JP2000274181A - Bypass device for vertical shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the construction of a vertical shaft bypass device and improve the efficiency of drive work. SOLUTION: A vertical shaft bypass device 1 has a slurry supply hole and a slurry discharge hole in axial direction in a slurry bypass block together with a chamber for communicating them, a valve body is made freely rotatable, the valve body supplies slurry supply water from a simplified slurry treatment apparatus 309 to the main body of a drive machine, slurry containing sediment excavated by the main body 4 of the drive machine is circulated to the simplified slurry treatment apparatus 309, or the slurry supply can be bypassed to the simplified slurry treatment apparatus 309 and further a hydraulic cylinder or the like capable of driving the valve body is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft bypass device which is applied to a muddy water propulsion device which presses underground a buried pipe such as an embi pipe or a fume pipe from a starting shaft to a reaching shaft while recirculating muddy water. It is about.

[0002]

2. Description of the Related Art Conventional muddy water pressurized small diameter pipe propulsion apparatus 70
129 is a bottom surface 70 of the starting shaft 704 as shown in FIG.
4a, a hydraulic base unit 706 fixed on the base 705, a hydraulic unit 708 (not shown) installed on the ground to drive the main unit 706, and a ground unit Then, a muddy water is adopted as a working fluid, the muddy water is pressurized, and a simple muddy water treatment device 709 for refluxing the muddy water, a shaft bypass device 713 for bypassing the muddy water, and a central shaft for controlling the muddy water pressurized state and the like are provided. It is composed of an operation panel 710 and the like. Simple muddy water treatment device 7
At the exit of 09, a mud pump 711 is installed.
From 12, muddy water can be supplied to the machine body 804 via the shaft bypass device 713. If the simple muddy water treatment device 709 is once stopped at the time of additional connection of a propulsion pipe (not shown), it takes time for the formed muddy water to settle and to stabilize the muddy water again. This is to always maintain the flow rate even when additional pipes are connected. On the other hand, the earth and sand excavated by the excavator main body 804 are connected to a connecting body (not shown), a drain pipe 715, a shaft bypass device 713,
A simple muddy water treatment device 70
9 to be recirculated. The shaft bypass device 713 is a device for changing the flow of the muddy water sent from the simple muddy water treatment device 709 on the ground, and includes mud feeds in pipes such as a mud feed pipe 712 and a mud drain pipe 715.
Reverse the flow of the sludge, or the excavator body 804
The muddy water can be immediately returned (returned) from the shaft bypass device 713 to the simple muddy water treatment device 709 without returning the muddy water.

[0003] The shaft bypass device 713 is composed of four manual valves 751, 752, 753 and 754, and is a ball valve provided with a valve in the lever direction.
1 is connected to the mud pipe 712 and the T pipe 772, the manual valve 752 is connected to the T pipe 772 and the T pipe 773, and the manual valve 753 is connected to the T pipe 772 and the mud pipe 732. The manual valve 754 is connected to the T-tube 773 and the drainage pipe 735. The mud pump 711 is connected to the simple muddy water treatment apparatus 709 and the mud pipe 712, and the mud pump 716 is connected to the mud pipe 715 and the T-tube 773. When returning muddy water to the excavator body 804, the manual valve 751 is opened, the manual valve 752 is closed, the manual valve 753 is opened, and the manual valve 754 is opened. On the other hand, when returning from the shaft bypass device 713 to the simple muddy water treatment device 709 immediately, the manual valve 751 is opened, the manual valve 752 is opened, the manual valve 753 is closed, and the manual valve 753 is closed.
54 is closed. Therefore, their mutual switching is 3
Six valves need to be opened and closed six times. In addition, valve operations are also required for initial installation and removal.

As described above, in the above-described conventional technique, the shaft bypass device 713 includes four manual valves 751 to 754 and the like, and the switching operation of the manual valves 751 to 754 must be performed six times for one propulsion. However, when connecting 50 propulsion pipes, the operation must be performed 300 times or more, the operation is complicated, there is a possibility that trouble due to an operation error may easily occur, and the efficiency of the propulsion work is improved. There was a point. Further, the structure of the shaft shaft bypass device 713 is complicated and takes up space in the starting shaft 704. In the case of construction with a small shaft, the shaft shaft bypass device 713 is used.
May take up space.

[0005]

SUMMARY OF THE INVENTION Therefore, the inventions according to claims 1 to 7 are intended to simplify the structure of a shaft bypass device,
An object of the present invention is to provide a shaft bypass device capable of improving the efficiency of propulsion work.

[0006]

SUMMARY OF THE INVENTION In view of the above problems, the invention according to claim 1 is provided with a mud feed passage and a mud discharge passage in an axial direction in a muddy water bypass block, And a bypass valve is rotatable in the chamber, and the bypass valve supplies the muddy water from the muddy water treatment device through the muddy passage to the excavator main body and excavates with the excavator main body. The shaft can be discharged to the muddy water treatment device by passing the muddy water containing the soil and sand that has been discharged, or the muddy water can be bypassed to the muddy water treatment device. Things. This simplifies the bypass structure,
Propulsion work efficiency is improved. Note that the present invention is applicable to any of a one-step muddy water pressure propulsion method and a two-step muddy water pressure propulsion method.

Further, the shaft bypass device of the present invention is preferably applied to the construction of relatively small-diameter buried pipes, such as gas pipes and underground electric wire pipes, in addition to sewers. It can be used for construction of underground pipes.

In view of the above problems, the invention according to claim 2 is
A muddy water bypass block, a chamber formed in a central portion inside the muddy water bypass block, and a muddy water bypass block that penetrates the muddy water bypass block in a front-rear direction so as to communicate with the chamber. A mud hole having a connection port to which a pipe is connected, and a mud drain pipe that penetrates the muddy water bypass block in the front-rear direction so as to communicate with the chamber and is arranged in parallel with the mud hole. A mud hole provided with a connection port to which mud water can pass, mud water can be passed at a parallel position parallel to the axial direction of the mud water bypass block, and mud water can be bypassed at an orthogonal position orthogonal to the axial direction. A valve body disposed in the chamber so as to be rotatable alternately at the orthogonal position or the parallel position, and a valve body which is turned to a central portion of the muddy water bypass block perpendicularly to the axial direction. A shaft shaft bypass device, comprising: a freely rotating shaft provided on the valve body; and a rotating portion capable of rotating the rotating shaft. . Thus, the same problem as the first aspect can be solved. Both manual and automatic are possible.

In a third aspect of the present invention, at the parallel position of the valve body, a first fitting surface capable of fitting with the valve body is provided at an end of the chamber in the parallel direction, The shaft shaft according to claim 1 or 2, wherein a second fitting surface capable of fitting with the valve body is provided at an orthogonal end of the chamber at the orthogonal position of the valve body. It is a device. This can solve the same problems as the first aspect of the present invention, and can prevent inconvenience caused by leakage of muddy water when the muddy water passes or bypasses.

Further, the invention according to claim 4 is characterized in that the rotating portion has a hydraulic cylinder disposed in the axial direction near the muddy water bypass block, a lever having one end fixed to the rotating shaft, A conversion mechanism that connects the other end of the lever to the piston rod of the hydraulic cylinder and converts the reciprocating motion of the piston rod of the hydraulic cylinder into a rotational motion of the valve body; and linearly holding the piston rod. 4. The vertical shaft bypass device according to claim 1, wherein the actuator is provided with a guide holding member that guides the shaft while guiding. Thus, the same problems as those of the first aspect can be solved, and stable and powerful driving of the valve element can be performed.

Although various structures can be adopted as the main body structure of the shaft bypass device, typically, the muddy water bypass block is formed by connecting the half bodies as described in the fifth aspect of the present invention. The shaft shaft bypass device according to any one of claims 1 to 4 can be provided.

Further, the invention according to claim 6 is the vertical shaft bypass device according to any one of claims 1 to 4, wherein the muddy water bypass block is of an integral type.

Further, the invention according to claim 7 is provided with a mud pump provided in a mud pipe on the outlet side of the muddy water bypass block and a mud pump provided on the outlet side of the muddy water bypass block. 7. The shaft shaft bypass device according to claim 1, wherein the shaft shaft is connected to a muddy water treatment device. This can solve the same problem as the first aspect of the present invention.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A shaft shaft bypass device 1 according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 4, the block-type shaft shaft bypass device 1 has a rectangular muddy water bypass block 3 provided with a chamber 2 (see FIG. 2) therein and is parallel to an axial direction (a feeding and discharging mud direction). The muddy water can be circulated by being in the parallel position (see FIGS. 4, 32 and 34 (a)), and can be bypassed by being in the orthogonal position orthogonal to the axial direction (see FIGS. 33 and 34). 34 (b), a plate-like valve element 5 (see FIG. 4) erected inside the chamber 2 so as to be rotatable alternately by 90 degrees at the orthogonal position or the parallel position, and a muddy water bypass block 3 A rotating shaft 6 fixed through the central portion of the valve body 5 in the axial direction and the vertical direction and rotatably provided in the muddy water bypass block 3; and a lever fixed to the rotating shaft 6. 7 and connected to this lever 7 to make it a 90 degree range Hydraulic cylinder is rotated 8
(See FIGS. 32 and 33) and stoppers 9a and 9b for restricting the rotation of the lever 7 and realizing the accurate rotation of the valve body 5.
It is composed of Since the muddy water can be bypassed by one valve element 5, the structure is simplified and the size is reduced. Further, in the use state, since it is a closed type, it can be protected from external pressure.

The muddy water bypass block 3 sends muddy water to the excavator main body 4 and discharges excavated muddy water and earth and sand (hereinafter referred to as a passing state), or blocks the passing state to provide a simple muddy water treatment apparatus. It has a function as a gate which can be alternatively switched to a gate 309 (hereinafter referred to as a bypass state). The above-mentioned passing state is necessary for supplying muddy water to the cutting edge surface along with the propulsion of the propulsion pipe 303 and discharging muddy water and earth and sand from the cutting edge surface. Necessary to enable connection work.

As shown in FIG. 4, the muddy water bypass block 3 is composed of a divided body (half body), an upper main body 30 and a lower main body 40, which are bolts 20a to 20h and positioning pins 21a,
21b (see FIG. 2). As shown in FIGS. 5 (a), 5 (b) and 7, the upper main body 30 is provided with a round shaft hole 31 in the upper center part, a semi-circular cross section mud hole 32 in the rear face part, and a semi-circular cross section drainage. A mud hole 33 is juxtaposed, and a mud hole 34 having a semicircular cross section and a mud hole 35 having a semicircular cross section are formed on the opposite front surface.
In addition, a circular chamber 2 as viewed from a plane, which is provided with a radius on the upper peripheral surface communicating with the mud hole 35, is formed to open downward. Thus, the mud holes 32 or the drain holes 35 can communicate with each other. Portions 32b to 35b (see FIG. 6) each having a semicircular cross section are formed in portions communicating with the outside of the mud holes 32 or the drain holes 35, and packing grooves 32a to 35a are respectively provided around the packing holes 22 to 25 (see FIG. 1 and FIG. 2), and a mud pipe 312,
The exhaust pipe 315 can be attached to the outlet side, and an exhaust pipe 332 and an exhaust pipe 335 (see FIGS. 25 and 26), which are elbow steel pipes, can be attached to the outlet side. These mounting ends can be suitably connected by welding to prevent water leakage. The ends of the sludge pipe 312 and the sludge pipe 315 are elbow steel pipes.

The above-mentioned mud feed pipes 332 and drain pipes 335 are provided with ball valves 352 and 353 at the ends opposite to the insertion ends, respectively, and are provided with electric joint collars 354 and 3.
55 are provided. The sludge pipe 332 and the sludge pipe 335 are respectively formed by the electric joint.
45 (see FIG. 27). These configurations have nothing to do during construction (during propulsion), but to prevent leakage of muddy water when the pipe is removed. Further, the exhaust pipe 335 includes a ball valve 358 above (downstream of) the ball valve 353. This is a ball valve 358
This is to open and remove the air before removing it.

As shown in FIG. 6, a mud hole 32 and a mud hole 33 are provided.
Are separated by a rear partition 36, and the mud holes 34 and the drain holes 35 are separated by a front partition 37. Rear bulkhead 36
Is provided with a fitting surface 36a facing the chamber 2 and capable of fitting with the valve element 5 (see the right curve surface 54 in FIG. 11).
The front partition wall 37 has a fitting surface 37a facing the chamber 2 and capable of fitting with the valve body 5 (see the left curved surface 53 in FIG. 11).
(See FIG. 4). The right side wall 26 and the left side wall 2 extend in a direction orthogonal to the fitting surfaces 36a and 37a.
7 are provided, and a fitting surface 26a,
27a. These fitting surfaces 26a and 27a are also adapted to be fitted to the valve body 5. This is to prevent muddy water from leaking in the passing state and the bypass state.

Further, as shown in FIG. 6, female screw holes 38a to 38c for mounting the bearing plate 10 (see FIG. 2) are provided on the upper surface of the upper main body 30. Bolts 20a to 20h for combining upper body 30 and lower body 40
And positioning pins 21a, 21b (see FIG. 2),
As shown in FIG. 6, female screw holes 39a to 39h and positioning holes 38i and 38j are provided.

As shown in FIGS. 8 (a), 8 (b) and 10, the lower main body 40 has a circular bearing hole 41 at the lower center, a mud hole 42 having a semicircular cross section at the rear surface, and a mud hole. 43, a mud hole 44 and a mud hole 45 having a semicircular cross section are formed in the front portion facing each other, and a mud hole 42,
The circular chamber 2 as viewed from above is provided with a rounded lower peripheral surface communicating with the mud holes 43, the mud holes 44, and the mud holes 45. Ports 42b to 45b (see FIG. 9) having a semicircular cross section are formed in portions communicating with the outside of the mud feeding holes 42 to the mud discharging holes 45, and packing grooves 42a to 45a are respectively provided around the packing holes 22 to 25 (see FIGS. 1 and 2) can be mounted.

As shown in FIG. 9, a mud hole 42 and a mud hole 43 are provided.
Are separated from each other by a partition wall 46.
5 is separated by a partition wall 47. The partition wall 46 has a fitting surface 46a facing the chamber 2 and capable of fitting with the valve element 5 (the right curved surface 54 in FIG. 11).
The valve body 5 (the left curved surface 5 in FIG. 11) facing the chamber 2
3) is provided with a fitting surface 47a capable of fitting with 3). Mating surface 4
6a, in the direction orthogonal to the mating surface 47a, the right side wall 28,
A left side wall 29 is provided, and has a fitting surface 28a, 29a at the center in the inside thereof. As described above, this is to prevent muddy water from leaking in the passing state and the bypass state. Further, as shown in FIG. 9, female screw holes 49a to 49h and positioning holes 49i, 49j for combining the upper body 30 and the lower body 40 on the upper surface of the lower body 40.
Is provided.

As shown in FIGS. 11 (a) to 11 (c), the valve body 5 is a plate-like body having an oval shape. A left curve surface 53 and a right curve surface 54 are provided, and an upper plane 55 and a lower plane 56 are provided above and below. Further, a square shaft hole 57 is formed in the center in the vertical direction. Left curve surface 53
When the muddy water passes through (when the valve element 5 is in the axial direction), the right curve surface 54 and the right curve surface 54 are respectively fitted with the fitting surfaces 37a and 47a.
On the other hand, in the muddy water bypass state (when the valve element 5 is in the direction orthogonal to the axial direction), the fitting surfaces 26a, 46a are fitted respectively.
27a and fitting surfaces 28a, 29a. That is, when viewed in a plan view along the axial direction, in the parallel position (passing state), the valve body 5
In the orthogonal position (bypass state), the valve element 5 can partition and separate the chamber 2 into two front and rear chambers.

The rotating shaft 6 has an upper shaft 60 and a lower shaft 61 connected by a spring pin 62 as shown in FIGS. The upper shaft 60 includes an upper portion 63 having a round cross section and a lower portion 64 having a round cross section cut at four locations. Upper 63
Can be fitted in the shaft hole 31 of the upper body 30 by mounting an oil seal 65 (see FIG. 1). Also,
The lower portion 64 is adapted to be fitted into the square shaft hole 57 of the valve body 5 (see FIG. 11B). Further, the lower shaft 6
1 is equipped with a submerged bearing 66 (see FIG. 1) and can be fitted into the bearing hole 41 of the lower main body 40 (see FIG. 8). Thus, the rotation shaft 6 is rotatable in the chamber 2 and the rotation of the valve body 5 is enabled.

As shown in FIGS. 13 (a) to 13 (d), the lever 7 has a lever body 70 which is a rectangular plate-like member, and a U-shaped ring which stands upright at the rear end of the lever body 70. Member 71
And a round shaft hole 72 formed at the front end of the lever body 70.
And a spring hole 7 formed in communication with the round shaft hole 72.
3

As shown in FIGS. 25 and 26, the hydraulic cylinder 8 has a piston rod 80, and connects a large-diameter extension rod 81 coaxially with the small-diameter piston rod 80. Is provided with a slide portion 82 on the front surface of the device. A guide member (not shown) for guiding the extension rod 81 to reciprocate in the axial direction is provided. The slide portion 82 includes a fixed plate 85 fixed to the extension rod 81 and a round bolt 87 fixed to a round hole (not shown) of the fixed plate 85.
Numeral 7 is engaged with the ring member 71 (see FIG. 13). The ring member 71 and the round bolt 87 correspond to the conversion mechanism described in the claims, and convert the reciprocating motion of the extension rod 81 into the turning motion of the lever 7.

The stopper 9 (9a, 9b) is shown in FIG.
As shown in (a) to (c), a bracket 92 having two round holes 90 and one female screw hole 91, a lever stopper 93 having a round head and capable of being screwed into the female screw hole 91, and this lever stopper 93 and a nut 94 that can be screwed together. When the stroke of the hydraulic cylinder 8 is not sufficient, the stopper 9 can forcibly adjust the rotation of the lever 7.

As shown in FIGS. 15A to 15C, the lever
7, a round plate 12 is formed below a rectangular flange 11, fixing holes 13a to 13c are perforated at three peripheral positions, and a shaft hole is formed at a central portion. 13d
Are perforated.

The operation of the shaft bypass apparatus 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 26, in the above-mentioned muddy water passing state, as shown in FIGS. The mud from 312 is supplied with mud holes 32, 42 (see FIG. 3) and chambers 2a, 2
b, Send to mud pipe 332 through mud holes 34,44. Further, the muddy water containing the earth and sand from the drainage pipe 335 is discharged to the drainage hole 3.
3, 43, the chambers 2a and 2b, and the wastewater are sent to the wastewater discharge pipe 315 via the wastewater holes 35 and 45.

On the other hand, in the bypass state, as shown in FIG. 25, the hydraulic cylinder 8 is driven, the piston rod 80 and the extension rod 81 are advanced, and the lever 7 is moved 90 degrees.
Rotate degrees. Then, the valve element 5 is at a position orthogonal to the axial direction, and muddy water from the mud pipe 312 is sent to the mud holes 32 and 42 and the chambers 2a and 2b as shown by the two-dot chain line arrow. Is changed by 180 degrees,
It is sent to the sludge pipe 315 via 3,43.

The muddy water passing state and the bypass state are alternately switched by the shaft bypass device 1 in order to connect the propulsion pipe 303 and the like.
That is, as shown in FIG. 26, the propulsion pipe 303 is propelled with muddy water passing through the valve body 5 at a position parallel to the axial direction, and after one propulsion, the valve body 5 is moved as shown in FIG. The muddy water is switched to the bypass state as a position perpendicular to the axial direction, and the muddy water is short-circuited (short-circuited). After that, the propulsion pipe 303 is disconnected and connected.

Next, the shaft bypass device 20 of the second embodiment
1 will be described with reference to FIGS. The shaft shaft bypass device 201 basically performs the same function as the shaft shaft bypass device 1, but has a slightly different internal structure. The components are simply illustrated with numbers in the 200s, and description thereof is omitted. As shown in FIGS. 20 to 22, the muddy water bypass block 203 is formed by integrating the lid 240 with the main body 230, and is not divided into an upper mold and a lower mold, and does not require positioning. As shown in FIGS. 23 and 24, the plastic valve 25
A metal valve 259 is fixed to a side surface of a 0 (for example, MC nylon). A plastic valve 250 is used for sealing, and a metal valve 259 is used for earth and sand. The plastic valve 250 has a front plane 251 with a recess 251a and a rear plane 25 with a recess 252a.
2, left curve surface 253, right curve surface 254, upper plane 25
5, a lower plane 256, and a square hole 257. The metal valve 259 has fixing holes 259a to 259d.

Next, the shaft bypass device 50 according to the third embodiment will be described.
1 will be described with reference to FIGS. The shaft bypass device 501 is provided with a manual lever 507 and is different from a device driven by hydraulic pressure. However, since the basic structure is the same as that of the above-described second embodiment, the corresponding components are 500s. With reference to the description, different configurations will be mainly described. The shaft bypass device 501 is characterized in that its movement is regulated by a stopper 509 so that the manual lever 507 can rotate 90 degrees. The manual lever 507 is configured to be easily operated by hand. An oil seal 565 is mounted in the lid 540, holds the rotating shaft 506, and seat ring 567, resin collar 5
The rotating nut 569 is fixed to the head of the rotating shaft 506 by a nut 569a with a 68 interposed therebetween. A manual lever 507 is fixed to the rotation nut 569. A notch is provided in the rotating nut 569 so that the stopper 509 can abut, and the movement of the manual lever 507 is set within a range of 90 degrees. In this embodiment, since there is no hydraulic cylinder, there is an advantage that the cost is reduced. However, manual operation is required and a little labor is required as compared with the above embodiment.

Next, the excavator body 4 will be described with reference to FIGS. 36 and 37. The excavator body 4 is provided with the cutter 1 in the front.
00 and a rear in-machine bypass section 101, and an excavator in-machine muddy water bypass device 1 ′ is disposed in the in-machine bypass section 101. The outer casing of the excavator body 4 includes an outer pipe 102, a first partition 103, an outer pipe 104, a second partition 105, a recess 106, a connecting pipe 107, an outer pipe 108, a connecting pipe 109, and a fixture 110 in that order from the front. , Recesses 111 are connected.

As shown in FIG. 37, the mud feed pipe 14, the mud feed pipe 1
6 are provided with pressure transmitters 18 and 19, respectively.
Lightweight electric wires 18a and 19a extending therefrom are transmitted through a through hole (not shown) to transmit a current indicating the pressure of muddy water to the outside. Based on detection signals from the pressure transmitters 18 and 19, the muddy water bypass device 1 'in the excavator
Is in the muddy water passage state, the propulsion speed of the excavator body 4 is controlled by controlling the driving force of the main pushing device 306, or the muddy water bypass device 1 ′ in the excavator is in the muddy water bypass state. At this time, when the inner pipe pressure on the back side and the front pressure (cutting blade pressure) of the muddy water bypass block 3 'are balanced, the muddy water bypass device 1' in the excavator is switched to the passing state, and the shock (shock) of the mud feed causes. This is to avoid the risk of land collapse and blockage in the pipe. That is, the detection values of the pressure transmitters 18 and 19 provide an indication for measuring the timing of switching the muddy water bypass block 3 '. The light-weight hydraulic hose 8a (see FIG. 35) and the light-weight electric wires 18a and 19a are not connected to each connecting member (connection unit) 180 described later, but are bundled to some extent and connected. The connection work is performed about once for ten connections of the body 180, thereby reducing the amount of work.

The muddy water bypass device 1 ′ in the excavator has the same structure as the vertical shaft bypass device 1, and is disposed at a position below the central axis of the excavator body 4. The description of the structure of the muddy water bypass device 1 ′ in the excavator uses the description of the shaft shaft bypass device 1, and the corresponding components are given dashes in the corresponding numbers. The muddy water bypass block 3 ′ sends muddy water and discharges muddy water and earth and sand (hereinafter referred to as “passing state”), or blocks the passing state and performs bypassing (hereinafter “bypass state”). It has a function as a gate that can be switched dynamically. The above-mentioned passing state is necessary for supplying muddy water to the cutting edge surface along with the propulsion of the propulsion pipe 303 and discharging muddy water and earth and sand from the cutting edge surface.
At the time of additional connection such as 03, it is necessary to prevent blockage of the pipeline, collapse of the ground, and the like.

At the center of the machine body 4, the center rotating shaft 112 is rotatably supported by the first partition 103 and the second partition 105. That is, the center rotation shaft 112
Between the first partition 103 and the oil chamber 113 and the oil chamber 114
Are provided around the oil supply passage 115 and the oil supply passage 116, respectively.
Are in communication. Fixed plate 117 in front of oil chamber 113
Are screw holes 11 on the front surface of the first partition 103 with bolts 118.
9 is fixed. Inside the oil chamber 113, a mechanical seal 120 is provided on the outer periphery of the center rotation shaft 112. A screw hole 12 is provided between the oil chamber 113 and the oil chamber 114.
1 is provided. Inside the oil chamber 114, a double-row tapered roller bearing 122 is provided on the outer periphery of the central rotation shaft 112. Behind the double row tapered roller bearing 122, the nut 1
23 and a washer 124 are provided. On the rear side, a female screw 125 and an oil seal 126 are provided.
At the rear of the first partition 103, a fixing plate 127 is provided with a bolt 128.
It is fixed at. Oil is supplied from the outer pipe 104 to the central chamber 1
29 so as not to leak.

A cutter 131 is fixed to the front chamber 130 at the front end of the center rotary shaft 112, and a pilot pipe fitting 132 is fixed to a central part in front of the cutter 131. The pilot tube fitting 132 can attach a pilot tube 302 and a read head 302a, which will be described later, and has a structure that prevents rotation of the central rotation shaft 112 from being transmitted to the pilot tube fitting 132. At the rear end of the center rotation shaft 112, a male spline 1
33, and the spline female part 1 of the center rotating shaft 134 is formed.
35 and a spline connection. Spline female part 1
Oiles metal 136 is provided on the outer peripheral portion of 35 and the inner peripheral portion of second partition 105 to function as a bearing. The rear end of oiles metal 136 is held down by flange 137,
The thrust of the central rotation shaft 134 is received. An O-ring 138 seals between the rear end outer peripheral portion of the first partition wall 103 and the front end inner peripheral portion of the outer tube 104. Also, the first partition 1
An O-ring 139 seals between the inner peripheral portion of the rear end of 03 and the inner peripheral portion of the fixed plate 127. Further, an O-ring 140 seals between a rear end outer peripheral portion of the second partition wall 105 and a front end inner peripheral portion of the connection pipe 107.

A spline female portion 141 is formed at the rear end of the center rotation shaft 134, and is spline-coupled to a male spline portion 189 formed at the front end of the center rotation shaft 188 (see FIG. 38). An oiles metal 144 is disposed on the outer peripheral portion of the central rotation shaft 134 and the inner peripheral portion of the fixture 110, and functions as a bearing. The front end of the oilless metal 144 is pressed by the flange 145 to receive the thrust of the fixing tool 110. Second partition 105 and fixture 11
Between zero, a rear chamber 149 is formed. In the rear chamber 149, the above-described muddy water bypass device 1 ′ in the excavator is provided below the central rotation shaft 134. An oil seal 143 is provided on the inner peripheral surface at the rear end of the fixture 110.
Is fitted.

A mud feed system 150 and a mud discharge system 170 (not shown) are formed below the center rotation shaft 112 and the center rotation shaft 134. Sludge system 150 and sludge system 17
Since the left and right pairs are provided in parallel with 0 and have the same structure, the mud feeding system 150 will be described, and the mud discharging system 17 will be described.
For 0, the description of the mud feeding system 150 is applied mutatis mutandis, and the description is omitted. This mud feeding system 150 is for sending muddy water from right to left in FIG. 36 to the front chamber 130. From the front, a mud sending through-hole 151 drilled below the inside of the first partition 103, A mud-feeding round hole 152 drilled below the inside of the second bulkhead 105, a connecting pipe 153 connecting the mud-feeding round hole 151 and the mud-feeding round hole 152, a mud-feeding round hole 152 and a muddy water bypass block. 3 ', a mud feed through-hole 15 which is perforated below the inside of the fixture 110, and into which a mud feed pipe 194 (see FIG. 38) described later can be inserted.
4. It is constituted by a mud feed pipe 14 connecting the front part of the mud feed through round hole 154 and the muddy water bypass block 3 '. Note that an oil seal 1 is provided between the inner peripheral portion of the mud feed through round hole 152 of the second partition wall 105 and the outer peripheral portion of the connection circular pipe 153.
55 are attached. Further, an oil seal 156 is mounted between the inner peripheral portion of the mud feed through round hole 152 of the second partition wall 105 and the outer peripheral portion of the mud feed pipe 16. Further, oil seals 157 and 158 are attached to the inner peripheral portion of the mud feed through round hole 154 and the outer peripheral portion of the mud feed pipe 14. The sludge drainage system 170 includes muddy water supplied from the muddy line 150,
This is for discharging earth and sand excavated by the cutter 131, and for flowing muddy water from left to right in FIG. As shown in FIG. 37, the check valve 147 supplies a high-concentration liquid containing a high amount of plugging material, thereby forming a mud film on the ground around the propulsion pipe 303 and stabilizing the face. Things. An example of the size of the excavator body 4 is a length of 902 mm and a diameter of 242 mm.

The connecting body 1 connected to the above-described excavator body 4
80 will be described with reference to FIGS. Connector 180
Has a front connection plate 186, as shown in FIG.
83, a through-hole 184 is formed on the lower left side, and a through-hole 185 is formed on the lower right side. Further, a rear connection plate 187 having a similar structure is provided (see FIG. 40). Lightweight electric wire 1
8a and 19a are passed through the through hole 181, and the lightweight hydraulic hose 8
a can be passed through the through hole 182. Center rotation axis 18
8 into the through-hole 183 and the thrust transmission shaft 191a
To the nuts 193 provided at both ends of the front connection plate 1
The bolt 192 is screwed through the screw 86, the mud feed pipe 194 is inserted into the through-hole 185, and the mud discharge pipe 195 is inserted into the through-hole 1
84, and the same is applied to the rear connection plate 187, and further, the holding plates 197, 198 are attached to the thrust transmitting shaft 191a.
191c, a mud feeding pipe 194, a mud discharging pipe 195, and the like, thereby forming a single body. Guide bolt 19
Reference numerals 6a to 196e guide the connection of the connecting body 180 to the excavator body 4. As shown in FIG. 41, the connecting body 180 is detachably connected to the main pushing device 306 via the attachment 366, but the details will be described later. In addition, as an example of the size,
The length of the propulsion tube 303 is 1000 mm and the diameter is 216 m
m, length of connecting body 180 is 1050 mm, diameter is 193
mm. OILES Metal 199 is a bearing.

The operation of the muddy water bypass device 1 'in the excavator will be described. As shown in FIGS. 32 and 33, in the above-mentioned muddy water passing state, the valve element 5 ′ is disposed in a parallel position parallel to the axial direction, and sends muddy water from the mud pipe 14 as shown by a two-dot chain line arrow. Mud holes 32 ', 42', chambers 2a ', 2b',
It is sent to the mud pipe 16 through the mud holes 34 'and 44'.
The muddy water containing the earth and sand from the drainage pipe 17 is discharged from the drainage hole 3.
3 ', 43', chambers 2a ', 2b', mud holes 3
It is sent to the sludge pipe 15 via 5 ', 45'.

On the other hand, in the bypass state, as shown in FIG. 33, the hydraulic cylinder 8 'is driven to advance the piston rod 80' and the extension rod 81 ', and the lever 7'
Is rotated 90 degrees. Then, the valve element 5 'is at a position orthogonal to the axial direction, and as shown by the two-dot chain line arrow, the mud pump 1
Muddy water from mud 4, mud holes 32 ′, 42 ′, chamber 2
a ', 2b', but the direction is 180
The drain pipe 1 through the drain holes 33 'and 43'.
Sent to 5.

The muddy water bypass device 1 'thus alternately switches between the muddy water passing state and the bypass state in order to receive the sediment pressure to avoid the collapse of the sediment, and to prevent the sediment from breaking down in the mud pipe. This is to avoid blockage. That is, as shown in FIG. 32, the propulsion pipe 303 is propelled with the valve body 5 ′ being in a position parallel to the axial direction and passing muddy water, and after one propulsion, the valve body 5 ′ as shown in FIG. The muddy water is switched to the bypass state with the vertical position in the axial direction, the muddy water is short-circuited (short-circuited), the clogged sediment flows, and the pipe is emptied. After that, the propulsion pipe 303 is disconnected and connected.
When the muddy water is once stagnated in the pipe at the time of additional connection of the propulsion pipe 303 (setup change) and the propulsion of the propulsion pipe 303 is resumed, the pressure in the pipe before the muddy water bypass block 3 ′ becomes higher than that of the muddy water bypass block 3 ′. Since the gate is opened when the balance with the back (cutting blade pressure) is achieved, the risk of ground collapse and blockage in the pipe due to the impact of the mud feeding (shock) can be avoided. The detected values of the pressure transmitters 18 and 19 provide an indication for measuring the switching timing of the muddy water bypass block 3 '.

According to the shaft bypass devices 1, 201, 501 of the first to third embodiments described above,
The following effects occur. (A) The structure of the shaft bypass device 1, 201, 501 can be simplified and downsized. (B) Since the bypass is switched by the hydraulic cylinder 8 according to a command from the central control panel 310, the operation is easy. (C) The number of operations is reduced, and no trouble is caused by an operation error. (D) It contributes to the overall efficiency of propulsion work. (E) The space occupied in the starting shaft 304 is reduced, and construction with a small shaft is enabled.

Next, a description will be given of a muddy water pressurizing small-diameter pipe propulsion apparatus 301 including the excavator body 4 to which the shaft bypass apparatus 1 is applied, with reference to FIGS. 27, 42, and 43. FIG. This is because a small-diameter pilot pipe 302 made of metal (L = 600 mm as an example of a size, φ60 mm: also called a leading pipe) and a large-diameter propulsion pipe 303 (generally L = 800 mm to 1,000).
In order to propel about 0 mm (approximately about 150 to 500 mm), a stand 305 installed on the bottom surface 304 a of the starting shaft 304 (about 1500 mm in inner diameter), a hydraulic motor for excavation fixed on the stand 305, and a main jack are operated. Hydraulic main pushing device 306 (full stroke 1030m
m), a measuring instrument 307 including a transit for measuring the propulsion state of the pilot pipe 302, and a device such as a hydraulic pump, an electric motor, and a pressure regulating valve for driving the main pushing device 306. And a simple mud treatment device 309 that is installed on the ground, adopts mud as a working fluid, pressurizes the mud, and circulates the mud, and a hydraulic mud treatment device 309 that controls the mud pressurized state. Central operation panel 310 including a logical operation circuit, operation buttons such as a switching button of the shaft bypass device 1, a display unit, and the like.
And a hydraulic unit 314 in which devices such as a hydraulic pump, an electric motor, and a pressure regulating valve are incorporated to supply hydraulic pressure to the hydraulic cylinders 8 and 8 ', a lubricating material injection device 321 and a display meter and display for displaying various parameters. It is composed of a meter box 330 including a device, a pilot lamp and the like. The meter box 330 includes a face-side pressure meter, a bypass-side pressure meter, a flow meter, and a bypass valve open / close display unit (a lamp or the like). Furthermore, the simple muddy water treatment device 30
At the outlet of 9, a mud pump 311 is installed, and a rigid mud pipe 312 (for example, a steel pipe can be used, but a hard polyvinyl chloride pipe or the like may be used). Muddy water can be supplied. The shaft bypass device 1 stops the simple muddy water treatment device 309 once when the propulsion pipe 303 is additionally connected,
Since it takes time for the muddy water to settle and to stabilize the muddy water again, the flow rate of the simple muddy water treatment device 309 is always maintained even when the propulsion pipe 303 is additionally connected. On the other hand, the earth and sand excavated by the excavator body 4 and the muddy water are connected to each other by a connecting body 180, a rigid drain pipe 315 (for example, a steel pipe can be used, but a hard polyvinyl chloride pipe or the like may be used), the shaft bypass device 1, and a drain pipe. The water can be discharged to the simple muddy water treatment device 309 via the pump 316 or the like and returned. The gantry 305 supports the excavator body 4, the propulsion pipe 303, and the like, and includes a level jack, a reaction force plate, and a front jack.

As mentioned above, this shaft bypass device 1
This is a device for changing the flow of muddy water sent from the simple muddy water treatment device 309 on the ground.
The excavator body 4 is switched by switching the flow of mud
The muddy water can be immediately returned (returned) from the shaft bypass device 1 to the simple muddy water treatment device 309 without returning the muddy water. The shaft shaft bypass device 1, the mud pump 311, the mud pump 316, and the like are generally more efficient to be installed in the starting shaft 304, but if they cannot be inserted,
It can also be installed on the ground. Simple muddy water treatment equipment 309
Mainly supplies muddy water to the excavator body 4, receives the muddy water and the earth and sand excavated by the excavator body 4 from the excavator main body 4, separates the muddy water and the earth and sand, and excavates the separated muddy water. It is supplied to the machine body 4 by being refluxed (recycled), and is specifically constituted by a stirrer, a muddy water treatment machine, a sedimentation layer, an adjustment layer and the like. Although this simple muddy water treatment apparatus 309 is constantly operated during operation, muddy water is applied to a vibrating sieve (not shown) only when a slurry pump (not shown) works to pump muddy water.

A sludge flow meter 317 is installed in the sludge pipe 315 near the simple muddy water treatment apparatus 309, and signals measured therefrom or various signals from the main pushing device 306, the pressure transmitters 18, 19, and the like are centralized. Various signals such as drive signals to the simple muddy water treatment device 309, the main pushing device 306, the hydraulic cylinders 8 and 8 ′, the hydraulic unit 308 and the like are output from the central operation panel 310. It is. Also, as the type of the propulsion pipe 303,
Various types of pipes, such as a vinyl chloride pipe, a steel pipe, a fume pipe, and a resin pipe, may be used. FIG. 42 shows an example of the propulsion process of the pilot pipe 302. Each of the pilot pipe 302 and the propulsion pipe 303 has a structure (in some cases, a thread is cut on the peripheral surface of an end portion) so that the pilot pipe 302 and the propulsion pipe 303 can be detachably connected in the axial direction.

As shown in FIG. 43, the vehicle 31 on the ground
8 includes a connector 180, a pilot pipe 302, and a propulsion pipe 3
03, the excavator body 4, the generator 319, the crane 320, etc. are loaded, and the construction area is surrounded by a fence 324. The crane 320 transfers the pilot pipe 302, the propulsion pipe 303, the connecting body 180, and the like to the starting shaft 304, propells the pilot pipe 302 by connecting the pilot pipe 302 in the first stage, and pushes the pilot pipe 302 in the second phase. Drilling machine body 4
Is connected and propelled, and then the propulsion pipe 30
3 and the connecting body 180 can be propelled while adding them.

The original pushing device 306 shown in FIG. 41 is an example, and various other modes are possible. The main pushing device 306 includes two rails 360 arranged in parallel at a predetermined interval and a sliding portion 36 that can slide along the rails 360.
1, a reciprocating part 362 suspended between the sliding parts 361,
The hydraulic cylinder 363 forcibly propelling and retreating the reciprocating part 362, the hydraulic motor 364 provided above the hydraulic cylinder 363, the pilot pipe 302, the excavator body 4, and the end of the connector 180 can be detachably fixed. A rotation support member 365 fixed to a reciprocating part 362 for propelling the rotating parts while rotating, and an attachment 366 fixed to the reciprocating part 362 for detachably fixing the propulsion pipe 303, and a swivel joint (not shown). Is connected to the mud feeding pipe 342 and the mud discharging pipe 345 (see FIG. 40). The reason why these swivel pipe joints are adopted is that the mud feeding pipe 194 and the mud discharging pipe 195 (see FIG. 27) need to have a flexible structure because they reciprocate by propulsion. In addition, the reciprocating portion 362 protrudes the connecting body 180, so that a strong propulsive force can be generated in the excavator body 4. For other detailed structures of the main pushing device 306, refer to Japanese Patent Application Laid-Open No. 10-46984. Other small hydraulic type main pressing devices can also be adopted.

The entire construction procedure will be described later in connection with the muddy water pressurized small-diameter pipe propulsion method, but here, the general operation will be described. As shown in FIG. 41, the pilot pipe 302 is attached to the rotation support member 365, and based on a command from the central operation panel 310 shown in FIGS. The hydraulic cylinder 363 is driven by an operation unit (not shown) 306,
By rotating the rotation support member 365, the reciprocating part 362 is propelled while rotating the pilot tube 302.
When the pilot tube 302 is pushed in, the pilot tube 30
2 is removed from the rotation support member 365, and the reciprocating part 362 is retracted. The pilot pipe 302 is added and connected to the rotation support member 365. Thus, the pilot tube 302
Is repeated to reach the reaching shaft 385 (see FIGS. 48 to 53). At this stage, the muddy water is not pressurized by the simple muddy water treatment device 309 or the like.

After the first step is completed, the connection between the pilot tube 302 and the rotation support member 365 is released, and the reciprocating part 362 is retracted. A pilot pipe fitting 132 is connected to the rear part of the pilot pipe 302, and both ends of the excavator body 4 in FIG.
2 and the main pushing device 306. Spline female part 14
1 is spline-coupled to the rotation support member 365, and the attachment 366 is connected to the fixture 110.
The mud feed through round hole 154 and the mud discharge hole (not shown) are connected to the mud feed pipe 342 and the mud discharge pipe 345 via a swivel pipe joint.

When the connection of the excavator body 4 as described above is completed, the vertical shaft bypass device 1 and the muddy water bypass device 1 'in the excavator are made to pass through by a command from the central operation panel 310 in FIG. The apparatus 309, the mud pump 311 and the drain pump 316 are driven, and as shown in FIGS. 27 and 41, the mud is transferred from the simple mud treatment apparatus 309 to the mud pipe 312, the shaft bypass apparatus 1, the mud pipe 332,
The soil and sand excavated by the cutter 131 of the excavator body 4 are sent to the front chamber 130 via the mud pipe 342, the connector 180, the excavator muddy water bypass device 1 ', and the like. ′, Through the connecting body 180, the drain pipe 345, the drain pipe 335, the shaft bypass device 1, the drain pump 316, and the drain pipe 315 to return to the simple mud treatment device 309,
Then, processing such as separation of muddy water and earth and sand is performed, and the muddy water is circulated to the front chamber 130 of the excavator body 4.
At this time, in order to facilitate and stabilize the propulsion, the central operation panel 310 controls the power of the mud pump 311 and the mud pump 316 based on the output of the mud flow meter 317 and the like to thereby control the muddy water. Optimized flow rate.

As shown in FIG. 32, in the excavator main body 4, the valve body 5 'is set in the parallel position, and the rotation support member 365 of the reciprocating portion 362 is driven to rotate by the action of the hydraulic cylinder 363, so that the center rotation is performed. The rotational power is transmitted to the cutter 131 via the shafts 134, 112, and 188, and the cutter 131 is rotated integrally. Mud sending water from the mud sending system 150 and the cutter 131
The earth and sand excavated by the above are discharged from the sludge drainage system 170. At the same time, the excavator main body 4 is pressed and driven by the function of the hydraulic cylinder 363. Although the holding plates 197 and 198 (see FIG. 38) have a structure that is not linked to the rotation of the center rotation shaft 188, they may be slightly rotated. Anything other than the center rotation shafts 112, 134, 188 and the cutter 131 goes straight.

When the start of the excavator body 4 is completed, the muddy water bypass device 1 ′ in the excavator is switched to the bypass state by a command from the central operation panel 310, and then the vertical shaft bypass device 1 is switched to the bypass state. Switch to
The return of the muddy water to the mud feeding system 150 and the mud discharging system 170 is stopped, and the insides of the mud feeding system 150 and the mud discharging system 170 are appropriately cleaned. If the specific gravity of the mud becomes higher, a negative pressure is applied to the mud pump 316 rather than the sedimentation speed in the pipe, and the mud in the pipe is pulled, or an air inlet is provided on the mud feeding side of the shaft bypass device 1 to discharge the mud. If air is injected from the mud feed system 150 while operating the pump 316, the inside of the pipe is cleaned. Generally, even when muddy water remains in the pipe, when the connection between the excavator main body 4 and the main pushing device 306 is cut, the muddy water flows out into the starting shaft 304. After that, the excavator body 4 and the reciprocating part 362 (see FIG. 41) are dissociated, and the reciprocating part 362 is retracted. Connection body 1 at the rear end of machine 4
80 and the front end of the propulsion pipe 303 are connected, and the connecting body 180 and the rear end of the propulsion pipe 303 are connected to the reciprocating part 362 via the attachment 366. Then, the shaft 1 is switched to the passing state. Next, the muddy water bypass device 1 'in the excavator is switched from the bypass state to the passing state.
It is performed after the internal muddy water pressure and the pressure on the face side are balanced. That is, when the muddy water is returned from the muddy water bypass device 1 ′ in the excavator and the muddy water 170 and the muddy water is returned from the muddy water bypass device 1 ′ in the excavator and the muddy water in the pipe flows to some extent, the water pressure also increases, When the pressure difference from the face side becomes approximately 0.1 kg / cm ² , the muddy water bypass device 1 ′ in the excavator is switched to send muddy water, the valve body 5 ′ is set in a parallel position, and the excavator body 4 (also referred to as a leading conductor) ), The propulsion pipe 303 and the connecting body 180 are propelled.

The muddy water pressurizing step is performed by
3 and the connecting body 180, while reaching the arrival shaft 385.
Repeat until. In the present embodiment, the 50 propulsion tubes 303 and the connecting body 180 are connected,
The number of connections can be appropriately selected according to the scale of the construction. In the case of blockage or the like, the muddy water may flow backward.

Next, the construction procedure of the muddy water pressurizing small-diameter pipe propulsion method according to the embodiment will be described with reference to FIGS.
Here, an example in which the muddy water pressurizing small-diameter pipe propulsion device 301 shown in FIGS. 41 to 43 is applied is shown, but various modifications are also possible. The basic principle of this method is that
(Embedded pipe) A PVC pipe with an inner diameter of 200 mm to 450 mm is propelled and installed. A main pushing device 306 is installed in the starting shaft 304, and the muddy water adjusted by the simple muddy water treatment device 309 on the ground is returned to the excavator body 4. Excavation is performed by the cutter 131 while stabilizing the face, and the excavated earth and sand is discharged by the mud pump 3.
The fluid is transported to the ground at 16 etc. In this method, 1
The process is a press-fitting method with a temporary pipe and the second process is a muddy pressurized excavation method. The construction method is steel readhead 3 in the first process.
After performing press-fitting promotion to the reaching shaft 385 while correcting the direction using 02a, the excavator body 4 (lead conductor) is propelled while excavating by the original drive method using the pilot pipe 302 of the second process as a guide, and the connecting body 180 is formed. In this method, a low-load bearing pipe such as a PVC pipe is propelled and buried by bearing a propulsion load, bearing an initial resistance, and bearing only the outer surface resistance of the soil to the propulsion pipe 303. Propulsion tube 303 used here
Is a PVC pipe, φ200 ・ φ250 ・ φ300 ・ φ3
The standard is 50/400/450 and 250 for the fume tube. As for the propulsion extension, one span is 70m as standard, and the maximum is about 80m depending on the soil quality. The excavator body 4 is of a two-part system, and can be collected in the first human hole. Construction is possible even with soil with a lot of water by the muddy water bypass device 1 'in the excavator.

(1) Preparatory work (Step S101: FIG. 44)
The start shaft 304 shown in FIG. 46 is constructed. First, FIG.
As shown in the figure, the lower manhole frame 371 having the water stop 372 is swirled and pressed into the excavator 373 by the swirling press machine 370.
Excavates earth and sand. An intermediate manhole structure 374 is connected to the lower manhole structure 371 by welding. The intermediate manhole frame 374 is swirled and pressed by the swirl press machine 370,
The excavator 373 excavates earth and sand. Intermediate manhole structure 3
A cylindrical connection casing 375 made of steel is detachably connected to the top of the connection casing 74. The underwater concrete 3 is formed so that the bottom surface 304a is formed at the bottom of the lower manhole frame 371.
76 is cast. Similarly, a reaching shaft 385 is constructed. Then, preparation for carrying in the equipment is performed. Perform a survey. That is, the pipeline center is marked near the starting shaft 304. Also, the propulsion plan height and the machine installation height position are marked by level survey.

To explain the above in a supplementary manner, as shown in FIG. 46, the lower manhole frame 371 has a steel blade-shaped member 379 fitted and fixed to the lower end of a cylindrical reinforced concrete 378, and the steel upper end edge is made of steel. Are fitted and fixed. At the lower end of the blade-like member 379, a plurality of saw teeth are arranged circumferentially. The inner peripheral surface of the lower end of the reinforced concrete 378 is tapered in order to reduce the resistance at the time of press-fitting. The above elements are integrally manufactured in a manhole manufacturing process to form a lower manhole body 371. Waterstop 372 with filter and rubber
Is attached to the lower manhole frame 371 and is pre-built, so that when starting the small-diameter propulsion method, water and earth and sand do not enter the manhole, and chemical liquid injection work is not required and smooth small-diameter propulsion You can do the construction. The intermediate manhole body 374 is formed by fitting steel cylindrical members 382 and 383 to upper and lower ends of a cylindrical reinforced concrete 381, respectively. Each of the elements is manufactured integrally in a manhole manufacturing process,
An intermediate manhole structure 374 is provided. It should be noted that these are disclosed in detail in Japanese Patent Application Laid-Open No. 9-6020, and reference is made thereto. The inner diameter of the starting shaft 304 is φ1,500 mm (φ1,500 to φ1,500 in the present embodiment).
A range of about 2,000 mm is preferable). The construction of the reaching shaft 385 is performed in the same manner, but a conventional liner plate method or the like may be used, and the inner diameter may be set arbitrarily.

(2) Wellhead (S102: See FIG. 44) A wellhead is provided in the starting shaft 304.

(3) Mechanical installation (S103: see FIG. 44) The gantry 305 and the main pushing device 306 are installed in the starting shaft 304 at a planned gradient and a planned direction (not shown). That is, the main pushing device 306 is suspended in the starting shaft 304 in the direction of the planned propulsion pipe center (not shown). Fine adjustment is made to the marked position on the inner wall surface of the manhole with a spacer (not shown) or the like, and the original pressing device 306 is temporarily installed. The pipe gradient is measured by a level (not shown) or the like, and the pipe core of the main pushing device 306 is matched with the planned propulsion pipe center. After the installation of the main pushing device 306 is completed,
05 and the main pushing device 306 are sufficiently fixed.
5 and the manhole wall are fixed by welding or jacking.
The reaction force of the main pushing device 306 is taken from the manhole wall. Here, when the water stop 372 is directly assembled to the manhole frame, the steps of mirror cutting and injection of the chemical solution are unnecessary.

(4) Mirror cutting (S104: see FIG. 44) Mirror cutting is performed.

(5) Soil Improvement (S105: See FIG. 44) If necessary, the ground is improved by injecting a chemical solution or the like.

(6) Pilot Pipe Propulsion (S106: See FIG. 44) As the first step of the propulsion, the pilot pipe 302 is propelled on the planned propulsion line by a consolidation method using a direction correcting device (not shown) (FIG. 44). 49 and 50). Promotion is starting shaft 3
From 04, the read head 302a (see FIG. 42) is the lead, and the pilot tube 302 is subsequently connected and propelled while rotating. The direction is confirmed by visually checking the lead lamp in the read head 302a with the level or the detector 307 from behind the original pressing device 306. Further, when the pilot tube 302 is shifted from the planned promotion and the direction needs to be corrected, the rotation of the pilot tube 302 is stopped, the tip of the read head 302a is adjusted in the correction direction, the propulsion is performed, and the pilot tube is restored to the planned promotion. Then, the propulsion is performed while rotating the pilot tube 302.

(7) (8) Propulsion pipe propulsion and mud pressurization (S
107, S108: See FIG. 44) As the second step of the propulsion, the pilot pipe 30 of the first step is used.
2 has reached the reaching shaft 385, the pilot tube fitting 1 is attached to the rear end of the last pilot tube 302 in the starting shaft 304 among the pilot tubes 302 penetrated in the previous process.
32, the excavator main body 4 is connected to the rear end of the pilot pipe 302, the rear end of the excavator main body 4 is connected to the main pushing device 306, and mud feeding and the like are performed by the simple muddy water treatment device 309 and the like. The excavator body 4, while discharging mud and returning muddy water,
The propulsion pipe 303 and the connector 180 are propelled (see FIGS. 50 to 52). On the other hand, on the arrival shaft 385 side, the pilot pipe 302 and the like are collected. Thus, the propulsion pipe 303
And the propulsion is performed while adding the connecting body 180. Then, about 50 propulsion tubes 303 and connecting bodies 180 are propelled.

(9) Wellhead (S109: See FIG. 44) A wellhead is provided in the starting shaft 304.

(10) Mirror cutting (S110: see FIG. 44) Mirror cutting is performed, and the machine body 4 is collected on the reaching shaft 385 side.

(11) Ground improvement work (S111: see FIG. 44) If necessary, ground improvement is performed by injecting a chemical solution or the like.

(12) Removal of equipment in the pipe (S112: see FIG. 44) Removal of the connector 180 and cleaning of the pipe are performed. The connecting body 180 is collected on the starting shaft 304 side and disassembled (FIG. 53).
reference). The main pushing device 306 and the like are removed, mortar for height adjustment is cast, and the invert 377 is installed (FIG. 5).
4).

(13) Removing the Machine (S113: See FIG. 44) The machine such as the gantry 305 and the main pushing device 306 is removed.

(14) Construction of the upper part of the manhole (S114:
(See FIG. 44) The upper manhole frame 3 is placed on the intermediate manhole frame 374.
Attach 87. That is, the adjusting unit 388 and the side lump 38
9. Attach the receiving frame 390, the lid 391, and the step 392. FIG. 54 shows the construction thus constructed. The connecting casing 375 (see FIG. 46) and the intermediate manhole body 374
The connection casing 375 is separated from the intermediate manhole body 374 and removed after the connection is released and the earth and sand is backfilled.
Complete construction work.

As shown in the standard process chart shown in FIG. 45, process control is performed.

(Second Example Mud-Pressurized Small-Diameter Pipe Propulsion Apparatus)
A muddy water bypass device in an excavator applied to a muddy pressurized small-diameter pipe propulsion device of a second example shown below will be described. This example has the same configuration as the first example, but changes the configuration around it. Therefore, the description of the muddy water bypass device 1 ′ in the excavator will be applied mutatis mutandis, and other configurations will be described. FIG. 55 to FIG.
This will be described with reference to FIG. This mud pressurized propulsion connector is
The configuration is partially modified to make the first example more compact. Therefore, the common configuration will not be illustrated, and the description will focus on different configurations. Note that the part numbers are numbers to which number 1000 is generally added. First, the first connector 1001 is shown in FIGS.
This will be described with reference to FIG. The first connector 1001 includes a front connection member 1008 (see FIG. 55) and a rear connection member 1009 (see FIG. 56) at the front end and the rear end, respectively.
They are truncated at the bottom. Front connection member 100
8 has through holes 1081 and 1082 on the left and right sides, a round hole 1083 at the center, through holes 1084 and 1085 (half holes communicate with each other) at the bottom, and a through hole 1086 at the top. A similar hole is provided in the rear connection member 1009. The thrust transmitting shaft 10 is inserted into the through-hole 1083.
06 is fixed at the front end by welding.
6, a center rotation shaft 1002 (see FIGS. 57 and 58) is inserted, and through holes 1084, 10
Reference numeral 85 denotes a cylindrical mud feed pipe 1003 and a cylindrical mud discharge pipe 1 respectively.
004 is inserted and welded, and the front end of a cylindrical propulsion transmission shaft 1005 is inserted and welded into a through hole 1086 at the top, and each is provided. Similarly, their rear ends are fixed to the rear connecting member 1009.

Further, the holding member 1010 is formed as shown in FIG.
As shown in (c), the front connection member 10 is made of a round, small-diameter plastic (for example, MC nylon).
08 are provided at four locations inside the peripheral portion. The holding member 1010 is formed in a cylindrical shape and has a bolt hole 10
12 are provided, and the peripheral surface is tapered. FIG.
As shown in FIG. 8, a bolt 1014 and a washer 1015 are attached to the bolt hole 1012, and a part of the outer peripheral portion of the holding member 1010 is fixed so as to slightly protrude from the outer peripheral surface side of the front connection member 1008. . Similarly,
Round, small-diameter plastic (for example, MC nylon)
The holding member 1011 of FIG.
009 is provided inside the peripheral portion. Holding member 101
A part of the outer peripheral portion of the rear connecting member 1009 is arranged so as to slightly protrude from the outer peripheral surface side of each of the rear connecting members 1009. The holding member 1010 and the holding member 1011 allow the first connection member 1001 to be held inside the propulsion tube 1505 when the first connection member 1001 is inserted into the propulsion tube 1505 formed of plastic, for example, vinyl chloride resin. It was made. Thereby, rubbing and the like can be prevented.

The center rotating shaft 1002 made of a hollow body shown in FIGS. 61 (a) to 61 (c) is connected by welding by fitting a short cylindrical male spline portion 1022 to the front end of the center rotating tube 1021. Things. Male spline section 1022
Is provided with a circular square spline 1024 at the front end thereof. The square spline 1024 has a rectangular shape and a predetermined number of splines formed on the outer periphery, and projects outward from the front connection member 1008 in the axial direction. Also, the center rotation axis 1002 is
A short cylindrical female spline portion 1025 is fitted to the rear end of the connector 21 and connected by welding. The female spline portion 1025 is communicated with the outside, and has a predetermined number of rectangular splines 1027 (bosses) on its inner peripheral surface. This center rotation shaft 1002 is
006 can be inserted. As shown in FIG. 56, a holding portion 1028 is provided at the end of the propulsion transmission shaft 1006 so that the center rotating tube 1021 can be held.

The sludge pipe 1003 and the sludge pipe 1004 (FIG. 5)
7) is a long circular tube as shown in FIG. 56, and is set to have substantially the same length as the central rotation axis 1002. Collars 1023 and 1026 forming the outer periphery of both ends of the mud feed pipe 1003 are annular first joint pipe 1031 (see FIG. 60) and second joint pipe 1032, respectively.
(Having the same structure as the first joint pipe 1031) is formed so as to be able to be inserted in a detachable manner. As shown in FIG. 60, four annular grooves 1033 are provided on the outer peripheral surfaces of the first joint pipe 1031 and the second joint pipe 1032, and the O-rings 1035 are fitted to them. A fitting groove 1036 is formed in the front. A similar joint pipe can also be inserted into and removed from the collar 1029 (see FIG. 55) of the drainage pipe 1004, so that illustration and description are omitted.

As shown in FIG. 56, the driving force transmission shaft 1005 has a circular tube 1051 and its front end is inserted into the front connection member 1008 and fixed by welding or a bolt and nut. Similarly, the rear end of the circular tube 1051 is also inserted into the rear connection member 1009 and fixed by welding or a bolt and nut. here,
The number of the propulsion transmission shafts 1005 and 1006 is two in total, but the number is not limited to this, and the number can be appropriately set.

FIG. 55 to FIG.
This will be described with reference to FIG. This is a plate-like body having a constant thickness in the axial direction, and is formed on a face plate having two vertical surfaces in the front and rear directions.
At 82, lightweight electric wires 1418a and 1419a (FIG. 75)
Through the through hole 1081 and the lightweight hydraulic hose 8a '
(See FIG. 35) can be passed through the through-hole 1082. Bolts 1088a to 1088e are screwed into bolt through holes (not shown), respectively. When the first connector 1001 is connected to an excavator body 1013 described later, the first connector 1001 is fixed with the bolts 1088a to 1088e. The center rotation shaft 1002 is configured to be housed inside a tubular propulsion transmission shaft 1006.
The thrust transmitting shaft 1006 can be inserted into and fixed to the through-hole 1083 of the front connection member 1008 and the through-hole 1083 of the rear connection member 1009.

The first connecting member 1001 includes a rear connecting member 1009 having the same structure as the front connecting member 1008 (see FIGS. 56 and 64). Since this is in accordance with the description of the front connection member 1008, a detailed description thereof will be omitted, and a number obtained by adding the number 10 to the corresponding part number will be illustrated. The holding member 1011 is a holding member 10
It has the same structure as 10. However, the first connector 1
The structure is substantially the same except that a hook groove 1120 (see FIG. 57) is provided for hooking a connecting hook 1110 (see FIG. 57) for detachably connecting the 001 and the second connector 1201. . The connection hook 1110 simplifies the work of connecting the first connection body 1001 and the second connection body 1201 or the work of connecting the second connection bodies 1201 to each other.

This connecting hook 1110 is shown in FIG.
As shown in (d), when viewed from a plane, the shape is rectangular, the upper surface is tapered on both sides, and rectangular parallelepiped grooves 1111 and 1112 are cut off on both side surfaces.
The U-shaped groove 1113 extends through in the short direction. The length of the rectangular parallelepiped grooves 1111 and 1112 is larger than the total thickness of the front connection member 1008 and the rear connection member 1009. As shown in FIG.
0 is fitted into the U-shaped hook groove 1120 from above. Therefore, when pushing in the propulsion pipe 1505 made of PVC, the rear connection member 1009 of the first connection body 1001 and the front connection member 120 of the second connection body 1201 are pressed.
8, or the front connection member 120 of the second connection body 1201
8 and the rear connection member 1209 can be brought into close contact with each other by pressure. On the other hand, when the first connector 1001 and the second connector 1201 are pulled out, the front connector 1008 is pulled out.
And the rear connection member 1009 are separated from each other.

The second connector 1201 is shown in FIGS.
As shown in FIG. 2, since the structure is substantially the same as that of the first connection body 1001, only the numbers obtained by adding the 200 numbers to the corresponding part numbers are shown in the figure, and the description is generally omitted. However, the difference is that the above-described hook groove 1120 is also provided in the through circular holes 1281 and 1282 of the front connection member 1208. Also, as shown in FIG.
The structure of 231 is slightly different from the case of FIG. 60, and four annular grooves 1233 are formed on the front and rear sides. Mud pipe 1
The protruding length of 203 and the exhaust pipe 1204 is slightly shortened. The rear connection member 1209 is used in a pair with the front connection member 1208, and has a similar structure corresponding to the rear connection member 1009.

Further, the rear ends of the first connector 1001 and the second connector 1201 can be detachably connected to the main pressing device 1508 via an attachment 1566 (see FIGS. 99 and 100). Has become. The propulsion pipe 1505 is provided with a main body mounting bracket 1606 (FIG. 99).
) Can be removably connected to the main pushing device 1508 via the main unit.

The procedure for assembling the first connector 1001 will be described. Propulsion transmission shafts 1005, 1006, mud pipe 100
3. Connect the sludge pipe 1004, the first John Int pipe 1031 and the second joint pipe 1032 to the front connecting member 100, respectively.
8. Insert the rear connection member 1009 into the corresponding hole. Similarly, it is inserted into the rear connecting member 1009, and assembled in the state as shown in FIGS. Then, the holding member 10
Install 10 and 1011. The center rotation shaft 1002 is inserted into the hollow portion of the driving force transmission shaft 1006. Propulsion transmission shafts 1005, 1006, mud pipe 1003, mud pipe 1004
Are fixed to the front connection member 1008 and the rear connection member 1009 by welding to be integrated. Thus, the first connector 1001 is assembled in advance as one connector. The second connector 1201 is also assembled in advance in a similar manner.

The first connector 1001 described above is first connected to the rear end of the excavator body 1013, and the second connector 121 is connected to the rear end of the first connector 1001.
01 is connectable, and the second connector 1
The second connector 1201 can be connected to the rear end of the first connector 201 one after another. That is, the first connector 1001 is the first intermediate connector, and the second connector 1201 is the second and subsequent intermediate connectors, both of which are intermediate connectors.
The first connector 1001 has a slightly different structure for connecting to the excavator body 1013.

(Structure of Excavator Main Body 1013 of Mud Pressurized Small Diameter Pipe Propulsion Device of Second Example) The excavator main body 1013 shown in FIGS. 75 to 98 will be described. It is divided into a front cutter section 1300 and a rear in-machine bypass section 1301, and a closed type in-machine excavator muddy water bypass device 1401 (see FIG. 75) is disposed inside the in-machine bypass section 1301 at a position below the central axis. Have been. Since this is a sealed type, it can be protected and sealed from external pressure. The casing of the excavator body 1013 includes a blade member 1302, a fixing plate 130
3, first partition 1304, second partition 1305, outer tube 130
6, formed by sequentially connecting rear end partition walls 1307. Hereinafter, these housings will be briefly described. In addition, as for the method of cutting the cross section, the cutting method is appropriately changed for each location in order to show all the components, and the hatching of the cross-sectional view is unnecessarily complicated in this example, so that it is omitted as appropriate. The detailed structure will be described below with reference to FIGS.

The internal structure of the machine 1013 will be described. At the center of the excavator main body 1013, the central rotation shaft 1312 is rotatably supported by the fixed plate 1303, the first partition 1304, and the second partition 1305. That is, between the center rotation shaft 1312 and the first partition 1304,
An oil chamber 1313 and an oil chamber 1314 are formed, and an oil supply path 1304g and an oil supply path 1304h are respectively provided (see FIG. 75).
Are in communication. Further, inside the oil chamber 1313,
A mechanical seal 1320 is provided on the outer circumference of the central rotation shaft 1312.
And a screw hole (not shown). Oil chamber 131
The double-row tapered roller bearing 1322 is provided on the outer periphery of the central rotation shaft 1312 inside the inside 4. Behind the double row tapered roller bearing 1322, a nut 1323 and a washer 1324 are provided.
Is provided. A female screw 1325 and an oil seal 1326 are provided on the rear side. First partition 130
A fixing plate 1327 is fixed to a rear portion of the fourth member 1 with bolts 1328 so that oil does not leak from the first partition 1304 to the central chamber 1329.

The front chamber 1330 has a central rotating shaft 1
A cutter 1331 fixed to the front end of 312 is provided, and a pilot pipe fitting 1332 is fixed to a central portion in front of the cutter 1331. The pilot pipe mounting member 1332 is capable of mounting a pilot pipe 1502 and a read head 1502a, which will be described later.
This is a structure that prevents transmission to a. Center rotation shaft 13
12, a spline male portion 1333 is formed at the rear end,
The spline female portion 1335 of the central rotation shaft 1334 is splined in the axial direction. Oiles metal 1336 as a bearing is arranged on the outer peripheral portion of the spline female portion 1335 and the inner peripheral portion of the second partition 1305.
The rear end of this oilless metal 1336 is a flange 133
7, and receives the thrust of the central rotation shaft 1334. The space between the fixed plate 1303 and the first partition 1304 is sealed by an O-ring 1338. First partition 130
4 is sealed by an O-ring 1339 between the rear end and the front end of the second partition 1305. In addition, the first partition 1304
The space between the inner peripheral portion of the rear end and the outer peripheral portion of the fixed plate 1327 is sealed by an O-ring 1340. Further, the second partition 1305
An O-ring 1341 seals between the rear end outer peripheral portion and the front end inner peripheral portion of the outer tube 1306.

A female spline portion 1342 is formed at the rear end of the central rotary shaft 1334, and is spline-coupled to a male spline portion 1022 (see FIGS. 55 and 56) formed at the front end of the central rotary shaft 1002. Can be. Oiles metal 1344 as a bearing is provided on the outer peripheral portion of the central rotation shaft 1334 and the inner peripheral portion of the rear end partition 1307. The front end of OILES metal 1344 is flange 1
It is pressed by 345 and receives the thrust of the rear end partition 1307. A relatively large rear chamber 134 is provided between the second partition 1305, the outer tube 1306, and the rear partition 1307.
9 are formed. In the rear chamber 1349,
The muddy water bypass device 1401 in the excavator (see FIG. 79)
It is provided below the central rotation shaft 1334. A packing 1343 is fitted on the inner peripheral surface of the rear end of the rear partition 1307. The space between the outer tube 1306 and the rear end partition 1307 is sealed by an O-ring 1346.

The center rotation shaft 1312 and the center rotation shaft 133
4, a mud feed system 1350 and a mud discharge system 1370
(See FIG. 75) are formed side by side. Mud feed system 1
The 350 and the sludge system 1370 are a pair of left and right parallel to each other, formed continuously in the axial direction from the fixing plate 1303 to the rear end partition 1307, and have the same structure. Therefore, only the mud feeding system 1350 will be described, and the mud discharging system 1370 will be described.
The description of 50 is applied mutatis mutandis, and the description is omitted. This mud feeding system 1350 is for sending muddy water from right to left in FIG. 75 to the front chamber 1330. The front end of the mud feeding pipe 1351 is sealed with a packing 1352. Also, continuously with the mud pipe 1351, the mud pipe 13
53 is connected (exhaust pipe 1363 (see FIG. 92)).
The same). Mud pipe 1353 is muddy water bypass block 14
03 is sealed at the front end of the package 03 with a packing 1356. Mud feed pipe 1354 bent at the rear end of mud water bypass block 1403 (mud drain pipe 1355 (see FIG. 92)
The same is applied), sealed by packing 1357, and the rear end of the mud pipe 1354 is connected to the rear partition 1307. The reason why the sludge pipe 1354 and the sludge pipe 1355 are bent and the flow path of the sludge pipe is deflected downward is that the center rotating shaft 1334 is formed inside the small diameter boring machine body 1013.
This is because the muddy water bypass device 1401 in the excavator must be arranged avoiding the above. Mud feed pipes 1003,
A mud pipe 1004 (see FIG. 55) can be inserted. The sludge discharging system 1370 is
The muddy water supplied from 50 and the earth and sand excavated by the cutter 1331 are discharged, and the muddy water flows from left to right in FIG. 75. It should be noted that a check valve (not shown) is provided, and a high-concentration liquid material with a high content of plugging material is supplied from a slipping material discharge port to thereby form a propulsion pipe 1505.
This is to stabilize the face by forming a mud film on the ground on the outer periphery of. An example of the size of the excavator body 1013 is a length of 902 mm and a diameter of 242 mm.

The mud pressurizing small-diameter pipe propulsion device shown in FIG.
Chamber 1402 communicating with 50 and sludge system 1370
Muddy water bypass block 1403 provided with
And the excavator body 1013 are in a parallel position parallel to the axial direction (the direction of the mud feeding and discharging), so that the mud feeding system 1350 and the mud discharging system 1370 can be separated and the muddy water can be recirculated, and is orthogonal to the axial direction. A plate-like member standing upright inside the chamber 1402 so that the muddy water can be bypassed from the mud feeding system 1350 to the mud discharging system 1370 alternately by 90 degrees at the orthogonal position or the parallel position by being at the orthogonal position. And a rotating shaft fixedly penetrating through the center of the valve body 1405 in the direction perpendicular to the axial direction of the muddy water bypass block 1403 and the muddy water bypass block 1403. 1406 and the rotating shaft 14
06 and a lever 1407 fixed to the
7 and a hydraulic cylinder 1408 for rotating this in a range of 90 degrees, and restricting the rotational movement of a lever 1407,
Stopper 1409 for realizing accurate rotation of valve element 1405
It is composed of Muddy water bypass block 1403
Has two holes at its rear end (inlet mud pipe outlet 141
4, outlet mud pipe inlet 1415) and two holes at its front end (outlet mud pipe inlet 1416, inlet mud pipe inlet 1).
417) are provided, which are in communication with the chamber 1402. The valve element 1405 rotates in the chamber 1402 to switch between a passing state and a bypass state. When viewed in plan along the axial direction, at the parallel position (passing state), the valve body 1405
In the orthogonal position (bypass state), the valve body 1405 moves the chamber 1402 forward and backward by two compartments.
It can be divided into two chambers. Therefore, the muddy water bypass device 140 in the excavator can be easily executed by one valve element 1405.
1 is simplified and downsizing is realized.

This muddy water bypass block 1403 sends muddy water and discharges muddy water and sediment
It has a function as a gate capable of alternately switching between a pass state and a bypass state by blocking the pass state (hereinafter referred to as a bypass state). The above-mentioned passing state is necessary for supplying muddy water to the cutting edge surface accompanying the propulsion of the propulsion pipe 1505 and discharging muddy water and earth and sand from the cutting edge surface.
It is necessary to prevent blockage of the pipeline, collapse of the ground, and the like at the time of additional connection such as 5. In addition, the above-mentioned mud pipe 1353,
The end of the mud pipe 1354 can be inserted into the inlet mud pipe inlet 1414 and the outlet mud pipe inlet 1416, respectively. Each can be inserted into a mud pipe insertion port 1417.
All of the inlet mud pipe inlets 1414 to the inlet mud pipe inlets 1417 communicate with the chamber 1402, respectively.

As shown in FIGS. 75 and 79, the upper portions of the pipes inserted into the inlet mud pipe inlet 1414 and the outlet mud pipe inlet 1416 are pressure transmitters 1418 and 1419, respectively.
(See FIG. 79), and the light electric wires 1418a and 1419a (see FIG. 75) extending therefrom are inserted into the through holes 10 (see FIG. 75).
A current indicating the pressure of the mud is transmitted to the outside through 81, 1082 and the like. Pressure transmitter 141
8, 1419 (see FIG. 79), when the muddy water bypass device 1401 in the excavator is in the muddy water passing state, by controlling the driving force of the main pushing device 1508 (see FIG. 99), the excavation is performed. Controlling the propulsion speed of the machine body 1013 or the muddy water bypass device 1 in the excavator
When the muddy water bypass device 4011 is in the muddy water bypass state, the muddy water bypass device 1401 in the excavator is switched to the passing state when the inner pressure in the back side and the front pressure (cutting blade pressure) of the muddy water bypass block 1403 are balanced. This is to avoid the danger of ground collapse and blockage in the pipe due to the impact of shock. That is, the pressure transmitters 1418, 1418
The detected value of 19 provides a measure for measuring the timing of switching of the muddy water bypass block 1403. Lightweight hydraulic hose 1408a, lightweight electric wires 1418a, 14
19a, the first connector 1001 and the second connector 1201
Are not connected for each connection, but are bundled to some extent, and for the ten connections of the second connection body 1201,
The connection work is performed about once, reducing the amount of work.

The operation of the muddy water bypass device 1401 in the excavator will be described. As shown in FIG. 79, in the muddy water passing state, the valve element 1405 is disposed at a parallel position parallel to the axial direction, and the muddy water from the inlet mud pipe insertion port 1414 is supplied to the chamber 1.
It is sent to the outlet mud pipe insertion port 1416 via 402. In addition, muddy water containing earth and sand from the inlet mud pipe inlet 1417 is supplied to the outlet mud pipe outlet 141 via the chamber 1402.
5 is sent.

On the other hand, in the bypass state, the hydraulic cylinder 1408 is driven to advance the piston rod 1420 and the extension rod 1421, and
Rotate degrees. Then, the valve element 1405 is at a position orthogonal to the axial direction, and mud from the inlet mud pipe insertion port 1414 is sent to the chamber 1402. Entrance 14
15.

Thus, the muddy water bypass device 140 in the excavator
The reason why the muddy water passing state and the bypass state are alternately switched according to 1 is that the sediment pressure is received during the connection work of the propulsion pipe 1505 or the like to avoid the collapse of the sediment and to block the sediment in the mud pipe. In order to avoid this. That is, the muddy water is passed through the valve body 1405 at a position parallel to the axial direction, and the propulsion pipe 1505 is propelled. After one propulsion, the muddy water is bypassed by setting the valve body 1405 at a position perpendicular to the axial direction. To make the muddy water short (short-circuit), drain the clogged earth and sand, and empty the pipe. After that, the propulsion pipe 1505, the first
The connection body 1001 and the second connection body 1201 are disconnected and connected. When the connection work is completed and preparation for propulsion is completed, the pipe pressure at the rear of the muddy water bypass block 1403 (the value of the pressure transmitter 1419) and the muddy water bypass block 1
Pressure on the front side of 403 (cutting blade pressure: pressure transmitter 14
(Value of 18), the gate is opened, so that the impact of the mud feeding can be reduced, and the risk of land collapse and blockage in the pipe can be avoided. The closing of the gate (making the valve element 1405 orthogonal to the axial direction of the mower main body 1013) is performed for each connection operation. The details will be described in the operation.

The excavator main body 1013 shown in FIGS. 75 to 98 is slightly modified from the excavator main body 4 shown in FIG. 36, and the following describes the changes and supplementary items. As shown in FIGS. 80 and 81, the cutter unit 1300
Is a flange 1710 which is detachably fixed to the center rotating shaft 1312 by bolts 1705,
And three reinforcing ribs 1720 which are provided around the periphery to prevent clogging by stirring the surrounding earth and sand flow, and a bolt 1 in front of the flange 1710.
Cone 1 with a conical surface detachably fixed at 725
730 and three inflow holes 17 fixed in a detachable manner on the front surface of the cone 1730 with bolts 1735 and provided in the circumferential direction.
And a plurality of (six) bits 1750 of cemented carbide provided on the face plate 1740
And three stirring ribs 1770 connecting the cone 1730 and the face plate 1740. Pilot pipe fitting 13 consisting of a rotary joint for mounting pilot pipe 1502 on the front side of cone 1730
32 is screwed.

As shown in FIGS. 82 (a), (b) and 83,
The face plate 1740 is formed in a round plate shape, and has a cone 17 in the center.
30 and a bolt 173
This is composed of six screw holes 1742 into which 5 is screwed and the above-mentioned inflow hole 1746. The bit 1750 shown in FIG. 84 has tapered surfaces 1751 to 1754 on both left and right sides when viewed from a plane, and has parallel surfaces 175 in front and rear.
6, 1757 are provided, and a concave portion 17 is provided at the center of the upper surface.
58 are formed. When viewed from the front, upper and lower parallel surfaces 1759a and 1759b are formed. Notches 1750a and 1750b are formed in lower regions on both left and right sides.

A stirring rib 177 shown in FIGS. 85 (a) and 85 (b)
0 is formed in a trumpet shape when viewed from the front, and is formed in a rectangular shape when viewed from the side.

The cone 1730 shown in FIGS.
In order to mount the pilot tube mounting portion 1332 and the like, a mounting hole 1731 formed in the center portion and a radially arranged 6
There are provided bolt mounting holes 1732 and reinforcing ribs 1720 radially extending radially outward from the rear peripheral edge.

The flange 171 shown in FIGS. 89 (a) and 89 (b)
0 is a fitting groove 17 for fitting the reinforcing rib 1720.
11 and a screw hole 171 for screwing the bolt 1725
2 and a mounting hole 1713 formed at the center for mounting the center rotation shaft 1312 and the cone 1730. Blade member 130 shown in FIGS. 90 and 91
2 has the same structure as that of the first example, but has an inner tapered surface 1.
Overlay 1761 is welded to 760.

As shown in FIGS. 92 to 98, the pressure transmitter pedestal 1418c (see FIG. 93) is
The connection pipe 1424 (see FIG. 94) is not provided with a pressure transmitter pedestal. Rear partition 1
An elbow portion 1308 in which a mud hole and a mud hole are cut is welded to a lower portion in front of 307.

FIG. 9 shows changes in the attachment 1566 and the like.
This will be described with reference to FIGS. The attachment 1566 is connected to the machine body 1013, the first connecting body 1013.
01, a structure that can be detachably connected to the rear end of the second connector 1201. Fig. 99
Shows an example of connection with the second connector 1201. Since the structure is substantially the same as that of the attachment 366 of the first example, different points and supplementary items will be mainly described. Sludge pipe 15
67 and the sludge pipe 1568 each extend upward. The second connecting body 1201 is connected to the connecting hook 1
At 110, it is detachably connected. Further, the distance between the holding member 1604 and the main body mounting bracket 1606 is further reduced.

(Effects of the Second Example) The effects of the muddy water bypass device in the excavator of the second example are substantially the same as those of the muddy water bypass device of the first example, and the effects of the first example are applied mutatis mutandis.
However, the following effects are specific to the second example. (G) The connection hook 1110 allows the first connector 100
There is an effect that connection work of the first and second connection bodies 1201 and the like is further facilitated. (H) By the reinforcing rib 1720 of the cutter unit 1300,
The face plate 1740 is reinforced and the cutter 1300
The internal atmosphere can be forcibly stirred to effectively prevent clogging of earth and sand. (I) The center rotation axis 1002 of the first connector 1001 and the second
The center rotating shaft 1202 of the connecting body 1201 is free, and the firm fitting as in the first example is greatly eased. (J) The front connecting members 1008, 1208 and the rear connecting members 1009, 1209 are thinned, and the holding member 101
For example, the first connecting body 100 is made smaller,
1. The overall weight of the second connection body 1201 was further reduced from approximately 60 kg to approximately 30 to 35 kg. (K) First joint pipe 1031, second joint pipe 1
Since the O-ring 1035 is fitted to the outside of 032, the manufacturing cost is reduced by switching from inner processing to outer processing, the connection work is simplified, and the fitting of the O-ring 1035 is made visible so that reliability is improved. Was improved. (L) In the excavator main body 1013, when the flow path is changed by bending the exhaust pipe 1034, it is easy to obtain the accuracy of the center-to-center alignment. That is, welding was performed after a hole was formed. However, after welding, a tunnel was cut from both sides so as to penetrate the hole.

(Third Example Muddy Water Bypass Device in Excavator) The muddy water bypass device in excavator of the third example has a slightly modified configuration and a modified surrounding configuration. First, the connection body for muddy water pressure propulsion will be described with reference to FIGS. This muddy water pressure propulsion connection body 300
1, 3201 is generally set to the same length as the second example, but the spline portion of the second example has a larger diameter, and accordingly, the peripheral portion is changed in design or connected. Creation of a work room to improve workability, and change to connection with bolts and nuts instead of connection hooks,
The configuration is partially changed, such as replacing the positions of the mud feeding system 3350 and the mud discharging system 3370 (reversing the arrangement). Therefore, only the configuration common to the second example will be illustrated, and different configurations will be mainly described. Note that the corresponding part numbers are in the 3000s (approximately 2000s). Further, as to the method of cutting the cross section, the cutting method is appropriately changed for each location in order to show all the components, and the hatching of the cross-sectional view is unnecessarily complicated in this example, so that it is omitted as appropriate.

First, the first connector 3001 will be described with reference to FIGS. This first connector 3001
Is an inner casing housed inside the rear part of the excavator body 3013, and its length is greatly reduced to be compact.
The example is different from the second example. The first connector 3001 is
A front connection member 3008 and a rear connection member 3009 are provided at the front end and the rear end, respectively.
34 is provided with a through hole 3083 for receiving the female spline portion 3342, and a cylindrical mud feeding pipe 3203 and a mud discharging pipe 3204 are inserted obliquely below the left and right thereof so that they can be axially fixed. 3085 are provided. In the center on the left and right, penetrating holes 3081 and 3082 with open side surfaces through which bolts 3090 penetrate, lightweight hydraulic hose 3408a, lightweight electric wires 3418a and 3419a.
Oval-shaped through hole 30 provided at the upper part for accommodating
86 are provided. Further, a plurality of bolts 3380 are screwed into the bolt mounting holes 3088a to 3088e to enable connection with a rear end partition 3307 of the excavator body 3013 to be described later. Through hole 308 of rear connection member 3009
13082 has a bolt receiving groove 3120 in its lower part.
(See FIG. 109), and square keys 3122 are formed on both sides thereof to prevent the nut 3123 from idling when the bolt 3090 is tightened. The bolts 3090 are screwed into screw holes 3309 (see FIG. 118).

As shown in FIG. 105, the first joint pipe 3
031 is a round hole 3307d for feeding mud and a round hole 33 for discharging mud.
07e, a mud pipe 3003, and a mud pipe 3004, which are connected to each other. In addition, the second joint pipe 3032 includes a mud feed through hole 3307d, a mud discharge through round hole 3
307e connects the mud feeding pipe 3203 and the mud discharging pipe 3204 (see FIG. 109) of the second connection body 3201.
The first joint pipe 3031 and the second joint pipe 3032 are a first joint pipe 1031 (see FIG. 60) and a second joint pipe 1231 (FIG. 71) of the second connector 1201 of the second example. ), And the description will be applied mutatis mutandis.

Since the first connector 3001 is short, a tubular driving force transmission shaft 3005 is provided on the outer periphery. If necessary, a thrust transmission shaft 3006 may be provided at the center so as to surround the spline connection (FIG. 107).
reference). The second connecting body 3201 and the propulsion pipe 3505 have substantially the same length, and the propulsion pipe 3505 is connected to the first connecting body 3505.
001 so that the propulsion pipe 35
05 from the rear end of the second connector 3201 to the rear connector 320
9 is exposed, and the connection workability is improved.

Next, the second connector 3201 is shown in FIGS.
This will be described with reference to FIG. Generally speaking, the spline portion of the central rotary shaft 3201 has a large diameter (particularly, a female spline portion).
4. Since the distance between the propulsion transmission shafts 3206 is reduced and it is difficult to hold them, the front connection member 3
The lengths of the center connection tube 3221 and the rear connection member 3209 are increased in the same manner in the axial direction, so that the center connection tube 3221 is held at a narrow portion. A locate pin 3228 is provided on the front end of the male spline portion 3222 to facilitate the fitting. In addition, in order to improve workability, side openings 32 as work windows are provided.
81, 3282, lightweight hydraulic hose 3408a, and upper openings 3286 for accommodating lightweight electric wires 3418a, 3419a.

That is, as shown in FIGS. 110 and 111, the second connecting body 3201 has a front end and a rear end, respectively.
A front connection member 3208 and a rear connection member 3209 having a thickness (width) in the axial direction are provided.
A cylindrical thrust pipe 3203 and a sludge pipe 3204 are provided diagonally below the left and right diagonally below the front connection member 3.
208 and the rear connection member 3209 so as to be fixed in the axial direction. Also, a small piece of an anti-friction sheet (not shown, equivalent to a bush slide) is stuck to the lower surface peripheral portion of the front connection member 3208 with a double-sided adhesive tape so as not to be rubbed when being pulled out. Further, FIG.
As shown in FIG. 11, a plate-like holding member 3210 is provided at the rear end of the front connection member 3208, and the first working chamber 32
Similarly, a plate-like holding member 3211 is provided at the front end of the rear connection member 3209, and a second working chamber 3213 is formed inside. These first working rooms 3
Each of the 212 and the second working chamber 3213 has an open side surface and communicates with the outside so that a tool or the like can be inserted therein.

The male spline portion 3222 and the male spline portion 3 of the center rotation shaft 3202 shown in FIGS.
225 has a larger diameter than that of the second example, and is housed inside the propulsion transmission shaft 3206 and is generally free, but can be locked by the stop plate 3215. That is, the center rotation shaft 3202 is pulled backward in the axial direction, but is restricted from moving forward in the axial direction. This stop plate 3215 is, as shown in FIG.
A through hole 3216 through which the center rotation shaft 3202 passes is provided at the center, and a bolt 3
At 217, it is detachably fixed. As a result, the trouble at the time of pulling out can be eliminated, and the accumulation of errors in the fitting of the splines does not occur. Also, as shown in FIG. 109, the spline tip of the male spline portion 3222 is tapered to facilitate fitting, and the male spline portion 3222 is formed.
Locating pin 3228 is formed on the front side of. A second joint pipe 3232 is used to connect the sludge pipe 3203 and the sludge pipe 3204, and this is the second joint pipe 3232 of the second example.
The structure is similar to that of the joint pipe 1231 (see FIG. 71), and the description will be applied mutatis mutandis. The first joint pipe 3031 is not used. The number of propulsion force transmission shafts 3206 in the center is one, which is one less than in the second example.

FIG. 109 and FIG.
0 will be described. Side openings 3281 and 3282 with side surfaces opened on both sides of the upper part of the front connection member 3208.
(See FIG. 112), a through-hole 3283 in the center, a through-hole 3284 on the lower left, and a through-hole 328 on the lower right.
5. An upper opening 3286 is formed in the upper center.
The side openings 3281 and 3282 are provided for performing connection work. The center rotation axis 3202 is
The tubular propulsion force transmission shaft 3206 can be housed inside. The thrust transmission shaft 3206 is formed by a through-hole 3283 of the front connection member 3208 and a rear connection member 3209.
And can be fixed by being inserted into the through-hole 3283.

The elements of the rear connection member 3209 (see FIG. 110) having the same structure as the front connection member 3208 are described below.
Since the description of the front connection member 3208 is applied mutatis mutandis, a number obtained by adding number 10 to the corresponding part number is shown. When the center rotating tube 3221 is removed, the front connection member 3208 is viewed from the side and the driving force transmission shaft 3206
However, when viewed from the side, the driving force transmission shaft 3206 is not visible in the second working chamber 3213 of the rear connection member, and the second working chamber 3213 communicates with the other side in space. As shown in FIG.
The connection between the second connection bodies 3201 can be detachably connected by bolts 3290 and nuts 3323. The drain hole 3 is formed on the bottom surface of the second connection body 3201.
218 are provided. The hatched portions in FIGS. 110 and 111 are welded portions.

Further, the rear ends of the first connection body 3001 and the second connection body 3201 are attached to an original pressing device 3508 (see FIG. 123) by an attachment 3566 (see FIGS. 123 to 1).
27) can be connected detachably. Further, the propulsion pipe 3505 is connected to the main pushing device 350 via a main body mounting bracket 3606 (see FIG. 125).
8 can be detachably connected.

The procedure for assembling the first connector 3001 is shown in FIG.
This will be described with reference to FIG. In the first joint pipe 3031, a mud feed through hole 3307d, a mud discharge through hole 3
307e, insert into the mud feed pipe 3003 and the mud discharge pipe 3004 and weld. In the second joint pipe 3032, the mud feed through round hole 3307d, the mud discharge through round hole 3307e, the second connector 32
01 and the mud pipe 3204 are connected. The first connector 3001 thus assembled is connected to the bolt 309
0 is passed through the through holes 3081 and 3082 and screwed into a screw hole (not shown) of the rear partition 3307. In addition, the plurality of bolts 3380 are attached to the bolt mounting holes 3088a to 3088e.
Into the excavator body 3013 at the rear end partition 3307
Connect with Mud pipe 320 in through holes 3084 and 3085
3 and the drain pipe 3204 are inserted and welded. Also, the male spline portion 3222 of the second connector 3201 is inserted into the female spline portion 3342 of the center rotation shaft 3334, and the second connector 3201 is connected. Tighten 3090. The procedure for assembling the second connector 3201 will be described with reference to FIGS. Mud pipe 32
03 and the exhaust pipe 3204 are inserted into the front connection member 3208 and the rear connection member 3209 and welded. Similarly, the driving force transmission shaft 3206 is welded. A small piece of an anti-friction sheet (not shown, equivalent to a bush slide) is adhered to the lower surface peripheral portions of the front connection member 3208 and the rear connection member 3209 with a double-sided adhesive tape. It should be noted that the sludge pipe 3203 and the sludge pipe 3204 do not necessarily need to be welded, and may have play.

The first connector 3001 described above is similar to the first connector 3001 shown in FIG.
As shown in FIG. 05, it is installed from the beginning at the rear end of the excavator body 3013.
A second connector 3201 can be connected to the rear end of the second connector 001.
The connection body 3201 can be connected one after another.
In addition, the connection between the first connection body 3001 and the second connection body 3201 or the connection between the second connection bodies 3201 is detachably performed using bolts and nuts. Therefore, when the connection is made with the connecting hooks of the second example, it is necessary to pull or pull it out during difficult construction, and the clearance for dropping is loosened as a whole, but this was solved in the third example. Things.

The moating machine main body 3013 shown in FIGS. 113 to 122 has substantially the same structure as the moating machine main body 1013 of the second example, so the numbers are 3000s and the description is applied mutatis mutandis. The configuration around the different configuration of the muddy water bypass device in the excavator will also be described.
First, as shown in FIG. 116, the connection surface between the cone 3730 and the flange 3710, or the connection surface between the flange 3710 and the front end of the central rotation shaft 3312, is provided with a tapered surface whose diameter decreases in the axial direction. It is. As a result, the face plate 3740 is vibrated and transmitted in the gravel layer,
Although the direction becomes loose as it is, if the taper is used, zero clearance can be obtained, and the occurrence of loosening is suppressed as much as possible. In addition, it becomes strong against pushing. Easy to put on and take off. FIG.
5, a lubricant injection hose 3410, a lightweight hydraulic hose 3408a, and the like are disposed through the through hole 3086 as shown in FIG. 117 and the like. Mud system 3350 and mud system 337
The position of 0 is opposite to that of the above-described example (see FIG. 122). Further, as shown in FIG. 122, the pressure transmitters 3418 and 3419 are connected to the muddy water bypass device 3 in the moating machine.
It is arranged at the entrance and the exit of the drainage path 401 respectively. That is, in the above-described normal state, the pressure on the cutting edge side can be measured by the pressure transmitter 3418, and in the bypass state, the bypass pressure can be measured by the pressure transmitter 3419. Further, the arrangement of the hydraulic cylinder 3408 of the muddy water bypass device 3401 in the moating machine is changed. This makes the movement of the hydraulic cylinder 3408 smooth. That is, as shown in FIG. 122, the position indicated by the solid line where the offset (about 15 degrees diagonally) is set indicates the bypass state (the valve element is closed perpendicular to the flow), and the initial position indicated by the dotted line is the normal state. (The valve is parallel to the flow and open). Generally, the pushing force of the hydraulic cylinder 3408 is strong, and the pulling-back force is weak. Therefore, the hydraulic cylinder 3408 is optimally designed in consideration of the direction of the flow of the mud. Then, a reed switch 3430 is attached to the hydraulic cylinder 3408, and green and red lamps are provided on the central operation panel 310 (see FIG. 27) to make it blink so that opening and closing of the hydraulic cylinder 3408 can be confirmed. Thus, even if the pressure transmitter 3419 fails, the reed switch 3430 can be used instead. FIG.
The second partition wall 3305 shown in FIG. 9 includes a mud feed through hole 3305d and a mud discharge through hole 33 which are formed in the lower part and are arranged side by side.
05e, lightweight hydraulic hose 3408a, lightweight electric wire 341
8a, 3419a, a through hole 3305f through which a lubrication material supply pipe (not shown) is passed, a hydraulic cylinder arrangement hole 3305j, and a pull-out bolt 3305m. Note that 33
05n is a connecting bolt. 3319 in FIG. 118, 3
380 is also a bolt.

FIG. 1 shows changes in the attachment 3566 and the like.
This will be described with reference to FIGS. The attachment 3566 includes a first connector 3001, a second connector 3
It can be detachably connected to the rear end of the motor 201 and has a structure capable of propelling them. FIG.
23 shows a connection example with the second connection body 3201. The attachment 3566 includes a male spline portion 3601 disposed at the center, and a central through-hole 360 disposed at the front of the male spline portion 3601 and through which the male spline portion 3601 can pass.
2 and a sludge pipe 3567 and a sludge pipe 3568
Plate-shaped first holding member 3604 provided with a feed / drain pipe connecting member 3603 capable of connecting each of them, and a male spline portion 360
1 and a plate-shaped main body mounting bracket 3606 having a central through-hole 3605 through which it can pass, and a plug-in shaft 3620 which holds the propulsion pipe 3505 and has external threads formed on the outer periphery. Rear end is first
A plate-shaped horseshoe-shaped second holding member 3609 having a screw member 3630 for position adjustment, which is detachable by an insertion structure to be inserted into the hole 3660 of the holding member 3604, and a first holding member It is composed of three round shafts 3607 connecting the main body mounting bracket 3606 with the main body mounting bracket 3604 and having external threads formed on the outer periphery. As a result, the rotational power from the main pushing device 3508 is transmitted to the center rotating shaft 3202 via the male spline portion 3601, and the propulsive force is also transmitted to the excavator main body 3013 by the propulsive force transmitting shaft 3206. I have.
In addition, it is possible to prevent the propulsion pipe 3505 from slipping out or shifting.
First holding member 3604, mud feeding pipe 3567, and mud discharging pipe 356
8 is connected by welding with a connection plate 3640. Oval holes 3650 (see FIG. 124) are formed at three places in the first holding member 3604, and the position can be adjusted in the circumferential direction.

FIG. 128 shows a male spline portion 3601 which is attached to the original pushing device 3508 and serves as a drive shaft. The male spline portion 3601 is provided with a cylindrical casing 3810.
A front spring guide 3820 that can be moved back and forth, housed in the casing 3810, and a bolt 383.
Cover 38 fixed to the rear end of the casing 3810
35, a rear spring guide 3840 arranged at the rear of the casing 3810, and a coil spring 3850 fitted. Also, free screw 3
870 is the center hole 38 of the rear spring guide 3840
60, and a bearing nut 3880 is fixed to the rear part. A center shaft 3885 is fixed to the front end of the free screw 3870. This center axis 388
The head 3900 is fixed to the front end of the head 5 with a front spring guide 3820 and a urethane sheet 3890 interposed therebetween. This head 3900 is provided with a locate pin 3910 at the front end, followed by a male spline 392.
0 is provided. A guide plate 3930 into which the head 3900 is inserted and slidable is provided with a bolt 39.
At 40, it is fixed to the casing 3810.

The aforementioned male spline 3920 is adapted to be fitted to the female spline 3225 of the second connector 3201 (see FIG. 123). In this case, there is a case where the fitting can be performed smoothly.
By the action of 0, the head 3900 rotates so that the head 3900 can be fitted smoothly.

(Effects of the Third Example) The functions and effects of the muddy water pressure propulsion connection body of the third example are almost the same as those of the muddy water pressure propulsion connection bodies of the first and second examples. The description of is omitted. However, the following effects are obtained in addition to the effects of the first and second examples. (M) Cone 3730 and flange 3 of cutter unit 3300
710, or cone 3730 and face plate 37
A tapered surface whose diameter is reduced toward the head in the axial direction is adopted as a connection surface with the connection 40 to prevent loosening. (N) Since the stopper plate 3215 is detachably provided, the clearance of the center rotation shaft 3202 and the accumulated error are 50 mm.
And replacement becomes easy. (O) Since the diameter of the spline portion of the center rotary tube 3221 is large, the strength is improved and the connection portion can be prevented from being damaged. (P) Bolt 3090, nut 3123, key 3122
Since there is a (rotation stop), the mounting work of the bolt and nut is easier. (Q) Lightweight electric wires 3418a and 3418 are provided in upper opening 3286.
419a, the lightweight hydraulic hose 3408a, etc. are simply dropped from above, so that their wiring work becomes extremely simple. (R) Since the hydraulic cylinder 3408 is provided with an offset, the opening and closing resistance of the valve body is reduced. (S) The reed switch 3430 is connected to the hydraulic cylinder 3408.
Is provided, the operation of the hydraulic cylinder 3408 can be monitored, and even if the pressure transmitters 3418, 3419 fail, the open / closed state can be grasped. (T) Since the first connection body 3001 is pre-installed in the moat main body 3013, the connection work of the connection body is simplified. In addition, the propulsion pipe 3505 can be inserted into the rear portion of the moating machine main body 3013 by abutting it, so that the sealing performance can be secured. The connection work of the rear part of the second connection body 3201 is facilitated (see FIG. 105). (U) Since the front connection member 3208 and the rear connection member 3209 enclose the mud feed pipe 3203 and the mud discharge pipe 3204, they can be prevented from being damaged during transportation.

In the third example, the applicable pipe type is
PVC pipes, steel pipes, ceramic pipes, fume pipes, plastic pipes, etc. The applicable pipe diameter is approximately 150 to 300 mm, the effective length is 800 to 1,000 mm, and the soil is a stagnant sand layer, a gravel layer, a clay layer, a silt layer, and the like. N value is N5 to N20, water pressure is P = 0.6 to 0.7 Kg / cm ² , and water permeability coefficient K = 10 ^−
2 / sec or more, maximum gravel diameter less than 20% at 30mm, gravel rate less than 20%, maximum propulsion distance 60m-100m, thrust 3
0 ton, a rotational force of 300 kg · m, and a moat body (tip conductor) weight of 200 kg (φ200 mm). As an example of construction, the diameter of the reaching shaft 385 (see FIG. 53) is φ90.
0 mm, the diameter of the starting shaft 304 (see FIG. 53) is φ15
00 mm and the like.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and may be implemented in various technical forms without departing from the technical spirit of the present invention. Of course, changes can be made.

[0122]

According to the first to seventh aspects of the present invention, it is possible to simplify the structure of the bypass device, start from a small shaft, and simplify the starting operation.

[Brief description of the drawings]

FIG. 1 is a front view of a muddy water bypass block of a shaft shaft bypass device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a muddy water bypass block.

FIG. 3 is a right side view of the muddy water bypass block.

FIG. 4 is a cross-sectional view of the muddy water bypass block cut along the line AA in FIG. 2;

5A is a front view of an upper main body, and FIG.
It is sectional drawing which cut | disconnects and shows an upper main body along the -B line.

FIG. 6 is a plan view of the upper main body.

FIG. 7 is a right side view of the upper main body.

8A is a front view of a lower main body, and FIG.
It is sectional drawing which cut | disconnects and shows a lower main body along the -C line.

FIG. 9 is a plan view of the lower main body.

10A is a right side view of the lower body, and FIG.
It is sectional drawing which cuts and shows a lower main body along the DD line of FIG.

11A is a front view of a valve body, FIG. 11B is a plan view of the same,
(C) is a right side view of the same.

12A is a front view of a rotating shaft, FIG. 12B is a plan view of the same, FIG. 12C is a bottom view of the same, and FIG. 12D is EE in FIG. 12A.
It is sectional drawing which cut | disconnects and shows a rotating shaft along a line.

13A is a front view of the lever, FIG. 13B is a rear view thereof, FIG. 13C is a plan view thereof, and FIG. 13D is a right side view thereof.

14A is a front view of the stopper, FIG. 14B is a plan view thereof, and FIG. 14C is a right side view thereof.

15A is a front view of the bearing plate, FIG. 15B is a plan view of the same, and FIG. 15C is a cross-sectional view of the bearing plate cut along the line FF in FIG. 15B.

FIG. 16 is a front view of a muddy water bypass block (passing state) of the shaft bypass device of the second embodiment.

FIG. 17 is a plan view of a muddy water bypass block (passing state) of the vertical shaft bypass device.

FIG. 18 is a plan view of the muddy water bypass block (bypass state).

FIG. 19 is a right side view of a muddy water bypass block (passing state) of the vertical shaft bypass device.

20A is a front view of the main body, and FIG.
19 is a cross-sectional front view showing the main body cut along line I, and FIG. 19C is a cross-sectional front view showing the main body cut along line JJ in FIG. 18.

21 is a cross-sectional plan view showing the main body cut along the line KK in FIG. 16;

22 (a) is a front view of the lid, FIG. 22 (b) is a plan view thereof,
(C) is a sectional front view showing the lid cut along the line LL in FIG. 22 (b).

23A is a front view of a plastic valve, FIG. 23B is a plan view of the same, FIG. 23C is a cross-sectional plan view of the plastic valve taken along line MM in FIG. d) is a right side view of the plastic valve.

24A is a front view of a metal valve, FIG. 24B is a plan view of the same, FIG. 24C is a cross-sectional plan view of the metal valve taken along line NN of FIG. d) is a right side view of the metal valve.

FIG. 25 is a plan view showing a shaft bypass device (muddy water bypass state).

FIG. 26 is a plan view showing a shaft bypass device (muddy water passing state).

FIG. 27 is an overall explanatory diagram of a muddy water pressurized small-diameter pipe propulsion device to which a shaft bypass device arranged in a starting shaft is applied.

FIG. 28 is a right side view of the shaft bypass device of the third embodiment.

FIG. 29 is a vertical sectional view of the center.

FIG. 30 is a plan view showing a connection state of the same shaft bypass device.

FIG. 31 is an overall explanatory view of a muddy water pressurized small-diameter pipe propulsion device to which a shaft bypass device arranged in a starting shaft is applied.

FIG. 32: Muddy water bypass device in the excavator (state of passing muddy water)
FIG.

FIG. 33 is a plan view showing the muddy water bypass device in the excavator (muddy water bypass state).

34A is a partially broken plan view of the excavator body in a passing state, and FIG. 34B is a partially broken plan view of the excavator body in a bypass state.

35 is a cross-sectional view of the excavator main body cut along the line GG of FIG. 34.

FIG. 36 is a partially broken front view of the body of the excavator.

FIG. 37 is a partially broken front view showing the vicinity of a muddy water bypass block of the excavator body.

FIG. 38 is a front view showing a connection body.

39 (a) is a left side view of the connection body, and FIG. 39 (b) is a front view of the front connection plate.

40 is a cross-sectional front view showing the excavator main body cut along the line HH in FIG. 39 (a).

FIG. 41 is an enlarged plan view of a small-diameter pipe propulsion device for pressurizing muddy water in a starting shaft.

FIG. 42 is a partial cross-sectional front view of the entire configuration including a muddy pressurized small-diameter pipe propulsion device to which the shaft bypass device of the present embodiment is applied.

FIG. 43 is a plan view of the same.

FIG. 44 is a process diagram of the same muddy water pressurized small-diameter pipe propulsion method.

FIG. 45 is a standard process chart in the muddy water pressurized small-diameter pipe propulsion method.

FIG. 46 is a partial cross-sectional front view of the manhole frame with the connection casing attached.

FIG. 47 is a front view of the construction state in which the swivel press of the manhole body is performed by the swivel press machine.

FIG. 48 is a partial cross-sectional front view showing an installation process of a main pushing device.

FIG. 49 is a partial cross-sectional front view showing a pilot pipe propulsion step.

FIG. 50 is a partial cross-sectional front view showing a pilot pipe propulsion step.

FIG. 51 is a partial cross-sectional front view showing a propulsion tube propulsion process.

FIG. 52 is a partial cross-sectional front view showing a propulsion tube propulsion process.

FIG. 53 is a partial cross-sectional front view showing a recovery step of a connected body and the like.

FIG. 54 is a partial cross-sectional perspective view of the manhole in a state after the connection casing has been removed.

FIG. 55 (a) is a left side view showing a first connection body of the second example, and FIG. 55 (b) is a front view of a front connection member of the first connection body.

FIG. 56 is a cross-sectional view of the first connection body taken along the line RR in FIG. 55;

FIG. 57 is a right side view of the first connection body.

FIG. 58 is a plan view showing a connection structure between a front connection member and a holding member.

59A is a left side view of the holding member, FIG. 59B is a front view of the holding member, and FIG. 59C is a central longitudinal sectional view of the holding member.

60A is a central longitudinal sectional view of a first joint pipe (with an O-ring fitted therein), and FIG. 60B is a right side view of the first joint pipe.

61A is a left side view of the center rotation axis, FIG. 61B is a right side view of the center rotation axis, and FIG. 61C is a central longitudinal sectional view of the center rotation axis.

FIG. 62 is a front view showing the first connection body (with a holding member and a center rotating tube removed).

FIG. 63 is a left side view of the first connector (with the center rotation axis removed).

FIG. 64 is a right side view of the first connector (with the center rotation axis removed).

FIG. 65 is a perspective view of the second connector (with the central rotation axis removed).

FIG. 66 is a left side view of the second connector.

FIG. 67 is a front view showing the second connection body (with a holding member and a center rotation tube removed).

FIG. 68 is a front view in the center longitudinal section of the second connector.

FIG. 69 is a right side view of the second connection body.

FIG. 70 is a plan view near the front connection member.

FIG. 71 (a) is a central vertical sectional view of a second joint pipe (with an O-ring fitted therein), and FIG. 71 (b) is a right side view of the second joint pipe.

72A is a left side view of the center rotation axis, FIG. 72B is a right side view of the center rotation axis, and FIG. 72C is a central longitudinal sectional view of the center rotation axis.

FIG. 73 (a) is a front view of the vicinity of a connection hook, and FIG. 73 (b) is a plan view showing a connection portion of a second connection body.

74A is a plan view of the connecting hook, FIG. 74B is a front view of the connecting hook, FIG. 74C is a right side view of the connecting hook,
(D) is a longitudinal sectional view of the connecting hook.

FIG. 75 is a cross-sectional front view of the excavator body of the second example.

FIG. 76 is a perspective view of the machine body.

FIG. 77: The excavator body (with cones removed)
It is a perspective view of.

FIG. 78: The main body of the excavator (with the cutter part removed)
It is a perspective view of.

FIG. 79 is a cross-sectional plan view of the machine body.

80A is a left side view of the excavator body, and FIG. 80B is a plan view of a front portion of the excavator body.

FIG. 81 is a cross-sectional view of the cutter unit of the second example.

FIG. 82 (a) is a plan view of a face plate, and FIG. 82 (b) is a left side view of the same face plate.

FIG. 83 is a front view of the face plate.

84A is a plan view of a bit, and FIG. 84B is a left side view of the bit.

FIG. 85 is a front view of the stirring rib, and FIG. 85B is a left side view of the stirring rib.

FIG. 86 is a left side view of the cone.

FIG. 87 is a longitudinal sectional view of the cone.

FIG. 88 is a right side view of the cone.

FIG. 89 (a) is a sectional plan view of a flange, and FIG. 89 (b) is a left side view of the flange.

FIG. 90 is a left side view of the blade member.

FIG. 91 is a central longitudinal sectional view of the blade member;

FIG. 92 is an exploded perspective view showing the muddy water bypass device in the excavator of the second example, a rear end partition, and the like.

FIG. 93 (a) is a left side view of a connection pipe and a pressure transmitter pedestal, and FIG. 93 (b) is a front view thereof.

FIG. 94 (a) is a left side view of the connection pipe, and FIG. 94 (b) is a front view thereof.

FIG. 95 is a front view of a rear end partition.

FIG. 96 is a front view showing a state where the connection pipe is inserted into the rear end partition.

FIG. 97 (a) is a plan view of an elbow part, and FIG. 97 (b) is a front view of the elbow part.

FIG. 98 is a left side view showing a moat main body near the elbow section.

FIG. 99 is a front view showing the connection between the attachment of the second example and the second connector.

100A is a left side view showing the connection between the attachment of the second example and the second connection body, and FIG. 100B is a plan view showing the same part.

FIG. 101 is a left side view of the pressing member.

FIG. 102 is a front view of a holding member.

FIG. 103 is a front view of a main body mounting bracket.

FIG. 104 is a left side view of the main body mounting bracket.

FIG. 105 is a cross-sectional front view showing the connection between the first connector and the second connector of the third example.

FIG. 106 is a left side view of the first connection body.

FIG. 107 is a front view of the first connection body.

FIG. 108 is a right side view of the first connection body.

FIG. 109 is a left side view of the second connection body.

FIG. 110 is a front view of the second connection body.

FIG. 111 is a front view showing the internal structure of the second connector.

FIG. 112 is a right side view of the second connection body.

113 is a left side view of the excavator body of the third example (FIG. 115)
As viewed from the direction of arrow II-II).

FIG. 114 shows an excavator main body taken along a line III-I in FIG.
It is sectional drawing cut | disconnected along II line.

115 is a sectional front view of the excavator body. FIG.

FIG. 116 is an enlarged cross-sectional front view of a front portion of the machine body.

FIG. 117 is an enlarged front sectional view of a rear portion of the excavator body.

FIG. 118 shows an excavator main body taken along IV-IV in FIG. 115.
It is sectional drawing cut | disconnected along the line.

FIG. 119 is a cross-sectional view of the excavator body taken along line VV in FIG. 122.

120. FIG. 120 shows the excavator main body as VI-VI.
It is sectional drawing cut | disconnected along the line.

FIG. 121 shows an excavator body of FIG.
It is sectional drawing cut | disconnected along II line.

FIG. 122 is a cross-sectional plan view of the rear half of the machine body.

FIG. 123 is a front view showing a state of connection between the attachment of the third example and a second connection body.

FIG. 124 is a left side view showing a state of connection between the attachment and a second connection body.

FIG. 125 is a plan view of the attachment.

FIG. 126 is a left side view of the second holding member.

FIG. 127 is a plan view of a second pressing member.

FIG. 128 is a cross-sectional front view of the male spline portion.

FIG. 129 is an enlarged view of a small-diameter pipe propulsion device with pressurized mud near a starting shaft in which a conventional shaft bypass device is arranged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical shaft bypass device 2a, 2b chamber 3 Muddy water bypass block 4 Excavator main body 5 Valve 6 Rotating shaft 7 Lever 8 Hydraulic cylinder 8a Lightweight hydraulic hose 9a, 9b Stopper 10 Bearing plate 14 Mud pipe 15 Mud pipe 16 Mud feed Pipe 17 Drainage pipe 18 Pressure transmitter 19 Pressure transmitter 18a Light electric wire 19a Light electric wire 20 Bolts (20a to 20h) 21 Locating pins (21a, 21b) 22 Packing 23 Packing 24 Packing 25 Packing 26 Right side wall 27 Left side wall 26a Fitting Fitting surface 27a Fitting surface 28 Right side wall 29 Left side wall 28a Fitting surface 29a Fitting surface 30 Upper body 31 Shaft hole 32 Mud hole 33 Drain hole 34 Mud hole 35 Mud hole 32a-35a Packing groove 32b-35b Connection port 36 Rear bulkhead 37 Front bulkhead 36a Fitting surface 3 7a Fitting surface 38 Female screw hole (38a to 38c) 38i to 38j Positioning hole 39 Female screw hole (39a to 39h) 40 Lower body 41 Bearing hole 42 Mud feed hole 43 Mud drain hole 44 Mud feed hole 45 Mud drain hole 42a to 45a Packing groove 42a-45b Connection port 46 Partition wall 47 Partition wall 46a Fitting surface 47a Fitting surface 49 Female screw hole (49a-49h) 49i-49j Positioning hole 51 Front plane 52 Rear plane 53 Left curve plane 54 Right curve plane 55 Top plane 56 Lower plane 57 Square shaft hole 80 Piston rod 81 Extension rod 82 Slide part 83 Guide member 85 Fixing plate 86 Nut 87 Round bolt 100 Cutter part

Claims (7)

[Claims] 1. A muddy water bypass block provided with a mud passage and a mud passage in an axial direction, a chamber communicating the mud passage and the mud passage, and a bypass valve rotatable in the chamber. The bypass valve supplies the muddy water from the muddy water treatment device through the muddy passage and supplies it to the excavator main body, and also passes the muddy water containing earth and sand excavated by the excavator main body through the muddy water passage to form the muddy water. A shaft bypass device, which can be discharged to a treatment device or the muddy water can be bypassed to a muddy water treatment device. 2. A muddy water bypass block, a chamber formed in a central portion of the muddy water bypass block, and a mud pipe connected to the muddy water bypass block so as to communicate with the chamber. A mud hole provided with a connection port, a connection through which the muddy water bypass block penetrates the muddy water bypass block in the front-rear direction so as to communicate with the chamber and is arranged in parallel with the mud hole; A mud hole provided with a mouth, so that muddy water can be passed at a parallel position parallel to the axial direction of the muddy water bypass block, and the muddy water can be bypassed at an orthogonal position orthogonal to the axial direction. A valve body disposed in the chamber so as to be rotatable alternately at an orthogonal position or a parallel position; and a valve body rotatably disposed at a central portion of the muddy water bypass block perpendicular to the axial direction. , Pit bypass device, wherein a rotating shaft provided in the valve body, and a pivot portion which can rotate the pivot shaft, further comprising a. 3. A first fitting surface which can be fitted to the valve body at the parallel position of the valve body is provided at a parallel end of the chamber, and at the orthogonal position of the valve body, 3. The shaft bypass device according to claim 1, wherein a second fitting surface capable of fitting with the valve body is provided at an orthogonal end of the chamber. 4. 4. A hydraulic cylinder disposed in the axial direction near the muddy water bypass block, a lever having one end fixed to the rotation shaft, and a lever having one end fixed to the rotation shaft. A conversion mechanism for connecting the piston rod of the hydraulic cylinder to convert the reciprocating motion of the piston rod of the hydraulic cylinder into a rotational motion of the valve body; and a guide holding member for guiding the piston rod while linearly holding the piston rod. The shaft shaft bypass device according to any one of claims 1 to 3, wherein the shaft shaft is an actuator. 5. A shaft shaft bypass device according to claim 1, wherein said muddy water bypass block is formed by connecting halves. 6. The shaft bypass device according to claim 1, wherein the muddy water bypass block is an integral type. 7. A muddy water pump connected to an outlet side of the muddy water bypass block and a muddy water pump provided at an outlet side of the muddy water bypass block are connected to a muddy water treatment apparatus via a muddy water pump. The shaft shaft bypass device according to any one of claims 1 to 6, wherein: