JP2013036209A - Operation device of double arm type work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation device of a double arm type work machine, capable of properly changing a gap between the holding parts of right and left control levers when an operator gets in or off the work machine.SOLUTION: A double arm type work machine comprises a traveling body 1, a revolving superstructure 2 provided to be revolvable with respect to the traveling body, an operator cab 3 provided on the revolving superstructure, a left work arm 7 provided on the left front part of the revolving superstructure, and a right work arm 6 provided on the right front part of the revolving superstructure. An operation device of the double arm type work machine includes: left work arm operation means 50a provided on the left side of a cab seat 49 so as to be swingable around a vertical shaft; right work arm operation means 50b provided on the right side of the cab seat so as to be swingable around a vertical shaft; right and left springs for neutral position return respectively connected to the rotary shafts of the left work arm operation means and the right work arm operation means; a lock lever 100 provided in the operator cab; and swing means for swinging the left work arm operation means and the right work arm operation means in mutually opposite opening directions in response to locking operation of the lock lever.

Description

  The present invention relates to an operating device for a double-armed working machine, and more particularly to an operating device for a double-armed working machine provided with operating levers on both sides of a driver's seat.

  In the dismantling work of a structure, for example, a concrete piece containing a steel frame is generated as industrial waste. This concrete piece needs to be further separated and disassembled in order to recycle or discard each of the steel frame and concrete.

  In such a separate dismantling operation, one member (for example, concrete) of the object to be disassembled is held by the first front work machine, and the other member (for example, steel frame) of the object to be disassembled by the second front work machine. ) May be used to separate and dismantle them.

  In this double-arm type work machine, in order to be able to instruct all the operations of the work tool that performs a plurality of types of operations and the first and second front work machines equipped with the operation tools, an operation arm, an operation lever, Are provided on both the left and right sides of the driver's seat (see, for example, FIG. 4 of Patent Document 1).

JP 2006-307433 A

  An operation device for a double-armed work machine described in Patent Document 1 includes an operation arm attached to an arm bracket fixed to the side of a driver's seat so as to be swingable left and right around a swing center axis, and the operation arm. It is comprised from the horizontal operation lever etc. which were attached inside the front-end | tip part so that rocking was possible up and down. The operation lever is formed in a substantially bar shape, and one end side of the operation lever is coupled to the inner side of the operation arm, and a grip portion is provided at the other end. In front of the driver seated in the driver's seat, the other end sides of the left and right operation levers are arranged to face each other with a narrow gap.

  In this operating device, when getting in and out of the cab, after being disabled by the gate lock mechanism, etc., the left and right operating levers and the left and right operating arms are spread out to the left and right to create a gap between the left and right operating levers. It is necessary to get on and off while making it wide. In this way, the driver has to get on and off while pushing the operating lever, etc., so the driver's body may hit the operating lever, etc., or an unexpected force is applied to the tip of the operating lever, damaging the operating device, etc. There was a risk of doing so.

  The present invention has been made based on the above-described matters, and its purpose is to operate a double-armed work machine that can appropriately change the gap between the gripping portions of the left and right operation levers when the driver gets on and off. A device is provided.

  In order to achieve the above object, a first invention includes a traveling body, a swiveling body provided so as to be able to swivel with respect to the traveling body, a cab provided in the swiveling body, and a left front portion of the swiveling body. In the operating device for a double-armed work machine having a left working arm provided on the right side and a right working arm provided on the right front portion of the revolving structure, it can swing around a vertical axis to the left side of the driver's seat. Left working arm operating means, right working arm operating means provided on the right side of the driver's seat so as to be swingable about a vertical axis, the left working arm operating means and the right working arm operating means. The left and right neutral position return springs connected to the respective rotation shafts, the lock lever provided in the driver's cab, the left working arm operating means and the right Swinging means for swinging the working arm operating means in the opposite opening direction. To.

  According to a second aspect of the present invention, in the first aspect of the invention, the swinging means includes first left and right gears respectively provided on the rotation shafts of the left working arm operating means and the right working arm operating means. The left and right second gears respectively meshing with the left and right first gears and the left and right second gears are connected to the rotation shafts, respectively, and in response to the locking operation of the lock lever. A left and right motor that is driven to swing the left working arm operating means and the right working arm operating means in opposite opening directions is provided.

  Further, according to a third aspect of the present invention, in the second aspect, the swinging means moves each of the rotation shafts of the left working arm operating means and the right working arm operating means in response to an unlocking operation of the lock lever. Left and right neutral position holding means for holding in the neutral position, and left and right holding positions of the left working arm operating means and the right working arm operating means operated in response to the locking operation of the lock lever. And an open position holding means.

  In a fourth aspect based on the first aspect, the swinging means is installed on the back of the driver's seat in the driving cabin, and the left working arm operating means and the right working arm operating means are opposed to each other. A motor that swings in the direction, a third gear provided on the output shaft of the motor, a left and right fourth gear that meshes with the third gear, and a left and right fourth gear, respectively. One end is wound around each of the left and right pulleys provided on each shaft and the left and right pulleys, and the other end is connected to the front end side of the left working arm operating means via the left and right guide pulleys, and It is characterized by comprising left and right wires respectively connected to the distal end side of the right working arm operating means.

  According to the present invention, in the operating device for a double-armed work machine, the gap between the gripping portions of the left and right operating levers can be appropriately changed when the driver gets on and off. As a result, the driver's getting-on / off operation becomes smooth, the getting-on / off operation is improved, and an unexpected accident such as injury or damage to the operation device can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a work machine to which a first embodiment of a dual-arm work machine operating device of the present invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of an operating device for a double-armed work machine according to the present invention. It is a perspective view which shows the drive part etc. of the left operating arm which comprises 1st Embodiment of the operating device of the double arm type work machine of this invention. FIG. 4 is an enlarged perspective view showing an engagement body constituting a drive unit of the left operation arm of FIG. 3. It is a perspective view which shows the drive part etc. of the right operation arm which comprise 1st Embodiment of the operating device of the double arm type work machine of this invention. It is a sequence circuit diagram in the drive part of the operating arm which comprises 1st Embodiment of the double arm type work machine of this invention. FIG. 4 is a perspective view illustrating a state in which a drive unit and the like of the left operation arm of FIG. 3 are locked open. It is a top view which shows 2nd Embodiment of the operating device of the double arm type work machine of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an operating device for a double-armed work machine according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing a working machine to which the first embodiment of the operating device for a double-armed working machine of the present invention is applied. As shown in FIG. 1, the double-arm type work machine has a traveling body 1 composed of a traveling body frame 1 a and an endless track crawler belt 1 b provided on each side of the traveling body frame 1 a, and turns on the traveling body 1. And a revolving body 2 attached in a possible manner. A driver's cab 3 is attached to the front left side of the swivel body 2. A power source device 4 including an engine and a hydraulic pump and a counterweight 5 are provided behind the revolving unit 2.

A first work arm 6 is installed at the front center portion of the swing body 2, and a second work arm 7 is mounted at the front left side of the swing body 2.
The first work arm 6 is mounted on the front right side of the revolving structure 2 so as to be able to move up and down (up and down) by the boom cylinder 61, and is pivoted to the tip of the first boom 62 by the arm cylinder 63 ( A first arm 64 provided so as to be movable up and down, and a first work tool 66 which is a splitter provided so as to be able to be rotated (moved up and down) by a work tool cylinder 65 at the tip of the arm 64, and is an articulated Has become a working arm. Thereby, the first work tool 66 at the tip of the first work arm 6 is movable in the vertical direction.
The first work arm 6 grips and fixes one member (waste) in which the member is embedded, for example, when gripping and transferring the waste, or when separating (stripping) the member in the waste. Used to hold or break apart demolished concrete walls.

  Next, at the base portion of the second working arm 7, a swinging device 8 is provided on the front left side of the swing body 2 and swings in the left-right direction.

  The second work arm 7 is provided on the front side of the swinging device 8 so as to be rotatable by a boom cylinder 71, and is provided at the tip of the second boom 72 so as to be rotatable by an arm cylinder 73. A second arm 74 and a second work tool 76 provided at the tip of the second arm 74 so as to be rotatable (up and down) by a work tool cylinder 75 are provided, and an articulated work arm is provided.

Accordingly, the second boom 72, the second arm 74, and the second work tool 76 in the second work arm 7 can be swung around the vertical axis by the swing device 8.
The second work arm 7 is used, for example, to separate a member embedded in the waste from the waste or to hold the concrete wall in a standing state when the member is pulled off. It is done.

  FIG. 2 is a perspective view showing a first embodiment of an operating device for a double-armed work machine according to the present invention. A driver's seat 49 shown in FIG. 2 is installed in the cab 3 of FIG. On the left and right sides of the driver's seat 49, there are an operating device 50a as a left working arm operating means corresponding to the second working arm 7, and an operating device 50b as a right working arm operating means corresponding to the first working arm 6. Is provided.

  The operating device 50a as the left work arm operating means includes an arm bracket 51a provided on the left side of the driver's seat 49, a rotating shaft 52a provided on the base side of the arm bracket 51a so as to be able to swing left and right, and An operating arm 53a attached to the moving shaft 52a and instructing the left and right swinging of the second working arm 7 and an armrest 54a attached so as to swing integrally with the operating arm 53a are provided.

  The operation device 50 a includes an operation lever 55 a that instructs the operation of the second work arm 7. The operation lever 55a is attached to the inside (the driver's seat 49 side) of the front end portion of the operation arm 53a so as to be swingable up and down, and the second working arm 7 has a second position corresponding to the operation direction of the swing operation. The two arms 74 are configured to indicate the operation direction of the tip (see FIG. 1). In addition, the operation lever 55a is configured to be rotatable around its axis 56, and instructs the second work tool 76 to rotate up and down according to the operation direction of the rotation operation.

  On the other hand, the operating device 50b as the right working arm operating means for operating the first working arm 6 on the right side is configured in the same manner as the operating device 50a on the right side of the driver seat 49, and the same member includes the operating device 50a. A description of the subscripts of the respective members is omitted by replacing “a” with “b”.

  Further, the pilot pressure oil to each actuator for driving the first and second work arms 6 and 7 is shut off in the cab 3 on the left side of the operating device 50a as the left work arm operation means. A lock lever 100 that locks the operation is provided.

  Next, the drive part of the operating arm which constitutes the first embodiment of the operating device for the double-arm type work machine of the present invention will be described in detail with reference to the drawings. FIG. 3 is a perspective view showing a left operating arm drive unit and the like constituting the first embodiment of the dual-arm working machine operating device of the present invention, and FIG. 4 shows the left operating arm drive unit of FIG. It is a perspective view which expands and shows the engaging body to perform. 3 and 4, the same reference numerals as those shown in FIGS. 1 and 2 are the same or corresponding parts, and the description of those parts is omitted.

  In FIG. 3, the arm bracket 51 a constituting the operating device 50 a is formed of a plate member formed in an E shape in a side view. The arm bracket 51a includes an upper surface portion 511a having a rectangular shape when viewed from above, and similarly has a lower surface portion 512a having a rectangular shape when viewed from above. An upright portion 513a is provided inside the upper surface portion 511a and the lower surface portion 512a. The upper end of the upright portion 513a and one side of the upper surface portion 511a as viewed from above are perpendicular to each other when viewed from the side. Similarly, the lower end of the upright portion 513a and one side of the lower surface portion 512a of the rectangle in a top view are perpendicular to each other in a side view. One side of the intermediate surface portion 514a that is rectangular in a top view is joined to the lower inner surface of the upright portion 513a at a right angle in a side view. As shown in FIG. 2, the upright direction of the upper surface portion 511 a, the lower surface portion 512 a, and the intermediate surface portion 514 a formed so as to stand upright on the upright portion 513 a is arranged as the front side direction of the driver seat 43.

  A cylindrical body 515a through which the upper end side of the rotation shaft 52a is inserted and penetrated is provided at a substantially central portion of the upper surface portion 511a. Similarly, a cylindrical body 516a into which the lower end side of the rotation shaft 52a is inserted and penetrated is provided at a substantially central portion of the intermediate surface portion 514a. In addition, a potentiometer 80a for detecting the amount of swing of the operation arm 53a is disposed at a substantially central portion on the upper side surface of the lower surface portion 512a, and the drive shaft of the potentiometer 80a and the central portion of the rotating shaft 52a are connected. . Furthermore, an engagement body bracket 82a for holding an engagement body 81a described later is disposed at the front end portion of the upper surface of the lower surface portion 512a.

  A spring coupling bracket 90a is provided on the rotation shaft 52a. Between the spring connection bracket 90a and the front side of the upright portion 513a, neutral return springs 83a and 84a for holding the operation arm 53a in the neutral position are disposed, respectively. A motor bracket 85a for supporting the motor 86a is disposed on the front side surface of the upright portion 513a below the springs 83a and 84a.

  The motor 86a includes a motor casing 861a whose outer periphery is held by a motor bracket 85a, and a motor drive shaft 862a. A drive gear 87a is provided on the tip side of the motor drive shaft 862a.

  As shown in FIGS. 3 and 4, the rotation shaft 52a is coupled to an upper beam 531a constituting an operation arm 53a, which will be described later, on the upper end side of the upper surface portion 511a of the arm bracket 51a penetrating the cylinder 515a. Further, it is coupled to a lower beam 532a constituting an operation arm 53a described later on the lower end side and above the cylinder 516a of the intermediate surface portion 514a of the arm bracket 51a. Furthermore, it connects with the drive shaft of the potentiometer 80a in the lower end part which penetrated the cylinder 516a of the intermediate surface part 514a.

  In the rotating shaft 52a, a connecting bracket 90a and a driven gear 91a are mounted from above on a portion between a portion coupled to the upper beam 531a and a portion coupled to the lower beam 532a. The connection bracket 90a has a substantially elliptical shape, and the shaft center is arranged in the same manner as the rotation shaft 52a. The spring holes 83a and 84a are connected to the ends of the long diameter side of the ellipse. . The driven gear 91a is arranged so that its axis is the same as the rotation shaft 52a and engages with a drive gear 87a provided at the tip of the motor drive shaft 862a of the motor 86a.

  Here, the springs 83a and 84a and the connecting bracket 90a constitute the neutral position holding means 10 that holds the rotating shaft 52a in the neutral position. When there is no opening / closing operation by the driver to the operation arm 53a, the neutral position holding means 10 holds the rotating shaft 52a and the operation arm 53a in the neutral position. Further, the motor 86a, the drive gear 87a, and the driven gear 91a constitute the swinging means 11, and when the predetermined condition described later is satisfied, the rotating shaft 52a is driven, thereby opening the operation arm 53a in the opening direction. Is swinging.

  As shown in FIGS. 3 and 4, the operation arm 53a is formed of a frame member having a rectangular cross section. The operation arm 53a is coupled to the upper end side and the rear end portion of the rotating shaft 52a and extends to the front side. A lower beam 532a that is coupled in the vicinity of the lower end side and the rear end portion of the moving shaft 52a and extends to the front side, and a front beam 533a that is coupled to the front end portion of the lower beam 532a and that extends to the front side obliquely upward. I have. The front beam 533a is coupled to the front end portion of the upper beam 531a at a substantially middle portion thereof, and is coupled to the connection bracket 551a of the operation lever 55a at the front end portion thereof.

  An armrest 54a is arranged on the upper surface of the upper beam 531a so that the center point thereof is the same as the axis of the rotation shaft 52a.

  A pressing portion 534a for pressing a pressure receiving portion 921a of an open position detection limit switch 92a, which will be described later, is provided outside the upper surface of the lower beam 532a. Further, as shown in FIG. 4, an engagement groove 535a that engages with the engagement body 81a is provided from the lower surface to the outer surface of the lower beam 532a. The blank portion of the engagement groove 535a has a triangular prism shape, and the vertices of the cross-sectional triangle are arranged at the lower surface, the outer surface, and the intersection between the lower surface and the outer surface of the lower beam 532a. The engagement groove 535a has a slope 536a that continues from the lower surface of the lower beam 532a to the outer surface.

  The engaging body 81a has a trapezoidal square-shaped engaging portion 811a having a sliding surface slidable with the inclined surface portion 536a of the engaging groove 535a, and a drive in which the upper end is joined to the center of the lower surface of the engaging portion 811a. A shaft 812a and a spring stopper member 813a provided in a radially projecting manner at a substantially intermediate portion in the axial direction of the drive shaft 812a are provided.

  The engagement body bracket 82a is a plate member formed in an F shape when viewed from the side, and has a lower end portion fixed to a front end portion on the upper side surface of the lower surface portion 512a of the arm bracket 51a. A hole through which the drive shaft 812a passes is formed in the upper surface portion 821a and the intermediate surface portion 822a forming the F-shape, and a compression spring 823a is provided between the intermediate surface portion 822a and the spring stopper member 813a of the drive shaft 812a. Yes. A wire 106 to be described later is joined to the lower end of the drive shaft 812a.

  Here, the engaging body 81a, the engaging groove 535a, and the wire 106 constitute an open position holding means 12, and when a predetermined condition described later is satisfied, the engaging body 81a is operated and opened by the swinging means 11. The operation arm 53a swinging in the direction is prevented from being closed and the open position is maintained.

  The lock lever 100 is a lever portion 101 formed of a rod-shaped member, a plate member having a triangular shape in a side view, a connecting body 102 in which a base end portion of the lever portion 101 is joined to the outer side surface, and an operating position ( And a lock lever limit switch 103 for detecting a pull-up position (lock position) / push-down position (lock release position).

  The lever portion 101 is provided with a bent portion at a substantially intermediate portion in the axial direction, and is formed in a reverse shape. A lever grip portion 101x is provided on the front end side disposed on the front side of the driver seat 49.

  As shown in FIGS. 2 and 3, the connecting body 102 is disposed upright so that two long sides of the side view triangle are on the bottom side and the upper side, and one short side is on the rear side. The pressure receiving portion 103x of the lock lever limit switch 103 is disposed on the rear side of the two short sides. Here, one short side portion of the triangular shape of the coupling body 102 constitutes a pressing portion 107 for pressing the pressure receiving portion 103x. Further, a fulcrum 104 is provided in the lower part on the rear side of the side surface of the coupling body 102, and a wire fastening part 105 is provided in the upper part on the rear side of the side surface. One end side of the wire 106 is fastened to the wire fastening portion 105.

  When the gripping portion 101x of the lock lever 100 is pulled upward, the coupling body 102 rotates up and down around the fulcrum 104. 2 and 3 show a state in which the lock lever 100 is pushed down (released state). At this time, the pressure receiving portion 103x of the lock lever limit switch 103 is not pressed by the pressing portion 107, and the engagement body 81a is not pressed. The drive shaft 812a compresses the compression spring 823a by the downward tension from the wire 106 and moves downward. As a result, the engaging body 81a is located below the engaging groove 535a.

  The lock lever 100 is disposed only on the left side of the driver seat 49. Therefore, in the drive part of the left and right operation arms, signal interaction with the lock lever 100 is different. The drive unit and the like of the right operation arm will be described with reference to FIGS. FIG. 5 is a perspective view showing a drive unit of the right operating arm constituting the first embodiment of the operating device for the double-armed work machine of the present invention, and FIG. 6 is an operating device for the double-armed working machine of the present invention. It is a sequence circuit diagram in the drive part of the operation arm which comprises the 1st embodiment. 5 and 6, the same reference numerals as those shown in FIGS. 1 to 4 are the same or corresponding parts, and the description of those parts is omitted.

  The operating device 50b as the right working arm operating means shown in FIG. 5 is attached to the arm bracket 51b provided on the right side of the driver's seat 49, and attached to the arm bracket 51b so as to be swingable left and right around the rotation shaft 52b. An operation arm 53b for instructing the left and right swing of one work arm 6, an armrest 54b attached to the operation arm 53b so as to swing integrally, and an operation lever for instructing the operation of the first work arm 6. 55b.

  In the arm bracket 51a constituting the operating device 50a as the left working arm operating means, the lower end of the drive shaft 812a of the engaging body 81a is joined to the connecting body 102 of the lock lever 100 via the wire 106. An electromagnetic coil 110 that drives the drive shaft 812b in the vertical direction is disposed at the lower end of the drive shaft 812b of the engagement body 81b in the arm bracket 51b constituting the device 50b. The electromagnetic coil 110 is controlled to be excited / de-energized by a sequence circuit described later, and moves the drive shaft 812b downward or upward depending on the presence or absence of the downward tension at this time.

  In other words, in the operating device 50b as the right working arm operating means, the opening position holding means 12 is constituted by the engaging body 81b, the engaging groove 535b, and the electromagnetic coil 110, and when a predetermined condition described later is satisfied. The engaging body 81b is actuated to prevent the operation arm 53b swung in the opening direction by the swinging means 11 and to keep the open position.

  The predetermined conditions will be described with reference to FIG. In the sequence circuit shown in FIG. 6, M86a and M86b indicate a motor 86a and a motor 86b. When a voltage is applied to both ends of M86a and M86b, the motors 86a and 86b are driven. When the applied voltage is released, the motors 86a and 86b are stopped. C110 indicates the electromagnetic coil 110, which is excited when a voltage is applied to both ends of C110, and moves the drive shaft 812b of the engaging body 81b downward.

  In FIG. 6, 103xa indicates an A contact provided in the lock lever limit switch 103, and 103xb indicates a B contact. Here, 103xa is closed when the lock lever 100 is pulled up and disposed at the lock position (when the pressure receiving portion 103x of the lock lever limit switch 103 is pressed by the pressing portion 107 of the coupling body 102), and otherwise. Opening at 103xb is the reverse of 103xb.

  Furthermore, 92ab and 92bb indicate B contacts provided on the open position detection limit switches 92a and 92b. Here, 92ab and 92bb are operated when the operation arms 53a and 53b are operated in the outward opening direction and arranged at the open position (the pressure receiving portions 921a and 921b of the open position detection limit switches 92a and 92b are the lower beams 532a). , 532b is pressed by the pressing portions 534a, 534b), and is closed otherwise.

  Next, the operation of the first embodiment of the operating device for a double-armed work machine according to the present invention will be described with reference to FIGS. FIG. 7 is a perspective view showing a state in which the drive unit and the like of the left operation arm in FIG. 3 are locked open. In FIG. 7, the same reference numerals as those shown in FIGS. 1 to 6 are the same or corresponding parts, and the description thereof is omitted.

  For example, when a driver sitting on the driver's seat 49 in the cab 3 of the double-armed work machine shown in FIG. 2 gets off the vehicle, the driver first raises the lock lever 100 on the left side of the driver's seat 49 to the position where To operate. By pulling up the lock lever 100, pilot pressure oil (not shown) to the actuators that drive the first and second work arms 6 and 7 is shut off to invalidate the command signal.

  In addition, when the lock lever 100 is pulled up, the pressure receiving portion 103x of the lock lever limit switch 103 shown in FIG. 3 is pressed by the pressing portion 107 to turn on the lock lever limit switch 103. Further, since the wire fastening portion 105 of the coupling body 102 moves upward, the tension of the wire 106 joining the wire fastening portion 105 and the drive shaft 812a of the engaging body 81a is loosened, and the compressed compression spring 823a is compressed. The engaging body 81a moves upward by the extension force.

  When the lock lever limit switch 103 is turned ON, the A contact 103xa shown in FIG. 6 is closed and the B contact 103xb is opened. At this time, B-contacts 92ab and 92bb provided on the open position detection limit switches 92a and 92b are closed because the operation arms 53a and 53b are in the neutral position.

  As a result, first, the voltage applied to both ends of C110, which is an electromagnetic coil, is released, becomes non-excited, and moves the drive shaft 812b of the engagement body 81b shown in FIG. 5 upward.

  Returning to FIG. 6, since voltages are applied to both ends of the motor 86a and the motor 86b, M86a and M86b, the motors 86a and 86b are respectively driven, and the driving gears 87a and 87b and the driven gears which are the swinging means 11 are driven. 91a, 91b swings the rotation shafts 52a, 52b, so that the operation arms 53a, 53b are expanded in the outward opening direction, respectively. When the operation arms 53a and 53b move in the opening direction, the engaging bodies 81a and 81b move upward, but the sliding surfaces of the engaging bodies 81a and 81b and the inclined surfaces 536a and 536b of the engaging grooves 535a and 535b slide. Since it opposes so that movement is possible, the open operation of operation arms 53a and 53b is not disturbed.

  When the operating arms 53a and 53b are moved in the outward opening direction and the pressure receiving portions 921a and 921b of the open position detection limit switches 92a and 92b are pressed by the pressing portions 534a and 534b of the lower beams 532a and 532b, the open position is detected. Limit switches 92a and 92b are turned on.

  When the open position detection limit switches 53a and 53b are turned ON, the B contacts 92ab and 92bb shown in FIG. 6 are opened. As a result, the voltages at both ends of M86a and M86b are released, and the motors 86a and 86b are stopped. As a result, the neutral position holding means 10 constituted by the springs 83a, 84a, 83b, 84b and the connecting brackets 90a, 90b causes the rotation shafts 52a, 52b and the operation arms 53a, 53b to close in the neutral position side. The force that rotates to try to act.

  However, in this case, the lower beams 532a and 532b of the operation arms 53a and 53b are positioned outward in the opening direction from the positions of the upward movements of the engaging bodies 81a and 81b constituting the opening position holding means 12, as shown in FIG. Therefore, the closing operation of the operation arms 53a and 53b is prevented and the open position is held. As a result, the operation arms 53a and 53b are held open.

  Thus, a space is formed between the distal end side of the operating lever 55a of the operating device 50a as the left working arm operating means and the distal end side of the operating lever 55b of the operating device 50b as the right working arm operating means. Therefore, the driver can get off the vehicle without obstructing the front ends of the left and right operation levers 55a and 55b.

  On the other hand, when the driver gets on, the driver first operates the lock lever 100 on the left side of the driver seat 49 to the depressed position. By depressing the lock lever 100, pilot pressure oil (not shown) is supplied to each actuator that drives the first and second work arms 6 and 7, and the command signal is validated.

  Further, since the engaging members 81a and 81b are moved downward and the open position holding means 12 is released by the pressing operation of the lock lever 100, the operating arm is operated by the restoring force of the springs 83a and 83b of the neutral position holding means 10. 53a, 53b swings inward (closed direction) about the rotation shafts 52a, 52b of the base and returns to the neutral position.

  According to the first embodiment of the operating device for a double-armed work machine of the present invention described above, in the operating device for a double-armed working machine, when the driver gets on and off, it is between the left and right operating levers 55a and 55b. The air gap can be changed appropriately. As a result, the driver's getting-on / off operation becomes smooth, the getting-on / off operation is improved, and an unexpected accident such as injury or damage to the operation device can be prevented.

  A second embodiment of the operating device for a double-armed work machine according to the present invention will be described below with reference to the drawings. FIG. 8 is a top view showing a second embodiment of the operating device for a double-armed work machine according to the present invention. In FIG. 8, the same reference numerals as those shown in FIG. 1 to FIG. For the sake of drawing, the left working arm operating means 50a and the right working arm operating means 50b are operated in response to the pushing operation of the lock lever 100, the lock lever limit switch 103, and the lock lever 100 described in the first embodiment. The neutral position holding means 10 for holding the base side in the neutral position, and the open position holding for holding the open positions of the left work arm operation means 50a and the right work arm operation means 50b operated in response to the lowering operation of the lock lever 100. The means 12 is omitted.

  In the present embodiment, in response to the pulling-up operation of the lock lever 100, the directions opposite to the distal ends of the operating device 50a as the left working arm operating means and the operating device 50b as the right working arm operating means (opening direction) ) Using a wire and a wire winding mechanism.

  Specifically, the swinging means 11 is driven in response to the lifting operation of the lock lever 100, and the operating device 50a as the left working arm operating means and the operating device 50b as the right working arm operating means conflict. A motor 20 that swings in the direction (opening direction) is provided. The motor 20 is installed behind the driver seat 49 in the cab 3.

  The output shaft of the motor 20 is provided with a third gear 23 that meshes with a left fourth gear 21 and a right fourth gear 22 described later. The left fourth gear 21 and the right fourth gear 22 are installed behind the driver seat 49 in the cab 3.

  A left pulley 24 and a right pulley 25 are respectively provided on the shafts of the right fourth gear 21 and the right fourth gear 22. One end of a left wire 26 and a right wire 27 is wound around the left pulley 24 and the right pulley 25, respectively.

  The other ends of the left wire 26 and the right wire 27 are connected to the distal end side of the operating device 50a as the left working arm operating means via the left and right guide pulleys 28 and 29, and the operating device as the right working arm operating means. It is connected to the tip side of 50b.

  One end of the left wire 26 and the right wire 27 is wound around the left pulley 24 and the right pulley 25 when the left pulley 24 and the right pulley 25 are rotated in the counterclockwise direction in this example. So that each is wound.

Next, the operation in the above-described embodiment will be described.
For example, when a driver getting in the cab 3 of the double-armed work machine gets off, the driver operates the lock lever 100 at the left side of the driver seat 49 to perform a locking operation. By operating the lock lever 100 to the raised position, the lock lever limit switch 103 is turned ON.

  When the lock lever limit switch 103 is turned ON, the motor 20 rotates in the hour hand direction in FIG. 8 and similarly rotates the third gear 23 in the hour hand direction. Since the rotation of the third gear 23 in the hour hand direction is transmitted to the left and right fourth gears 21 and 22, the left and right fourth gears 21 and 22 are springs 83a, It rotates in the counterclockwise direction in the drawing against the restoring force of 84a, 83b, 84b. The left pulley 24 and the right pulley 25 wind up the left wire 26 and the right wire 27, respectively, by the rotation of the left and right fourth gears 21 and 22 in the counterclockwise direction. The distal end side of the operating lever 55a of the operating device 50a as the means and the distal end side of the operating lever 55b of the operating device 50b as the right working arm operating means are outward (centering on the rotation shafts 52a and 52b of the respective bases) It swings in the opening direction) and stops, and is held open by the opening position holding means 12.

  Thus, a space is formed between the distal end side of the operating lever 55a of the operating device 50a as the left working arm operating means and the distal end side of the operating lever 55b of the operating device 50b as the right working arm operating means. Therefore, the driver can get off the vehicle without obstructing the front ends of the left and right operation levers 55a and 55b.

  On the other hand, considering the situation after the driver gets on, the driver first operates the lock lever 100 on the left side of the driver seat 49 to the depressed position to release the lock. As a result, the open position holding means 12 is released, so that the operating arms 53a and 53b are moved inward (closed) around the rotation shafts 52a and 52b of the base by the restoring force of the springs 83a and 83b of the neutral position holding means 10. ) And return to the neutral position.

  According to the second embodiment of the operating device for a double-armed work machine of the present invention described above, the same effect as that of the first embodiment described above can be obtained, and the swinging means 11 is configured. Since the number of driving motors can be reduced, reliability and maintainability can be improved.

  In the embodiment of the present invention, the mode in which the lock lever 100 is pulled up to be locked and pushed down to be unlocked has been described. However, the present invention is not limited to this. Even in the case of a lock lever having the reverse operation, the present invention can be applied if the lock position and the unlock position can be detected by the limit switch.

DESCRIPTION OF SYMBOLS 1 Running body 2 Revolving body 3 Driver's cab 5 Counterweight 6 1st work arm (right work arm)
7 Second work arm (left work arm)
DESCRIPTION OF SYMBOLS 10 Neutral position holding means 11 Swing means 12 Open position holding means 49 Driver's seat 50a, 50b Operating device (working arm operating means)
51a, 51b Arm bracket 52a, 52b Rotating shaft 53a, 53b Operating arm 54a, 54b Armrest 81a, 81b Engagement body 83a, 83b Spring 84a, 84b Spring 86a, 86b Motor 87a, 87b Drive gear (second gear)
91a, 91b driven gear (first gear)
100 lock lever 106 wire 110 electromagnetic coil

Claims (4)

A traveling body, a revolving body provided so as to be able to swivel with respect to the traveling body, a driver's cab provided on the revolving body, a left working arm provided on a left front portion of the revolving body, and a right front portion of the revolving body. In the operating device of the double arm type work machine provided with the provided right work arm,
A left working arm operating means provided on the left side of the driver's seat so as to be swingable around a vertical axis;
A right working arm operating means provided on the right side of the driver seat so as to be swingable around a vertical axis;
Springs for returning the left and right neutral positions respectively connected to the respective rotation shafts of the left working arm operating means and the right working arm operating means;
A lock lever provided in the cab;
And a swinging means for swinging the left working arm operating means and the right working arm operating means in opposite directions in response to a locking operation of the lock lever. Machine operating device. In the operating device of the double-arm type work machine according to claim 1,
The swinging means is
Left and right first gears respectively provided on the respective rotation shafts of the left work arm operation means and the right work arm operation means;
Left and right second gears respectively meshing with the left and right first gears;
Opening directions that are respectively coupled to the rotation shafts of the left and right second gears and that are driven in response to the locking operation of the lock lever, causing the left work arm operation means and the right work arm operation means to conflict with each other. An operating device for a double-armed work machine, characterized in that it is equipped with left and right motors that swing on the left and right. In the operating device of the double-arm type work machine according to claim 2,
The swinging means is
In response to the unlocking operation of the lock lever, the left and right neutral position holding means for holding the rotation shafts of the left work arm operation means and the right work arm operation means in neutral positions, respectively.
The left working arm operating means operated in response to the locking operation of the lock lever and the left and right open position holding means for holding the open position of the right working arm operating means are further provided. Operating device for arm type work machine. In the operating device of the double-arm type work machine according to claim 1,
The swinging means is
A motor installed on the back of the driver's seat in the driving cabin and swinging the left working arm operating means and the right working arm operating means in opposite directions;
A third gear provided on the output shaft of the motor;
Left and right fourth gears respectively meshing with the third gear;
Left and right pulleys respectively provided on the respective shafts of the left and right fourth gears;
One of the left and right pulleys is wound around one end, and the other end is connected to the distal end side of the left working arm operating means and the distal end side of the right working arm operating means via left and right guide pulleys. -An operating device for a double-armed work machine, characterized by having a right wire.

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