JPH0728237Y2 - Inclination measuring device for excavation rotary axis - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to an inclination measuring device capable of specifying the direction of inclination of a rotation axis when excavating the ground using an earth auger or the like.

《Prior art》 For example, when drilling the ground while rotating the rotating shaft along the rotating shaft direction, such as an earth auger, work on the hole accuracy such as the verticality of the drilling hole caused by the drilling. As a means for confirming the inside, a detecting means using an inclinometer has been conventionally known.

In general, most of the inclinometers are provided on a reader that supports a rotating shaft, but in the case of such an arrangement,
The detection accuracy was low due to the bending of the rotating shaft, and it could not be applied to the construction method where the verticality between the water blocking walls is important, especially when constructing a columnar water blocking wall.

Therefore, recently, a method has been proposed in which an inclinometer is provided inside the rotary shaft to directly detect the degree of tilt of the rotary shaft.

According to this method, the detected value of the inclinometer can be converted into the degree of inclination of the rotary shaft as it is, and a highly accurate detected value can be obtained.

<Problems to be solved by the device> However, in this method, since the detection value is continuously taken in while the rotating shaft is rotating, the position in the circumferential direction of the rotating shaft is It was not known whether the inclination was the corresponding degree, and the directionality of the inclination of the rotation axis could not be specified.

Further, in order to forcefully specify the directionality, the rotation of the rotary shaft must be temporarily stopped, which causes a decrease in excavation work efficiency.

The present invention solves the above problem, and an object thereof is to provide an inclination measuring device for an excavating rotary shaft, which can identify the directionality of the slope even while the rotary shaft is rotating. And

<Means for Solving the Problem> In order to achieve the above-mentioned object, the present invention provides means for detecting the inclination of the rotary shaft which is arranged at the axial center of the rotary shaft for excavation, and for each rotation of the rotary shaft. It is provided with means for detecting a reference position in the circumferential direction and generating a signal, and data fetching means for fetching the tilt data obtained by the detecting means every time the reference position signal is generated.

<< Operation >> According to the above configuration, when the rotary shaft rotates, a signal is generated at the reference position thereof, and the tilt data obtained by the tilt detecting means is fetched each time the signal is generated, and the reference in the circumferential direction of the rotary shaft is obtained. It can be read as the tilt at the position.

<< Embodiment >> An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an earth auger machine to which the present invention is applied.

In the figure, 1 is a base machine, 2 is a vertical leader standing in front of the base machine 1, and 3 is a vertical leader 2.
It is an auger machine that can be moved up and down along the vertical direction.

The auger machine 3 includes a head 4 that is vertically movable from the top of the vertical leader 2, a hollow guide sleeve 5 that is vertically provided under the head 4, and a central axis of the guide sleeve 5. An auger 6 is rotatably connected to the inside of the head 4 and projects below the guide sleeve 5.

Then, in this auger machine 3, a cement milk injection hose 8 made by an injection plant 7 and an auger 6 having one end connected to a control panel 9 arranged in the base machine 1.
A power cable 9a for driving the rotation of the vehicle and a cable 10 for taking in inclination data from an inclinometer, which will be described later, are connected, and a rotary encoder-type depth gauge for detecting the depth according to the up-and-down movement of the head 4. 11 are connected.

Then, the data from the depth meter 11, the inclinometer, etc., and the flow meter 12 provided in the middle of the piping of the injection hose 8 are taken into the computer system 14 arranged at the rear part of the base machine 1, and here, each data is Are recorded, operation instructions, and alarm output is generated.

The auger 6 is an internal hollow tube having a tip bit 6a as shown in FIG. 2, and an upper portion of the auger 6 is attached to a pinion 15a of a hydraulic drive motor 15 arranged inside the head 4 and a gear 16.
Is rotatably connected via. Also, this auger 6
A hollow inner tube 17 is similarly fixedly arranged on the central axis of the inside of. The inclinometer 18 is arranged at the center position inside the tip of the inner pipe 17.

This inclinometer 18 has a line segment X,
The inclination of the center of the Y-axis with respect to the two directions is detected, and this detection data is drawn into the inside of the head 4 through the slip ring 20 arranged at the upper end of the inner tube 17 through the cable 19.

Further, the inner pipe 17 is in a bare state below the slip ring 20, and a reflection plate 21 for reference positioning is fixed to a part of the inner pipe 17 in the circumferential direction.

Further, an optical sensor 22 is fixedly arranged facing the reflection plate 21, and a rotational position of the reflection plate 21 according to the rotation of the inner tube 17 is detected and a signal is generated.

This optical sensor 22 has a function of outputting a signal to a switch 23 connected to the output end of the inclinometer 18 to start the switch 23, and the optical sensor 22 receives the reflected light from the reflection plate 21 and turns on. By this, the switch 23 is closed, and the data obtained by the inclinometer 18 is sent to the computer system 14 side, where it is read as the degree of inclination in the X, Y-axis direction with respect to the reference position, and displayed on the display. When the writing operation to the recorder is automatically performed, and when the detected inclination degree exceeds a predetermined value by comparison with the set inclination, etc., in which direction the auger machine 3 should be inclined and corrected. Command signal is output.

As the means for detecting the reference position of the inner tube 17, in addition to the combination of the reflection plate 21 and the optical sensor 22, a combination of a magnet and a magnetic sensor, or a contact type sensor such as a limit switch may be used. it can.

<Effects of the Invention> As described in detail with reference to the embodiments above, in the inclination measuring device for the excavating rotary shaft according to the present invention, when the rotary shaft rotates, a signal is generated at the reference position thereof, and the tilt detecting means detects the signal. The obtained inclination data is taken in each time the signal is generated and can be read as the inclination at the reference position in the circumferential direction of the rotary shaft. Therefore, according to the present invention, it is possible to specify the direction of the inclination even while the rotary shaft is rotating, and it is not necessary to interrupt the rotation work to specify the position as in the conventional case. It is possible to prevent a decrease in work efficiency.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the overall structure of an earth auger machine according to the present invention, and FIG. 2 is an enlarged view of a main part. 3 …… Auger machine 6 …… Auger (rotating shaft) 17 …… Inner cylinder 18 …… Inclinometer (tilt detection means) 21 …… Reflector 22 …… Optical sensor (signal generation means) 23 …… Switch (take-in means) )

Claims (1)

[Scope of utility model registration request] 1. A means for detecting the inclination of the rotary shaft, which is arranged at the center of the rotary shaft for excavation, and means for detecting a reference position in the circumferential direction for each rotation of the rotary shaft to generate a signal. An inclination measuring device for an excavating rotary shaft, comprising: data acquisition means for acquiring the inclination data obtained by the detection means every time the reference position signal is generated.