JPH0663430B2 - Slit opening adjustment device for shield machine - Google Patents

Description

The present invention relates to a slit opening adjusting device for a shield machine.

[Prior Art] FIG. 5 shows a shield machine having a conventional intermediate beam supporting type cutter frame, in which a ring-shaped stiffening frame 2 is fixedly provided in a front portion of the shield frame 1. At the same time, a circular bulkhead 3 is integrally fixed to the central opening of the stiffening frame 2,
The cutter shaft 4 is supported by the rotary joint 5. Further, the cutter frame 6 is supported on the rear surface side by an intermediate beam 7, and a ring frame 8 is attached to the rear end of the intermediate beam 7, and at the boundary portion between the stiffening frame 2 and the bulkhead 3, Outer sealing member 9,10
Is supported through. Further, a bearing 11 having internal teeth is received on the rear surface of the ring frame 8, and the internal teeth of the bearing 11 have a pinion of a motor 12 installed on the stiffening frame 2.
The cutter frame 6 is rotated by driving the motor 12. Incidentally, 14 is a mud pipe, 15 is a mud pipe, 16 is a shield jack, 17 is a segment, 18 is a copy cutter, and 19 is an agitator.

As shown in FIG. 6, the cutter frame 6 is provided with a number of slits 20 for taking in the earth and sand corresponding to the diameter, and each slit 20 has a slit opening adjustment jack 21. A connected opening / closing plate 22 is provided.

[Problems to be Solved by the Invention] In such a shield machine, a large number of pipes for supplying pressure oil to the slit opening adjustment jack 21 are all connected via the rotary joint 5. Therefore, there is a possibility that the opening degree of the slit 20 may not be adjusted reliably. That is, since the hydraulic lines that operate the large number of slit opening adjustment jacks 21 are in communication with each other, the opening and closing speeds and strokes of the jacks 21 are different. Accordingly, the adjustment can be made only at the pushing end or the pulling end of the jack 21. Further, in general, an O-ring is provided between each flow path in the rotary joint, and the O-ring receives a compressive force by the pressure oil, which may cause an error.

The present invention ensures that all the slit opening adjustment jacks operate by the set amount.

[Means for Solving Problems] The present invention relates to a shield machine having a bulkhead arranged in a central portion of a shield frame, which is connected to a cutter frame so as to be integrally rotatable. A cylindrical body is projectingly provided on the surface portion, and a dummy jack pipe-connected so as to interlock with the opening adjustment jack of the dirt and sand intake slit formed in the cutter frame is installed in the cylindrical body, and the stroke position of the dummy jack is set. It has a configuration including means for setting.

[Operation] Therefore, since the slit opening adjustment jack and the dummy jack are interlocked, the stroke position of the slit opening adjustment jack is set when the stroke position of the dummy jack is set.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the bulkhead 3 is separated from the stiffening frame 2, the cutter shaft and the intermediate beam 7 are fixed to the bulkhead 3, and the cylindrical body 23 is attached to the rear surface of the bulkhead 3.
Attach the ring gear to the outer periphery of the rear part of the cylindrical body 23.
24 is provided, the pinion 13 of the motor 12 is engaged with the ring gear 24, and the outer periphery of the central portion of the cylindrical body 23 and the stiffening frame 2 are provided.
A bearing 25 is interposed between the inner periphery and a ring frame 26 provided on the outer periphery of the front portion of the cylindrical body 23, and an outer seal member is provided so as to close the gap between the stiffening frame 2 and the bulkhead 3.
Install 10.

In addition, the inner wall portion of the cylindrical body 23 is provided with a dummy jack 27 of the same specifications, which is interlocked with the slit opening adjustment jack 21.
As shown also in FIGS. 2 and 3, a number corresponding to the slit opening adjustment jacks 21 is arranged side by side through the bracket 28 in the circumferential direction, and at the rod protruding side of each dummy jack 27, An arc-shaped positioning plate 29 for setting the stroke position of each dummy jack 27 is arranged on the inner wall of the cylindrical body 23 so as to be movable in the axial direction, and the position of the positioning plate 29 is adjusted for each slit opening. Jack 27
Threaded rod 30 that penetrates in the intermediate position Nut that is screwed into the threaded rod 30
It is configured so that it can be set by tightening adjustment with 31. Further, a hydraulic power unit 32 for supplying pressure oil to these jacks 21, 27 and a cutter accessory device such as a copy cutter is mounted in the cylindrical body 23.

In FIG. 1, the same reference numerals as those in FIG. 5 indicate the same parts.

The interlocking system of the slit opening adjustment jack 21 and the dummy jack 27 is as shown in FIG. That is, one of the supply / discharge pipes 33 from the hydraulic power unit 32 is connected to the dummy jack 27.
Adjust the jack 21 to the rod pressing chamber of the
Of the dummy jacks.
The connecting pipe 35 connects the rod retracting chamber 27 and the rod retracting chamber of the adjustment jack 21. Incidentally, 36 is a hydraulic pump, 37 is a drive motor, 38 is a switching valve, 39 is a safety valve, 40 is a closed tank, and power is supplied to the hydraulic power unit 32 by a spring ring 41 provided at the axial center of the cylindrical body 23. It is done through.

With the above-described configuration, when the motor 12 is driven, the cylindrical body 23 is engaged with the bearing 25 through the engagement between the pinion 13 and the ring gear 24.
The bulkhead 3 which is integral with the cylindrical body 23 also rotates while being supported by the cutter frame 6 via the intermediate beam 7 and the cutter shaft 4.

Here, when adjusting the opening degree of the soil intake slit 20, as shown in FIG. 4, the rod of the adjustment jack 21 is first retracted to fully open the slit 20, and the rod of the dummy jack 27 is also retracted. Leave the end of the rod away from the positioning plate 29. Then, as shown in FIG. 3, the tightening adjustment of all the nuts 31 screwed to the screw rod 30 is performed, and the position of the positioning plate 29 is moved and set to the whole. Then, when pressure oil is supplied from the hydraulic power unit 32 to the rod pushing chamber of the adjustment jack 21 through the supply / discharge pipe 34, the opening / closing plate 22 is pushed out to close the slit 20, and at the same time, the rod of the dummy jack 27 is gradually pulled in. And stops when it comes into contact with the positioning plate 29. That is, the pressure oil extruded from the rod pull-in chamber of the adjustment jack 21 is supplied to the rod pull-in chamber of the dummy jack 27 through the communication pipe 35, and the rod of the dummy jack 27 is pulled in. Since the adjustment jack 21 and the dummy jack 27 have the same specifications, the movement amounts of both rods of the dummy jack 27 and the adjustment jack 21 are the same amount.
The opening degree of all slits 20 is surely adjusted corresponding to the amount set on the 27 side. On the contrary, when the slit 20 is opened, pressure oil is supplied to the rod pushing chamber of the dummy jack 27 via the supply / discharge pipe 33.

EFFECTS OF THE INVENTION As described above, according to the present invention, the stroke of each adjustment jack can be regulated by setting the rod stroke of the dummy jack so as to be regulated compulsorily. The excellent effect that the slit opening adjustment can be surely performed can be exhibited.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an embodiment of the present invention, FIG. 2 is an enlarged view in the direction II-II of FIG. 1, FIG. 3 is a partial enlarged view in the direction III of FIG. 1, and FIG. The figure is an explanatory view of the main part, FIG. 5 is a cut side view of a conventional shield machine, and FIG. 6 is a front view (right half) thereof. 1 is a shield frame, 2 is a stiffening frame, 3 is a bulkhead, 4 is a cutter shaft, 6 is a cutter frame, 7 is an intermediate beam, 20 is a slit, 21 is a slit opening adjustment jack, 27 is a dummy jack, 29 is Positioning plate, 30 is threaded rod, 31 is nut, 32 is hydraulic power unit, 33, 34
Is a supply / discharge pipe, and 35 is a communication pipe.

Claims (1)

[Claims] 1. A shield machine having a bulkhead arranged at a central portion in a shield frame and integrally rotatable with a cutter frame, wherein a cylindrical body is projected from a rear surface portion of the bulkhead. In the cylindrical body, a dummy jack pipe-connected so as to interlock with an opening adjustment jack of a dirt and sand intake slit formed in the cutter frame is installed, and means for setting a stroke position of the dummy jack is provided. Slit opening adjustment device for shield machine.