JP2001303613A - Connector and method of controlling connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely conduct the mounting and demounting works of a working machine in a slewing service car in which a connector with a hydraulic cylinder is disposed at an arm front end. SOLUTION: An operating device 41 controlling the hydraulic cylinder 34 for the connector 11 is composed of a switch 43 with a lamp, a lamp 44 and a rotary switch 45. The lamp and a buzzer 51 are operated by the operation of the switch 43 with the lamp. A cutoff valve 82, a traveling two-speed solenoid valve 81 and a solenoid valve 52 controlling the hydraulic cylinder 34 for the connector 11 are juxtaposed onto hydraulic pumps 57, 57b, 57c, 57d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connecting device for attaching a working machine to a tip of an arm of a turning work vehicle.

[0002]

2. Description of the Related Art Conventionally, an arm such as a backhoe and a working machine.
DESCRIPTION OF RELATED ART The connection apparatus equipped with the construction machine provided with (attachment) is known. The attachment or detachment operation of the working machine to or from the connecting device is performed by one switch.
Japanese Utility Model Laid-Open Publication No. 3-93847 discloses a mechanism in which a switch is provided at the upper end of an operation lever to control a hydraulic cylinder.

[0003]

When a single switch is used to attach or detach a working machine to or from a connecting device, the operator may be given a feeling of psychological anxiety.
Further, since control by a switch, which is disclosed in Japanese Utility Model Laid-Open No. 3-93847, is also performed by a single switch, the operator may be given a feeling of psychological anxiety, and a configuration that allows the operator to recognize the certainty of the work is necessary. It is said.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. As set forth in claim 1, in the control method of the connecting device with the hydraulic cylinder, which is disposed at the tip of the arm of the turning work vehicle and connects the working machine, the mounting / removing operation is performed by an operation display switch and a mounting / removing operation switch. The operation is performed.

According to a second aspect of the present invention, a switch with a lamp is used as the operation display switch, and by operating the switch, a display device that affects vision and hearing is operated.

According to a third aspect of the present invention, an automatic return switch is used as a detachable operation switch, a circuit for storing an operation state of the switch is connected, and operation of the switch is stored when power supply is cut off. Reset.

According to a fourth aspect of the present invention, in a method for controlling a connecting device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, a protective cover of a control device for controlling the connecting device is provided. The "open" signal activates a visual and audible display which indicates readiness for operation.

According to a fifth aspect of the present invention, in the control method of the connecting device with the hydraulic cylinder, which is disposed at the tip of the arm of the turning work vehicle and connects the working machine, the operation of the main switch of the loading / unloading device is performed after the operation. A work machine is mounted and demounted by a switch provided on the operation lever.

According to a sixth aspect of the present invention, in the coupling device with a hydraulic cylinder disposed at the tip of the arm of the turning work vehicle and connected to the work machine, a solenoid valve for switching a hydraulic circuit to a hydraulic cylinder for mounting and dismounting the work machine. Was added to the cut-off valve and travel speed-up switching valve attached to the hydraulic pump that supplies pressure oil to the work equipment remote control valve.

According to a seventh aspect of the present invention, in the connecting device with a hydraulic cylinder disposed at the end of the arm of the turning work vehicle and connected to the working machine, a hydraulic circuit for the working machine mounting / removing hydraulic cylinder is provided. A branch was made from the upstream side of a cutoff valve attached to a hydraulic pump that supplies pressure oil to the valve.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a turning work vehicle as an embodiment of the work vehicle of the present invention, FIG. 2 is a side view of a connecting device, FIG. 3 is a diagram showing a mounting structure of a work machine, and FIG. FIG. 5, FIG. 5 is a front view, FIG. 6 is a side view, FIG. 7 is a rear view, FIG. 8 is a schematic diagram showing a circuit configuration of an operating device, and FIG. 9 is a schematic diagram showing an arrangement configuration of a hydraulic pump and a solenoid valve. Fig. 10, Fig. 10 is a schematic diagram showing a hydraulic circuit configuration of hydraulic cylinder sliding, Fig. 11 is a diagram showing a time schedule of the operating device, Fig. 12 is a plan view of the operating device according to the second embodiment, and Fig. 13 is a side view of the same. FIG. 14 and FIG. 14 are schematic diagrams showing the circuit configuration, and FIG. 15 is a diagram showing the configuration of the operating device according to the third embodiment.

First, as an embodiment of the work vehicle of the present invention,
The configuration of a turning work vehicle equipped with a crawler traveling device will be described. In FIG. 1, the turning work vehicle has a turning table bearing 7 arranged at the upper center of the crawler traveling device 1, and the turning table bearing 7 supports the revolving unit 8 so as to be able to turn left and right. At one of the front and rear ends of the crawler traveling device 1,
The earth discharging plate 10 is arranged to be vertically rotatable.

Above the revolving unit 8, a hood 9 for covering the engine and a cabinet 21 are provided. The lower end of the boom 6 is pivotally supported by a boom bracket 12 attached to the front end of the revolving unit 8 so as to be rotatable left and right. The base of the arm 5 is pivotally supported at the distal end of the boom 6, and one end of a bucket mounting portion 11 is pivotally supported at the distal end of the arm 5. Bucket mounting part 11
Is equipped with a device such as a bucket 4. The lower end of the boom cylinder 23 is rotatably supported by the boom bracket 12, and the boom 6 is rotated with respect to the boom bracket 12 by expanding and contracting the boom cylinder 23. An arm cylinder 25 is provided on the upper part of the boom 6, and the arm 5 rotates with respect to the boom 6 by the expansion and contraction of the arm cylinder 25. A bucket cylinder 24 is provided at the base of the arm 5, and the coupling device 11 is connected to the tip of the bucket cylinder 24 via a link mechanism. The connecting device 11 is rotatably supported at the distal end of the arm 5, and rotates with respect to the arm 5 by the expansion and contraction of the bucket cylinder 24.

Next, the connecting device 11 will be described with reference to FIG. The coupling device 11 includes a fixed hook 31, a movable hook 32, and a hydraulic cylinder.
The movable hook 32 is rotatably supported on the fixed hook 31 by a pin 33. The hydraulic cylinder 34 is rotatably supported by a fixed hook 31, and the cylinder rod of the hydraulic cylinder 34 is connected to the movable hook 32. Thereby, the hydraulic cylinder 34 is expanded and contracted, and the distance between the tip of the fixed hook 31 and the tip of the movable hook 32 is adjusted. The hydraulic cylinder 34 is provided with hydraulic oil from a hydraulic pump disposed on the revolving structure 8 via a hydraulic hose 35.

In the connecting device 11, the hook shapes of the fixed hook 31 and the movable hook 32 are formed at acute angles. That is, the fixed hook 31 and the movable hook 32
When the angles formed by the inner surfaces of the hook portions are A1 and A2, respectively, both A1 and A2 are configured to be smaller than 90 degrees. By setting the angle formed by the inner surface of the hook portion to an acute angle, a different pin-shaped bucket can be mounted by the connecting device 11. Further, since the angle formed by the inner surface of the hook portion is formed to be an acute angle, the inner surface of the hook portion and the pin come into contact with each other at two points, and a straight line connecting these two points can be made closer to the axis of the pin. Thus, the force for pushing the pin outward from the hook portion can be reduced.

Next, the mounting configuration of the bucket will be described with reference to FIG. First, the angles of the boom 6 and the arm 5 are adjusted, and the connecting device 11 is moved closer to the bucket 4. Then, as shown in FIG. 3A, the fixed hook 31 is hooked on the pin 4b of the bucket 4 on the machine side. In a state where the pin 4b of the bucket 4 is locked by the fixed hook 31, the connecting device 1
Move 1 upward. Thereby, as shown in FIG. 3B, the bucket 4 rotates, and the pin 4c is rotated upward about the pin 4b as the rotation center. At this time, the movable hook 32 is rotated by the hydraulic cylinder 34, and the pin 4c is locked by the movable hook 32.

Next, referring to FIG. 4 to FIG.
The configuration of the operating device that performs the control will be described. The operating device 41 includes a switch box 42 and a switch 4 with a lamp.
3, a rotary switch 45, a lamp 44, and a lid 46. Further, a buzzer and a solenoid (not shown) are connected to the operation device 41. At the top of the switch box 42, a switch 4 with a lamp
3. A rotary switch 45 and a lamp 44 are provided, and a lamp 44 and a switch 43 with a lamp are provided on the left and right of the rotary switch 45.

The switch 43 with lamp is an operation display switch, which is set to an "enter" state when operating the connecting device 11, and is used when mounting or removing a working machine to or from the connecting device 11. First, the switch 43 with the lamp is turned on. Then, when the attachment or detachment of the working machine to or from the connecting device 11 is completed, the switch 43 with lamp is turned off. The rotary switch 45 is operated only when the switch 43 with the lamp is in the “ON” state. By rotating the rotary switch 45 to one side, the hydraulic cylinder of the coupling device 11 contracts or expands, By rotating to the other side, it slides in the opposite direction. The lamp 44 is illuminated when the rotary switch 45 contracts the hydraulic cylinder of the connecting device 11.

At the top of the switch box 42, the lid 4
6 is attached so as to be openable and closable.
Is closed to cover and protect the switch with lamp 43, the rotary switch 45, and the lamp 44. Further, a stay 42b extends in the horizontal direction on the side surface of the switch box 42, and the switch box 42 is fixed by screwing the stay 42b.

The configuration of the rotary switch 45 will be described. As the rotary switch 45, a three-position rotary switch is used. The rotary switch 45 has a neutral position at the center of the three positions, and automatically returns to the neutral position. Rotary switch 4
Reference numeral 5 indicates that the connection is made to each contact by rotating left and right from the neutral position. In the present embodiment, the three positions of the rotary switch 45 correspond to "disengage", "neutral", and "attach". The connection of the connecting device 11 is released by rotating the rotary switch 45 to the “disconnect” position, and the connection of the connecting device 11 is performed by rotating to the “attach” position. . In addition, the rotary switch 45 is "remove".
The lamp 44, which is lit when in the position, is provided on the "remove" side of the rotary switch 45.

The configuration of the switch 43 with lamp will be described. The switch 43 with a lamp has a contact connected thereto only when the switch is pressed, and is automatically reset.
The switch 43 with the lamp "enters" when pressed once.
In this state, the lamp of the switch with lamp 43 is turned on. When the switch 43 with the lamp is pressed again, the switch 43 is turned off.
Lamp 3 is turned off. Further, when the power supply from the battery is cut off by turning off the main switch or the like, the state is automatically turned off.

Next, the electric circuit configuration of the operating device 41 will be described with reference to FIG. The operation device 41 includes a switch 43 with a lamp, a rotary switch 45, a lamp 4
4. The buzzer 51 and the solenoid valve 52 are connected. The operation device 41 further includes a switch recognition circuit 53 with a lamp and a switch state holding circuit 5 with a lamp.
4. A buzzer / lamp output circuit 55 and a solenoid drive circuit 56 are provided. The switch-with-lamp recognition circuit 53 is configured to be able to recognize the "ON" and "OFF" states of the switch 43 with lamp. The lamp-equipped switch state holding circuit 54 keeps the lamp-equipped switch 43 in the “ON” state until the power supply is cut off or the lamp-equipped switch 43 is pressed to the “OFF” state. The buzzer / lamp output circuit 55 includes the lamp 44 and the buzzer 51.
To control the electrical output to the The solenoid drive circuit 56 controls the drive of the solenoid valve 52. The operation device 41 includes a starter switch 4
9, the power of the battery 48 is supplied.

A configuration for supplying hydraulic oil to the hydraulic cylinder 34 of the coupling device 11 will be described with reference to FIGS. The solenoid valve 52 is configured by one of three solenoid valves 83 arranged on the hydraulic pump 57. Hydraulic pumps 57, 57b, 57c, 57d are connected to the engine 58, and discharge hydraulic oil by the driving force of the engine 58. The hydraulic pumps 57, 57 b, 57 c, and 57 d are arranged side by side in the drive shaft direction of the engine 58.
A triple solenoid valve 83 is provided on the gates 57b, 57c and 57d. Triple solenoid valve 83
Is constituted by a solenoid valve 52, a traveling second speed solenoid valve 81, and a remote control cutoff valve. That is, the solenoid valve 52 is configured to be provided in parallel with the traveling second speed solenoid valve 81 and the remote control cutoff valve 82. Coupling device 11
A valve for controlling the supply of pressurized oil to the hydraulic cylinder 34,
By providing the remote control valve for the work equipment and the traveling two-speed solenoid valve together, the valve mechanism can be made compact.

When the hydraulic pump 57 is driven by the engine 58, hydraulic oil is supplied to the solenoid valve 52. Solenoid valve 52 is cutoff valve 8
2 is connected to the hydraulic pump 57 through an oil passage branched from the upstream. The solenoid valve 52 is connected to the hydraulic cylinder 3 of the connecting device 11 via a pilot check valve 59.
4 is connected. By sliding the solenoid valve 52, the supply of hydraulic oil to the hydraulic cylinder 34 is controlled, and the hydraulic cylinder 34 can slide. A check valve 60 is connected between the hydraulic pump 57 and the solenoid valve 52.
Even if the hydraulic piping from 0 to the hydraulic cylinder 34 is damaged, it is possible to prevent the oil from leaking and the hydraulic cylinder 34 to contract, thereby preventing the attachment from being removed.

Next, the operation configuration of the switches in the operation device 41 will be described with reference to FIG. Here, a switch with a red lamp is used as the switch 43 with a lamp, and an orange lamp is used as the switch 44 with a lamp. First, in the normal state (initial state), the switch 43 with the lamp is in the “OFF” state, and the lamp of the switch 43 with the lamp is also in the “OFF” (light-off) state. In addition, the rotary switch 45 is also in the “OFF” state (neutral position), and the lamp 44 is also in the “OFF” state. further,
The buzzer 51 and the solenoid 52 are also in a “cut” state.

Next, as shown in the operation mode 1, by setting the switch 43 with lamp to "ON", the lamp of the switch 43 with lamp is set to "ON" (lighting), and at the same time, the buzzer 51 "ON". State (ringing). Then, as shown in the operation mode 2, the rotary switch 4
5 is set to the "enter" state on the A side (remove side), whereby the lamp 44 is set to the "enter" state (lighting), and the solenoid 52 is "entered" (supplying the hydraulic oil in the direction of contracting the hydraulic cylinder 34). Yes) state. In addition, the lamp of the switch 43 with a lamp and the buzzer 51 are maintained in the "ON" state.

Thereafter, as shown in the operation mode 3, even when the rotary switch 45 is turned off, the lamp 44 is kept on and the solenoid 52 is also kept on. Switch 4 with lamp
The lamp 3 and the buzzer 51 are kept in the "enter" state. Further, as shown in the operation mode 4, when the rotary switch 45 is turned on to the side B (the side to be gripped), the lamp 44 and the solenoid 52 are turned off. In addition, the lamp and the buzzer 51 of the switch 43 with a lamp are maintained in an "ON" state.

Then, as shown in the operation mode 5, by turning the switch 43 with the lamp "on" again, the lamp of the switch 43 with the lamp is turned "off" (extinguished), and at the same time the buzzer 51 is turned "off". State. This returns to the normal state.

That is, when the switch 43 with lamp is pressed, the buzzer 51 and the lamp of the switch 43 with lamp operate. The switch 43 with a lamp is an operation display switch, and the switch 43 with the lamp indicates the completion of the mounting / removing operation preparation. As a means for visually indicating the completion of preparation for mounting / removing operation, a rotating light or a dial can be used other than a lamp, and aurally, a sound other than a buzzer is used. When the rotary switch 45 is turned to the "remove" side, the lamp 44 indicating the "remove" side flashes. Incidentally, the rotary switch 45 automatically returns to the neutral position. By turning the rotary switch 45 to the “disconnect” side, the solenoid valve 52 is turned on, and the hydraulic cylinder 34 linked to the solenoid valve 52 contracts. As a result, the working machine attached to the connecting device 11 comes off. Alternatively, the working machine can be mounted on the connecting device 11.

Then, the boom 6 or the arm 5 is turned, and the work machine is hooked on the connecting device 11. When the rotary switch 45 is turned to the “grab” side, the solenoid valve 52
Becomes OFF, the hydraulic cylinder 34 extends, and the connecting device 1
1 is a state in which the work machine is mounted. Thereafter, when the switch 43 with lamp is pressed, the operation of the buzzer 51 and the lamp of the switch 43 with lamp is stopped. In the operation configuration of the connecting device 11, the lamp 44 and the buzzer 51 are always operated at the time of mounting and detaching operation of the work implement, so that the operating state is recognized by the operator. When the key switch of the engine is turned off,
All operations are returned to the normal (initial) state. When the key switch of the engine is turned off while the rotary switch 45 is set to the "remove" side, the solenoid 52 is turned off, and the state becomes electrically normal (initial state). At this time, the hydraulic pump 57 is driven by the inertial rotation of the engine, the hydraulic cylinder 34 is extended, and the hydraulic cylinder 34 in the initial state is in a state of “grabbing” the working machine.

Next, a second embodiment of the operating device for controlling the connecting device 11 will be described. The operation device 61 includes a switch box 63, an open / close switch 64 provided in the switch box 63, a first release switch 65, a second release switch 66, a mounting switch 68, a lamp 67, and a lid 62. . The lid 62 is rotatably connected to the upper part of the switch box 63,
The open / close switch 64 recognizes the opening / closing of the lid 62. On the upper surface of the switch box 64, a first release switch 65, a second release switch 66, a mounting switch 68, and a lamp 67 are provided. Lamp 6
7 is disposed between the first release switch 65 and the second release switch 66, and the mounting switch 68 is disposed on the near side of the lamp 67. The contacts of the first release switch 65 and the second release switch 66 are connected only when the switches are pressed, and the mounting switch 68 is an automatic return switch that releases the contacts only when the switches are pressed.

Next, the circuit configuration of the operating device 61 will be described with reference to FIG. An open / close switch 64 is provided in the power supply path, and a buzzer 51 and a lamp 67 are provided in series with the insulator open / close switch 64. The buzzer 51 and the lamp 67 are connected in parallel. The open / close switch 64 is connected to a first release switch 65, a second release switch 66, and a mounting switch 68. The first release switch 65 and the second release switch 66 are connected in series, and the first release switch 65, the second release switch 66, and the mounting switch 68 are connected in parallel. The solenoid 52 is connected to the first release switch 65, the second release switch 66, and the mounting switch 68 via a relay 69. By turning on the first release switch 65 and the second release switch 66,
The relay 69 is excited, and the electric circuit of the mounting switch 68 and the solenoid 52 communicates. Then, by pressing the mounting switch 68, the relay 69 is de-energized, the solenoid valve 52 is turned off, and the initial state is returned.

Next, the operation configuration of the operation device 61 will be described. First, by opening the lid 62 of the operating device 61, the open / close switch 64 is turned on, and the buzzer 51 and the lamp 67 are operated. And the first release switch 65,
By pressing the second release switch 66 at the same time, the work machine is controlled to be disconnected from the connecting device 11. At this time, the solenoid 52 operates and the hydraulic cylinder 34 contracts. After the work implement is removed from the coupling device 11, the mounting switch 68 is pressed to control the work implement to be mounted.
At this time, the solenoid 52 is turned off, and the connecting device 1
One hydraulic cylinder 34 extends. Thereby, the working machine is fixed to the connecting device 11. After the work machine is mounted, the lid 62 is closed and the operation ends.

Next, a third embodiment of the operating device for controlling the connecting device 11 will be described. As shown in FIG. 15, the operating device for controlling the connecting device 11 in the third embodiment includes:
It comprises a switch box 71 and a switch 77. On the upper surface of the switch box 71, a lamp 72 and a connection operation main switch 73 are provided. A switch 77 is provided at the upper end of the work implement lever 75. At the time of attachment / detachment operation by the connection device 11, the connection operation main switch 73 of the switch box 71 is set to “ON”. The hydraulic cylinder 34 of the connecting device 11 is contracted by turning on the switch 77 provided on the work implement lever 75. When the switch 77 is turned "OFF", the hydraulic cylinder 34 of the connecting device 11 is extended. In the third embodiment, the switch 7
Numeral 7 is "ON" while being pressed, and "OFF" when not being pressed.

The switch box 71 is disposed on the side of the driver's seat 74 disposed on the revolving unit 8, and a connection operation main switch 73 is provided on the upper surface of the switch box 71.
Are provided, and the connection operation main switch 73 is configured by a two-position switch. The connection operation main switch 73 is held in a state where it is set to “ON” or “OFF”. In the switch box 71, a lamp 72 is provided above the connection operation main switch 73 or on the side remote from the driver's seat 74. The lamp 72 is turned on or blinks when the connection operation main switch 73 is turned “ON”. At the same time, a buzzer (not shown) operates. This allows the operator to recognize that the connecting device 11 is being operated.

When the connection main switch 73 is turned "ON", the hydraulic cylinder 34 of the connection device 11 is maintained in an extended state, indicating that the disconnection operation preparation is completed. When the connection operation main switch 73 is turned “ON”, the hydraulic cylinder 34 of the connection device 11 is extended. Then, by pressing the switch 77 and turning it “ON”, the hydraulic cylinder 34 is contracted. The switch 77 is connected to the grip 7 attached to the tip of the left-hand working machine lever 75.
6, a connection operation main switch 7.
Reference numeral 3 is disposed on the right side of the driver's seat 74. Switch 77
Is disposed in front of the operator sitting in the driver's seat 74, and the connection operation main switch 73 is disposed on the side. That is, the switch 77 and the connection operation main switch 73 are not arranged in the same direction with respect to the operator sitting in the driver's seat 74. Thereby, the operation work of the connection device 11 follows a two-step procedure, and the operator can be surely recognized as the operation work of the connection device 11.

[0037]

As described above, the present invention has the following advantages. That is, in the control method of the connecting device with the hydraulic cylinder disposed at the tip of the arm of the turning work vehicle and connecting the working machine, the loading / unloading operation is performed by the operation display switch and the loading / unloading operation switch. Since the operation is performed by operating the two switches, the safety in attaching and detaching the working machine by the connecting device can be improved. Further, the operability in the loading / unloading operation can be improved.

As described in the second aspect, a switch with a lamp is used as the operation display switch, and the display device that affects the visual and auditory senses is operated by operating the switch. Performance can be improved. Further, the operability in the loading / unloading operation can be improved.

According to a third aspect of the present invention, an automatic return switch is used as a detachment operation switch, a circuit for storing the operation state of the switch is connected, and when the power supply is cut off, the operation of the switch is stored. Can be safely restarted even after the engine is switched off during the work. In addition, the safety in attaching and detaching the working machine by the connecting device can be improved. Further, the operability in the loading / unloading operation can be improved.

According to a fourth aspect of the present invention, in the method for controlling a connecting device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, a protective cover of the control device for controlling the connecting device is provided. The "open" signal activates the visual and auditory indicating device which indicates that the operation is ready, so that easy and safe operability can be obtained.

According to a fifth aspect of the present invention, in the control method of the connecting device with the hydraulic cylinder, which is disposed at the tip of the arm of the turning work vehicle and connects the working machine, the operation of the main switch of the loading / unloading device is performed after the operation. Since the operation of attaching and detaching the working machine is performed by the switch provided on the operation lever, the safety in the attaching and detaching operation of the working machine by the connecting device can be improved. Further, the operability in the loading / unloading operation can be improved.

According to a sixth aspect of the present invention, in the coupling device with a hydraulic cylinder disposed at the tip of the arm of the turning work vehicle and connected to the work machine, a solenoid valve for switching a hydraulic circuit to a hydraulic cylinder for mounting and dismounting the work machine. Is provided in addition to the cut-off valve and the traveling speed increase switching valve attached to the hydraulic pump that supplies pressure oil to the remote control valve for the working machine, so that the valve mechanism can be made compact. Thereby, the maintainability is improved and the manufacturing cost can be reduced.

According to a seventh aspect of the present invention, in the connecting device with a hydraulic cylinder disposed at the tip of the arm of the turning work vehicle and connected to the working machine, the hydraulic circuit to the working machine mounting / removing hydraulic cylinder is remote-controlled for the working machine. Since the branch is made from the upstream side of the cutoff valve attached to the hydraulic pump that supplies the pressure oil to the valve, the work machine can be detached and attached by the stable connecting device. Further, the operability in the loading / unloading operation can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a turning work vehicle.

FIG. 2 is a side view of the coupling device.

FIG. 3 is a diagram showing a mounting configuration of a working machine.

FIG. 4 is a plan view showing the operation device.

FIG. 5 is a front view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a rear view of the same.

FIG. 8 is a schematic diagram showing a circuit configuration of the operating device.

FIG. 9 is a schematic diagram showing an arrangement configuration of a hydraulic pump and a solenoid valve.

FIG. 10 is a schematic diagram showing a hydraulic circuit configuration for sliding a hydraulic cylinder.

FIG. 11 is a diagram showing a time schedule of the operating device.

FIG. 12 is a plan view of an operating device according to a second embodiment.

FIG. 13 is a side view of the same.

FIG. 14 is a schematic diagram showing a circuit configuration in the same manner.

FIG. 15 is a diagram showing a configuration of an operating device according to a third embodiment.

[Explanation of symbols]

 Reference Signs List 4 bucket 5 arm 6 boom 10 earth removal plate 11 connecting device 41 operating device 42 switch box 43 switch with lamp 44 lamp 45 rotary switch 46 lid

Claims (7)

[Claims] 1. A method of controlling a coupling device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, wherein a mounting / removing operation is performed by operating two switches using an operation display switch and a removable operation switch. A method for controlling a coupling device, the method comprising: 2. The control method according to claim 1, wherein a switch with a lamp is used as the operation display switch, and a display device that affects vision and hearing is operated by operating the switch. 3. An automatic return switch is used as a detachment operation switch, a circuit for storing an operation state of the switch is connected, and when power supply is cut off, operation storage of the switch is reset. The control method for a connection device according to claim 1, wherein 4. A control method of a connecting device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, is operated by an "open" signal of a protection cover of a control device for controlling the connecting device. A method of controlling a coupling device, characterized by activating a visual and auditory display device indicating ready. 5. A method of controlling a coupling device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, after operating a main switch of the loading / unloading device.
A method for controlling a coupling device, comprising: performing a mounting / removing operation of a working machine by using a switch provided on a working operation lever. 6. A connecting device with a hydraulic cylinder, which is disposed at the tip of an arm of a turning work vehicle and connects a working machine, a solenoid valve for switching a hydraulic circuit to a hydraulic cylinder for mounting / removing the working machine is provided as a remote control valve for the working machine. A coupling device provided in addition to a cut-off valve and a travel speed-up switching valve attached to a hydraulic pump that supplies pressure oil to the vehicle. 7. A connecting device with a hydraulic cylinder, which is arranged at the tip of an arm of a turning work vehicle and connects a working machine, supplies a hydraulic circuit to a working machine mounting / removing hydraulic cylinder to a working machine remote control valve. A connecting device that branches off from an upstream side of a cut-off valve attached to a hydraulic pump to be connected.