JPH0694463A - Heavy weight synchronization apparatus in underground continuous wall excavator absolute position measuring equipment - Google Patents

Abstract

PURPOSE:To synchronize behavior of a heavy weight with that of an excavator so as to improve reliability of an absolute position measurement value by providing a drum for integrally rotating a pair of wires for a heavy weight and a wire for a depth meter. CONSTITUTION:A pair of wires 13 for a heavy weight for hanging weights 12 and a wire 18 for a depth meter are moved up and down by one winch 1 and the wire 18 and the wires 13 for a heavy weight are connected to the depth meter 20 and an encoder respectively. When an excavator B is lowered, the wire 18 for a depth meter is stretched and a drum 4 is rotated in such manner that tension of the wire 18 for a depth meter is kept constant by a motor 7 and torque control unit 8, namely in accordance with the descent of the excavator B. The wire 13 for a heavy weight wound around the drum 4 is wound off-in synchronization of the descent of theexcavator B and kept at a predetermined position in a sensor cylinder. Thus, a knife-edge position C1 is correctly calculated by means of a personal computer 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention excavates a pair of weights suspended from a reference point on the ground in a trench by weight wires and a depth gauge connected to an excavator by a depth gauge wire. The present invention relates to a weight synchronizing device of an absolute underground wall excavator absolute position measuring device which measures a relative position between an excavator inside and a weight to measure a blade edge position.

[0002]

2. Description of the Related Art An excavator B suspended by a crane D through a wire W as shown in FIG. 4, for example.
Has a cutter C at its lower end so as to excavate the excavation groove A. However, the posture detection device E is provided to detect the posture of the excavator B and perform a correct excavation work. As is well known, this posture detection device E is composed of a pair of weights and a depth gauge, and is adapted to detect the absolute position (position in the X, Y, Z directions). That is, the pair of weights detects the positions in the X and Y directions, and the depth meter detects the position in the Z direction.

According to this conventional technique, two wires for the weight and one wire for measuring the seismic intensity connected to the excavator are required, and a total of three wires are controlled by respective winches. In addition, the position was measured by the encoder (the length of the wire extended).

In the figure, Ca is a cable for power supply and signal lines, and a signal for displacement due to a weight is sent from this cable Ca.

However, in the prior art, the signals are fed back by the three encoders and processed by the computer to control the three winches. If the transmission of the position signal of the weight is unstable, the excavator B The weight has poor followability with respect to the vertical movement of the wire, and especially when the depth is deep, the wire stretches so much that the wire vibrates and the control cannot be performed as expected.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an absolute position measuring device for an underground continuous wall excavator capable of synchronizing the behavior of the weight with the excavator and improving the reliability of the absolute position measurement value. In order to provide a weight tuning device.

[0007]

According to the present invention, a weight suspended from a reference point on the ground in a trench by a pair of weight wires and a depth connected to the excavator by a depth gauge wire. In the absolute continuous wall excavator absolute position measuring device that measures the relative plane position of the excavator and the weight during excavation with a meter, for the pair of weight wires and depth gauge A coaxial drum that winds around the wire and rotates integrally is provided, and a winch that rotates the drum is provided.

[0008]

[Description of Operation and Effects] Therefore, since the pair of weight wires and the depth gauge wire move up and down by the drum that rotates integrally, these three wires can be made to follow the excavator in synchronization. . As a result, no feedback is required and computer processing is easy. Further, even if the wire extends, it is suspended by the integral drum, so that the relative error becomes small. Further, although the reason is not clear, the vibration of the wire was reduced by the experiment, and the measurement accuracy was improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a pair of weight wires 13 for suspending the weight 12 and a depth gauge wire 18 are moved up and down by a winch 1 described later, and the wire 18 is moved to a depth gauge 20. The wires 13 and 13 are connected to the encoders 2 and 2, respectively. These signals, position measurement signals, and inclination measurement signals are connected to the personal computer 22 via the cabtire cable Ca and the transmitter 21.

When the excavator B is lowered during excavation, the depth gauge wire 18 is unwound from the winch 1, and
The weight wire 13 is unwound. Therefore, the weight 1
2 follows the excavator B and is lowered.

2 and 3 show a concrete example of the present invention.

A take-up drum 4 is rotatably provided on a base 3 of the winch 1, and a pair of weight wires 1 are provided.
3 and the wire 18 for the depth gauge are wound around, and the guide roller 4
It is directed upward by being guided by a. This drum 4
Is driven by an electric motor 7 via a belt 5 via a speed reducer 6, and a torque control unit 8 is connected to the speed reducer 6 via a belt 9. The unit 8 controls the rotational torque of the drum 3 due to the tension of the depth gauge wire 18 to be constant by the output torque of the speed reducer 6.

When the excavator B is lowered during excavation, the depth gauge wire 18 is pulled, and the tension of the wire 18 is kept constant on the drum 4 by the electric motor 7 and the torque control unit 8, that is, the excavator B It is rotated according to the descent. Therefore, the weight wire 13 wound around the drum 4 is unwound in synchronization with the downward movement of the excavator B, and is held at a predetermined position of the sensor cylinder 10. As a result, the cutting edge position C1 is accurately calculated and displayed by the personal computer 22.

[0015]

Since the present invention is configured as described above, the behavior of the weight can be synchronized with the excavator and the reliability of position measurement can be improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a front view showing a winch for a weight and a depth gauge.

FIG. 3 is a side view of FIG.

FIG. 4 is a general explanatory view of an excavator.

[Explanation of symbols]

 A ... Excavation groove B ... Excavator C ... Cutter C1 ... Blade position D ... Crane 1 ... Weight / depth gauge winch 3 ... Base 4 ... Drum 4a・ ・ ・ Guide rollers 5, 9 ・ ・ ・ Belt 6 ・ ・ ・ Reducer 7 ・ ・ ・ Electric motor 13 ・ ・ ・ Wire for weight 18 ・ ・ ・ Wire for depth meter 20 ・ ・ ・ Depth meter 21 ・ ・ ・ Transmission Container 22 ... Personal computer

Front page continuation (72) Inventor Hiroshi Ota 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd.

Claims (1)

[Claims] 1. An excavator being excavated by a pair of weights suspended from a ground reference point in a trench by a pair of weight wires and a depth gauge connected to the excavator by a depth gauge wire. In an absolute underground wall excavator absolute position measurement device that measures the relative position between the weight and the weight, the pair of weight wires and depth gauge wires are wound and rotated as a unit. A weight tuning device for an absolute position measuring device for an underground continuous wall excavator, comprising a coaxial drum and a winch for rotating the drum.