JP2009097303A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance workability when moving a working apparatus into a traveling attitude. <P>SOLUTION: Cylinders 15, 16, 17 of the working apparatus are provided with stroke detecting means 18, 19, 20 respectively. A cab 21 is provided inside with a boom display 31 lighted when the stroke detecting means 18 detects the traveling attitude of a boom 12; an arm display 32 lighted when the stroke detecting means 19 detects the traveling attitude of an arm 13; and a bucket display 33 lighted when the stroke detecting means 20 detects the traveling attitude of a bucket 14. Consequently, an operator can adjust the strokes of the respective cylinders 15, 16, 17 by operating levers 28A, 29A while confirming the traveling attitudes of the boom 12, arm 13 and bucket 14 by the respective displays 31, 32, 33. The workability in moving the working apparatus 11 into the traveling attitude can thereby be enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction machine including a wheel-type lower traveling body such as a wheel-type hydraulic excavator.

  In general, as a typical example of a construction machine including a wheel-type lower traveling body, a wheel-type hydraulic excavator that is suitably used for excavation work such as earth and sand is known. This wheel-type hydraulic excavator is usually a self-propelled wheel-type lower traveling body having left and right front wheels and left and right rear wheels, and an upper revolving body provided on the lower traveling body so as to be able to turn. And a working device provided on the upper revolving body so as to be able to move up and down.

  And since the wheeled hydraulic excavator can be self-propelled on the public road to the work site by the wheel-type lower traveling body without being loaded on a trailer or the like and transported quickly after arrival at the work site Excavation work using the working device can be performed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 62-27555

  By the way, the working device mounted on the wheel-type hydraulic excavator described above has a boom whose base end side is rotatably attached to the upper swing body and changes its posture according to the stroke of the boom cylinder, and is rotated to the tip end side of the boom. An arm that is movably mounted and changes its posture according to the stroke of the arm cylinder, and a work tool such as a bucket that is rotatably attached to the tip side of the arm and changes its posture according to the stroke of the work tool cylinder. It is configured.

  Here, when a wheel-type hydraulic excavator travels on a public road, the posture of the boom, arm, and work tool constituting the work device is moved to a posture (running posture) that can safely travel on the public road. It is necessary to keep the height and length dimensions of the entire wheeled hydraulic excavator including the device within the specified dimensions.

  For this reason, in the wheel-type hydraulic excavator according to the prior art, an alignment mark is usually provided at a position corresponding to the stroke of the boom cylinder when the boom is in the traveling posture, and the stroke of the arm cylinder when the arm is in the traveling posture. An alignment mark is provided at a position corresponding to, and an alignment mark is provided at a position corresponding to the stroke of the work tool cylinder when the work tool is in the running posture.

  When the working device is in the traveling posture, the operator operates the operating lever for the working device to move the boom to the traveling posture while looking at the boom cylinder alignment mark, and see the arm cylinder alignment mark. While moving the arm to the traveling posture, the working tool is moved to the traveling posture while looking at the alignment mark on the working tool cylinder.

  However, in the above-described conventional technology, the operator determines whether or not the boom has moved to the traveling posture by visually observing the alignment mark provided on the boom cylinder. Similarly, it is determined whether or not the arm has been moved to the traveling posture by visually observing the alignment mark provided on the arm cylinder, and the work tool is moved by visually observing the alignment mark provided on the work tool cylinder. It is determined whether or not it has moved to a posture.

  Therefore, when moving the working device to the running posture, the operator operates the operation lever of the working device while visually observing the alignment mark provided on each cylinder, so that the boom, the arm, and the work implement are each in the running posture. It is necessary to move to.

  In this case, the alignment mark for the boom cylinder that is close to the driver's seat can be viewed by the operator operating the control lever, but the alignment mark for the arm cylinder and work implement cylinder that is located away from the driver's seat is It is difficult for the operator to visually observe the operation lever.

  Therefore, in order to visually check the alignment mark of the arm cylinder, the operator gets out of the driver's seat and moves to the vicinity of the arm cylinder, and then operates the arm operating lever again to move the arm to the running posture, and In order to visually check the alignment mark of the work tool cylinder, it is necessary to move the work tool to the running posture again by operating the operation lever for the bucket after getting out of the driver's seat and moving to the vicinity of the work tool cylinder. . As a result, a great amount of time is required to move the working device to the traveling posture, and there is a problem that workability is deteriorated.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine that can improve workability when the working device is moved to the traveling posture.

  In order to solve the above-described problems, the present invention provides a self-propelled lower traveling body, an upper revolving body that is turnable on the lower traveling body, and a lower revolving body that is provided on the upper revolving body so as to be able to move up and down. A working device having a predetermined traveling posture during traveling of the traveling body, the working device having a base end rotatably attached to the upper swing body and operated by a boom cylinder; and a tip of the boom The present invention is applied to a construction machine constituted by an arm that is pivotally attached to the side and is operated by an arm cylinder, and a work tool that is pivotally attached to the tip side of the arm and is actuated by a work tool cylinder.

  A feature of the configuration adopted by the invention of claim 1 is that stroke detecting means for detecting the strokes of the boom cylinder, the arm cylinder, and the work tool cylinder, respectively, and strokes of the cylinders detected by the stroke detecting means. There is provided an informing means for informing the operator that the working device is in the traveling posture.

  According to a second aspect of the present invention, a travel posture switch that is turned on when the working device is placed in a travel posture is provided, and the notification means is configured to operate when the travel posture switch is turned on. is there.

  According to a third aspect of the present invention, the upper swing body has a driver seat where an operator is seated when operating the cylinders by operating means, and the notification means is in a position where the operator seated in the driver seat can be notified. There is a configuration to provide.

  According to a fourth aspect of the present invention, the notifying means is provided on the boom cylinder indicator that is turned on when the stroke detecting means provided on the boom cylinder detects that the boom is in a running posture, and the arm cylinder. When the stroke detecting means detects that the arm is in a running posture, the arm indicator that is turned on, and the stroke detecting means provided on the work tool cylinder causes the working tool to be in a running posture. And a working tool display that is turned on when the light is detected.

  The invention of claim 5 is a self-propelled wheel-type traveling body having left and right front wheels and left and right rear wheels, a revolving structure provided on the wheel-type traveling body so as to be capable of turning, and the turning A cab that is provided on the body and that defines a cab, and a working device that is provided on the swivel frame so as to be able to be raised and lowered, and has a predetermined running posture when the lower traveling body is running. A boom whose end side is pivotally attached to the revolving frame and operated by a boom cylinder, an arm that is pivotally attached to the distal end side of the boom and is operated by an arm cylinder, and pivotable on the distal end side of the arm In a construction machine configured by a work tool that is mounted and operated by a work tool cylinder, a boom that detects the strokes of the boom cylinder, the arm cylinder, and the work tool cylinder, respectively. Roke detecting means is provided, and in the cab, notifying means for notifying that the boom, the arm, and the work tool are in the traveling posture based on the stroke of each cylinder detected by each stroke detecting means. It is characterized by having a configuration of providing.

  According to the first aspect of the present invention, the stroke of the boom cylinder, the arm cylinder, and the work tool cylinder is detected by the stroke detection means, and the notification means notifies the operator based on the stroke of each cylinder detected by the stroke detection means. It can be informed that the working device is in the traveling posture. Thus, since the operator can notify the operator whether or not the working device is in the traveling posture, the operator can observe the stroke of each cylinder while visually observing the boom cylinder, the arm cylinder, and the work implement cylinder. There is no need to adjust. As a result, the working device can be easily moved to the running posture in a short time, and the workability can be improved.

  According to the invention of claim 2, when the working device is performing excavation work or the like, the traveling posture switch is not turned on. Even if any of these is temporarily in the traveling posture, the notification means does not operate. Thereby, it can suppress that an alerting | reporting means act | operates unexpectedly at the time of excavation work using a working device, and an operator can perform excavation work smoothly.

  According to the invention of claim 3, the operator who is seated in the driver's seat operates the boom cylinder, the arm cylinder, and the work tool cylinder by the operation means, thereby moving the work device to the traveling posture, and from the notification means. It is possible to accurately determine whether or not the working device has moved to the traveling posture by the notification.

  According to the invention of claim 4, the operator can determine that the boom has moved to the traveling posture by turning on the boom indicator while adjusting the stroke of the boom cylinder. When the indicator for the arm is turned on while adjusting the arm, it can be determined that the arm has moved to the running posture, and the indicator for the work tool is lit while adjusting the stroke of the work tool cylinder. It can be determined that the work tool has moved to the traveling posture. In this way, the operator can operate each cylinder while checking one by one whether the boom, the arm, and the work tool constituting the work device have moved to the running posture. The work of moving to a posture can be performed efficiently, and the workability can be further enhanced.

  According to invention of Claim 5, the stroke of a boom cylinder, an arm cylinder, and a working tool cylinder is detected by the stroke detection means provided in each cylinder, Based on the detected stroke of each cylinder, a boom, an arm, and The operator can be notified by the notifying means provided in the cab that the work tool is in the running posture. Therefore, the operator who adjusts the stroke of each cylinder in the cab can determine that the boom, the arm and the work tool have moved to the traveling posture by the notification means, and the workability when moving the working device to the traveling posture is improved. Can be increased.

  Hereinafter, an embodiment of a construction machine according to the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the construction machine is applied to a wheel-type hydraulic excavator.

  In the figure, reference numeral 1 denotes a wheel-type hydraulic excavator. The wheel-type hydraulic excavator 1 has a wheel-type traveling body 2 as a lower traveling body, and the wheel-type traveling body 2 travels on a public road, thereby excavating work and the like. It can be self-propelled to the work site where

  Here, the wheel-type traveling body 2 includes a chassis 3 as a base, left and right front wheels 4 (only shown on the left side) rotatably provided on the chassis 3, and left and right rear wheels 5 (only the left side). (Illustrated). The wheel-type traveling body 2 is capable of self-propelled on a public road by rotationally driving the left and right front wheels 4 and the left and right rear wheels 5 with a hydraulic motor (not shown). . In addition, a turning wheel 6 is provided on the upper surface side of the central portion of the chassis 3, and an upper turning body 7 described later is attached on the turning wheel 6.

  Reference numeral 7 denotes an upper swing body that is turnably provided on the wheel-type traveling body 2 via the swivel wheel 6. The upper swing body 7 is mounted on the swivel wheel 6 and is rotated by a swivel device (not shown). The vehicle turns on the traveling body 2.

  Here, the upper revolving structure 7 includes a revolving frame 8 that forms a support structure, a cab 21 that will be described later provided on the left side of the front of the revolving frame 8, and a counterweight provided on the rear end side of the revolving frame 8. 9 and a building cover 10 that is provided on the front side of the counterweight 9 and houses equipment (not shown) such as an engine and a heat exchanger. In addition, a bracket 8A is provided on the front side of the swivel frame 8 so as to protrude in a mountain shape facing the left and right directions, and a working device 11 described below is attached to the bracket 8A so as to be able to move up and down. It has become.

  11 is a work device provided on the front side of the upper swing body 7 so as to be able to be lifted and lowered. As shown in FIGS. 3 and 4 and the like, the work device 11 is rotated to the bracket 8A of the swing frame 8 at the base end side. A boom 12 that is movably pin-coupled, an arm 13 that is pivotally pin-coupled to the distal end side of the boom 12, and a bucket as a work tool that is pivotally pin-coupled to the distal end side of the arm 13 14 and a boom cylinder 15, an arm cylinder 16, and a bucket cylinder 17 which will be described later.

  A boom cylinder 15 is provided between the bracket 8A and the boom 12. The boom cylinder 15 includes a tube 15A, a piston (not shown) slidably provided in the tube 15A, and the piston. The proximal end side is fixed, and the distal end side is constituted by a rod 15B protruding from the tube 15A. The boom cylinder 15 moves the boom 12 up and down with respect to the bracket 8A by expanding and contracting the rod 15B with respect to the tube 15A, and the posture of the boom 12 changes according to the expansion and contraction stroke of the boom cylinder 15. It is the composition to do.

  Reference numeral 16 denotes an arm cylinder provided between the boom 12 and the arm 13, and the arm cylinder 16 is also composed of a tube 16A, a piston (not shown), a rod 16B, and the like. The arm cylinder 16 rotates the rod 16B with respect to the tube 16A to rotate the arm 13 on the distal end side of the boom 12, and the posture of the arm 13 depends on the expansion / contraction stroke of the arm cylinder 16. It has a changing structure.

  Reference numeral 17 denotes a bucket cylinder as a working tool cylinder provided between the arm 13 and the bucket 14, and the bucket cylinder 17 is also composed of a tube 17A, a piston (not shown), a rod 17B, and the like. The bucket cylinder 17 rotates the bucket 17 on the distal end side of the arm 13 by expanding and contracting the rod 17B with respect to the tube 17A, and the posture of the bucket 14 is changed according to the expansion and contraction stroke of the bucket cylinder 17. It has a changing structure.

  As described above, the working device 11 including the boom 12, the arm 13, the bucket 14, the boom cylinder 15, the arm cylinder 16, the bucket cylinder 17 and the like operates the operation levers 28A and 29A described later to operate the cylinders 15 and 16 respectively. , 17 by adjusting the stroke, for example, as shown in FIGS. 1 and 3, the working posture when the wheeled excavator 1 performs excavation work and the like, and as shown in FIGS. 2 and 4, the wheel type The posture of the excavator 1 is freely changed between the traveling posture when the hydraulic excavator 1 travels on a public road.

  Reference numeral 18 denotes stroke detecting means provided in the boom cylinder 15. The stroke detecting means 18 is configured to check whether the stroke of the rod 15B relative to the tube 15A of the boom cylinder 15 coincides with the stroke when the boom 12 is in the traveling posture. Is to detect. Here, as shown in FIGS. 3 and 4, the stroke detection means 18 includes a switch 18A disposed on the distal end side of the tube 15A, one end side attached to the distal end portion of the rod 15B, and the other end side directed toward the tube 15A. The bracket 18B extends and a small detection piece 18C provided at the other end of the bracket 18B and detected by the switch 18A.

  When the boom 12 is in the working posture, the stroke detection means 18 is opened (OFF) with the switch 18A being separated from the detection piece 18C as shown in FIG. 3, for example, and when the boom 12 is moved to the traveling posture, As shown in FIG. 4, the switch 18A detects the detection piece 18C and closes (ON).

  The stroke detecting means 18 opens and closes when the switch 18A detects the detection piece 18C. As the switch 18A, for example, a magnetic sensor that magnetically detects that the detection piece 18C is approaching. An optical sensor that has a light emitting element and a light receiving element and detects that the detection piece 18C is approaching, and a non-contact type proximity switch such as an electromagnetic pickup that generates an electromotive force when the detection piece 18C approaches can be applied. . Further, as the switch 18A, a contact-type switch such as a micro switch that operates when the detection piece 18C comes into contact may be used. The same applies to switches 19A and 20A of stroke detecting means 19 and 20 described later.

  Reference numeral 19 denotes a stroke detection means provided in the arm cylinder 16. The stroke detection means 19 determines whether or not the stroke of the rod 16B with respect to the tube 16A of the arm cylinder 16 coincides with the stroke when the arm 13 is in the traveling posture. Is to detect. Here, the stroke detection means 19 includes a switch 19A disposed on the distal end side of the tube 16A, a bracket 19B having one end attached to the distal end of the rod 16B and the other end extending toward the tube 16A, and the bracket 19B. It consists of a small detection piece 19C provided at the other end and detected by a switch 19A.

  When the arm 13 is in the working position, the stroke detection means 19 is opened when the switch 19A is separated from the detection piece 19C as shown in FIG. 3, for example, and when the arm 13 is moved to the traveling position, as shown in FIG. As shown, the switch 19A is configured to detect and close the detection piece 19C.

  20 is a stroke detection means provided in the bucket cylinder 17, and the stroke detection means 20 determines whether or not the stroke of the rod 17 </ b> B with respect to the tube 17 </ b> A of the bucket cylinder 17 coincides with the stroke when the bucket 14 is in the traveling posture. Is to detect. Here, the stroke detection means 20 includes a switch 20A disposed on the distal end side of the tube 17A, a bracket 20B having one end attached to the distal end portion of the rod 17B and the other end extending toward the tube 17A, and the bracket 20B. It consists of a small detection piece 20C provided at the other end and detected by the switch 20A.

  When the bucket 14 is in the working posture, the stroke detection means 20 opens the switch 20A away from the detection piece 20C, and when the bucket 14 moves to the running posture, the switch 20A detects the detection piece 20C. Closed configuration.

  Therefore, when the working device 11 assumes the traveling posture shown in FIG. 2, as shown in FIG. 4, the switches 18A, 19A, and 20A of the three stroke detecting means 18, 19, and 20 are all detected pieces 18C and 19C. , 20C is closed, and the display device 31, 32, 33, which will be described later, is configured to notify the operator that the working device 11 has moved from the working posture to the traveling posture.

  Reference numeral 21 denotes a cab disposed on the left side of the front portion of the revolving frame 8, and the cab 21 defines a cab. Here, as shown in FIG. 5, a driver's seat 22 on which an operator is seated is provided in the center of the cab 21. A steering column 23 is erected on the front side of the driver's seat 22, and a steering wheel 24 that is steered by an operator when the wheeled hydraulic excavator 1 travels is disposed on the upper end side of the steering column 23.

  Reference numeral 25 denotes a forward / reverse neutral changeover switch (FNR switch) which is located below the steering wheel 24 and is provided on the right side surface of the steering column 23. The forward / reverse neutral changeover switch 25 is, for example, a forward position, a neutral position, It can be switched to the reverse position. The wheel-type hydraulic excavator 1 travels forward when the forward / reverse neutral switch 25 is set to the forward position, and the wheel-type hydraulic excavator 1 travels backward when it is set to the reverse position. Further, when the forward / reverse neutral switch 25 is set to the neutral position, the wheeled hydraulic excavator 1 is configured to stop traveling and perform excavation work using the work device 11.

  Here, the forward / reverse neutral changeover switch 25 is used as one aspect of the traveling posture switch according to the present invention, and detects that the working device 11 is brought into the traveling posture when switched to the forward position or the reverse position. Is.

  Reference numeral 26 denotes a brake pedal arranged on the right side of the steering column 23, and 27 denotes an accelerator pedal arranged side by side on the right side of the brake pedal 26. Then, the operator seated in the driver's seat 22 drives the wheeled hydraulic excavator 1 by depressing the accelerator pedal 27, and applies braking force to the wheeled hydraulic excavator 1 by depressing the brake pedal 26. Yes.

  28 and 29 are left and right console devices provided on both the left and right sides of the driver's seat 22. These left and right console devices 28 and 29 have operation levers 28A and 29A as operation means, respectively. It is provided so that it can tilt. The operator seated in the driver's seat 22 controls the operation of the arm 13 and the bucket 14 by expanding and contracting the arm cylinder 16 and the bucket cylinder 17 of the work device 11 by, for example, tilting the operation lever 28A. By tilting the lever 29A, the turning operation of the upper swing body 7 is controlled, and the boom cylinder 15 of the work device 11 is extended and contracted to control the operation of the boom 12.

  Reference numeral 30 denotes a control panel located on the front side of the right console device 29 and disposed on the right front side of the cab 21. The control panel 30 is provided with various kinds of instruments and each display 31 described later. , 32, 33, and a running posture monitor switch 35 are provided.

  31, 32, and 33 are three indicators provided adjacent to each other on the control panel 30, 31 indicates a boom indicator, 32 indicates an arm indicator, and 33 indicates a bucket indicator. ing. Each of these indicators 31, 32, and 33 is formed using, for example, green, yellow, and blue light-emitting diodes, and the working device 11 is shown in FIG. 2 for an operator seated in the driver's seat 22 in the cab 21. Informing means for informing that the vehicle is in the running posture is configured. In addition, each indicator 31, 32, 33 is not restricted to a light emitting diode, For example, you may form with the normal bean lamp which consists of single light.

  Here, as shown in FIG. 6, the boom indicator 31 is configured such that the battery 34 is turned on when the switch 18A of the stroke detecting means 18 is closed in a state in which a travel attitude monitor switch 35 described later is turned on (closed). Turns on when power is supplied from. The arm indicator 32 is lit when the switch 19A of the stroke detecting means 19 is closed with the traveling posture monitor switch 35 turned on. Further, the bucket display 33 is lit when the switch 20A of the stroke detecting means 20 is closed with the travel attitude monitor switch 35 being turned on.

  In this case, since the switches 18A, 19A, and 20A are connected in parallel to each other, the boom indicator 31 is lit when the switch 18A is closed regardless of whether the switches 19A and 20A are open or closed. The arm indicator 32 is turned on when the switch 19A is closed regardless of whether the switches 18A and 20A are open or closed, and the bucket indicator 33 is closed regardless of whether the switches 18A and 19A are open or closed. It is configured to light up when

  35 is a traveling posture monitor switch provided on the control panel 30 together with the respective indicators 31, 32, 33. The traveling posture monitor switch 35 is provided in the cab 21 when the working device 11 is changed from the working posture to the traveling posture. It is input (closed) by the operator. In this case, as shown in FIG. 6, the traveling posture monitor switch 35 is disposed between the switches 18 </ b> A, 19 </ b> A, 20 </ b> A connected in parallel and the battery 34.

  The travel attitude monitor switch 35 is used as an aspect of the travel attitude switch according to the present invention. The travel attitude monitor switch 35 may be used as a dedicated travel attitude switch, and as described above, the forward / backward / neutral switching is performed. The switch 25 may be used as a travel posture switch.

  When excavation work is performed using the work device 11, the traveling posture monitor switch 35 is not turned on but is kept open (OFF). In this state, even if the switch 18A of the stroke detection means 18 detects and closes the detection piece 18C of the bracket 18B, the boom indicator 31 remains off, and similarly, the arm indicator 32 and the bucket display 33 are also kept off.

  On the other hand, when, for example, the wheel-type hydraulic excavator 1 travels on a public road or the like, when the work device 11 is moved from the work posture to the travel posture, the operator turns on the travel posture monitor switch 35 to close it ( ON). For this reason, when the switch 12A of the stroke detecting means 18 detects the detection piece 18C and is closed by the movement of the boom 12 to the traveling posture, the boom indicator 31 is lit and the arm 13 is moved to the traveling posture. By moving, when the switch 19A of the stroke detection means 19 detects the detection piece 19C and is closed, the arm indicator 32 is turned on, and the bucket 14 moves to the running posture, so that the stroke detection means 20 When the switch 20A detects the detection piece 20C of the bracket 20B, the bucket indicator 33 is turned on.

  Thus, in order to move the working device 11 to the running posture, an operator who sits on the driver's seat 22 in the cab 21 and operates the operation levers 28A and 29A, for example, gets down the cab 21 and each cylinder of the working device 11 It is possible to determine whether or not the boom 12 has moved to the running posture by lighting the boom indicator 31 without observing the strokes 15, 16, and 17, and the arm 13 is turned on by lighting the arm indicator 32. It is possible to determine whether or not the bucket 14 has been moved to the traveling posture, and it is possible to determine whether or not the bucket 14 has been moved to the traveling posture by turning on the bucket display 33.

  The wheel-type hydraulic excavator 1 according to the present embodiment has the above-described configuration. The wheel-type hydraulic excavator 1 is self-propelled to the work site by the wheel-type traveling body 2 and then uses the work device 11 to remove earth and sand. Perform excavation work.

  Here, when excavation work is performed using the work device 11, the operator in the cab 21 holds the traveling posture monitor switch 35 provided on the control panel 30 in an opened state without turning it on. . In this state, the operator seated in the driver's seat 22 extends and contracts the boom cylinder 15, arm cylinder 16, and bucket cylinder 17 by tilting the left and right operation levers 28 </ b> A and 29 </ b> A. As a result, the boom 12, the arm 13, and the bucket 14 are moved up and down, and the sand and the like can be excavated by the bucket 14.

  At the time of excavation work by the working device 11, since the travel posture monitor switch 35 is opened, for example, while the boom cylinder 15 expands and contracts from the expansion side stroke end to the reduction side stroke end, the stroke detection means 18 Even if the switch 18A temporarily detects the detection piece 18C of the bracket 18B, the boom display device 31 remains off without being turned on. Similarly, the arm display 32 and the bucket display 33 are also kept off.

  In this way, even if any of the boom 12, the arm 13 and the bucket 14 is temporarily in the traveling posture during excavation work, the indicators 31, 32 and 33 are unexpectedly lit. Therefore, the operator can tilt the operating levers 28A and 29A and move the working device 11 up and down without worrying about the indicators 31, 32 and 33 arranged on the control panel 30. Excavation work such as earth and sand can be performed smoothly.

  Next, when the wheeled excavator 1 travels on a public road, for example, to move to a different work site, the work device 11 that is in the work posture is first moved to the travel posture shown in FIGS. 2 and 4. Must be moved.

  In this case, the operator in the cab 21 first turns on the travel posture monitor switch 35 provided on the control panel 30 to close it. In this state, the operator seated in the driver's seat 22 moves the boom 12 toward the traveling posture by, for example, tilting the right operation lever 29A and adjusting the stroke of the boom cylinder 15 appropriately.

  Here, when the boom 12 reaches the traveling posture shown in FIGS. 2 and 4, the switch 18A of the stroke detection means 18 provided in the boom cylinder 15 detects and closes the detection piece 18C of the bracket 18B. As a result, the boom indicator 31 provided on the control panel 30 is turned on to notify the operator that the boom 12 has moved to the traveling posture.

  Accordingly, the operator can confirm that the boom 12 has reached the traveling posture without having to go down from the cab 21 and visually confirm the stroke of the boom cylinder 15 by turning on the boom indicator 31. Then, the operation for adjusting the stroke of the boom cylinder 15 is finished.

  After the boom indicator 31 is lit, the operator moves the arm 13 toward the traveling posture by, for example, tilting the left operation lever 28A and adjusting the stroke of the arm cylinder 16 appropriately. Let

  Here, when the arm 13 reaches the traveling posture, the switch 19A of the stroke detection means 19 provided in the arm cylinder 16 detects the detection piece 19C of the bracket 19B and closes it. As a result, the arm indicator 32 provided on the control panel 30 is turned on to notify the operator that the arm 13 has moved to the traveling posture.

  Therefore, the operator can confirm that the arm 13 has reached the traveling posture without lighting the cab 21 and visually confirming the stroke of the arm cylinder 16 by turning on the arm indicator 32, for example. Then, the operation on the arm cylinder 16 is finished.

  After the boom indicator 31 and the arm indicator 32 are turned on, the operator tilts the operation lever 28A on the left, for example, and adjusts the stroke of the bucket cylinder 17 to adjust the bucket 14 accordingly. Move toward the running posture.

  Here, when the bucket 14 reaches the traveling posture, the switch 20A of the stroke detection means 20 provided in the bucket cylinder 17 detects the detection piece 20C of the bracket 20B and closes it. As a result, the bucket display 33 provided on the control panel 30 is turned on to notify the operator that the bucket 14 has moved to the traveling posture.

  Therefore, the operator can confirm that the bucket 14 has reached the traveling posture without lighting the cab 21 and visually confirming the stroke of the bucket cylinder 17 by turning on the bucket indicator 33, for example. Then, the operation on the bucket cylinder 17 is finished.

  In this way, with the boom indicator 31, the arm indicator 32, and the bucket indicator 33 provided on the control panel 30 in the cab 21, the working device 11 is shown in FIGS. Since it becomes a driving | running | working attitude | position, the wheeled hydraulic excavator 1 can drive | work safely on a public road.

  In this case, the operator in the cab 21 confirms whether or not the boom 12, the arm 13, and the bucket 14 of the work device 11 have moved to the running posture one by one by lighting the respective indicators 31, 32, and 33. The strokes of the cylinders 15, 16, and 17 can be adjusted by the operation levers 28A and 29A. Therefore, in order to determine whether or not the boom 12, the arm 13, and the bucket 14 have moved to the traveling posture, the operator often gets out of the cab 21 and visually observes the strokes of the boom cylinder 15, the arm cylinder 16, and the bucket cylinder 17. Unnecessary work. As a result, the operation of moving the work device 11 from the working posture to the traveling posture can be performed efficiently in a short time, and the workability can be improved.

  Moreover, as shown in FIG. 6, the switch 18 </ b> A of the stroke detection means 18 provided in the boom cylinder 15, the switch 19 </ b> A of the stroke detection means 19 provided in the arm cylinder 16, and the stroke detection provided in the bucket cylinder 17. The switch 20A of the means 20 is connected in parallel with each other.

  Therefore, the boom indicator 31 is lit when the switch 18A is closed regardless of whether the switches 19A, 20A are open or closed, and the arm indicator 32 is switched regardless of whether the switches 18A, 20A are open or closed. Lights when 19A is closed, and bucket indicator 33 lights when switch 20A is closed regardless of whether the switches 18A and 19A are open or closed. Therefore, it is not necessary to determine the order for moving the three members of the boom 12, the arm 13, and the bucket 14 to the traveling posture in advance, and the operator moves the boom 12, the arm 13, and the bucket 14 to the traveling posture in an order that facilitates the work. Therefore, the workability when moving the working device 11 to the traveling posture can be further enhanced.

  In the above-described embodiment, the wheel-type hydraulic excavator 1 including the working device 11 including the single boom 12, the arm 13, and the bucket 14 is described as an example. However, the present invention is not limited to this, and can be applied to a wheel-type hydraulic excavator provided with a working device 41 having a two-stage boom as in the first modified example shown in FIG. .

  In this case, the work device 41 includes a first boom 42, a second boom 43, an arm 44, a bucket 45, a boom cylinder 46, a positioning cylinder 47, an arm cylinder 48, a bucket cylinder 49, and the like. Each cylinder 46, 47, 48, 49 is provided with a stroke detecting means (not shown), and the first boom 42, the second boom 43, the arm 44, and the bucket 45 are traveled as shown in FIG. It is good also as a structure which provides the alerting | reporting means of the several indicator lamp which alert | reports this to an operator, when it becomes detected.

  Moreover, in embodiment mentioned above, the indicator 31 for booms and the indicator 32 for arms are used as an alerting | reporting means which alert | reports to an operator that the boom 12, the arm 13, and the bucket 14 which comprise the working apparatus 11 became the driving | running | working posture. The case where three indicators of the bucket indicator 33 are used is illustrated. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. 8, three indicators 31 that individually display that the boom 12, the arm 13, and the bucket 14 are in the traveling posture. , 32, 33, a working device indicator 51 that displays that the working device 11 as a whole is in the running posture may be provided.

  In this case, the work device display 51 is formed by using a light emitting diode of a color different from the other three displays 31, 32, 33, for example, red, and each stroke detecting means 18, shown in FIG. It is lit when all the switches 19A, 19A, 20A are closed. Thereby, even if any of the boom indicator 31, the arm indicator 32, and the bucket indicator 33 is damaged, the working device indicator 51 is turned on, so that the working device 11 is in the traveling posture. This can be notified to the operator.

  In the above-described embodiment, the boom indicator 31, the arm indicator 32, and the bucket indicator 33 are used as notification means for notifying that the boom 12, the arm 13, and the bucket 14 are in the traveling posture. This is an example. However, the present invention is not limited to this. For example, as in the third modified example shown in FIG. 9, a voice notification device 52 that notifies the boom 12, the arm 13, and the bucket 14 in a running posture is used. It is good also as a structure.

  In this case, the switches 18A, 19A, and 20A of the stroke detecting means 18, 19, and 20 and the running posture monitor switch 35 are connected to the voice control device 53, and the voice control device 53 is connected to the switches 18A, 19A, and 20A. The sound alarm 52 is driven based on the detection signal from the running posture monitor switch 35. As a result, the voice notification device 52 can notify the operator that the boom 12, the arm 13, and the bucket 14 have moved to the traveling posture, for example, by a voice such as “now in the traveling posture”.

  Further, in the above-described embodiment, the travel posture monitor switch 35 that is turned on when the working device 11 is brought into the travel posture is provided, and in the state where the travel posture monitor switch 35 is turned on, the stroke detection means 18, 19 are provided. , 20 when the switches 18A, 19A, 20A are closed, the respective indicators 31, 32, 33 are lit. However, the present invention is not limited to this. For example, in the state where the forward / reverse neutral switch 25 provided in the cab 21 is switched to the forward position or the reverse position, the switch 18A of each stroke detection means 18, 19, 20 is used. , 19A, 20A may be configured to turn on the respective indicators 31, 32, 33. In this case, the traveling posture monitor switch 35 can be omitted.

  Furthermore, in embodiment mentioned above, the case where the bucket 14 for excavation work is used as a working tool is illustrated. However, the present invention is not limited to this, and can be widely applied to, for example, a wheel-type construction machine using a fork grapple for dismantling work, a breaker for rock drilling work, or the like as a work tool.

1 is a front view showing a wheeled hydraulic excavator to which an embodiment of the present invention is applied. It is a front view which shows the wheel-type hydraulic excavator with which the working apparatus was in the running posture. It is a front view of the principal part expansion which shows the working apparatus in FIG. It is a front view of the principal part expansion which shows the working apparatus in FIG. It is a top view which shows arrangement | positioning of the driver's seat in a cab, an operation lever, each indicator, a driving posture monitor switch, etc. It is a circuit diagram including a switch of a stroke detection means, each indicator, a running posture monitor switch, and the like. It is a front view which shows the wheel type hydraulic excavator by the 1st modification. It is a circuit diagram containing the switch by a 2nd modification, each indicator, a driving posture monitor switch, etc. It is a circuit diagram containing the switch by the 3rd modification, a voice alerting device, etc.

Explanation of symbols

1 Wheeled hydraulic excavator 2 Wheeled traveling body (lower traveling body)
4 Front wheel 5 Rear wheel 7 Upper swing body 8 Swivel frame 11, 41 Working device 12 Boom 13, 44 Arm 14, 45 Bucket (Working tool)
15 Boom cylinder 16, 48 Arm cylinder 17, 49 Bucket cylinder (work implement cylinder)
18, 19, 20 Stroke detection means 18A, 19A, 20A Switch 21 Cab 25 Forward / reverse neutral switch (traveling attitude switch)
28A, 29A Operation lever (operation means)
30 Control panel 31 Boom indicator (notification means)
32 Arm display (notification means)
33 Bucket indicator (informing means)
35 Travel posture monitor switch (travel posture switch)
42 First Boom 43 Second Boom 46 Boom Cylinder 47 Positioning Cylinder 51 Work Device Indicator (Notification Means)
52 Voice alarm (notification means)

Claims (5)

A self-propelled lower traveling body, an upper revolving body provided on the lower traveling body so as to be able to swivel, and a predetermined traveling posture when the lower traveling body is provided so as to be able to move up and down on the upper revolving body. And a working device
The working device includes a boom whose base end is rotatably attached to the upper swing body and is operated by a boom cylinder, an arm which is rotatably attached to the distal end side of the boom and is operated by an arm cylinder, In a construction machine constituted by a work tool that is rotatably attached to the tip side and is operated by a work tool cylinder,
Stroke detection means for detecting the strokes of the boom cylinder, arm cylinder, and work implement cylinder, respectively, and to notify the operator that the work device is in the traveling posture based on the strokes of the cylinders detected by the stroke detection means. A construction machine characterized by comprising a notification means for notification.   The construction machine according to claim 1, further comprising a travel posture switch that is turned on when the working device is placed in a travel posture, wherein the notification unit is activated when the travel posture switch is turned on.   2. The upper swing body has a driver seat where an operator is seated when operating each cylinder by operating means, and the notification means is provided at a position where the operator seated in the driver seat can be notified. Or the construction machine of 2.   The notifying means includes a boom indicator that is turned on when the stroke detecting means provided on the boom cylinder detects that the boom is in a traveling posture, and the stroke detecting means provided on the arm cylinder. Illuminates when it is detected that the working tool is in the running posture by the arm indicator that is turned on when it is detected that the arm is in the running posture, and the stroke detecting means provided in the working tool cylinder. The construction machine according to claim 1, 2, or 3, comprising a work tool display. A self-propelled wheel-type traveling body having left and right front wheels and left and right rear wheels, a revolving body provided on the wheel-type traveling body so as to be capable of turning, and a driver's cab provided on the revolving body. A cab that is defined, and a working device that is provided so as to be able to move up and down on the revolving frame and that has a predetermined traveling posture when the lower traveling body travels,
The working device includes a boom whose base end side is rotatably attached to the revolving frame and operated by a boom cylinder, an arm which is rotatably attached to the distal end side of the boom and is operated by an arm cylinder, and a distal end of the arm In a construction machine constituted by a work tool that is rotatably attached to the side and is operated by a work tool cylinder,
Stroke detecting means for detecting the strokes of the boom cylinder, the arm cylinder, and the work tool cylinder, respectively;
In the cab, notification means for notifying that the boom, the arm, and the work implement are in the running posture based on the stroke of each cylinder detected by each stroke detection means is provided. Construction machine characterized by.

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