulic working machine. A pile driving operation similar to that of a normal pile driver only by changing the hydraulic circuit connected to the pressure oil supply device to a hydraulic motor or cylinder for operating the pile driving machine while being mounted on the mounting portion. Can be used for Thereby, except when using as an emergency escape apparatus, since it can be used as a pile driver, the utilization efficiency of an emergency escape apparatus can be improved.

It is explanatory drawing which shows one example of the emergency escape method of this invention. It is a side view which shows the emergency escape apparatus of the state which mounts | wears with a pressure oil supply apparatus. It is also a plan view. It is a side view which shows the emergency escape apparatus of the state equipped with the pile driving | operation machine. It is a circuit diagram which shows the outline of the hydraulic circuit of the emergency escape device when a pile driving machine is mounted. It is explanatory drawing which shows the flow of the pressure oil at the time of only an emergency escape device drive | working in the state which connected the hydraulic circuit of the hydraulic working machine which abnormality generate | occur | produced, and the hydraulic circuit of the emergency escape device via the hydraulic hose. Similarly, it is explanatory drawing which shows the flow of the pressure oil at the time of only the pile driver in which abnormality generate | occur | produced drive | works. It is explanatory drawing which shows the flow of the pressure oil at the time of performing an auger excavation with the pile driving machine which abnormality similarly generate | occur | produced. It is explanatory drawing which shows the flow of the pressure oil at the time of performing the raising / lowering operation of the auger of a pile driver or the turning operation | movement of an upper turning body where abnormality occurred similarly.

  The emergency escape device 11 used for carrying out the present invention includes a traveling device 12 provided with a crawler, an upper revolving body 13 that is turnable on the traveling device 12, and a front portion of the upper revolving body 13. The apparatus main body 15 is provided with a front device mounting portion 14 provided on the front device, and the pressure oil supply device 16 and the pile driving machine 17 are detachably mounted on the front device mounting portion 14. An engine, a hydraulic pump, a hydraulic circuit, a fuel tank, and the like are provided inside the upper swing body 13, and a driver's cab 18 is provided on one upper side. A front jack 13a and a rear jack 13b are provided at the four front and rear, right and left corners of the upper swing body 13, and a pressure oil supply device mounting portion for mounting a pressure oil supply device 16 is mounted on the front device mounting portion 14. 14a and a pile driving machine mounting portion 14b for mounting the pile driving machine 17 are provided.

  The pressure oil supply device 16 includes four hose reels 22 arranged in parallel on a gantry 21, and is connected to the rear end portion of the gantry 21 with the pressure oil supply device mounting portion 14 a. A connecting portion 23 is provided. Each hose reel 22 is arranged with its rotation axis directed in the width direction of the upper swing body 13, and a hydraulic circuit connecting portion 24 having a swivel joint is provided at the end of the rotation shaft. Hydraulic motors 25 for rotation are connected to each other via a chain. Each hose reel 22 is wound with a hydraulic hose 26 whose base end communicates with the hydraulic circuit connecting portion 24. At the tip of each hydraulic hose 26, there is provided a coupler 27 for connecting to the hydraulic circuit of the hydraulic working machine in which an abnormality has occurred, and the coupler 27 is held at the front end of the gantry 21 during standby. .

  The pile driving machine 17 has a proximal end attached to a leader 32 supported by a leader attaching portion provided at the front end of the bracket 31 so as to be able to undulate and tiltable, and a undulating cylinder attaching portion provided at the rear end of the bracket 31, A hoisting cylinder 33 having a tip attached to the rear side of the reader 32, a working device that moves up and down along the reader 32, for example, an auger driving device 34, a lifting means 35 for lifting the auger driving device 34, and a lifting device A winch (see FIG. 5) 36 is provided, and a hydraulic circuit for operating each of the hoisting cylinder 33, the auger drive device 34, the elevating means 35 and the winch 36 is connected.

  The hydraulic circuit 41 provided in the apparatus main body 15 is configured to switch and supply a plurality of hydraulic pumps 42, an engine 43 that drives the hydraulic pumps 42, and pressure oil supplied from the hydraulic pumps 42 to a predetermined circuit. And a plurality of control valves 44. The apparatus main body 15 includes a pair of left and right traveling hydraulic motors 12ML and 12MR for operating the traveling apparatus 12, and a turning hydraulic motor 13M for rotating the upper swing body 13. The hydraulic circuit 41 is connected.

  As shown in FIG. 5, the hydraulic circuit when the pile driving machine 17 is attached to the apparatus main body 15 includes each circuit from a plurality of control valves 44 provided in the hydraulic circuit 41, and the pile driving machine 17. The hoisting cylinder 33, the hydraulic motor 34M of the auger drive device 34, the hydraulic motor 35M of the elevating means 35, and the hydraulic motor 36M of the winch 36 are connected to each other, and each control valve 44 is operated. These devices are configured to operate. In order to avoid complication of the drawing, FIG. 5 shows only main circuits used when the pile driving machine 17 is mounted on the apparatus main body 15, and the return circuit from each device and the front jack 13a. The circuit for operating the rear jack 13b and the like and the circuit when the pressure oil supply device 16 is mounted are not shown.

  As shown in FIGS. 4 and 5, the pile driving machine 17 is mounted on the apparatus main body 15, and the hydraulic circuit 41 switched by a plurality of control valves 44 is connected to the cylinder and the hydraulic motor of the pile driving machine 17, respectively. Therefore, it can be used as a normal pile driving machine for pile driving work or ground improvement work.

  When the pressure oil supply device 16 is attached to the device body 15, as shown in FIGS. 6 to 9, each circuit from the plurality of control valves 44 provided in the hydraulic circuit 41 is connected to each hose reel 22. Each hydraulic hose 26 is connected via a hydraulic circuit connecting portion 24. One control valve 44 is provided with a hose reel hydraulic circuit 61 for operating the hydraulic motor 25 for rotating each hose reel 22. The hose reel hydraulic circuit 61 includes a rotation state switching unit 62 for switching the rotation of the hose reel 22 between a winding rotation state and a free rotation state, and a torque switching unit 63 for switching the rotation torque of the hose reel 22. Is provided. 6 to 9 also show only main circuits used when the pressure oil supply device 16 is attached to the apparatus main body 15, and illustrations of return circuits and the like from the respective parts are omitted as in the above.

  The rotation state switching means 62 switches a supply side circuit for supplying pressure oil to the hydraulic motor 25 for driving the hose reel and a return side circuit for returning pressure oil from the hydraulic motor 25 between a non-communication state and a communication state. Is used, and the supply circuit and the return circuit are brought into a non-communication state (FIGS. 7 to 9), so that the hydraulic circuit 61 for hose reel is supplied from the hydraulic pump 42 through one control valve 44. Pressure oil supplied to the side circuit is supplied to each hydraulic motor 25, and each hose reel rotates in the direction of winding the hydraulic hose by the hydraulic motor 25, and the hydraulic hose 26 is wound around the hose reel 22. The pressure oil discharged from each hydraulic motor 25 passes through the return side circuit and finally returns to the hydraulic oil tank in the hydraulic circuit 41.

  The rotation state switching means 62 causes the supply side circuit and the return side circuit of the hose reel hydraulic circuit 61 to communicate with each other as shown in FIG. 6 so that the hydraulic oil can freely flow between the supply side circuit and the return side circuit. Therefore, the hydraulic motors 25 can be freely rotated, and the hose reel 22 is freely rotated. This free rotation state of the hose reel 22 is used when the hydraulic hose 26 is pulled out from the hose reel 22, that is, when the hose reel 22 is rotated in the direction opposite to the winding direction of the hydraulic hose 26.

  Further, the torque switching means 63 is formed by combining a relief valve 63a and a switching valve 63b, and the set pressure of the relief valve 63a has a sufficiently low rotational torque as long as the hydraulic hose 26 can be wound. It is set to a pressure that can be applied to the reel 22 (hydraulic motor 25). The switching valve 63b has a low torque position for connecting the supply side circuit and the return side circuit of the hydraulic circuit 61 for the hose reel via the relief valve 63a, and a high torque position for blocking the supply side circuit and the return side circuit. If the switching valve 63b is set to the high torque position, the hydraulic oil supplied to the supply side circuit is supplied to each hydraulic motor 25, and the hydraulic motor 25 is at a pressure corresponding to the supply pressure from the hydraulic pump 42. And the hose reel 22 is rotated with high torque in the direction of winding the hydraulic hose 26.

  When the switching valve 63b is set to the low torque position, when the pressure oil supply pressure to the hydraulic motor 25 is equal to or lower than the set pressure of the relief valve 63a, the hose reel is rotated at a low torque at a pressure equal to or lower than the set pressure. When the pressure exceeds the set pressure of the relief valve 63a, the relief valve 63a is opened and the supply side circuit and the return side circuit are in communication with each other, so that hydraulic oil can freely flow between the supply side circuit and the return side circuit. Thus, the hose reel 22 is in a freely rotating state. In this way, by forming the hose reel 22 so as not to rotate in the winding direction beyond a preset torque, it is possible to prevent a large tensile load from acting on the hydraulic hose 26 when the hydraulic hose 26 is wound. The hose 26 can be protected.

  On the other hand, as shown in FIG. 1, a hydraulic work machine that performs work in a railway track, in this embodiment, a pile driver 72 for work in a railway track equipped with a short leader 71 is a normal pile driver. Similarly, a traveling device 73 provided with a crawler, an upper revolving body 74 provided on the traveling device 73 so as to be able to swivel, the reader 71 provided at a front portion of the upper revolving body 74, and the reader 71 A raising and lowering cylinder 75 for supporting the auger drive device 76, an auger drive device 76 that is a working device that moves up and down along the reader 71, a lifting means 77 for moving the auger drive device 76 up and down along the leader 71, and a lifting device A winch 78 and the like are provided, and a hydraulic circuit 81 for operating them is provided.

  The hydraulic circuit 81 of the pile driver 72 is a plurality as shown in FIGS. 6 to 9 (in FIGS. 7 to 9, only the main parts of the hydraulic circuit 41 and the hydraulic circuit 81 are denoted by reference numerals). A hydraulic pump 82, an engine 83 for driving the hydraulic pump 82, a plurality of control valves 84 for switching and supplying pressure oil supplied from the hydraulic pump 82 to a predetermined circuit, and the plurality of control valves 84. And a circuit for operating the equipment to be switched. The circuit for operating the equipment is a turning hydraulic pressure for turning the pair of left and right hydraulic hydraulic motors 73ML and 73MR for operating the traveling device 73 and the upper swing body 74 from each control valve 84. The motor 74M, the hoisting cylinder 75, the hydraulic motor 76M of the auger drive device 76, the hydraulic motor 77M of the elevating means 77, and the hydraulic motor 78M of the winch 78 are connected. Furthermore, as a hydraulic working machine for working on a railroad track, an external circuit connection unit 85 for connecting an external hydraulic circuit, and hydraulic fluid derived from each device in the hydraulic circuit 81 is connected to an external circuit connection unit. A return circuit switching valve 86 for switching to the 85 side is provided. The external circuit connecting portion 85 is provided with a coupler receiver 85 a corresponding to the coupler 27 provided at the tip of the hydraulic hose 26. The coupler receiver 85a and the coupler 27 are closed by a check valve when not connected, and have a structure that automatically opens and communicates when both are connected.

  In the normal state, the pile driver 72 switches the return circuit switching valve 86 to the hydraulic oil tank 87 side in the hydraulic circuit 81 and uses the hydraulic circuit 81 of the own machine. In the state where the upper swing body 74 is swung to a predetermined angle, the angle of the leader 71 is adjusted by the hoisting cylinder 75 and the auger drive device 76 is moved up and down by the lifting means 77 and the auger drive device 76 is moved. Operate the pile driving work. At this time, the emergency escape device 11 stands by at a predetermined standby position with the pressure oil supply device 16 attached to the front device mounting portion 14.

  When an abnormality occurs in the engine 83 or the hydraulic pump 82 during the work and the pile driver 72 cannot move from the work place to a predetermined evacuation place by itself, the emergency escape device 11 cannot be used under the overhead line. The vehicle enters the railroad track from the standby place and travels to the nearest pile driver 72 where the abnormality has occurred (first step). Then, the rotation state switching means 62 is switched to the free rotation state of the hose reel 22, the hydraulic hose 26 is pulled out from each hose reel 22, and the hydraulic hose 26 is connected to the external circuit connection portion 85 of the pile driving machine 72. (Second step). At this time, the length of the hydraulic hose 26 pulled out from the hose reel 22 and connected to the emergency escape device 11 as close as possible to the pile driver 72, for example, close to 1 to several meters, is about several meters. It is possible to connect the heavy and thick hydraulic hose 26 easily in a short time. Further, after the hydraulic hose is connected, the return circuit switching valve 86 in the hydraulic circuit 81 of the pile driving machine 72 is switched to the external circuit connecting portion 85 side.

  The escape operation of the pile driver 72 by the emergency escape device 11 after the hydraulic hose is connected is performed by alternately running the emergency escape device 11 and the pile driver 72 as shown in FIG.

  First, as shown in FIG. 1 (A), the emergency escape device 11 is caused to travel in the direction of the evacuation place (retreat direction) in a state after the hydraulic hose is connected. At this time, the rotation state switching means 62 in the hydraulic circuit 41 of the emergency escape device 11 is set to the position of the free rotation state of the hose reel, the torque switching means 63 is set to an arbitrary position, and the control valve 44 is set to the hydraulic circuit 81 of the pile driving machine 72. No pressure oil is supplied to the emergency escape device 11 and the traveling device 12 of the emergency escape device 11 is operated in the backward direction.

  As a result, the hydraulic fluid boosted by the hydraulic pump 42 of the hydraulic circuit 41 passes through the circuit L11 from the predetermined control valve 44 and is supplied to the left traveling hydraulic motor 12ML and the right traveling hydraulic motor 12MR, respectively. The emergency escape device 11 is moved away from the pile driver 72 by operating. At this time, since the rotation state switching means 62 is in the free rotation state of the hose reel 22, the hydraulic hose 26 is pulled out from the hose reel 22 as the emergency escape device 11 is separated from the pile driving machine 72. (Third step).

  As shown in FIG. 1B, the emergency escape device 11 is stopped when the emergency escape device 11 is separated from the pile driving machine 72 to a predetermined distance, for example, a distance corresponding to the length of the hydraulic hose 26, and the hydraulic circuit The hydraulic oil boosted by the hydraulic pump 42 is supplied to the hydraulic circuit 81 of the pile driving machine 72, and the pile driving machine 72 is moved backward to a position close to the emergency escape device 11.

  That is, as shown in FIG. 7, the hydraulic oil boosted by the hydraulic pump 42 of the hydraulic circuit 41 is supplied from the predetermined control valve 44 to the hydraulic circuit 81 of the pile driving machine 72 via the pressure oil supply device 16. The traveling device 73 of the hammer 72 is operated in the backward direction, and the hydraulic oil returning from the return circuit switching valve 86 via the external circuit connection portion 85 is supplied from the predetermined control valve 44 to the hydraulic oil tank 45 of the hydraulic circuit 41. To recover. Further, the rotational state switching means 62 is in a non-communication state, and the torque switching means 63 is in a low torque position.

  The hydraulic oil boosted by the hydraulic pump 42 passes through a plurality of supply-side circuits L12, a supply-side hydraulic hose 26 connected to the supply-side circuit L12, and an external circuit connection portion 85 from a predetermined control valve 44. It is supplied to the discharge side circuit L13 of the pump 82 in the hydraulic circuit 81. As a result, the pile driving machine 72 performs a traveling operation in the same backward direction as in the normal state, so that the left traveling hydraulic motor 73ML and the right traveling hydraulic motor are passed from the predetermined control valve 84 through the supply side circuit L14. Pressure oil is respectively supplied to 73MR, and the pile driving machine 72 travels in a direction in which the traveling device 73 operates in the backward direction and approaches the emergency escape device 11.

  The hydraulic oil discharged from the hydraulic motors 73ML and 73MR returns to a predetermined control valve 84 from a return side circuit (forward side circuit) (not shown), passes through a circuit L15, a return circuit switching valve 86, and a circuit L16, and further to an external circuit. The hydraulic hose 26 on the return side passes through the connection portion 85, passes through the circuit L17 of the hydraulic circuit 41, and is recovered from the predetermined control valve 44 to the hydraulic oil tank 45 of the hydraulic circuit 41.

  At the same time, each hydraulic motor 25 of the hose reel 22 is set in a state of rotating in the winding direction with a low torque by the torque switching means 63, so that the pile driving machine 72 approaches the emergency escape device 11. When the hydraulic hose 26 is wound around the hose reel 22 and the pile driving machine 72 is stopped, the hose reel 22 is idled to protect the hydraulic hose 26 and the coupler 27 (fourth step).

  And as shown in FIG.1 (C), when the pile driver 72 approachs the emergency escape apparatus 11 to the predetermined distance, by stopping the pile driver 72, it is the same as the said FIG. 1 (A). After that, until the pile driver 72 reaches the evacuation place and is ready to escape, the emergency escape device 11 travels (third process) and the pile driver 72 travels (fourth process). Repeat alternately. Accordingly, the pile driver 72 is retracted from the railroad track to escape from the railroad track (fifth step), and the emergency escape device 11 is retracted from the railroad track so that the train can travel on the railroad track. Can be.

  Further, by connecting the hydraulic circuit 41 of the emergency escape device 11 in correspondence with the discharge side circuit of the pump 82 in the hydraulic circuit 81 of the pile driver 72, the pile driver 72 performs the same pile driving operation as usual. It is also possible to perform. For example, as shown in FIG. 8, when performing a pile driving work by the pile driving machine 72, the pile driving machine 72 from the hydraulic circuit 41 of the emergency escape device 11 through the pressure oil supply device 16 and the external circuit connection portion 85. The pressure oil supplied to the hydraulic circuit 81 may be supplied from a predetermined control valve 84 to the hydraulic motor 76M of the auger drive device 76 and the hydraulic motor 77M of the lifting / lowering means 77 via the circuit L18. Furthermore, as shown in FIG. 9, the upper turning body 74 of the pile driving machine 72 can be turned by supplying pressure oil to the turning hydraulic motor 74M via the circuit L19, and the pressure oil is supplied from the circuit L20. By doing so, the expansion and contraction of the hoisting cylinder 75, the operation of the winch 78 by supplying pressure oil from the circuit L21, and the operation of the front jack and the rear jack can be performed by selecting each circuit.

  Therefore, even if an abnormality occurs in the engine or the hydraulic pump in the pile driving machine 72 during the pile driving work, not only can the pile driving machine 72 be able to travel in the railway track, but also the emergency escape device 11 By connecting the hydraulic circuit 41, the pile driving machine 72 can perform the pile driving work as usual, so that the train can run without finishing the pile driving work in a halfway state. You can evacuate and escape after working.

  The emergency escape device 11 needs to wait at a predetermined position with the pressure oil supply device 16 mounted when the pile driving machine 72 performs the work in the railway track. During the period not to be performed, each circuit of the hydraulic circuit 41 is removed from the pressure oil supply device 16, the pressure oil supply device 16 is removed from the front device attachment portion 14, and the pile driving machine 17 is attached to the front device attachment portion 14. By connecting each circuit of the hydraulic circuit 41 to a predetermined position of the pile working machine 17, it can be used as a normal pile driver as shown in FIGS. 4 and 5. Therefore, it is not necessary to store in a standby state for a long period of time unlike an emergency escape device, and conversion from a pile driver to the emergency escape device 11 can be easily performed. The main body 15 can be used effectively, and the operating efficiency can be improved. Further, since the hydraulic hose 26 can be stored while being wound around the hose reel 22 provided in the pressure oil supply device 16, the hydraulic hose separately wound and stored on the reel as in the prior art can be used at the construction site. It is no longer necessary to transport it.

  In this embodiment, the pile driving machine that performs the pile driving work in the railway track is illustrated as the hydraulic working machine that uses the emergency escape device, but the emergency escape method of the present invention is driven by the engine. It is possible to cope with various hydraulic working machines such as cranes and excavators equipped with traveling devices that are operated by pressure oil supplied from a hydraulic pump through a hydraulic circuit. In addition, the work place of the hydraulic work machine to be escaped is not particularly limited, and it is suitable for escape of a hydraulic work machine that works in a place where a crane can not be used such as under an overhead line, under a bridge, in a tunnel, It can be used in the same way for escape of a hydraulic working machine that performs work in various other places.

Further, in the embodiment, as an emergency escape device, a traveling device, an upper swing body and a front device mounting portion are provided, and a pressure oil supply device or a pile driving machine can be attached to the front device mounting portion, Although an emergency escape device provided with an engine, a hydraulic pump, a hydraulic circuit, a fuel tank, a driver's cab, etc. has been illustrated, the emergency escape device is similar to the above in the main body having the engine, the hydraulic pump, the hydraulic circuit, and the fuel tank. It may be a dedicated emergency escape device equipped with a pressure oil supply device. Moreover, the traveling device serving as the moving means may be provided integrally with the main body, or a separate device may be used. The traveling device is not limited to a crawler, and may be a wheel.

  The hydraulic work machine to be mounted on the front device mounting part is not limited to the pile driving machine, and an excavator or the like can be mounted, and the hydraulic work machine to be mounted on the front device mounting part is removable. For example, two units can be formed by adding a hydraulic circuit that is required when the pressure oil supply device is mounted. One of the pile drivers can be used as a pile driver for performing a predetermined operation, and the other can be used as an emergency escape device.

  DESCRIPTION OF SYMBOLS 11 ... Emergency escape device, 12 ... Traveling device, 12ML ... Left traveling hydraulic motor, 12MR ... Right traveling hydraulic motor, 13 ... Upper turning body, 13a ... Front jack, 13b ... Rear jack, 13M ... Turning hydraulic motor, DESCRIPTION OF SYMBOLS 14 ... Front apparatus attaching part, 14a ... Pressure oil supply apparatus mounting part, 14b ... Pile driving | operation machine mounting part, 15 ... Apparatus main body, 16 ... Pressure oil supply apparatus, 17 ... Pile driving | operation machine, 18 ... Driver's cab, 21 DESCRIPTION OF SYMBOLS 22: Hose reel 23 ... Connection part 24 ... Hydraulic circuit connection part 25 ... Hydraulic motor 26 ... Hydraulic hose 27 ... Coupler 31 ... Bracket 32 ... Leader 33 ... Lifting cylinder 34 ... Auger Drive device, 34M ... hydraulic motor, 35 ... lifting means, 35M ... hydraulic motor, 36 ... winch, 36M ... hydraulic motor, 41 ... hydraulic circuit, 42 ... hydraulic pump, 43 ... d Gin, 44 ... control valve, 45 ... hydraulic oil tank, 61 ... hydraulic circuit for hose reel, 62 ... rotational state switching means, 63 ... torque switching means, 63a ... relief valve, 63b ... switching valve, 71 ... leader, 72 ... Pile driver, 73 ... traveling device, 73ML ... Left traveling hydraulic motor, 73MR ... Right traveling hydraulic motor, 74 ... Upper turning body, 74M ... Rotating hydraulic motor, 75 ... Elevation cylinder, 76 ... Ogre drive device, 76M DESCRIPTION OF SYMBOLS ... Hydraulic motor, 77 ... Lifting means, 77M ... Hydraulic motor, 78 ... Winch, 78M ... Hydraulic motor, 81 ... Hydraulic circuit, 82 ... Hydraulic pump, 83 ... Engine, 84 ... Control valve, 85 ... External circuit connection part, 85a ... Coupler receptacle, 86 ... Return circuit switching valve, 87 ... Working oil tank

Claims (6)

  When an abnormality occurs in the engine or the hydraulic pump in a hydraulic working machine having a traveling device that is operated by pressure oil supplied from a hydraulic pump driven by an engine via a hydraulic circuit, the hydraulic working machine In an emergency escape method for a hydraulic working machine using an emergency escape device for escaping from a work place, the emergency escape device includes an engine different from the hydraulic work machine and a hydraulic pump driven by the engine. A pressure oil supply device for supplying pressure oil from the hydraulic pump to the hydraulic work machine, the pressure oil supply device comprising a hydraulic circuit for an emergency escape device and a hydraulic circuit for the hydraulic work machine A hydraulic hose that connects the hydraulic hose, a hose reel that winds up the hydraulic hose, and a hydraulic motor that rotates the hose reel. A first step of moving the emergency escape device to the vicinity of the hydraulic working machine, a second step of feeding the hydraulic hose from the hose reel and connecting it to a hydraulic circuit of the hydraulic working machine, and supply of pressure oil A third step in which the emergency escape device is moved away from the hydraulic work device by moving the emergency escape device in a state where the supply of pressure oil from the device to the hydraulic work device is stopped, and the hydraulic hose is fed out from the hose reel; With the movement of the emergency escape device stopped, the hydraulic oil is supplied from the pressure oil supply device to the hydraulic circuit of the hydraulic work machine via the hydraulic hose, and the hydraulic device is operated by operating the traveling device of the hydraulic work machine. A fourth step of causing the hydraulic work machine to approach the emergency escape device and rotating the hose reel in the winding direction of the hydraulic hose by the hydraulic motor, the third step and the fourth step At least once, when the hydraulic work machine reaches the escape position of the hydraulic work machine, the hydraulic work machine is stopped from the pressure oil supply device via the hydraulic hose in a state where the movement of the emergency escape device is stopped A hydraulic work machine emergency escape method comprising: performing a fifth step of supplying hydraulic oil to the hydraulic circuit and operating the traveling device of the hydraulic work machine to escape the hydraulic work machine.   The hydraulic motor that rotates the hose reel causes the hose reel to rotate freely in the second step, the third step, and the fifth step, and in the fourth step, the hose reel is rotated at a torque equal to or lower than a preset torque. 2. The emergency escape method for a hydraulic working machine according to claim 1, wherein the hydraulic hose is rotated in a winding direction.   2. The pressure oil supplied from the hydraulic circuit of the emergency escape device to the hydraulic circuit of the hydraulic work machine is returned from the hydraulic circuit of the hydraulic work machine to the hydraulic circuit of the emergency escape device and collected. Or the emergency escape method of the hydraulic working machine of 2 description.   4. The emergency escape method for a hydraulic working machine according to claim 1, wherein the pressure oil supply device is detachably attached to the emergency escape device. 5.   5. The emergency escape device includes a traveling device that is operated by pressure oil supplied via a hydraulic circuit from the hydraulic pump driven by the engine of the emergency escape device. The emergency escape method of the hydraulic working machine according to any one of the above.   The emergency escape device includes an upper turning body that is turnably provided on the traveling device, and a hydraulic circuit from the hydraulic pump that is driven by the engine of the emergency escape device at a front portion of the upper turning body. And a front device mounting portion for mounting a hydraulic work machine operated by the pressure oil supplied via the pressure oil, and the pressure oil supply device and the hydraulic work machine are detachably attached to the front device mounting portion. 6. The emergency escape method for a hydraulic working machine according to claim 5, wherein:

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