JP2001200553A - Operating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control operating machine easily confirming a swinging position of a multi-articulated front in spite of the position of an operator, increasing work efficiency and having a device capable of lightening the burden imposed on the operator. SOLUTION: A frame 3 is provided on a traveling body 1, and a power unit 7 and a Bessel 4 capable of being dumped backward or sideways are mounted on the frame 3. The multi-articulated front 6 is provided on the frame 3 through a swing device 5, and a working device such as bucket 23 or the like is mounted to the multi-articulated front 6. The working machine includes an indication device such as indicating lamp 150 informing the operator of the swinging position of the multi-articulated front 6, sound generator, vibration generator or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine which performs operations such as excavation, demolition, and crushing, and has a function of storing and transporting excavated and dismantled materials, equipment and materials, and the like.

[0002]

2. Description of the Related Art When performing plumbing work or repair work on a road or the like, a hydraulic excavator for excavation, loading and transporting of excavated soil and backfill soil, and transport of construction materials such as sewer pipes. You need a dump truck to do it.

[0003] Further, when performing construction on a narrow road where a dump truck cannot enter, excavated soil, construction materials, and the like are temporarily collected in a predetermined place, and an operator uses a cat wheel or the like to perform the above-described operation. Carry out transportation work.

On the other hand, Japanese Unexamined Patent Publication No. Hei 10-8498 discloses a transport vehicle equipped with an excavator. The transport vehicle has a frame mounted on a traveling body, and a power unit, a rear or side on the frame. A multi-joint front is mounted on the front side of the frame via a turning device, and a work implement is attached to the multi-joint front. This work machine can load the earth and sand excavated by the multi-joint front, load it in the vessel by turning the multi-joint front backward, accumulate and transport,
One unit can serve as both an excavator and a carrier.

[0005]

In the working machine described in the above publication, the position of the stand of the operator having the portable transmitter is restricted due to the fact that the site is crowded, etc.
It may be difficult to confirm the turning position of the multi-joint front, for example, it may be difficult to confirm whether the bucket is located on the vessel. For example, when an operator having a transmitter for remote control has to perform remote control beside or in front of a relatively remote work machine, it is difficult to confirm the position of the bucket,
In some cases, it is difficult to determine whether the earth and sand should be dropped by rotating the bucket. Also, when operating behind the work machine, if the multi-joint front is at the lowered position, the vessel may interfere and the position of the multi-joint front may not be visually confirmed. As described above, when it is difficult to visually confirm the turning position of the multi-joint front, there is a problem that the work efficiency is reduced due to the position confirmation and the operator is tired.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a means for easily confirming the turning position of the multi-joint front regardless of the position of the operator, thereby increasing work efficiency and reducing the burden on the operator. To provide a working machine.

[0007]

According to a first aspect of the present invention, there is provided a working machine having a frame mounted on a traveling body, a power unit and a vessel which can be dumped rearward or laterally mounted on the frame. A multi-joint front mounted on a frame via a turning device, a work implement attached to the multi-joint front, and remotely controlled by a radio signal from a transmitter carried by an operator, wherein the multi-joint front is A display means for notifying an operator of a turning position of the front is provided.

As described above, by providing the display means for notifying the turning device of the multi-joint front, the operator can
For example, whether the bucket is on the vessel or at the excavation position can be known, and the next response can be quickly performed.

In the present invention, the display means includes:
An indicator light (claim 2) for indicating that the turning position of the articulated front is within a predetermined range, a sound generator (claim 3),
A vibration generator (claim 5) provided in a transmitter carried by the operator is used. In the case where an indicator light or a sound generator is used, the provision of the transmitter (Claim 4) makes it easy to confirm the turning position of the multi-joint front regardless of the position of the operator, and the turning operation of the multi-joint front. There is an advantage that it does not get in the way.

In the present invention, as the display means, a position display member which is attached to the revolving body of the revolving device so as to protrude upward to a position higher than the vessel and displays the revolving position of the multi-joint front. Item 6), a position display member protruding upward from the upper surface of the multi-joint front boom (Claim 7), a position display member protruding upward from the upper surface of the front end of the vessel (Claim 8), etc. Is used.

[0011]

FIG. 1 is a side view showing an embodiment of a working machine according to the present invention with a vessel lifted,
2 and 3 are a plan view and a front view (however, illustration of a multi-joint front is omitted) of the working machine.

1 to 3, reference numeral 1 denotes a traveling body. In this embodiment, a crawler 1b type is shown, but a wheel type traveling body is also used. Reference numeral 2 denotes a turning device installed on the traveling body frame 1a. As shown in FIG. 2, the turning device 2 comprises a turning hydraulic motor 2a and a center joint 2
b. Reference numeral 3 denotes a turning frame provided on the turning object side of the turning device 2. In some cases, a non-swirl frame may be installed instead of the swivel frame 3.

A dumpable vessel 4 is mounted on a rear portion of the turning frame 3 and a multi-joint front 6 is attached to a front end of the turning frame 3 via a turning device 5. A power unit 7 is mounted between them.

As shown in FIG. 1, the vessel 4 is mounted on the revolving frame 3 via a lift device 8 and a dump device 9. The lift device 8 includes an X-shaped support frame 12 interposed between an underframe 11 fixed on the swing frame 3 and the lift frame 10, and a lift hydraulic pressure interposed between the swing frame 3 and the lift frame 10. And a cylinder 13. The X-shaped support frame 12 is provided on the left and right sides of the vessel 4, and one end of each of the two frames 14 and 15 is connected to the underframe 11 and the vessel 4 respectively.
And rollers 18 and 19 for rolling back and forth along the vessel 4 and the underframe 11, respectively, are attached to the other end. The dump device 9 includes two hydraulic cylinders 20 for dumping interposed between the lift frame 10 and the bottom of the vessel 4.

In this embodiment, the vessel 4 is configured to be dumped rearward, but a configuration in which the vessel 4 is dumped sideways may be employed. Further, the lift device 8 may be omitted, and the vessel 4 may be mounted on the turning frame 3 via the dump device 9.

The multi-joint front 6 is installed at the center of the front end of the revolving frame 3. In the present embodiment, the commonly used boom 21, arm 22, backhoe bucket 23, and An example including a boom cylinder 25 to be rotated, an arm cylinder 26, and a bucket cylinder 27 is shown.

This work machine performs remote control by radio, and FIG. 4 is a control block diagram of the work machine that performs remote control by radio. In FIG. 4, reference numeral 30 denotes a portable transmitter remotely controlled by an operator, and 31 denotes a receiver mounted on the turning frame 3 so as to receive a specific power wireless signal from the transmitter 30. The reception signal received by 31 is sent to a valve driver 32 (the valve driver 32 is composed of a microcomputer and a driver circuit controlled by its output) by digital communication. The actuator 35 is controlled by operating the electromagnetic proportional pressure reducing valve 37 and the electromagnetic on / off valve 38 which are pilot valves of the control valve 36 of each actuator 35 by the valve driver 32.

The actuator 35 includes the lift hydraulic cylinder 13, the dump hydraulic cylinder 20, the turning motor 5a of the turning device 5 of the articulated front 6, the boom cylinder 25, the arm cylinder 26, the bucket cylinder 27, the turning device 2, The traveling motor of the body 1.

As shown in FIG. 1 to FIG.
The power unit 7, the receiver 31, the electromagnetic proportional pressure reducing valve 37, the electromagnetic on / off valve 38, and the control valve 36 are installed at the front of the device. Further, tanks 40 such as an oil tank and a fuel tank are mounted. The power unit 7 includes an engine / hydraulic pump 41, a radiator / oil cooler 42, and the tanks 40, and is covered by a cover 7a. The power unit 7 has a structure in which one end of the vessel is extended and the cover 4a of the power unit 7 is covered and protected by the extension 4a.

With the construction described above, in the working machine of the present embodiment, the earth and sand, waste materials, etc. generated by excavation, demolition, crushing, etc. are loaded into the vessel 4 by turning the multi-joint front, and then the traveling body 1 is operated. By moving the working machine, the working machine can be moved and transported to a predetermined collecting place or the like. Further, by mounting materials such as blocks and sewer pipes and equipment used for work on the vessel 4, and traveling to the site, it can be used as a transport vehicle.

FIG. 5 shows an example of a device for detecting a turning position for displaying the turning position of the turning device 5 according to the present invention. FIG. 5A shows a state in which the articulated front 6 has been turned to some extent from the forward-facing state by the turning device 5.
(B) shows a state where the articulated front 6 is directed forward. FIG.
In (A), reference numeral 120 denotes a center of rotation of the swing device 5, and strikers 110 and 111 that swing together with the swing body are mounted on the swing body of the swing device 5, and these strikers 110 and 111 are attached to the swing body frame 3. As a result, the limit switch 100 for detecting the turning device by operating the lever 100a is attached. In FIG. 5B, the operation range of the limit switch 100 by the striker 110 indicates the excavation range θ1, and the operation range of the limit switch 100 by the striker 111 is that the multi-joint front 6 turns backward and the earth and sand falls into the vessel 4. This indicates that the bucket 23 exists in the range θ2 in which the bucket 23 can be moved.

As shown in FIGS. 1, 2 and 6 (A), an indicator light 150 which is turned on when the limit switch 100 is operated is provided on the cover 7a of the power unit 7. The indicator light 150 is higher than the height of the vessel 4 and is attached so that it can be seen from behind.

As described above, when the articulated front 6 is within a predetermined excavation range, or when the bucket 23 is
Is detected by the limit switch 100,
If the display is made by the indicator lamp 150, the position of the multi-joint front 6 can be easily known and the digging / loading operation can be performed even when the operator is at a lateral position or a relatively distant position and remotely operated.

FIG. 6B shows an example in which an indicator light 151 corresponding to the indicator light 150 is attached to a transmitter 30 for remote operation. In this case, a signal indicating whether or not the articulated front 6 is within the turning ranges θ1 and θ2 is output to the transmitter 30 by a wireless output device in the work machine (not shown).
The indicator lamp 151 is turned on or off by the receiving circuit provided in the above. In this manner, if the indicator light 151 is provided in the transmitter 30, the indicator light 151 is at hand, and therefore, the presence or absence of the lighting of the indicator light 151 can be easily confirmed visually. In addition, there is no difficulty in installation when the indicator lamp 150 is mounted on the revolving unit frame 3 and no risk of damage due to work.

As a means for detecting the turning range of the articulated front 6, a proximity sensor, a photoelectric sensor or the like can be used instead of the limit switch 100. As a display means, as shown in FIG.
52 can be used. The sound generator 152 uses a signal transmitted from the same working machine as described above to control the turning range θ.
At 1, θ2, a sound is generated by a word, a melody or a buzzer. The sound generator 152 may be installed on the revolving frame 3. However, by providing the sound generator 152 on the transmitter 30, it is easier to confirm the position of the articulated front 6.

As a display means, a vibration generator 153 may be used for the transmitter 30 as shown in FIG. The vibration generator 153 generates vibration when the articulated front 6 reaches the turning ranges θ1 and θ2 to notify an operator.

As means for detecting the turning range, as shown in FIG. 8, a turning angle detector 5c is provided in a turning motor 5b of the turning device 5, and the turning position of the turning body 54a is detected from an output signal thereof. Is also good. Also in this case, the output signal of the rotation angle detector 5 is directly or processed and output to the transmitter 30 by a wireless output device in a work machine (not shown). In the transmitter 30, the indicator light 151, the sound generator 152, or The swing range is notified to the operator by the vibration generator 153.

As described above, when displaying the revolving position of the revolving unit of the revolving device 5, the setting of the revolving range is not limited to the above example and can be changed to various modes depending on the configuration and use of the working machine. It is.

FIG. 9 shows another embodiment of the present invention, in which a bar-shaped position display member 160 is projected from the upper surface of the vessel 4 on the revolving unit 5a of the revolving device 5 on the opposite side to the falling side of the boom 21. As shown in FIG.

If such a position display member 160 is provided, the operator 50 is located at the rear and the multi-joint front
Even if the boom 21 is in a prone position and the articulated front 6 is difficult to see, it is possible to know the turning position of the articulated front 6 from the position of the position display member 160. As shown in FIG. 10, the position indicating member 161 may be provided so as to protrude above the upper surface of the boom 21 of the articulated front 6, and even if the operator 50 is located behind the work machine, You can know the turning position of.

As shown in FIGS. 10 and 11,
The center (shown by a solid line in FIG. 11) or / and both ends (shown by a two-dot chain line in FIG. 11) of the upper surface of the front end of the vessel 4
If the operator 50 is located rearward, a position display member 162 protruding upward is provided.
The turning position of the articulated front 6 can be easily grasped by looking at the articulated front 6 with reference to 2.

In FIGS. 9 to 11, the use of rubber materials as the position indicating members 160 to 162 makes it possible to avoid damage due to collision of work tools and rocks.

In practicing the present invention, an articulated front including a telescopic arm and an articulated arm may be used. Further, the working machine of the above embodiment is
In the development of residential land, one unit can perform three functions of a hydraulic shovel, a loading machine (wheel loader), and a crawler carrier (carrier). ), And one unit can fulfill four roles.

Further, in addition to the backhoe bucket 23 at the end of the multi-joint front 6, a working tool for holding a retaining pile, a working tool for crushing concrete, a working tool for compaction, etc. are prepared so that they can be replaced or added. In the construction of water and sewage,
Carrying materials and equipment, crushing concrete or asphalt after cutting, loading dumps, excavating, installing earth retaining equipment, compacting, backfilling can be done with one unit.

Also, a nail-type or pinch-type dismantling work tool used for dismantling a wooden house,
If a work tool for crushing reinforced concrete is installed, one function of a dismantling machine or a crusher and a carrier can be fulfilled by one unit. In addition, since dismantled or crushed materials can be accommodated in the vessel 4 and work can be performed while clearing, the working environment is improved and safety is improved.

If the backhoe bucket 23 or the like is used for the multi-joint front 6, the work machine can be used as an excavator and a transporter for small trees in the horticultural industry. In addition, as a measure against earthquakes, when excavating, carrying out, excavating to the foundation, and carrying out excavated earth and sand for pier reinforcement to reinforce the pier, apply a work machine to each pier, and use one or two dump trucks as a whole. By preparing and working,
Work can be performed efficiently.

As the working tool attached to the multi-joint front 6, besides the above, a loader bucket, a breaker, a clamshell, a hawk, or an agricultural or horticultural working tool can be used.

[0038]

According to the first to third aspects of the present invention, the display means for indicating the turning device of the multi-joint front is provided, so that the operator can be at a position away from the work machine.
Whether or not a work implement such as a bucket is on the vessel can be easily known, and the next response can be quickly performed, work efficiency is increased, and the burden on the operator is reduced.

If the transmitter carried by the operator is provided with display means, the operator can easily confirm the turning position regardless of the stand position of the operator. There is an advantage that there is no hindrance to the turning operation of the front and the like, and there is no possibility of damage due to the operation of the work machine.

According to a sixth aspect of the present invention, the position display member for displaying the turning position of the multi-joint front is provided on the revolving unit, the upper surface of the boom, or on the vessel, so that the operator is located behind the work machine. In this case, the position of the multi-joint front can be confirmed, thereby improving the working efficiency and reducing the burden on the operator.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a working machine according to the present invention with a vessel lifted.

FIG. 2 is a plan view showing the work machine of FIG. 1 with a multi-joint front omitted.

FIG. 3 is a front view showing the work machine of FIG. 1 with a multi-joint front omitted.

FIG. 4 is a control block diagram of the work machine of FIG. 1;

FIGS. 5A and 5B are plan views each showing an example of a turning position detecting device of the articulated front turning device according to the present embodiment with different turning positions.

FIG. 6A is a side view showing an example of a turning position display device of the articulated front turning device according to the embodiment;
(B) is a front view of a transmitter showing another example of the display device.

7 (A) and 7 (B) are front views of a transmitter showing another embodiment of the turning device display device according to the present invention.

FIG. 8 is a side view showing another embodiment of the turning position detecting device of the multi-joint front turning device according to the present invention.

FIG. 9 is a side view showing another embodiment of the position indicating member of the multi-joint front turning device according to the present invention.

FIG. 10 is a side view showing another embodiment of the position indicating member of the multi-joint front turning device according to the present invention.

FIG. 11 is a rear view showing a position indicating member of the multi-joint front turning device of FIG. 10;

[Explanation of symbols]

1: running body, 2: swing device, 3: swing frame, 4: vessel, 5: swing device, 5a: swing body, 5b: swing motor, 5c: rotation angle detector, 6: articulated front, 7:
Power unit, 8: lift device, 9: dump device, 1
3: Hydraulic cylinder for lift, 20: Hydraulic cylinder for dump, 21: Boom, 23: Backhoe bucket, 25:
Boom cylinder, 26: arm cylinder, 27: bucket cylinder, 30: transmitter, 31: receiver, 32: valve driver, 35: actuator, 36: control valve, 37: electromagnetic proportional pressure reducing valve, 38: electromagnetic on / off valve, 40: tanks, 41: engine / hydraulic pump,
42: radiator oil cooler, 50: operator,
100: limit switch, 110, 111: striker, 150, 151: indicator light, 152: sound generator, 15
3: Vibration generator, 160 to 162: Position display member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Hoshino, Inventor Yoshihiro Hoshino, Tsuchiura-shi, Ibaraki Prefecture 650, Tsuchiura Plant, Hitachi Construction Machinery Co., Ltd. Issue Date F-term in Ritsukiki Co., Ltd. (Reference) 2D003 AA01 AA06 AB01 AB02 AB03 AB04 AB07 BA04 BA06 BB04 CA02 DA03 DA04 2D015 HA03 HB04

Claims (8)

[Claims] 1. A frame is mounted on a traveling body, on which a power unit and a vessel that can be dumped rearward or laterally are mounted, and a multi-joint front is mounted on the frame via a turning device. And a work implement mounted on the articulated front, remotely controlled by a radio signal from a transmitter carried by the operator, comprising a display means for notifying the operator of the turning position of the articulated front. A working machine characterized in that: 2. The work machine according to claim 1, wherein said display means comprises an indicator light for indicating that the turning position of the multi-joint front is within a predetermined range. 3. The working machine according to claim 1, wherein said display means comprises a sound generator for displaying that the turning position of the multi-joint front is within a predetermined range. 4. The work machine according to claim 1, wherein the display unit is provided in the transmitter. 5. The work machine according to claim 1, wherein the display means comprises a vibration generator provided in the transmitter and displaying that the turning position of the multi-joint front is within a predetermined range. 6. The display device according to claim 1, wherein the display means is attached to the revolving unit of the revolving device so as to protrude upward to a position higher than the vessel, and comprises a position display member for displaying the revolving position of the multi-joint front. A working machine characterized by that: 7. The working machine according to claim 1, wherein said display means comprises a position display member protruding above the upper surface of the boom of the multi-joint front. 8. A working machine according to claim 1, wherein said display means comprises a position display member projecting upward from an upper surface of a front end of said vessel.