JP2005226771A - Fluid pipe device and shield machine using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid pipe device enabling the separation of a fluid pipe in mid course, sending/receiving a fluid even if relatively twisted, easily connected, and reduced in size. <P>SOLUTION: This fluid pipe deice comprises a first member having a plurality of fluid passages and a second member having a plurality of fluid passages corresponding to the fluid passages of the first member. Also, each of the first member and the second member comprises connection parts forming, by connecting to each other, a plurality of flow passages corresponding to the fluid passages. The flow passages at the connection parts are partitioned by a plurality of seals disposed at the connection parts coaxially with each other. The first member may be formed in a fluid cylinder structure extended and retracted by the supply and discharge of the fluid. This fluid pipe device is suitably used as a fluid pipe device between the cutter heads of master and slave shield machines. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a separable fluid piping device and a shield excavator using the fluid piping device.

  In a machine having a structure in which an actuator is moved using a working fluid such as pressure oil, there are many fluid pipes in the structure, but there may be a situation where these pipes should be separated on the way. Such a case will be described below based on the structure of a parent-child shield excavator used for tunnel excavation.

  The parent-child shield excavator is a structure that has a small-diameter child shield inside the parent shield, and after excavating the tunnel of a predetermined section with the parent and child together, the child shield is started from the inside of the parent shield to excavate the tunnel It is. That is, the parent-child shield excavator is a machine that can construct a small-diameter tunnel following a large-diameter tunnel by itself.

  8, 9, and 10 are diagrams showing an example of the structure of the parent-child shield excavator. 8 is a longitudinal sectional view when the parent shield is dug (when the parent and child are dug together), FIG. 9 is a longitudinal sectional view when the child shield is separated from the parent shield, and FIG. 10 is a front view when the parent shield is dug. is there. The parent-child shield excavator 100 has a structure in which a child shield body 103 is stored in a parent shield body 102. A child shield cutter head 105 is rotatably supported on the front side of the child shield body 103, and the child shield cutter head 105 is driven to rotate by an electric motor 108 provided in the child shield body 103. A parent shield cutter head 104 is provided on the outer periphery of the child shield cutter head 105, and the parent shield cutter head 104 is rotatably supported by the parent shield main body 102.

  A torque transmission rod 110 that extends in the radial direction and can be engaged with the parent shield cutter head 104 is provided on the outer periphery of the child shield cutter head 105. When the child shield cutter head 105 and the parent shield cutter head 104 are engaged by the torque transmission rod 110, the parent shield cutter head 104 is moved by the electric motor 108 provided in the child shield main body 103. And can rotate together.

  In the figure, reference numeral 120 denotes a copy cutter device, which is a device for projecting outward in the radial direction of the cutter head to increase the excavation diameter. In the example shown in FIGS. 8 to 10, the same copy cutter device 120 is used for the parent shield digging and the child shield digging, and the entire copy cutter device 120 is the child shield cutter head. A long stroke jack 120 </ b> J provided in 105 is advanced and retracted. That is, when the parent shield is dug, the jack 120J is extended to move the entire copy cutter device 120 into the parent shield cutter head 104, and when the child shield is dug, the jack 120J is shrunk and the whole copy cutter device 120 is moved to the child shield cutter. It is designed to be stored in the head 105. In the example of the parent-child shield described above, there is no hydraulic actuator in the parent shield cutter head 104, and no fluid piping is present in the parent shield cutter head 104.

  By the way, unlike the above-mentioned example, there is a case where fluid piping must be provided in the parent shield cutter head. The parent shield cutter head has a donut shape with a diameter of 5 meters or more, and rotates relative to the parent shield body. Therefore, the parent shield cutter head is located between the parent shield cutter head and the parent shield body. It is difficult to perform hydraulic piping directly. Therefore, it is desirable to connect the pipe from the child shield body side to the parent shield cutter head once via the child shield cutter head. Further, the piping needs to be structured to be separable between the parent shield cutter head and the child shield cutter head when the child shield starts from the parent shield.

  Patent Document 1 discloses a separable piping device provided between a parent shield cutter head and a child shield cutter head. FIG. 11 is a diagram showing a structure of a fluid piping device disclosed in Patent Document 1 as a known technique. In Patent Document 1, an outer peripheral manifold 122 for hydraulic equipment inside the outer cutter is provided on the outer cutter (corresponding to the parent shield cutter head), and the inner cutter (corresponding to the child shield cutter head) is provided inside. A configuration in which the peripheral manifold 121 is provided so as to freely advance and retract is shown. Convex portions T are provided at the end of the inner peripheral manifold 121 by the number of oil intake / exhaust passages, and corresponding concave portions O are provided at the end portions of the outer peripheral manifold. The inner peripheral manifold 121 is configured to be advanced and retracted by the separation jack 150 so that the engagement and disengagement are possible. The outer peripheral manifold 122 and the hydraulic equipment inside the outer cutter are connected by a rubber hose G, and the hydraulic hose H connected to the inner peripheral manifold 121 is drawn to the child shield body side through the rotating shaft of the cutter.

According to this configuration of Patent Document 1, when the large-diameter shield (corresponding to the parent shield) and the small-diameter shield (corresponding to the child shield) are integrated, the pressure oil between the inner cutter and the outer cutter. In addition, when starting the small-diameter shield from the large-diameter shield, the pipes can be separated by separating both manifolds.
Japanese Patent No. 3314586

However, the technique disclosed in Patent Document 1 has several problems to be improved. This is listed below.
1) It is a structure in which a plurality of flow paths are simply arranged in parallel, and a connecting part consisting of a concave part and a convex part is required as many as the number of flow paths. It will be big.
2) If the inner peripheral manifold and the outer peripheral manifold are twisted relatively slightly, the manifolds cannot be connected to each other. For this reason, high accuracy is required for mounting the manifold to the cutter head.
3) The longitudinal dimension of the entire device is large.
4) When the inner peripheral manifold is moved by the separation jack, the hydraulic hose connected to the inner peripheral manifold is also moved. Therefore, it is necessary to provide a sufficient length for the hydraulic hose. However, the fact that there is a margin in the length of the hydraulic hose means that sagging occurs in the hydraulic hose. The slack of the high-pressure hydraulic hose disposed in the cutter head, which is a rotating object, is not preferable because it causes damage to the hose due to rubbing or the like.

  The present invention has been made paying attention to the above-described problem, and an object thereof is to provide a hydraulic piping device that can solve at least one of the above-mentioned problems and a shield excavator that effectively uses the hydraulic piping device. And

  In order to achieve the above object, a fluid piping device according to a first invention of the present application corresponds to (a) a first member having a plurality of fluid passages and the fluid passages of the first member, respectively. And (b) the first member and the second member are respectively connected to each other to correspond to the passages of the plurality of systems. (C) each of the flow paths in the connection section is partitioned by a plurality of seals arranged coaxially with the connection section. And

  A fluid piping device according to a second invention of the present application is the fluid piping device according to the first invention, wherein at least one of a plurality of flow paths formed in the connection portion is formed by a set of seals having the same seal diameter. It is divided and formed.

  The fluid piping device according to a third aspect of the present invention is the fluid piping device according to the first aspect or the second aspect, wherein at least one of the first member and the second member is orthogonal to a connecting direction of both members. It is characterized by being elastically supported so as to allow displacement in the direction.

  A fluid piping device according to a fourth invention of the present application is the fluid piping device according to any one of the first to third inventions, wherein (d) the first member is a cylinder body and the cylinder body. A fluid cylinder structure configured by a slidable rod body, wherein the rod body expands and contracts with respect to the cylinder body by supplying and discharging a fluid; and (e) a fluid pipe for expanding and contracting the rod body on the cylinder body And a second pipe connection portion for connecting a plurality of lines of fluid pipes exchanged between the first member and the second member. It is characterized by being able to.

  A fluid piping device according to a fifth invention of the present application is the fluid piping device according to the fourth invention, wherein (f) the first member in the first member is exchanged between the first member and the second member. At least one of a plurality of fluid passages is provided in the cylinder body and opens to a sliding surface with the rod body, and a sliding surface provided with the rod body and the cylinder body (G) the circumference of the opening to the sliding surface of the cylinder side passage in the cylinder body, or the circumference of the opening to the sliding surface of the rod side passage in the rod body (G) a passage on the side where the annular groove is not formed is formed on the second member by extending the rod body with respect to the cylinder body. When connected Wherein the serial towards the groove of the annular those formed to open.

  The sixth invention relates to a shield excavator, and in the parent-child shield excavator in which the child shield can be separated from the parent shield, the fluid piping in the child shield cutter head and the fluid piping in the parent shield cutter head are the above. It is connected using the fluid piping apparatus according to any one of the first to fifth inventions.

  The seventh invention also relates to a shield excavator. In the parent-child shield excavator according to the sixth invention, the fluid piping device transmits torque between the parent shield cutter head and the child shield cutter head. It also serves as a device for this purpose.

  According to the first invention, the apparatus can be downsized as compared with the structure disclosed in Patent Document 1. In particular, this effect becomes more prominent as the number of pipes to be connected increases. Moreover, even if the 1st member and the 2nd member are twisted, both can be connected.

  According to the second aspect of the present invention, the flow path defined by the pair of seals having the same seal diameter at the connection portion between the first member and the second member depends on the pressure of the fluid flowing through the flow path. The first member and the second member are not separated by force. Therefore, even when a high-pressure fluid flows through this flow path, it is not necessary to keep the first member and the second member from separating.

  According to the third invention, even if the first member and the second member are attached with a slight inclination, the two members can be connected.

  According to the fourth invention, even if the first member and the second member are connected or separated, the hydraulic hose connected to the pipe connecting portion does not move, so the hydraulic hose does not sag. . In addition, as disclosed in Patent Document 1, the longitudinal dimension can be made much smaller as compared with a configuration in which a separate jack is provided separately.

  According to the fifth invention, if the rod member is shrunk to separate the first member and the second member, the rod side passage and the cylinder side passage are partitioned, so that the fluid passage is formed on the first member side. It will be blocked. For this reason, a valve for blocking the passage is not required on the first member side. Moreover, if the 1st member and the 2nd member are the connected state, even if the rod body of the 1st member rotates with respect to the 2nd member, the 1st member and the 2nd member The communication state of the fluid passage between the two is maintained.

  The fluid piping devices according to the first to fifth inventions are suitable for use in fluid piping between the parent shield cutter head and the child shield cutter head due to the effects of the above-described inventions. According to the sixth aspect, in addition to the effects of the first to fifth aspects, it is possible to effectively utilize the narrow cutter head.

  Furthermore, the fluid piping device according to the first to fifth inventions is required for a torque transmission device between two parent and child cutter heads in a parent-child shield excavator in terms of structure and function. It is easy to manufacture to meet the specifications. Therefore, according to the seventh aspect of the present invention, in the parent-child shield excavator, the fluid piping device also serves as the torque transmission device, so that the device configuration inside the cutter head can be greatly simplified.

  Hereinafter, embodiments of a fluid piping device according to the present invention and a shield excavator using the fluid piping device will be described with reference to the drawings.

  FIG. 1 is a longitudinal cross-sectional view of a parent-child shield excavator equipped with a fluid piping device according to an embodiment of the present invention, and FIG. 2 is a front view thereof. FIG. 3 is a longitudinal sectional view of the parent-child shield excavator equipped with the fluid piping device according to the embodiment of the present invention during the child shield excavation, and FIG. 4 is a front view thereof.

  The parent-child shield excavator 1 according to the present embodiment has a structure as shown in FIGS. 1 and 2 when the parent shield is dug (when the parent-child is dug together). The parent shield main body 2 is composed of a parent shield front body portion 2i and a parent shield rear body portion 2ii, and the parent shield front body portion 2i and the parent shield rear body portion 2ii are connected to each other by a bent jack 16 so as to be bent. Yes.

  The parent shield front body portion 2i has a cylindrical space inside, and the child shield first front body portion 3i which is a part of the child shield body 3 is stored in the cylindrical space and is held by the stopper 9. It is fixed. A child shield cutter head 5 is rotatably supported via a center shaft 7 at the front portion of the child shield first front body portion 3i. Further, the parent shield cutter head 4 is rotatably supported on the front portion of the parent shield front body 2 i via the support member 6 so as to surround the outer peripheral side of the child shield cutter head 5.

  Two parent shield copy cutter devices 11, which are hydraulic actuators, are provided inside the parent shield cutter head 4. Further, as shown in FIG. 4, two child shield copy cutter devices 12 that are hydraulic actuators are also provided inside the child shield cutter head 4 as used only when the child shield is dug. Yes. Each of the parent shield cutter head 4 and the child shield cutter head 5 is provided with a plurality of additive material discharge ports 13 which are liquid discharge ports for assisting excavation. Further, a fluid piping device 20 is provided inside the child shield cutter head 5 for transferring fluid (pressure oil or additive) between the child shield cutter head 5 and the parent shield cutter head 4. Has been. Details of the structure of the fluid piping device 20 which is a characteristic part of the present invention will be described later.

  A plurality of cutter rotating hydraulic motors 8 (only one is shown) for driving the parent shield cutter head 4 are provided in the parent shield front body 2i. In addition, a screw conveyor 10 for discharging excavated earth and sand is installed in the lower part of the front body portion 2i of the parent shield. In the main shield rear trunk 2ii, an erector 14 for assembling a segment to be a lining member of the excavated tunnel, and a shield jack 15 for advancing the shield excavator by taking a reaction force on the assembled segment. Is provided. A hydraulic unit (not shown) is installed behind the shield excavator and is used as a hydraulic actuator such as a cutter rotating hydraulic motor 8, a parent shield copy cutter device 11, an elector 14, a shield jack 15, and a folding jack 16. Supplying pressurized oil.

  Pipes of fluid in the parent shield cutter head 4, that is, hydraulic pipes connected to the parent shield copy cutter device 11 and additive pipes connected to the additive discharge port 13 of the parent shield cutter head 4 are: It is connected to piping in the child shield cutter head 5 via the fluid piping device 20. Furthermore, they are led into the child shield main body 3 through a center shaft 7 and a swivel joint (not shown), and are connected to a hydraulic unit and an additive pump (not shown) behind the shield excavator.

  The fluid piping device 20 also serves as a device (corresponding to the torque transmission rod 110 in FIGS. 8 to 10) that transmits the rotational torque of the child shield cutter head 5 to the parent shield cutter head 4. By connecting the piping device 20, the child shield cutter head 5 and the parent shield cutter head 4 are mechanically connected to transmit torque. Details of the fluid piping device 20 will be described later.

  With the above-described structure, the parent-child shield excavator 1 according to the present embodiment integrates the parent shield cutter head 4 and the child shield cutter head 5 together by the cutter rotating hydraulic motor 8 during the parent shield excavation. The tunnel can be excavated by rotating. Further, during excavation, the parent shield copy cutter device 11 can be operated, and the additive material is discharged from the additive material discharge ports 13 of both the child shield cutter head 5 and the parent shield cutter head 4 toward the ground. Can be discharged.

  When the child shield excavator is separated from the parent shield excavator and excavates alone, the child shield excavator is in a state as shown in FIGS. A plurality of cutter rotating hydraulic motors 8 (only one is shown) are installed in the child shield first front body 3i. The cutter rotating hydraulic motor 8 is relocated from the parent shield excavator side after the completion of the parent shield excavation. A child shield second front trunk 3ii is attached to the rear part of the child shield first front trunk 3i, and the child shield rear trunk is interposed behind the child shield second front trunk 3ii via a middle jack 17. The portion 3iii is attached to bendable. The child shield second front body portion 3ii, the child shield rear body portion 3iii, and the like are assembled in the parent shield main body 2 after completion of the parent shield excavation, and the child shield main body 3 includes the child shield first front body portion. 3i, a child shield second front body portion 3ii, and a child shield rear body portion 3iii.

  In the child shield main body 3, instead of the screw conveyor 10 at the time of the parent shield excavation, a feeding / discharging mud pipe 18 for discharging excavated earth and sand is installed. A shield jack 58 and an erector 19 are also installed in the child shield body 3 in the same manner as the parent shield excavator. These devices are also installed in the main shield body 2 after completion of the main shield excavation.

  The fluid piping connecting the inside of the child shield body 3 and the inside of the child shield cutter head 5 is the same as when the parent shield is dug. However, the fluid pipe device 20 only separates the pipe connected to the parent shield cutter head 4. As the fluid piping device 20 is separated, the child shield cutter head 5 and the parent shield cutter head 4 are also mechanically separated.

  With the structure as described above, the parent-child shield excavator 1 according to the present embodiment can excavate the tunnel by rotating the child shield cutter head 5 by the cutter rotating hydraulic motor 8 during the child shield excavation. . Further, the child shield copy cutter device 12 can be operated, and the additive material can be discharged from the additive material discharge port 13 of the child shield cutter head 5 toward the ground.

  Next, the structure of the fluid piping device 20 and the mode of attachment thereof will be described. 5 and 6 show a cross section of the fluid piping device 20 in a state where the fluid piping device 20 is attached to the parent-child shield excavator, and FIG. 5 is a diagram illustrating a state in which piping is connected by the fluid piping device 20. These are figures which show the state from which piping was isolate | separated by the fluid piping apparatus. FIG. 5 is a view taken along the line AA in FIG. 1 and is rotated by 90 ° for easy viewing. FIG. 6 also corresponds to the AA view of FIG. 1 and is shown rotated by 90 ° for easy viewing.

  As shown in FIG. 5 and FIG. 6, the fluid piping device 20 includes a first member 21 attached to the child shield cutter head 5 side and a second member 22 attached to the parent shield cutter head 4 side. Has been. Each of the first member 21 and the second member 22 has three fluid passages that are exchanged between the parent shield cutter head 4 and the child shield cutter head 5, that is, the parent shield copy cutter device 11. Pressure oil passages (23IRa, 23ISa, 23IIa) for extending, pressure oil passages (23IRb, 23ISb, 23IIb) for shrinking the parent shield copy cutter device 11, and passages (24I) for supplying additive materials 24II).

  The first member 21 includes a substantially cylindrical cylinder body 25 and a substantially cylindrical rod body 26 slidably fitted in the cylinder body, and the rod body 26 can be expanded and contracted by supplying and discharging pressure oil. It has a simple hydraulic cylinder structure. The cylinder body 25 is fixed to a mounting seat 60 provided on the child shield cutter head 5 by a bolt (not shown) so as not to protrude from the outer peripheral surface of the child shield cutter head 5. The length of the rod body 26 is set such that the tip end portion hardly protrudes from the end surface of the cylinder body 25 in a state where the rod body 26 is completely contracted into the cylinder body 25 (see FIG. 6).

  The rod body 26 has substantially the same diameter over the entire length (hereinafter, this diameter is referred to as “diameter D1”). )) And a seal 27 is provided on the large diameter portion.

  The cylinder body 25 is integrally constituted by a first cylinder body 25i, a second cylinder body 25ii, a cylinder sleeve 25iii, and a bottom member 25iv. The cylinder sleeve 25iii is inserted into the inner surface of the tip end of the first cylinder body 25i, and is liquid-tightly fixed to the first cylinder body 25i by a bolt (not shown). The inner diameter of the cylinder sleeve 25iii is D1, and the seal 28 and the dust wiper 46 are mounted on the inner periphery. A second cylinder body 25ii is liquid-tightly attached by a bolt (not shown) to the side of the first cylinder body 25i opposite to the cylinder sleeve 25iii mounting side. The inner diameter of the second cylinder body 25ii has a diameter D1 over almost the entire area, and a seal 61 is provided on the inner peripheral surface of the second cylinder body 25ii. The inner peripheral surface of the second cylinder body 25ii forms a sliding surface of the rod body 26 together with the inner peripheral surface of the cylinder sleeve 25iii. A bottom member 25iv is liquid-tightly attached to the end surface of the second cylinder body 25ii with a bolt (not shown). The inner diameter of the first cylinder body 25i is a dimension of a diameter D2 over a predetermined length, and the large diameter portion 59 of the rod body 26 is slidably fitted into this position. With the above configuration, oil chambers 29a and 29b are formed on the left and right sides of the large diameter portion 59 of the rod body 26, respectively.

  Here, the surface of the diameter D1 on which the rod body 26 can slide with respect to the cylinder body 25 is not only a sliding surface but also a guide surface that defines the movement direction of the rod body 26, and the rod body. It is also a support surface for supporting the force acting in the radial direction of 26 by the cylinder body 25. Hereinafter, this surface is referred to as a “supporting sliding surface” in the present specification.

  The cylinder body 25 is provided with oil passages 30a and 30b. The oil passage 30a opens to an oil chamber 29a formed on the side of the large diameter portion 59 of the rod body 26, and opens to a pipe connecting portion 44a that is a connecting portion of a hydraulic hose on the rod extension side. The oil passage 30b opens to the other oil chamber 29b formed on the side of the large-diameter portion 59 of the rod body 26, and opens to a pipe connection portion 44b that is a connection portion of the hydraulic hose on the rod contraction side. . As is clear from the above description, the first member 21 extends the rod body 26 by supplying pressure oil to the oil chamber 29a through the oil passage 30a, and supplies pressure oil to the oil chamber 29b through the oil passage 30b. Thus, the rod body 26 is contracted to form a fluid cylinder structure.

  The cylinder body 25 is further provided with a passage 23ISa (first system), which is a pressure oil supply passage for extending the parent shield copy cutter device 11, and a parent shield copy cutter device 11. A passage 23ISb (second system) that is a pressure oil supply passage is formed, and these are connected to pipe connection portions 43Ia and 43Ib for connecting hydraulic hoses, respectively. Further, the passages 23ISa and 23ISb for the pressure oil for the copy cutter are opened in “support sliding surfaces” of the cylinder body 25 and the rod body 26, respectively. In the opening position of the cylinder body 25, annular grooves 47a and 47b are formed. Seals 32a1 and 32a2 are provided on the left and right sides of the groove 47a, and seals 32b1 and 32b2 are provided on the left and right sides of the groove 47b. With this configuration, an annular channel 57a is formed by the groove 47a and the seals 32a1 and 32a2, and an annular channel 57b is formed by the groove 47b and the seals 32b1 and 32b2.

  On the other hand, the rod body 26 also has a passage 23IRa (first system) that is a pressure oil supply passage for shrinking the parent shield copy cutter device 11, and pressure oil for shrinking the parent shield copy cutter device 11. A passage 23IRb (second system) which is a supply passage is formed. The passage 23IRa and the passage 23IRb are formed so as to open toward the annular flow paths 57a and 57b of the cylinder body 25 in a state where the rod body 26 is most extended with respect to the cylinder body 25 (FIG. 5).

  With the above configuration, when the rod body 26 is most extended with respect to the cylinder body 25, the passages 23ISa and 23ISb of the cylinder body 25 communicate with the passages 23IRa and 23IRb of the rod body 26, respectively. When contracted, these passages are blocked between the cylinder body 25 and the rod body 26 (see FIGS. 5 and 6). Further, if the rod body 26 is in the extended state, even if the rod body 26 rotates with respect to the cylinder body 25, the communication state between these passages between the cylinder body 25 and the rod body 26 is maintained.

  A through hole 48 is formed in the center of the bottom member 25iv in the cylinder body 25, and a pipe connection portion 31I is provided as a connection portion of the additive material hose. A cylindrical pipe 33 is attached to the position of the postponing through hole 48 toward the inside of the cylinder body 25. A through hole 49 is provided in the center of the rod body 26 along the longitudinal direction. The pipe 33 is slidably fitted into the through hole 49, and a seal 50 is provided on a sliding surface with the pipe 33. The length of the pipe 33 is a length that can ensure the fitting into the rod body 26 even when the rod body 26 is most extended. With the above structure, a passage for the additive material (third system) is ensured between the cylinder body 25 and the rod body 26 regardless of the stretched state of the rod body 26. This additive passage is indicated by reference numeral 24I in the figure. In addition, an air vent hole 51 is provided in the vicinity of the pipe connection portion 31I provided at the bottom of the cylinder body 25 so that the air is contained in the cylinder body 25 and does not hinder expansion and contraction of the rod body 26. Yes.

  Here, the structure of the distal end side of the rod body 26 will be described later, and the second member 22 will be described first. The second member 22 has a substantially cylindrical rod body receiving portion 34 having an inner diameter with which the rod body 26 of the first member 21 is slidable, and the rod body so as to fit into the inner peripheral surface of the rod body receiving portion 34. A manifold portion 35 fixed to the receiving portion 34 by bolts (not shown) is provided, and a seal 52 is disposed on a mating surface between the manifold portion 35 and the rod body receiving portion 34. A seal 53 and a dust wiper 54 are disposed on the sliding surface of the rod body receiving portion 34 with the rod body 26. A cylindrical rubber bush 36 is fixed around the rod body receiving portion 34. The second member 22 is fitted into a substantially cylindrical mounting portion 45 provided inside the parent shield cutter head 4, and is prevented from coming out of the mounting portion 45 by a pressing plate 37. The holding plate 37 is fixed to the mounting portion 45 by a bolt (not shown). In addition, although illustration is abbreviate | omitted, rotation prevention is given so that the 2nd member 22 may not rotate in the attachment part 45. FIG.

  In the manifold portion 35, corresponding to each fluid passage of the first member 21, a passage 23IIa (first system, copy cutter extending side), a passage 23IIb (second system, copy cutter contracting side), A passage 24II (third system, additive) is formed, and each of these fluid passages is connected to pipe connection portions 43IIa, 43IIb, and 31II for connecting hoses, respectively. The manifold portion 35 has a cylindrical projecting portion 38 processed into a tapered two-stage cylindrical shape inside the mating surface with the rod body receiving portion 34.

  Three seals 39i, 39ii, 39iii having the same diameter are attached to the cylindrical portion on the large diameter side of the cylindrical protrusion 38 with a predetermined distance therebetween, and an annular groove 41a is provided between the seal 39i and the seal 39ii. An annular groove 41b is formed between the seal 39ii and the seal 39iii. The fluid passage 23IIa opens in the groove 41a. The fluid passage 23IIb opens into the groove 41b.

  The additive material passage 24II in the manifold portion 35 opens toward the end surface of the small-diameter side cylinder of the cylindrical protrusion 38, and a seal 40 is provided on the small-diameter side of the cylindrical protrusion 38.

  Returning to the description of the first member 21. The rod body distal end side of the rod body 26 has a shape recessed in a two-stage cylindrical shape so as to be fitted into a cylindrical protrusion 38 formed on the manifold portion 35 of the second member 22. Further, the passage 23IRa as the first system in the rod body 26 and the passage 23IRb as the second system are respectively in the state in which the rod body 26 is fitted in the second member 22, and It is formed so as to open toward the groove 41a and the groove 41b. With the above configuration, in the state where the first member 21 and the second member 22 are connected, the annular channel 56a (first system) partitioned by the seals 39i and 39ii around the groove 41a. In addition, an annular channel 56b (second system) is formed around the groove 41b and partitioned by the seals 39ii and 39iii.

  The passage 24II (third system) for the additive in the rod body 26 is directed toward the end surface of the small-diameter side cylinder of the cylindrical protrusion 38 in a state where the rod body 26 is fitted in the second member 22. Open. That is, when the rod body 26 is fitted into the cylindrical protrusion 38, the flow path 55 (third system) defined by the seal 40 is formed. Note that the mounting dimensions of the first member 21 and the second member 22 are several between the tip of the rod body 26 and the end face of the manifold portion 35 when the rod body 26 is inserted into the second member 22. A gap of about mm is determined so as to prevent the rod body 26 and the manifold portion 35 from being damaged when the fluid piping device 20 is connected.

  From the above, if the first member 21 and the second member 22 are connected, even if the rod body 26 rotates with respect to the second member 22, the first member 21 and the second member The communication state between the passages of these three systems to and from 22 is maintained.

  By the way, when the first member 21 and the second member 22 are connected, high-pressure oil for operating the copy cutter is transferred from the passage 23IRa of the rod body 26 to the passage 23IIa of the manifold portion 35, or The passage 23IRb flows to the passage 23IIb of the manifold portion 35, and high pressure acts on the flow paths 56a and 56b. However, the flow path 56a is defined by the seals 39i and 39ii having the same diameter, and the flow path 56b is also defined by the seals 39ii and 39iii having the same diameter. No axial force is applied. That is, the rod body 26 does not come out of the second member 22 due to the pressure of the pressure oil for the copy cutter.

  On the other hand, on the additive material passage side, a force for pushing back the rod body 26 by the pressure of the fluid acts on the flow path 55 formed in the connection portion between the first member 21 and the second member 22. To do. However, since the pressure of the additive material is very small compared with the pressure of the pressure oil for the copy cutter, the pushing back force of the rod body 26 due to the additive material pressure is also small, which is not a problem. When the pushing back force becomes a problem, the flow path of the additive formed by the connection between the rod body 26 and the manifold portion 35 is similar to the flow path of the pressure oil for the copy cutter. It may be provided in between. In this case, the cylindrical projecting portion 38 in the present embodiment may be a single-stage cylindrical shape instead of a two-stage cylindrical shape, and four seals 39 having the same diameter may be provided instead of three. Alternatively, other measures as described later may be taken as means for preventing the rod body 26 from coming off.

  With the above structure, when the rod body 26 of the first member 21 is extended and connected to the second member 22, the first member 21 and the second member 22 are connected to the first member 21. Copy cutter expansion side pressure oil passage (23ISa, 23IRa, 23IIa) as system, copy cutter contraction side pressure oil path (23ISb, 23IRb, 23IIb) as system, and additive material path (third system) 24I, 24II) communicate with each other, and fluid can be exchanged between the child shield cutter head 5 and the parent shield cutter head 4. Further, even if the rod body 26 rotates, the communication of each fluid passage between the first member 21 and the second member 22 is maintained.

  By the way, as described above, the rod body 26 in the first member 21 has a structure in which the cylinder body 25 supports both sides in the longitudinal direction by the “supporting sliding surface”, and therefore, against the radial force. Extremely high rigidity. Further, since the rod body 26 itself has a structure in which a fluid passage is provided by drilling a solid cylindrical member, it is easy to ensure rigidity by appropriately designing the diameter. For this reason, in the present embodiment, the fluid piping device 20 is also used as a device for transmitting torque between the parent shield cutter head 4 and the child shield cutter head 5. The diameter of the rod body 26 and the length of the rod body receiving portion 34 are secured to a degree sufficient to transmit the rotational torque of the cutter head when the rod body 26 is inserted.

How to use the fluid piping device 20 in the first embodiment described above and the operation thereof are as follows.
(A) When the parent and child are excavated (see Fig. 1)
The fluid piping device 20 is in a connected state (see FIG. 5).
The rotational torque of the parent shield cutter head 4 is transmitted to the child shield cutter head 5 through the fluid piping device 20, and the parent shield cutter head 4 and the child shield cutter head rotate together.
Additives and pressure oil are supplied and discharged from the child shield cutter head 5 side to the parent shield cutter head 4 side via the fluid piping device 20.
(B) When the child shield is dug (see Fig. 2)
The fluid piping device 20 is fluidly separated (see FIG. 6).
As the fluid piping device 20 is separated, the parent shield cutter head 4 and the child shield cutter head 5 are completely separated mechanically.
In the process of separating the fluid piping device 20, the pressure oil supply / discharge flow path to the parent shield copy cutter device 11 is automatically shut off on the first member 21 side.

  FIG. 7 shows another embodiment of the fluid piping device according to the present invention. In the present embodiment, unlike the first embodiment, the respective flow paths (68a, 68b, 69) in the connecting portion of the first member 21 and the second member 22 are all sealed with different diameters 70, 71, 72. Since the other configuration and its operation are the same as those of the first embodiment, the same reference numerals are attached to the parts common to the first embodiment, and the detailed description thereof is omitted. To do.

  In the present embodiment, the flow paths 68a and 68b formed at the connection between the first member 21 and the second member 22 in accordance with the supply of pressure oil to the fluid passages 23IRa and 23IRb for the copy cutter. The force which pushes back the rod body 26 of the first member 21 acts on. Since the pressure oil for the copy cutter is high pressure, this force cannot be ignored, and therefore another means is required to prevent the first member and the second member from separating. For example, in order to prevent the rod body 26 from contracting, a check valve is provided in the pressure oil supply line on the side where the rod body 26 is extended, and the pressure oil is replenished every predetermined time in order to prevent contraction due to leakage of the pressure oil, It is conceivable to provide a mechanical locking means between the rod body 26 and the cylinder body 25 to prevent the rod body 26 from contracting.

It is a longitudinal cross-sectional view at the time of parent shield excavation of the parent-child shield excavator carrying the fluid piping apparatus which concerns on one Embodiment of this invention. It is a front view at the time of parent shield excavation of the parent-child shield excavator equipped with the fluid piping device according to one embodiment of the present invention. It is a longitudinal cross-sectional view at the time of the child shield excavation of the parent-child shield excavator carrying the fluid piping apparatus which concerns on one Embodiment of this invention. It is a front view at the time of child shield excavation of the parent-child shield excavator carrying the fluid piping apparatus which concerns on one Embodiment of this invention. It is a figure showing the state where piping was connected by the fluid piping apparatus. It is a figure which shows the state by which piping was isolate | separated with the fluid piping apparatus. It is a figure which shows other embodiment of the fluid piping apparatus which concerns on this invention. It is a figure which shows an example of the structure of a parent-child shield machine, and is a longitudinal cross-sectional view at the time of a parent shield machine. It is a figure which shows an example of the structure of a parent-child shield machine, and is a longitudinal cross-sectional view in the state which a child shield isolate | separates and starts from a parent shield. It is a figure which shows an example of the structure of a parent-child shield machine, and is a front view at the time of a parent shield machine. It is a figure which shows the structure of the fluid piping apparatus disclosed by patent document 1 as a well-known technique.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Parent-child shield excavator, 4 ... Cutter head for parent shields, 5 ... Cutter head for child shields, 20 ... Fluid piping apparatus, 21 ... 1st member, 22 ... 2nd member, 23 ... Pressure oil for copy cutters Passage, 23IRa, 23IRb, 23ISa, 23ISb, 24I ... passage, 23IIRa, 23IIR, 23IISa, 23IISb, 24II ... passage, 24 ... additive material passage, 25 ... cylinder body, 26 ... rod body, 39 ... 39i, 39ii, 39iii, 40, 70, 71, 72 ... seal, 41a ... flow path (connection part annular flow path), 44a, 44b ... first pipe connection part, 47a, 47b ... annular groove, 55, 56a, 56b, 68a , 68b, 69 ... flow path, 61 ... flow path, 31I, 43Ia, 43Ib ... second pipe connection part.

Claims (7)

A separable fluid piping device (20) comprising:
(A) A first member (21) having a plurality of fluid paths (23IRa, 23IRb, 23ISa, 23ISb, 24I) and a plurality of systems corresponding to the fluid passages of the first member (21), respectively. A second member (22) having a fluid passage (23IIRa, 23IIRb, 23IISa, 23IISb, 24II),
(B) The first member (21) and the second member (22) are connected to each other to thereby connect a plurality of flow paths (55, 56a, 56b) corresponding to the passages of the plurality of systems. 68a, 68b, 69),
(C) Each of the flow paths (55, 56a, 56b, 68a, 68b, 69) in the connection portion has a plurality of seals (39i, 39ii, 39iii, 40, 70, coaxially arranged in the connection portion). 71, 72), and a fluid piping device characterized by that. At least one of the plurality of flow paths (55, 56a, 56b, 68a, 68b, 69) formed in the connecting portion is partitioned by a pair of seals (39i, 39ii, 39iii) having the same seal diameter. The fluid piping device according to claim 1, wherein the fluid piping device is formed. At least one of the first member (21) and the second member (22) is elastically supported so as to allow displacement in a direction orthogonal to the connecting direction of both members. Item 1. A fluid piping device (20) according to item 1 or 2. (D) The first member (21) includes a cylinder body (25) and a rod body (26) slidable with respect to the cylinder body (25), and the rod body is supplied and discharged by fluid. (26) is a fluid cylinder structure that expands and contracts with respect to the cylinder body (25),
(E) a first pipe connection portion (44a, 44b) for connecting a fluid pipe for expansion and contraction of the rod body (26) to the cylinder body (25), and the first member (21). 2. A second pipe connection part (31 I, 43 Ia, 43 Ib) for connecting a plurality of lines of fluid pipes exchanged with the second member (22) is provided. To 3 fluid piping device. (F) In the first member (21), a plurality of fluid passages (23IRa, 23IRb, 23ISa, 23ISb) exchanged between the first member (21) and the second member (22). , 24I) are provided in the cylinder body (25) and provided in the cylinder body passage (23ISa, 23ISb) that opens to the sliding surface with the rod body (26), and the rod body (26). A rod-side passage (23IRa, 23IRb) provided on the sliding surface with the cylinder body (25).
(G) Around the opening to the sliding surface of the cylinder side passage (23ISa) in the cylinder body (25), or to the sliding surface of the rod side passage (23IRa, 23IRb) in the rod body (26). An annular groove (47a, 47b) is formed in at least one of the peripheries of the opening,
(G) In the passage (23IRa, 23IRb) on the side where the annular groove (47a, 47b) is not formed, the rod body (26) extends with respect to the cylinder body (25) and the second The fluid piping device according to claim 4, wherein the fluid piping device is formed to open toward the annular groove (47a, 47b) when connected to the member (22). In the parent-child shield excavator (1) in which the child shield can be separated from the parent shield, the fluid piping in the child shield cutter head (5) and the fluid piping in the parent shield cutter head (4) are as defined in claim 1. A parent-child shield excavator, which is connected using the fluid piping device (20) according to claim 5. The fluid piping device (20) also serves as a device for transmitting torque between a parent shield cutter head (4) and a child shield cutter head (5). 6 parent-child shield excavator.