JPH0410318Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a bending device for a mid-fold type shield machine that enables a shield machine that excavates a horizontal shaft underground to perform a desired curved excavation with high precision. It is related to.

(Prior art) When excavating a horizontal shaft with a small curvature underground using a shield machine, if the length of the skin plate of the shield machine is greater than the cross-sectional diameter by one or more, the excavation must be performed while bending it to a predetermined curvature. is difficult.

Therefore, it is necessary to bend the shield machine itself by dividing the skin plate into front and rear parts in the direction of travel. Conventionally, such shield machines as shown in FIGS. 6 and 7 are known.

The shield machine shown in Fig. 6 has a skin plate 1
is divided into a front cylinder part 2 and a rear cylinder part 3, and the front end of the rear cylinder part 3 is bendably connected to the inner peripheral surface of the rear end of the front cylinder part 2 via a seal 5. Part 2, 3
Ring plates 6 and 7 are provided around the opposing inner peripheral surfaces of the
The cylinder parts of a plurality of adjustment jacks 14 are fixed in the circumferential direction of the ring plate 6 of the front cylinder part 2, and the rods thereof can come into contact with the other ring plate 7. A plurality of propulsion jacks 15 are attached, and the propulsion jacks 15 use the buried pipe 16 as a reaction force to move the front and rear cylindrical portions 2 and 3 forward as a unit.

Also, by adjusting the amount of mutual extension of the adjustment jacks 14, the front cylinder part 2 can be moved in any direction to the rear cylinder part 3.
It is made refractable to

FIG. 7 shows the shield machine shown in FIG. 6, except that an adjustment bolt 17 is used in place of the adjustment jack 14, and a propulsion jack 15 is provided between the front cylinder portion 2 and the buried pipe 16.

(Problems to be Solved by the Invention) Such a conventional shield machine has the advantage of being able to bend the front cylinder part 2 by an arbitrary amount with respect to the rear cylinder part 3; In the former case, when the hydraulic pressure supply to each adjustment jack 14 is locked to fix the expansion and contraction of the rod after the desired amount of deflection, the locking becomes insufficient during excavation propulsion by the entire shield machine. Sometimes,
There may be cases where the bending propulsion becomes unstable or the degree of bending must be adjusted frequently.

In the latter case using the adjustment bolt 17, it is necessary to measure and adjust the amount of expansion and contraction of the bolt each time, and there is a problem that the bending operation takes time.

The present invention provides a bending device for a folding type shield machine that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the bending device of the center-folding type shield machine of the present invention has a bending device that allows the skin plate 1 of the shield machine to be moved forward as shown in the drawing corresponding to the embodiment. In a bending device for a mid-fold type shield machine, which is divided into two parts, a cylindrical part 2 and a rear cylindrical part 3, and the front and rear cylindrical parts 2 and 3 are connected in a flexible manner and bent by a plurality of jacks. , a box in which ring plates 6 and 7 are fixed to the inner circumferential surfaces of opposing ends of the front and rear cylinder parts 2 and 3, and the inner parts of these ring plates 6 and 7 are opened 8a and 9a toward the inner circumference. A plurality of sets of shaped spacer member end receiving portions 8, 9 are fixed at predetermined intervals in the circumferential direction in a state of facing each other in the front and rear, and between the opposing surfaces of the receiving portions 8, 9 and the ring plates 6, 7. Through the openings 8a, 8b, the head 12 of the spacer member 12 is formed by integrally providing enlarged heads 12b, 12b at both ends of a shaft portion 12a having an appropriate length.
b, 12b respectively, and inserting the shaft portion 12a of the spacer member 12 into the receiving portions 8, 9 from the inner peripheral end surfaces of the ring plates 6, 7 or the inner end surfaces of the receiving portions 8, 9, It has a structure in which insertion and locking slots 10 and 11 are provided for locking.

(Function) After the front cylinder part 2 is turned to a desired degree of refraction with respect to the rear cylinder part 3 by the adjustment jack 14 or the propulsion jack 15, the opposing receiving parts of the front cylinder part 2 and the rear cylinder part 3 are moved. A spacer member 12 equal to the dimension between the receiving end surfaces of the receiving portions 8 and 9 is inserted between the receiving portions 8 and 9 and fixed at a predetermined bending degree, and then the front and rear cylinder portions 2,
3 to advance in a predetermined curve.

(Example) To explain the example of the present invention with reference to the drawings, 1
1 is a skin plate of a shield machine, which is divided into two parts approximately in the center to form a front cylinder part 2 and a rear cylinder part 3, and a small diameter ring body 4 is attached to the front end opening of the rear cylinder part 3. The ring body 4 is provided in a step-like manner and protrudes from the cylindrical part 3, and is fit into the inner circumferential surface of the rear end of the front cylindrical part 2 in a bendable manner via a water stop seal 5. Ring plates 6 and 7 are integrally fixed to the tip of the front cylinder part 2 and the rear inner circumferential surface of the front cylinder part 2, respectively.

Reference numerals 8 and 9 denote box-shaped spacer member end receiving portions that are fixed opposite to the front surface of the ring plate 6 of the front tube portion 2 and the rear surface of the ring plate 7 of the rear tube portion 3; A plurality of sets of stop portions 8 and 9 are provided at regular intervals in the circumferential direction of the ring plates 6 and 7 (in the figure, at four locations on the top, bottom, left and right).

The inner parts of these receiving parts 8, 9 are opened 8a, 9a toward the inner circumference, and the receiving parts 8, 9 are opened from the inner peripheral end surfaces of the ring plates 6, 7 in the openings 8a, 9a. Insertion locking slots 10 and 11 are provided toward the inside for inserting and locking the shaft portion of the spacer member.

Reference numeral 12 denotes a spacer member which is formed by integrally providing enlarged heads 12b, 12b at both ends of a shaft portion 12a that can be inserted into the insertion locking slots 10, 11. When performing curved excavation, the heads 12b, 12b A plurality of sets of spacer members with different lengths are used.

For example, if there are four receiving parts 8 and 9, the fifth
As shown in the figure, one long spacer member, two medium-length spacer members, and one short spacer member are used, and this is used as a set of multiple spacer members with different lengths. This is something to prepare in advance.

In addition, when performing straight-line digging, spacer members 12 of the same length are used for all the receiving portions 8 and 9.

Reference numeral 15 denotes propulsion jacks disposed at four locations at the top and bottom on both sides within the skin plate 1, whose cylinder portions are inserted into the ring plates 6 and 7 between the adjacent receiving portions 8, 8 and 9, 9. The bottoms of these cylinders are fixed to an annular receiving plate 18 provided around the front inner peripheral surface of the front cylinder part 2, and the rods are made to abut and receive on the end surface of the buried pipe 16.

With this configuration, when performing straight-line excavation, spacer members 12 of the same length are provided between the opposing receiving portions 8 and 9. The spacer member 12 is attached by inserting and locking the shaft portion 12a into the insertion locking slots 10 and 11 of the ring plates 6 and 7.

After this state is established, when the propulsion jack 15 is operated to extend the rod, the front cylinder part 2 moves forward using the buried pipe 16 as a reaction force, and the spacer head 12b is locked to the ring plates 6, 7. The rear cylindrical portion 3 moves forward together through the member 12 to perform straight-line excavation.

Then, the buried pipe 16 is replaced with a new propulsion jack 15.
When the propulsion jack 15 is retracted in order to be inserted into the rear side of the front cylinder part 2, the front cylinder part 2 is retracted. At this time, the spacer member 1 is attached to the opposing wall surfaces 8b and 9b of the receiving portions 8 and 9.
The two heads 12b, 12b are in contact with each other.

Next, when performing curved excavation, only the predetermined propulsion jack is operated to move the front cylinder part 2 to the rear cylinder part 3.
After bending by a desired angle, a spacer member 12 having a length of the shaft portion 12a equal to the dimension between the front surface of the ring plate 6 and the rear surface of the ring plate 7 in the opposing receiving portions 8 and 9 is sequentially attached. insert and intervene.

After this state is established, if the propulsion jack 15 is operated to extend the rod, the front and rear cylinder parts 2 and 2 are moved in the same manner as described above, with the front cylinder part 2 maintaining a predetermined bending angle with respect to the rear cylinder part 3. 3 move forward as one and perform curved excavation.

In the embodiments described above, the propulsion jack 15 is used to refract the front cylinder portion 2 and move the entire shield machine forward, but the same applies to the case where the degree of refraction is adjusted using a different jack.

That is, in FIG. 3, the adjustment jacks 14 are fixed to the upper and lower parts of both sides of the ring plate 6 of the front cylinder part 2, and the rods are brought into contact with the front surface of the ring plate 7 of the rear cylinder part 3. The front cylinder part 2 can be adjusted to a desired bending angle with respect to the rear cylinder part 3, and the plurality of propulsion jacks 15 are connected to the rear cylinder part 3.
The rod is inserted into and fixed to an annular support plate 19 provided around the central part of the rod, and the rod is brought into contact with the buried pipe 16, and the front cylinder part 2 is moved through the rear cylinder part 3 by the operation of these propulsion jacks 15. It is designed to move forward in an integrated manner. Further, a plurality of sets of receiving parts 8, 9 are fixed to the opposing surfaces of the ring plates 6, 7 of the front and rear cylinder parts 2, 3,
In this case, insertion locking slots 10 and 11 are provided on the opposing wall surfaces of these receiving portions for inserting and locking the shaft portion 12a of the spacer member 12 from the inner end, and the head portion 12b of the spacer member 12 is fitted with a ring. It is made to abut and receive on the opposing surfaces of the plates 6 and 7.

Other configurations and excavation modes are the same as in the previous embodiment.

(Effects of the invention) As described above, according to the bending device of the center-folding shield machine of the invention, the ring plate 6 is attached to the inner peripheral surface of the opposite end of the front and rear cylinder parts 2 and 3, which are formed by dividing the skin plate 1 into two. , 7 are fixed, and the inner parts of these ring plates 6, 7 have openings 8 facing inward.
A plurality of box-shaped spacer member end receiving portions 8, 9, which are shown in FIG. The openings 8a and 8b between the opposing surfaces of the
The heads 12b, 12b of the spacer member 12, which is integrally provided with enlarged heads 12b, 12b at both ends of a shaft portion 12a having an appropriate length, are inserted through the ring plates 6, 7, respectively. The shaft portion 12a of the spacer member 12 is inserted into the receiving portions 8, 9 from the inner peripheral end surface or the inner end surface of the receiving portions 8, 9.
This insertion locking groove 1 is provided with insertion locking grooves 10 and 11 for inserting and locking the
By inserting the shaft portion 12a of the spacer member 12 from 0 and 11, the enlarged heads 12b and 12b at both ends of the shaft portion 12a can be easily inserted into the box-shaped receiving portions 8 and 9 through the openings 8a and 8b. This makes it possible to easily and efficiently insert a plurality of spacer members 12 between the front and rear cylindrical parts 2 and 3 formed by dividing the skin plate 1.

At this time, by sequentially interposing spacer members 12 of different lengths between the box-shaped opposing receiving portions 8 and 9 provided in the circumferential direction, the front and rear cylindrical portions 2 and 3 are held at a predetermined degree of refraction. It can be fixed securely,
The degree of bending can also be easily set by the length of the spacer member 12 without measuring the degree of bending.
The front and rear end surfaces of b, 12b are received by the opposing surfaces of the ring plates 6, 7 and the receiving parts 8, 9, and the rear cylinder part 3
The shield machine can be accurately propelled with a predetermined degree of refraction while reliably transmitting the propulsive force from the side to the front cylinder part 2.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a vertical side view of Example 1, FIG. 2 is a vertical front view taken along line A-A, FIG. 3 is a vertical side view of Example 2, and FIG.
The figure is a longitudinal sectional front view taken along line B-B, FIG. 5 is a side view of the spacer member, FIGS. 6 and 7 are longitudinal sectional side views showing the conventional example, and FIGS. 8 and 9 are 6C - Longitudinal front view along C line and D-D line, No. 10
The figure is a longitudinal sectional front view taken along line E-E in FIG. 7. 1...Skin plate, 2...Front cylinder part, 3...
Rear cylinder part, 6, 7...Ring plate, 8, 9...
Reception part, 12... Spacer member, 14... Adjustment jack, 15... Propulsion jack.

Claims (1)

[Scope of utility model registration request] A skin plate 1 of a shield machine is divided into two parts, a front cylinder part 2 and a rear cylinder part 3, and these front and rear cylinder parts 2 and 3 are connected in a flexible manner and bent by a plurality of jacks. In the bending device of the folding shield machine, ring plates 6 and 7 are fixed to the inner peripheral surfaces of opposing ends of the front and rear cylinder parts 2 and 3, and
These ring plates 6, 7 are provided with a plurality of box-shaped spacer member end receiving portions 8, 9 having openings 8a, 9a facing inward in the circumferential direction at predetermined intervals in the circumferential direction. Enlarged heads 12b, 12b are attached to both ends of the shaft portion 12a having an appropriate length through the openings 8a, 8b between the opposing surfaces of the receiving portions 8, 9 and the ring plates 6, 7. The head 12b of the spacer member 12 integrally provided with
12b to intervene, and
Inner peripheral end surfaces of ring plates 6, 7 or receiving portions 8,
Spacer member 1 is inserted into the receiving portions 8 and 9 from the inner end surface of 9.
A mid-fold type shield bending device characterized in that insertion and locking slots 10 and 11 are provided for inserting and locking two shaft portions 12a.