JP5919305B2 - Operation equipment for work machines - Google Patents

Description

  The present invention relates to, for example, a double-arm type work machine having two front work machines independently provided at a front portion of a vehicle body, and more particularly to an operation device for independently operating these front work machines. It is.

  Such a double-armed work machine has operating devices on both sides of the driver's seat, and an operator sitting in the driver's seat operates the right operating device with his right hand and the left operating device with his left hand. By doing so, the two front work machines can be operated independently and simultaneously (Patent Document 1, etc.).

  This operating device has a structure in which an operating arm having an armrest is attached to an operating arm bracket provided on the side of the driver's seat so that the operating arm can swing left and right, and an operating lever is attached to the tip of the operating arm in a horizontal state. It has become. Then, while the operator sitting in the driver's seat holds the elbow on the armrest, this operator lever is gripped by one palm and moved up and down and up and down, and the switch provided on the operator lever is operated, Each front work machine can be finely operated by swinging the operation arm left and right with the elbow.

JP 2006-252224 A JP 2005-171510 A Japanese Patent Laid-Open No. 9-13425

  By the way, in the operation device as shown in the above-mentioned Patent Document 1, in order to facilitate the operation by the palm, the operation lever is positioned in a horizontal state in front of the chest or abdomen of the operator seated in the driver's seat. Yes. However, if the operation lever is positioned in such a state, when the operator gets into and out of the driver's seat, the operator contacts the body of the operator, and the operation lever at that position gets in the way.

  Therefore, for example, as shown in Patent Document 2, the operation lever can be turned up and down at the base bracket portion, and the operation lever can be turned from the horizontal position to the vertical state so as not to disturb getting on and off. A structure to do so is also conceivable. However, in such a structure, there is a concern that the structure of the bracket portion at the base of the operation lever is complicated and the mass of the portion increases, and the operability is deteriorated.

  Further, as in Patent Document 3, it is also conceivable to rotate the entire operation arm together with the operation lever so as to jump up to the rear of the driver's seat. However, since the operation lever is positioned in front of the operator as described above, there is a possibility that this portion may come into contact with the face of the operator just by flipping up as it is.

  Therefore, the present invention has been devised to solve these problems, and an object of the present invention is to provide a novel operating device for a working machine that does not get in the way when an operator gets on and off the driver's seat. .

  In order to solve the above-mentioned problem, the first invention is an operating device for a work machine located from the side of the driver's seat to the front to operate the front work machine, wherein the floor of the driver's seat is An operating arm bracket extending upward from the side, an operating arm extending from the operating arm bracket in the front-rear direction of the driver's seat, and an operating lever extending horizontally from the tip of the operating arm toward the driver's seat, An operating device for a working machine, characterized in that a bracket is rotatably provided on a floor surface of the driver's seat side portion or on a pedestal installed on the floor surface via a rotating shaft portion.

  According to such a configuration, the operation arm bracket located on the side portion of the driver seat can be turned away from the driver seat about the rotary shaft portion located at the lower end thereof. As a result, the operating arm and operating lever located from the side of the driver's seat to the front of the driver's seat move so that they can be lifted from the driver's seat. These do not get in the way. Further, since the structure of the bracket portion at the base of the operation lever is not changed, the operability is not deteriorated due to the increase in the mass of the portion.

  In a second aspect based on the first aspect, the rotary shaft portion is an operating device for a work machine in which the rotary shaft is positioned in parallel with the front-rear direction of the driver seat. According to such a configuration, the operation arm bracket provided with the operation arm and the operation lever can be rotated substantially sideways so as to be separated from the driver's seat with the rotary shaft portion positioned at the lower end as an axis.

  According to a third invention, in the first invention, the rotary shaft portion is an operating device for a work machine in which the rotary shaft is located obliquely with respect to the front-rear direction of the driver seat. According to such a configuration, the operation arm bracket including the operation arm and the operation lever can be rotated obliquely rearward so as to be separated from the driver's seat with the rotary shaft portion positioned at the lower end thereof as an axis.

  According to a fourth aspect of the present invention, in the first to third aspects, when the operation arm bracket is erected, the lower end of the operation arm bracket is supported on the floor surface of the driver's seat side portion or on a pedestal installed on the floor surface. An operating device for a work machine comprising: a stopper; and an upper stopper for restricting a rotation amount of the operating arm bracket when the operating arm bracket is rotated away from the driver's seat with the rotating shaft portion as an axis.

  According to such a configuration, the amount of rotation of the operation arm bracket can be regulated within a certain range, so when the operation arm bracket rotates, the operation arm or Prevents contact and collision of the operating lever.

  In a fifth aspect based on the fourth aspect, when the upper stopper rotates the operation arm bracket away from the driver's seat with the rotary shaft portion as an axis, the left and right directions of the operation lever are rotated. The operating device of the working machine is arranged such that the maximum movement amount is larger than the overlapping length of the operation lever and the driver seat in the left-right direction when the driver seat is viewed from the front. According to such a configuration, in addition to the effect of the fourth aspect of the invention, the operation lever moves so as to be located outside the driver's seat when rotating, so that the operator contacts the operation lever when getting on and off the driver's seat. This can be avoided more reliably.

  A sixth invention is the work machine according to the fourth or fifth invention, wherein a jump spring is bridged between the operation arm bracket and a floor surface of the driver's seat side portion or a mount installed on the floor surface. The operating device. According to such a configuration, the operating arm bracket is supported by the lower stopper by the urging force of the jump spring (standing state) or is in contact with the upper stopper (rotated state). The state can be maintained. As a result, the operating arm bracket does not wobble and a stable posture can be maintained.

  According to a seventh invention, in the first to sixth inventions, the lock switch that is turned on or off when the operation arm bracket is raised and turned off or on when the operation arm bracket is rotated to be tilted. And a control device that controls transmission of a detection signal in conjunction with turning on and off of the lock switch.

  With such a configuration, the control device can switch between enabling and disabling the transmission of the detection signal of the work machine in conjunction with the turning on and off of the lock switch. Even when the operation lever is touched, it is possible to reliably prevent the work machine from malfunctioning.

  According to the present invention, the operation arm bracket is provided on the floor surface of the driver's seat side portion or on the pedestal installed on the floor surface via the rotating shaft portion extending in the front-rear direction or the oblique direction of the driver's seat. The operation arm bracket located on the side of the vehicle can be turned away from the driver's seat with the rotating shaft at the lower end as an axis. As a result, the operating arm and the operating lever located from the side of the driver's seat to the front are separated so that they can be lifted up from the driver's seat. These do not get in the way.

1 is an overall side view showing an embodiment of a double-armed hydraulic excavator that is one of work machines 200 to which an operating device 100 according to the present invention is applied. 1 is an overall plan view showing an embodiment of a double-armed hydraulic excavator that is one of work machines 200 to which an operating device 100 according to the present invention is applied. It is a perspective view which shows 1st Embodiment of the operating device 100 which concerns on this invention. It is a top view which shows 1st Embodiment of the operating device 100 which concerns on this invention. It is a front view which shows 1st Embodiment of the operating device 100 which concerns on this invention. It is a top view which shows the state which bounced up the operating device 100b which concerns on 1st Embodiment. It is a front view which shows the state which bounced up the operating device 100b which concerns on 1st Embodiment. It is a perspective view which shows 2nd Embodiment of the operating device 101 which concerns on this invention. It is a side view which shows 2nd Embodiment of the operating device 101 which concerns on this invention. It is a top view which shows 2nd Embodiment of the operating device 101 which concerns on this invention. It is a front view which shows 2nd Embodiment of the operating device 101 which concerns on this invention. It is a side view which shows the state which bounced up the operating device 101b which concerns on 2nd Embodiment. It is a top view which shows the state which bounced up the operating device 101b which concerns on 2nd Embodiment. It is a front view which shows the state which bounced up the operating device 101b which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the control apparatus 61, and the flow of a detection signal. It is operation | movement explanatory drawing of the operating device 100 which concerns on this invention. It is operation | movement explanatory drawing of the front work machine of the working machine 200 which concerns on this invention.

(First embodiment)
Hereinafter, a first embodiment of a work machine operating device according to the present invention will be described with reference to the drawings.
<Work machine>
1 and 2 show the appearance of a double-armed hydraulic excavator, which is an example of a work machine 200 equipped with an operating device according to the present invention. FIG. 1 shows the entire side surface of the double-armed hydraulic excavator. FIG. 2 is an overall plan view of the double-armed hydraulic excavator.

<Overall configuration of work machine>
As shown in the figure, the work machine (hydraulic excavator) 200 includes a lower vehicle body 2 including a traveling body 1 and an upper revolving body 3 that is turnably mounted on the lower vehicle body 2. A driver's cab 4 is provided in the vicinity of the front center of the upper swing body 3, and an engine compartment 5 in which an engine, a hydraulic pump, etc. (not shown) are accommodated, a counterweight 8, and the like are provided in the rear part. Further, a first front work machine A and a second front work machine B which are swingable in the vertical and horizontal directions are attached to the left and right of the front part of the upper swing body 3.

<Configuration of front work machine>
The first front work machine A includes a first bracket 6a provided on the right side of the front portion of the upper swing body 3, a swing post 7a attached to the first bracket 6a so as to be swingable left and right around the vertical axis, and the swing. A boom 10a attached to the post 7a so as to be swingable up and down, an arm 12a attached to the boom 10a so as to be swingable up and down, and a work tool 20a such as a grapple attached to the arm 12a so as to be rotatable up and down. have.

  The first front work machine A also includes a swing post cylinder 9a that swings the swing post 7a in the horizontal direction around the vertical axis, a boom cylinder 11a that swings the boom 10a in the vertical direction, and an arm 12a that moves in the vertical direction. An arm cylinder 13a that swings in the vertical direction, and a work tool cylinder 15a that rotates the work tool 20a in the vertical direction. The work tool 20a can be arbitrarily replaced with any one of a grapple, a cutter, a breaker, a bucket, and other work tools as illustrated in accordance with the work content of the work machine.

  On the other hand, the second front work machine B is provided on the left side of the front part of the upper swing body 3 and has the same configuration as the first front work machine A described above. In the figure, the same constituent members are indicated by changing the subscripts from “a” to “b”, and the description is omitted here.

<Configuration of operation device>
3 to 5 show an embodiment of the operating device 100 according to the present invention. Reference numeral 50 in each figure denotes a driver seat installed in the cab 4 facing the front of the vehicle body. Operation devices 100a and 100b according to the present invention are provided on the left and right sides of the driver seat 50, respectively. The operating device 100a provided on the right side of the driver seat 50 operates the first front work machine A, and the operating device 100b provided on the left side of the driver seat 50 operates the second front work machine B. .

  First, the operating device 100a located on the right side of the driver seat 50 includes an operating arm bracket 51a provided vertically on the right side of the driver seat 50, an operating arm 52a provided on the operating arm bracket 51a, and this operation. The arm rest 53a provided on the arm 52a and an operation lever 54a provided at the tip of the operation arm 52a are mainly configured.

  The operation arm 52a instructs the first front work machine A to swing left and right, and is attached to the operation arm bracket 51a so as to be swingable left and right around its swing center axis 73a. The operation arm bracket 51a is provided with an operation arm displacement detector 57a. The operation arm bracket 51a detects a swing displacement amount of the operation arm 52a and transmits a detection signal to a control device 61 described later (FIG. 15). . The operation arm bracket 51a is provided with an elbow joint position adjusting device (not shown) for adjusting the position of the elbow joint support portion 77a in accordance with the body shape of the operator.

  The armrest 53a has an elbow joint support 77a where the operator's elbow joint is located. The armrest 53a and the operation arm 52a are attached to the operation arm bracket 51a so that the elbow joint support portion 77a is positioned on the swing center axis 73a of the operation arm 52a.

  The operation lever 54a is for instructing the operation of the work tool 20a of the first front work machine A, and is placed horizontally so as to extend horizontally to the inner side (driver's seat side) of the tip of the operation arm 52a. It is attached to the upper and lower and front and rear to be rotatable. Around the operation lever 54a, a work tool turning lever 55a for instructing turning of the work tool 20a is attached so as to be rotatable about its axis. Further, a work tool operation switch 56a for instructing start / stop of the work tool 20a is provided at the tip of the operation lever 54a.

  The operating arm 52a includes an operating lever vertical displacement detector 581a for detecting the vertical displacement amount of the operating lever 54a, and an operating lever longitudinal displacement detector for detecting the longitudinal displacement amount of the operating lever 54a. 582a, a rotation lever displacement detector 59a for detecting the rotational displacement amount of the work tool rotating lever 55a, and an operation switch displacement detector 60a for detecting the displacement amount of the work tool operation switch 56a are provided. Detection signals detected by the respective detectors are transmitted to a control device 61 (FIG. 15) described later.

  On the other hand, the operating device 100b located on the left side of the driver seat 50 also includes an operating arm bracket 51b provided on the left side of the driver seat 50, and an operating arm 52b provided on the upper end of the operating arm bracket 51b. The arm rest 53b provided in the operation arm 52b and an operation lever 54b provided at the tip of the operation arm 52b are mainly configured. These structural members, their functions, detectors, and the like are the same as those of the operating device 100a located on the right side of the driver's seat 50, and the same members are indicated by substituting the suffixes “a” to “b”. The description is omitted. However, the operating device 100b is different in that it further has a jumping mechanism and is installed on the floor surface F on the left side of the driver's seat 50 via the jumping mechanism.

<Jump mechanism>
In this jumping mechanism, a support bracket 80 that extends downward integrally with the operation arm bracket 51 b is provided on a pedestal 82 that is installed on the floor surface F on the right side of the driver's seat 50 via a rotating shaft portion 81. It has a configuration. The rotating shaft 81 includes a horizontal bracket 83 extending horizontally outward from the lower end of the support bracket 80, a vertical bracket 84 extending vertically from the mount 82, an upper end of the vertical bracket 84, and a horizontal end of the horizontal bracket 83. Between the rotary shaft 85 that pivotally supports the driver's seat 50 in the front-rear direction, the locking pin 86 provided on the operation arm bracket 51b side, and the locking pin 87 provided on the vertical bracket 84 side. A lifting spring (coil spring) 88 is included.

  A lower stopper 89 that supports the lower end of the support bracket 80 and an upper stopper 90 that can come into contact with the outer surface of the operation arm bracket 51b are provided on the gantry 82. The movable range (rotation amount) of the operation arm bracket 51b is regulated by the lower stopper 89 and the upper stopper 90.

<Operation of the lifting mechanism>
FIG. 6 is a plan view showing a state in which the operating device 100b including the operating arm bracket 51b is flipped up laterally outside the driver's seat 50, and FIG. 7 is a front view thereof. According to the jumping mechanism configured as described above, if the operation arm bracket 51b of the operation device 100b located on the left side of the driver's seat 50 is pushed to the left side of the driver's seat 50 with an elbow or an arm as it is, this operation is performed. The entire operating device 100b including the arm bracket 51b is pivoted to the side so as to fall down from the driver's seat 50 as it is, with the rotation shaft 85 of the rotation shaft portion 81 of the jumping mechanism as an axis. As a result, the operating arm 52b and the operating lever 54b of the operating device 100b move away from the driver's seat 50, so that the space around the operator, particularly the space in front of the driver's seat, becomes wider and the driver's seat 50 can be easily boarded and exited. Become.

  That is, since the rotation shaft 85 of the rotation shaft portion 81 is positioned so as to extend in the front-rear direction in parallel with the driver's seat 50, the entire operation device 100b including the operation arm bracket 51b has the rotation shaft 85 as an axis. When it rotates, the operating lever 54b of the operating device 100b moves to the left outside of the driver's seat 50 by the moving amount L2, as shown in FIGS. As shown in FIGS. 4 and 5, when the horizontal distance between the operating levers 54a and 54b of the left and right operating devices 100a and 100b in the operating state is La, the operating lever 54b is moved up by flipping up one operating device 100b. The distance between the operation levers 54a and 54b in the horizontal direction is increased by L2 to Lb as shown in FIGS.

  In the present embodiment, the driver's seat 50 is used as a reference as a method for determining the left and right outer movement amount L2 of the operation lever 54b by jumping up. That is, as shown in FIG. 5, when the overlap length in the left and right direction of the operation lever 54b and the driver seat 50 is L3 when the driver's seat 50 is viewed from the front, the maximum amount of movement of the operation lever 54b in the left and right direction due to jumping is shown. L2 is set to satisfy L2> L3. By doing so, since the operation lever 54b moves so as to be positioned outside the driver's seat 50 when the operating device 100b is raised, the operator can control the movable range (rotation amount) of the operation arm bracket 51b. It is possible to more reliably avoid contact with the operation lever 54b when getting on and off the driver seat 50.

  Further, since the lower stopper 89 and the upper stopper 90 are provided on the stand 82 of the jumping mechanism as described above, the lower end of the support bracket 80 comes into contact with the lower stopper 89 and stands vertically. When in the state, the operating device 100b including the operating arm bracket 51b can be prevented from rotating (approaching) to the driver seat 50 side. On the contrary, when the entire operation device 100b including the operation arm bracket 51b is rotated (leaves) outside the driver's seat 50 about the rotation shaft 85 of the rotation shaft portion 81, the outer surface of the operation arm bracket 51b is moved to the upper stopper 90. Therefore, it is possible to prevent the entire operating device 100b including the operating arm bracket 51b from rotating (leaving) outward. As a result, it is possible to avoid contact and collision of the operation arm 52b, the operation lever 54b, and the like with the driver's seat 50 or a device or wall (not shown) on the left side thereof.

  As shown in FIG. 5, when the operation arm bracket 51 b is standing (positioned in the vicinity of the driver's seat 50), the jump spring (coil spring) 88 is positioned inside the rotary shaft 85. The standing state can be maintained by the biasing force of the spring 88 in the contraction direction. On the contrary, as shown in FIG. 7, when the operation arm bracket 51b is tilted and is in contact with the upper stopper 90, the jump spring 88 is positioned outside the rotating shaft 85. The collapsed state of the spring 88 can be maintained by the urging force in the contraction direction. As a result, in any state, the operating device 100b including the operating arm bracket 51b does not easily wobble or fall down, and a stable posture can be maintained.

<Modification>
As a modification of the present embodiment, for example, as shown in FIGS. 5 to 7, a lock switch 91 is provided in the driver's seat 50 or the support bracket 80, and the support bracket 80 is moved inward to raise the operation arm bracket 51b. The lower end bracket 80 comes into contact with the tip of the lock switch 91 to turn it on (or off), and when the support bracket 80 is tilted, the lock switch 91 turns off (or on). It is good also as a structure. If the operation of the work machine 200 is switched between valid and invalid in conjunction with the on / off of the lock switch 91, the operator erroneously operates when getting on and off the driver's seat 50 with the operating device 100b being flipped up. Even when the lever 54b is touched, the work machine 200 can be prevented from malfunctioning.

  In the present embodiment, the operation device 100b on the left side of the driver's seat 50 is provided with a flip-up mechanism so that only the operation device 100b jumps up. However, on the contrary, only the operating device 100a on the right side of the driver's seat 50 may jump up, or both the operating devices 100a and 100b may jump up. However, in general, the operator's cab 4 of the excavator 200 is often provided with doors for the operator to enter and exit only on either the left or right side of the driver's seat 50. In view of the above, it is preferable to adopt a configuration in which only the operation device 100b on which the door is provided jumps up. Moreover, although each member which comprises this raising mechanism was provided on the mount frame 82 installed on the floor surface F of the cab 4, you may provide directly on the floor surface F. FIG.

(Second Embodiment)
Next, a second embodiment according to the present invention will be described. 8 to 14 show a second embodiment of the operating device 101 according to the present invention. Each of these drawings corresponds to FIGS. 3 to 7 according to the first embodiment described above, and in each of the drawings, the same reference numerals are given to the same components as those of the first embodiment. Description is omitted.

<Jump mechanism>
As shown in the figure, also in the present embodiment, operation devices 100a and 101b for operating the first front work machine A and the second front work machine B are provided on both sides of the driver's seat 50. As in the first embodiment, the operating device 101b located on the left side of the driver's seat 50 has a jumping mechanism, and the floor F on the left side of the driver's seat 50 is interposed via the jumping mechanism. Is installed.

  The jumping mechanism in the present embodiment also has a configuration in which the support bracket 800 of the operation arm bracket 51b is provided on the gantry 820 that is installed on the floor surface F on the side of the driver's seat 50 via the rotating shaft portion 810. . The rotating shaft portion 810 includes a bent portion 93 provided on the rear side of the support bracket 800, a vertical bracket 94 extending vertically from the frame 820 so as to overlap the bent portion 93, and the vertical bracket 94. A jump spring (coil spring) that spans between a rotating shaft 850 that pivotally supports the curved portion 93, a locking pin 860 provided on the support bracket 800 side, and a locking pin 870 that is erected on the mount 820. ) And 880.

  In the present embodiment, the rotation shaft 850 is provided in an oblique direction such that the front side is separated from the driver seat 50 with respect to the front-rear (left-right) direction of the driver seat 50. Specifically, as shown in FIG. 10, the rotation shaft 850 is positioned at a predetermined angle θ (for example, 45 °) with respect to the left-right direction of the driver seat 50.

  Further, a lower stopper 890 that supports the lower end on the front side of the support bracket 800 and an upper stopper 900 that can come into contact with the outer surface of the operation arm bracket 51b are provided on the frame 820. The lower stopper 890 and the upper stopper 900 restrict the movable range (rotation amount) of the operation arm bracket 51b. Furthermore, a lock lever 95 is integrally provided on the support bracket 800 of the operation arm bracket 51b so as to extend forward of the driver's seat 50.

<Operation of the lifting mechanism>
FIG. 12 is a plan view showing a state in which the operating device 101b including the operating arm bracket 51b is flipped up laterally outside the driver's seat 50, FIG. 13 is a plan view thereof, and FIG. 14 is a front view thereof. According to the jumping mechanism according to the present embodiment, if the operator lifts the lock lever 95 provided on the support bracket 800 of the operation arm bracket 51b, the entire operation device 101b including the operation arm bracket 51b is The rotating shaft 810 of the rotating shaft part 810 located at the lower end is pivoted about the rotating shaft 850 so as to fall obliquely backward from the driver's seat 50. As a result, the operation arm 52b and the operation lever 54b are also separated so as to be greatly raised from the driver's seat, so that the space around the operator is widened and the driver's seat 50 can be easily boarded / exited.

  That is, the rotation shaft 850 of the rotation shaft portion 810 is provided in an oblique direction such that the front is away from the driver seat 50 with respect to the front-rear (left-right) direction of the driver seat 50, and therefore the operation including the operation arm bracket 51b. When the entire device 101b is rotated about the rotation shaft 850 of the rotation shaft portion 810 located at the lower end thereof, the operation lever 54b of the operation device 101b is moved outwardly to the left of the driver seat 50 as shown in FIGS. Move by the movement amount L2. 10 and 11, when the horizontal distance between the operating levers 54a and 54b of the left and right operating devices 100a and 101b in the operating state is La, the operating lever 101b is flipped up so that the operating lever 54b moves laterally rearward, and the horizontal distance between the operation levers 54a and 54b is increased by L2 to Lb as shown in FIGS.

  Also in the present embodiment, the driver's seat 50 is used as a reference as a method for determining the left and right outer movement amount L2 of the operation lever 54b by jumping up. That is, in FIG. 10 and FIG. 11, when the left and right overlapping lengths of the operation lever 54b and the driver's seat 50 are L3 when the driver's seat 50 is viewed from above, the movement amount L2 of the operation lever 54b in the left / right direction due to jumping is shown. However, L2> L3 is set. By doing so, the operation lever 54b moves outward from the driver's seat 50 when the operating device 101b is lifted, and the operator can more reliably avoid contact with the operation lever 54b when getting on and off the driver's seat. can do.

  Further, since the lower stopper 890 and the upper stopper 900 are also provided on the stand 820 of the raising mechanism as described above, the lower end of the support bracket 800 comes into contact with the lower stopper 890 and stands vertically. When in the closed state, the operation arm bracket 51b can be prevented from further rotating (approaching) to the driver seat 50 side. On the other hand, when the entire operation device 101b including the operation arm bracket 51b rotates (leaves) outside the driver's seat 50 about the rotation shaft 850 of the rotation shaft portion 810 located at the lower end thereof, the operation arm bracket 51b is moved. It is possible to prevent the entire operating device 101b including the operating arm bracket 51b from rotating (leaving) outward by hitting the upper stopper 900. As a result, it is possible to prevent the operation arm 52b, the operation lever 54b, and the like from contacting or colliding with the driver's seat 50 and surrounding devices or walls (not shown).

  Further, since the latching pin 860 provided on the support bracket 800 side and the latching pin 870 provided upright on the mount 820 are bridged by the jump spring 880, as shown in FIG. In a state where the bracket 51b is standing (a state where the bracket 51b is positioned in the vicinity of the driver's seat 50), since the spring 880 is positioned horizontally below the rotation shaft 850, the urging force of the spring 880 in the contraction direction. Can maintain the standing state. On the contrary, as shown in FIG. 12, when the operation arm bracket 51b is flipped up and is in contact with the upper stopper 900, the jump spring 880 is positioned above the rotary shaft 850. The fall state (the state of being flipped up) can be maintained by the urging force of the raising spring 880 in the contraction direction. Accordingly, the operating device 101b including the operating arm bracket 51b is not easily wobbled, and a stable posture can be maintained.

<Modification>
Also in the present embodiment, the lock switch 91 as in the first embodiment may be provided, and the operation of the work machine 200 may be switched between valid and invalid in conjunction with the lock switch 91 being turned on and off. Further, in contrast to the operation device 101b on the left side of the driver's seat 50, only the operation device 100a on the right side of the driver's seat 50 may jump up, or any of the operation devices 100a and 101b may jump up. Further, if the angle θ of the rotating shaft 850 is set in a range from 0 ° parallel to the left / right direction of the driver's seat 50 to 90 ° orthogonal to the left / right direction of the driver's seat 50, the controller device 101 b jumps in an arbitrary direction. Can be raised.

  In the present embodiment, since the lock lever 95 is provided on the support bracket 800 of the operation arm bracket 51b, when the lock lever 95 is lowered and the operation device 101b is set to the working posture, the lock lever 95 is moved to the cab. 4 functions to block the passage for boarding. Thereby, it is possible to prevent the operator from inadvertently going up and down from the cab 4 when the lock switch is on, that is, when the work machine 200 is operating.

Next, the overall configuration of the control system of the work machine 200 including the operation devices 100 and 101 as shown in the first and second embodiments will be described using the first embodiment.
<Control system overall configuration>
FIG. 15 is a functional block diagram of the control system of the first front work machine A and the second front work machine B. The second front work machine B is shown in parentheses in the figure.

  The control system shown in FIG. 15 is roughly classified into the displacement detectors 57a, 57b, 581a, 581b, 582a, 582b, 59a, 59b, 60a, 60b and the lock switch 91 in the operating device 100 and the work machine. An input system composed of angle sensors (not shown), a control device 61 that generates a drive signal and outputs a drive signal after performing a predetermined calculation upon receiving an input signal from the input system, and the control device 61, and an output system composed of respective drive systems (described in detail later) for operating each part of the work implement.

  The input system of the control device 61 includes operation arm displacement detectors 57a and 57b, operation lever vertical displacement detectors 581a and 581b, operation lever longitudinal displacement detectors 582a and 582b, and work tool rotation lever displacement. Detectors 59a and 59b, work tool operation switch displacement detectors 60a and 60b, and a lock switch 91 are provided.

  Further, as an output system of the control device 61, swing post cylinders 9a and 9b for driving swing post cylinders 9a and 9b for swinging the swing posts 7a and 7b to the left and right, and booms 10a and 10b are provided. Boom cylinder drive systems 63a and 63b for driving the boom cylinders 11a and 11b for swinging up and down, and arm cylinder drive systems 64a and 64b for driving the arm cylinders 13a and 13b for swinging the arms 12a and 12b up and down Work tool cylinder drive systems 65a and 65b for driving the work tool cylinders 15a and 15b for rotating the work tools 20a and 20b, and work tool drive systems 66a and 66b for driving the work tools 20a and 20b are provided. ing.

<Operation posture>
In order to operate the operation devices 100a and 100b to move the first front work machine A and the second front work machine B, the operator sits on the driver's seat 50 and the left arm elbow joint is placed on the operation arm 52b of the operation device 100b. The operator rests on the elbow joint support 77a of the armrest 53b, grips the work tool turning lever 55b with the palm of the left hand, and hangs the finger of the left hand on the work tool operation switch 56b. Similarly, the right arm elbow joint is placed on the elbow joint support 77a of the armrest 53a on the operation arm 52a of the operation device 100a, the work tool turning lever 55a is held by the palm of the right hand, and the finger of the right hand is operated. Hang on the tool operation switch 56a.

<Operation by operation arm>
When the operator swings the operating arms 52a and 52b of the operating devices 100a and 100b left and right with the forearms in this state (see w in FIG. 16), the operating arm detectors 57a and 57b are as shown in FIG. A detection signal is transmitted to the drive signal generator 61A in the control device 61. Next, the drive signal generator 61A that has received this detection signal generates a drive signal corresponding to the detection signal and transmits it to the swing post cylinder drive systems 62a and 62b. The swing post cylinder drive systems 62a and 62b that have received this drive signal extend and retract the swing post cylinders 6a and 6b. As a result, the swing posts 7a and 7b are swung in a direction that coincides with the displacement direction of the operation arms 52a and 52b (see W in FIG. 17).

  At this time, the swing speeds of the swing posts 7a and 7b are in a simple increase relationship, for example, a proportional relationship with the displacement amounts of the operation arms 52a and 52b, and the displacement of the operation arms 52a and 52b is the same as that of the swing posts 7a and 7b. Control the speed of oscillation. In this case, the position of the operation arms 52a and 52b may be controlled in proportion to the swing angle of the swing posts 7a and 7b.

<Operation by operation lever>
Further, when the operation levers 54a and 54b are displaced in the vertical direction (see y in FIG. 16) by the palm portion, the vertical displacement detectors 581a and 581b for the operation lever are detected by the drive signal generation unit 61B in the control device 61. Send a signal. Next, the drive signal generator 61B transmits a drive signal to the boom cylinder drive systems 63a and 63b. Further, the boom cylinder drive systems 63a and 63b that have received this drive signal expand and contract the boom cylinders 11a and 11b. Thereby, the booms 10a and 10b are swung (see Y in FIG. 17). At this time, the swing speed of the booms 10a and 10b is in a proportional increase relationship with the displacement amount of the operation levers 54a and 54b, for example, and the displacement of the operation levers 54a and 54b causes the booms 10a and 10b to swing. Speed control.

  Similarly, when the operation levers 54a and 54b are displaced in the front-rear direction (see x in FIG. 16) with the palm, the operation lever front-rear direction displacement detectors 582a and 582b are moved to the drive signal generation unit 61C in the control device 61. Send a detection signal. Next, the drive signal generator 61C that has received this detection signal transmits a drive signal to the arm cylinder drive systems 64a and 64b. Upon receiving this drive signal, the arm cylinder drive systems 64a and 64b extend and contract the arm cylinders 13a and 13b. As a result, the arms 12a and 12b are swung (see X in FIG. 17). At this time, the swing speed of the arms 12a and 12b is simply proportional to the displacement amount of the operation levers 54a and 54b, for example, proportional, and the displacement of the operation levers 54a and 54b causes the arms 12a and 12b to swing. Speed control.

<Operation by rotating lever>
When the work tool turning levers 55a and 55b are turned around the turning central axes 74a and 74b by the palm (see z in FIG. 16), the worker turning lever displacement detectors 59a and 59b are controlled by the control device 61. A detection signal is transmitted to the drive signal generator 61D. Next, the drive signal generator 61D that has received this detection signal transmits a drive signal to the work implement cylinder drive systems 65a and 65b. The work tool cylinder drive systems 65a and 65b that have received this drive signal expand and contract the work tool cylinders 15a and 15b. Accordingly, the work tools 20a and 20b are rotated in a direction that coincides with the rotation direction of the work tool rotation levers 55a and 55b (Z direction in FIG. 17).

  At this time, the rotation speeds of the work tool 20a and 20b are in a simple increase relationship with the displacement amount of the work tool rotation levers 55a and 55b, for example, a proportional relationship, and the displacement of the work tool rotation levers 55a and 55b is the work tool. The speed of the rotation of 20a, 20b is controlled. In this case, the position control may be performed by making the displacement amount of the work tool turning levers 55a and 55b proportional to the turning angle of the work tools 20a and 20b.

<Operation by operation switch>
When the work tool operation switches 56a and 56b are displaced by the finger parts, the work tool operation switch displacement detectors 60a and 60b transmit detection signals to the drive signal generation unit 61E in the control device 61. Receiving this detection signal, the drive signal generator 61E transmits a drive signal to the work tool drive systems 66a and 66b. The work tool drive systems 66a and 66b that have received this drive signal drive the work tools 20a and 20b. For example, when a grapple is handled as the work tools 20a and 20b, the grapple is opened and closed according to the operation of the work tool operation switches 56a and 56b.

  At this time, the opening / closing speed of the grapple has a simple increase relationship, for example, a proportional relationship with the displacement amount of the work tool operation switches 56a and 56b, and the displacement of the work tool operation switches 56a and 56b controls the speed of driving of the work tool.

<Control by lock switch>
As shown in FIG. 15, the control device 61 is provided with a connecting portion 61 </ b> F that operates in conjunction with turning on and off of the lock switch 91. When the lock switch 91 is off (or on), the connecting portion 61F is connected to each drive signal generator 61A from each displacement detector 57a, 57b, 581a, 581b, 582a, 582b, 59a, 59b, 60a, 60b. , 61B, 61C, 61D, and 61E, all detection signals transmitted to it are cut off. When the lock switch 91 is on (or off), the displacement detectors 57a, 57b, 581a, 581b, 582a, 582b, 59a, 59b, 60a, 60b to the drive signal generators 61A, 61B, 61C, 61D, All detection signals transmitted to 61E are transmitted as they are.

  Accordingly, as described above, the operation of the work machine 200 is automatically enabled / disabled in conjunction with the on / off of the lock switch 91, so that when the operator gets on and off the driver's seat 50, the operation lever 54b or the like is erroneously changed. This prevents the work machine 200 from malfunctioning even when it touches.

100, 101 ... operation device 100a ... operation device (right side of driver's seat)
100b, 101b ... operation device (left side of driver's seat)
DESCRIPTION OF SYMBOLS 200 ... Work machine 50 ... Driver's seat 51a, 51b ... Operation arm bracket 52a, 52b ... Operation arm 54a, 54b ... Operation lever 55a, 55b ... Work tool rotation lever 56a, 56b ... Work tool operation switch 57a, 57b ... Operation arm Displacement detectors 581a, 581b ... Vertical displacement detectors for operating levers 582a, 582b ... Front / rear direction displacement detectors for operating levers 59a, 59b ... Displacement detectors for working tool rotating levers 60a, 60b ... For working tool operation switches Displacement detector 61 ... Control device 61A ... Drive signal generator (swing post)
61B ... Drive signal generator (boom system)
61C: Drive signal generator (arm system)
61D ... Drive signal generator (work implement system)
61E ... Drive signal generator (work implement drive system)
61F: Connecting part 62a, 62b ... Swing post cylinder drive system 63a, 63b ... Boom cylinder drive system 64a, 64b ... Arm cylinder drive system 65a, 65b ... Work tool cylinder drive system 66a, 66b ... Work tool drive system 80, 800 ... Support brackets 81, 810 ... Rotating shafts 82,820 ... Places 83 ... Horizontal brackets 84 ... Vertical brackets 85,850 ... Rotating shafts 86,87,860,870 ... Locking pins 88,880 ... Spring springs (coil springs)
89, 890 ... lower stopper 90, 900 ... upper stopper 91 ... lock switch 93 ... bent portion 94 ... vertical bracket 95 ... lock lever θ ... flip-up rotation shaft angle F ... floor L2 ... amount of operation lever movement (left-right direction) )
L3: Overlapping length of the control lever and driver's seat La: Horizontal distance between the left and right control levers (working posture)
Lb: Horizontal distance between left and right control levers (jumping posture)

Claims (6)

An operating device for a work machine located from the side of the driver's seat to the front to operate the front work machine,
An operation arm bracket extending upward from the floor side of the driver seat side,
An operation arm extending in the front-rear direction of the driver's seat from the operation arm bracket;
An operation lever extending horizontally from the tip of the operation arm toward the driver's seat,
The operation arm bracket is rotatably provided on a floor surface of the driver's seat side portion or a pedestal installed on the floor surface via a rotating shaft portion,
A lower stopper that supports the lower end of the operation arm bracket on the floor surface of the driver's seat side or on a pedestal installed on the floor surface;
An operating device for a work machine, comprising: an upper stopper that regulates a rotation amount of the operating arm bracket when the operating arm bracket is rotated away from the driver's seat about the rotating shaft portion.
An operating device for a work machine. In the operating device of the working machine according to claim 1,
The rotating shaft portion is an operating device for a work machine in which the rotating shaft is positioned parallel to the front-rear direction of the driver seat. In the operating device of the working machine according to claim 1,
The rotating shaft portion is an operating device for a work machine in which the rotating shaft is positioned obliquely with respect to the front-rear direction of the driver seat. In the operating device of the working machine according to claim 1 ,
The upper stopper is configured such that when the operation arm bracket is rotated about the rotation shaft portion so as to be separated from the driver's seat, the maximum amount of movement of the operation lever in the left-right direction due to the rotation is determined from the front of the driver seat. An operating device for a work machine arranged so as to be larger than an overlapping length of the operating lever and the driver's seat in the left-right direction when viewed. In the operating device of the working machine according to claim 1 or 4 ,
An operating device for a work machine, wherein a jump spring is bridged between the operation arm bracket and a floor surface of the driver's seat side or a mount installed on the floor surface. In the operating device of the working machine according to any one of claims 1 to 5 ,
A lock switch that is turned on or off when the operation arm bracket is raised, and that is turned off or on when the operation arm bracket is rotated to be tilted;
An operating device for a work machine, comprising: a control unit that controls transmission of a detection signal in conjunction with on / off of the lock switch.

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