JP5124213B2 - Operation machine control lever device - Google Patents

Description

  The present invention relates to an operation lever device of a work machine such as a crane, an aerial work vehicle, an excavator, etc., in which a switch is provided in a grip portion.

  In the operating system of the work machine, as a safety measure, a switch (referred to as a deadman switch or an enable switch) is used as a means for indicating that the operator operates with the intention of operating before operating the operating lever. Some have an enable switch). The enable switch is a foot switch by a stepping operation, or a manual switch by a finger operation or a grip operation. In the latter case, the enable switch is often provided on an operation lever.

  As an example of a working machine provided with such an operating lever device, there is an aerial work vehicle X shown in FIG. 4, and an example of an operating lever device of a working machine provided with an enable switch B is shown in FIG. Yes (see, for example, Patent Document 1).

  As shown in FIG. 4, the aerial work vehicle X includes a swivel base 5 that is turnably driven by a swivel drive device 6 on a vehicle 1 that can run with wheels 3 and outriggers 4 before and after a vehicle body 2. A telescopic boom 7 that is supported at its upper end by the hoisting cylinder 8 at the upper end of the swivel 5 and that is telescopically driven by the telescopic cylinder 9 is telescopically extended at the distal end of the telescopic boom 7. The posture maintaining member 10 that maintains the posture regardless of the raising and lowering operation of the boom 7 is provided with a work table 12 that is driven to swing freely by the swing driving device 11 on the posture maintaining member 10.

  The work table 12 is provided with an operation lever device 100 for driving the turning drive device 6, the hoisting cylinder 8, the telescopic cylinder 9, the swing drive device 11 and others. The operation lever device 100 is usually a joystick type and has a configuration as shown in FIG. 5. This configuration will be briefly described below.

  The joystick-type operation lever device 100 includes a base 101 including a support mechanism and a tilt / rotation detection mechanism, a rod 110 that protrudes upward from the base 101 and is attached to be tiltable, and pivots on a tip of the rod 110. And a grip 120 that can be attached. The rod 110 is held by a pivot bearing mounted in the base 101 so as to be tiltable in the front-rear direction and the left-right direction. The tilt angle of the rod 110 in the front-rear direction and the left-right direction is determined by a first potentiometer 111 attached to the base 101. And a detection signal detected by the second potentiometer 113 and corresponding to each tilt angle is output. Further, the rod 110 is biased in a direction in which the tilt displacement of the rod 110 returns to the original by a biasing spring 115 or the like provided in the base 101, and when the operator's hand leaves the rod 110 in the tilted state, The rod 110 is configured to automatically return to the neutral position in the original vertical state. The boom 7 is raised and lowered by the control device according to the detection signal of the first potentiometer 111, and the boom 7 is expanded and contracted by the control device according to the detection signal of the second potentiometer 113.

  In addition, the grip 120 is configured in two upper and lower stages of an upper grip portion 121 and a lower grip portion 140, and the lower grip portion 140 is disposed on the same axis as the central axis of the rod 110 and rotates with respect to the rod 110. It is mounted movably. Further, the lower grip portion 140 has a cylindrical shape on the inner side and a polygonal shape on the outer side, and the outer shape has a shape slightly larger than that of the upper grip portion 121. A third potentiometer 147 that detects the rotation angle of the lower grip 140 and outputs a detection signal corresponding to the rotation angle is attached between the lower grip 140 and the lower member. In response to the detection signal of the third potentiometer 147, the boom 7 is configured to turn by the control device.

  By the way, as shown in FIG. 5, the enable switch 135 provided in the upper grip portion 121 is attached to the side portion of the upper grip portion 121 so as to protrude radially outward, and protrudes into the main body portion 135a and the main body portion 135a. And a switch operating portion 135b attached to be able to enter. The switch operating portion 135b is urged in a direction protruding from the main body portion 135a (a direction away from the axial center of the rod 110) by a spring member (not shown), and is pressed in a direction approaching the axial center of the rod 110 to be main body portion. When moved to the side of 135a, the enable switch 135 is configured to output an ON signal from the main body 135a. The enable switch 135 tilts the rod 110 in the front-rear direction and the left-right direction while pressing the switch operation unit 135b, so that the control device determines that the detection signals of the first potentiometer 111 and the second potentiometer 113 are valid. In response to this detection signal, the control device can detect the detection signal of the third potentiometer 147 by rotating the lower grip 140 so that the boom 7 moves up and down and expands and contracts and the switch operation unit 135b is pushed. It is determined that the boom 7 is turned and the boom 7 is turned according to the detection signal.

  The upper grip 121 and the lower grip 140 are connected to an upper return mechanism and a lower return mechanism that restrict these rotation ranges and automatically return them to their original neutral positions.

  Next, the operation of the operation lever device described above will be described.

  First, the aerial work vehicle X travels and is carried into the work site, and stops at an appropriate place as an installation place. Then, the outrigger 4 is operated to jack up the wheel 3 so that the wheel 3 is separated from the ground and the vehicle body 2 is substantially horizontal.

  When the jack-up is completed, the operator gets on the work table 12 and attaches the safety belt, and then operates the operation lever device to operate the boom 7 to move the work table 12 to the work target place and bring it closer. At this time, the operator tilts the rod 110 while holding the grip 120 while pushing the switch operation portion 135b of the enable switch 135 with a finger, or presses the switch operation portion 135b of the enable switch 135 with the finger. The boom 7 is operated as desired by rotating the grip 140 around the rod 110. By the tilting operation of the rod 110, the boom 7 performs the undulation operation or the expansion / contraction operation individually or simultaneously, and the boom 7 rotates by the rotation operation of the lower grip portion 140.

  Here, an example of another grip 122 will be described.

  The grip 122 is configured in two upper and lower stages including an upper grip portion 123 and a lower grip portion 124, and the lower grip portion 124 is disposed on the same axis as the central axis of the rod 110. 110 is rotatably attached to 110. Further, the lower grip portion 124 has a cylindrical shape on the inner side and a polygonal shape on the outer side, and the outer shape has a shape slightly larger than that of the upper grip portion 123. A third potentiometer 147 that detects a rotation angle of the lower grip portion 124 and outputs a detection signal corresponding to the rotation angle is attached between the lower grip portion 124 and the lower member. In response to the detection signal of the third potentiometer 147, the boom 7 is configured to turn by the control device.

  By the way, as shown in FIG. 7, the enable switch 136 provided on the upper grip portion 123 is attached to the side portion of the upper grip portion 123 so as to protrude obliquely downward in a direction away from the axis center of the rod 110. The main body part 136a and the switch operation part 136b attached to the main body part 136a so as to be able to protrude are configured. The switch operating portion 136b is urged in a direction projecting obliquely downward from the main body portion 136a by a spring member (not shown). When the switch operating portion 136b is pushed obliquely upward and moves toward the main body portion 136a, the enable switch 136 is An ON signal is output from 136a. In the enable switch 136, the control device determines that the detection signals of the first potentiometer 111 and the second potentiometer 113 are valid by tilting the rod 110 in the front-rear direction and the left-right direction while pushing the switch operation unit 136b obliquely upward. Then, in response to the detection signal, the control device is moved to the third potentiometer by rotating the lower grip 124 so that the boom 7 moves up and down and expands and contracts, and the switch operation unit 136b is pushed obliquely upward. The detection signal 147 is determined to be valid, and the boom 7 is turned according to the detection signal.

  The upper grip portion 123 and the lower grip portion 124 are provided with an upper return mechanism and a lower return mechanism that restrict these rotation ranges and automatically return these rotated positions to their original neutral positions. And it is connected similarly to the lower grip part 140.

Since the grip 122 and the enable switch 136 configured as described above operate in the same manner as the grip 120 and the enable switch 135 described above, detailed description thereof will be omitted.
Japanese Patent Laid-Open No. 2002-318628 (page 4, FIGS. 3 and 6)

  In the technique disclosed in Patent Document 1, when only the tilting operation of the rod 110 is performed, the operator grasps the grip 120 from above and keeps pushing the switch operating portion 135b of the enable switch 135 near the base of the finger. The rod 110 is tilted. At this time, the fingertip of the finger that has pushed the switch operation portion 135b reaches the lower grip portion 140.

  When the relative position between the upper grip part 121 and the lower grip part 140 is the same as when not operated (the upper grip part 121 is not rotated with respect to the rod 110 and the lower grip part 140 is also rotated with respect to the rod 110). If the upper grip part 121 and the lower grip part 140 are rotated in the same direction and at the same angle), the lower grip part 140 has a slightly larger shape (outer diameter) in plan view than the upper grip part 121. ), There is a problem that it is difficult to maintain the posture of the finger while the switch operation unit 135b is pushed near the base of the finger. In the worst case, the finger may come off from the switch operation unit 135b and the operation may stop.

  Further, when the relative positions of the upper grip portion 121 and the lower grip portion 140 are changed and the corner portion 141 is positioned at the lower portion of the switch operation portion 135b, the lower grip portion 140 is viewed in plan with respect to the upper grip portion 121. However, since the corner portion 141 having a large radius greatly overlaps the switch operation portion 135b in a plan view, the push operation of the switch operation portion 135b is obstructed. In the worst case, the finger may come off from the switch operation unit 135b and the operation may stop.

  That is, there is a problem even when the relative position between the upper grip part 121 and the lower grip part 140 is the same as when the non-operation is performed, and the relative position between the upper grip part 121 and the lower grip part 140 is changed. In that case, there was a bigger problem.

  In the grip 120 and the enable switch 136 constituted by the upper grip portion 123 and the lower grip portion 124, the push operation of the enable switch 136 itself is operated with a fingertip as compared with the configuration of the grip 120 and the enable switch 135 described above. However, when the lower grip portion 124 is rotated relative to the upper grip portion 123, the same problem is caused.

  Accordingly, an object of the present invention is to solve the problem of the enable switch 135 or 136 as described above, and to provide an operation lever device for a work machine that is easy to perform a push-in operation and is unlikely to stop the operation due to a finger being removed. Is to provide.

  In order to solve these problems, the operation lever device for a working machine according to the present invention employs the following configuration.

  According to a first aspect of the present invention, a base, a shaft having a base end attached to the base so as to be tiltable in at least one axial direction, a front end grip and a front end grip provided at the front end of the shaft A grip portion configured in two stages, a base end side grip provided so as to be rotatable in the circumferential direction of the shaft portion on the base end side of the shaft portion adjacent to the shaft portion, and occupying a part of the distal end side grip in the circumferential direction Switch means for outputting a signal by pushing the pushing member in a direction perpendicular to the shaft portion or by pushing the pushing member in the plane including the shaft portion toward the tip end; and a base A tilt detection signal output means for detecting the tilt direction and tilt amount of the shaft portion and outputting as a signal, and a rotation detection signal output for detecting the pivot direction and pivot amount of the proximal grip and outputting as a signal Means and switch hand And a control device that receives signals from the tilt detection signal output means and the rotation detection signal output means and outputs a control signal, wherein the base end grip is connected to the shaft portion. An arc-shaped portion provided with substantially the same diameter in the circumferential direction and a notch portion provided as a short diameter with respect to the diameter of the arc-shaped portion in the circumferential direction of the shaft portion other than the arc-shaped portion, In a direction view from the distal end side of the shaft portion to the proximal end side, the configuration is such that it substantially overlaps with the pushing member over the entire range of the pivotable range of the proximal end grip.

  As described above, the grip is configured in two stages, that is, the shaft portion attached so as to be tiltable in at least one axial direction, the distal end side grip provided with the switch means, the proximal end side grip including the arcuate portion and the notch portion. In the operating lever device of the working machine comprising the part, the notch part is the pushing member over the entire range of the pivotable range of the base end side grip when viewed from the front end side to the base end side of the shaft part. Therefore, the finger that performs the pushing operation of the pushing member is always positioned at the notch regardless of the turning operation of the proximal grip. Further, even when the proximal end side grip is operated while the shaft portion is tilted, the finger that performs the pressing operation of the pressing member similarly acts so as to always be positioned at the notch portion.

  In the second invention of the present invention, a base, a shaft portion attached to the base so as to be tiltable in two axial directions substantially orthogonal to the base, and a distal end portion of the shaft portion are rotated in the circumferential direction of the shaft portion. A grip composed of two stages, a front end grip provided movably and a base end grip provided rotatably in a predetermined range in the circumferential direction of the shaft portion on the base end side of the shaft portion adjacent to the front end grip. Occupying a part in the circumferential direction of the grip portion and the distal end side grip, and by pushing the pushing member in a direction perpendicular to the shaft portion or within the plane including the shaft portion, A switch means for outputting a signal by pushing, a tilt detection signal output means for detecting a tilt direction and a tilt amount of the shaft portion provided on the base and outputting it as a signal, and a proximal end grip or the vicinity thereof Base end side grease Rotation detection signal output means for detecting the rotation direction and rotation amount of the head and outputting it as a signal; signals from the switch means, tilt detection signal output means and rotation detection signal output means are received and a control signal is output In the operating lever device of the working machine including the control device, the proximal-side grip includes an arc-shaped portion provided with substantially the same diameter in a circumferential direction of the shaft portion, and a shaft portion other than the arc-shaped portion. The notch portion is formed with a short diameter with respect to the diameter of the arcuate portion in the direction, and the notch portion is a rotation range of the proximal side grip when viewed from the shaft portion distal end side to the proximal end side. It was set as the structure which overlaps with the said pushing member over the whole range.

  Thus, the base end which consists of the shaft part attached so that it can tilt in two axial directions, the front end side grip which provided the switch means and was able to turn in the circumferential direction of a shaft part, an arc-shaped part, and a notch part In the operation lever device of the working machine comprising the grip portion configured in two steps with the side grip, the notch portion can rotate the base end side grip in a direction view from the distal end side of the shaft portion to the proximal end side. Since the configuration is such that it substantially overlaps with the pushing member over the entire range, the distal end side grip can be rotated for easy operation, and the proximal end side grip can be rotated even if the proximal end side is rotated. In any case, the finger that pushes the pushing member acts so as to be always located in the notch. Further, even if the proximal grip is operated while the shaft portion is tilted in the biaxial direction, the finger that pushes the pushing member similarly acts so as to be always located in the notch portion.

  According to a third aspect of the present invention, in the operation lever device for a working machine according to the first aspect or the second aspect of the present invention, the notch portion of the base end side grip is continuous from the arc-shaped portion. In addition, the diameter around the shaft is gradually reduced.

  In the first invention or the second invention of the present invention, since the notch portion is configured as described above, in addition to the action of the first invention or the second invention of the present invention, the arc-shaped portion and the notch portion This prevents the finger from being caught on the connecting portion.

  According to a fourth aspect of the present invention, in the operating lever device for a working machine according to the first aspect or the second aspect of the present invention, the arcuate portion of the base end side grip is provided with a non-slip on the outer periphery. The configuration was as follows.

  In the first invention or the second invention of the present invention, since the arc-shaped portion is configured as described above, in addition to the action of the first invention or the second invention of the present invention, the arc-shaped portion is grasped with the fingertip. The effect that the fingertip does not slip when rotating is obtained.

  According to a fifth aspect of the present invention, in the operating lever device for a working machine according to the first aspect or the second aspect of the present invention, the base end grip has a circumference with respect to the switch means of the arcuate portion. It was set as the structure provided with the large convex part in the direction nearest vicinity part.

  In the first invention or the second invention of the present invention, since the arc-shaped portion is configured as described above, in addition to the action of the first invention or the second invention of the present invention, the proximal grip is rotated with the fingertip. In the case of a dynamic operation, it acts to operate by pushing a large convex part with a fingertip.

In the present invention, the following effects can be obtained.
According to the lever device of the working device according to the first aspect of the present invention, the base, the shaft portion having the base end attached to the base so as to be tiltable in at least one axial direction, and the tip of the shaft portion A grip portion configured in two stages, a distal end grip and a proximal end grip provided to be rotatable in the circumferential direction of the shaft portion on the proximal end side of the shaft portion adjacent to the distal end grip, and the distal end grip Occupies a part of the circumferential direction and pushes the pushing member in a direction perpendicular to the shaft part, or pushes the pushing member in the plane including the shaft part toward the tip side. Switch means for outputting, a tilt detection signal output means for detecting the tilt direction and tilt amount of the shaft portion provided on the base and outputting as a signal, and detecting the pivot direction and pivot amount of the proximal grip. Rotation output as a signal In the operating lever device of a work machine comprising: an output signal output means; a control device that receives signals from the switch means, the tilt detection signal output means, and the rotation detection signal output means and outputs a control signal; The side grip has an arc-shaped portion provided with substantially the same diameter in the circumferential direction of the shaft portion, and a notch portion provided as a short diameter with respect to the diameter of the arc-shaped portion in the circumferential direction of the shaft portion other than the arc-shaped portion. The notch portion is configured to substantially overlap with the pushing member over the entire range of the pivotable range of the proximal end side grip when viewed from the shaft portion distal end side to the proximal end side. Regardless of the rotation operation of the end grip, the finger that pushes the pushing member is always located in the notch, so that the finger that pushes is not obstructed by the arcuate part, and is stable and reliable. Because it was able to maintain an effective push operation That. Even if the proximal grip is operated while tilting the shaft, the finger that pushes the pushing member is always located in the notch. Thus, the effect that the stable and reliable pushing operation can be continued without being obstructed by the above is obtained.

  According to the lever device of the working device according to the second aspect of the present invention, the base, the shaft portion attached to the base so as to be tiltable in two axial directions substantially orthogonal to the base end, and the tip of the shaft portion A proximal grip that is pivotably provided in a predetermined range in the circumferential direction of the shaft portion on the proximal end side of the shaft portion adjacent to the distal end side grip and the distal end side grip that is rotatably provided in the circumferential direction of the shaft portion The grip portion is configured in two steps, and the tip side grip occupies a part in the circumferential direction and pushes the pushing member in a direction perpendicular to the shaft portion or within the plane including the shaft portion. Switch means for outputting a signal by pushing the pushing member toward the distal end side, a tilt detection signal output means for detecting a tilt direction and a tilt amount of the shaft portion provided on the base and outputting as a signal, Proximal grip or A rotation detection signal output means for detecting a rotation direction and a rotation amount of the proximal end grip provided in the vicinity thereof and outputting it as a signal, a switch means, a tilt detection signal output means, and a rotation detection signal output means. In the operating lever device of the working machine including a control device that receives a signal and outputs a control signal, the proximal-side grip includes an arc-shaped portion provided with substantially the same diameter in the circumferential direction of the shaft portion, It consists of a notch provided in the circumferential direction of the shaft part other than the arcuate part as a minor axis with respect to the diameter of the arcuate part, and the notch part is a proximal end in a direction view from the distal end side to the proximal end side of the shaft part. Since it has a structure that substantially overlaps with the pushing member over the entire range of rotation of the side grip, it is provided with a shaft portion that can be tilted in two axial directions and can be rotated in the circumferential direction of the shaft portion. Tip side with switch means Regardless of the rotation operation of the base end side grip even in the operation lever device of the work machine including the grip portion configured in two steps of the base end side grip including the lip, the arc-shaped portion, and the notch portion. Since the finger that pushes the pusher member is always located at the notch, the pusher can be pushed even if the proximal grip is rotated by turning the tip grip so that it can be operated easily. Thus, the effect of maintaining a stable and reliable pushing operation without being obstructed by the arcuate portion was obtained. Also, even if the proximal grip is operated while tilting the shaft in two directions, the finger that pushes the pusher is always located at the notch, so the tip grip can be rotated. Even if the proximal grip is rotated further in the direction in which it is easy to move, the finger that performs the pushing operation in the same manner is not obstructed by the arcuate portion, and the effect of maintaining a stable and reliable pushing operation can be obtained. It was.

  According to the lever device of the working device according to the third aspect of the present invention, in the operation lever device of the working machine according to the first or second aspect of the present invention, the notch of the base end side grip is provided. Since the portion is configured to be continuous from the arc-shaped portion and gradually reduce the diameter around the shaft portion, in addition to the action of the first invention or the second invention of the present invention, the arc-shaped portion and the notch portion Since the finger is not caught on the connecting portion, the finger that performs the pushing operation can obtain an effect that the pushing operation can be maintained stably and surely. Also, even if the proximal grip is operated while tilting the shaft, the finger that pushes the push member is always located in the notch. The effect that a certain pushing operation can be maintained was obtained.

  According to the lever device of the working device according to the fourth invention of the present application, in the operation lever device of the working machine according to the first invention or the second invention of the present invention, the arcuate shape of the base end side grip Since the part has a structure provided with a non-slip on the outer periphery, in addition to the action of the first invention or the second invention of the present invention, the fingertip does not slip when the arc-shaped part is gripped with the fingertip and rotated. Thus, the effect that the finger that performs the rotation operation can maintain a stable and reliable rotation operation is obtained. In addition, even if the proximal grip is rotated while tilting the shaft portion, the finger that performs the same rotation operation can maintain a stable and reliable rotation operation.

  According to the lever device of the working device according to the fifth invention of the present application, in the first invention or the second invention of the present invention, the base end side grip surrounds the switch means of the arcuate portion. Since it has a configuration with a large convex portion in the direction nearest portion, in addition to the action of the first invention or the second invention of the present invention, when the proximal grip is rotated with the fingertip, Since the convex part is pushed and operated, the finger that does not slip without grasping the proximal end grip with the fingertip, and the rotating operation can maintain the stable and reliable rotating operation. . In addition, even if the proximal grip is rotated while tilting the shaft portion, the finger that performs the same rotation operation can maintain a stable and reliable rotation operation.

  The operation lever device of the working machine of the present invention will be described below with reference to FIGS.

  The configuration of the aerial work vehicle X, which is an example of the subject of the present invention, does not change with the reference numeral shown in FIG. 4 and described as the background art, so the description is omitted and the same reference numeral is used in the following description.

  The operation lever device for a working vehicle according to the present invention is characterized by the structure of the grip part, detects the tilting direction and tilting amount of the shaft part of the shaft part, attachment of the base part and the shaft part, and outputs it as a signal. Since the configuration of the tilt detection signal output means (potentiometer) provided on the base is the same as that shown in FIG. 5 and described as the background art, the description is omitted and the same reference numerals are used in the following description.

  First, it demonstrates using FIGS. 1-2, and 4. FIG. A is an operating lever device, 21 (not shown) is a shaft portion, 21a (not shown) is a proximal end portion, 21b is a distal end portion, 22 is a grip portion, 23 is a distal end side grip, 24 is Proximal grip 24a is an arcuate part, 24b is a notch part, 24c is a non-slip, 25 is a base side surface, 26 is a switch means, 27 is a pushing member, 31 (illustrated) No) is a control device, and 147 (not shown) is a third potentiometer.

  The grip portion 22 in the operating lever device A is provided at the distal end portion 21b of the shaft portion 21, and first and second potentiometers 111 and 113 that detect the tilt direction and the tilt amount of the shaft portion 21 and output them as signals. The tilt detection signal output means in this range is provided on the base 101. The control device 31 receives signals from the first, second, and third potentiometers 111, 113, and 147 and outputs a control signal, and an actuator that is a target of the control signal operates.

  The operation lever is not limited to one that is vertically installed from bottom to top, and may be one that is provided on a slope or a vertical wall.

  Further, the third potentiometer 147 may be provided near the end face of the base end portion 21a of the shaft portion 21, and in this way, the selection range of the potentiometer can be increased.

  The shaft portion 21 does not necessarily have to be tiltable in the biaxial direction, and may tilt only in the single axial direction.

  The grip portion 22 is provided on the distal end side of the shaft portion 21, which is provided at the distal end side of the shaft portion 21, and on the proximal end side of the shaft portion 21 adjacent to the distal end side grip 23. It is configured in two stages with the grip 24.

  The front end side grip 23 includes a built-in switch means 26, and the base-side surface 25 includes a pushing member 27 of the switch means 26 occupying a part in the circumferential direction. The switch means 26 is configured to output a signal by pushing the pushing member 27 in the plane including the shaft portion 21 toward the tip side.

  Although the mounting position of the pressing member 27 has been described as the base-side surface 25 of the grip portion 22, the base-side surface 25 is inclined even if it is a surface substantially perpendicular to the axial direction of the shaft portion 21. It may be a flat surface or a curved surface. Therefore, the pushing direction of the pushing member 27 may be a direction perpendicular to the shaft portion 21. Further, the shape of the pushing member 27 is not specified as a rectangle, a round shape, an ellipse, a plane, a curved surface, or the like.

  The switch means 26 may be intended for the operation of various actuators. In the following description, the switch means 26 is a means for indicating that the operator has an intention to operate before operating the operation lever. This will be described as an enable switch.

  By the way, the proximal end side grip 24 is shorter than the diameter of the arcuate part 24a in the circumferential direction of the shaft part 21 other than the arcuate part 24a provided with substantially the same diameter in the circumferential direction of the shaft part 21. It consists of a notch 24b provided as a diameter.

  The cutout portion 24b is configured to substantially overlap with the pushing member 27 over the entire range of the pivotable range of the proximal end side grip 24 in a direction view from the distal end side to the proximal end side of the shaft portion.

  Hereinafter, the operation of the operation lever device of the working machine of the present invention configured as described above will be described.

  First, the aerial work vehicle X travels and is carried into the work site, and stops at an appropriate place as an installation place. Then, the outrigger 4 is operated to jack up the wheel 3 so that the wheel 3 is separated from the ground and the vehicle body 2 is substantially horizontal.

  When the jack-up is completed, the operator gets on the work table 12 and attaches the safety belt, and then operates the operation lever device to operate the boom 7 to move the work table 12 to the work target place and bring it closer. At this time, the operator grasps the grip portion 22 and pulls up and pushes the pushing member 27 of the switch means 26 in the distal end side grip 23 in the direction of the distal end side of the shaft portion 21 by holding the fingertip while maintaining the lifting push. The boom 7 is operated in a desired manner by tilting the shaft portion 21 or rotating the proximal end side grip 24 around the shaft portion 21. By the tilting operation of the shaft portion 21, the boom 7 performs the undulation operation or the expansion / contraction operation individually or simultaneously, and the boom 7 rotates by the rotation operation of the proximal end side grip 24.

  When the proximal grip 24 is turned, the notch 24b is a pushing member over the entire range in which the proximal grip 24 can be rotated as viewed from the distal end side to the proximal end side of the shaft portion. 27 is substantially the same as that of FIG. That is, the arcuate portion 24a does not substantially overlap with the pushing member 27 over the entire range in which the proximal grip 24 can be rotated, contrary to the notch portion 24b.

  Therefore, since the finger that pushes the pushing member 27 is always located in the notch 24b regardless of the turning operation of the base end side grip 24, the finger that pushes the push operation on the arcuate portion 24a. The effect of being able to maintain a stable and reliable pushing operation without being obstructed was obtained. Even if the proximal end side grip 24 is operated while the shaft portion 21 is tilted, the finger that pushes the pushing member 27 is always located at the notch 24b. Thus, the arc-shaped portion 24a is not obstructed, and an effect that a stable and reliable pushing operation can be maintained is obtained.

  These effects can be obtained even if the shaft portion 21 is not necessarily tiltable in two axial directions and can be tilted only in one axial direction.

  Further, when the tip end side grip 23 is provided at the tip end portion of the shaft portion 21 so as to be rotatable in the circumferential direction of the shaft portion, a posture as shown in FIG. 2 is possible. In other words, the distal end side grip 23 can be rotated by an angle δ in an easy-to-operate direction, and then the proximal end side grip 24 can be rotated by a desired angle Θ.

  Therefore, in such a configuration, even when the proximal grip 24 is rotated, the finger that performs the pushing operation is not obstructed by the arcuate portion 24a, and the pushing operation can be maintained stably and reliably. Further, even if the proximal end grip 24 is operated while the shaft portion 21 is tilted in the biaxial direction, the finger that pushes the pushing member 27 is always located in the notch 24b. Even if the side grip 24 is rotated, the finger that performs the pushing operation in the same manner is not obstructed by the arc-shaped portion 24a, and the shaft portion can be maintained at the distal end of the shaft portion 21 so that a stable and reliable pushing operation can be continued. The operation lever device of the working machine having a configuration that does not rotate in the circumferential direction, the same operation and the same effect can be obtained, and the tip side grip 23 can be rotated and operated in an easy-to-operate direction. The operation lever of a work machine that is easier to operate and less tiring Than it was able to provide a device.

  By the way, the notch 24b can be configured to be continuous from the arcuate part 24a and gradually reduce the diameter around the shaft part. With this configuration, the connection between the arcuate part 24a and the notch 24b is possible. Since the finger is not hooked on the part, the effect that the finger performing the pushing operation can continue the pushing operation stably and reliably is obtained. Further, even if the proximal end side grip 24 is operated while the shaft portion 21 is tilted, a finger is not caught on the connecting portion between the arcuate portion 24a and the notch portion 24b. Thus, the effect that the finger performing the operation can maintain a stable and reliable pushing operation was obtained.

  In addition, when the arcuate portion 24a is configured to include a slip stopper 24c on the outer periphery, the fingertip does not slip when the arcuate portion 24a is gripped by the fingertip and rotated, so that the finger performing the rotating operation is stable. And the effect that a reliable rotation operation can be maintained was acquired. Further, even when the proximal end side grip 24 is rotated while the tilting operation of the shaft portion 21 is performed, it is possible to obtain an effect that a finger that performs the same rotation operation can maintain a stable and reliable rotation operation. .

  Furthermore, another embodiment of the proximal end side grip 24 will be described. 24d is a large-sized convex part. Since the large convex portion 24d has a configuration in which the large convex portion 24d is provided in the circumferentially nearest portion with respect to the switch means 26 of the arc-shaped portion 24a in the base end side grip 24, in addition to the above-described configuration, When the proximal end grip 24 is rotated with the fingertip, the large convex portion 24d is pushed by the fingertip, so that the proximal end grip 24 is not slipped even if the fingertip is not gripped with the fingertip, and the finger is operated to rotate. However, the effect that a stable and reliable rotation operation can be maintained was obtained. Further, even when the proximal end side grip 24 is rotated while the tilting operation of the shaft portion 21 is performed, it is possible to obtain an effect that a finger that performs the same rotation operation can maintain a stable and reliable rotation operation. .

  In the above description, the operation lever device for a work vehicle according to the present invention has been described as being applied to an aerial work vehicle, but of course, it can be applied to an operation lever device for a work device such as a crane or an excavator. is there.

It is explanatory drawing of the operating lever apparatus of the working vehicle which concerns on this invention. It is explanatory drawing of the operating lever apparatus of the working vehicle which concerns on this invention. It is explanatory drawing of the other example of the operation lever apparatus of the working vehicle which concerns on this invention. It is explanatory drawing of the aerial work vehicle of the example to which this invention is applied. It is explanatory drawing of the operating lever apparatus of the conventional working vehicle. It is explanatory drawing of the operating lever apparatus of the conventional working vehicle. It is explanatory drawing of the operating lever apparatus of the conventional working vehicle.

Explanation of symbols

21 Shaft portion 21a Base end portion 21b Tip end portion 22 Grip portion 23 Tip end grip 24 Base end side grip 24a Arc portion 24b Notch portion 24c Non-slip 24d Large convex portion 25 Base end surface 26 Switch means 27 Pushing member 101 Base 111 Tilt detection signal output means 113 Tilt detection signal output means 147 Rotation detection signal output means A Operation lever device

Claims (5)

A base, a shaft having its base end attached to the base in a tiltable manner in at least one axial direction, a tip side grip provided at the tip of the shaft, and a base end side of the shaft adjacent to the tip side grip The grip part configured in two steps with the base end side grip provided so as to be rotatable in the circumferential direction of the shaft part and the distal side grip occupies a part of the circumferential direction and pushes it in a direction perpendicular to the shaft part. Switch means for outputting a signal by pushing the moving member or by pushing the pushing member toward the distal end side within the plane including the shaft portion, and a tilt direction of the shaft portion provided on the base Tilt detection signal output means for detecting the tilt amount and outputting it as a signal, rotation detection signal output means for detecting the rotation direction and amount of rotation of the proximal grip and outputting it as a signal, switch means and tilt detection signal Output means and A control lever device for a working machine having a control device for outputting the received control signal the signal from the motion detection signal output means,
The proximal grip includes a circular arc portion provided with substantially the same diameter in the circumferential direction of the shaft portion, and a cut portion provided as a short diameter with respect to the diameter of the circular arc portion in the circumferential direction of the shaft portion other than the circular arc portion. A notch portion, and the notch portion substantially overlaps with the pushing member over the entire range of the pivotable range of the proximal grip when viewed from the shaft portion distal end side to the proximal end side. An operating lever device for a work machine characterized by the above. A base portion, a shaft portion whose base end portion is attached to the base portion so as to be tiltable in two axial directions substantially orthogonal to each other, and a tip-side grip provided at the tip portion of the shaft portion so as to be rotatable in the circumferential direction of the shaft portion A grip portion configured in two stages, a proximal end grip provided rotatably in a predetermined range in the circumferential direction of the shaft portion on the proximal end side of the shaft portion adjacent to the distal end side grip, and a circumferential direction on the distal end side grip A signal is output by pushing the pushing member in a direction perpendicular to the shaft portion or by pushing the pushing member in the plane including the shaft portion toward the tip side. The switch means, the tilt detection signal output means for detecting the tilt direction and the tilt amount of the shaft portion provided on the base and outputting as a signal, and the rotation direction of the base end grip provided at or near the base end grip And the amount of rotation A rotation detection signal output means for outputting as a signal, a control device for receiving signals from the switch means, the tilt detection signal output means and the rotation detection signal output means and outputting a control signal. An operating lever device,
The proximal grip includes a circular arc portion provided with substantially the same diameter in the circumferential direction of the shaft portion, and a cut portion provided as a short diameter with respect to the diameter of the circular arc portion in the circumferential direction of the shaft portion other than the circular arc portion. A notch portion, and the notch portion substantially overlaps with the pushing member over the entire range of the pivotable range of the proximal grip when viewed from the shaft portion distal end side to the proximal end side. An operating lever device for a work machine characterized by the above.   The operation of the working machine according to claim 1 or 2, wherein the notch portion of the base end side grip is configured to be continuous from the arc-shaped portion and to gradually reduce a diameter around the shaft portion. Lever device.   3. The operating lever device for a working machine according to claim 1, wherein the arcuate portion of the base end side grip is provided with a slip stopper on an outer periphery. 4. The operating lever for a working machine according to claim 1 or 2, wherein the base end side grip is provided with a large convex portion in a circumferentially nearest portion with respect to the switch means of the arcuate portion. apparatus.

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