JPH09279639A - Arm-type work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency by providing an operating radius detection means which detects the operating radius of a work attachment and an operating radius indication means which indicates the detected operating radius near a mass table. SOLUTION: Operating radius detecting means 23, 24, 25 which detect the operating radius of a work attachment 16, and an operating radius indicating means 40B which indicates the detected operating radius R near a mass table 40, are arranged. Then the mass table 40 is displayed in a position easily seen by an operator in a cab 26, allowing him to carry out work in a safe zone while confirming the mass of piles which can be handled, operating radius, and an actual operating radius. Then even if the operating radius is changed, the operator can know the actual operating radius while operating a work machine. Therefore, there is no need for measuring an operating radius outside the work machine, and it is also possible to know the actual operating radius, confirm the mass of piles which can be handled from the mass table 40A, and carry out work efficiently without stopping work temporarily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm type working machine capable of performing punching work and pile driving work.

[0002]

2. Description of the Related Art An arm type working machine, which is equipped with a work attachment at the tip of the arm and performs various works such as civil engineering work, has been known in the past. An example of this arm type working machine is shown in FIG. ing. The arm type working machine has an upper swing body 2 on a lower traveling body 1 so as to be swingable around a vertical axis X. The upper swing body 2 has a first arm 3 and a second arm 4
The third arm 5 and the extension arm 6 are sequentially connected by connecting pins 7 to 10 so as to be rotatable in the elevation direction. First arm 3, second arm 4 and third arm 5
And the extension arms 6 are connected to the hydraulic cylinder devices 11 to 14, respectively.
Drives the arms 3 to 6 to rotate in the elevation direction.

A ground auger attachment 16 is removably suspended and attached to the tip of the extension arm 6 by a mounting pin 15. The auger screw 17 is hung and attached to the earth auger attachment 16.
The screw 17 is rotationally driven by the earth auger attachment 16 to drill vertical pile holes.

Further, in the operator's cab 26, depending on the type of attachment to be attached to the tip of the extension arm 6, the stability of the entire working machine is determined by the mass of the screw or pile (concrete pile, sheet pile, H-shaped steel, etc.) to be handled. A tabulated mass table is provided. As shown in FIG. 9, this mass table shows the relationship between the name of the attachment, the mass of the attachment, the working radius, and the length and mass of the screw or pile that can be handled according to the working radius. It is a thing. This mass table is provided at a position that is easy for the operator who operates the work machine to see, and the operator can check the mass and working radius of the piles that can be handled while looking at this mass table, and the range where safe work can be performed. I try to do the work inside. This mass table is used as follows.

For example, in the case of using a hydraulic auger, first, it is determined from the mass of the hydraulic auger to be used which stage of the "hydraulic auger" in the table shown in FIG. Then, the worker measures the position at which a hole is drilled from the working machine, that is, the working radius to the tip of the auger with a tape measure or the like. For example, the mass of the hydraulic auger used is 1200 kg,
If the working radius is 3.65 m, it can be seen from the mass table that the maximum load that can be lifted is 2950 kg.

Further, when the screw is used, the diameter of the screw is 250 to 650 mm, and the depth and diameter of the hole are known from the construction plan. Further, since the operator knows the mass of the screw, for example, when three screws with a length of 1 m and a diameter of 250 mm are connected and used, how many screws can be connected after this, The operator can recognize by the mass table.

Further, when using a high frequency pile punching machine or an ultra high frequency pile punching machine, the mass of the pile punching machine to be used is known from the mass table shown in FIG. 9, and the mass of the pile is calculated from the length of the pile to be handled. know. Thus, the range of work radius where work can be performed can be known from the table. Then, the worker measures the actual work radius, determines whether or not it is within the workable range, and performs the work within the workable range.

On the other hand, the construction conditions may be changed according to the construction state at the construction site for the construction plan. In particular, in the case of slightly changing the working position, in the arm type working machine, the working radius can be easily changed by operating the arm to perform the construction.

[0009]

However, when the working radius is changed, in order for the operator to know the mass that can be handled according to the changed working radius, the working radius is measured by an operator working outside the working machine. Since there was no choice but to ask, when the working radius was changed, it was necessary to stop the work once and measure the working radius, resulting in extremely poor working efficiency. For this reason, it is conceivable to provide a means for measuring the working radius to display the working radius in the cab.However, if the means for displaying the working radius and the mass table are provided separately, It is difficult to check the table.

An object of the present invention is to provide an arm type working machine in which the operator can easily confirm the working radius and the mass table.

[0011]

FIG. 1 shows an embodiment of the present invention.
Describing in association with FIG. 3, according to the present invention, the working attachment 16 is attached to the tip of the arm, and the cab 26
Type of work attachment 16, work radius of work attachment 16 and work attachment 1
6 is applied to an arm type working machine equipped with a mass table 40 showing the relationship of the mass of the object 17 that can be handled, and working radius detecting means 23, 24, 25, 30 for detecting the working radius of the working attachment 16. , Working radius detection means 23, 2
Table 4 shows the working radius R detected by 4, 25, 30
The above-described object is achieved by further including working radius display means 40B for displaying near 0. According to the invention of claim 2, the mass table 40 and the working radius display means 40B are provided on the same member.

Here, the object differs depending on the type of work attachment. When the work attachment is a hydraulic auger, the object is a pile, sheet pile or H-shaped steel suspended by the hydraulic auger. In the case of a high frequency pile punching machine, the object is a pile.

According to the present invention, the working radius detecting means 23,
Since the work radius R detected by 24, 25, 30 is displayed in the vicinity of the mass table 40 by the work radius display means 40B, the operator can simultaneously recognize the mass table 40 and the work radius.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a mass table used for an arm type working machine according to the present invention, and FIG. 2 is a diagram showing an embodiment of an arm type working machine according to the present invention. In the present embodiment, parts having the same configurations as those of the above-described conventional example are denoted by the same reference numerals as those of the above-described conventional example, and description thereof will be omitted.

As shown in FIG. 2, angle sensors 23 to 25, which form a part of the working radius detector, are provided at the center of rotation of each of the first arm 3 to the third arm 5. Angle sensor 2
3 detects the tilt angle θ1 of the first arm 3 with respect to the horizontal plane, the angle sensor 24 detects the relative angle θ2 between the first arm 3 and the second arm 4, and the angle sensor 25 detects the second arm 4 and the third arm. The relative angle θ3 with 5 is detected.

FIG. 3 is a diagram showing an arithmetic circuit which constitutes a working radius detector incorporated in the arm type working machine according to the present invention. As shown in FIG. 3, the arithmetic circuit 30 is connected to the angle sensors 23 to 25 described above, and further, the mass table 4 described later.
It is also connected to the working radius indicator 40B of 0.

The arithmetic circuit 30 includes the angle sensors 23 to 25.
The angle information signal is input from, the working radius R of the connecting pin 15 is sequentially calculated according to the following formula (1), and the calculated working radius is displayed on the working radius indicator 40B provided in the mass table 40. Working radius R = Lo + L1 · cos θ1 + L2 · cos (θ1−θ2) + L3 · cos (θ1−θ2−θ3) (1) where Lo is the distance between the turning center X and the turning center of the first arm 3, L1 to L3 Respectively, as shown in FIG.
The arm lengths of the first arm 3 to the third arm 5, which are invariable and known.

As shown in FIG. 1, a mass table 40 is a table showing the name of the attachment, the mass of the attachment, the working radius, and the relationship between the length and the mass of the screw or pile that can be handled according to the working radius. It is provided with a section 40A and a work radius indicator 40B for displaying the work radius calculated by the arithmetic circuit 30. This mass chart shows the driver's seat 26
The operator is provided at a position where it is easy to see, and while checking the mass table 40, the operator can confirm the mass and working radius of the piles that can be handled, and the actual working radius, and within the range where safe work can be performed. Do the work.

Therefore, even if the working radius is changed, the operator can know the actual working radius while operating the working machine. You don't have to measure. Therefore, without actually stopping the work, the actual work radius can be known and the mass of the handleable pile or the like can be recognized by the front portion 40A, so that the work can be performed efficiently. In addition, since the work radius indicator 40B is provided on the mass table 40, the operator can easily check the surface portion 40A of the mass table 40 and the work radius indicator 40B at the same time.

In the above-mentioned embodiment, the one shown in FIG. 1 is used as the front portion 40A of the mass table 40. For example, as shown in FIG. 5, depending on the type of attachment used. The lit lamps 41A to 41D may be provided on the left outer side of the front portion 40A. These lamps 41A to 41D are turned on according to the type of attachment by the operation of the operator, and by providing such lamps 41A to 41D, the operator is currently using the mass table 40 at a glance. The type of attachment can be easily recognized.

Further, as shown in FIG. 6, in addition to the lamps 41A to 41D shown in FIG. 5, a mass such as a pile that can be handled according to the working radius is selected on the outer right side of the front portion 40A of the mass table 40. Lighted lamps 42A to 42D, 43A to 43
You may make it provide D, 44A-44D, 45A-45D. These lamps 42A to 42D, 43A to 43
FIG. 7 shows a circuit diagram of a mass table using D, 44A to 44D and 45A to 45D. As shown in FIG. 7, four selection buttons 50A to 50D for selecting the type of attachment to be used in FIG. 3 are connected to the arithmetic circuit 30 in FIG. 3, and each selection button 50A to 50D has a selection button for each attachment. Lamps 42A-42 according to the work radius for each type
D, 43A to 43D, 44A to 44D, 45A to 45D
Lighting circuits 51A to 51D for lighting are connected. Since the detailed configurations of the lighting circuits 51A to 51D are common to all the circuits, here, the lighting circuit 51A is used.
Only the other circuits 51B to 51D will be described in detail.

As shown in FIG. 7, the lighting circuit 51A includes:
Comparator 52 connected to each of the lamps 42A to 42D
A to 52D are connected. The comparators 52A to 52
In D, the signal representing the working radius calculated by the arithmetic circuit 30 is input when the selection button 50A is closed, and the input signal and the respective comparators 52A to 5A-5.
A comparison is made with a predetermined working radius in 2D. Here, the working radii to be compared by the respective comparators 52A to 52D are 3.65 m and 6.0, respectively, corresponding to the mass table.
m, 8.0 m and 9.0 m. The working radius input from the arithmetic circuit 30 and the comparators 52A to 52A
Depending on the result of the comparison with the predetermined working radius of D, the lamp 4
One of 2A to 42D is turned on. For example, in the case of using the hydraulic auger of the first stage in the table, the arithmetic circuit 3
When the work radius input from 0 is 3.65 m, the lamp 42A is turned on, so the operator has 2950 kg.
At a glance you can see that you can handle piles of up to mass.

In the present invention, the work radius display means is displayed near the mass table. However, "display near" means that the work radius is displayed on the mass table as in the above embodiment. It means that the mass table and the working radius display means are arranged adjacent to each other so that the mass table and the working radius can be recognized at a glance, such as those provided with means. More specifically, it is preferable that they are arranged side by side on one side of an operating lever for operating the crane in the driver's seat.

In the correspondence between the above embodiment and the claims, the angle sensors 23, 24, 25 and the arithmetic circuit 30 serve as working radius detecting means, and the working radius indicator 40 of the mass table 40.
B constitutes working radius display means.

[0026]

As described above in detail, according to the arm type working machine of the present invention, the current working radius is displayed in the vicinity of the mass table, so that the operator can display both the mass table and the working radius. Since it can be recognized at a glance and the work radius can be recognized without stopping the work,
Work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a mass table used in an arm type working machine according to the present invention.

FIG. 2 is an overall view showing an arm type working machine according to the present invention.

FIG. 3 is a block diagram showing a control system of working radius detection means used in the arm type working machine according to the present invention.

FIG. 4 is an explanatory diagram showing values of each part for calculating a working radius during crane work.

FIG. 5 is a diagram showing another embodiment of the mass table.

FIG. 6 is a diagram showing still another embodiment of the mass table.

7 is a circuit diagram of the embodiment shown in FIG.

FIG. 8 is an overall view showing a general arm type working machine.

FIG. 9 is a diagram showing a configuration of a conventional mass table.

[Explanation of symbols]

 1 Lower Traveling Body 2 Upper Revolving Body 3 First Arm 4 Second Arm 5 Third Arm 6 Extension Arm 11-14 Hydraulic Cylinder Device 16 Earth Auger Attachment 19 Crane Hook 20 Hook Storage Bracket 21 Hook Storage Pin 23-25 Angle Sensor 30 Calculation circuit 40 Mass table 40A Surface section 40B Working radius indicator

Claims (2)

[Claims] 1. A work attachment is attached to a tip of an arm, and represents a relationship among a type of the work attachment, a work radius of the work attachment, and a mass of an object that the work attachment can handle in a driver's cab. In an arm type working machine equipped with a mass table, a working radius detecting means for detecting a working radius of the working attachment, and a working radius display for displaying the working radius detected by the working radius detecting means in the vicinity of the mass table. An arm-type working machine further comprising means. 2. The arm type working machine according to claim 1, wherein the mass table and the working radius display means are provided on the same member.