JP2874158B2 - Installation attachment discrimination device for work attachment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work attachment mounting combination discriminating apparatus in a safety device for a construction machine equipped with an ultra-long front.

[0002]

2. Description of the Related Art FIG. 4 is a side view of a hydraulic excavator having a safety device according to the prior art and having a work attachment 1 mounted thereon. In the figure, 2 is a lower traveling body of a hydraulic shovel, 3 is an upper revolving superstructure, 4 is a controller arranged on the upper revolving superstructure 3, 5 is a main boom which is a long boom, 6 is an intaboom, 7 is an arm, 8 is a dismantling crusher as a working tool, 9 is a proximal end boom of the main boom 5, 10 is a distal end boom, 11 is a first joint boom,
Reference numeral 12 denotes a second relay boom, 13 denotes a hydraulic cylinder for a boom, 14 denotes a hydraulic cylinder for an intubum, 15 denotes a hydraulic cylinder for an arm, 16 denotes a hydraulic cylinder for a crusher, 17,
18 and 19 are angle detectors, L1 is the total length of the main boom 5, L2 is the total length of the intub boom 6, L3 is the total length of the arm 7, 0-0 'is the center of rotation of the upper swing body 3, R1,
R2 indicates the working radius of the tip of the arm 7 that changes when the work attachment 1 is operated.

Next, a prior art safety device will be described with reference to FIG. In the prior art, the main boom 5, the intaboom 6, the arm 7, and the crusher 8 are sequentially connected to the front part of the hydraulic excavator to form a super-long work attachment 1, and the hydraulic cylinders 13, 14, 15, and 16 respectively use the hydraulic cylinders 13, 14, 15, and 16. The main boom 5
Is divided into a proximal end boom 9 and a distal end boom 10, and a first intermediate boom 11 and a second intermediate boom 12 are attached and combined as required between the proximal end boom 9 and the distal end boom 10. I can do it. Then, angle detectors 17, 18, and 19 are provided on the base end boom 9, the distal end boom 10, and the arm 7, and the controller 4 is provided on the upper swing body 3, and detection signals from the angle detectors 17, 18, 19 are provided. Is input to the controller 4, the controller 4 calculates the horizontal distance from the center of rotation of the upper revolving unit 3 to the tip of the arm 7 based on the detection signal, and the tip of the arm 7 is determined based on the calculation result. An alarm command signal is output to an alarm device (not shown, for example, a bell) before attempting to go outside the operable radius of the alarm.

[0004]

In an ultra-long work attachment equipped with a crusher, the total length of the main boom is adjusted according to the height of a dismantling structure, such as a building to be dismantled or a chimney. That is, when the main boom is made the shortest, the distal end of the proximal boom is directly connected to the proximal end of the distal boom, and when the main boom is extended, a single boom is placed between the proximal boom and the distal boom. Attach and install multiple inner booms. FIG. 5 shows the proximal boom 9.
It is a side view which shows the main boom 5 'which attached only the 1st intermediate | middle boom 11 between the boom 10 and the front side boom. The total length 1 of the main boom 5 'is shorter than the total length L1 of the main boom 5 by the length of the second relay boom 12, but the maximum operable radius when the main boom 5' is attached (in the case of this embodiment, the turning radius). (The horizontal distance from the center to the arm 7) rmax is larger than the maximum workable radius Rmax when the main boom 5 is mounted. When the total length of the main boom is adjusted by changing the mounting combination of the booms constituting the main boom as described above, the maximum workable radius changes in accordance with the adjustment, so the mounting assembly of the boom to the controller each time. It was necessary to input a matching signal. If a changeover switch (not shown) for the mounting combination signal is provided as a countermeasure, the configuration becomes complicated, and the switching is performed every time the boom is mounted and combined, which is troublesome. In addition, the operator forgot to operate the changeover switch or switched to the wrong position, which was not safe. An object of the present invention is to provide a work attachment mounting combination discriminating apparatus that can solve the above-described problems.

[0005]

According to the present invention, the base end boom and the plurality of relay booms are provided with electric signal circuits extending from the rear end to the front end of each boom, and all the booms are connected. A connector that can be connected at the time of boom mounting combination is also provided near the connecting part of each boom, and the connection relationship of electric signals passing through the connector is converted when the boom mounting combination operation is performed When the boom mounting combination operation is performed, the connector is connected, the detection signal from the electric signal circuit is input to the controller, and the controller sets the boom mounting assembly based on the input signal. The matching state is determined.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing a work attachment 1A provided with a mounting combination discriminating apparatus of the present invention. In the figure, the same reference numerals are given to components using the same components as the conventional technology. 3A is an upper revolving superstructure, 4A is a controller, 5A is a main boom, 9A is a proximal end boom of the main boom 5A, 10A is a distal end boom, 11A is a first intermediate boom, 12A is a second intermediate boom, 20, 21,.
22 and 23 are connectors provided near the connecting portion of each boom, respectively, and 24 and 25 are the controller 4A and
26, 27, 28, 2
9 is an electric signal circuit. In the electric signal circuit, a harness, an optical fiber, or the like is used as a means for transmitting a signal. When the connectors 20 to 23 are disconnected from each other, the male connector (blade portion) and the female connector (blade receiving hole portion) of the connector are disconnected and separated. FIG.
FIG. 3 is a diagram showing a state of the attachment combination determining device when the first relay boom 11A in FIG. 1 is removed. In the figure, 5'A is a main boom, and 21 'and 23' are connectors.

Next, the structure of the mounting combination discriminating apparatus of the present invention will be described with reference to FIGS. In the present invention, the proximal end boom 9A, the first relay boom 11A, and the second relay boom 12A are provided with electric signal circuits 26, 27, 28, respectively, which communicate from the rear end to the front end of each of the booms 9A, 11A, 12A. , All the booms (tip boom 10A)
Are included near the connecting portion of each boom, and the connectors can be connected when the booms are combined. It was set so that the connection relation of passing electric signals could be converted. When the boom mounting combination operation is performed, the connector is connected, a detection signal from the electric signal circuit is input to the controller 4A, and the controller 4A changes the boom mounting combination state based on the input signal. It was configured to determine.

Next, the operation of the mounting combination discriminating apparatus of the present invention will be described. First, as shown in FIG. 1, all the booms 9A, 11A, 12A, and 10A are connected, and all the connectors 21, 22, and 23 (the connector 20 is not connected to the boom mounting combination operation, so that the connection state is maintained. is there)
Is described. When this mounting combination operation is performed, one of the signal circuits communicated from the controller 4A includes the passage 24 (same as the electric signal circuit 24), the connector 20, the passage A of the electric signal circuit 26, and the connector 2
1. Open through the connector 22 through the passage b of the electric signal circuit 27. As a result, the controller 4A determines that the signal input is open. The other signal circuit communicated from the controller 4A is opened at the connector 21 through the passage 25 (same as the electric signal circuit 25), the connector 20, and the passage of the electric signal circuit 26. As a result, the controller 4A determines that the signal input is open. Since both of the signal inputs are open, the controller 4A determines that all the booms 9A, 11A, 12A, and 10A are in the connected state, and calculates the workable radius of the distal end of the arm 7 based on that.

Next, as shown in FIG. 2, the first relay boom 11A
Is removed, ie, each boom 9A, 12A, 10
The case where A is connected and connectors 21 'and 23' are connected will be described. When this combination operation is performed, one signal circuit communicated from the controller 4A is connected to the path 2
4. Via the connector 20 and the path of the electric signal circuit 26,
Opened by connector 21 '. As a result, the controller 4A determines that the signal input is open. The other signal circuit from the controller 4A includes the passage 25, the connector 20, the passage C of the electric signal circuit 26, the connector 2
1 ′, the path of the electric signal circuit 28, the connector 23 ′, the path of the electric signal circuit 29, the connector 23 ′, the path of the electric signal circuit 28, the connector 21 ′, the path of the electric signal circuit 26, the connector 20, It is grounded through the passage. Accordingly, the controller 4A determines that the signal input is grounded. Of the above signal inputs, the electric signal circuit 24 side is open and the electric signal circuit 25 side is grounded, so that the controller 4A has the base end boom 9A and the second relay. Boom 12
A and the distal boom 10 are determined to be connected, and the workable radius of the distal end of the arm 7 is calculated based on the determined state.

FIG. 3 is a chart showing a signal input pattern input to the controller from the electric signal circuit when the connector is connected by performing an operation of attaching and combining the respective booms of the main boom. In FIG. 3, the signal input on the side of the electric signal circuit 24 (shown in FIG.
The signal input on the fifth side is referred to as signal input β. When a disconnection accident occurs in any part of the electric signal circuit, the signal input from the electric signal circuit is determined to be open by the controller 4A. It is determined that many booms are connected, and the safety is more thorough, so that danger due to disconnection can be prevented. Further, in the embodiment of the present invention, the boom has been described as the work attachment mounting combination discriminating apparatus, but the present invention can also be applied to a work attachment (not shown) having a divided arm.

[0011]

In a construction machine equipped with a very long work attachment, the total length of the main boom is adjusted by changing the mounting combination of the boom according to the work situation. Since the maximum workable radius of the tip of the arm changes in accordance with this adjustment, it is necessary to input a boom mounting combination signal to the controller each time. If a changeover switch for an attachment combination signal is provided as a countermeasure against the prior art, the configuration becomes complicated, and the switching is performed every time the attachment combination of the boom is performed, which is troublesome. In addition, the operator forgot to operate the changeover switch or switched to the wrong position, which was not safe. However, according to the present invention, the base end boom and the plurality of relay booms are each provided with an electric signal circuit communicating from the rear end to the front end of each boom, and when all the booms are connected, the mounting combination of the booms is also required. Connectable connectors are provided near the connecting parts of each boom when performing the boom mounting, and when the boom mounting combination operation is performed, the connection relation of the electrical signals passing through the connectors is set so that they can be connected. When the combination operation was performed, a connector was connected, and a detection signal from the electric signal circuit was input to the controller. As a result, one of the electric signal circuits communicating with the single connector or the plurality of connectors is opened or grounded at the connector. The other electric signal circuit is
Opened or grounded at different parts of the connector. Based on the signal input from the electric signal circuit, the controller can determine the mounting / combination state of the boom and calculate the workable radius of the arm tip portion adapted to the combination state. Therefore, in the construction machine equipped with the mounting combination discriminating device of the present invention, when the mounting combination operation of the work attachment is performed, the workable radius of the arm tip can be automatically adjusted to the mounting combination state. It is possible to prevent forgetting to switch or switching to an incorrect position as in the technology and improve safety.

[Brief description of the drawings]

FIG. 1 is a view showing a work attachment provided with a mounting combination discriminating apparatus of the present invention.

FIG. 2 is a diagram showing a state of a mounting combination discriminating apparatus when a first relay boom in FIG. 1 is removed.

FIG. 3 is a table showing a signal input pattern input to a controller from an electric signal circuit when a mounting operation of a boom is performed.

FIG. 4 is a side view of a prior art hydraulic shovel equipped with a very long work attachment.

FIG. 5 is a diagram showing a state where the main boom in FIG. 4 is adjusted to be short.

[Explanation of symbols]

 1, 1A Work attachment 3, 3A Upper revolving structure 5, 5 ', 5A, 5'A Main boom 9, 9A Base end boom 10, 10A Distal boom 11, 11A First splicing boom 12, 12A Second splicing boom 20, 21, 22, 23, 21 ', 23' connector 24, ..., 29 Electric signal circuit

Claims (1)

(57) [Claims] 1. A long boom, an arm, and a work tool are sequentially connected to a front portion of a construction machine to form a super-long work attachment, and each of the work attachments can be bent and rotated in the front-rear direction by a hydraulic cylinder. The main boom is divided into a base boom and a distal boom, and between the base boom and the distal boom, zero or more internal booms can be attached and combined as necessary. An angle detector is provided for each of the base end boom, the distal end boom, and the arm, and a controller is provided for the fuselage. By inputting a detection signal from the angle detector to the controller, a controller is provided based on the detection signal. ,
In a safety device that calculates the horizontal distance from the center of rotation of the fuselage to the tip of the arm and issues an alarm based on the calculation result, the rear end of each boom is connected to the base boom and a plurality of relay booms. An electric signal circuit leading to the tip is provided, and a connector that can be connected when connecting all of the booms and when mounting and combining the booms is provided near the connecting portion of each boom, and the mounting combination of the booms is also provided. It is set so that the connection relation of the electric signal passing through the connector can be converted when the operation is performed, and the connector is connected when the boom mounting combination operation is performed, and the detection signal from the electric signal circuit is input to the controller A controller configured to determine a mounting / combination state of the boom based on the input signal. Mounting combination discriminating apparatus Attachment.