JPH03212519A - Back hoe - Google Patents

Abstract

PURPOSE:To simplify the structure for selectively controlling one of a plurality of operation targets by corresponding to input terminals less than the necessary control mode number, and judging the combinations of the input terminals by a control device. CONSTITUTION:A change-over switch 8 with two circuits and six contacts of transmitting means is provided on the swivel base of a back hoe, and a control device 9 has three sets of input terminals. The 6-position switching operations in the change-over switch 8 are corresponded to the combination with the three input terminals of the control device 9 by one to one. When an operator operates a switch knob 10 over six positions of A-F, ON.OFF signal having six kinds of combinations is inputted to the input terminals. In the control device 9, the combinations of three sets of input signals are judged to judge the position to which the switch knob 10 is operated, and on the basis of this judgment, a necessary control mode is set. Hence, the structure for selectively judging one of a plurality of operation targets can be simplified.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a backhoe that can control multiple operation objects (boom up and down movement, arm up and down movement, swivel operation of a swivel base, etc.) using a single operation lever. ) can be selected and operated.

[Conventional technology]

As mentioned above, as a configuration in which multiple operation targets can be selected and operated with one operation lever, for example,
There is one as disclosed in Publication No. 32. In other words, when the operator selects an object to be operated using a changeover switch or the like, a control means such as a microcomputer causes the control object to be linked with the control lever based on a signal from the changeover switch.

[Problem to be solved by the invention]

In the above-mentioned configuration, if there are six types of operation targets, for example, the control means is provided with six sets of input terminals, and detects which input terminal the signal from the changeover switch is input to.
The configuration is such that the operation target selected by the operator is determined.

Therefore, as many input terminals as the number of operation targets are required on the control means side, improvements are needed in terms of simplifying the structure, such as eliminating the number of input terminals and the discrimination circuit for these input terminals. There is room.

An object of the present invention is to simplify the configuration for selecting and determining one of a plurality of operation targets.

[Means to solve the problem]

The present invention resides in the above-described backhoe having the following configuration. In other words, the signal input means includes three sets of input terminals for inputting ON/OFF signals, and the ON/OFF signal input means has a combination of 5 to 8 sets of input terminals to the three sets of input terminals.
A signal transmitting means capable of outputting an OFF signal; and a selecting means for selecting one set of combinations of ON/OFF signals in the signal transmitting means and outputting it to the signal input means; and a control means for linking the operation object and the operation lever corresponding to the ON/OFF signal inputted to the signal input means, so that the operation object can be operated by the operation lever, Its action and effects are as follows.

[For production]

For example, if the signal transmitting means is configured to emit six sets of ON/OFF signals, three sets of input terminals (X),
The ON/OFF signals input to (Y) and (Z) are combined as shown in FIG.

Therefore, by determining the ON/OFF signals inputted to the three sets of input terminals by the operation of the selection means by the operator, it is possible to specify the operation target selected by the operator.

〔Effect of the invention〕

As described above, compared to the conventional structure that has input terminals equal to the number of operation targets to be selected, it is possible to specify the selected operation target using three sets of input terminals, which are fewer than the number of operation targets. We were able to simplify the structure.

Furthermore, combinations of ON/OFF signals of 5 or more and 8 or less can be easily created by using a 2-circuit, 6-contact switch that is commercially available at a low price, which is advantageous in terms of manufacturing cost.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 5, the crawler traveling device (1) is equipped with a dosa device (7) at the front and a swivel table (3) at the top, and a vertical axis (Pl) at the front of the swivel table (3). A backhoe device (2) is attached around the backhoe so as to be able to swing left and right.

The backhoe device (2) includes a boom (4) that can freely swing up and down around a horizontal axis (P2), and an arm (5) that can swing freely around a horizontal axis (P3) at the tip of the boom (4). ),
It is composed of a packet (6) that can be freely swung around the horizontal axis (P,) at the lower end of the arm (5).

As shown in Fig. 5, the left and right armrests of the cockpit (11) provided on the swivel base (3) are boxes (12L).

(12R) is equipped with a left operating lever (LL) and a right operating lever (RL), and by operating the left and right operating levers (LL) and (RL) back and forth, the backhoe device (2 The structure is configured such that each operation of the swivel table (3) and the rotation operation of the swivel table (3) can be performed. In this case, the combination of the linkages between the left and right operating levers (LL), (RL), each operation of the backhoe device (2), and the turning operation of the swivel table (3) is set as shown in FIG. There are six types (I) to (■) (corresponding to operation targets).

Next, the configuration for selecting modes (I) to (Vl) will be explained. As shown in Figure 1, two circuits 6 are mounted on the swivel base (3).
A contact changeover switch (8) (corresponding to signal transmitting means) is provided. On the other hand, the control device (9) (corresponding to control means) has three sets of input terminals (X), (Y), (
Z), output terminals (A+), (B+), input terminal (X), output terminal (CI), (D,), input terminal (Y), and output terminal of the changeover switch (8). (A2), (C2), (E2) and input terminal (Z
) are connected. The selector switch (8) 4 has a 6-position selector (at position (A) in Figure 2, the output terminal (
A switch knob (10) (corresponding to selection means) is provided for ON signal input at position A+) and (A2), output terminal (B, ) at position (B), and ON signal input at position B, etc.

Therefore, when the operator operates the switch knob (10) to switch between the six positions (A) to (F) shown in FIG. ON/OFF signals having six combinations as shown in the figure are input. As a result, the control device (9) receives ON signals input to three sets of input terminals (X), (Y), and (Z).
・Distinguish the combination of OFF signals and turn the switch knob (1
0) is operated to is determined. Based on this judgment, modes (I) to (V) as shown in FIG.
I).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of a backhoe according to the present invention, and FIG. 1 is a circuit diagram showing a connection state between a changeover switch and an input terminal,
Figure 2 is a front view of the selector switch and switch knob, Figure 3
The figure is a table showing the relationship between ON/OFF signals input to the input terminal and modes, FIG. 4 is a table showing the contents of each mode, and FIG. 5 is an overall side view of the backhoe.

Claims (1)

[Claims] Input terminals (X) and (Y) for inputting ON/OFF signals
, (Z), and is capable of outputting ON/OFF signals having combinations of 5 or more and 8 or less to the three sets of input terminals (X), (Y), and (Z). Signal transmitting means (8) and ON/O in the signal transmitting means (8)
comprising selection means (10) for selecting one set of the combinations of FF signals and outputting it to the signal input means;
Among the plurality of operation objects (I), the operation object (I) corresponding to the ON/OFF signal input to the signal input means is
)... and operating levers (LL), (RL), and a control means (9) that allows the operating target (I) to be operated by the operating levers (LL), (RL). A backhoe.