JP3076271B2 - Connection device for front fuselage of separate shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention, before the body before having rotatably cutter disc at the tip to the rear cylinders adjacent refractive freely linked plurality of separate type shield machine
The present invention relates to a connecting device for a front trunk for connecting the trunks in a separable manner.

[0002]

2. Description of the Related Art For example, a shield machine disclosed in Japanese Patent Publication No. 4-11718 has at least two rear bodies in which a front body provided with a cutter disk is swingably (oscillated) with respect to the rear body. While turning the shield excavator, turning the shield excavator and excavating the tunnel where the two circles overlap. , The direction of which can be changed. Conventionally, in this type of shield machine, there has been no idea of performing the excavation work by completely separating each machine, so that the machine is not separated. For this reason, if separation is to be performed, the ground around the excavator to be separated is improved by injecting chemicals, etc., and then the worker goes out of the machine and moves between the rear torso or rear torso of the shield excavator and the front torso. It is necessary to remove the spacer between them and to perform water stoppage treatment by covering the hole for the connecting tool remaining in the rear trunk or the front trunk, so that each excavator can be separated for the first time .

As a prior art, there is a connection device described in Japanese Utility Model Publication No. 7-54395. This device is a straight-body type 2
A penetrating hole provided in the rod of the connecting jack, with a connecting jack extendable and retractable from one of the shield excavators toward the other excavating machine and inserted into the inside, and a fixing jack built into the other excavating machine is provided on the rod of the connecting jack And the connection jack is contracted to integrate both shield machines.

[0004]

The conventional connecting device described in the above publication has problems to be solved in the following points. That is, the two shield excavators are integrally connected by the connecting jack using the union jig as a spacer, so that both can be kept at a fixed interval, but a seal mechanism is provided between the union jig and the excavator. Since they are not provided, even when they are integrally connected, there is a possibility that high-pressure water or earth and sand from the ground may enter the inside of the excavator during excavation work. For this reason, it is difficult to separate the excavator in the ground under high pressure.

When the two shield excavators are separated from each other, high-pressure water or earth and sand from the ground penetrates into the excavator from a hole for projecting or inserting the connecting jack. It is conceivable to attach a lid to each hole, but the structure is not such that the lid can be attached around the hole before the connection jack is pulled in.

[0006] Since each shield machine is a straight-body machine without a folding mechanism, the shield machine is connected to a shield machine in which a front body provided with a cutter disk is swingably connected to a rear body. It is impossible to apply it as it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is directed to a plurality of separate shield excavators adjacent to each other in which a front body having a cutter disk rotatably provided at a tip thereof with respect to a rear body is flexibly connected. Front fuselage for connecting separably between the trunks under high pressure under the ground while preventing intrusion of groundwater and sediment
It is intended to provide a connection device for use .

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a connection for a front body of a separate shield machine according to the present invention is provided.
The device is located between the front shells of the adjacent separated shield machine.
It has an arc surface that can be held at a predetermined interval and can be joined to the front trunk.
And a pair of slides having sliding surfaces that are slidably joined to each other.
Penetrate through the skin plate of each front body,
A screw hole located in the screw hole provided in the spacer;
Arc formed in the center of the spacer
A curved oval or circular hole and said oval or circle
A space penetrated through each of the spacers separately from the hole
Penetrate through the skin connection holes and the skin plate of each front body,
A through hole leading to an oblong hole or a circular hole of the spacer;
Oval or circular hole and a pair of spacers
A series of holes are penetrated through the hole, and the adjacent shield is excavated
A coupling for connecting the front fuselage of the machine so as to be relatively tiltable,
Screwed into the screw hole from the inside of the front trunk and inserted,
Tighten the spacer by screwing it into the screw hole of each spacer
An attachment, interposed between the outer surface of each of the spacers and each of the front bodies.
And an annular seal portion surrounding all the screw holes
Between the pair of spacers and the pair of spacers.
Or around the circular hole and the hole for connecting the spacer
A seal ring .

According to the connecting device of the present invention having the above-described structure, a plurality of front bodies can be connected to the rear body so as to be tiltable.
And can be separated by the following simple work procedure.
You. That is, the connecting bolt is inserted into each spacer connecting hole.
Screw the nut through and tighten
The spacers are connected together. Rotate the coupling to the head side
In this state, the seal ring between the spacers
Shields from oval or circular holes as it functions
Intrusion of high-pressure water or the like into the excavator is prevented. Lid (water stoppable
Rate) around the hole from which the fitting was removed,
Close each hole. Next, rotate the fasteners to secure the spacers.
Remove the tip of the fastener from the hole
Hold the fastener with the screw hole screwed into it, and remove the screw with the fastener.
The screw holes on the plate. And all fasteners
By pulling it out from the bolt hole (screw hole) of the spacer
And a pair of integrally connected spacers
Is separated from the front fuselage, and the shield machine is separated
So that tunnel excavation work can be performed independently of each other
become. At the time of separation in this way, the front body required for connection
Holes are closed with lids (water stoppage plates) or fasteners.
Intrusion of high pressure water and earth and sand from
So each shield machine is independent of the tunnel
Excavation work can be performed. This simple working hand
The front body of the shield machine can be separated in this order.
Time is greatly reduced, and
Since no work is required, the costs are considerably reduced.

According to a second aspect of the present invention, each of the front body
Around the screw hole on the inner peripheral surface of the
When the shield machine is separated around the hole,
Water blocking plate for closing each of the through holes
It is more desirable to provide a flat portion for attaching a fastener .

According to the connecting device of the second aspect, at the time of disconnection
Has a lid (water stoppage plate) on the front torso required for connection
Or high pressure water or earth and sand from the holes.
It is really blocked.

[0012]

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a connecting device for a shield type shield machine according to the present invention.

FIG. 1A is a perspective view schematically showing a state where two shield excavators are connected, and FIG. 1B is a perspective view schematically showing a state where two shield excavators are separated. 2
3 is a central longitudinal sectional view of the shield machine shown in FIG. 1 in a connected state, and FIGS. 3 to 5 show a connecting device on the rear trunk side of the shield machine according to the embodiment of the present invention. FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2, FIG. 3B is an enlarged sectional view showing another embodiment, FIG. 4 is a sectional view taken along line BB of FIG. 3, and FIG.
5 (b) is an enlarged sectional view of the shield machine in a separated state.

As shown in FIGS. 1A and 2, in this example, two separate shield excavators 1 are connected by a connecting device 11.
・ 1 is connected. Each shield machine 1 has a known structure, and a front body 2 is connected to a cylindrical rear body 3 so as to be able to bend (bend) freely, and a cutter disk 4 is rotatably supported at the tip of the front body 2. I have. The cutter disk 4 is rotated via a speed reduction mechanism by a plurality of drive motors 5 arranged at intervals in the circumferential direction. A plurality of shield jacks 6 are arranged rearwardly at intervals in the circumferential direction on each rear trunk 3, and extend by pressing the shield jacks 6 against a segment wall S assembled by an erector (not shown). To move forward. The angle of refraction of the front body 2 with respect to the rear body 3 is maintained at a predetermined angle by a plurality of not-shown center bending jacks interposed between the front body 2 and the rear body 3. You.

Each of the shield excavators 1 and 1 has a rear trunk 3
The three bodies 3 are integrally connected by the connecting device 11, but the front body 2 is connected to the rear body 3 by a second connecting device 41, which will be described later, such that the front body 2 can swing freely within a predetermined angle range. The second connection device 41 is desirably provided, but can be omitted because the center bend jack can maintain the front body 2 at a fixed interval.

The connection device 11 has the following configuration. That is, as shown in FIG.
3) A spacer 12 having a joint surface 12a curved in an arc shape on both sides according to the outer peripheral surface of the third skin plate 3a. In the spacer 12, as shown in FIG. 4, through holes 13 are formed in the thickness direction so as to penetrate the two coupling members 15 at front and rear intervals on the center line in the width direction. . Also, the spacer 1 of each skin plate 3a
2 at the position corresponding to the through hole 13
Are formed in the thickness direction. Then, on the inner peripheral surface of each skin plate 3a, around the through holes 14, a water stop plate (lid) 16 described later can be easily attached by welding or the like at the time of separation, and the through holes 14 can be securely closed. Is formed on the flat portion 3b. Coupler 15 is a bolt-like member having a head 15a to the proximal end, and threaded portion 15b is formed only on the tip, consisting of structural tightening screwed a nut 15c in the engaging part 15b . In addition, the coupling device 15 may use a hydraulic cylinder. In this case, as shown in FIG. the cylinder 61 is arranged, by pivoting the distal end portion of the cylinder rod 61a, pivotally mounted a locking piece 62 projecting on both sides from the peripheral wall of the cylinder rod 61a, the hydraulic cylinder 61 of the cylinder rod 61a shield machine The hydraulic cylinder 61 is contracted by inserting the locking pieces 62 into the rear body 3 through the through holes 13 and 14 and locking the locking pieces 62 to the flat portions 3b. 1 can be integrally connected to each other.

Further, in the vicinity of the peripheral edge of each joint surface 12a of the spacer 12, in this example, as shown in FIG. 4, a penetrable end of a fastening bolt (fastening tool) 17 can be screwed into each corner. a bolt hole (screw hole) 18 is respectively bored not, their bolt holes 18 so as to surround completely, including the two through holes 13, substantially rectangular annular groove 19 is formed, the annular groove 19 An annular seal member 20 is fitted so as to partially project outward. Furthermore, each skin plate 3a
At positions corresponding to the bolt holes 18 of the spacer 12, bolt holes (screw holes) 21 that penetrate the skin plate 3 a in the thickness direction and screw with the bolts 17 are formed. Around the bolt holes 21 on the inner peripheral surface of each skin plate 3a, a head 17a of the tightening bolt 17 is provided.
Are formed on the flat portion 3c so as to be surely in contact therewith. The flat portion 3c can be formed by fixing a member 22 separate from the skin plate 3a to the skin plate 3a by welding or the like as shown in FIG. 5, so that the vicinity of the outlet of the bolt hole 18 can be formed. When the annular recess 23 is formed and the seal ring 24 is fitted therein, the processing becomes easy.

As described above, the connection device 11 of the present invention
Is constructed, but the connection device 11 of this example is separated by the following procedure.

(1) In FIG. 3A, after the nut 15c of the coupling 15 is removed by rotation, the coupling 15 is moved to the head 1
Remove to 5a side. In this state, since the annular seal member 20 is functioning, intrusion of high-pressure water or the like from the through holes 13 and 14 into the shield machine 1 is prevented.

(2) Water stop plate 16 (see FIG. 3A)
Is attached to the flat portion 3b around the through hole 14 from which the coupling 15 has been removed by welding to close the through hole 14.

(3) The tightening bolt 17 is rotated, and the rotation is stopped in a state where the tip end of the tightening bolt 17 is removed from the bolt hole 18 of the spacer 12. Even in this state, the seal ring 24 is functioning and may be left as it is, but desirably, the seal welding 17c is applied between the opening peripheral portion of the bolt hole 21 and the tightening bolt 17 as shown in FIG. . And
If the fastening bolt 17 projecting into the rear trunk 3 is in the way, the projecting portion is cut off.

(4) As described in (3) above, by removing all the tightening bolts 17 from the bolt holes 18 of the spacer 12 by rotating them, the spacer 12 is separated from the shield machine 1 The excavators 1 and 1 can independently perform tunnel excavation work. The detached spacer 12 is left in the ground and is not normally collected.

Next, an embodiment of the connecting device 41 on the front body 2 will be described with reference to the drawings. FIG. 6 shows DD in FIG.
7 is a sectional view taken along the line EE of FIG. 6, and FIG. 8 is a sectional view showing a portion F of FIG. 6 in a separated state of the shield machine.

As shown in FIG. 6, the connecting device 41 includes a pair of spacers 42 having a joint surface 42a curved in an arc shape on the outside according to the outer peripheral surface of the skin plate 2a of the front body 2. Each spacer 42 has a flat sliding surface 42b which is slidably joined to each other inside. An oval hole (also referred to as an oval hole) 43 curved in an arc shape as shown in FIG. 7 is formed at the center of one of the spacers 42 (upper side in FIG. 6), and the other (lower side in FIG. 6). A circular hole 43 ′ is formed in the center of the spacer 42, and the fastener 4 penetrating through the circular hole 43 ′
4 is slidably inserted along the inner peripheral edge of the oblong hole 43. In the present embodiment, the connecting tool 44 is used as the connecting tool 15 (FIG. 3).
(a)), an oval hole 45 corresponding to the oval hole 43 is provided on one of the skin plates 2a (upper side in FIG. 6).
In the other (lower side of FIG. 6) skin plate 2a, circular through holes 45 'corresponding to the circular holes 43' are respectively formed in the skin plate 2a. A flat portion 2b is provided around the through hole 45 '.
Are provided respectively. Each spacer 42 is fixed to the front body 2 by four fastening bolts 46. A flat portion 2c is provided around a bolt hole 48 inside the skin plate 2a. Is formed with a non-penetrating bolt hole 47 into which the tip of the tightening bolt 46 can be screwed. Further, an annular groove 49 is formed in a peripheral portion of the joint surface 42a of each spacer 42, and an annular seal member 50 is fitted in the annular groove 49 so that a part thereof projects outward.

The main difference between the connecting device 41 and the connecting device 11 is that a pair of spacers 42 are slidably joined on a sliding surface 42b as shown in FIG. An annular groove 51 is formed in the peripheral portion of the sliding surface 42b), and a seal ring 52 such as an O-ring, which is hard and has a sealing action, is fitted therein. Also, since the pair of spacers 42 need to be integrally connected when the shield machine 1 is separated, a pair of small-diameter insertion holes 53 sandwiching the oblong hole 43 or the circular hole 43 ′ as shown in FIGS. Has been drilled. A large-diameter insertion hole 54 is formed from the joint surface 42 a side of the spacer 42 toward the small-diameter insertion hole 53, and an end of the small-diameter insertion hole 53 is opened at the bottom end of the insertion hole 54. An opening 55 having the same diameter as the insertion hole 54 is formed at a position corresponding to the insertion hole 54 of the skin plate 2a, and a flat portion 2d is formed around the opening 55 inside the skin plate 2a. At least one of the flat portion 2d and the bottom end of the insertion hole 54 is provided with a water stop plate 56.5.
When 7 is detachably attached with a set screw, it is safer for normal water stoppage.

In the connecting device 41 of the present embodiment configured as described above, as shown in FIG. 6, the front body 2 of the shield machine 1 is connected by the connecting tool 44 penetrating the oval hole 43, and the spacer At 42, it is held at a predetermined interval. In order to generate a rolling force on the shield machine 1.1, a pair of spacers 42 are provided on the sliding surfaces 42b so that the directions of the front body 2 can be shifted in opposite directions.
And sealed by a seal ring 52 to prevent entry of high-pressure water or the like from the oblong holes 43, 45 or the circular holes 43 ', 45'.

Subsequently, the connection device 41 is separated by the following procedure.

(1) In FIG. 6, the water stop plates 56.5
7 is removed from the flat portion 2d and the bottom end of the insertion hole 54.
Note that the water stop plates 56 and 57 may or may not be attached.

(2) As shown in FIG. 8, a pair of spacers 42 are integrally connected by inserting a connecting bolt 58 into each small-diameter insertion hole 53, screwing a nut 59, and tightening. Further, a water blocking plate 57 is attached to the flat portion 2d of the skin plate 2a to close the opening 55.

(3) In FIG. 6, the nut 44 of the coupling tool 44 is used.
After rotating and removing the coupling c, the coupling tool 44 is moved to the head 44a.
Pull out to the side. In this state, since the seal ring 52 is functioning, entry of high-pressure water or the like into the shield machine 1 from the oblong hole 43 or the circular hole 43 'is prevented.
The water stop plate 60 is inserted into the oblong hole 4 from which the fastener 44 has been removed.
5 and the flat portion 2b around the circular through hole 45 'is attached by welding to close the holes 45 and 45'.

(4) The tightening bolt 46 is rotated, and the rotation is stopped in a state where the tip of the tightening bolt 46 has come off from the bolt hole 47 of the spacer 42. Desirably, seal welding is performed between the periphery of the opening of the bolt hole 48 and the tightening bolt 46 (FIG. 5).
(See (b)) and tightening bolts 46 protruding into front barrel 2.
Cut off the protruding part of.

(5) As described in the above (4), all the tightening bolts 46 are rotated out of the bolt holes 47 of the spacer 42 and pulled out, so that the integrally connected spacers 42 are removed.
42 is detached from the shield excavator 1.1, and the shield excavators 1.1 are separated from each other so that the tunnel excavation work can be performed independently. The detached spacers 42 are left in the ground and are not normally collected.

Although an example of the connecting devices 11 and 41 of the present invention has been described above, the present invention can be implemented as follows.

(A) Tightening Bolt 17 and Tightening Bolt 46
Has been described as an example in which the spacers are provided at the four corners of the spacers 12 and 42. However, if the spacers can be stopped for sealing, the number may be smaller, and the number of both fastening bolts 17 and 46 may be increased, respectively. The pitch may be narrowed and provided at equal intervals on the periphery.

(B) Each water stop plate 16, 56, 57, 6
No. 0 can be attached to the flat portions 2b, 2d, 3b by screwing, for example, with a sealing member interposed, without welding.

(C) As described above, the connecting device 41 can be omitted.
And the oval through-holes 45 are also provided in the skin plates 2a on both sides, whereby the length of the oval arc can be reduced to about half.

(D) The case where the number of shield excavators 1 is two has been described as an example.

[0039]

As is apparent from the above description,
ADVANTAGE OF THE INVENTION The front body connection device of the separation type shield machine according to the present invention has the following excellent effects.

(1) A plurality of front bodies are connected to the rear body so as to be tiltable.
It can be connected, and, like the connecting device of the first aspect, can be easily separated.
It can be done efficiently with a simple work procedure and the front fuselage of the shield machine is separated.
Because the separation time can be greatly reduced
In both cases, no work such as ground improvement is required,
The use is also considerably reduced.

(2) The front body connecting device according to claim 2 is a
At the time of detachment, the hole of the rear trunk required for connection is a lid (water stop plate)
Alternatively, it is closed with a fastener and a seal ring,
Intrusion of high-pressure water and earth and sand is reliably prevented.

[Brief description of the drawings]

FIG. 1A is a perspective view schematically showing a state in which two separate shield excavators are connected, and FIG. 1B is a schematic view showing a state in which two shield excavators are separated. It is a perspective view.

FIG. 2 is a central longitudinal sectional view of the shield machine shown in FIG. 1 in a connected state.

3 shows a connection device on the rear trunk side of a shield machine according to an embodiment of the present invention. FIG. 3 (a) is an enlarged sectional view taken along line AA of FIG. 2, and FIG. It is an expanded sectional view which shows an Example.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

5 (a) is an enlarged sectional view of a portion C in FIG. 3, and FIG. 5 (b) is an enlarged sectional view of the shield machine in a separated state.

FIG. 6 is an enlarged sectional view taken along the line DD of FIG. 2, showing a connection device on the front trunk side of the shield machine according to the embodiment of the present invention.

FIG. 7 is a sectional view taken along line EE of FIG. 6;

8 is a cross-sectional view showing a portion F of FIG. 6 in a separated state of the shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Separation type shield excavator 2 Front trunk 3 Rear trunk 2a ・ 3a Skin plate 2b ・ 2c ・ 2d ・ 3b ・ 3c Flat part 11.41 Connecting device 12.42 Spacer 13.14 Through hole 15.44 Coupling tool 16.56・ 57 Water stop plate (lid) 17.46 Tightening bolt (Tightening tool) 18.21 ・ 47 ・ 48 Bolt hole (Screw hole) 19 ・ 49 Annular groove 20 ・ 50 Seal member 43 ・ 45 Oval hole 43 ′ · 45 'circular (through) hole 52 seal ring (seal member) 53 · 54 insertion hole 55 opening

Claims (2)

(57) [Claims] 1. In front of an adjacent separated shield machine
An arc that can hold the body at a predetermined distance and can be joined to the front body
Surfaces having sliding surfaces that are slidably joined to each other.
Penetrate the pair of spacers and the skin plate of each of the front bodies, and
A screw hole located in the provided screw hole, and a circle formed through the center of the pair of spacers.
An oblong hole or a circular hole curved in an arc shape, and
Or through the spacers separately from the circular holes.
Through the spacer coupling holes and the skin plate of each front body,
A pair of spacers, the through-hole leading to a hole or a circular hole;
Series through the oval or circular hole and the through hole
And the front fuselage of the adjacent separated shield machine is
A coupling tool that is connected to be able to tilt freely, and is inserted by being screwed into the screw hole from the inside of the front body,
Tighten the spacer by screwing it into the screw hole of each spacer
A fastener that said is interposed between the outer surfaces of each spacer and each of the front torso, all
An annular sealing member surrounding the periphery of the screw hole and the pair of spacers, the oval hole or
Seals around circular holes and spacer coupling holes
In front of a separable shield machine, comprising: a ring;
Connection device for trunk . 2. An inner peripheral surface of each skin plate of the front body.
Shield around the screw hole and around the through hole.
Each time the excavator is separated, the screw hole and the through hole
Attach a water stop plate or fastener to block
2. The separation type shield machine according to claim 1, wherein a flat portion is provided.
Front torso connection device.