JPH07103798B2 - Bolt nut fastening device for segment assembly - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bolt nut fastening device for segment assembly for fastening a segment lining an inner wall of a tunnel with a bolt nut.

(Prior Art) The inner wall of a tunnel excavated by a conventional shield machine is
The segment erector provided in the shield body covers the segments by assembling the segments along the inner wall. The segment erector is equipped with a bolt-nut fastening device, and the segments are fastened with bolts and nuts during segment assembly. Those that automatically perform the work have also been put into practical use (for example, Japanese Patent Application Nos. 2-19297 and 2-19298).

(Problems to be Solved by the Invention) However, since the conventional bolt-nut fastening device has a structure in which it is projected inside the shield body, the effective hollow inside the shield body becomes small, and even if it can be applied to a shield excavator with a large diameter. ，
There are problems such as being difficult to apply to shield excavators with small and medium diameters.

Further, when the system goes down, there is a problem that the bolt and nut fastening device becomes an obstacle and manual fastening work becomes difficult.

The present invention has been made for the purpose of improving the above conventional problems, and an object thereof is to provide a bolt / nut fastening device for segment assembly which can be applied to a shield excavator having a small or medium diameter.

(Means and Actions for Solving the Problem) In order to achieve the above object, the present invention provides a lower traveling body that is movable in an existing segment, and an outer periphery that can move on the lower traveling body and can be divided into a plurality of sections. A ring, a slewing ring rotatably supported in the outer ring, and a swingingly mounted front face of the slewing ring via an elevating frame, and being guided by the inner peripheral surface of the existing segment to secure a fastening position. It is provided with a fine turning frame for positioning, a bolt feeding device and a bolt nut fastening head which are attached to the fine turning frame so as to be freely turnable and are movable in the front-rear direction by a telescopic arm.

With the above structure, the bolt and nut fastening device can move independently of the shield body, so it is possible to tighten the bolt and nut of the existing segment, and by assembling and disassembling inside the shield body, it becomes a shield excavator of medium and small diameter. Can also be applied.

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

FIG. 1 shows a cross-sectional view of a shield excavator having a medium or small diameter. In this figure, reference numeral 1 denotes a shield body, which is propelled into the ground by a plurality of shield jacks 2.

A cutter head 3 is provided at the front part of the shield body 1, and the earth and sand excavated by the cutter head 3 are taken into the shield body 1 and then the screw conveyor 4
And, it is carried out to the rear by the earth and sand carrying device (not shown).

In the figure, 5 is a segment erector that positions the segment 6 along the inner wall of the tunnel excavated by the shield body 1,
Reference numeral 7 denotes a bolt / nut fastening device body for fastening the positioned segments 6 with a bolt / nut.

As shown in FIG. 4, the main body 7 of the bolt and nut fastening device has a lower traveling body 8 which is slidably moved in the existing segment 6 by a sley liner 8a as shown in FIG.

The lower traveling body 8 is divided into two parts, front and rear, and each member
8 ₁ and 8 ₂ are connected by a connecting link 9 via a spherical joint 9a, and a guide rail 8b is laid on the upper part of the guide rail 8b.
Is designed to move.

The outer peripheral ring 10 has a structure that can be divided into four parts, and it travels on the guide rail 8b by a sled (or roller) 10a provided at the lower part, and when the lower part of the outer peripheral ring 10 and the lower traveling member 8 are rearranged. A rearrangement jack 11 for moving the outer peripheral ring 10 is provided, and a front end stopper 12 and a rear end stopper 13 for fixing the upper portion of the outer peripheral ring 10 to the existing segment 6 are provided on the upper portion thereof.

In addition, on the front and rear surfaces of the outer peripheral ring 10, the existing segment 6
An elevating device 14 capable of vertically moving the outer peripheral ring 10 by hooking a hook 14a on the upper part is provided, and a plurality of rollers 15 are provided on the inner peripheral part. The outer circumference of 16 is rotatably supported.

The swivel ring 16 has a structure that can be vertically divided into two parts, and an elevating frame 17 is attached to a front surface of the swivel ring 16 so as to be vertically movable by a support guide 16a.

As shown in FIG. 5, the elevating frame 17 is T-shaped in a substantially U-shape, and can be raised and lowered by a pair of elevating jacks 18 provided on the swivel ring 16. A fine swing frame 20 of the swing device 19 is swingably supported by a support shaft 20a.

The finely swiveling frame 20 has a plurality of leg portions 20b protruding from the outer periphery thereof, and the roller 2 supported at the tips of the leg portions 20b.
0c rolls on the inner peripheral surface of the existing segment 6, whereby the fine swing frame 20 swings around the support shaft 20a and follows the inner peripheral surface of the existing segment 6. There is.

Reference numeral 22 in the figure denotes a stopper that restricts the swing of the fine swing frame 20.

On the other hand, the fine turning device 19 comprises the fine turning frame 20 and a turning body 24 movably attached to the fine turning frame 20.

A swivel motor 25 is attached to the swivel body 24, and a pinion 25a that meshes with a rack 20d laid on the fine swivel frame 20 is attached to the swivel motor 25. The swivel motor 25 rotates the pinion 25a. By doing
The revolving structure 24 can revolve with respect to the fine revolving frame 20.

In addition, the revolving structure 24 has a telescopic arm that can be telescopically moved forward and backward.
26 is projected forward.

The telescopic arm 26 is a fixed arm 26 fixed to the revolving structure 24.
a and a movable arm that can move back and forth with respect to this fixed arm 26a.
The movable arm 26b is moved forward and backward by a screw shaft 26c, and a bolt nut supply device 27 and a bolt nut fastening head 28 are attached to the movable arm 26b by a screw shaft 26d so as to be movable back and forth.

Since the bolt / nut supply device 27 and the bolt / nut fastening head 28 are the same as the conventional ones, detailed description thereof will be omitted.

Two bolt-nut supply devices 27 and two bolt-nut fastening heads 28 are mounted on the left and right.

Next, the operation will be described.

The bolt and nut fastening device can be applied to both concrete and iron segments. First, when the bolt and nut fastening device main body 7 is moved to the vicinity of the tip of the already assembled segment 6, the bolt and nut fastening device is provided on the upper part of the outer peripheral ring 10. The tips of the front end stopper 12 and the rear end stopper 13 are crimped to the existing segment 6 as shown in FIG. 1 to fix the outer peripheral ring 10.

Next, the turning ring 10 is turned along the segment 6 assembled by the segment erector 5, the bolt is inserted into the already-assembled segment 6, and the nut screwed into the bolt is fastened by the bolt nut fastening head 28. Then, the fine turning frame 20 is swung so as to follow the inner peripheral surface of the existing segment 6, and the fastening surface is positioned.

The bolts and nuts can be fastened simultaneously by the two bolts and nuts fastening heads 28, and the bolts and nuts are supplied from the bolts and nuts feeder 27 to the bolts and nuts fastening head 28 in one piece.

Then, at the time of the refilling, the refilling work can be performed by moving the outer peripheral ring 10 by the refilling jack 11.

(Effects of the Invention) As described in detail above, since the bolt-nut fastening device is independent from the shield body as described above, the present invention can be applied to a small-to-medium-diameter shield machine and fastens existing segments. It can also be applied to automatic tightening of bolts and nuts.

Also, because the fastening position is positioned by following the existing segment, the positioning work can be done efficiently in a short time, and even if the system goes down, it can be moved, so the bolt-nut fastening device becomes an obstacle. Problems such as difficulty in fastening bolts and nuts do not occur. Moreover, since it can be easily assembled and disassembled within the shield body, it can be easily transported by a carrier truck, etc., and is versatile because it can be diverted to another shield machine.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a sectional view of a shield machine, Fig. 2 is a sectional view taken along line II-II of Fig. 1,
FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1, FIG. 4 is a perspective view of the bolt nut fastening device in the vicinity of the outer ring, and FIG.
The figure is an exploded perspective view of the vicinity of the bolt and nut fastening head. 6 …… Segment, 8 …… Lower traveling body 10 …… Outer ring, 16 …… Swing ring 17 …… Lift frame, 20 …… Slight swing frame 26 …… Extensible arm 27 …… Bolt Nut feeder 28 …… Bolt Nut fastening head

Claims (1)

[Claims] 1. A lower traveling body 8 which is movable in an existing segment 6, an outer peripheral ring 10 which can move on the lower traveling body 8 and can be divided into a plurality of parts, and a rotatably supported in the outer peripheral ring 10. Swivel ring 16 and a fine swivel frame which is mounted on the front surface of the swivel ring 16 so as to be able to move up and down and swing through an elevating frame 17 and is guided by the inner peripheral surface of the existing segment 6 to position the fastening position. A segment-assembling bolt and nut fastening device comprising: 20, a bolt supply device 27 that is rotatably attached to the fine swivel frame 20, and is movable in the front-rear direction by a telescopic arm 26, and a bolt nut fastening head 28.