JPH0248559Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a segment gripping device, which is capable of reliably gripping a segment, especially when conveying the segment to the inner circumferential wall of a tunnel.
The present invention relates to a segment gripping device that can quickly grip and separate segments.

Segments are assembled on the inner circumferential wall of a tunnel excavated by a shield tunneling machine for water stoppage and reinforcement purposes. Incidentally, the segments are previously divided into a plurality of parts so that they can be easily assembled in a narrow tunnel, and the divided arcuate segments are assembled one by one. The shield tunneling machine is generally equipped with a device for assembling the divided segments, which weigh more than one ton. This segment assembly device
As shown in the figure, there is an erector b rotatably provided in the shield frame a along its inner circumferential wall, a hanging beam c provided on the erector b so as to be movable in the radial direction, and a hanging beam c attached to the hanging beam c. It mainly consists of a segment gripping device d provided. The segment assembly device is capable of transporting a segment gripped by a gripping device d to a desired location on the inner circumferential wall of the tunnel by interlocking operation of an erector b and a hanging beam c.

By the way, in the conventional segment gripping device d, as shown in FIG. Tsute segment g
The device was configured to grip the protrusion f etc. of the device.

However, it is difficult to accurately grip the protrusion f etc. with the gripping tool e, and it is necessary to manually align the segments g when assembling the segments. For this reason, for example, the gripper e
The falling of the segment g was prevented by inserting the pin h across the protrusion f and the protrusion f, but the pin h had to be inserted and removed each time the segment g was gripped or separated. However, this forced the operator to rely on manual labor, causing delays in the assembly of the segments. Therefore, it has been difficult to automate segment gripping using the conventional method.

The present invention was devised to solve these problems, and its purpose is to be able to accurately grasp segments, quickly grasp and separate segments, and automate segment assembly work. An object of the present invention is to provide a segment gripping device that can contribute to improved safety and speed.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIGS. 3 and 4, the shield tunneling machine has a cylindrical shield frame 1 forming its outer shell.
In this shield frame 1, an annular erector 2 is rotatably provided along the inner circumferential wall of the shield frame 1 via a support roller 3. A gear 4 concentric with the erector 2 is attached to the front end of the erector 2.
A pinion 5 fixed to a drive shaft of a motor M is meshed with this gear 4.

An arch-shaped hanging beam 7 is provided at the rear end of the erector 2 along its circumferential direction so as to be movable in the radial direction via a pair of guide rods 8 and a support arm 9. Guide rod 8 is hanging beam 7
, and each is slidably fitted into a guide hole 10 of a support arm 9 fixed to the erector 2. A cylinder 11 for moving the suspension beam 7 in the radial direction is spanned between each support arm 9 and the suspension beam 7.

The gripping device according to the present invention may be installed directly on the suspension beam, but in the embodiment, it is installed on the holding base 16 via the balancer 12.

That is, the hanging beam 7 has a slightly smaller arch-shaped tunnel 12 and a pair of guide bars 13.
A cylinder 14 is provided to be slidable in the axial direction of the erector 2 via the balancer 12, and a cylinder 14 for sliding the balancer 12. A holding base 16 is provided on the outside of the balancer 12 via a ball joint 15. This holding base 16 is a base for holding the segment to be transported, and is formed in an arcuate or bow shape along the inner surface of the segment. A set of cylinders 17 for adjusting the attitude of the holding base 16 is spanned between the holding base 16 and the balancer 12. This cylinder 17 includes the balancer 12 and the holding base 16.
They are arranged at both ends of the balancer 12 at a predetermined distance rearward in the axial direction of the erector 2 from the ball joint 15 provided in the center of the erector 2 as a reference, and when both cylinders are expanded and contracted simultaneously, the holding base 16 moves to the ball joint 15. The holding base 16 swings in the circumferential direction of the erector 2 with the ball joint 15 as the fulcrum when both cylinders are alternately expanded and contracted.

At the center of the outer surface of the holding base 16, there is an engagement hook 20 that faces outward in the radial direction of the erector 2 and is rotatably engaged with an engagement hole 19 formed in the center of the inner surface of the segment 18. It is placed prominently. As shown in FIG. 5, this engaging hook 20 is composed of a rod having a support flange 21 at its base end and a T-shaped hook portion 22 at its distal end. It is rotatably attached via 23.

The engagement hole 19 of the segment 18 has an insertion opening 24 into which the hook portion 22 of the engagement hook 20 can be vertically inserted, as shown in FIGS.
The hook part 22 inserted into the engaging chamber 25 is rotated 90 degrees to engage with the ceiling wall of the engaging chamber 25. . A cylinder 26 is provided in the holding base 16 as a means for rotating the engagement hook 20, and the tip of the piston rod 27 of this cylinder 26 is connected to the support flange 2 as shown in FIG.
It is connected to a protrusion 28 protruding from an eccentric portion on the top of the holder. That is, the cylinder 26 is set so that the engagement hook 20 can be rotated within a range of θ=90° by expanding and contracting the piston rod 27, and thus the engagement hook 20 can be rotated within the range of θ=90°.
0 can be locked and released.

Further, a regulating member 29 for regulating one end of the segment 18 in the axial direction is provided on both sides of the front portion on the outer surface of the holding base 16 . The regulating member 29 is formed to have an angled cross section so as to come into contact with the front end surface 30 and the upper surface 31 of the segment 18, so as to be able to support the segment 18 in a fixed position. Note that when the segment 18 is suspended from the engagement hook 20, the regulating member 29
A small gap is provided between the upper receiving surface 32 of the segment 18 and the upper surface 31 of the segment 18 to facilitate attachment and detachment of the engagement hook 20 to and from the engagement hole 19.

Furthermore, the rear upper surface 31 of the segment 18 is pressed on both rear sides of the holding base 16 to push up the front upper surface 31 using the engagement hook 20 as a fulcrum, and a cylinder for pressing the regulating member 29 into contact with the front upper surface 31 is pressed. A pressing member 33 is provided. That is, the pressing cylinder 34 constituting the pressing member 33 is provided on both rear sides of the holding base 16 with its piston rod 35 facing the upper surface 31 of the segment 18, and its tip end when the piston rod 35 is contracted. A gap is provided between the upper surface 31 of the segment 18 and the upper surface 31 of the segment 18.

Next, the operation of the embodiment will be described.

First, when gripping the segment 18, the segment 18 is placed parallel to the erector 2 with its engagement hole 19 facing upward, as in the conventional case. Then, the holding base 16 is positioned directly above the segment 18 and lowered, and the hook portion 22 of the engagement hook 20 is inserted into the engagement hole 19 of the segment 18. In this case, the angle of the hook portion 22 is adjusted in advance to the insertion opening 24 of the engagement hole 19. Further, the holding base 16 is lowered by moving the suspension beam 7 radially outward.

The engagement hook 20 is connected to the engagement hole 19 of the segment 18.
Once inserted into the cylinder 26, the engaging hook 20 is inserted into the cylinder 26.
The engaging hook 20 is rotated by the drive of the engaging hook 20 to be in a locked state as shown in FIG. Then, by raising the retaining base 16, the segment 18 is engaged with the hook 2.
0, by extending the piston rod 35 of the pressing cylinder 34 and pushing down the rear end of the segment 18, the front end of the segment 18 is pushed up using the engagement hook 20 as a fulcrum, and the restriction member 29 is Apply pressure. This results in segment 18
Grasping is completed.

When gripping of the segment 18 is completed, the segment 18 is conveyed to a desired attachment position on the already assembled segment 36 by rotation of the erector 2, and the segment 18 is attached. Once the installation of the segment 18 is completed, press cylinder 34
The piston rod 35 of the segment 18 is retracted, the engagement hook 20 is rotated to release the lock, and the engagement hook 22 is pulled out from the engagement hole 19 of the segment 18. This causes the segment 18 to be separated from the engagement hook 20.

In this way, the segments 18 can be gripped and separated quickly and reliably by simply rotating the engaging hook 20 and extending and contracting the pressing cylinder 34, thereby speeding up the segment assembly work.

Note that the means for rotating the engagement hook 20 may be a motor, and the pressing member 33 may be constituted by a cam.

In summary, the present invention exhibits the following excellent effects.

(1) The engaging hook is engaged with the engaging hole of the segment, and one end of the segment is pressed against the regulating member by lever action using the engaging hook as a fulcrum, so the segment can be kept in a stable state. This ensures that the segment does not fall off when the erector rotates, improving safety.

(2) Segments can be grasped and separated quickly and easily by simply rotating the engaging hook and pressing the pressing member, which speeds up the segment assembly work and reduces tunnel construction costs. This can contribute to savings.

[Brief explanation of the drawing]

Figure 1 is a rear view of a shield excavation machine for explaining a conventional segment gripping device, Figure 2 is an enlarged sectional view of the same segment gripping device, and Figure 3 is a shield excavation machine equipped with a segment gripping device according to the present invention. The rear view of the machine, Fig. 4 is a sectional view taken along the line shown in Fig. 3, Fig. 5 is an enlarged sectional view showing the state in which the segments are gripped, Fig. 6 is a perspective view of the segments, and Fig. 7 is the engagement of the segments. FIG. 8 is an explanatory view showing the relationship between the hole and the engaging hook, and FIG. 8 is a plan view showing the rotating means for the engaging hook. In the figure, 1 is a shield frame, 2 is an erector,
7 is a hanging beam, 16 is a holding base, 18 is a segment, 19 is an engagement hole, 20 is an engagement hook, 29 is a regulating member, and 33 is a pressing member.

Claims (1)

[Scope of utility model registration request] A segment gripping device installed on a rotating erector of a shield excavator and removably gripping a segment to convey it to the inner peripheral wall of a tunnel includes a holding base provided for holding the segment on the erector, and a holding base on the holding base. An engagement hook is provided facing outward in the radial direction of the erector and is removably engaged with an engagement hole formed in the center of the inner surface of the segment by rotation, and an engagement hook formed on the holding base plate. , comprising: a regulating member for regulating one end of the segment in the axial direction; and a pushing member for pressing the other end of the segment in pressure contact with the regulating member using the engaging hook as a fulcrum. segment gripping device.