Portable operation device of work machine

Abstract

To provide a portable operation device of a work machine capable of improving operability according to an operator who operates a work machine that includes a work attachment.SOLUTION: A portable operation device 100 of a work machine includes: a housing 150 carried by an operator during an operation of a work machine; a left operation lever 121L and a right operation lever 121R provided in the housing 150 and operated by the operator; and an adjustment mechanism PAM capable of adjusting at least one of a position and a posture of the left operation lever 121L and the right operation lever 121R with respect to the operator.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a portable operating device for a work machine.

Background Art

[0002] Conventionally, a portable shoulder-type operation panel for a construction machine used when operating a construction machine having a remote operation function is known (for example, Patent Document 1). This conventional shoulder-type operation panel for a construction machine constitutes a transmitter that transmits a remote operation signal to a receiver mounted on the main body of the construction machine. This operation panel is provided with handrests on the left and right side surfaces of the operation panel main body to which an operation lever operated by a finger is attached on the upper surface. Further, the handrests are attached so that their vertical positions can be adjusted.

[0003] According to this operation panel, when operating the operation lever, the hand is supported by the handrest, and the hand is prevented from swaying up and down during operation. Further, by attaching the handrest so that its vertical position can be adjusted, the height of the handrest is adjusted to a suitable height according to the size of the operator's hand.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The above-described conventional portable shoulder-type operation panel for a construction machine facilitates the operation of the operation lever by the operator's finger by changing the position of the handrest on which the operator places the hand according to the different hand sizes of each operator. However, in this conventional operation panel, even if the position where the operator places the hand is changed, the position and posture of the operation lever with respect to the operator do not change. Therefore, there is a problem in improving the operability according to the individuality such as different hand sizes and body sizes of each operator.

[0006] The present disclosure provides a portable operating device for a working machine capable of improving operability according to an operator who operates the working machine equipped with a working attachment.

Means for Solving the Problems

[0007] One aspect of the present disclosure is a portable operating device for a working machine equipped with a working attachment, including a housing carried by an operator when operating the working machine, a left operating lever and a right operating lever provided on the housing and operated by the operator, and an adjustment mechanism capable of adjusting at least one of the position and posture of the right operating lever and the left operating lever with respect to the operator.

Effects of the Invention

[0008] According to the above aspect, it is possible to provide a portable operating device for a working machine capable of improving operability according to an operator who operates the working machine equipped with a working attachment.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments for implementing the invention will be described with reference to the drawings.

[0011] FIG. 1 is a block diagram showing an embodiment of a portable operation device of a work machine according to the present disclosure. FIG. 2 is a top view showing an example of the portable operation device 100 of the work machine in FIG. 1. The portable operation device 100 of the work machine in the present embodiment is used for operating a work machine 200 equipped with a work attachment 260. The work machine 200 is, for example, a machine such as an excavator, a wheel loader, a forklift, or a crane that performs operations such as excavation, transportation, or lifting.

[0012] The portable operation device 100 of the work machine includes, for example, as shown in FIG. 1, a control device 110, an operation device 120, an output device 130, and a communication device 140. Further, as shown in FIG. 2, the portable operation device 100 of the work machine includes a housing 150 that an operator carries when operating the work machine 200, and a left operation lever 121L and a right operation lever 121R that are provided on the housing 150 and operated by the operator.

[0013] Although details will be described later, the portable operation device 100 of the work machine in the present embodiment is characterized by including, for example, as shown in FIG. 2, an adjustment mechanism PAM that can adjust at least one of the position and posture of the left operation lever 121L and the right operation lever 121R with respect to the operator.

[0014] The work machine 200 operated by the portable operation device 100 of the work machine includes, for example, as shown in FIG. 1, a control device 210, a communication device 220, a drive device 230, a detection device 240, an operation device 250, a work attachment 260, a traveling device 270, and a slewing device 280.

[0015] The control device 210 of the working machine 200 is, for example, one or more controllers configured by one or more microcontrollers including a central processing unit (CPU), a memory such as a RAM and a ROM, a timer, and an input / output unit. The control device 210 performs various operations and controls each part of the working machine 200 by, for example, executing a program stored in the memory by the CPU.

[0016] The communication device 220 is, for example, a wireless communication device mounted on the working machine 200. The communication device 220 is directly connected to the communication device 140 of the portable operation device 100 of the working machine via a wireless communication line, for example, and performs information communication with the communication device 140. Further, the communication device 220 may be connected to the communication device 140 of the portable operation device 100 of the working machine via a wireless base station or a wired communication line, for example, and perform information communication with the communication device 140.

[0017] The drive device 230 is controlled based on a control signal input from the control device 210, for example, and drives the work attachment 260, the traveling device 270, the slewing device 280, and the like. Specifically, the drive device 230 includes, for example, a power source such as an electric motor or an internal combustion engine, and a hydraulic pump driven by the power source.

[0018] Further, the drive device 230 includes, for example, a control valve that controls the flow rate and direction of the hydraulic oil pumped by the hydraulic pump, and a hydraulic actuator driven by the hydraulic oil supplied through the control valve. The hydraulic actuator includes, for example, a hydraulic cylinder, a hydraulic motor, and the like, and drives the work attachment 260, the traveling device 270, and the slewing device 280.

[0019] The detection device 240 includes, for example, an external sensor that detects objects around the working machine 200, and an internal sensor that detects information regarding the working machine 200. The external sensor includes, for example, a camera, LiDAR, millimeter-wave radar, ultrasonic sensor, infrared sensor, etc. The internal sensor includes, for example, a receiver of a global navigation satellite system (GNSS), a rotation speed sensor, a hydraulic sensor, an angle sensor, a stroke sensor, an acceleration sensor, etc. The detection device 240 outputs the detection result to the control device 210.

[0020] The operation device 250 is mounted, for example, in the cab of the working machine 200 and is operated by an operator who boards the cab of the working machine 200. The operation device 250 includes, for example, operation levers, operation pedals, gate lock levers, operation dials, operation buttons, operation switches, etc. installed around the driver's seat in the cab. Note that when the working machine 200 is operated only by the portable operation device 100 of the working machine, the working machine 200 may not have the operation device 250.

[0021] The work attachment 260 is a device that is driven by the drive device 230, for example, and performs a predetermined work at the work site of the working machine 200. The traveling device 270 is driven by the drive device 230, for example, and causes the working machine 200 to travel. The slewing device 280 is driven by the drive device 230 and slews the working machine 200.

[0022] When the working machine 200 is an excavator, the work attachment 260 is, for example, an excavation attachment including a boom, an arm, and a bucket. Also, the traveling device 270 is, for example, a lower traveling body including crawlers. Also, the slewing device 280 includes an inner race fixed to the lower traveling body, an outer race fixed to the upper slewing body, a ball bearing disposed between the inner race and the outer race, and a pinion meshing with the internal gear of the inner race, etc.

[0023] When the work machine 200 is a wheel loader, the work attachment 260 is, for example, an excavation attachment having a boom and a bucket. Further, the traveling device 270 includes, for example, front wheels and rear wheels attached to an articulated vehicle body in which the front part of the vehicle body tilts with respect to the rear part of the vehicle body. Further, the work machine 200 includes, for example, a steering device that tilts the front part of the vehicle body left and right with respect to the rear part of the vehicle body instead of the slewing device 280.

[0024] When the work machine 200 is a forklift, the work attachment 260 includes, for example, forks, fork rails, a backrest, a mast, lift chains, and the like. Further, the traveling device 270 includes drive wheels and steering wheels attached to the vehicle body. Further, the work machine 200 includes, for example, a steering device such as a power steering device instead of the slewing device 280.

[0025] When the work machine 200 is a crane, the work attachment 260 includes, for example, a boom, a jib, a backstop, a wire rope, a hook, and the like. Further, the traveling device 270 is, for example, a lower traveling body including crawlers. Further, the slewing device 280 includes, for example, a slewing gear, a pinion, etc. that slews an upper slewing body mounted on the lower traveling body.

[0026] As shown in FIG. 2, the housing 150 of the portable operating device 100 of the work machine has, for example, a generally rectangular parallelepiped box shape and has a generally rectangular shape in plan view as seen from above in the vertical direction. FIG. 2 shows a three-dimensional orthogonal coordinate system having an X axis parallel to the left-right direction or width direction of the housing 150, a Y axis parallel to the front-rear direction or depth direction of the housing 150, and a Z axis parallel to the height direction or thickness direction of the housing 150.

[0027] The operator who operates the portable operating device 100 of the working machine carries the housing 150 of the portable operating device 100 of the working machine such that the longitudinal direction along the long side of the rectangular housing 150 in plan view is the left - right direction and the short - hand direction along the short side is the front - back direction. Also, the operator carries the housing 150 with the central longitudinal portion of the rear end of the housing 150 corresponding to the long - side portion of the rectangular housing 150 in plan view facing the central front portion of the body.

[0028] More specifically, for example, a pair of loops 150L are provided at both left - and right - end portions of the rear end of the housing 150. The operator, for example, hangs a strap passed between the pair of loops 150L over the shoulder and carries the housing 150 with the central portion of the housing 150 located between the pair of loops 150L against the central front portion of the upper body. Inside the housing 150, for example, electronic devices including the control device 110 and the communication device 140 shown in FIG. 1, as well as a circuit board, wiring, and a battery (not shown) are accommodated.

[0029] Also, on the housing 150, for example, the operating device 120 shown in FIG. 1 is provided. The operating device 120 includes a left operating lever 121L and a right operating lever 121R. Also, the operating device 120 includes, for example, a left - front - back lever 122L, a right - front - back lever 122R, an emergency stop button 123, an operation dial 124, a plurality of operation buttons 125, and a plurality of operation switches 126.

[0030] Each part of the operating device 120 corresponds to each part of the operating device 250 mounted on the working machine 200, for example. Specifically, each part such as the left operating lever 121L, the right operating lever 121R, the left - front - back lever 122L, the right - front - back lever 122R, the emergency stop button 123, the operation dial 124, the plurality of operation buttons 125, and the plurality of operation switches 126 corresponds to each part such as the operating lever, the operation pedal, the gate lock lever, the operation dial, the operation button, and the operation switch in the cab of the working machine 200, for example.

[0031] More specifically, when the working machine 200 is a hydraulic excavator, the operation of the left operation lever 121L in the front-rear direction (Y-axis direction) corresponds to the operation of turning the upper swing body left and right. Also, the operation of the left operation lever 121L in the left-right direction (X-axis direction) corresponds to the operation of opening and closing (extending and bending) the arm of the work attachment.

[0032] Also, when the working machine 200 is a hydraulic excavator, the operation of the right operation lever 121R in the front-rear direction corresponds to the operation of raising and lowering the boom of the work attachment, respectively. Also, the operation of the right operation lever 121R in the left-right direction corresponds to the operation of opening and closing (dumping and crowding) the end attachment such as the bucket of the work attachment, respectively.

[0033] Also, when the working machine 200 is a hydraulic excavator or a crawler crane, the operation of the left front-rear lever 122L in the front-rear direction corresponds to the operation of rotating the left crawler of the lower traveling body in the forward and reverse directions, for example. Also, the operation of the right front-rear lever 122R in the front-rear direction corresponds to the operation of rotating the right crawler of the lower traveling body in the forward and reverse directions, for example.

[0034] Note that the correspondence between each lever including the above-described left operation lever 121L, right operation lever 121R, left front-rear lever 122L, and right front-rear lever 122R and the operation target of the working machine 200 is merely an example and is not particularly limited. Specifically, the correspondence between each of these levers and the operation target of the working machine 200 may be selected and switched arbitrarily from among a plurality of correspondence relationships including, for example, the JIS system.

[0035] In the portable operation device 100 of the working machine according to the present embodiment, the adjustment mechanism PAM capable of adjusting at least one of the position and posture of the left operation lever 121L and the right operation lever 121R with respect to the operator includes, for example, a telescopic mechanism EXM. The telescopic mechanism EXM is provided, for example, in the housing 150 and is configured to be able to adjust the distance S between the left operation lever 121L and the right operation lever 121R.

[0036] The housing 150 has, for example, a central portion 151, a left side portion 152, and a right side portion 153 that are divided into three parts. The left side portion 152 is arranged, for example, on the left side of the central portion 151 and is provided with a left operation lever 121L. The right side portion 153 is arranged, for example, on the right side of the central portion 151 and is provided with a right operation lever 121R.

[0037] The right end portion of the left side portion 152 is inserted into the central portion 151 from the opening at the left end of the cylindrically provided central portion 151 and is housed in a nested manner within the central portion 151. Similarly, the left end portion of the right side portion 153 is inserted into the central portion 151 from the opening at the right end of the central portion 151 and is housed in a nested manner within the central portion 151.

[0038] Thereby, the left side portion 152 of the housing 150 is provided so as to be expandable and contractible in the left - right (X - axis direction) with respect to the central portion 151 of the housing 150, as indicated by the arrow AL in FIG. 2, for example. Similarly, the right side portion 153 of the housing 150 is provided so as to be expandable and contractible in the left - right direction with respect to the central portion 151 of the housing 150, as indicated by the arrow AR in FIG. 2, for example.

[0039] That is, in the present embodiment, the expansion - contraction mechanism EXM includes, for example, a left side portion 152 provided so as to be expandable and contractible in the left - right direction with respect to the central portion 151, and a right side portion 153 provided so as to be expandable and contractible in the left - right direction with respect to the central portion 151. Further, the expansion - contraction mechanism EXM includes, for example, a stopper 154.

[0040] In the example shown in FIG. 2, the stopper 154 is composed of, for example, a bolt and a nut, or a hinge pin, etc., and is disposed at the left and right ends of the central portion 151 of the housing 150, respectively. The left stopper 154 is inserted into, for example, a through hole provided at the left end of the central portion 151 and one of a plurality of through holes provided at a predetermined interval in the left-right direction of the left side portion 152 of the housing 150 or a slit extending left and right, and restricts the expansion and contraction of the left side portion 152 with respect to the central portion 151 during attachment. Further, the right stopper 154 is inserted into, for example, a through hole provided in the central portion 151 and one of a plurality of through holes provided at a predetermined interval in the left-right direction of the right side portion 153 or a slit extending left and right, and restricts the expansion and contraction of the right side portion 153 with respect to the central portion 151 during attachment.

[0041] With such a configuration, the expansion and contraction mechanism EXM can, for example, expand and contract the left side portion 152 and the right side portion 153 left and right with respect to the central portion 151 in a state where the stopper 154 is removed or loosened, and adjust the interval S between the left operation lever 121L and the right operation lever 121R. Further, by attaching or fastening the stopper 154 after adjusting the interval S, the interval S between the left operation lever 121L and the right operation lever 121R can be fixed at an arbitrary interval S between the minimum interval Smin and the maximum interval Smax.

[0042] Note that the expansion and contraction mechanism EXM is not limited to the configuration shown in FIG. 2. The expansion and contraction mechanism EXM may be, for example, a lever position adjustment groove formed in a slit shape extending in the left-right direction of the housing 150 and supporting at least one of the left operation lever 121L and the right operation lever 121R slidably left and right with respect to the housing 150.

[0043] Also, as shown in FIG. 2, the housing 150 is provided with, for example, a bumper 160 for preventing an erroneous operation of the operation device 120 and a display device 131 constituting the output device 130 of FIG. 1. The bumper 160 has, for example, a plurality of support columns 161 erected on the left side portion 152 and the right side portion 153, and a rail portion 162 supported by the plurality of support columns 161 and provided so as to surround at least the left operation lever 121L and the right operation lever 121R.

[0044] The display device 131 includes, for example, an LED display lamp, a liquid crystal display, an organic EL display, or the like. The display device 131 displays, for example, information regarding the portable operation device 100 of the working machine or the working machine 200 and various warnings based on signals input from the control device 110.

[0045] FIG. 3 is a perspective view showing an example of the angle adjustment mechanism TM in the portable operation device 100 of the working machine according to the present embodiment. FIG. 4 is a side view for explaining the angle adjustment of the left operation lever 121L and the right operation lever 121R by the angle adjustment mechanism TM of FIG. 3.

[0046] In the portable operation device 100 of the working machine according to the present embodiment, the adjustment mechanism PAM capable of adjusting at least one of the position and posture of the left operation lever 121L and the right operation lever 121R with respect to the operator includes, for example, the angle adjustment mechanism TM. The angle adjustment mechanism TM is provided, for example, in the housing 150 and has a configuration capable of adjusting the installation angles of the left operation lever 121L and the right operation lever 121R with respect to the housing 150.

[0047] Specifically, the left operation lever 121L and the right operation lever 121R each have, for example, a lever 121a and a lever base 121b. The lever 121a is, for example, a columnar or rod-shaped member having a length in the height direction (Z-axis direction) of the housing 150 in the neutral position. The lever base 121b includes, for example, an elastic body such as a spring that supports the lever 121a so as to be tiltable, and a sensor that detects the operation direction and operation amount of the lever 121a.

[0048] The angle adjustment mechanism TM includes, for example, a fastened portion 121c and a clamp 155. The fastened portion 121c has, for example, a columnar or cylindrical shape having a central axis parallel to the left-right direction (X-axis direction) of the housing 150. The fastened portion 121c is fixed, for example, at the center of the left and right side surfaces of the lever base 121b having a substantially rectangular parallelepiped shape.

[0049] The clamp 155 is, for example, a cylindrical tubular member fixed to each of the left side portion 152 and the right side portion 153 of the housing 150, and has an inner diameter into which the fastened portion 121c can be inserted in the axial direction. The clamp 155 has, for example, a slit 155a provided along the axial direction of the cylindrical outer peripheral wall and a fastening screw 155b penetrating the outer peripheral wall in the radial direction.

[0050] The clamp 155, for example, elastically deforms when the fastening screw 155b is fastened, so that the width of the slit 155a is reduced and the inner diameter is reduced. Further, the clamp 155, for example, the elastic deformation is restored when the fastening screw 155b is relaxed, so that the width of the slit 155a is enlarged and the inner diameter is enlarged.

[0051] With such a configuration, the clamp 155 rotatably supports the fastened portion 121c when relaxed and fastens and fixes the fastened portion 121c when fastened. Thereby, as shown in FIG. 4, the angle adjustment mechanism TM can adjust the installation angles of the left operation lever 121L and the right operation lever 121R with respect to the housing 150.

[0052] Specifically, the angle adjustment mechanism TM can adjust, for example, the inclination angle of the central axis A of the lever 121a with respect to the height direction of the housing 150 in a plane (YZ plane) parallel to the front-rear direction and the height direction of the housing 150 in a state where the lever 121a is in the neutral position with respect to the lever base portion 121b. The inclination angle of the central axis A of the lever 121a with respect to the height direction of the housing 150 is adjusted, for example, within a predetermined angle range θyz centered on the central axis of the fastened portion 121c.

[0053] FIG. 5 is a side view for explaining a modification of the angle adjustment mechanism TM of FIG. 3. In the modification shown in FIG. 5, the angle adjustment mechanism TM includes a fastened portion 121d and a clamp 156. The fastened portion 121d is, for example, a spherical ball and is fixed to the center of the bottom surface of the lever base portion 121b having a rectangular parallelepiped shape of the left operation lever 121L and the right operation lever 121R.

[0054] The clamp 156 is, for example, a concave container-shaped member having a hemispherical concave portion and a cylindrical portion with an inner diameter corresponding to the outer diameter of the spherical fastened portion 121d. The clamp 156 is fixed to each of the left side portion 152 and the right side portion 153 of the housing 150, and houses at least a part of the spherical fastened portion 121d. The clamp 156 has, for example, a slit 156a, a fastening tab 156b, a fastening screw 156c, and a fastening stem 156d.

[0055] The slit 156a extends, for example, from the bottom to the upper opening of the clamp 156 along a plane (XZ plane) parallel to the height direction of the housing 150. The fastening tabs 156b are provided on both sides in the width direction of the slit 156a, and protrude radially outward from the outer peripheral surface of the clamp 156. The fastening screws 156c are screwed into screw holes provided in the fastening tabs 156b on both sides of the slit 156a.

[0056] One end of the fastening stem 156d is fixed to the head of the fastening screw 156c and extends in the axial direction of the fastening screw 156c. The fastening stem 156d has, for example, a fastening lever or a fastening knob (not shown) at the other end opposite to the one end fixed to the fastening screw 156c. Note that the configuration of the angle adjustment mechanism TM is not limited to the configuration shown in FIG. 5.

[0057] When fastening the clamp 156, for example, rotate the fastening lever or the fastening knob of the fastening stem 156d, and screw the fastening screw 156c into the screw holes of the fastening tabs 156b provided on both sides of the slit 156a through the fastening stem 156d. As a result, the clamp 156 is elastically deformed, the width of the slit 156a is reduced, and the diameter of the clamp 156 is reduced.

[0058] When loosening the clamp 156, for example, rotate the fastening lever or the fastening knob of the fastening stem 156d in the direction opposite to the fastening direction, and loosen the fastening screw 156c screwed into the screw holes of the fastening tabs 156b. As a result, the elastic deformation of the clamp 156 is restored, the width of the slit 156a is enlarged, and the diameter of the clamp 156 is enlarged.

[0059] With such a configuration, the clamp 156 rotatably supports the clamped portion 121d during relaxation and clamps and fixes the clamped portion 121d during fastening. Thereby, as shown in FIG. 5, the angle adjustment mechanism TM can adjust the installation angles of the left operation lever 121L and the right operation lever 121R with respect to the housing 150.

[0060] Specifically, for example, the angle adjustment mechanism TM can adjust the inclination angle of the central axis A of the lever 121a with respect to the height direction of the housing 150 to an arbitrary angle within an arbitrary plane parallel to the height direction of the housing 150 in a state where the lever 121a is in the neutral position. Note that the inclination angle of the central axis A of the lever 121a with respect to the height direction (Z-axis direction) of the housing 150 is adjusted, for example, within a predetermined angle range θ centered on the center of the clamped portion 121d.

[0061] FIG. 6 is a perspective view showing an example of the lever length adjustment portion LAP in the portable operation device 100 of the working machine in FIG. 1. In the portable operation device 100 of the working machine according to the present embodiment, the adjustment mechanism PAM capable of adjusting at least one of the position and posture of the left operation lever 121L and the right operation lever 121R with respect to the operator includes, for example, the lever length adjustment portion LAP. The lever length adjustment portion LAP is configured to be able to change the length L of the left operation lever 121L and the right operation lever 121R.

[0062] The lever length adjustment portion LAP is, for example, a telescopic mechanism ECM provided on each of the left operation lever 121L and the right operation lever 121R. In the example shown in FIG. 6, the telescopic mechanism ECM is constituted by, for example, a telescopic mechanism having a base portion 121a1, an intermediate portion 121a2, and a tip portion 121a3 that constitute the lever 121a.

[0063] The base portion 121a1 is tiltably supported by the lever base portion 121b. The intermediate portion 121a2 has, for example, an inner diameter capable of accommodating the base portion 121a1, and houses the base portion 121a1 in a nested manner. The tip portion 121a3 has, for example, an inner diameter capable of accommodating the intermediate portion 121a2, and houses the intermediate portion 121a2 in a nested manner. Note that the telescopic mechanism ECM may have a plurality of nested intermediate portions 121a2.

[0064] Between the base portion 121a1 and the intermediate portion 121a2, and between the intermediate portion 121a2 and the tip portion 121a3, there are provided anti-disengagement mechanisms that engage with each other when the telescopic mechanism ECM extends. Further, the base portion 121a1 and the intermediate portion 121a2 are provided with, for example, stoppers having hemispherical tip portions that protrude from the outer peripheral surface and are biased radially outward. Also, the intermediate portion 121a2 and the tip portion 121a3 each have an engagement hole for engaging with the stoppers of the base portion 121a1 and the intermediate portion 121a2.

[0065] With such a configuration, an operator who wants to shorten the length L of the left operation lever 121L and the right operation lever 121R can, for example, axially push in the tip portion 121a3 of the lever 121a that constitutes the telescopic mechanism ECM. Thereby, as shown in FIG. 6, the operator can contract the length L of the lever 121a from the maximum length Lmax to the minimum length Lmin.

[0066] Also, an operator who wants to extend the length L of the left operation lever 121L and the right operation lever 121R can, for example, axially pull up the tip portion 121a3 of the lever 121a that constitutes the telescopic mechanism ECM. Thereby, as shown in FIG. 6, the operator can extend the length L of the left operation lever 121L and the right operation lever 121R from the minimum length Lmin to the maximum length Lmax.

[0067] Note that the telescopic mechanism ECM may be configured to be able to adjust the length L of the left operation lever 121L and the right operation lever 121R in multiple steps or steplessly between the minimum length Lmin and the maximum length Lmax, for example, by using adjustment pins or adjustment screws.

[0068] FIG. 7 is a perspective view showing another example of the lever length adjustment unit LAP in the portable operation device 100 of the working machine in FIG. 1. In the example shown in FIG. 7, the lever length adjustment unit LAP includes an extension part 121a5 that can be attached to and detached from each of the left operation lever 121L and the right operation lever 121R.

[0069] Specifically, in the example shown in FIG. 7, the lever 121a of the left operation lever 121L and the right operation lever 121R has, for example, a support part 121a4, an extension part 121a5, and a fixing screw 121a6.

[0070] The support part 121a4 is a rod-shaped or cylindrical member that is tiltably supported by the lever base 121b, and is provided with a screw hole for screwing in the fixing screw 121a6.

[0071] The extension part 121a5 is, for example, a rod-shaped or cylindrical member having a predetermined length and attached to the lever base 121b. In order to adjust the length L of the left operation lever 121L and the right operation lever 121R to an arbitrary length, for example, a plurality of extension parts 121a5 having different lengths are prepared. The extension part 121a5 has, for example, an insertion hole for inserting the support part 121a4 and a through hole for inserting the fixing screw 121a6.

[0072] With such a configuration, an operator who adjusts the length L of the left operation lever 121L and the right operation lever 121R can, for example, select an extension part 121a5 having a length suitable for his / her operation from among a plurality of extension parts 121a5 having different lengths. Further, the operator inserts the support part 121a4 into the insertion hole of the selected extension part 121a5, aligns the positions of the through hole of the extension part 121a5 and the screw hole of the support part 121a4, and screws the fixing screw 121a6 inserted through the through hole of the extension part 121a5 into the screw hole of the support part 121a4. Thereby, an extension part 121a5 having an arbitrary length can be fixed to the support part 121a4, and the length L of the left operation lever 121L and the right operation lever 121R can be adjusted to an arbitrary length.

[0073] As described above, the portable operation device 100 of the work machine according to this embodiment is a device for operating the work machine 200 equipped with the work attachment 260. The portable operation device 100 of the work machine includes a housing 150 that an operator carries when operating the work machine 200, and a left operation lever 121L and a right operation lever 121R that are provided on the housing 150 and operated by the operator. And the portable operation device 100 of the work machine includes an adjustment mechanism PAM that can adjust at least one of the position and posture of these left operation lever 121L and right operation lever 121R with respect to the operator.

[0074] With such a configuration, according to the portable operation device 100 of the work machine of this embodiment, at least one of the position and posture of the left operation lever 121L and the right operation lever 121R can be adjusted by the adjustment mechanism PAM according to the individuality such as the size of the operator's hand and body. Therefore, according to the portable operation device 100 of the work machine of this embodiment, it is possible to improve the operability according to the operator who operates the work machine 200 equipped with the work attachment 260.

[0075] Further, in the portable operation device 100 of the work machine of this embodiment, the adjustment mechanism PAM includes a telescopic mechanism EXM provided on the housing 150 and capable of adjusting the distance S between the left operation lever 121L and the right operation lever 121R.

[0076] With such a configuration, by using the telescopic mechanism EXM, the distance S between the left operation lever 121L and the right operation lever 121R can be adjusted according to the individuality such as the size of the operator's hand and body. As a result, the positions of the left operation lever 121L and the right operation lever 121R with respect to the operator can be adjusted according to the individuality of the operator, and the operability of the portable operation device 100 of the work machine can be improved.

[0077] Further, in the portable operation device 100 of the work machine of this embodiment, the adjustment mechanism PAM includes an angle adjustment mechanism TM provided on the housing 150 and capable of adjusting the installation angles of the left operation lever 121L and the right operation lever 121R with respect to the housing 150.

[0078] With such a configuration, an operator who operates the portable operating device 100 of the working machine can use the angle adjustment mechanism TM to adjust the installation angles of the left operation lever 121L and the right operation lever 121R with respect to the housing 150 according to their own individuality such as the size of their hands and body. As a result, the postures of the left operation lever 121L and the right operation lever 121R with respect to the operator can be adjusted according to the individuality of the operator, and the operability of the portable operating device 100 of the working machine can be improved.

[0079] Further, in the portable operating device 100 of the working machine according to the present embodiment, the adjustment mechanism PAM includes a lever length adjustment portion LAP that can change the lengths L of the left operation lever 121L and the right operation lever 121R.

[0080] With such a configuration, an operator who operates the portable operating device 100 of the working machine can use the lever length adjustment portion LAP to adjust the lengths L of the left operation lever 121L and the right operation lever 121R according to their own individuality such as the size of their hands and body. As a result, the positions of the tips of the left operation lever 121L and the right operation lever 121R with respect to the operator can be adjusted according to the individuality of the operator, and the operability of the portable operating device 100 of the working machine can be improved.

[0081] Further, in the portable operating device 100 of the working machine according to the present embodiment, the housing 150 has a central portion 151, a left side portion 152 disposed on the left side of the central portion 151 and provided with the left operation lever 121L, and a right side portion 153 disposed on the right side of the central portion 151 and provided with the right operation lever 121R. Further, the telescopic mechanism EXM includes a left side portion 152 provided so as to be telescopically movable left and right with respect to the central portion 151, and a right side portion 153 provided so as to be telescopically movable left and right with respect to the central portion 151.

[0082] With such a configuration, an operator who operates the portable operating device 100 of the working machine can expand and contract the left side portion 152 and the right side portion 153 with respect to the central portion 151 to adjust the distance S between the left operation lever 121L and the right operation lever 121R. Also, the distances from the center in the left-right direction of the housing 150 to the left operation lever 121L and the right operation lever 121R can be made equal. Thereby, with the operator aligning the center position of the body with the center in the left-right direction of the housing 150, the distances from the center position of the operator's body to the left operation lever 121L and the right operation lever 121R can be made equal. As a result, the operability of the portable operating device 100 of the working machine by the operator can be improved.

[0083] Further, in the portable operating device 100 of the working machine according to the present embodiment, the left operation lever 121L and the right operation lever 121R each have a lever 121a and a lever base 121b. The lever base 121b supports the lever 121a so as to be tiltable and detects the operation direction and operation amount of the lever 121a. Also, the angle adjustment mechanism TM includes fastened portions 121c, 121d fixed to the lever base 121b, and clamps 155, 156 that rotatably support the fastened portions 121c, 121d when relaxed and fasten and fix the fastened portions 121c, 121d when fastened.

[0084] With such a configuration, in a state where the clamps 155, 156 of the angle adjustment mechanism TM are relaxed, the fastened portions 121c, 121d can be rotated with respect to the clamps 155, 156. Thereby, the installation angles of the levers 121a of the left operation lever 121L and the right operation lever 121R with respect to the height direction of the housing 150 can be adjusted to arbitrary angles. Also, after adjusting the installation angle of the lever 121a, by fastening and fixing the fastened portions 121c, 121d with the clamps 155, 156, the installation angle of the lever 121a can be fixed at an arbitrary angle after adjustment.

[0085] In addition, in the portable operation device 100 of the working machine according to the present embodiment, the lever length adjustment unit LAP is a telescopic mechanism ECM provided on each of the left operation lever 121L and the right operation lever 121R.

[0086] With such a configuration, an operator who operates the portable operation device 100 of the working machine can extend and contract the length L of each of the left operation lever 121L and the right operation lever 121R by extending and contracting the telescopic mechanism ECM. As a result, the operator can adjust the length L of the left operation lever 121L and the right operation lever 121R to an arbitrary length suitable for the size of their own hand and body size. As a result, the operability of the portable operation device 100 of the working machine can be improved.

[0087] In addition, in the portable operation device 100 of the working machine according to the present embodiment, the lever length adjustment unit LAP includes an extension part 121a5 that can be attached to and detached from each of the left operation lever 121L and the right operation lever 121R.

[0088] With such a configuration, an operator who operates the portable operation device 100 of the working machine can replace the extension part 121a5 of the left operation lever 121L and the right operation lever 121R with an extension part 121a5 of an arbitrary length suitable for the size of their own hand and body size. Therefore, the operability of the portable operation device 100 of the working machine can be improved.

[0089] As described above, according to the above-described embodiment, it is possible to provide a portable operation device 100 for a working machine that can improve the operability according to an operator who operates the working machine 200 equipped with the work attachment 260.

[0090] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments. Various modifications or substitutions can be applied to the above-described embodiments without departing from the scope of the present invention. In addition, the features described separately can be combined as long as there is no technical contradiction.

Explanation of reference numerals

[0091] Portable operating device for a 100 work machine 121a Lever 121a5 Extension part 121b Lever base 121c Fastened part 121d Fastened part 121L Left operating lever 121R Right operating lever 150 Housing 151 Central part 152 Left side part 153 Right side part 155 Clamp 156 Clamp 200 Work machine 260 Work attachment ECM telescopic mechanism (lever length adjustment part) EXM telescopic mechanism (adjustment mechanism) LAP lever length adjustment part (adjustment mechanism) PAM adjustment mechanism S Interval TM angle adjustment mechanism (adjustment mechanism)

Claims

1. A portable operating device for a work machine equipped with a work attachment, a housing carried by an operator during operation of the work machine, a left operation lever and a right operation lever provided on the housing and operated by the operator, and an adjustment mechanism capable of adjusting at least one of the position and posture of the left operation lever and the right operation lever with respect to the operator. A portable operating device for a work machine.

2. The adjustment mechanism includes a telescopic mechanism provided on the housing and capable of adjusting the distance between the left operation lever and the right operation lever. The portable operating device for a work machine according to claim 1.

3. The adjustment mechanism includes an angle adjustment mechanism provided on the housing and capable of adjusting the installation angles of the left operation lever and the right operation lever with respect to the housing. The portable operating device for a work machine according to claim 1.

4. The adjustment mechanism includes a lever length adjustment part capable of changing the lengths of the left operation lever and the right operation lever. The portable operating device for a work machine according to claim 1.

5. The housing has a central part, a left side part arranged on the left side of the central part and provided with the left operation lever, and a right side part arranged on the right side of the central part and provided with the right operation lever. The telescopic mechanism includes a left side part provided so as to be telescopically movable left and right with respect to the central part, and a right side part provided so as to be telescopically movable left and right with respect to the central part. The portable operating device for a work machine according to claim 2.

6. Each of the left operation lever and the right operation lever has a lever and a lever base that tiltably supports the lever and detects the operation direction and operation amount of the lever. The angle adjustment mechanism includes a fastened portion fixed to the lever base, and a clamp that rotatably supports the fastened portion during relaxation and fastens and fixes the fastened portion during fastening. The portable operating device for a working machine according to claim 3.

7. The lever length adjustment portion is a telescopic mechanism provided on each of the left operation lever and the right operation lever. The portable operating device for a working machine according to claim 4.

8. The lever length adjustment portion includes an extension portion that can be attached to and detached from each of the left operation lever and the right operation lever. The portable operating device for a working machine according to claim 4.

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