JPH0442398Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a segment assembly device for assembling segments along the inner circumferential wall of a tunnel.

[Prior Art] The present applicant previously disclosed a shield excavator featuring a segment assembly device (Japanese Patent Application Laid-open No. 1989-1999).
261897). As shown in FIGS. 4 and 5, this segment assembly device has a swing ring 3 rotatably supported in a shield frame 1 via support rollers 2, and a pair of supports on the front surface of the swing ring 3. An arm 4 is formed, and a suspension beam 7 is supported on both support arms via a guide rod 5 and a telescopic cylinder 6 so as to be movable in the radial direction. Hanging beam 7
A base balancer 8 is supported movably in the axial direction of the turning ring 3 via a guide bar 9 and a slide cylinder 10 in the center thereof, and an end balancer 11 is mounted on the outside of this base balancer 8 with a ball joint 12 and a posture. It is supported via an adjustment cylinder 13. Ball joint 12
is located at the center of the base balancer 8, the posture adjustment cylinders 13 are located at both sides of the front end, and the end balancer 11 is located at the center of the base balancer 8.
The posture can be adjusted freely.

On the other hand, at the center of the outer surface of the end balancer 11, there is a twist-lock type segment hook 1 that engages with an engagement hole 14 formed in the center of the inner surface of the segment S.
5, and a telescoping segment support 16 that presses and holds the inner surface of the segment S supported by the segment hook 15 is provided at its peripheral edge. Furthermore, a bolt fastener 18 is provided at the front end and both ends of the end balancer 11 to be inserted into a bolt fastening portion 17 formed on the peripheral edge of the segment S to fasten the bolt. This bolt fastening machine 18 includes a socket that engages with the head of a bolt that is attached to one flange of the segment S in advance, and a nut rotating tool that engages and rotates a nut that is attached to the other flange. are provided at the tips of the pair of arm bodies 19. Note that M is a motor that drives the swing wheel 2 to swing via a ring gear 20 and a pinion 21.

[Problems to be solved by the invention] However, since this segment assembly device is configured to fit a normal segment S, it is not possible to assemble irregularly shaped segments with ducts, etc. Of course, the arm body 19 of the bolt fastening machine 18 was in the way and could not even support the irregularly shaped segment. In order to support and transport the irregularly shaped segment, it is necessary to remove the bolt fastener 18 from the end balancer 11,
Alternatively, it is necessary to remove the end balancer 11 itself and replace it with one that does not have the bolt fastener 18, which is difficult. In addition, even when assembling normal segments S, the bolt fastening machine 1
8 is out of order, even if you want to tighten the bolts manually, there is a problem that you cannot do it because the bolt tightening machine 18 gets in the way.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and its purpose is to be able to support and transport irregularly shaped segments, and to prevent the bolt fastening machine from getting in the way if the bolt fastening machine 18 breaks down. An object of the present invention is to provide a segment assembly device that allows manual bolt tightening.

[Means for Solving the Problems] The present invention provides a radially movable suspension beam on a turning ring that can rotate along the inner circumference of a tunnel, and a suspension beam that is provided with a suspension beam that is movable in the radial direction. A segment hook that removably engages with a matching hole to lift the segment, a segment support that presses against and holds the segment supported by the segment hook, and a bolt formed on the periphery of the segment. In a segment assembly device equipped with a balancer having a bolt fastening machine that is inserted into a fastening part to fasten bolts, an extension aid is provided at the tip of the segment hook in order to separate the bolt fastening machine from the bolt fastening part. A hook is removably provided, and an auxiliary support for extension is removably provided at the tip of the segment support.

[Operation] When handling irregularly shaped segments, an auxiliary hook is attached to the segment hook and an auxiliary support is attached to the segment support, and the irregularly shaped segment is supported by these. These auxiliary hooks and auxiliary supports allow the bolt fastening machine to move away from the bolt fastening portion of the irregular segment, so that the bolt fastening machine can support the irregular segment without getting in the way. Furthermore, since the bolt fastening machine is located away from the bolt fastening part, it is possible to manually tighten the bolts by inserting an instrument such as a spanner into the bolt fastening part. Therefore, even if the bolt fastening machine breaks down during normal segment assembly, manual assembly can be easily performed in the same manner.

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention. Incidentally, the same parts as those in the conventional structure shown in FIG. 5 are given the same numbers, and redundant explanation will be omitted.

As shown in the figure, a segment hook 15 in which a hook portion 23 is formed in a T-shape is provided at the center of the outer surface of the end balancer 11 at the tip of the rotating shaft 22, and this segment hook 15 is attached to the base of the rotating shaft 22. It is designed to be rotated by a drive source (not shown) connected to the end. Furthermore, a plurality of segment supports 16 are attached to the outer surface of the end balancer 11, with the cylinder 24 side buried and the piston rod 25 side protruding. A bolt fastening machine 18 having an arm body 19 inserted into the formed bolt fastening portion 17 is attached. The bolt fastener 18 is attached to the tip of the segment hook 15 and the tip of the segment support 16.
An auxiliary hook 26 and an auxiliary support 27 for separating the bolt from the bolt fastening machine 17 are removably attached.

The auxiliary hook 26 has a segment hook 1 attached to the tip of a shaft 28 which is connected to the tip of the segment hook 15 to extend it as shown in FIG.
5, the hook part 29 is formed in a T-shape, and the segment hook 15 has a female screw part at its tip as a connecting means, and the shaft body 2 of the auxiliary hook 26.
8 has a male threaded portion 30 that screws into the female threaded portion.
is formed. As shown in FIG. 3, the auxiliary support 27 consists of a shaft body connected to extend the tip of the piston rod 25 constituting the segment support 16, and as a connection means, a female thread is provided at the tip of the piston rod 25. A male threaded portion 31 is formed at one end of the auxiliary support 27 to be screwed into the female threaded portion.

When assembling a normal segment S, the auxiliary hook 26 and the auxiliary support 27 are removed, the segment hook 15 is engaged with the engagement hole 14 of the segment S, and the segment support 16 is pressed against the inner surface of the segment S. When the segment hook 15 is engaged with the engagement hole 14 of the segment S, the arm body 19 of the bottle fastener 18 is inserted into the bolt fastening portion 17 of the segment S. Therefore,
If the segment S is conveyed to a predetermined position by turning the turning wheel 3 and moving the suspension beam 7 in this state, it can be automatically bolted to the existing segment.

On the other hand, when assembling irregularly shaped segments, an auxiliary hook 26 and an auxiliary support 27 are attached to the distal end of the segment hook 15 and the distal end of the segment support 16, respectively. Note that the irregular segment differs from the normal segment S only in shape, and the engagement hole 14 and bolt fastening portion 17 are formed similarly to the normal segment S. Then, the auxiliary hook 26 is engaged with the engagement hole of the irregularly shaped segment, and the auxiliary support 27 is pressed against the inner surface of the irregularly shaped segment. Thereby, the irregularly shaped segment can be supported with the bolt fastening machine 19 spaced apart from the bolt fastening portion 17. Since the bolt fastening machine 18 is spaced apart from the bolt fastening part 17, it is possible to insert an instrument such as a spanner into the bolt fastening part 17 and manually tighten the bolt.

In this way, the bolt fastening machine 18 does not interfere with manual bolt tightening work, so even if the bolt fastening machine 18 breaks down, it is possible to assemble normal segments in the same way.

Note that the means for connecting the auxiliary hook 26 and the auxiliary support 27 is not limited to the above embodiment.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) Segments can be supported with the bolt fastening machine separated from the bolt fastening part using auxiliary hooks and supports, so it is possible to support and transport irregularly shaped segments, and manual bolt tightening is facilitated. I can do it.

(2) Furthermore, since manual bolt tightening work is possible, even if the bolt tightening machine breaks down, it is possible to support and transport the segments normally.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the segment assembly device according to the present invention, Fig. 2 is a perspective view of section A in Fig. 1, Fig. 3 is a perspective view of section B in Fig. 1, and Fig. 4 is a conventional device. FIG. 5 is a sectional view taken along the line CC in FIG. 4. In the figure, 3 is a turning wheel, 7 is a suspension beam, 11 is a balancer (end balancer), 15 is a segment hook, 16 is a segment support, 17 is a bolt fastening section, 18 is a bolt fastening machine, 26 is an auxiliary hook,
27 is an auxiliary support, and S is a segment.

Claims (1)

[Scope of utility model registration request] A suspension beam movable in the radial direction is provided on a swing ring that can rotate along the inner circumference of the tunnel, and the suspension beam is removably engaged with an engagement hole formed on the inner surface of the segment to hold the segment. A segment hook for lifting, a segment support that presses against the inner surface of the segment supported by the segment hook to hold it, and a bolt fastener that is inserted into a bolt fastening part formed on the periphery of the segment to fasten the bolt. In the segment assembly device, an auxiliary hook for extension is removably provided at the tip of the segment hook in order to separate the bolt tightening device from the bolt tightening part, and the tip of the segment support is provided with an auxiliary hook for extension. A segment assembly device characterized in that an auxiliary support for extension is detachably provided at the section.