JPS6070298A - Overcutter of shield drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an overcutter device for a shield tunneling machine, and more particularly, the present invention relates to an overcut device for a shield tunneling machine, and more specifically, it relates to an overcut device for a shield tunneling machine, and more particularly, it relates to an overcut device for a shield tunneling machine, and more particularly, it relates to an overcut device for a shield tunneling machine. Concerning an overback device for an excavator. This is used in the field of making the shield tunneling machine smoothly move forward when excavating tunnels.

(b) Prior Art As shown in FIG. 1 Ca) and (b), the overcutter device 2 of the conventional shield excavator 1 has an overcutter 3A
and 3B are mounted so as to move forward and backward in the radial direction of the cutter disk 4. The overcutter moves forward and backward through cutter jacks 5A and 5B, as shown in FIG. That is, open the manual stop valves v1 and v2, and
3. Close V4, let the hydraulic oil from the electromagnetic switching valve (not shown) flow in the direction of arrow 6, and flow the hydraulic oil into the rond side chamber 7a of the stroke jacks 7A and 7B, and then the 7d side chamber 7b.
The hydraulic oil is caused to flow into the head side chamber 5b of the cutter jack 5A via the swivel joint 8.

The hydraulic oil in the rond side chamber 5a flows out in the direction of the arrow 9, and the canter jack 5A extends, moving the overcutters 3A and 3B to the outside of the cutter disk 4, as shown by the imaginary lines in FIGS. 1(a) and 1(b). Let's advance.

In this configuration and operation, the stroke jack 7A is installed in the operator's cab 1° as shown in Fig. 1(a), so the operator can move the piston ron of the stroke jack 7A (see Fig. 2). By means of the pointer 11 and scale plate 12 attached to the door c, it is possible to confirm the advance amount δ of the overcuck 3A shown in FIG. , the cutter jacks 5A and 5B contract and the overcuts 3A and 3A retreat, the hydraulic oil in the head side chamber 5b flows out and flows into the head side chamber 7b, and the hydraulic oil in the rond side chamber 7a flows out and closes the piston. The pointer 11 of the rod 7c moves, allowing the operator to confirm the entry of the overcutters 3A and 3B.

If the overcut 3A or 3B is advanced as described above and the cutter disk 4 of the shield excavator 1 is rotated, the face 14 is excavated with the face cutter 13, as shown in FIGS. 1(a) and (b). Moreover, it is possible to overcut the other pile 15 and provide a space 17 on the side of the excavator main body 16 necessary for turning. In addition, in such a conventional overcutter device, the amount of overcut of the space 17 required for curve advancement is about 50 to 100 mm, so there is no need to adjust the amount of advancement of the overcutter, and a constant amount of advancement is sufficient. It can serve as an overcut.

However, with a shield tunneling machine that makes sharp turns, the space on the sides of the machine body is wide (if it curves, it will be impossible to make that curve, so the overcut amount needs to be about 300 mm, for example, and the reverse When it is necessary to advance the overcutter gradually, the amount of advance of the overcutter must be changed in small increments, for example, to 100 mm or 150 mm. are IJ and Ild, and therefore two types of overcutter devices, one for rapid curve advancement and one for gradual curve advancement, have to be installed together, resulting in a problem that the structure becomes complicated and expensive.

Furthermore, when performing one-side or both-side copy sets as shown in Figures 10(a) and (b),
Conventionally, overcutting has been performed by switching the above-mentioned electromagnetic switching valve using a cam device or the like to move the overcutter forward and backward at a desired position, but this drive method makes it difficult to excavate the space on the side of the excavator body. This may result in a situation where the turning progress in the desired direction is ++++tr.

(C) Purpose of the Invention The present invention has been made to solve the above-mentioned problems.Seals 1 - Seals that are necessary on the sides of the excavating machine body when the excavating machine turns left and right or diagonally. In order to secure the appropriate space, you can adjust the amount of advance of the overcutter during overbaka/nod, and also move the overbaka/vine back and forth accurately at the desired position to create the necessary space.
Accurately secure the two areas and make the progression a circle? An object of the present invention is to provide an overcutter device for a shield tunneling machine that can reduce the

(d) Structure of the Invention The structure of the first invention will be explained based on the drawings.Cutter jaws 5A and 5B are expanded and contracted by hydraulic oil supplied through electromagnetic switching valves 21Δ and 21B shown in FIG. Stroke jacks 7A and 7 are installed in the hydraulic circuit 18.
Cutter jacks 5A and 5B that expand and contract according to the expansion and contraction operation of I3 are interposed, and removable spacers 29A to 29C shown in FIGS. This is an overcutter device for a shield tunneling machine that is designed to be fitted.

In addition to the configuration of the first invention, the configuration of the second invention includes an encoder plate 4 shown in FIG. 7 that rotates together with the cutter disk.
0 and a photo-inverter 46 are provided, and the opening/closing timing of the electromagnetic switching valves 21A and 21B can be determined by the detection signal of the photo-inverter 46 as the cutter disc rotates. It is a device that overburdens the shield tunneling machine.

(e) Examples Hereinafter, the first invention will be explained with reference to the drawings of the examples.

Figure 3 shows a cutter jack 5A that moves the overcutter forward and backward.
In the hydraulic circuit 18 of 5B, a hydraulic source 19, an accumulator circuit 20 that supplies hydraulic oil when hydraulic oil is insufficient, electromagnetic switching valves 218, 2113, and stroke jacks 7A, 7B.
It consists of manual stop valves v1, v2, v3, v4, and a swivel joint 8 whose details are shown in FIG. The swivel joint 8 is fixed so that its outer cylinder 8A can rotate together with the cutter disk 4, aligned with the center line of the cutter disk 4, and the cylinder 8B is slidably fitted into the outer cylinder 8A,
2 (Supported by a solid bearing 22. Outer cylinder 8 Al round cylinder oil passages 23a to 23d are bored and the sliding inner surface 8
Annular oil passages 242 to 24d are carved throughout the entire area a. Oil passages 25a to 25d bored in the inner cylinder 8B are in communication with the oil passages 24a to 24d at the time, and are connected to the pipe line 26a.
~26d to the stop valves v1 and v2, respectively. 29Δ, 29 shown in FIGS. 5(a) to (e)
I3 and 29C! These spacers have various length dimensions, each of which is formed of a cylindrical body split into two parts, and are suitable for use with the piston rod of the stroke gear 7A, 713 shown in FIG.
After fitting into the throats 7e and 7f, they are connected to the flange portions (not shown) by means of a mill 1 to the like. Note that the spacers 29A to 29C have different length dimensions, and are used in combination with spacers of other dimensions as necessary.

According to the embodiment described above, the operation can be performed as follows.

As shown in FIGS. 1(a) and 1(b), when it becomes necessary to make the shield tunneling machine 1 turn around and provide a space 17 on the side of the machine body 16, the overcutter of each overcutter device 2 is For example, to advance 3Δ, first open the stop valves v1 and v2 shown in FIG. 3, close the stop valves v3 and v4, and energize the solenoid 21a of the electromagnetic switching valve 21Δ to set it to the M position. Hydraulic source 19 and accumulator circuit 20
The hydraulic oil flows through the pipe 30 in the direction of arrow 31, flows into the rod side chamber 7a of the stroke jack 7A, and moves the piston rod 7e in the direction of arrow 32, and the hydraulic oil in the head side chamber 7b flows through the stop valve. V2 flows into the pipe 2.6a shown in FIG.
Through the oil passage 25a of B, the annular oil passage 24a of the outer cylinder 8A and the oil passage 2321 are <-H, and flow into the head side chamber 5b of the cutter jack 5A (not shown in FIGS. 3 and 6), and the piston rod 5e. is moved in the direction of arrow 33. At the same time, the hydraulic oil in the rod side chamber 5a flows through the passages 23b, 24b, 25b of the swivel joint 8, the pipeline 26b, and the stop valve v1 in the direction of the arrow 36 through the pipeline 35, and returns to the oil tank 37. Therefore, the overcut 38 shown in FIGS. 1(a) and 1(b) advances to the outside of the excavator main body 16 and overcuts the ground as the cutter disc 4 rotates. At this time, in order to obtain the advance amount δ of the overcutter 3Δ necessary for the shield tunneling machine 1 to move forward, spacers assembled as appropriate as shown in FIGS. 5(a) to 5(e) are attached to the piston rod 7e. 6
As a result, as shown in FIG. 5(C), the stroke of the stroke jack 7A is limited to L-β3 by the spacer 29C, and the advancing amount δ of the overcutter 3A is In this way, the amount of extension of the cutter jack 5A is limited in various ways each time, so the amount of advancement δ of the overcutter 3A can be set to a desired value. If the opening/closing timing of the
As shown in (C), an overcut space 17 can be secured in a desired area. In addition, when a large advance amount is required as shown in Figure 10 (C), for example, (
By sequentially changing the spacer from a) to (e) and repeating the overcut each time, it is possible to achieve the predetermined amount of overcut, and also check the dimensions of the spacer fitted to the stroke jack 7Δ. This allows the operator to indirectly know the amount of advance of the overcutter 3A. By the way, the distance is 300mm! ■ 50 fights, p
2 to 100mm,,j! 3 is set to 150 mm, the reduction amount of the stroke jack 7A, that is, the extension amount of the cutter jack 5A, is 50 mm, 100 mm, 15
0mm, 200mm, 250mm, 300mm
The advancing amount δ of the overcutter 3A can be set to one of the above values depending on whether the shield tunneling machine 1 advances sharply or slowly. After completing the overcut,
When the overcutter 3A is moved back into the cutter disk 4, the solenoid 21b shown in FIG. 3 may be energized to set the electromagnetic switching valve 21A to position N.

In addition, if there is a stroke misalignment between the piston rods of the stroke jack 7A and cutter jack 5A due to secondary oil in the stroke jack 7A or during initial operation, in other words, if the zero points do not match, , the stop valves v1 and v2 are opened, and the stop valves v3 and v4 are closed to excite the solenoid 21b, causing the hydraulic oil to flow into the rod side chamber 5a and moving the piston rod 5e to the zero position. Next, close the manual stop valves v1, v2, and v4 and open the manual stop valves v3 to drain the hydraulic oil into the head side chamber 7 of the stroke jack 7A.
b, and the piston rod 7e is extended to the stroke end. Through the series of operations described above, the zero point positions of both the cutter jack 5A and the stroke jack 7A can be adjusted. After completing the adjustment, open the manual stop valves v1 and v2 and close the manual stop valves v3 and v4 to return to the normal operating state. The above has described the operation of the overcutter I as the overcutter 3A moves forward and backward, but the operation of the overcutter 3B is also exactly the same as that of the overcutter 3A.

FIG. 7 shows the configuration of the second invention (=j
This is an example of the extended/contracted start position detector. Reference numeral 40 denotes an encoder plate which is fixed to the tip of a shaft 43 supported by the bearing 4 and 42, and the shaft 43 is connected via a camp ring 44 and a shaft 45 as shown in FIG. 1(a').
Specifically, the shaft 45 passes through the center of the inner cylinder 8B of the swivel point 8 shown in FIG. 4 and is fixed so as to rotate together with the cutter disk 4. Reference numeral 46 denotes a photo ink converter having a U-shaped cross section with a light receiving diode 46A and a light emitting diode 46B mounted on both inner surfaces thereof, and an encoder plate 40 rotating through the gap between the two inner surfaces. The photo ink club 46 is attached to a metal fitting 49 which is rotatably supported on the casing 48 of the telescopic start position detector 47 with a screw 50, and with the mutual arrangement maintained, the attachment position can be adjusted as shown in FIG. An adjustment knob 51 is provided to enable rotational displacement around the axis of the excavator main body 16 shown in a). The photo ink lamp 46 is connected to the light emitting/receiving device 52, and when the position mark 40A shown in FIGS. 8(a) and 8(b) provided on the encoder plate 4o passes, the light receiving diode 46.DELTA. It emits a detection signal via the code 46B. The encoder plate 40 is made of, for example, a transparent synthetic resin, and is coated with an opaque paint on the surface 40B excluding the position mark 40Δ to form the position mark 40A.
do.

Also, the position mark? It is also possible to exclude the application of paint in the vicinity of the same radius of the IOA and to form the final position mark 408 (on-site). As shown in FIG. 8(a), the photo ink converter 46 is connected to semicircles R1 and R on different diameter circles of the encoder plate 40.
2 are provided at two predetermined angles .alpha. in correspondence with each one of the position marks 40A.

If the embodiment of the above configuration is combined with the above-described invention, it is possible to control the forward and backward movement of the i<force/vines 3A and 3B as follows.

As shown in FIGS. 8(a) and 8(b), the four tabs 46 sandwiching the encoder plate 40 form an angle α at the respective positions A, +3, C, and D, and their mutual arrangement is constant. Attached to the arrow 53 of the force and Tsukudisk.
With rotation in the direction or direction of arrow 54, encoder plate 40 rotates in either direction via shafts 45 and 43. When the encoder plate 40 rotates in the direction of the arrow 53 and an overcut between 8 and B is required, as shown in FIG.
) When the photo ink club 46 shown in FIG. 8(a) is electrically connected to operate by the operation in the control box 55 shown in FIG. electrically connected to operate.

For example, when the encoder plate 40 is in the state shown in FIG. 9(a), the overcaps 3A and 3B are both retracted. As the cock disk 4 rotates in the direction of arrow 53, the encoder plate 40 also rotates in the same direction, and as shown in FIG. 46 light receiving diodes 46A and light emitting diodes 46B. At that moment, a detection signal is transmitted to the light emitting/receiving device 52, and a current flows due to the detection signal.
Since the solenoid 21a of the electromagnetic switching valve 21A shown in FIG. 3A is shown in Figure 9 (b
) begins to expand in the direction of the arrow. Then, the overcutter 3B is advanced by a preset amount of advancement δ as shown in FIG. 9(C) to strike the ground, and at this time, the overcutter 3B is maintained in the retracted state. As shown in FIG. 9(d), the encoder plate 40 rotates to mark a position mark 40A on a radius of 1 to 2.
When coincident with the f:tl-interrupter 46 at position B, an exciting current is caused to flow through the solenoid 21b of the electromagnetic switching valve 21A by the same detection signal as described above.

However, when it came to 3A, it moved in the direction of the arrow. In the state shown in FIG. 9<e), both the overcutter 3A and 3B remain in the retracted state, and as shown in FIG. When the solenoid 21a of the electromagnetic switching valve 21-3 shown in FIG. 3 is energized in the same way as in the case of FIG.
begins to expand in the direction of the arrow in FIG. 9(f). At this time,
The retraction of overcutter 3A is maintained, and the overcutter 3B
is a preset advance amount δ. LJ advances as shown in FIG. 9 (g>) to overcut the ground.

As shown in FIG. 9(h), when the encoder plate 40 rotates and the position mark tOA on the radius R2 coincides with the photo ink club 46 at position I, the electromagnetic 'JJJU valve 21B
An excitation current is applied to the solenoid 21b, and the overcutter 3B moves back and forth in the direction of the arrow. By repeating the above-mentioned overcut a necessary number of times, the excavator main body 16 shown in FIG. 10(a) is obtained.
A lateral space 178 is excavated. Note that if the adjustment knob 51 is rotated by 90 degrees while maintaining the mutual arrangement of the photo ink bumpers 46 shown in FIG. 7, the 10th [IJJ
Space 17C at a position displaced by 90 degrees as shown in (L+)
can be drilled. Similarly, by turning and displacing it by 45 degrees, it is also possible to overcut diagonally as shown in FIG. 10(C). Furthermore, when overcutting both sides of the excavator main body 16 as shown in FIG. 10(a), the control box 5
If a command to that effect is given by operating a switching switch or the like in step 5, the electromagnetic switching valves 21A and 21B are controlled to open and close differently from the above. In addition, when excavating a wide space 17D as shown in FIG. 10(C), the amount of overcut of the ground may be adjusted by eight rounds using a spacer as described in the first invention.

(f) Effect of the invention As described in detail above, the first invention has the following effects:
When the shield tunneling machine makes a sharp turn or a slow curve, the depth of the space on the side of the main body of the tunneling machine necessary for the curve can be appropriately selected using a spacer fitted to the first cork jack. Therefore, the shield tunneling machine can make a desired curve.

In addition to the effects of the above-mentioned invention, the second invention enables the operator to electrically secure a positive 1i1c space area suitable for the direction of the turn by operating a control box in the operator's cab. Compared to the case of overcutting, unnecessary overcutting is eliminated, and it is possible to avoid depression of the excavator body.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional view of a shield excavator of a conventional example and embodiments of the first and second inventions, and FIG. 2(b) is a cross-sectional view of the same figure (a).
Fig. 2 is a hydraulic circuit diagram of a conventional cutter jack, Fig. 3 is a hydraulic circuit diagram of a cutter jack according to an embodiment of the first invention, and Fig. 4 is a sectional view of a swivel joint. , Fig. 5(a) to (e) and Fig. 6 are explanatory diagrams for mounting the spacer, Fig. 7 is a cross-sectional view of the cutter jack extension/contraction start position detector of the second invention, and Fig. 8(a) is an explanatory diagram of the installation of the spacer. Fig. 8(b) is a sectional view taken along the line 11 [-■ in Fig. 9(a), Fig. 9(a) to (h) is an explanatory diagram of the operation of the en:2-da plate, Figures 10 (a) to (C) are a set of copies, Oha caso 1.
It is a formation diagram of space by ~. 1-Shield excavator, 2-Ohakasota device, 3A, 3
B--Overcut, 5A, 513- Cutter jack, 7A, 7B- Stroke jack, 7e, 7f- Piston rond, 16- Excavation 1 body, 18- Hydraulic circuit, 2
1A, 21B-Solenoid switching valve, 29A-29C-Spacer, 40-Encoder handling, 40A-One position mark, 4G-
Claw 1 - Inflator, 47 - Cutter jack extension/contraction start position detector Patent applicant Kawasaki Heavy Industries Co., Ltd. Agent Patent attorney Yoshimura 11 Ito Toshi (and one other person) Figure 1 (
a) Figure 1 (b) B Figure 5 (d) Figure 5 (9) Figure 8 (a) ■ Figure 8 <b> Figure 9 (a) Figure 9 (b) Figure 9 ( C) Figure 9 ((1) Figure 0 (a) Figure 10 (b) Figure 10 (C)

Claims (5)

[Claims] (1) An overcutter device in which the cutter jack, which expands and contracts in response to the expansion and contraction of the stroke jack, is interposed in a hydraulic circuit that expands and contracts the cutter jack with hydraulic oil supplied through an electromagnetic switching valve. A shield excavator characterized in that a removable spacer is fitted to the piston rod of the stroke jack, and by changing the length of the fitted spacer, the amount of extension of the cutter jack can be changed. overcutter device. (2) The overcutter device for a shield tunneling machine according to claim 1, wherein the spacer is a cylindrical body split into two parts. (3) In an overcutter device in which the cutter jack that expands and contracts in accordance with the expansion and contraction operation of the stroke jack is interposed in a hydraulic circuit that expands and contracts the cutter jack using hydraulic oil supplied via an electromagnetic switching valve, the front He stroke jack a cutter jack expansion/contraction start position detector comprising a removable spacer fitted to the piston rod of the cutter jack and an encoder plate that rotates together with a photo ink club and a cutter disc facing the photo ink club; The extension tube of the cutter joint can be changed by opening and closing the electromagnetic switching valve according to the detection signal of the photo ink club along with the rotation of the cutter joint, and by changing the length of the spacer to be fitted. An overcutter device for a shield excavator, which is characterized by: (4) The shield according to claim 3, characterized in that the photo ink rubber is rotatably displaceable around the axis of the excavator main body while the mutual arrangement is maintained. Overcutter device for excavator. (5) The photo ink clubters are characterized in that two of them are installed at a predetermined angle apart, corresponding to each position mark provided on circles with different diameters of the encoder plate. An overcutter device for a shield excavator according to claim 3.