JP2502007B2 - Crane controls - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for operating a crane such as hoisting by a single or plural winches, boom hoisting, turning, and engine throttle.

[0002]

2. Description of the Related Art Generally, examples of operations carried out by a crane include hoisting operations for hoisting winches, boom hoisting operations, turning operations, engine throttle operations, drum brake operations, and the like. Of these, the operation of the drum brake is generally performed by depressing the pedal, and the other operations are performed by lever operation or grip operation.

Conventionally, an operation section is provided independently of each other for each type of operation described above. However, for example, the operation is performed during a combined operation such as turning operation, boom up / down operation, and hoisting winch operation at the same time. It becomes complicated and difficult to control. Therefore, in recent years, some of the above-mentioned operations are performed by lever operation, and the grip of the lever operated by the lever can be operated by grip operation (rotation operation).
It has come to be provided that the grip operation allows a different kind of operation from the above operation.

FIG. 4 shows an example of such a control device. In the figure, to the left front of the pilot seat 30,
A turning lever 31 for performing turning control is provided, and a boom raising / lowering lever 32 for performing boom raising / lowering control and a plurality of drum control levers 34 for selecting a winch drum to be used are provided on the right front side. A plurality of drum brake pedals 33 are provided in the lower part.
Further, a gripping portion of the turning lever 31 is a hoisting winch control grip 35 for controlling a hoisting winch, and a gripping portion of the boom hoisting lever 32 is an engine throttle control grip 36.

By operating the turning lever 31 while holding the winch control grip 35, the turning control is performed, and at the same time, by rotating the winch control grip 35, the winch control can be performed. Similarly, while performing the up-and-down operation by operating the boom up-and-down lever 32 while gripping the engine throttle operation grip 36, at the same time, by rotating the engine throttle operation grip 36 in this state, Engine throttle control can be performed.

Therefore, according to this control device, a total of four types of control can be performed while holding the two grips 35, 36.

[0007]

Generally, the above-mentioned grip operation is more difficult to perform fine operation than the lever operation, so that inconvenience occurs when performing fine control.

Conventionally, when a plurality of hoisting winches are independently operated, levers and grips are provided as many as the number of winches. However, a swivel lever 31 as shown in FIG. Since it is difficult to provide a winch other than the winch corresponding to this grip, the winch control lever and the grip must be independently provided at a position different from the turning lever 31.

In view of such circumstances, it is an object of the present invention to provide a crane control device capable of smoothly performing complex work and also capable of performing fine operation, and more preferably It is an object of the present invention to provide a crane control device that enables independent control of each winch without increasing the number of operating parts, even in a crane having a plurality of winches.

[0010]

DISCLOSURE OF THE INVENTION The present invention relates to a crane control device for controlling a plurality of types of operations in a crane, and a first operating portion for controlling one of the plurality of types of operations described above. A second operation unit for performing a different type of operation from the operation by the first operation unit, and the first operation unit is configured such that the first operation unit is operated by a lever;
The second operating portion is lever-operated integrally with the selection lever operating portion which is lever-operated, and the first operating portion, and
The selection grip operating section is configured to be operated independently of the operation section, and the lever operation mode and the selection grip in which the operation corresponding to the second operation section is performed based on the operation amount of the selection lever operating section. It is provided with a steering mode switching means for switching the steering mode to the grip operation mode performed based on the operation amount of the operation section (Claim 1).

Further, the second operation section is a winch operation section corresponding to a plurality of hoisting winches, and the winch operation section is common to a plurality of winch lever operation sections corresponding to the respective hoisting winches and each hoisting winch. In addition to configuring with a single winch grip operating part,
By providing the winch selecting means for selecting the hoisting winch to be steered based on the operation amount of the selected grip operation unit when the grip operation mode is selected, more excellent effects as described below can be obtained. (Claim 2).

[0012]

In the device according to claim 1, when the steering mode is switched to the lever operation mode by the mode switching means,
It is possible to perform control with excellent fine operability by using the selection lever operation unit. On the other hand, in a complex work in which the operation by the first operation unit and the operation by the second operation unit are simultaneously performed, the operation mode is switched to the grip operation mode by the mode switching means while gripping the selected grip operation unit. At the same time as operating the lever by operating the first operating portion and operating the selection grip operating portion independently of the first operating portion (that is, by performing relative rotation operation with respect to the first operating portion). ), The operation corresponding to the second operation unit can be performed.

Further, in the apparatus according to the second aspect of the present invention, by selecting the winch that needs to be steered by the steering winch selecting means, it is possible to steer an arbitrary winch by the grip operation of the common winch grip operating section.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.

This device includes a winch hoisting lever (winch lever operating section) 1, a winch hoisting grip (winch grip operating section) 3, a turning lever (first operating section) 4, an engine throttle grip 5, and a boom hoist. A lever 6 and a changeover switch 7 are provided, all of which are provided in the cockpit.

The winch hoisting lever 1 can be operated by a lever, and the hoisting winch is controlled by operating the winch hoisting lever 1 in a specific case described later. Similarly, the turning lever 4 and the boom hoisting lever 6 can also be operated by levers, and the turning operation and the hoisting operation of the boom can be performed by the operation amounts thereof.

The winch winding grip 3 is shown in FIG.
As also shown in FIG. 3, it is provided at an upper end portion of the turning lever 3, that is, a portion gripped when the turning lever 4 is steered, and is configured to be rotatable relative to the turning lever 4. The winch hoisting grip 3 is connected with a potentiometer 8 for detecting the amount of rotational operation of the winch hoisting grip 3, and the detection signal thereof is input to the control panel 10. Similarly, the engine throttle grip 5 is also provided at an upper end portion of the boom hoisting lever 6, that is, a portion gripped when the boom hoisting lever 6 is manipulated, and is configured to be relatively rotatable with respect to the boom hoisting lever 6. Has been done.

The changeover switch 7 is for changing the winch operation mode between a lever operation mode and a grip operation mode, which will be described later, and the changeover signal is input to the control panel 10.

Next, a hydraulic circuit for controlling the drive of the hoisting winch based on the operation amounts of the winch hoisting lever 1 and the winch hoisting grip 3 will be described.

In the figure, reference numeral 12 is a pilot hydraulic pump, and 14 is a pilot tank, which are connected to one primary side port of a 4-port electromagnetic switching valve 18a via an electromagnetic proportional pressure reducing valve 16a, and It is connected to one of the primary-side ports of the 4-port electromagnetic switching valve 18b via the electromagnetic proportional pressure reducing valve 16b. At the same time, the hydraulic pump 12 and the tank 14 are connected to the other primary side port of the electromagnetic switching valve 18a via the pilot pressure reducing valve 21a, and at the electromagnetic switching valve 18b via the pilot pressure reducing valve 21b. It is connected to the other primary port. Only one outlet port of the solenoid operated directional control valve 18a is connected to one pilot portion of the winch directional control valve 20 that controls the drive of the hoisting winch, and the solenoid operated directional control valve 18 is operated.
Only the outlet port on one side of b is connected to the other pilot portion of the winch directional control valve 20.

Here, the pilot pressure reducing valves 21a, 2 are
1b is connected to the winch hoisting lever 1, and the set pressure of the pilot pressure reducing valve on the side where the winch hoisting lever 1 is operated is increased with an increase in the lever operation amount. Solenoid switching valve 18
a and 18b are connected to each other so that the secondary pressures of the pilot pressure reducing valves 21a and 21b become the two pilot pressures of the winch directional control valve 20, respectively, in the state where they are switched to the left position in the diagram, and In the state of being switched to the position, both are connected so that the secondary pressures of the electromagnetic proportional pressure reducing valves 16a and 16b become both pilot pressures of the winch directional control valve 20, respectively.

The control panel 10 includes the electromagnetic proportional pressure reducing valve 16 described above.
a, 16b electromagnetic solenoids and electromagnetic switching valves 18a, 1
It is connected to the electromagnetic solenoid 8b and is configured to perform the following control based on the input signals from the potentiometer 8 and the changeover switch 7.

(A) When the lever operation mode is selected by the mode changeover switch 7, the electromagnetic changeover valves 18a, 18b are selected.
Is switched to the left position in the figure, and when the grip operation mode is selected, the electromagnetic switching valves 18a and 18b are switched to the right position in the figure.

(B) The secondary pressure of the electromagnetic proportional control valves 16a, 16b is controlled based on the rotational operation amount of the winch control grip 3 detected by the potentiometer 8. More specifically, the electromagnetic proportional control is performed so that the operation content of the winch control grip 3 detected by the potentiometer 8 and the drive direction and drive speed of the hoisting winch actually controlled by the winch directional control valve 20 match. Valves 16, 16
The secondary pressure of b is controlled (it becomes the pilot pressure of the winch directional control valve 20 when the electromagnetic switching valves 18a and 18b are in the right position).

That is, the control panel 10 and the electromagnetic switching valve 1
8a and 18b constitute a mode switching means for switching the steering mode between the lever steering mode and the grip steering mode.

Next, the operation of this device will be described.

First, when only the hoisting winch is operated independently, the winch operation mode may be switched to the lever operation mode by operating the changeover switch 7.
In response to the signal from the changeover switch 7, the control panel 10 switches the electromagnetic changeover valves 18a and 18b to the left position in the figure,
The secondary pressure of the pilot pressure reducing valves 21a and 21b connected to the winch hoisting lever 1 becomes the pilot pressure of the winch direction control valve 20. Therefore, by operating the winch hoisting lever 1 in this state, the winch hoisting operation can be performed, and the fine operation can be easily performed as compared with the case where the winch hoisting grip 3 is used.

On the other hand, when a plurality of types of maneuvers including winch hoisting maneuvers and turning maneuvers are carried out simultaneously (when carrying out complex work), the changeover switch 7 may be switched to the grip operation mode. By this switching, the control panel 10 switches the electromagnetic switching valves 18a and 18b to the right position in the figure,
The secondary pressure of the electromagnetic proportional pressure reducing valves 16a, 16b becomes the pilot pressure of the winch directional control valve 20, and the secondary pressure is controlled by the control panel 10 according to the rotational operation amount of the winch winding grip 3.

Therefore, in this state, by operating the turning lever 4 as a whole while gripping the winch winding grip 3, the winch winding grip 3 is grip-operated at the same time as turning control is performed (turning lever 4).
In contrast, the winch hoisting grip 3 is relatively rotated), whereby the winch hoisting operation can be performed. That is, both the turning operation and the winch hoisting operation can be performed simultaneously while gripping the single winch hoisting grip 3.

As described above, according to this control device, when the complex work is not required, the operation mode is switched to the lever operation mode, so that the operation using the winch hoisting lever 1, that is, the operation excellent in fine operability is performed. On the other hand, during the combined operation, by switching to the grip operation mode, it is possible to easily simultaneously perform the turning and the winch hoisting while holding the winch hoisting grip 3.

In this embodiment, the swing lever 4 is provided with the winch hoisting grip 3. However, the types of operation corresponding to these levers and grips are not limited to the above-mentioned turning and winch hoisting, and, for example, a boom. The hoisting lever and the boom hoisting steering grip may be provided together, and the boom hoisting steering grip may be provided at the end of the turning lever, winch hoisting lever or the like.

Next, a second embodiment will be described with reference to FIG. Here, if the crane has multiple winches,
For example, in the case of having two winches, a main winch and a supplementary winch, an example will be described in which the hoisting operation of each winch is performed by a single winch hoisting grip 3.

As shown, for the main winding winch,
The winch hoisting lever 1 and the electromagnetic switching valve 1 of the above embodiment
8a, 18b, winch directional control valve 20, and pilot pressure reducing valves 21a, 21b, which are the same as the main winding winch hoisting lever 1A and main winding electromagnetic switching valves 181a, 181.
b, the main winding winch directional control valve 201, and the main winding pilot pressure reducing valves 211a and 211b. For the auxiliary winding winch, the auxiliary winding winch winding lever 1B, the auxiliary electromagnetic switching valves 182a and 182b, and the auxiliary winding are provided. Winch direction control valve 202, and auxiliary winding pilot pressure reducing valve 212a,
It is equipped with 212b. The primary side ports of the main winding electromagnetic switching valve 181a and the auxiliary winding electromagnetic switching valve 182a are connected to the secondary side ports of the common electromagnetic proportional pressure reducing valve 16a, respectively. The primary side ports of the electromagnetic switching valve 182b and the auxiliary winding 181b are connected to the secondary side ports of the common electromagnetic proportional pressure reducing valve 16b.

On the other hand, the control panel 10 has a winch selection switch 24 in addition to the changeover switch 7 in the above embodiment.
Is connected. This winch selection switch 24
The main winch and the auxiliary winch are used to specify a winch to be operated. The winch selection switch 24 may be a switch for selectively selecting the control target switch, or a switch for selecting at least one of the two switches (that is, both can be specified). Thing).

The command signal of the winch selection switch 24 is input to the control panel 10. When the control panel 10 is switched to the lever operation mode by the mode changeover switch 7, the electromagnetic changeover valves 181a and 181b corresponding to the winch selected by the winch selection switch 24 are selected.
Only (or 182a, 182b) is switched to the right position in the drawing, and the electromagnetic switching valves 182a, 182b (or 181a, 181b) corresponding to the unselected winches are switched to the left position in the drawing.

That is, the control panel 10 and the winch selection switch 24 constitute winch selection means for selecting the winch to be operated from among the two winches.

According to such a device, when performing a combined operation including a turning operation and a main winding winch hoisting operation or an auxiliary winding winch hoisting operation, the operation mode is switched to the grip operation mode by the mode changeover switch 7, and By selecting the winch to be operated with the winch selection switch 24, while operating the turning lever 4, the winch hoisting grip 3 provided on the turning lever 4 can be rotated to perform a desired winch hoisting operation. it can. That is, according to this apparatus, as in the above-described embodiment, the swing lever 4 is provided with only the single winch hoisting grip 3, and both the main winding winch hoisting and the auxiliary winding winch hoisting are swivel operations. Can be done at the same time.

The winch selection switch 24 is used for the main winding,
When both winches for supplementary winding are selected, both winches may be simultaneously operated by an amount corresponding to the rotation operation amount of the winch winding grip 3.

Also in this embodiment, the type of lever on which the winch hoisting grip 3 is provided is not limited, and the winch hoisting grip 3 may be provided on, for example, a boom hoisting lever or an engine throttle lever.

When the number of winches is three or more,
For example, when the crane has a main winding winch, an auxiliary winding winch, and a third winch, the winch selection switch 24 is configured to be selectively selectable from three options.
For each winch, an electromagnetic switching valve similar to the electromagnetic switching valves 18a, ... Is provided, and the control panel 10 may be configured to switch each electromagnetic switching valve so that only the selected winch can be operated by grip operation. .

The term "grip operation" in the present invention includes various operations for rotating the grip with respect to the lever. Further, the specific shape and structure of the grip may be set as appropriate, and any grip capable of performing the above-described rotation operation may be used.

[0042]

As described above, the present invention is provided with the first operating portion and the second operating portion, the first operating portion is operated by the lever, and the second operating portion is operated by the lever. Section and a selection grip operating section that is lever-operated together with the first operating section, and is grip-operated by itself, and the operation mode for steering corresponding to the second operating section is set to the selection lever operating section. Since it is equipped with a mode switching means for switching between the lever operation mode in which the steering is performed by the steering wheel and the grip operation mode in which the steering is performed by the selection grip operating section, in the state where the steering mode is switched to the lever operating mode, While manipulating with excellent fine operability by the selection lever operation part, grasp the selection grip operation part with the operation mode switched to the grip operation mode. While the maneuver and can be performed simultaneously and easily by the steering and selecting grip operation of the operation by the operation of the first operating unit, there is an effect that it is possible to respond better to the composite work.

Further, according to the second aspect of the invention, by selecting the winch desired to be operated by the grip operation by the winch selecting means, the operation of a plurality of winches can be covered by a single winch grip operating section. Therefore, there is an effect that the control device can be simplified.

[Brief description of drawings]

FIG. 1 is a hydraulic control circuit diagram of a control device for a crane according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a turning lever and a winch winding grip provided on the control device.

FIG. 3 is a hydraulic control circuit diagram of a crane manipulator according to a second embodiment of the present invention.

FIG. 4 is an external perspective view of a conventional crane control device.

[Explanation of symbols]

1, 1A, 1B Winch hoisting lever (winch lever operation part) 3 Winch hoisting grip (winch grip operation part) 4 Swing lever (first operation part) 7 Mode changeover switch (constituting mode changeover means) 10 Control panel (mode changeover) Means and winch selection means) 18a, 18b Electromagnetic switching valve (mode switching means) 24 Winch selection switch (winch selection means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-49-44451 (JP, A) Jikkouhei 3-449 (JP, Y2)

Claims (2)

(57) [Claims] 1. A crane control device for controlling a plurality of types of operations in a crane, wherein a first operation part for operating one of the plurality of types of operation and a operation by the first operation part are different. A second operation part for performing a kind of control, the first operation part is configured such that the first operation part is operated by a lever, and the second operation part is operated by a lever operated by a lever. And a selection grip operating unit that is lever-operated integrally with the first operating unit and that is grip-operated independently of the first operating unit.
Steering for switching the steering mode between a lever operation mode in which the operation corresponding to the second operation unit is performed based on the operation amount of the selection lever operation unit and a grip operation mode in which the operation is performed based on the operation amount of the selection grip operation unit. A crane control device comprising mode switching means. 2. The crane control apparatus according to claim 1, wherein the second operation section is a winch operation section corresponding to a plurality of hoisting winches, and the winch operation section is a plurality of winches corresponding to the hoisting winches. A hoisting winch which is composed of a lever operation part and a single winch grip operation part common to each hoisting winch, and which is operated based on the operation amount of the selected grip operation part when the grip operation mode is selected. A control device for a crane, comprising: a winch selection means for selecting.