JP2542548Y2 - Shield excavator direction detection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavator direction detecting device for detecting the direction of a shield excavator that assembles segments and excavates while taking a reaction force.

[0002]

2. Description of the Related Art Generally, in controlling the direction of excavation of a shield excavator, the direction of the shield excavator is measured at regular intervals or in real time. As a direction detecting device for that purpose, a device that detects a direction (direction) of the shield excavator by a gyro compass mounted inside the shield excavator,
As shown in FIG. 4, two light receiving plates 2 and 3 are arranged in front and rear in a box 1, and a spot type laser beam 4 is transmitted therethrough to thereby transmit coordinate positions a and b of the two sheets.
There is a so-called optical target in which the direction is detected by calculating the inclination of the laser beam 4 with respect to the direction.

[0003]

Among the above-mentioned conventional devices, a device using a gyro compass has a problem that a static error is large, and a conventional optical target has a fixed width. Since two light receiving plates are used, it is necessary to increase the distance between the light receiving plates in order to increase the accuracy, and when measuring a large inclination, a large area light receiving plate is required, occupying a large space There was a problem that would be.

In view of these problems, the present invention makes it possible to measure a large horizontal tilt with high accuracy and easily even in a small space, and to measure the horizontal tilt based on the absolute coordinates of a shield excavator. It is an object of the present invention to provide a shielded excavator direction detecting device that enables the above.

[0005]

The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
A pair of optical scales installed in the same direction in a front and rear two-row arrangement at a predetermined position in the shield excavator body, and a laser beam is directed from the predetermined position behind the shield excavator toward the two optical scales. The present invention is directed to a shielded excavator direction detecting device which is similar to a revolving laser light emitting device which emits light while revolving with respect to the scale.

[0006]

The optical scale in the device of the present invention has an elongated light receiving section, and when any of the positions is irradiated with laser light, the position is detected and output as an electric signal. The angle of the shield excavator is detected from each irradiation position by being fixed to a predetermined position of the shield excavator determined in advance and being irradiated with the turning laser beam.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In the figure, reference numeral 10 denotes a shield excavator. Inside the shield excavator 10, a pair of optical scales 11a and 11b are fixed in a horizontal direction, parallel to each other, and with a step in front and rear. Each of the optical scales 11a and 11b has a linear light receiving section 12 on the front surface as shown in FIG.
Is irradiated, the position is detected and output as an electric signal. Of the two optical scales, the one provided with a distance measuring light reflecting prism (not shown) is used as the optical scale 11a on the rear end side of the shield excavator.

Behind the shield excavator 10, a revolving laser light emitting device 13 is installed on the ceiling of the tunnel. The laser light emitting device 13 emits a laser beam 14 while revolving in a vertical direction, thereby providing both optical scales 11a and 11b. Has been irradiated. The laser light emitting device 13 has a horizontally rotating swivel 13a, and the irradiation angle can be adjusted by remote control. The horizontal angle of the laser light 14 can be adjusted by a rotation angle detector of the swivel 13a. It is output.

The turntable 13a is provided with a lightwave distance meter 15, and the distance is measured by the lightwave distance meter 15 and the reflecting prism of the optical scale 11a.

As shown in FIG. 2, the shield excavator direction detecting device having such a configuration emits vertical turning laser light 14 in a predetermined horizontal direction from a laser light emitting device 13 so that both optical scales 11a, 11b, the irradiation position data of both scales, the horizontal light emission angle data of the laser light emitting device 13, and the distance data to the optical scale 11a by the lightwave distance meter 15 provided in the laser light emitting device 13. Calculate the horizontal orientation of the shield excavator.

In the above-described embodiment, the detection of the angle in the horizontal direction has been described. However, the detection of the angle in the vertical direction can be similarly performed by changing the direction of the above-described device by 90 °.

[0013]

As described above, the shield excavator direction detecting device of the present invention uses two elongated optical scales and a rotary laser light emitter, so that a long optical scale is used. Even though it does not occupy a large space, a large horizontal inclination can be detected with high accuracy. In addition, when the laser light is deviated by the optical scale by placing the vertical rotation type laser emitter on the swivel and enabling horizontal rotation, the laser light is always applied to the optical scale by remote control. And has effects such as good operability.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a perspective view of an optical scale used in the present invention.

FIG. 4 is a perspective view schematically showing a conventional optical target.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shield excavator 11a, 11b Optical scale 12 Light receiving part 13 Laser light emitting device 13a Swivel table 14 Laser light 15 Light wave distance meter

 ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP 5-321577 (JP, A) JP 5-59884 (JP, A) JP 5-223569 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of optical scales installed in a predetermined position in a shield excavator main body in front and rear two rows in the same direction, and from a predetermined position behind the shield excavator to the two optical scales. A shielded excavator direction detecting device, which is similar to a rotary laser light emitting device that emits light while rotating a laser beam toward the scale.