JPH11303149A - Front size changing device of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an operator to easily change front size data set by control of the front of a hydraulic shovel or the like, when replacing a part of the front, and to immediately control the front without hindrance at a construction site. SOLUTION: A front which performs work and a front control part 45 which controls the working action of the front according to size data which are given in advance for each of members constituting the front are provided. Controllers 32, 33 which, when an operator performs work at a working site while replacing the member constituting the front with other different sized member, indicate the size data for the other replacement member and setting means 42, 43, 44 for setting the size data inputted through the controllers into the front control part and for replacing the previous size data with the new size data inputted are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front dimension changing device for a construction machine, and more particularly to a construction machine such as a hydraulic shovel configured to perform a front control, which is stored for control when a part of the front device is replaced. The present invention relates to a front dimension changing device capable of easily changing the given dimension data to the dimension data of a new member replaced on site.

[0002]

2. Description of the Related Art There has been known a construction machine such as a hydraulic shovel having an electronic control unit composed of a computer and performing front control.

For example, in front control of a hydraulic excavator,
Regarding the operation of a working machine unit including a boom, an arm, a bucket, and the like, that is, the operation of a front device (hereinafter, referred to as “front”), dimensions of each front unit are stored in advance in a storage unit of an electronic control device (hereinafter, referred to as “controller”) including a computer. In this way, the operation of the front is controlled. Particularly, in the front control, for example, the operation of the hydraulic shovel is stopped urgently so as to prevent the position of the front from changing to an unexpected place during the operation of the front and not to damage the vehicle body of the excavator. That is, control for preventing interference (offset type) and control for restricting the movement area (when a two-piece boom is provided or work in a narrow place) are performed. Therefore, a controller that performs front control is required to store dimensional data of each part of the front with correct values in its storage unit.

[0004] On the other hand, a part of the front including a boom, an arm, a bucket, and the like may be changed at a work site according to the necessity of work. When a part of the front is changed to another size, normal front control cannot be performed unless front dimension data used in the front control is changed according to the changed front member. For this reason, in a conventional front control system for a hydraulic excavator, front dimension data is prepared for each variation in consideration of the variation of the front, and the dimension data for front control can be changed according to a customer's request.

[0005]

The conventional configuration in which the above change can be made relates to a front variation prepared for each manufacturer. Some customers attach front members of other manufacturers that do not comply with the standards of the manufacturer. In such a case, the conventional system could not immediately respond to the change of the front.
From the user's point of view, in the work using the front of a hydraulic excavator of a certain manufacturer, the fact that the front control cannot be performed when a part of the front is replaced by another manufacturer does not follow the actual situation of the work. Is a big problem.

[0006] The above problem of the front control in the conventional hydraulic excavator does not correspond to the current state of the work by the front change by the user, and is very inconvenient.
Therefore, conventionally, even when a front member of another manufacturer is mounted on the front of a hydraulic excavator of a certain manufacturer, it has been demanded that front control can be promptly performed. This is not a problem limited to the excavator, but is demanded by construction machines in general.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. In the front control of a construction machine such as a hydraulic excavator, when the front needs to be frequently changed, for example, the operator can easily change the front. It is an object of the present invention to provide a front dimension changing device for a construction machine which can change front dimension data set by front control and can immediately respond to it on site without any trouble with front control.

[0008]

A front dimension changing device for a construction machine according to the present invention is configured as follows to achieve the above object. The first front dimension changing device (corresponding to claim 1) includes a front device (part of a working machine) that performs an operation, and an operation of the front device based on dimensional data given in advance for each member constituting the front device. It is provided with a front control means for controlling the operation, and is applied to a construction machine in which a user replaces a member constituting the front device with another member having a different size at the work site and performs the above-mentioned work, and is replaced. It is provided with instruction operation means for instructing dimension data of another member, and setting means for setting the dimension data input through the instruction operation means to the front control means and changing it to the previous dimension data. . In the front dimension changing device applied to the construction machine, the front control executed by the front control means uses dimension data stored in advance corresponding to the mounted front device. When changing the front device, the dimensional data of the newly mounted front device is input by the instruction operation means, and stored in the storage unit of the front control means by the setting means. In the subsequent front control, front control such as area restriction control is performed using the dimension data of the new front device. The change of the dimensional data of the front device can be easily performed by a driver (operator) at a work site. There is no need to rely on a specialist in charge of the manufacturer of the construction machine, and the construction can be easily performed on site. Also, when a front device of another maker different from the maker of the construction machine is installed, similarly, the dimension data can be easily changed, so that there is no inconvenience in performing the front control. In a second front dimension changing device (corresponding to claim 2), in the above configuration, the instruction operating means is front dimension switching means for outputting a selection signal of the dimension data, and the setting means is provided with a reference dimension data and a reference dimension data. Storage means for storing correction data, and calculation means for inputting a selection signal and calculating dimensions of other members using the selection signal and the dimension data and correction data stored in the storage means. Features.
In this configuration, since other dimension data can be set by changing the correction data, the only easy dimension data is the reference dimension data, and it is not necessary to prepare a large number of dimension data. This is convenient when changing to a front dimension that is not supported by the manufacturer of the construction machine body. A third front dimension changing device (corresponding to claim 3) is characterized in that, in the above configuration, the correction data is preferably an increase / decrease rate. A fourth front dimension changing device (corresponding to claim 4) is characterized in that, in the above-described configuration, the correction data is preferably an adjustment rate. Fifth front dimension changing device (Claim 5)
In the above configuration, the other member is preferably a bucket attached to the front end of the front device. Usually, a bucket, which is provided at the front end of the front device and is a member for performing work, is the most changed element.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The front size changing device according to the present invention is preferably applied to a front control device of a hydraulic shovel shown in FIG. The hydraulic excavator includes a lower traveling body 11 provided with a traveling hydraulic motor (not shown) and the like, and a turning hydraulic motor (not shown) provided on the lower traveling body 11.
A swivel device 12 rotatably configured by the above and the like, and an upper swivel body 13 as a working machine main body that is rotatably mounted on the lower traveling body 11 by the swivel device 12 are provided. Further, the upper revolving unit 13 is a revolving frame 1 that forms a frame structure.
4 and a cab 1 provided on the front side of the turning frame 14
5 and a turning frame 14 located on the rear side of the cab 15
It comprises a counterweight 16 provided above, and working devices, namely a front 17 and a machine room 18. The front 17 includes a boom 17A rotatably provided at a front portion of the revolving frame 14, an arm 17B rotatably provided at a tip side of the boom 17A, and an arm 17B.
And a bucket 17C provided on the tip side of the
These are driven by a boom cylinder 17D, an arm cylinder 17E, and a bucket cylinder 17F, respectively. The machine room 18 is formed in a box shape, and a diesel engine 19 is provided inside the box-shaped machine room 18.

In the above-mentioned hydraulic shovel, the hydraulic pump for driving the lower traveling body 11, the hydraulic motor for turning of the turning device 12, and the cylinders 17D, 17E, and 17F of the working device are appropriately supplied from the hydraulic pump in the machine room 18. The operation such as running, turning, and excavation and various operations are performed by supplying the pressurized oil. The hydraulic excavator is controlled by an electronic control system including a digital operation unit (digital computer) in controlling the operation of a hydraulic valve for operating the front 17 or the operation of the diesel engine 19. This electronic control system includes a controller 100 having a function of executing various controls. The controller 100 includes a data storage unit and means for executing front control. In the front control, for example, the above-described control for preventing interference is performed. Therefore, dimension data of members forming each part of the front 17 is stored in the data storage unit of the controller 100 in advance. When the front 17 replaces the bucket 17C with a member of another size, for example, dimension data corresponding to the replaced bucket is set by a method described later. When the work is started with the replaced bucket, the front control is executed using the newly set dimension data.

FIG. 2 shows an inside front portion of the cab 15.
In FIG. 2, reference numeral 21 denotes a windshield, and the front can be visually recognized through the windshield 21. A pair of traveling levers 22 and 23 are arranged at a front portion of the seat at a position in front of the seat. The left traveling lever 22 controls the operation of the left traveling body, and the right traveling lever 23 is used to control the operation of the right traveling body. By operating the traveling levers 22 and 23 in the front-rear direction, an operation signal corresponding to the operation amount is output from a signal generator provided on the base. Driver's cab 15
Is a pedal that controls the supply of pressure oil to the offset cylinder, and a pedal 25 is an accelerator pedal. Further, an operation panel 26 is provided on the front part, and various operation devices and meters are provided on the operation panel 26. In the illustrated example, only two rotary knobs 32a and 33a used to change the front dimension data related to the features of the present invention are shown. This operation panel 26
Is provided with an instruction operation unit for instructing dimension data of the front dimension switching device.

Next, referring to FIG. 3, a detailed configuration of the above-described front size switching device, training of a controller corresponding thereto, and a selection signal given from the front size switching device to the controller will be described.

In FIG. 3, for example, two operating devices 32 and 33 are provided on the operation surface of the front size switching device 31 in a place that is easy for the operator to see and operate. The operating devices 32 and 33 are provided with knobs 32a and 33a that rotate clockwise or counterclockwise, respectively.
Scales are provided around circles drawn around 2a and 33a. The front dimension switching device 31 according to the present embodiment is premised on exchanging the bucket 17C provided at the front end of the front as an example. Therefore, FIG.
The left operating device 32 is an operating device for outputting the selection signal s1 relating to the change of the bucket width, and the right operating device 3
3 is a selection signal s2 for specifying a dimension related to a bucket arc.
Is an operation device for outputting the Here, “bucket arc” means an arc drawn by a portion of the bucket on the front side from the arm connection portion. In the front size switching device 31, when the knobs of the respective operating devices are set so as to face the vertical direction in FIG. 3, a selection signal relating to the standard is output. Here, “standard” refers to a case where dimension data stored in advance in the control calculation data storage unit 42 of the controller 41 is used as described later. Actuators 32, 33
With respect to such a standard setting, an increase rate is specified when the counterclockwise rotation is performed, and a decrease rate is specified when the clockwise rotation is performed. Signals relating to these increasing rates or decreasing rates are provided to the controller 41 as selection signals s1 and s2. Actually, in the operating devices 32 and 33, a potentiometer or the like is built in the electric circuit, and the knobs 32a, 32a,
A level signal corresponding to the rotation operation angle of 33a is output as a selection signal. The selection signal may be an analog signal, or may be used after being converted into a digital signal by an A / D converter or the like. Actuator 32, 3
The signal related to the operation amount designated by the rotation of each knob of No. 3 is sent to the controller 41 side.

The controller 41 provided for the front dimension switching device 31 is formed as a digital circuit and is a part of the controller 100. The controller 41 has a function for setting newly designated dimension data and a function for controlling the front. It has a function to execute. The selection signals s1 and s2 output by operating the operation devices 32 and 33 of the front dimension switching device 31 are input to the front selection signal input unit 43. Next, the front dimension calculation unit 44 generates dimension data used in the front control. The front dimension calculation unit 44 fetches the stored front dimension reference data prepared in advance in the control calculation data storage unit 42, and selects signals s1 and s2 sent from the front switching device 31 through the front selection signal input unit 43. That is, data relating to an increase / decrease rate (or expansion rate) is input.
Then, multiplication is performed using the front dimension reference data and the data of the increase / decrease rate, thereby calculating the front dimension data required for the front control. The control front dimensions obtained by the calculation are sent to the front control unit 45. The front control unit 45 performs front control prepared by a program in advance, for example, interference prevention control, using the control front dimensions given from the front dimension calculation unit 44.

The operation of changing the front dimensions in the controller 41 will be described in detail with reference to the flowchart shown in FIG. The flowchart shown in FIG. 4 is executed by a front dimension changing program stored in the ROM in the controller 41. In the first step S11, front dimension reference data is read from a readable / writable nonvolatile storage unit. The readable / writable volatile storage unit is included in the control operation data storage unit 42 due to the circuit configuration, and operates under the control of the control operation data storage unit 42. In the next stage, it is determined whether the read front dimension reference data is normal (step S12). If the read data is abnormal, the substitute value is used (step S13). Next, similarly, the data of the increase / decrease rate is read from the readable / writable nonvolatile storage unit (step S14). The data of the increase / decrease rate is data in which several increase / decrease rates are set in stages. It is determined whether the read data of the change rate is normal or not (step S15). In the case of an abnormality, an appropriate substitute value is used (step S1).
6).

The above steps S12, S13, S15,
S16 is a step for checking the normality / abnormality of the data each time since the front control is generally a control for ensuring safety, and is a step for ensuring safety.

The selection signals s1 and s2 sent from the front switching device 31 are read in the presence of the front dimension reference data and the data of the increase / decrease rate read out from the control operation data storage section 42 as described above (step). S1
7). Then, desired front dimension data required for front control is calculated according to the read selection signals s1 and s2. This front dimension is obtained by multiplying the front dimension reference data by the increase / decrease rate specified by the selection signal, as is apparent in step S18. The calculated front dimensions correspond to the actual dimensions of the new replaced bucket.

The process of changing the front dimensions according to the change of the bucket at the front 17 is performed periodically.
On the controller 41 side, the front dimension switching device 31
It is periodically checked whether or not the selection signals s1 and s2 from are input. Unless the selection signals s and s2 are changed, the previous front dimensions are used by the front control. When the operator changes the bucket at the front end of the front 17 to a member of another size on site, the operator immediately operates the front size switching device 31 provided in the cab 15 before or immediately after the change, thereby immediately changing to a standard size. In order to reset the bucket width or the arc of the member to correspond to the changed bucket, the control front dimensions required for the front control are immediately changed according to the flowchart shown in FIG. Therefore, the front control can be immediately executed for the new bucket. Also, as shown in FIG.
The data stored in 2 can be freely changed in the readable / writable nonvolatile storage section as described above.
The front dimension reference data set in the control calculation data storage section 42 can be freely rewritten by externally providing change data via the input section 46.
Further, as described above, the control front dimensions obtained by the calculation in the front dimension calculation section 44 can be displayed on a monitor 48 attached to the controller 41 via the output section 47 to notify the operator.

In the above description, the use of the control calculation data in the front dimension calculation unit 44 is performed as long as the power is not turned off, as long as the signal input to the front selection signal input unit 43 from the front dimension switching unit 31 does not change, or The operation is continued unless the data stored in the operation data 42 is changed. When the power is turned on, the control dimension is calculated by the front dimension calculating unit 44 based on the signal input from the front dimension switching unit 31 to the front selection signal input unit 43 and the data from the control calculation data storage unit 42. The used data is used as is.

As is apparent from the above description of the embodiment, according to the front size changing apparatus for front control according to the present embodiment, when the front bucket or the like is changed on site, the control front size of the bucket is changed. Can be easily changed immediately. In the above embodiment, the change of the front bucket, that is, the change of the bucket width and the front dimension of the bucket arc has been described. However, it is needless to say that the same configuration can be applied to the change of other members of the front.

Further, according to the front size switching device 31 according to the above-described embodiment, the operating devices 32 and 33 are constituted only by rotary knobs 32a and 33a and a scale around the standard drawn in a circular shape around the rotary knobs 32a and 33a. Therefore, there is an advantage that the configuration is simple, easy to handle, and there is no possibility of erroneous operation. Further, since the configuration is simple, the apparatus can be realized at low cost. Further, it is needless to say that the above-described embodiment can be configured to include, for example, a display unit (display) and a numeric keypad, and to directly input numerical data of the changed dimensions of the bucket and the like. Alternatively, a dial type operation device can be provided. In the configuration according to the above-described embodiment, it is sufficient to prepare the front dimension reference data corresponding to the standard and the data of the increase / decrease rate, and it is necessary to store a plurality of front dimension data in the storage unit 42 of the controller 41. Since there is no,
Easy.

Further, in the above-described embodiment, when a part of the front is replaced and a new front member is used, the front dimension reference data corresponding to the standard front member is corrected to control the front dimension corresponding to the new front member. Create data for In this case, the data used for correction is not limited to the above-mentioned increase / decrease rate. For example, an adjustment value can be used, and other similar correction data can also be used. When the adjustment value is used as the correction data, the instruction input sections of the operating devices 32 and 33 are also changed according to the adjustment value. The operation performed in step S18 is also addition or subtraction. When other correction data is used, the configurations of the operating devices 32 and 33 and the calculation contents of step S18 are changed accordingly.

[0024]

As is apparent from the above description, according to the present invention, when a part of the front apparatus is changed with a construction machine such as a hydraulic shovel, the operator can control the front dimensions required for the front control on site. It can be easily changed and set, so that, for example, it is possible to easily cope with front dimensions that are not supported by the manufacturer. Further, the operator can easily change the front dimensions particularly at a work site where the front device needs to be frequently changed. As a result, it is possible to achieve a reduction in the time required to change the front dimensions or a reduction in the operation unavailability. Further, the configuration in which the front dimensions are selected by designating the standard data and the increase / decrease rate with respect to the standard data does not need to prepare a plurality of front dimension reference data in the storage unit of the control device, so that the configuration becomes easy.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel as an example of a construction machine.

FIG. 2 is a diagram showing a front portion of the cab provided with an operating device.

FIG. 3 is a configuration diagram showing a relationship between a front dimension switching device and a controller.

FIG. 4 is a flowchart showing a front dimension changing process at the time of control.

[Explanation of symbols]

 15 Operator's cab 17 Work device (front) 22, 23 Travel lever 31 Front dimension switching device 32, 33 Operator 32a, 33a Knob 41, 100 Controller s1, s2 Selection signal

Continued on the front page (72) Inventor Toshiaki Nishida 650, Kandamachi, Tsuchiura-shi, Ibaraki Pref.

Claims (5)

[Claims] 1. A front device for performing work, and front control means for controlling a work operation of the front device based on various dimensional data given in advance for each member constituting the front device, the front device being used at a work site. In a construction machine in which a user replaces a member constituting the front device with another member having a different size, and performs the work, instruction operation means for instructing dimension data of the replaced other member; and the instruction operation means. A setting unit for setting the dimension data input through the front control unit and changing the dimension data with the previous dimension data. 2. The instruction operating means is a front dimension switching means for outputting a selection signal of the dimension data, and the setting means is a storage means for storing reference dimension data and correction data; And a calculating means for calculating the dimensions of the other member using the selection signal and the dimension data and the correction data stored in the storage means. Front dimension changing device for construction machinery. 3. The apparatus according to claim 2, wherein the correction data is an increase / decrease rate. 4. The apparatus according to claim 2, wherein the correction data is an adjustment value. 5. The front dimension changing device for a construction machine according to claim 1, wherein the other member is a bucket attached to a front portion of the front device.