JPH026159Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the erector of the shield tunneling machine.
In particular, it relates to improvements to the erector's hydraulic system.

Erecta is a device that stretches segments on the inner wall of a tunnel excavated by a shield tunneling machine.This is explained based on the conventional example shown in Figure 1. A rotary frame 1 is rotatably supported along the rotary frame 1, and a guide rod 3 is engaged with an arm 2 protruding from the rotary frame 1 in the axial direction of the rotary frame 1 so as to be movable back and forth in the radial direction of the rotary frame 1. It has a segment suspension frame 4. A telescopic jack 5 is pivotally supported at the base end of the segment suspension frame 4 for reciprocating the suspension frame. Further, a gripping member 6 for gripping the segment is provided at the tip of the suspension frame 4, and a sliding jack 7 for adjusting and moving the segment in the axial direction of the rotating frame 1 is engaged with the gripping member 6.

Then, the telescopic jack 5 and the sliding jack 7 are
A hydraulic control mechanism 8 for controlling the erector is provided apart from the erector, and includes a hydraulic power unit 9 and a hydraulic valve block 10 that constitute the hydraulic control mechanism 8.
A second hydraulic hose 12 is loosely installed from the hydraulic valve block 10 to the telescopic jack 5 via the rotating frame 1 and the arm 2, and is further installed on the arm 2. The second
A third hydraulic hose 13 is branched from the hydraulic hose 12 of the third hydraulic hose 12 and is loosely guided to the sliding jack 7 via the segment suspension frame 4.

With this structure, the segment is once gripped by the segment gripping member 6, the suspension frame 4 is moved radially inward to lift the segment, and the rotating frame 1 is rotated to move it to a desired position on the tunnel inner wall. , this time hanging frame 4
The segment that was being lifted by moving it radially outward is placed adjacent to the already tensioned segment, and the gripping member 6
By repeating the series of actions of separating from the tunnel, the segment can be stretched on the inner wall of the tunnel.

However, since the hydraulic control mechanism 8 is installed separately, the hydraulic hoses 11, 12, 13 are required.
Of these, especially the hydraulic hose 12 between the hydraulic valve block 10 and the rotating frame 1 and the hydraulic hose 13 between the arm 2 and the segment suspension frame 4 connect the fixed side and the movable side, so that When rotating or reciprocating the segment suspension frame 4 in the radial direction, the hydraulic hoses 12,
There was a risk of damage due to the 13 getting caught on surrounding objects or being twisted, which caused problems in terms of maintenance and management.

Therefore, in order to solve this problem, in the past, as shown in FIG.
A hydraulic hose (not shown) passed through the arm 2 is connected to the telescopic jack 5, and a hydraulic hose (not shown) passed through the segment suspension frame 4 after being loosened from the arm 2 is connected to the sliding jack 7. Although the number of hydraulic hoses has been reduced compared to before, the hydraulic hose 15 is still required between the arm 2 and the suspension frame 4, so the effect is not necessarily sufficient. I couldn't perform.

This idea was made in view of the above circumstances,
The purpose is to obtain an erector for a shield excavator that can significantly reduce the risk of twisting and breakage of the hydraulic hose and shorten the overall length of the hydraulic hose.

In order to achieve the above object, this invention consists of a rotating frame that is rotatably supported along the inner periphery of the shield tunneling machine, and a segment suspension frame that is movable back and forth in the radial direction of the rotating frame. In the erector of the shield excavator, the suspension frame is provided with a segment gripping member that grips the segment by its operation, and the segment gripping member and the segment suspension frame are operated by a hydraulic jack. A hydraulic control mechanism for controlling the jack is provided within the segment suspension frame, and a hydraulic hose for supplying oil from the hydraulic control mechanism to the hydraulic jack is disposed within the suspension frame.

As a result, most of the hydraulic hoses are housed within the segment suspension frame, eliminating the need for hydraulic hoses to cross between the rotating frame and the arm, and between the arm and the segment suspension frame, making it possible to operate without routing the hydraulic hoses. This is to prevent it from becoming twisted or damaged.

A preferred embodiment of the erector for a shield tunneling machine according to this invention will be described below with reference to the accompanying drawings.

In the erector according to this embodiment, the configurations of the erector structure, hydraulic jack, and hydraulic control mechanism itself are the same as those of the conventional example.

As shown in FIG. 3, the segment suspension frame 4 engaged with the arm 2 has a rectangular cross section, and a hydraulic control mechanism of the same shape is accommodated within the frame 4. As illustrated in FIG. 4, a hydraulic power unit 9 is installed at one end of the segment suspension frame 4, which is curved in an arc along a part of the rotating frame 1, and a hydraulic valve block 10 is installed at the other end. ing. From these, there is a telescopic jack 5 that reciprocates the segment suspension frame 4 in the radial direction, a sliding jack 7 that adjusts and moves the segment gripping member 6 in the axial direction, and a support jack 20 that supports gripping of the segments.
Hydraulic hoses for supplying oil to the segment suspension frame 4 are all disposed within the segment suspension frame 4 so as to avoid contact with the outside of the suspension frame 4 as much as possible.

Oil supply to the telescopic jacks 5 provided vertically on both the left and right sides of the rotating frame 1 is performed as shown in FIG. 5, which is an enlarged view of the circled area A in FIG.
The two oil inlets and outlets 16 and 17 of the telescopic jack 5 are both provided on the piston rod 18 side, and the hydraulic hose 1 is inserted into these oil inlets and outlets 16 and 17 by slightly extending it from the end of the segment suspension frame 4.
This is done by connecting 9 and 19. This prevents the hydraulic hose 19 from crossing between the arm 2 and the segment suspension frame 4, and prevents the oil inlet/outlet 16, 17 and the segment suspension frame 4 from crossing even when the piston rod 18 expands and contracts.
The relative positions of the two do not change.

The operation of this embodiment having the above configuration will be described.

The hydraulic power unit 9 and hydraulic valve block 10 are supplied with oil to control each jack 5, 7, 20, and the segment gripping member 6 and segment suspension frame 4 are operated. When the segment gripping member 6 is operated, the only movable parts are the piston rod of the sliding jack 7 and the gripping member 6, and these are not connected to the hydraulic hose for supplying oil to the sliding jack 7. There is no risk of twisting or breaking. The same applies to the support jack 20 that is controlled when supporting the segment gripped by the gripping member 6.

On the other hand, when operating the segment suspension frame 4 after gripping the segment, the segment suspension frame 4 moves in the radial direction by the expansion and contraction of the piston rod 18 of the telescopic jack 5, but the piston rod 18 and the segment suspension frame 4 are Since the relative positions do not change and they move integrally, the extracted hydraulic hose 19 does not expand or contract, and since the length of the extracted hydraulic hose 19 is short, it does not come into contact with the outside. Therefore, the risk that the hydraulic hose 19 connected to the telescopic jack 5 will be twisted or damaged is greatly reduced.

Because the hydraulic hose runs between the fixed side and the movable side, this erector is more efficient than conventional erectors, which have a high risk of damage due to the hydraulic hose being twisted or caught on surrounding objects. In the example erecta,
Since the hydraulic control mechanism 8 and the hydraulic hose 19 are all housed within the segment suspension frame 4, there is no crossing of the hydraulic hose 19, and there is little contact between the hydraulic hose 19 and the outside, which improves the safety of the hydraulic hose. It can be improved significantly.

In summary, this invention provides the following excellent effects.

(1) The hydraulic control mechanism is installed within the segment suspension frame, and the hydraulic hose for supplying oil to the hydraulic jack is placed within the suspension frame, eliminating the need for the hydraulic hose to cross between the fixed side and the movable side. ,
The risk of twisting and damage to hydraulic hoses can be greatly reduced.

(2) Most of the hydraulic hoses fit within the segment suspension frame, and there is no need to loosen the hydraulic hoses, so the overall length of the hydraulic hoses can be shortened.

(3) As the hydraulic system is housed within the segment suspension frame, fewer accessories are attached to the outside of the suspension frame, reducing the risk of damage to the erector.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views showing the hydraulic system of a conventional erector, Figure 3 is a sectional view of the erector showing a preferred embodiment of this invention, and Figure 4 is a front view of the same.
FIG. 5 is an enlarged view of section A in FIG. 4. In the figure, 1 is a rotating frame, 4 is a segment suspension frame, 5 is a telescopic jack, 6 is a segment gripping member, 7 is a sliding jack, 8 is a hydraulic control mechanism, 9 is its hydraulic pump unit, and 10 is the same. Hydraulic valve block, 19 is a hydraulic hose.

Claims (1)

[Scope of utility model registration request] The shield tunneling machine has a rotating frame that is rotatably supported along the inner periphery of the shield tunneling machine, and a segment suspension frame that is movable back and forth in the radial direction of the rotating frame. A segment gripping member for gripping the segment is provided,
In the erector of the shield excavator, the segment gripping member and the segment suspension frame are operated by a hydraulic jack, and a hydraulic control mechanism for controlling the hydraulic jack is provided in the segment suspension frame, and the segment suspension frame is operated by a hydraulic jack. An erector for a shield excavator, characterized in that a hydraulic hose for supplying oil to a hydraulic jack from the hydraulic control mechanism is disposed within the holding frame.