JP2023032960A - Work machine - Google Patents

Abstract

To operate an appropriate actuator according to a content of a work without relying on the operator's judgment.SOLUTION: A first actuator 31 is an actuator different from a dual-purpose actuator 33 and is used for a crane work. A second actuator 32 is an actuator different from the dual-purpose actuator 33 and is used for another work. A first actuator stopping unit (61) stops the first actuator 31 when a second mode is selected by a mode selecting unit 50. Second actuator stopping units (62, 65) stop the second actuator 32 when a first mode is selected by the mode selecting unit 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to a work machine that is used for both crane work and other work.

For example, Patent Document 1 describes a working machine that is used for both crane work and other work (see FIGS. 1 and 5 of the same document).

JP 2020-007052 A

Such work machines are sometimes provided with actuators for crane work and actuators for other work. Conventionally, an operator of a working machine determines which actuator to operate according to the content of the work. Therefore, during crane work, actuators for other work may be actuated, and during other work, actuators for crane work may be actuated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a work machine that can actuate an appropriate actuator according to the content of work without relying on the operator's judgment.

The work machine includes a machine body, a boom, a dual-purpose actuator, a first actuator, a second actuator, a mode selector, a first actuator stop, and a second actuator stop. The boom is attached to the machine body so that it can be raised and lowered. The dual-use actuator is an actuator for use in both crane work using the boom and other work. The other work is work using the boom and is work different from the crane work. The first actuator is an actuator different from the dual-purpose actuator and is used for the crane operation. The second actuator is an actuator different from the dual-purpose actuator and is used for the other work. The mode selection unit selects one of a plurality of modes including a first mode selected when performing the crane work and a second mode selected when performing the other work. is. The first actuator stop section stops the first actuator when the second mode is selected by the mode selection section. The second actuator stop section stops the second actuator when the first mode is selected by the mode selection section.

With the above configuration, it is possible to operate an appropriate actuator according to the content of the work without relying on the operator's judgment.

It is the figure which looked at the working machine 1 from the side. 2 is a block diagram of the working machine 1 shown in FIG. 1; FIG. FIG. 3 is a flowchart showing processing of a controller 80 shown in FIG. 2; FIG.

A working machine 1 will be described with reference to FIGS. 1 to 3. FIG.

The work machine 1 is a machine that performs work using a boom 15, as shown in FIG. The work machine 1 is used for both crane work and "other work". When the work machine 1 performs a crane operation, a hook (not shown) is hung from the boom 15, a load is hung on the hook, and the load is lifted. The working machine 1 in a crane operation state is a crane (for example, a mobile crane). “Other work” is work using the boom 15 and is work different from the crane work. The above "other work" is specifically, for example, foundation civil engineering work. When the working machine 1 performs foundation civil engineering work, for example, a leader 17 and a working device 19, which will be described later, are attached to the boom 15, and the leader 17 and the working device 19 perform the work. The foundation civil engineering work may be, for example, an excavation work for excavating (drilling) the ground, a pile driving work for driving piles into the ground, or a pile extraction work for pulling out piles from the ground. The work machine 1 in a state of performing foundation civil engineering work is a foundation construction machine (vehicle-type construction machine), and may be, for example, an excavator, a pile driver, or a pile extractor. The "other work" may be work different from the crane work and different from the foundation civil engineering work. The working machine 1 includes a machine body 10, a boom 15, a leader 17, a working device 19, and a mode selection control device 20 (see FIG. 2).

The machine main body 10 is a main body portion of the working machine 1 . The machine body 10 includes a lower travel body 11 and an upper revolving body 13 .

The undercarriage 11 allows the work machine 1 to travel. The undercarriage 11 may include crawlers 11a and wheels (not shown). The work machine 1 may be a non-self-propelled machine (for example, a fixed crane).

The upper revolving body 13 is rotatably mounted on the lower traveling body 11 . The upper revolving body 13 includes a revolving frame 13a and a cab 13b. The revolving frame 13a is a structure to which the boom 15 and the like are attached. The driver's cab 13b is a portion where an operator (operator) can operate the work machine 1. As shown in FIG. The work machine 1 may be operated (remotely operated) at a position different from the cab 13b.

The boom 15 is attached to the machine body 10 (more precisely, the upper swing body 13) so that it can be raised and lowered. For example, the boom 15 may be a telescopic boom that can be extended and retracted in the longitudinal direction of the boom 15, and may not be telescopic. Boom 15 may have a box-type structure or may have a lattice structure.

The reader 17 is a structure that positions the work device 19 . The leader 17 is attached to the boom 15 when the work machine 1 performs other work (specifically, foundation work). The leader 17 is arranged so as to extend downward from the boom 15 (for example, the tip end, the upper end). The reader 17 is columnar. For example, the reader 17 comprises an upper reader 17a, an intermediate reader 17b and a lower reader 17c.

The upper reader 17 a constitutes the upper portion of the reader 17 . The upper leader 17a may be provided with a sheave for lifting the working device 19 or the like, for example. The intermediate leader 17b extends downward from the upper leader 17a and has a columnar shape. Lower reader 17 c constitutes the lower portion of reader 17 . The lower leader 17c extends downward from the intermediate leader 17b and has a columnar shape. The lower reader 17c is supported on the ground.

The work device 19 is a device that performs work. The work device 19 is attached to the leader 17 and positioned on the leader 17 when the work machine 1 performs other work (specifically, foundation civil engineering work). For example, the work device 19 may be a device for excavating (drilling) the ground. In this case, working device 19 is an earth auger. In this case, the working device 19 can move along the leader 17 in the longitudinal direction (vertical direction) of the leader 17 . For example, the work device 19 may be a device (pile driving device) for driving piles into the ground. For example, the working device 19 may be a device (pulling device) that pulls out a pile from the ground. Here, a case where the work device 19 is an earth auger for excavating work will be described. The working device 19 includes an auger lifting device 19a, an auger driving device 19b, and an auger drill 19c.

The auger lifting device 19a vertically moves (lifts) the auger drill 19c. The auger lifting device 19a is attached to the leader 17 and moves up and down along the leader 17 . For example, the auger lifting device 19a may be lifted by a foundation civil engineering winch 32a (second actuator 32, second winch), which will be described later. In this case, the auger lifting device 19a may be raised by being lifted from the tip of the boom 15 by a rope (more specifically, a wire rope). The auger lifting device 19 a may be lowered by being pulled down by a rope hung on a sheave (not shown) provided on the lower portion of the leader 17 . It should be noted that the auger lifting device 19a may move up and down with respect to the leader 17 without using the power of the foundation civil engineering winch 32a. For example, the auger lifting device 19a may move up and down with respect to the leader 17 by driving a pinion provided in the auger lifting device 19a with respect to a rack provided in the leader 17 .

The auger driving device 19b rotates the auger drill 19c with respect to the leader 17 . The auger driving device 19b rotationally drives the auger drill 19c about the central axis of the auger drill 19c extending in the longitudinal direction of the auger drill 19c. The auger driving device 19b (auger reducer) includes a motor and a reducer. The auger drill 19c is a drill for excavating the ground.

The mode selection control device 20 (see FIG. 2) is a device that controls stopping of the actuator according to the mode (described later). The mode selection control device 20 includes a first actuator 31 , a second actuator 32 and a dual-use actuator 33 . As shown in FIG. 2, the mode selection control device 20 includes a second actuator hydraulic pressure source 35, a sensor 40, a mode selection section 50, a hydraulic pressure control section 60, and a second actuator hydraulic pressure source control section 65 (second actuator stop portion), a display portion 70, and a controller 80.

The first actuator 31 is an actuator different from the dual-purpose actuator 33 (details will be described later) shown in FIG. An "actuator" is, for example, a hydraulic actuator and may include a hydraulic cylinder, may include a hydraulic motor, or may include a winch with a hydraulic motor (as well as the second actuator 32 and dual-purpose actuator 33). The "actuator" may include an actuator driven by a non-hydraulic pressure (for example, fluid pressure other than hydraulic pressure, electric power, etc.) (same applies to the second actuator 32 and dual-purpose actuator 33). For example, the first actuator 31 is used only when a first mode (described later) is selected by the mode selector 50 (see FIG. 2). Specifically, for example, the first actuator 31 includes a crane winch 31a (first winch). Note that the first actuator 31 may be provided with an actuator other than a winch (the same applies to the second actuator 32).

The crane winch 31a (first winch) is a winch (for example, a hydraulic winch) for use in crane work. The crane winch 31a is a device (hoisting device) that winds up and lets out a rope (the same applies to a foundation civil engineering winch 32a (second winch) described later). Specifically, the crane winch 31a winds up and lets out a rope for hoisting a hook (not shown). Only one crane winch 31a may be provided, or a plurality of crane winches 31a may be provided. The crane winch 31 a may be mounted on the upper swing body 13 (the rear part of the upper swing body 13 in the example shown in FIG. 1 ) or may be mounted on the boom 15 .

The second actuator 32 is an actuator that is different from the dual-purpose actuator 33 (details will be described later), and is an actuator that is used (expected to be used) for "other work". For example, the second actuator 32 is an actuator for use in foundation civil engineering work (actuator for foundation civil engineering). For example, the second actuator 32 is used only when a second mode (described below) is selected. Only one second actuator 32 may be provided, or a plurality of second actuators 32 may be provided. Specifically, for example, the second actuator 32 includes a foundation civil engineering winch 32a (second winch). If the working device 19 (for example, at least one of the auger lifting device 19a and the auger driving device 19b) includes an actuator, this actuator corresponds to the second actuator 32.

The foundation civil engineering winch 32a (second winch) is a winch (for example, a hydraulic winch) for use in "other work." For example, the foundation engineering winch 32a is a winch for use in foundation engineering work. Specifically, for example, the foundation civil engineering winch 32a may wind up and let out a rope for raising and lowering the auger lifting device 19a. The foundation civil engineering winch 32 a may be mounted on the upper revolving body 13 (the front portion of the upper revolving body 13 in the example shown in FIG. 1 ) or may be mounted on the boom 15 . The required performance and applicable regulations differ between the first winch (specifically, the crane winch 31a) used for crane work and the second winch (specifically, the foundation civil engineering winch 32a) used for other work. Therefore, if a winch that can be used for both crane work and other work is provided, the cost (cost of the winch itself and development costs, etc.) may increase. In the work machine 1, a first winch (specifically, a crane winch 31a) used for crane work and a second winch (specifically, a foundation civil engineering winch 32a) used for other work are provided separately. .

The dual-use actuator 33 is an actuator intended for (or intended to be used for) both crane work and "other work." For example, dual-use actuator 33 is an actuator for use in both crane operations and foundation works. For example, the dual-purpose actuator 33 includes a boom hoisting cylinder 33a and a boom telescoping cylinder 33b.

The boom hoisting cylinder 33a raises and lowers the boom 15 with respect to the machine body 10 (more specifically, the upper rotating body 13). The boom hoisting cylinder 33 a is attached to the upper rotating body 13 and the boom 15 . The boom hoisting cylinder 33a is a telescopic hydraulic cylinder (similar to the boom telescopic cylinder 33b).

The boom telescoping cylinder 33 b telescopes the boom 15 . The boom telescopic cylinder 33b is arranged inside the boom 15 . Only one boom telescopic cylinder 33b may be provided, or a plurality of boom telescopic cylinders 33b may be provided. When crane work is performed, the boom 15 is undulated and extended and retracted to change the position of the hook (not shown). When foundation civil engineering work is performed, the boom 15 is undulated and stretched to change the positions of the leader 17 and the working device 19, and also to change the force exerted by the working device 19 on the ground, piles, and the like.

A second actuator hydraulic pressure source 35 (see FIG. 2) supplies pressure oil to the second actuator 32 . The second actuator hydraulic pressure source 35 is, for example, a hydraulic pump.

A sensor 40 (see FIG. 2) detects a load acting on the work machine 1 . More specifically, sensor 40 detects information necessary to calculate a moment (overturning moment) acting on work machine 1 . Specifically, for example, as shown in FIG. 2 , the sensor 40 includes a boom angle sensor 41 , a boom length sensor 42 and a luffing cylinder pressure sensor 43 .

The boom angle sensor 41 detects the hoisting angle (boom angle θ) of the boom 15 with respect to the horizontal direction, as shown in FIG. For example, the boom angle sensor 41 (see FIG. 2) may be an angle sensor that detects the angle of the boom 15 with respect to the upper swing structure 13, or an inclination sensor that detects the inclination of the boom 15 with respect to the horizontal plane.

A boom length sensor 42 (see FIG. 2) detects the length of the boom 15 in the longitudinal direction of the boom 15 (boom length L). For example, the boom length sensor 42 may detect the stroke of the boom telescoping cylinder 33b.

The hoisting cylinder pressure sensor 43 (see FIG. 2) detects the pressure (hydraulic pressure, hoisting cylinder pressure Pb) acting on the boom hoisting cylinder 33a.

The mode selector 50 (see FIG. 2) is for selecting (switching) one of a plurality of modes. A mode selection unit 50 shown in FIG. 2 is operated by an operator of the work machine 1 . For example, the mode selection unit 50 may be arranged inside the operator's cab 13b (see FIG. 1), or may be arranged outside the operator's cab 13b. The mode selection unit 50 is, for example, a switch (mode selection switch), and may be a physical switch or a switch displayed on the screen (for example, a touch-operated switch). Modes selected by mode selection unit 50 include a first mode and a second mode. The first mode is a mode (crane mode) selected when the work machine 1 performs crane work. The second mode is a mode selected when the work machine 1 performs "other work". For example, the second mode is a mode (basic civil engineering mode) selected when the work machine 1 performs foundation civil engineering work. Mode selection unit 50 does not select both the first mode and the second mode at the same time. The second mode is not selected when the first mode is selected. The first mode is not selected when the second mode is selected. The modes selected by the mode selection unit 50 may include modes different from the first mode and the second mode (for example, a third mode, a fourth mode, etc.). For example, the mode selected by the mode selection unit 50 may include a disassembly/assembly mode selected when the work machine 1 is disassembled or assembled.

The hydraulic control unit 60 controls the actuators (the first actuator 31, the second actuator 32, and the dual-use actuator 33) when they are hydraulic. The hydraulic control unit 60 controls the actuation (operation speed, actuation direction) of the actuator. The hydraulic control unit 60 controls stopping of the actuator. Specifically, for example, the hydraulic control unit 60 controls the supply (flow rate, direction) of pressure oil to the actuator. The hydraulic control unit 60 is configured to be able to stop the supply of pressure oil to the actuator. The hydraulic control section 60 includes a first actuator control section 61 (first actuator stop section), a second actuator control section 62 (second actuator stop section), and a dual-purpose actuator control section 63 .

The first actuator control section 61 (first actuator stop section) (crane actuator control section) controls the first actuator 31 . More specifically, the first actuator control section 61 controls the actuation and stoppage of the first actuator 31 according to commands input to the first actuator control section 61 . The first actuator control section 61 stops the first actuator 31 when the second mode is selected by the mode selection section 50 . More specifically, even if the operator performs an operation to operate the first actuator 31 while the second mode is selected by the mode selection unit 50, the first actuator control unit 61 not operate (disable operation). When the second mode is not selected by the mode selection unit 50 (for example, when the first mode is selected), the first actuator control unit 61 operates the first actuator 31 according to the operator's operation. to operate the first actuator 31 . At this time, the first actuator control section 61 does not disable (enable) the operator's operation for operating the first actuator 31 . However, when the load factor M, which will be described later, exceeds the threshold value MA, the first actuator control unit 61 does not operate the first actuator 31 (disables the operation) (details will be described later). For example, the first actuator control section 61 includes a crane winch control section 61a.

The crane winch control section 61a controls the crane winch 31a. Specifically, for example, the crane winch control unit 61a controls winding and unwinding of the rope by the crane winch 31a. The crane winch control section 61a is configured to be able to stop the crane winch 31a.

A second actuator control section 62 (second actuator stopping section) (for example, a foundation civil engineering actuator control section) controls the second actuator 32 . More specifically, the second actuator control section 62 controls actuation and stoppage of the second actuator 32 according to commands input to the second actuator control section 62 . The second actuator control section 62 stops the second actuator 32 when the first mode is selected by the mode selection section 50 . More specifically, even if the operator performs an operation to operate the second actuator 32 while the first mode is selected by the mode selection unit 50, the second actuator control unit 62 not operate (disable operation). When the first mode is not selected by the mode selection unit 50 (for example, when the second mode is selected), the second actuator control unit 62 operates the second actuator 32 according to the operator's operation. to operate the second actuator 32 . At this time, the second actuator control section 62 does not disable (enable) the operator's operation for operating the second actuator 32 . For example, the second actuator control section 62 includes a foundation civil engineering winch control section 62a.

The foundation civil engineering winch control section 62a (second winch control section, second actuator stopping section) controls the foundation civil engineering winch 32a. Specifically, for example, the foundation civil engineering winch control unit 62a controls the winding and feeding of the rope by the foundation civil engineering winch 32a. The foundation civil engineering winch control section 62a is configured to be able to stop the foundation civil engineering winch 32a.

The dual-purpose actuator control section 63 controls the dual-purpose actuator 33 . More specifically, the dual-purpose actuator control section 63 controls the actuation and stoppage of the dual-purpose actuator 33 according to commands input to the dual-purpose actuator control section 63 . When the first mode is selected by the mode selection unit 50, the dual-purpose actuator control unit 63 operates the dual-purpose actuator 33 (does not disable the operation) in accordance with the operator's operation for operating the dual-purpose actuator 33. ). When the second mode is selected by the mode selection unit 50, the dual-purpose actuator control unit 63 operates the dual-purpose actuator 33 according to the operator's operation for operating the dual-purpose actuator 33 (does not disable the operation). ). However, when the load factor M, which will be described later, exceeds the threshold value MA, the dual-purpose actuator control section 63 does not operate the dual-purpose actuator 33 (invalidates the operation) (details will be described later). For example, the dual-use actuator control section 63 includes a boom hoisting control section 63a and a boom extension/contraction control section 63b.

The boom hoisting control section 63a controls hoisting of the boom 15 (see FIG. 1). More specifically, the boom hoisting control section 63a controls the hoisting of the boom 15 by controlling the expansion and contraction of the boom hoisting cylinder 33a.

The boom extension/retraction control section 63b controls extension/retraction of the boom 15 (see FIG. 1). More specifically, the boom telescoping control unit 63b controls telescoping of the boom 15 by controlling telescoping of the boom telescoping cylinder 33b.

The second actuator hydraulic pressure source control section 65 (second actuator stopping section) controls the supply of pressure oil from the second actuator hydraulic pressure source 35 to the second actuator 32 . For example, the second actuator hydraulic pressure source control section 65 may be configured to be able to stop the second actuator hydraulic pressure source 35 . In this case, the second actuator hydraulic pressure source control unit 65 stops the second actuator hydraulic pressure source 35 and stops the supply of pressurized oil from the second actuator hydraulic pressure source 35 to the second actuator 32 . to stop Further, for example, the second actuator hydraulic pressure source control section 65 may be configured to be able to close the piping from the second actuator hydraulic pressure source 35 to the second actuator 32 . In this case, the second actuator hydraulic pressure source control section 65 stops the supply of pressure oil from the second actuator hydraulic pressure source 35 to the second actuator 32 by closing the pipe, thereby stopping the second actuator 32 . In this case, the second actuator hydraulic pressure source 35 does not have to be stopped. In this case, for example, the oil discharged from the second actuator hydraulic pressure source 35 may be returned to the tank (not shown) by switching a switching valve (not shown) provided in the above piping.

The display section 70 displays which mode is selected by the mode selection section 50 . For example, the display unit 70 may be arranged outside the machine body 10 shown in FIG. good too. The display unit 70 may be arranged at a position where it can be visually recognized by the operator of the work machine 1, or at a position where it can be visually recognized by workers outside the work machine 1 (for example, site supervisors, sling workers, etc.). The display unit 70 shown in FIG. 2 may be an indicator light (light, for example, a revolving light). The display unit 70 may perform screen display. The display section 70 includes a first display section 71 and a second display section 72 .

The first display portion 71 (crane mode display portion) displays that the first mode is selected when the first mode (crane mode) is selected by the mode selection portion 50 (the first mode is display to indicate that it is selected).

The second display section 72 (for example, the basic civil engineering mode display section) displays that the second mode is selected when the second mode (for example, the basic civil engineering mode) is selected by the mode selection section 50 ( display to indicate that the second mode is selected).

The controller 80 is a computer that performs signal input/output, computation (processing), information storage, and the like. For example, the functions of the controller 80 are implemented by executing a program stored in a storage unit (not shown) of the controller 80 by a computing unit (not shown). The controller 80 has a function of a safety device (moment limiter) that limits the moment (overturning moment) of the work machine 1 . The controller 80 includes a load factor calculation section 81 , a mode determination section 82 and an output section 83 .

The load factor calculator 81 calculates (calculates) the load factor M of the work machine 1 . The load factor M is the ratio of the current load to the maximum allowable load on the work machine 1 . Load factor calculation unit 81 calculates load factor M based on the detected value input from sensor 40 .

The mode discriminator 82 discriminates which mode is selected by the mode selector 50 .

The output unit 83 outputs commands (control commands, such as electrical signals). For example, the output unit 83 outputs commands to the hydraulic control unit 60 , the second actuator hydraulic pressure source control unit 65 and the display unit 70 .

(activation)
The controller 80 processes as follows. Each step (S11 to S32) below will be described with reference to FIG.

In step S11, the load factor calculator 81 shown in FIG. 2 reads the boom angle θ (see FIG. 1) detected by the sensor 40, the boom length L (see FIG. 1), and the hoisting cylinder pressure Pb. In step S12, the load factor calculator 81 calculates the load factor M from the read boom angle θ, boom length L, and hoisting cylinder pressure Pb.

In step S21, the mode determination unit 82 reads the mode selected by the mode selection unit 50 ("Sw" in FIG. 3). At step S22, the mode determination unit 82 determines the read mode (step S22). If the mode selected by the mode selection unit 50 is the first mode (crane mode, "CR" in FIG. 3), the flow proceeds to step S23. If the mode selected by the mode selection unit 50 is the second mode (for example, the basic civil engineering mode, "FO" in FIG. 3), the flow proceeds to step S24.

In step S23, when the mode selected by the mode selection unit 50 is the first mode (crane mode), the controller 80 stops the second actuator 32 and causes the first display unit 71 to display. More specifically, the output section 83 may output a signal for stopping the second actuator 32 to the second actuator control section 62 . Specifically, for example, the output section 83 may output a signal for stopping the foundation engineering winch 32a to the foundation engineering work winch control section 62a. The output section 83 may output a signal to stop the second actuator hydraulic pressure source 35 to the second actuator hydraulic pressure source control section 65 . The controller 80 may stop both the foundation civil engineering winch 32a and the second actuator hydraulic pressure source 35, or may stop only one of them. When the mode selected by the mode selection unit 50 is the first mode, the controller 80 permits the operation of the first actuator 31 (the stop is released). When the mode selected by the mode selection unit 50 is the first mode, the controller 80 allows the dual-purpose actuator 33 to operate. When the mode selected by the mode selection unit 50 is the first mode, the output unit 83 outputs to the first display unit 71 a signal for displaying that the first mode is selected.

In step S24, when the mode selected by the mode selection unit 50 is the second mode (for example, the basic civil engineering mode), the controller 80 stops the first actuator 31 and causes the second display unit 72 to display. More specifically, in this case, the output section 83 outputs a signal for stopping the first actuator 31 to the first actuator control section 61 . Specifically, for example, the output unit 83 outputs a signal for stopping the crane winch 31a to the crane winch control unit 61a. When the mode selected by the mode selection unit 50 is the second mode, the controller 80 permits the operation of the second actuator 32 (the stop is released). When the mode selected by the mode selection unit 50 is the second mode, the controller 80 allows the dual-purpose actuator 33 to operate. When the mode selected by the mode selection unit 50 is the second mode, the output unit 83 outputs to the second display unit 72 a signal for displaying that the second mode is selected.

In step S31, the controller 80 determines whether or not the load factor M exceeds the threshold value MA. As a result, the controller 80 determines whether or not the overturning moment of the work machine 1 exceeds the overturning moment threshold. The threshold MA is preset in the controller 80 (before this determination is made). If the load factor M does not exceed the threshold value MA (NO in step S31), the controller 80 terminates the current series of processes and starts the next series of processes (returns to start). If load factor M exceeds threshold MA (YES in step S31), the flow proceeds to step S32.

In step S32, when the load factor M exceeds the threshold value MA, the controller 80 stops the first actuator 31 and the dual-purpose actuator 33 (performs the function of the moment limiter). More specifically, in this case, the output section 83 outputs a signal to the first actuator control section 61 (specifically, the crane winch control section 61a) to stop the first actuator 31 (specifically, the crane winch 31a). do. The output section 83 outputs a signal for stopping the dual-purpose actuator 33 to the dual-purpose actuator control section 63 . Specifically, the output section 83 outputs a signal for stopping the boom hoisting cylinder 33a to the boom hoisting control section 63a. The output unit 83 outputs a signal for stopping the boom telescoping cylinder 33b to the boom telescoping control unit 63b. Then, the controller 80 ends the current series of processes and starts the next series of processes (returns to the start).

Note that the controller 80 selects the second actuator according to some condition other than the first mode being selected by the mode selection unit 50 (for example, a condition related to the load of the working machine 1 or the working device 19 (see FIG. 1)). 32 may be stopped.

(Effect of the first invention)
The effects of the working machine 1 shown in FIG. 1 are as follows. The work machine 1 includes a machine body 10 , a boom 15 , a dual-purpose actuator 33 , a first actuator 31 and a second actuator 32 . As shown in FIG. 2, the work machine 1 includes a mode selection section 50, a first actuator control section 61 (first actuator stop section), a second actuator stop section (second actuator control section 62, second actuator hydraulic pressure and a source control unit 65). As shown in FIG. 1, the boom 15 is attached to the machine body 10 so that it can be raised and lowered. The dual-purpose actuator 33 is an actuator for use in both crane work using the boom 15 and "other work" that uses the boom 15 and is different from the crane work. The first actuator 31 is an actuator different from the dual-purpose actuator 33 and is used for crane work. The second actuator 32 is an actuator different from the dual-purpose actuator 33 and is used for other work.

[Arrangement 1] The mode selection unit 50 shown in FIG. 2 is for selecting one of a plurality of modes. The multiple modes include a first mode selected when performing crane work and a second mode selected when performing other work. The first actuator control section 61 stops the first actuator 31 when the second mode is selected by the mode selection section 50 . The second actuator stop section (at least one of the second actuator control section 62 and the second actuator hydraulic pressure source control section 65) stops the second actuator 32 when the first mode is selected by the mode selection section 50. .

[Configuration 1] provides the following effects. When the mode selector 50 selects the first mode, the second actuator 32 stops. When the mode selector 50 selects the second mode, the first actuator 31 stops. Therefore, an appropriate actuator can be operated according to the mode selected by the mode selection unit 50 . Therefore, it is possible to operate an appropriate actuator according to the content of the work without relying on the operator's judgment.

The following effect may be obtained by the above [Configuration 1]. For example, consider a case where the second actuator 32 operates when the first mode (crane mode) is selected by the mode selection unit 50 . In this case, the second actuator 32, which is not originally used for crane work, is used for crane work. Then, it may not be possible to ensure the accuracy of the safety device (controller 80) of the work machine 1 as a crane. As a result, it may not be possible to appropriately limit the operation of the work machine 1 by the safety device. Similarly, it may not be appropriate for the first actuator 31 to operate when the second mode (for example, the basic civil engineering mode) is selected by the mode selector 50 . Therefore, the content of the work and the actuators to be used need to correspond appropriately. Conventionally, the actuator to be used has been determined by the operator's judgment (selection) according to the content of the work. On the other hand, since the work machine 1 of the present embodiment has the above [Configuration 1], an appropriate actuator can be selected according to the mode (work content) selected by the mode selection unit 50 without relying on the operator's judgment. can be activated. As a result, it is possible to ensure the accuracy of the safety device and compliance with laws and regulations.

Further, in the above [Configuration 1], when the first mode is selected by the mode selection unit 50, even if the operator performs an operation to operate the second actuator 32, the second actuator 32 does not operate. . Therefore, the operator can easily notice the mistake of operating the second actuator 32 while selecting the first mode. Similarly, the operator is likely to notice the mistake of operating the first actuator 31 while selecting the second mode. Therefore, the operator easily notices that the mode selected by the mode selection unit 50 does not correspond to the operation performed by the operator (mistake).

(Effect of the second invention)
[Configuration 2] The above-mentioned "other work" is basic civil engineering work.

[Configuration 2] provides the following effects. Since crane work and foundation civil engineering work require actuator performance and applicable regulations to differ, it is important to actuate an appropriate actuator according to the content of the work. By providing [Configuration 1] and [Configuration 2], it is possible to operate appropriate actuators corresponding to each of crane work and foundation civil engineering work.

(Effect of the third invention)
[Configuration 3] The first actuator 31 includes a first winch (crane winch 31a) for use in crane work. The second actuator 32 includes a second winch (eg, foundation engineering winch 32a) for use in other operations.

In the above [configuration 3], each of the first actuator 31 and the second actuator 32 has a winch. Therefore, if the above [configuration 1] is not provided, there is a risk that the second winch for other work (for example, the foundation civil engineering winch 32a) will be used during crane work, and the first winch for crane work ( A crane winch 31a) may be used. On the other hand, since the work machine 1 has the [configuration 1] and the [configuration 3], it is possible to operate an appropriate winch according to the mode (work content) selected by the mode selection unit 50.

(Effect of the fourth invention)
[Configuration 4] The work machine 1 includes a second actuator hydraulic pressure source 35 that supplies pressure oil to the second actuator 32 . The second actuator control section 62 (second actuator stop section) stops the second actuator 32 by stopping the second actuator hydraulic pressure source 35 when the first mode is selected by the mode selection section 50 . .

In the above [Configuration 4], the second actuator 32 is stopped by stopping the supply of pressure oil to the second actuator 32 by stopping the second actuator hydraulic pressure source 35 . Therefore, when the first mode is selected by the mode selector 50, the second actuator 32 can be reliably stopped.

(Effect of the fifth invention)
[Configuration 5] The working machine 1 includes a second actuator hydraulic pressure source 35 that supplies pressure oil to the second actuator 32 . The second actuator stopping section (the second actuator control section 62 or the second actuator hydraulic pressure source control section 65) controls the second actuator 32 and the second actuator hydraulic pressure source when the mode selection section 50 selects the first mode. 35 is stopped.

[Configuration 5] provides the following effects. Compared to the case where both the second actuator 32 and the second actuator hydraulic pressure source 35 are stopped, the cost of the second actuator stopping section (the second actuator control section 62 or the second actuator hydraulic pressure source control section 65) can be suppressed. can. Specifically, for example, if the second actuator 32 is stopped without stopping the second actuator hydraulic pressure source 35, there is no need to provide means for stopping the second actuator hydraulic pressure source 35. FIG. If the second actuator hydraulic pressure source 35 is stopped without stopping the second actuator 32 , there is no need to provide a means for stopping the second actuator 32 .

In this embodiment, the means for stopping the second actuator 32 is also used as the means for controlling the second actuator 32 (the second actuator control section 62), but it is provided separately from the second actuator control section 62. good too. In this embodiment, the means for stopping the second actuator hydraulic pressure source 35 is also used as the means for controlling the second actuator hydraulic pressure source 35 (the second actuator hydraulic pressure source control section 65). may be provided separately.

(Effect of the sixth invention)
[Configuration 6] The work machine 1 includes a first display section 71 and a second display section 72 . The first display portion 71 displays that the first mode is selected when the first mode is selected by the mode selection portion 50 . The second display portion 72 displays that the second mode is selected when the second mode is selected by the mode selection portion 50 .

[Configuration 6] allows a person viewing the first display section 71 or the second display section 72 to grasp the mode selected by the mode selection section 50 .

Specifically, for example, when the first display unit 71 and the second display unit 72 are arranged at positions visible to the operator of the work machine 1, the following effects are obtained. When the first mode is selected by the mode selection unit 50, even if the operator operates the second actuator 32, the second actuator 32 does not operate (see [Configuration 1] above). At this time, the operator can understand the reason why the second actuator 32 does not operate (that the first mode is selected) by checking the display on the first display section 71 . Similarly, when the second mode is selected by the mode selection unit 50, the operator can check the display of the second display unit 72 to find out the reason why the first actuator 31 does not operate (the reason why the second mode is selected). ) can be grasped.

Further, for example, when the first display unit 71 and the second display unit 72 are arranged at positions visible to workers outside the work machine 1 (for example, site supervisors, sling workers, etc.), the following effects are obtained. can get. In this case, an operator outside the work machine 1 can grasp the mode selected by the mode selection unit 50 . As a result, an operator outside the working machine 1 can grasp what machine the working machine 1 is operating as (for example, as a crane, as a foundation construction machine, etc.).

(Modification)
The above embodiments may be modified in various ways. For example, the connections between each component of the embodiment shown in FIG. 2 may be changed. For example, the order of steps in the flow chart shown in FIG. 3 may be changed, and some steps may not be performed. For example, the number of components may vary and some components may not be provided. For example, fixing, coupling, etc. between components may be direct or indirect. For example, what has been described as a plurality of different members or parts may be treated as one member or part. For example, what has been described as one member or portion may be divided into a plurality of different members or portions. For example, each component may have only a portion of each feature (function, arrangement, shape, manufacturing method, operation, etc.).

For example, when the actuators (first actuator 31 , second actuator 32 , dual-purpose actuator 33 ) include electric actuators, controller 80 may perform operations corresponding to hydraulic control section 60 . In this case, the controller 80 becomes the first actuator stop and the second actuator stop.

1 working machine 10 machine body 15 boom 31 first actuator 31a crane winch (first winch)
32 second actuator 32a foundation civil engineering winch (second winch)
33 dual-purpose actuator 35 second actuator hydraulic pressure source 50 mode selection section 61 first actuator control section (first actuator stop section)
62 second actuator control section (second actuator stop section)
65 Second actuator hydraulic pressure source control unit (second actuator stop unit)
71 first display section 72 second display section

Claims (6)

machine body and
a boom hoistably attached to the machine body;
a dual-purpose actuator that is used for both crane work using the boom and work using the boom that is different from the crane work;
a first actuator that is different from the dual-purpose actuator and that is used for the crane operation;
a second actuator different from the dual-purpose actuator and used for the other work;
a mode selection unit for selecting one of a plurality of modes including a first mode selected when performing the crane work and a second mode selected when performing the other work;
a first actuator stop unit that stops the first actuator when the second mode is selected by the mode selection unit;
a second actuator stop unit that stops the second actuator when the first mode is selected by the mode selection unit;
comprising
working machine. A work machine according to claim 1,
The other work is foundation civil engineering work,
working machine. The working machine according to claim 1 or 2,
The first actuator includes a first winch that is a winch for use in the crane operation,
The second actuator comprises a second winch that is a winch for use in the other work,
working machine. The working machine according to any one of claims 1 to 3,
A second actuator hydraulic pressure source that supplies pressure oil to the second actuator,
The second actuator stop unit stops the second actuator by stopping the second actuator hydraulic pressure source when the first mode is selected by the mode selection unit.
working machine. The working machine according to any one of claims 1 to 4,
A second actuator hydraulic pressure source that supplies pressure oil to the second actuator,
the second actuator stop unit stops only one of the second actuator and the second actuator hydraulic pressure source when the first mode is selected by the mode selection unit;
working machine. The working machine according to any one of claims 1 to 5,
a first display unit displaying that the first mode is selected when the first mode is selected by the mode selection unit;
a second display unit for displaying that the second mode is selected when the second mode is selected by the mode selection unit;
comprising
working machine.

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