JPH0449400A - Grip of erector - Google Patents

Abstract

PURPOSE:To make efficient the manual assembling of a segment by providing a extensible mechanism of a handle to the radial direction of the rotary ring at the grip device of the erector of a shield excavator, and securing a working space around the grip device. CONSTITUTION:A screw shaft 23 as a handle is made possible to be extensible to the radial direction of a swing ring 20 against a grip frame 26 by a hydraulic jack 30 constituting the extensible mechanism. Next, the front edge of the rod of the hydraulic jack 30 is connected through a lever 34 at the outer periphery of the bottom of a sliding cylinder 32 and then the base end of the screw shaft 23 is connected to the electric motor 35 firmly fitted within the sliding cylinder 32. Next, when it is used for an automatic erector, the hydraulic jack 30 is constricted and the sliding cylinder 32 is contained into an intermediate cylinder 31 to automatically assemble a segment 9. When it is used for a manual erector, the hydraulic jack 30 is extended to assemble the segment 9.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Utilization Public Expenses> The present invention relates to a grip device for an erector in a shield excavator.

<Prior Art> FIG. 3 shows the overall cross-sectional structure of a shield excavator having an erector. In the figure, a cutter head 2 is provided with a large number of cutter bits 1, and the cutter head 2 is rotatably driven by a rotary drive device 4 in a skin plate (shield body) 3, and is connected to segments such as stills of shoring. 9
is used as a reaction force to dig forward while being pushed forward by the shield jack 5. The skin plate 3 protects the interior of the aircraft from the surrounding ground.

Then, the soil that has been dissected for tM is discharged to the rear through circulation through the mud feeding pipe 6 and the mud draining pipe 7 using a mud water transport system. In the figure,
Reference numeral 8 is erector-1 for assembling segment 9.
0 is an agitator for mixing muddy water, and 11 is a segment 9 attached to the tip of the rod 13 of the shield jack 5.
This is a holding plate called a "spreader" for pressing the front end of the

Conventionally, as the erector 8, as shown in FIG.
A swivel ring 20 rotatably supported on the inner periphery of the shield excavator, a lifting device 21 provided to be able to reciprocate in the radial direction of the swivel ring 20, and a segment 9 driven by the lifting device to grip the segment 9. a gripping device 22 capable of
A screw shaft 23 as a gripping part of the gripping device 22
There is a manual type in which the grip device 22 is fixedly provided (in other words, it cannot be extended or contracted in the radial direction of the swivel ring 20).

The elevating device 21 is connected to a bifurcated arm 24 that supports the grip device 22 at an intermediate portion of the arm, and to both ends of the arm 24, and lifts and lowers the grip device 22 in the radial direction of the turning ring 20 (reciprocation Wb ) and a pair of hydraulic jacks 25.

In recent years, there has been a trend toward folding automatic assembly functions to make the grip more multifunctional. For example, as shown in FIG. A posture control device 27 that enables movement and rotation of each axis (x, y, z axes) on the frame 26, an automatic bolt/nut tightening device 28 that automatically tightens bolts and nuts during segment assembly, and various sensing devices. Some devices are equipped with sensors 29 and the like for this purpose. The other configurations are the same as in FIG. 4.

<Problem to be solved by the invention> By the way, although it is an automatic erector as described above, it does not necessarily correspond to all segments, especially when it comes to songs.
Taper segment and segment l1Wl during A construction! If the structure changes (for example, when changing from a concrete segment to a thicker cast iron segment), it is necessary to manually assemble the segments, move them to the specified position, and tighten bolts and nuts. .

However, as mentioned above, even if you try to assemble the segments manually, there is a risk that the mechanical vibrations on the grip frame will interfere with the tightening of the screw shafts, etc. - During operation, there was a problem that the field of view was narrowed by the equipment on the grip frame, making it difficult to operate.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a grip device that can effectively secure a working space for turning the grip device when segment assembly is switched from automatic to manual.

<Means for Solving the Problems> The configuration of the present invention for achieving the above object includes a swing ring rotatably supported along the inner periphery of the shield excavator, and a reciprocating motion of the swing ring in the radial direction. In the erector of a shield excavator, which is equipped with a freely provided elevating device and a grip device that is driven by the elevating device and can grip a segment, the grip device has a gripping portion that extends and retracts in the radial direction of the swivel ring. It is characterized by having an expansion and contraction mechanism that allows the

Function> In the state of automatic erector, the grip part is housed in the grip device, and the gripped segment is connected to the grip frame of the grip device for automatic assembly, and is placed in the grip frame, etc. Various types of equipment will be automatically assembled into segments.

On the other hand, in order to assemble the segments manually, the gripping part is extended by the telescoping mechanism and the gripping part is separated from the gripping device. Since the segments gripped by the gripping portion are separated from the grip frame and the respective seals arranged on the grip frame, the above-mentioned equipment does not become an obstacle when assembling the segments manually. In other words, a work space is secured around the grip device.

Embodiment> An embodiment of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a front view of the automatic erector according to the present invention, and the second
The figure is an enlarged sectional view of the main part of the grip device incorporated in this automatic erector.

As shown in the figure, a rotating ring 20 supported within a shield excavator, a lifting device 21 that reciprocates in the radial direction of the rotating ring 20, and a hydraulic jack 25 of the lifting device 21 are driven via an arm 24. An erector 8 is constituted by a grip device 22 for gripping the segment 9.

The grip device 22 includes a posture dividing device 27 that enables movement and rotation of each axis, and an automatic bolt/nut fastening device 2.
8, various sensors 29, etc. are arranged on the grip frame 26.

The configuration up to this point is similar to the conventional automatic collector shown in FIG.

In this embodiment, the threaded shaft 23 as a gripping portion can be expanded and contracted in the radial direction of the turning ring 20 with respect to the grip frame 26 by a hydraulic jack 30 that constitutes an expansion and contraction mechanism.

That is, the intermediate cylinder portion 31 of the grip frame 26 is used as an outer cylinder, and the inner cylinder consisting of a sliding cylinder 32 is telescopically fitted through a slide metal 33, and the threaded shaft 23 is inserted from the lower end of this sliding cylinder 32. The tip side is protruded.

A hydraulic jack 30 is attached to the outer periphery of the lower end of the sliding tube 32.
The tip of the rod is connected via a lever 34, and the base end of the screw shaft 23 is connected to an electric (or hydraulic) motor 35 fixedly installed inside the sliding tube 32.

Note that 36 in FIG. 2 is a lead wire of the electric motor 35.

Because of this structure, when used as an automatic erector, the hydraulic jack 30 is contracted and the sliding tube 32 is completely housed in the intermediate tube portion 31, and the segment 9 is
All you need to do is perform automatic assembly.

On the other hand, when used as a manual erector, the segment 9 is assembled with the sliding tube 32 protruding from the intermediate tube portion 31 by extending the hydraulic jack 30 and the screw shaft 23 separated from the grip frame 26. It's fine.

At this time, since a sufficient working space is secured between the grip frame 26 and the segment 9, the assembly work can be carried out quickly without any interference from various devices on the grip frame 26. In other words, manual assembly can be performed without removing equipment and the like while maintaining the speed with which it can be restarted as an automatic erector.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, and that the telescoping mechanism, gripping section, etc. can be changed as appropriate without departing from the gist of the present invention.

<Effects of the Invention> As explained above, according to the present invention, the gripped segment can be separated from the grip device, so that the work efficiency of manual segment assembly can be further improved.

Generally, when moving a segment in the radial direction of the swivel ring, a lifting device is used to move the segment, but since the lifting device moves not only the segment but also the entire grip device at the same time, a large amount of force is required, resulting in minute movements. l! l11
Although it is more difficult, the telescoping mechanism of the present invention is compact and suitable for fine movement because it is sufficient to have the force to support only the gripping portion and the segment.

In particular, when the gripping portion is a screw shaft or the like, it is necessary to move the support member such as the screw shaft in accordance with the pitch of the screw as the screw turns, and the telescoping mechanism of the present invention is effective for such operations.

[Brief explanation of drawings]

FIG. 1 is a front view of the automatic erector according to the present invention, and the second
The figure is an enlarged sectional view of the main part of the grip device incorporated in this automatic erector. FIG. 3 is a sectional view of the overall structure of the shield excavator, and FIGS. 4 and 5 are front views of different conventional erectors. In addition, in the drawing, 8 is a segment, 20 is a turning ring, 21 is a lifting device, 22 is a grip device, and 2 is a segment.
3 is a screw shaft, 26 is a grille, a brake frame, and 30 is a hydraulic jack. Figure Figure 3 Figure Figure 3

Claims (1)

[Claims] A swivel ring rotatably supported along the inner periphery of the shield excavator, a lifting device provided to be reciprocally movable in the radial direction of the swivel ring, and a grip device driven by the lifting device to grip the segment. 1. A grip device for an erector, characterized in that the grip device is provided with an expansion and contraction mechanism that expands and contracts a gripping portion thereof in a radial direction of the swivel ring.