TWI535929B - A shield machine - Google Patents

Description

Channel excavator

The present invention relates to a channel excavator which can enhance the rotational driving force of a cutter head without using a large-sized, large-capacity electric motor and can free the position of the shaft to arrange the machines in a reasonable manner.

Patent Document 1 discloses a passage excavator for embedding a small-diameter pipe such as a gas pipe or a sewer pipe in an underground. In the "channel excavator and tunnel excavation method" of the patent document 1, the cutting blade unit which rotatably supports the cutting insert of the front ground is supported by the partition wall provided in the front part of the cylinder, and a motor unit that is detachably coupled to the rear end of the tubular body and is provided with an electric motor that rotationally drives the cutting insert, and the front end of the elongated tubular body of the motor unit is coupled to the cutting edge unit The rear end of the cylinder, thereby forming a channel excavator, and on the other hand, when the excavator is advanced from the vertical pit toward the front ground, instead of the motor unit, the length is shorter than the short length of the long cylinder An auxiliary motor unit in which a hydraulic motor that rotationally drives the cutting insert is disposed in the cylinder is connected to the cutting edge unit to form a temporary excavator.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4731463

In the background art, a single electric motor is disposed at the axial center of the center of the elongated cylinder. When it is desired to drive the cutting insert with a larger rotational driving force, the output of the electric motor must be enhanced. When the output is increased, the electric motor is increased in size and capacity, and the length of the long tubular body constituting the motor unit is further lengthened. Therefore, the motor unit that should be replaced with the auxiliary motor unit cannot be carried into the motor unit. The subject in the pit.

Further, since the electric motor is disposed at the axial center position of the center of the elongated tubular body, there is a problem that it is impossible to arrange the respective devices in a reasonable manner in the inside of the elongated tubular body.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a motor that can enhance the rotational driving force of a cutting blade without using a large-sized, large-capacity electric motor and can free the positions of the shafts to rationalize the machines. The way to layout the channel excavator.

The tunnel excavator according to the present invention is a main body portion that is provided to rotate a shaft that excavates a cutting insert of a front ground plate, and is provided with a hydraulic motor for rotationally driving the rotating shaft. The temporary rear main body portion is coupled, and after being advanced from the vertical pit toward the front ground, the temporary rear main body portion is replaced, and a main rear main body portion including an electric motor for rotationally driving the rotating shaft is coupled to the front main body. Further, the excavator is further characterized in that the main rear main body portion is provided with a rotation transmission shaft that is directly coupled to the rotation shaft of the front main body portion in a line, and is coupled to the rotation transmission shaft. A plurality of the above-mentioned electric motors are disposed around the rotating shaft at intervals, and a central gear is disposed to transmit the rotation And a plurality of drive gears that are rotationally driven by the respective electric motors are meshed with the sun gear.

The tunnel excavator according to the present invention is characterized in that: in the front body portion, a sand collecting chamber for collecting sand excavated by the cutting blade is formed, and is installed in the sand collecting chamber to be fixed to the front body portion. An outer cone is provided, and an inner cone that is rotationally driven together with the cutting insert is disposed in a manner fixed to the rotating shaft, and a water supply portion for supplying water to the sand collecting chamber is formed in the inner cone And a water supply pipe for supplying water to the water supply unit is fixed to the rear main body portion, and is continuously formed through the rotation axis from the rotation shaft to the rotation transmission shaft. a hollow water supply path, wherein one end of the hollow water supply path communicates with the water supply unit, and the other end of the hollow water supply path is connected to the water supply pipe via a rotary joint provided at a shaft end of the rotation transmission shaft.

In the channel excavator of the present invention, the rotational driving force of the cutting blade can be enhanced without using a large-sized, large-capacity electric motor, and the positions of the axes can be freed to arrange the machines in a reasonable manner.

1‧‧‧channel excavator

2‧‧‧Front main body

3‧‧‧ Temporary rear body

4‧‧‧Formal post main body

5‧‧‧End panel

6‧‧‧Cutter Cutter

7‧‧‧ partition wall

8‧‧‧Sand collection room

9‧‧‧Rotary axis

10‧‧‧through holes

11‧‧‧ bearing unit

11a‧‧‧ Bearing

12‧‧‧Tooth Couplings

13‧‧‧Internal gear

14‧‧‧Inner cone

15‧‧‧Outer cone

16‧‧‧Front main body drain pipe

17‧‧‧The front body is sent to the mud pipe

18‧‧‧ Rear main body drain pipe

19‧‧‧After the main body, the mud pipe

20‧‧‧ Rear main body drain pipe

21‧‧‧After the main body, the mud pipe

22‧‧‧Support wall

23‧‧‧Hydraulic motor

24‧‧‧External gear

25‧‧‧ mud line

26‧‧‧Silicon line

27‧‧‧Electric motor

27a‧‧‧Drive shaft

28‧‧‧ bolts

29‧‧‧Support wall

30‧‧‧Support wall

31‧‧‧Rotary transmission shaft

31a‧‧‧Axis end of the rotating transmission shaft

32‧‧‧through holes

33‧‧‧ bearing

34‧‧‧ Cover

35‧‧‧External gear

36‧‧‧Center gear

37‧‧‧ bearing

38‧‧‧ drive gear

39‧‧‧ Direction Correction Jack

40‧‧‧中折部

41‧‧‧Water Supply Department

41a‧‧‧Open end

41b‧‧‧ Hole Department

42‧‧‧Water supply pipe

43‧‧‧ Hollow water supply path

43a‧‧‧After formal main body side hollow water supply path

43b‧‧‧ front main body side hollow water supply path

44‧‧‧ sealing joint

45‧‧‧Rotary joint

45a‧‧‧Connecting Department

46‧‧‧立坑

47‧‧‧Advance support

48‧‧‧Support frame

49‧‧‧ Linked Framework

50‧‧‧Horizontal launching platform

51‧‧‧Promoting jacks

51a‧‧‧ Telescopic rod

51b‧‧‧Cylinder Department

51c‧‧‧Rear end flange

52‧‧‧Reaction force bearing platform

53‧‧‧Pushing plate

53a‧‧ hole

54‧‧‧through hole

55‧‧‧Adapter

56‧‧‧Into the pit

57‧‧‧Generator

59‧‧‧1st control tube

60‧‧‧2nd control tube

61‧‧‧ buried tube

G‧‧‧front site

Fig. 1 is a schematic side cross-sectional view showing a preferred embodiment of the tunnel excavator of the present invention and showing a state before the front main body portion is coupled to the temporary rear main body portion.

Fig. 2 is a schematic side cross-sectional view showing a state in which a temporary main body portion is coupled to a front main body portion shown in Fig. 1;

Fig. 3 is a schematic side cross-sectional view showing a state before the main body portion is connected to the main body portion after the main body portion shown in Fig. 1;

Fig. 4 is a schematic side cross-sectional view showing a state in which the main rear main body portion shown in Fig. 3 is coupled to the front main body portion.

Fig. 5 is a side cross-sectional view showing details of a state in which the front main body portion and the main rear main body portion are connected in Fig. 4;

Figure 6 is a cross-sectional view taken along line A-A of Figure 5.

Figure 7 is a cross-sectional view taken along line B-B of Figure 5.

Fig. 8 is an explanatory view for explaining a first step of the passage construction by the tunnel excavator shown in Figs. 1 to 5;

Fig. 9 is an explanatory view for explaining a second step of the passage construction by the tunnel excavator shown in Figs. 1 to 5;

Fig. 10 is an explanatory view for explaining a third step of the passage construction by the tunnel excavator shown in Figs.

Fig. 11 is an explanatory view for explaining the fourth step of the passage construction by the tunnel excavator shown in Figs.

Fig. 12 is an explanatory view for explaining the fifth step of the passage construction by the tunnel excavator shown in Figs.

Fig. 13 is an explanatory view for explaining a sixth step of the passage construction by the tunnel excavator shown in Figs.

Figure 14 is a plan view showing the feeding mechanism applied to the tunnel excavator shown in Figures 1 to 5.

Figure 15 is a rear elevational view of the advancement mechanism shown in Figure 14.

Hereinafter, a preferred embodiment of the tunnel excavator of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 shows the front of the tunnel excavator of this embodiment. FIG. 2 is a schematic side cross-sectional view showing a state in which the main body portion is connected to the temporary rear main body portion, and FIG. 2 is a schematic side cross-sectional view showing a state in which the main body portion is temporarily connected to the main body portion shown in FIG. 1 , and FIG. 3 is a view showing FIG. FIG. 4 is a schematic side cross-sectional view showing a state in which the main body portion is connected to the front main body portion before the main body portion is connected, and FIG. 4 is a schematic side cross-sectional view showing a state in which the main rear main body portion shown in FIG. 3 is coupled to the front main body portion, and FIG. 5 is a view showing FIG. FIG. 6 is a cross-sectional view taken along line AA of FIG. 5, and FIG. 7 is a cross-sectional view taken along line BB of FIG. 5, showing a side cross-sectional view showing details of the connection state between the front main body portion and the main rear main body portion.

The tunnel excavator 1 of the present embodiment is for embedding a small-diameter pipe body. The tunnel excavator 1 connects the front main body portion 2 and the temporary rear main body portion 3 to excavate the front ground plate G at the time of advancement, and replaces the temporary rear main body portion 3 with the temporary rear main body portion 3 after joining, and connects the main rear main body portion 4 to the front main body portion 2, Thereafter, the front ground G is further excavated.

As shown in FIGS. 1 to 5, the front main body portion 2 is formed as a hollow cylinder which is opened toward the front toward the front end of the front tray G and which is closed by the end panel 5 after the temporary rear main body portion 3 or the main rear main portion 4 is joined. shape. At the front end of the front main body portion 2, a disk-shaped cutting insert 6 having a plurality of cutting edges and being rotationally driven to excavate the front ground is provided.

A partition wall 7 is provided in the front main body portion 2 so as to face the cutting insert 6. The partition wall 7 closes the cutting insert 6 side with respect to the end panel 5 side in a watertight manner. A sand collecting chamber 8 for collecting the sand excavated by the cutting insert 6 is formed between the partition wall 7 in the front main body portion 2 and the cutting insert 6.

In the front main body portion 2, a rotary shaft 9 that is coupled to the center of rotation of the cutting insert 6 to rotationally drive the cutting insert 6 is provided. The rotating shaft 9 is horizontally disposed along the front and rear longitudinal directions of the front main body portion 2. The rotating shaft 9 is provided to penetrate the through hole 10 formed in the central portion of the partition wall 7 and the end panel 5. At a position from the partition wall 7 to the through hole 10 of the end panel 5, a rotating shaft 9 is provided and the rotating shaft is supported in a watertight state. 9 A bearing unit 11 of a hollow cylindrical shape which is made to rotate freely.

Specifically, the bearing unit 11 is configured to include a self-aligning thrust roller bearing 11a that supports the rotating shaft and supports the rotating shaft at both ends in the longitudinal direction. The rotating shaft 9 is rotatably provided to the front main body portion 2 via the bearing unit 11 . The rotating shaft 9 whose front end is coupled to the cutting insert 6 is extended rearward from the bearing unit 11 and has an inner gear 13 constituting the toothed coupling 12.

The inner cone 14 is fixedly disposed on the front end side of the rotary shaft 9 coupled to the cutting insert 6 so as to be positioned in front of the partition wall 7. The inner cone 14 is rotationally driven together with the cutting insert 6 by the rotation of the rotary shaft 9. In the front body portion 2, an outer cone 15 is fixedly disposed facing the inner cone 14. The outer cone 15 and the inner cone 14 pulverize the bulk soil collected into the sand collecting chamber 8 by rotating the inner cone 14 with respect to the outer cone 15.

A front main body portion dredging pipe 16 is provided between the partition wall 7 and the end panel 5 at a lower portion from a central portion where the through hole 10 is formed. The port portion of the front body portion drain pipe 16 is connected to the lower portion of the sand collecting chamber 8 in a watertight manner through the partition wall 7. After the front body portion drain pipe 16 is passed through the end panel 5, the port portion is detachably coupled to the main body portion drain pipes 18 and 20, respectively, provided with the temporary rear main body portion 3 and the main rear main body portion 4.

Between the partition wall 7 and the end panel 5, similarly to the front main body portion dredging pipe 16, the front main body portion is disposed side by side with the front main body portion dredging pipe 16 at a lower portion from a central portion where the through hole 10 is formed. Send the mud pipe 17. Before the front body portion of the mud pipe 17, the port portion is watertightly passed through the partition wall 7 to communicate with the lower portion of the sand collecting chamber 8. After the front main body portion of the sump pipe 16, the port portion passes through the end plate 5, and is detachably coupled to each of the temporary rear main body portion 3 or the main rear main body portion 4, and then connected to the main body portion sump pipes 19 and 21.

As shown in FIGS. 1 and 2, the front main body portion 3 is detachably coupled to the front main body portion 2 by bolts or the like. The temporary rear main body portion 3 is formed in a hollow cylindrical shape in which a support wall 22 is provided at a front end facing the front main body portion 2 to be closed and the rear end is opened. A hydraulic motor 23 is mounted and supported at a central portion of the support wall 22.

A drive shaft constituting the gear coupling 12 is provided on a drive shaft of the hydraulic motor 23 that protrudes forward from the support wall 22. The external gear 12 of the hydraulic motor 23 and the internal gear 13 of the rotary shaft 9 are detachably coupled to each other to constitute a gear coupling 12 for transmitting power.

A rear main body portion dredging pipe 18 and a rear main body portion dredging pipe 19 are protruded from the lower portion of the supporting wall 22, and the rear main body portion dredging pipe 18 is detachably coupled to the front main body at the front port portion. After the portion of the mud pipe 16 is connected to the port portion, the rear body portion of the mud pipe 19 is detachably coupled to the port portion of the front body portion of the mud pipe 17. After the rear main body portion drain pipe 18 is followed by the port portion and the rear main body portion of the mud transfer pipe 19, the port portion is detachably coupled to the mud discharge line 25 and the mud feed line 26 at the rear end side of the temporary rear main body portion 3, respectively.

When the front ground plate G is excavated, when the hydraulic motor 23 is driven, the rotary shaft 9 is rotationally driven via the toothed coupling 12, and the cutting insert 6 and the inner cone are rotationally driven by the rotationally driven rotary shaft 9. 14. Further, the mud water supplied from the rear main body portion conveying pipe 19 through the front main body portion conveying pipe 17 is introduced into the sand collecting chamber 8, and the muddy water in the sand collecting chamber 8 is passed through the front main body portion of the mud discharging pipe 16 and thereafter. The main body drain pipe 18 is discharged.

In Figures 3 to 5, a formal rear body portion 4 is shown. The main rear main body portion 4 is also formed into a hollow cylindrical body shape similarly to the temporary rear main body portion 3. In the main rear main body portion 4, an electric motor 27 is provided instead of the hydraulic motor 23.

In the case where a high-strength ground plate is partially present, the hydraulic motor 23 cannot withstand an overload, and therefore there is a case where the pressure oil is discharged and cannot be rotated. on the other hand, In the electric motor 27, even in such a region, the tunnel can be continued without stopping the rotation. However, when comparing the hydraulic motor 23 of the same output with the length of the electric motor 27 in the front-rear direction, the electric motor 27 is structurally longer than the hydraulic motor 23. As described above, since the length dimension of the electric motor 27 is longer than that of the hydraulic motor 23, the length of the rear main body portion 4 is formed longer than the temporary rear main body portion 3.

Similarly to the temporary rear main body portion 3, the main rear main body portion 4 is also detachably connected to the front main body portion 2 by bolts 28 and the like. A pair of support walls 29, 30 are provided at a front end of the main rear main body portion 4 facing the rear end of the front main body portion 2 at intervals in the front-rear direction.

The main rear main body portion 4 is provided with a rotation transmission shaft 31 that is directly connected in series to the rotation shaft 9 of the front main body portion 2. That is, the rotation transmission shaft 31 has its rotation center coincident with the rotation center of the rotation shaft 9 and is horizontally disposed along the front and rear longitudinal directions of the main rear main body portion 4. The rotation transmission shaft 9 is provided through a through hole 32 formed in a central portion of the pair of support walls 29 and 30. The through hole 32 of each of the support walls 29 and 30 is provided with a self-aligning roller bearing 33 that supports the rotation transmission shaft 31 so as to be rotatable. The rotation transmission shaft 31 is rotatably provided to the main rear main body portion 4 by the bearing 33 provided on the support walls 29 and 30 so as to be supported at both ends along the axial direction.

The shaft end portion 31a of the rotation transmission shaft 31 projecting rearward from the rear support wall 30 is covered by a cover 34. A gear 35 constituting the toothed coupling 12 is provided at the front end of the rotation transmission shaft 31 that protrudes forward from the front support wall 29, similarly to the drive shaft of the hydraulic motor 23. The outer gear 13 of the rotation transmission shaft 31 and the internal gear 13 of the rotary shaft 9 are detachably coupled to each other to constitute a gear coupling 12 for transmitting power. A sun gear 36 is provided on the rotation transmission shaft 31 so as to be positioned between the bearings 33 of the pair of front and rear support walls 29 and 30.

Further, as shown in FIGS. 6 and 7 , the pair of front and rear support walls 29 and 30 are rotated at the lateral position and the upper position from the central portion where the through hole 32 is formed. A plurality of electric motors 27 are disposed around the shaft of the transmission shaft 31 at intervals. The electric motor 27 has its body attached to the rear support wall 30 and fixed, and its front end of the drive shaft 27a is rotatably supported by the front support wall 29 via the roller bearing 37.

A drive gear 38 is provided to the drive shaft 27a of each electric motor 27, and the plurality of drive gears 38 are meshed with the sun gear 36, respectively. Therefore, when a plurality of electric motors 27 are driven, the rotational driving force is transmitted to the sun gear 36 via the plurality of drive gears 38, and the rotation transmission shaft 31 is rotationally driven by the rotational driving force transmitted to the sun gear 36. In the example of the figure, the electric motor 27 is provided in three sets, but it may be set to any of two or more.

The rear main body portion drain pipe 20 and the rear main body portion are disposed on the pair of support walls 29 and 30 so as to be offset from the lower portion from the central portion where the through hole 32 is formed and penetrate the pair of support walls 29 and 30. The mud pipe 21 is sent. When the main body portion 3 is replaced with the main rear main body portion 4, the port portions of the rear main body portion mud discharge pipe 20 and the rear main body portion mud supply pipe 21 are detachably coupled to the front body portion 2 16 and each of the rear port portions of the mud pipe 17. Thereby, the mud collecting water is supplied and discharged to the sand collecting chamber 8. In the port portion after the rear main body portion of the mud discharge pipe 20, the sludge discharge line 25 is detachably connected, and the sludge supply line 26 is detachably coupled to the port portion after the rear main body portion of the mud supply pipe 21.

In the main rear main body portion 4, the space between the rear main body portion feed pipe 21 and the rear main body portion dredging pipe 20 and the electric motor 27 and the electric motor 27 are arranged at intervals in the circumferential direction thereof. There are four direction correction jacks 39 provided in the space between them. Therefore, the main rear main body portion 4 is formed to be bendable forward and backward by being disposed side by side in the folded portion 40 of the direction correcting jack 39.

In the tunnel excavator 1 of the present embodiment, the inner cone 14 is formed with a water supply portion that communicates with the sand collecting chamber 8 and supplies mud water or the like to the sand collecting chamber 8. 41. The water supply unit 41 is formed by a hole portion 41b that is formed to penetrate from the center of rotation of the inner cone 14 in the radial direction and has an open end 41a that opens toward the sand collecting chamber 8. Further, in the main rear main body portion 4, a water supply pipe 42 that is disposed behind the pair of support walls 29 and 30 and that supplies water to the water supply unit 41 is fixedly disposed. In the illustrated example, the water supply pipe 42 is disposed from the mud supply line 26 and is supplied with muddy water.

Further, in the main rear portion of the main body portion 4, the rotation transmission shaft 31 is disposed at a position along the rotation axis thereof along the rotation axis, and the shaft end portion 31a covered by the free cover 34 passes through the front end to form a main rear main body portion side hollow water supply. Path 43a. Further, the front shaft portion side hollow water supply path 43b is formed in the rotation shaft 9 of the front main body portion 2 at a position along the rotation axis thereof, and extends from the rear end to the inner end cone 14 of the front end. The front end of the front main body side hollow water supply path 43b communicates with the hole portion 41b forming the water supply portion 41.

The front main body side hollow water supply path 43b is disposed at a position where the internal gear 13 of the rotary shaft 9 meshes with the external gear 35 of the rotation transmission shaft 31 and the gears 13, 35 are rotated at the same speed. The main rear main body side hollow water supply path 43a is continuously and detachably connected by a sealing joint 44 provided between the main body side.

In other words, the self-rotating rotating shaft 9 to the rotation transmitting shaft 31 continuously penetrates the hollow water supply path 43 along the rotation axis of the same. A rotary joint 45 having a communication portion 45a that communicates with the main rear main body side hollow water supply path 43a in a watertight manner through the lid 34 is provided in the shaft end portion 31a of the rotation transmission shaft 31, and a water supply pipe 42 is connected to the rotary joint 45. . Thereby, the hollow water supply path 43 is detachably coupled to the water supply pipe 42 via the rotary joint 45.

According to this configuration, the water supply device is provided at the installation position of the rotary shaft 9 and the rotation transmission shaft 31 disposed at the center of the front main body portion 2 and the main rear main body portion 4, and the water supply device is inserted in the longitudinal direction of the front and rear, and the like. And feeding water toward the excavation face, and by the The water is supplied to prevent the soil from adhering to the inner surface of the inner cone 14 or the outer cone 15 and the sand collecting chamber 8.

Next, the action of the tunnel excavator 1 of the present embodiment will be described using the step diagrams of Figs. 8 to 13 . When the channel excavator 1 excavates the tunnel from the vertical pit 46, when the cross-sectional area of the vertical pit 46 is narrow, if the length of the tunnel excavator 1 is too long, it cannot be carried into the vertical pit 46 from the ground, or Even if it can be carried in, it may be difficult to carry out the excavation work of the self-standing pit 46 toward the front ground G.

When the inside of the tunnel 46 is carried in, the length of the tunnel excavator 1 is shortened, and the temporary rear main body portion 3 including the hydraulic motor 23 is coupled to the front main body portion 2, whereby the tunnel excavator 1 can be moved into the vertical pit 46. Move in and move it toward the front ground G. In other words, first, the tunnel excavator 1 that connects the temporary rear main body portion 3 to the front main body portion 2 by a crane or the like is suspended and carried into the vertical pit 46, and as shown in Fig. 8, the tunnel excavator 1 is directed toward the front ground plate G. It is disposed on the hair feeding support 47 disposed on the bottom of the vertical pit 46.

Fig. 14 is a plan view showing a feeding mechanism applied to the tunnel excavator 1 shown in Figs. 2 and 4, and Fig. 15 is a rear view showing the feeding mechanism shown in Fig. 14. The hair feeding support 47 is configured such that the support frames 48 are laid in parallel with each other in the front-rear direction on both sides of the inner bottom surface of the vertical pit 46, and the supporting frames 48 are opposed by a plurality of connecting frames 49. The inner side surface is integrally connected to each other, and the horizontal hair extension table 50 that slidably supports the lower peripheral surface of the front main body portion 2 and the temporary rear main body portion 3 is disposed in the center portion between the support frames 48 in the front-rear direction, and the bolts are used. The horizontal hair feed table 50 is fixed to the upper surface of the central portion of the joint frame 49 orthogonal to the horizontal hair feed table 50.

Further, a pair of right and left thrust jacks 51 are disposed on the support frames 48 on both sides, and the telescopic rods 51a projecting toward the thrust jacks 51 abut against the reaction force receiving table 52 fixed to the wall surface behind the vertical pits 46. And the cylinder portion 51b of the advancement jack 51 that advances along with the extension of the telescopic rod 51a is inserted into the push plate 53. The hole 53a at the both end portions terminates the rear end flange portion 51c of the cylinder portion 51b with the hole 53a, and presses the central portion of the front surface of the pressing plate 53 against the passage provided on the horizontal advancement table 50. 1 after the temporary rear body 3 rear end.

A through hole 54 is formed in a central portion of the pressing plate 53, and the adapter 55 is connected to the rear main body portion of the mud pipe 18 and the rear main body portion of the mud pipe 19 through the through hole 54 to thereby feed the mud pipe 26 and a mud line 25 are connected to the adapter 55. Moreover, as the propulsion jack 51, a two-stage jack is used.

After the channel excavator 1 is placed on the feed support 47, if the pair of right and left thrust jacks 51 are actuated and the telescopic rod 51a is extended, the reaction force receiving table 52 obtains a reaction force to advance the cylinder portion of the jack 51. When the step 51b advances, the pressing plate 53 connected to the cylinder portion 51b in the erected state is integrally advanced, and the channel excavator 1 is placed on the horizontal ejector table 50 while pressing the rear end of the temporary rear main body portion 3 with the front surface thereof. The upper side advances toward the entry opening 56, so that the front ground G is excavated from the entry opening 56.

The excavation of the ground is performed by driving the hydraulic motor 23 in the temporary rear main body portion 3 and transmitting the rotational driving force thereof to the cutting insert 6 via the rotary shaft 9, thereby making the cutting The cutter head 6 is rotated to advance the tunnel excavator 1 and the excavated sand is collected into the sand collecting chamber 8. At this time, when the bulk soil has been collected into the sand collecting chamber 8, it is pulverized finely by the inner cone 14 and the outer cone 15.

Further, during the excavation, the muddy water is supplied from the ground to the temporary rear main body portion 3 via the feed line 26, and then the main body portion feed pipe 19 is connected to and communicated with the rear main body portion feed pipe 19 before the main body portion 2 is connected. The main body portion feed pipe 17 supplies the muddy water to the sand collecting chamber 8 and fills it with the sand collecting chamber 8, and mixes it with the excavated sand to make the excavated sand soil, and by filling the sand collecting chamber 8 Mud water is pressed against the excavation surface The front ground plate G is excavated by the cutting blade 6 while preventing the collapse of the excavation surface.

On the other hand, the soiled sand in the sand collecting chamber 8 is sent out from the front main body portion 2 to the main body portion drain pipe 16 through the front main body portion drain pipe 16 through the front main body portion drain pipe 16, and then through the mud discharging pipe. 25, and the muddy water is fed to the separation tank (not shown) provided on the ground, and after the excavation sand is separated from the muddy water in the separation tank, the muddy water is again supplied to the sludge supply line 26. .

In this way, on the advance support 47, the tunnel excavation 1 is connected to the front ground plate G by the tunnel excavator 1 connecting the temporary rear main body portion 3, and the tunnel is drilled until the front portion of the front main body portion 2 and the temporary rear main body portion 3 are joined. Before entering the passage, that is, just before entering the entry opening 56, the excavation of the passage is stopped at this position.

In the stopped state, the front main body portion drain pipe 16 and the front main body portion dredging pipe 17 in the front main body portion 2 are separated from the main body portion dredging pipe 18 and the rear main body portion dredging pipe 19 in the temporary rear main body portion 3, After the front main body portion 2 and the temporary rear main body portion 3 are disconnected, the temporary rear main body portion 3 is retracted to remove the toothed coupling 12, whereby the hydraulic motor 23 of the temporary rear main body portion 3 is removed. After the main body portion 2 is separated, the temporary rear main body portion 3 is removed from the vertical pit 46 to the ground side by a crane or the like and recovered (see Fig. 9).

Then, the main rear main body portion 4 is suspended by the crane or the like and carried into the vertical pit 46, and after being placed on the advance support 47, the telescopic rods 51a of the pair of right and left thrust jacks 51 are extended, whereby the push plate 53 is pushed. The rear end of the main rear main body portion 4 is advanced, and the main rear main body portion 4 is brought into contact with the front main body portion 2, and as shown in FIG. 4, the main body portion 4 is integrally coupled by bolts 28 and the like, and via the toothed coupling 12 The rotation shaft 9 of the front main body portion 2 and the rotation transmission shaft 31 of the main rear main body portion 4 are coupled.

When the rotating shaft 9 is coupled to the rotation transmitting shaft 31, the hollow water supply path 43 is continuously formed from the front main body portion 2 to the main rear main body portion 4 via the sealing joint 44. On the side of the rotation transmission shaft 31 of the hollow water supply path 43, the water supply pipe 42 is connected in advance via the rotary joint 45, and the water supply portion 41 of the inner cone 14 is communicated with the side of the rotary shaft 9 of the hollow water supply path 43, and the water is supplied from the water supply pipe 42. The water can be supplied to the sand 8 of the excavation face side.

Further, after the main rear main body portion 4, the main body portion drain pipe 20 and the rear main body portion dredging pipe 21 are connected to and communicate with the front main body portion drain pipe 16 and the front main body portion dredging pipe 17, respectively, and The mud discharge line 25 and the mud transfer line 26 are connected to the rear main body portion drain pipe 20 and the rear main body portion feed pipe 21. Further, a plurality of electric motors 27 are connected to the generator 57 provided on the ground via wiring (see FIG. 10).

After the main rear main body portion 4 is connected to the front main body portion 2 as described above, the pair of left and right thrust jacks 51 are actuated to extend the telescopic rod 51a, and the reaction is reversed as in the case of the temporary rear main body portion 3. The force receiving table 52 acquires the reaction force and advances the main rear main body portion 4 via the pressing plate 53, and drives a plurality of electric motors 27 in the main rear main body portion 4.

The rotational driving force of the plurality of electric motors 27 is input to the sun gear 36 via the respective drive gears 38, thereby rotationally driving the rotation transmission shaft 31. The rotational driving force of the rotation transmitting shaft 31 is transmitted to the rotating shaft 9 via the toothed coupling 12, whereby the cutting insert 6 can be rotationally driven to dig the passage.

The excavated sand soil is collected into the sand collecting chamber 8 as described above, and after being crushed finely by the inner cone 14 and the outer cone 15, the front body portion drain pipe 16, the rear body portion drain pipe 17, The mud line 25 is discharged. At this time, the sand collecting chamber 8 is supplied with muddy water from the sludge feeding line 26 via the rear main body portion conveying pipe 21 and the front main body portion conveying pipe 17.

Further, in the rotational driving of the cutting insert 6, the hollow water supply path 43 continuously formed by the spin transfer shaft 31 to the rotary shaft 9 is introduced into the hollow water supply path through the rotary joint 45. 43 mud water reaches the inner cone The water supply portion 41 of the body 14 is supplied to the sand collecting chamber 8, whereby the sand is restrained from adhering to the inner cone 14, the outer cone 15, and the sand collecting chamber 8 to be consolidated.

If the main rear main body portion 4, which is connected to the front main body portion 2, is dug until it is about to enter the advancement pit 56, the excavation of the passage is temporarily stopped, and the push plate 53 is retracted by contracting the telescopic rods 51a of the pair of left and right thrust jacks 51. After the main body portion 4 and the pressing plate 53 are formed, the interval between the tubular bodies that can be disposed is formed.

First, the first control pipe 59 of various equipment such as the hydraulic pressure unit or the control panel for the hydraulic machine and the target of the excavation direction is connected. At this time, the mud discharge line 25 and the mud transfer line 26 are also connected to the main body portion drain pipe 20 and the rear main body portion feed pipe 21 (see FIG. 11) via the first control pipe 59.

Then, a plurality of electric motors 27 are actuated to rotate the cutting insert 6, and the push jack 51 is actuated to extend the telescopic rod 51a, whereby the rear end of the first control tube 59 is pressed forward by the pressing plate 53. The first control pipe 59 is pushed to advance the front main body portion 2 integrally with the main rear main body portion 4, and the passage is made by the cutting insert 6.

Then, when a channel having a fixed length corresponding to the length of the first control pipe 59 is excavated, as shown in FIG. 12, the second control pipe 60 including the sliding material injection port or the bypass valve is connected to the first control. In the same manner, the tube 59 is pushed in the same manner as the first control tube 59 and the first control tube 59 while the passage of the fixed length corresponding to the length of the second control tube 60 is drilled.

Then, as shown in FIG. 13, after the second control pipe 60, a buried pipe 61 such as a Hume tube is added, and the rear end thereof is advanced by the pusher plate 53 by the push jack 51 in the same manner as described above, and the cutting is performed by cutting. The cutter head 6 advances it into the tunnel being excavated.

Then, each time a channel having a fixed length corresponding to the length of one of the buried pipes 61 is excavated, the embedded pipe 61 is sequentially added and pushed forward, thereby extending the self. The vertical pit 46 reaches the entire length of the passage of the vertical pit (not shown) on the arrival side to form a pipe such as a water pipe formed by a row of buried pipes 61. When reaching the standing pit on the arrival side, the front main body portion 2 or the main rear main body portion 4 and the first and second control tubes 59 and 60 are sequentially separated and removed to the ground side.

In the tunnel excavator 1 of the present embodiment described above, the main rear portion 4 is provided with a rotation transmission shaft 31 that is directly connected in series with the rotating shaft 9 of the front main body portion 2, and separates the plurality of electric motors 27 from each other. The center gear 36 is disposed around the shaft of the rotation transmission shaft 31 at intervals, and the plurality of drive gears 38 that are rotationally driven by the respective electric motors 27 are meshed with the sun gear 36, so that the large gear is not used. The large-capacity electric motor can enhance the rotational driving force of the cutting blade 6 by using a plurality of electric motors 27. Further, regarding the arrangement of the electric motor 27, the axial position of the rotary shaft 9 or the rotary transmission shaft 31 can be vacated and the respective machines can be arranged in a reasonable manner.

Further, in the present embodiment, the sand collecting chamber 8 for collecting the sand excavated by the cutting insert 6 is formed in the front main body portion 2, and is provided in the sand collecting chamber 8 so as to be fixed to the front main body portion 2. The outer cone 15 is provided with an inner cone 14 that is rotationally driven together with the cutting insert 6 in a manner fixed to the rotary shaft 9, and the inner cone 14 is formed with a water supply portion 41 for supplying water to the sand collecting chamber 8. In the main rear main body portion 4, a water supply pipe 42 for supplying water to the water supply portion 41 is fixed, and the rotating shaft 9 is rotated from the rotation shaft 9 to the rotation transmission shaft 31, and a hollow water supply path is continuously formed along the rotation axis thereof. A one end of the hollow water supply path 43 communicates with the water supply unit 41, and the other end of the hollow water supply path 43 is connected to the water supply pipe 42 via a rotary joint 45 provided at the shaft end portion 31a of the rotation transmission shaft 31, thereby utilizing The position of the shaft center where the electric motor 27 is arbitrarily disposed at the axial center position of the rotary shaft 9 or the rotation transmission shaft 31 is provided, and the water supply path for facilitating the smooth excavation work can be reasonably ensured inside the tunnel excavator 1 .

1‧‧‧channel excavator

2‧‧‧Front main body

4‧‧‧Formal post main body

5‧‧‧End panel

6‧‧‧Cutter Cutter

7‧‧‧ partition wall

8‧‧‧Sand collection room

9‧‧‧Rotary axis

10‧‧‧through holes

11‧‧‧ bearing unit

11a‧‧‧ Bearing

12‧‧‧Tooth Couplings

13‧‧‧Internal gear

14‧‧‧Inner cone

15‧‧‧Outer cone

16‧‧‧Front main body drain pipe

17‧‧‧The front body is sent to the mud pipe

20‧‧‧ Rear main body drain pipe

21‧‧‧After the main body, the mud pipe

27‧‧‧Electric motor

27a‧‧‧Drive shaft

28‧‧‧ bolts

29‧‧‧Support wall

30‧‧‧Support wall

31‧‧‧Rotary transmission shaft

31a‧‧‧Axis end of the rotating transmission shaft

32‧‧‧through holes

33‧‧‧ bearing

34‧‧‧ Cover

35‧‧‧External gear

36‧‧‧Center gear

37‧‧‧ bearing

38‧‧‧ drive gear

39‧‧‧ Direction Correction Jack

40‧‧‧中折部

41‧‧‧Water Supply Department

41a‧‧‧Open end

41b‧‧‧ Hole Department

42‧‧‧Water supply pipe

43‧‧‧ Hollow water supply path

43a‧‧‧After formal main body side hollow water supply path

43b‧‧‧ front main body side hollow water supply path

44‧‧‧ sealing joint

45‧‧‧Rotary joint

45a‧‧‧Connecting Department

Claims (2)

A passage excavator for providing a rotating shaft for driving a cutting disc of a front ground to be provided before the main body portion, and capable of replacing the hydraulic motor having the rotating shaft for rotation The main body portion is coupled, and after being advanced from the vertical pit toward the front ground, the temporary rear main body portion is replaced, and the main rear main body portion including the electric motor for rotationally driving the rotating shaft is coupled to the front main body portion. Further, the excavator is further characterized in that a pair of front and rear support walls are provided at a front end of the front rear main body portion facing the rear end portion of the front main body portion at intervals in the front-rear direction. a central portion of the pair of support walls is formed with a through hole penetrating through the through hole, and the main rear main body portion is provided with a rotation transmission shaft that is directly coupled to the rotation shaft of the front body portion in a line, respectively Roller bearings are provided in the through holes of the pair of support walls, and the roller bearings are aligned in the axial direction The rotation transmission shaft is supported at both ends, and is rotatably supported by the main rear main body portion, and an external gear is provided at a front end of the rotation transmission shaft that protrudes forward from the front support wall, and the external gear is attached and detached Freely coupled to the internal gear provided on the rotating shaft, the rotation transmission shaft is provided with a sun gear that is positioned between the roller bearings of the pair of support walls, and the rotation transmission shaft A plurality of the electric motors are disposed around the rotating shaft at intervals, and the electric motors are mounted on the main body and fixed at the rear. The support wall has a support wall that is rotatably supported by the front end of the drive shaft via a roller bearing, and a plurality of drive gears that are rotationally driven by the respective electric motors are meshed with the center gear. The tunnel excavator of claim 1, wherein in the front body portion, a sand collecting chamber for collecting sand excavated by the cutting blade is formed, and is disposed in the sand to be fixed to the front body. The outer cone is provided in the manner of being fixed to the rotating shaft, and the inner cone is rotatably driven together with the cutting insert, and the inner cone is formed on the sand collecting chamber. a water supply unit for supplying water, and a water supply pipe for supplying water to the water supply unit is fixed to the main rear main body portion, and is rotated from the rotation shaft to the rotation transmission shaft, along a rotation axis thereof a hollow water supply path is continuously formed, and one end of the hollow water supply path is in communication with the water supply unit, and the other end of the hollow water supply path is connected to the above through a rotary joint provided at a shaft end of the rotation transmission shaft. Water pipe.