JP7467809B2 - Height safety device for earthmoving machines - Google Patents

Description

The present invention relates to a height safety device for civil engineering machinery. More specifically, the present invention relates to a height safety device for civil engineering machinery that prevents a slide mounted on the leader of a drilling machine, ground improvement machine, or other civil engineering machinery from interfering with an obstacle when the slide extends upward.

Crane trucks, high-altitude work vehicles, and other machines equipped with a boom, leader, and arm will encounter interference during construction or movement if there is an obstacle on the top. Patent Document 1 discloses a crane boom height limit warning device. It measures the inclination and extension of the crane boom and issues a warning when a stored height limit value is reached. Patent Document 2 discloses a work platform regulation device for a high-altitude work vehicle that calculates the position of the work platform from the amount of boom extension, boom hoisting angle, and vehicle body inclination angle, and prevents the lifting height of the work platform from being exceeded.

The height limit or warning devices described in the above-mentioned patent documents are all intended for cranes and high-altitude work vehicles that swing their booms during operation. In other words, they are not intended for civil engineering machines that have earth augers, excavation heads, mixing blades, prefabricated piles, etc. that move up and down on a vertically fixed leader, such as drilling machines and ground improvement machines.

Japanese Utility Model Application Publication No. 63-161294 Japanese Utility Model Application Publication No. 6-63599

In view of the above background, the present invention achieves the following objects.
The object of the present invention is to provide a height safety device for civil engineering machinery, such as a drilling machine or a ground improvement machine, which has a slide that can move up and down on a vertically fixed leader, and which can limit the slide height or issue an alarm.
Another object of the present invention is to provide a height safety device for civil engineering machinery, such as a drilling machine or ground improvement machine, which is equipped with a slide that can move up and down on a vertically fixed leader, and which can arbitrarily change the slide height limit or alarm position.

The above problems are solved by the following means.
That is, the height safety device for a civil engineering machine according to the present invention 1 is
A reader that can be fixed vertically during construction;
a slide movably provided on the reader;
a slide driving means for driving the slide movably on the reader;
a rotary head that is driven to be movable on the slide and includes a tool rotating means that rotates a tool provided at a lower end of the rotary head;
a rotary head driving means for driving the rotary head so that the rotary head is movable on the slide,
a slide position detection means for detecting an absolute position of the slide on the reader;
A height limit setting means for setting a height limit position of the slide in advance;
A display means for displaying the height of the slide ,
The tool is one selected from an earth auger, a drilling head, a mixing blade, and a precast pile;
the slide position detection means is a wire-type absolute encoder that measures by stretching a wire between the reader and the slide to detect the absolute position of the slide,
the height limit setting means sets a height position of the top end of the slide,
The slide driving means is a chain and a hydraulic motor or a hydraulic cylinder,
When the slide reaches the set height position, the pressure oil to the hydraulic motor or hydraulic cylinder is cut off by an electromagnetic valve.

The height safety device for civil engineering machinery of invention 2 is the same as in invention 1, in that the display means displays the vertical height from the ground surface to the top end of the slide, corrected by the inclination angle detected by an inclinometer placed on the reader or slide.

The height safety device for a civil engineering machine of Invention 3 is characterized in that, in Invention 1 or 2, the height limit setting means presses a setting button on a touch panel when the height position of the uppermost end of the slide is at a predetermined height limit position, thereby setting the height limit position of the slide to a predetermined set height.

The height safety device for civil engineering machinery of the present invention allows the height limit position of the top end of the slide to be set as desired, and the height limit position can be changed as desired. Therefore, at construction sites where there is a height limit on the top of the civil engineering machinery, there is no need to monitor the top of the civil engineering machinery, improving the workability of the civil engineering machinery.

FIG. 1 is an overall front view showing a civil engineering machine according to an embodiment of the present invention. FIG. 2 is an enlarged front view showing a slide position detection means for detecting the absolute position of the slide in FIG. FIG. 3 is a control block diagram of a height safety device for a civil engineering machine according to an embodiment of the present invention. FIG. 4 is an overall front view showing a civil engineering machine in which the height limiting position of the slide is set. FIG. 5 is a flow chart showing the operation of the height safety device for a civil engineering machine according to an embodiment of the present invention.

The following describes an embodiment of the present invention with reference to the drawings. FIG. 1 is an overall front view of a civil engineering machine according to an embodiment of the present invention, and FIG. 2 is an enlarged front view of a slide position detection means for detecting the absolute position of the slide in FIG. 1. As shown in FIG. 1, the civil engineering machine 1 according to an embodiment of the present invention has a vehicle body 12 that travels by a crawler device 11, and a columnar leader 13 that is attached to the vehicle body 12 so that it can stand up and tilt. A columnar slide 2 is movably attached to the leader 13, and is raised and lowered by a slide drive hydraulic motor 14 at the upper end of the leader 13. The slide 2 is raised and lowered by a sprocket and chain (not shown) connected to the slide drive hydraulic motor 14. A rotating head 21 is movably attached to the slide 2, and is raised and lowered by a rotating head drive hydraulic motor 22 at the upper end of the slide 2. A tool 24 is attached to a chuck 23 at the lower end of the rotating head 21, and the tool 24 is rotated and driven by a tool rotation motor 25. The tool 24 may be an earth auger, a drilling head, an agitator blade, a chuck of a pile driver, a prefabricated pile held by a jig, etc. Although prefabricated piles are not generally considered to be tools, they are included in the present invention.

As shown in Figures 1 and 2, a wire-type absolute encoder 3 is attached to the top surface of the slide drive hydraulic motor 14. The wire-type absolute encoder 3 has a structure in which a wire box is attached to a rotary encoder, and outputs an absolute signal according to the length of the wire pulled out. A wire 31 is stretched between the wire-type absolute encoder 3 and the housing of the rotary head drive hydraulic motor 22, and the absolute position of the slide 2 can be detected by the wire-type absolute encoder 3.

Figure 3 is a control block of a height safety device for a civil engineering machine according to an embodiment of the present invention. As shown in Figure 3, the height limit assist device 4 receives an absolute position signal of the slide 2 from the wire-type absolute encoder 3. The height limit assist device 4 is equipped with a height limit ON/OFF switch for turning on/off the height limit function of the top end of the slide 2. The height limit assist device 4 operates a solenoid valve 16 to cut off the pressure oil supplied from the hydraulic pump 15 to the slide drive hydraulic motor 14, and stops the ascent of the slide 2 when the slide 2 reaches the set height position. The height limit assist device 4 is connected to a management device 5. The management device 5 is equipped with a touch panel 51, and the height limit position of the top end of the slide 2 can be set using the setting button 52 on the touch panel 51. The management device 5 is connected to a leader inclinometer 6 that detects the inclination angle of the leader 13.

Figure 4 is an overall front view showing the civil engineering machine 1 in which the height limit position of the slide 2 is set on the touch panel 51. For example, when the limit position of the slide shown in Figure 4 is 2000 mm, pressing the setting button 52 of the touch panel 51 of Figure 3 sets the limit position of the slide to 2000 mm on the touch panel 51. Also, the limit height of the slide in Figure 4 (the set height limit position of the top end of the slide 2) is set to 8.13 m in this example, with the slide 2 being vertical, as shown in Figure 3. On the touch panel 51 in Figure 3, the slide maximum stroke, the current position of the slide, the remaining slide stroke, the vertical angle of the slide (the inclination angle of the reader 13 of the reader inclinometer 6), for example, a value corrected (cos 5 °) by the vertical angle of the slide of 95.0 degrees is displayed as the actual limit vertical height of the top end of the slide (not the apparent, but the actual vertical height of 8.10 m), and also the actual current vertical height of the slide (current vertical height of 7.11 m) is corrected (cos 5 °). The leader inclinometer 6 was placed on the leader 13, but the inclinometer may also be placed on the slide 2.

Figure 5 is a flow chart showing the operation of the height safety device of the civil engineering machine 1 according to an embodiment of the present invention. When the engine of the civil engineering machine 1 is started in step S10, the height limit assist device 4 is started. In step S20, the management device 5 is started. In step S30, when the height position of the top end of the slide 2 is at a predetermined height limit position, the setting button 52 on the touch panel 51 is pressed to set the height limit position of the slide 2 to the predetermined set height. The height limit ON/OFF switch of the height limit assist device 4 is turned ON to turn ON the height limit function of the top end of the slide 2.

In step S40, the slide 2 rises while the civil engineering machine 1 is operating, and if the height limit ON/OFF switch is ON in step S50, the current position of the slide 2 is read as an absolute position signal from the wire-type absolute encoder 3 in step S60. If the current position of the slide 2 is equal to or higher than the limit position of the slide 2 in step S70, the height limit assist device 4 operates the solenoid valve 16 to cut off the pressure oil supplied from the hydraulic pump 15 to the slide drive hydraulic motor 14, stopping the rise of the slide 2, as shown in step S80. Although not shown, it is possible to display on the touch panel 51 that the height of the slide 2 is being limited. If the current position of the slide 2 is equal to or lower than the limit position of the slide 2 in step S70, the rise of the slide 2 can be continued, as shown in step S90.

The height safety device for civil engineering machines according to the embodiment of the present invention allows the height limit position of the top end of the slide to be set as desired, and the height limit position can be changed as desired. Therefore, at a construction site where there is a height limit on the upper part of the civil engineering machine, it is no longer necessary to monitor the upper part of the civil engineering machine, improving the workability of the civil engineering machine.
[Other embodiments]
The slide 2 in the above-mentioned embodiment is raised and lowered by the slide drive hydraulic motor 14, sprockets and chains (not shown), but the present invention is also applicable to a slide that is raised and lowered by a hydraulic cylinder (not shown). When the operation of the hydraulic cylinder is to be stopped, the supply of pressure oil from the hydraulic pump 15 is cut off by the solenoid valve 16 to stop the operation.

1...Earth construction machine 11...Crawler device 12...Vehicle body 13...Reader 14...Slide drive hydraulic motor 15...Hydraulic pump 16...Solenoid valve 2...Slide 21...Rotary head 22...Rotary head drive hydraulic motor 23...Chuck 24...Tool 25...Tool rotation motor 3...Wire type absolute encoder 31...Wire 4...Height limiting assist device 5...Management device 51...Touch panel 52...Setting button 6...Reader inclinometer

Claims (3)

A reader that can be fixed vertically during construction;
a slide movably provided on the reader;
a slide driving means for driving the slide movably on the reader;
a rotary head that is driven to be movable on the slide and includes a tool rotating means that rotates a tool provided at a lower end of the rotary head;
a rotary head driving means for driving the rotary head so that the rotary head is movable on the slide,
a slide position detection means for detecting an absolute position of the slide on the reader;
A height limit setting means for setting a height limit position of the slide in advance;
A display means for displaying the height of the slide ,
The tool is one selected from an earth auger, a drilling head, a mixing blade, and a precast pile;
the slide position detection means is a wire-type absolute encoder that measures by stretching a wire between the reader and the slide to detect the absolute position of the slide,
the height limit setting means sets a height position of the top end of the slide,
The slide driving means is a chain and a hydraulic motor or a hydraulic cylinder,
a hydraulic motor or hydraulic cylinder that is connected to the slide and that is connected to the hydraulic motor or hydraulic cylinder, and that is connected to the hydraulic cylinder and that is connected to the hydraulic motor or hydraulic cylinder. 2. The height safety device for a civil engineering machine according to claim 1 ,
A height safety device for a civil engineering machine, characterized in that the display means displays the vertical height from the ground surface to the top end of the slide corrected by an inclination angle detected by an inclinometer placed on the reader or the slide. The height safety device for a civil engineering machine according to claim 1 or 2,
The height limit setting means sets the height limit position of the slide to a predetermined set height by pressing a setting button on a touch panel when the height position of the top end of the slide is at a predetermined height limit position.
A height safety device for civil engineering machinery.

Images