JPH0315679Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a shield tunneling machine.

Conventionally, in the tunnel construction method using a shield tunneling machine, in order to easily perform curved construction, the main body 1 of the shield tunneling machine is divided into two parts, for example, a front trunk 1A and a rear trunk 1B, as shown in FIG. The body parts 1A and 1B are swingably connected to each other via connecting pins 2 at upper and lower central positions, and are further swingable by hydraulic cylinders 3 provided on both sides of the body. There is. However, a plurality of these hydraulic cylinders 3 are provided on the left and right sides of the main body, and are operated independently of each other. Therefore, when changing the direction of movement of the shield excavator, it is necessary to push and pull the left and right hydraulic cylinders 3. It was difficult to do both at the same time, and the disadvantage was that curved construction could not be done as desired. Further, an annular sealing material 5 is attached to a cylindrical fitting part 4 that protrudes from the rear body part 1B into the front body part 1A, but the body parts 1A and 1B are perpendicular to each other at their central positions. Because they are connected by the connecting pin 2, when constructing a curved line, one side of the sealing material 5 is compressed and the sealing material 5 is damaged quickly, and the other side of the sealing material 5 is separated from the mating body 1A. The drawback was that the sealing effect would be lost if they separated.

Therefore, the present invention provides a shield tunneling machine that can eliminate the above-mentioned drawbacks.

That is, the present invention divides the main trunk of the shield tunneling machine into a plurality of parts in the longitudinal direction of the axis, and connects these divided trunks to each other via horizontal connecting links so as to be able to swing from side to side. An inset part is provided in the part that protrudes into the other split body part, and an annular packing is attached to the outer periphery of the distal end of this inset part, and a guide ring having an outer diameter smaller than the annular packing is attached to the outer periphery of the inset part on the proximal end side of the annular packing. Hydraulic cylinders, one end of which is connected to one of the split trunks and the other end of which is connected to the other split trunk, are installed on the left and right sides of the main body of the shield tunneling machine, and one of the left and right hydraulic cylinders A shield excavator characterized in that the rod-side hydraulic piping of the other hydraulic cylinder is connected to the head-side hydraulic piping of the cylinder, and the head-side hydraulic piping of the other hydraulic cylinder is connected to the rod-side hydraulic piping of the one hydraulic cylinder. It is.

According to this configuration, when changing the traveling direction of the shield excavator, the left and right hydraulic cylinders can be used at the same time, unlike the conventional system in which the left and right hydraulic cylinders are operated separately, and therefore directional control can be ensured. can be done. Also,
The split trunks are swingably connected via a horizontal connection link, and a guide ring with an outer diameter smaller than the outer circumference of the annular packing is attached to the proximal side of the annular packing in the fitting part, so one of the split When the trunk swings relative to the other split trunk, the guide ring comes into contact with the inner peripheral surface of one split trunk, restricting the amount of mutual rocking of the split trunks, and reducing the amount of compression of the annular packing. does not exceed a certain level, and therefore does not significantly damage the annular packing. Furthermore, since the split trunks are connected via the horizontal connecting link, if the guide ring is in contact with one of the split trunks and one of the split trunks tries to swing, the horizontal connecting link will By swinging in a horizontal plane, one split barrel can be moved relative to the other split barrel while maintaining the appropriate amount of compression of the annular packing by the guide ring, and thus both split barrels can be moved. It is possible to prevent excessive force from being applied to the end.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 6.

Reference numeral 11 denotes a shield tunneling machine according to the present invention, and 12 denotes a main body body, which is two in the longitudinal direction of the axis of the shield tunneling machine 11 (note that the number of divisions is not limited to two, and may be three or more, for example. ), that is, the front body part 1
It is divided into a rear body part 2A and a rear body part 12B. 13 is a cutter head, 14 is a driving device thereof, 15 is a pressure chamber, 16 is an earth removal device, and 17 is a shield jack. The front body part 12A and the rear body part 12B are provided with brackets 18A and 18B at central upper and lower positions facing each other, and a horizontal connecting link 19 is provided between these brackets 18A and 18B via connecting pins 20A and 20B. The shield tunneling machine 11 is attached and connected to the shield tunneling machine 11 so that it can swing from side to side within a horizontal plane. Reference numeral 21 denotes a cylindrical fitting part protruding from the tip of the rear body part 12B into the front body part 12A, and a sealing mechanism of at least two stages is provided between the fitting part 21 and the front body part 12A. Ground water is prevented from entering the main body body 12 when the front body 12A swings. That is, the annular first packing 22 is attached between the outer circumference of the front end of the fitting part 21 and the inner circumference of the front body part 12A, and further the front body part 12
The annular chamber 24 formed between the annular second packing 23 attached between the inner periphery of the A rear end and the outer periphery of the fitting part 21 and the first packing 22 is filled with grease, and the front body part The connecting portion between 12A and rear body portion 12B is reliably sealed. Reference numeral 25 denotes a guide ring which is mounted on the outer periphery of the fitting portion 21 at a position substantially adjacent to the rear trunk section 12B side than the first packing 22 and whose outer circumferential diameter is slightly smaller than the outer circumferential diameter of the first packing 22. Therefore,
When the front body part 12A swings relative to the rear body part 12B, the front body part 12A swings relative to the fitting part 21, but at this time, the guide ring 25 attached to the outer periphery of the fitting part 21 moves to the front body part 12A. Since the first gasket 22 comes into contact with the inner circumferential surface of the first gasket 12A and restricts the amount of swing (movement) within the horizontal plane, the amount of compression of the first gasket 22 does not exceed a certain amount. Note that when the front body 12A attempts to further swing while the guide ring 25 is in contact with the front body 12A, the horizontal connection link 19 swings (tilts) in the horizontal plane, causing the guide ring 25 to move. The front body 12A can move relative to the rear body 12B while maintaining the appropriate amount of compression of the first gasket 22. That is, the front trunk 12A can escape from the rear trunk 12B, and no unreasonable force is applied to the opposing ends. 26 has one end connected to the front body part 12A and the other end connected to the rear body part 12B.
As shown in the schematic cross-sectional view of FIG.
(but not limited to) the front torso 1
2A is made to swing relative to the rear body portion 12B. As shown in the hydraulic circuit diagram in Figure 6,
Each of the left and right hydraulic cylinders 26A and 26B has one hydraulic pipe 2 on the head side and the rod side.
7A, 27B, 28A, and 28B, and the head side hydraulic piping 27A of the left hydraulic cylinder 26A and the rod side hydraulic piping 28B of the right hydraulic cylinder 26B are connected via a stop valve 29, and the hydraulic switching valve 30 is The rod-side hydraulic pipe 28A of the left hydraulic cylinder 26A and the head-side hydraulic pipe 27B of the right hydraulic cylinder 26B are connected to the A port via a stop valve 31, and are also connected to the B port of the hydraulic switching valve 30. ing. In addition, in Fig. 6, 32
3 is a hydraulic pressure supply pipe connected to the P port of the hydraulic switching valve 30, 33 is a hydraulic return pipe connected to the T port, and 34 is a relief valve.

Therefore, according to the above configuration, the shield excavator 1
1, for example, to the right, if the hydraulic switching valve 30 is switched to the position, the left hydraulic cylinder 26A pushes the front body part 12A, and the right hydraulic cylinder 26B pulls the front body part 12A, so that the The direction can be changed by swinging the front body section 12A to the right side. Further, by switching the hydraulic pressure switching valve 30 to a certain position, the front body portion 12A can be swung to the left. In addition, each of the above stop valves 2
9 and 31 are closed only when the vehicle is stopped. During the above-mentioned swinging, the front body part 12A is moved to the rear body part 12A.
It is possible to rotate and move horizontally in a horizontal plane with respect to B, and a guide ring 25 is provided in the fitting part 21
, the amount of compression of the first packing 22 can be maintained within an appropriate range even if the amount of rocking is large. In the above embodiment, the fitting portion 21 is provided on the rear body portion 12B side, but it may of course be provided on the front body portion 12A side.

[Brief explanation of the drawing]

Fig. 1 is an enlarged plan view of the main part of a conventional example, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is an overall vertical cross-sectional view, and Fig. 3 is an enlarged longitudinal cross-section of the main part. Figure, 4th
The figure is an enlarged plan view of the main parts, FIG. 5 is a cross-sectional view of the arrangement of hydraulic cylinders, and FIG. 6 is a hydraulic circuit diagram of the same. 11... Shield excavator, 12... Main body body,
12A...Front body part (divided body part), 12B...Rear body part (divided body part), 18A, 18B...Bracket,
19...Horizontal connection link, 20A, 20B...Connection pin, 21...Inset part, 22...First packing, 25...Guide ring, 26...Hydraulic cylinder, 26A...Left hydraulic cylinder, 26B
...Right side hydraulic cylinder, 27A, 27B...Head side hydraulic piping, 28A, 28B...Rod side hydraulic piping, 30...Hydraulic pressure switching valve.

Claims (1)

[Scope of utility model registration request] The body of the shield tunneling machine is divided into a plurality of parts in the longitudinal direction of the axis, and these divided parts are connected to each other via a horizontal connection link so as to be swingable from side to side,
One of the split trunks is provided with a fitting part that protrudes into the other split trunk, and an annular packing is attached to the outer periphery of the distal end of the fitting part, and an annular packing is attached to the outer periphery of the fitting part on the proximal side of the ring packing. A guide ring with a small diameter is attached, and hydraulic cylinders, one end of which is connected to one of the split trunks and the other end of which is connected to the other split trunk, are installed on the left and right sides of the main body of the shield tunneling machine. The head-side hydraulic piping of one of the hydraulic cylinders is connected to the rod-side hydraulic piping of the other hydraulic cylinder, and the rod-side hydraulic piping of one of the hydraulic cylinders is connected to the head-side hydraulic piping of the other hydraulic cylinder. A shield tunneling machine.