JP4151488B2 - Parent-child shield machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to child shield machine having a copying cutter equipment performing outbreak of the outer periphery of the cutter frame to rotate.
[0002]
[Prior art]
The shield machine is adapted to dig in the ground by the rotation of a cutter provided at the tip of the shield machine and the propulsive force of the shield jack. A plurality of bits are provided on the front surface of the cutter, and these bits cut the face and excavate the natural ground.
[0003]
The cutter is provided with a copy cutter device for excavating the outer periphery of the cutter frame when the shield machine advances a curve or meandering or corrects the direction of excavation.
[0004]
The copy cutter device is provided so as to be able to protrude and retract in the radial direction from the outer peripheral surface of the cutter frame, and a bit is formed at the outer peripheral end thereof. When the copy cutter that rotates together with the cutter frame is positioned inside the curve, the copy cutter protrudes radially outward from the outer peripheral surface of the cutter frame, so that the inside of the curve is dug.
[0005]
As a conventional copy cutter apparatus, there is one as shown in FIG. 11 (for example, see Patent Document 1).
[0006]
As shown in the figure, in the copy cutter device 51, a copy cutter main body 52 and a hydraulic jack 53 that moves the copy cutter main body 52 in the radial direction extend in the radial direction and are linearly connected. The copy cutter main body 52 is supported inside a cutter pork 54 constituting a cutter frame via a slide bearing 55, and is formed in a rod shape that is long in the radial direction in order to secure a support length.
[0007]
In the copy cutter device 51, the cylinder portion 56 of the hydraulic jack 53 is provided in the copy cutter main body 52, and the cylinder portion 56 is formed to have the same diameter as the copy cutter main body 52. As a result, the cylinder portion 56 can gain a support length to the sliding bearing 55, so that the entire radial length of the copy cutter device 51 can be shortened by the length of the cylinder portion 56, and the copy cutter device 51 can be installed. The space could be reduced.
[0008]
[Patent Document 1]
Japanese Utility Model Publication No. 60-15836 [0009]
[Problems to be solved by the invention]
Although the above-described copy cutter device 51 is shortened in the radial direction, the copy cutter body 52 and the hydraulic jack 53 extend in the radial direction and are connected in a straight line. An installation space longer than the combined length of the copy cutter main body 52 and the hydraulic jack 53 is required, and it can only be attached to a member that is long in the radial direction, such as the cutter pork 54. In a parent-child shield machine in which a small-diameter shield is housed, the radial direction length of the large-diameter shield is short, so that it is very difficult to apply the copy cutter device 51.
[0010]
Accordingly, the present invention has been devised to solve the above-described problems, and an object of the present invention is to provide a parent-child shield machine equipped with a copy cutter device that can greatly reduce the length in the radial direction. .
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is a parent-child shield machine comprising a large-diameter shield and a small-diameter shield housed inside and separably connected. When the copy cutter main body is rotated by providing an opening on the outer peripheral surface plate on the outer periphery of the cutter to allow the copy cutter main body to protrude and retract, and the copy cutter main body is rotatably provided on the inner surface of the outer peripheral surface plate near the opening via a bracket. A parent-child shield machine in which a copy cutter main body protrudes and retracts from the opening, a crank arm is provided in the copy cutter main body, and a hydraulic jack is provided between the crank arm and the outer peripheral surface plate .
[0012]
According to a second aspect of the present invention, the two hydraulic jacks are provided between the crank arm and the outer peripheral plate, and the hydraulic jacks are provided so as to extend away from the crank arm. The parent-child shield machine .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0018]
FIG. 1 is a plan view and a front view showing a first preferred embodiment of a copy cutter apparatus according to the present invention, and FIG. 2 shows a first preferred embodiment of a copy cutter apparatus according to the present invention. FIG. 3 is a cross-sectional view, FIG. 3 is a front view showing a state of the copy cutter main body of the preferred first embodiment of the copy cutter device according to the present invention, and FIG. 4 is a preferred first embodiment of the shield machine according to the present invention. FIG. 5 is a sectional view showing a first preferred embodiment of a shield machine according to the present invention.
[0019]
In this embodiment, the case where the copy cutter device according to the present invention is applied to a parent-child shield machine in which a small-diameter shield is accommodated inside a large-diameter shield will be described as an example.
[0020]
As shown in FIGS. 4 and 5, the parent-child shield machine 1 includes a large-diameter shield 2 and a small-diameter shield 3 accommodated inside the large-diameter shield 2. It is connected in a separable manner.
[0021]
When excavating a large-diameter tunnel, the large-diameter shield 2 and the small-diameter shield 3 are excavated together. When excavating a small-diameter tunnel, the large-diameter shield 2 and the small-diameter shield 3 are separated from each other. Starts excavating from the large-diameter shield 2.
[0022]
A plurality of cutter spokes 6 extending radially along the radial direction are provided at the front of the small-diameter shield 3, and a plurality of cutter bits 5 are provided at the front end thereof. A copy cutter device 7 is provided inside the cutter pork 6. The copy cutter device 7 has the same configuration as the conventional copy cutter device 51 shown in FIG.
[0023]
A ring-shaped cutter frame 4 is provided at the front portion of the large-diameter shield 2, and a plurality of cutter bits 5 are provided at the front end thereof. As shown in FIG. 2, the cutter frame 4 includes a ring-shaped front plate 4a, an outer peripheral plate 4b, and a rear plate 4c. The cutter frame 4 includes a copy cutter device 8 and a chemical solution according to the present invention. An injection device (not shown), a mud pipe (not shown), and the like are provided.
[0024]
As shown in FIGS. 1 and 2, the copy cutter device 8 is pivotally supported by the cutter frame 4 via a pin 9 so as to be pivoted so that the tip end portion of the copy cutter device 8 protrudes from the outer peripheral surface of the cutter frame 4. A copy cutter main body 11 and an actuator 12 that rotates the copy cutter main body 11 about a pin 9 are provided.
[0025]
An opening 14 is formed in the outer peripheral surface plate 4 b of the cutter frame 4 for allowing the copy cutter body 11 to appear and disappear. The opening 14 is formed in a rectangular shape that is long in the circumferential direction of the cutter frame 4, and is slightly rearwardly offset from the intermediate portion when viewed in the axial direction of the outer peripheral surface plate 4 b. A pin 9 extends in the axial direction of the excavator body 15 at the radially inner portion of the opening 14 of the cutter frame 4. The pin 9 is provided in the vicinity of the outer peripheral surface of the cutter frame 4 and is bridged and fixed between two forked brackets 16 extending radially inward from the outer peripheral surface plate 4b.
[0026]
The copy cutter main body 11 is formed in a rod shape having a length slightly shorter than the circumferential length of the opening 14, and a pin 9 is rotatably inserted in the vicinity of one end portion of the copy cutter main body 11. It is designed to rotate while being inclined in the circumferential direction.
[0027]
In this embodiment, the copy cutter main body 11 is rotatably attached to the pin 9, but the copy cutter main body is fixed to the pin, and this pin is rotatably supported with respect to the cutter frame. You may do it.
[0028]
A cutter bit chip 17 is provided at the tip of the copy cutter main body 11. The cutter bit chip 17 is provided on both sides of the cutter frame 4 in the rotation direction, so that the cutter bit chip 17 can cut the earth and sand and excavate even if the cutter frame 4 rotates counterclockwise or clockwise. It has become.
[0029]
When the copy cutter main body 11 rotates about the pin 9 and rises along the radial direction of the cutter frame 4, its tip protrudes from the outer peripheral surface of the cutter frame 4 (see FIG. 1). When tilted along the circumferential direction, the tip end part of the cutter frame 4 enters the inside from the outer peripheral surface (see FIG. 3).
[0030]
A crank arm 18 is provided on the pin-side base end portion of the copy cutter main body 11. The actuator 12 is constituted by a hydraulic jack 19 that is bridged between the crank arm 18 and the cutter frame 4. The hydraulic jack 19 is disposed so as to be substantially parallel to the tangential direction of the cutter frame 4, and the base end portion of the cylinder 21 of the hydraulic jack 19 is pin-coupled to the inside of the outer peripheral surface plate 4 b of the cutter frame 4, The tip of the rod 22 is pin-coupled near the tip of the crank arm 18. The expansion and contraction of the hydraulic jack 19 causes the crank arm 18 and the copy cutter body 11 to rotate about the pin 9.
[0031]
The crank arm 18 is attached so as to be inclined with respect to the longitudinal direction of the copy cutter main body 11 so as to face inward in the radial direction when the copy cutter main body 11 is immersed in the cutter frame 4. The base end portion, the tip end portion of the rod 22, and the pin 9 are not arranged in a straight line.
[0032]
The mounting portion side (right side in FIG. 1) of the hydraulic jack 19 of the copy cutter main body 11 inside the opening 14 abuts on the side surface portion of the copy cutter main body 11 when it stands up, and further rotates. A stopper 23 is provided to restrict the movement. The stopper 23 is formed of plate-like steel or the like, and is attached to the opening 14 so that the surface thereof is parallel to the side surface of the copy cutter main body 11 in an upright state.
[0033]
Next, the extra digging process by the copy cutter apparatus 8 having the above-described configuration will be described.
[0034]
In the parent-child shield machine 1, when digging in a straight line, as shown in FIG. 3, the hydraulic jack 19 is degenerated, and the copy cutter main body 11 is immersed and stored in the cutter frame 4. The cutter is rotating.
[0035]
When the parent-child shield machine 1 corrects a curve or meandering or corrects the direction of excavation, it performs extra digging at the inner part of the curve. At this time, the copy cutter main body 11 starts to rotate from a position where the rotational phase of the cutter frame 4 is shifted 90 ° from the inner position of the curve, and when the copy cutter main body 11 is positioned inside the curve, the cutter frame 4 protrudes outward from the outer peripheral surface of 4 (stands up), and then the copy cutter main body 11 starts to rotate to the opposite side (tilt side), and the rotational phase of the cutter frame 4 is 90 ° behind the inner position of the curve. The hydraulic jack 19 is expanded and contracted so that the rotation ends at the shifted position and is stored in the cutter frame 4. This makes it possible to excavate only inside the curve.
[0036]
According to the present embodiment, the copy cutter device 8 has a copy cutter body 11 pivotally supported by the cutter frame 4 via the pin 9 and the copy cutter body 11 rotated about the pin 9. Since the actuator 12 includes the hydraulic jack 19 that is disposed substantially parallel to the tangential direction of the cutter frame 4, the radial length of the copy cutter device 8 can be shortened.
[0037]
That is, in the present embodiment, the copy jack body 11 is rotated by the hydraulic jack 19 arranged substantially parallel to the tangential direction of the cutter frame 4 so as to protrude from the outer peripheral surface of the cutter frame 4. Compared with a conventional copy cutter device (see FIG. 11) 51 in which jacks are arranged in the radial direction, the length in the radial direction can be greatly reduced.
[0038]
Therefore, the copy cutter device 8 can also be provided in the large-diameter shield 2 of the parent-child shield machine 1 in which the radial length of the installation space is short as in this embodiment.
[0039]
Further, since the radial length of the copy cutter device 8 is short, an installation space for other devices can be secured on the inner side in the radial direction, so that the installation location and number of mud pipes and the like are not limited.
[0040]
Further, since it is not necessary to provide the slide bearing 55 and the like as compared with the conventional copy cutter device (see FIG. 11) 51, the number of components is reduced and the manufacturing cost of the device can be reduced.
[0041]
Further, since the pins 9 are provided in the vicinity of the outer peripheral surface of the cutter frame 4, the length of the copy cutter main body 11 can be shortened, which is advantageous in strength.
[0042]
By the way, the copy cutter main body 11 receives the most reaction force generated from the natural ground when the cutter frame 4 rotates when it stands up. When the cutter frame 4 rotates counterclockwise in FIG. 1, when the copy cutter main body 11 stands up, it abuts against the stopper 23 located on the left side in the figure, and thus counteracts the reaction force generated by the rotation of the cutter frame 4. can do. On the other hand, when the cutter frame 4 is rotating clockwise, the reaction force is applied in the direction in which the hydraulic jack 19 is retracted when the copy cutter body 11 is erected, but on the retracted side, the pressure of the oil in the cylinder 21 is received. Since the area is large, the reaction force can be countered.
[0043]
Further, the earth pressure received by the copy cutter main body 11 from the front surface of the excavator main body 15 can be sufficiently countered because the copy cutter main body 11 does not rotate in the axial direction of the excavator main body 15.
[0045]
FIG. 6 is a plan view and a front view showing a second preferred embodiment of the copy cutter device according to the present invention, and FIG. 7 shows a second preferred embodiment of the copy cutter device according to the present invention. FIG. 8 is a cross-sectional view, and FIG. 8 is a front view showing a state when the copy cutter main body is housed in the second preferred embodiment of the copy cutter apparatus according to the present invention.
[0046]
In the copy cutter device 24 according to the second embodiment, the copy cutter body 11 and the crank arm 18 are the same as those in the first embodiment, and the actuator 25 that rotates the copy cutter body 11 includes the crank arm 18. It differs from 1st embodiment by the point comprised from the two hydraulic jacks 26 extended and provided in the circumferential direction both sides.
[0047]
The two hydraulic jacks 26 are arranged in parallel with each other in a tangential direction of the cutter frame 4 so as to have a C shape, and the base end portion of each cylinder 27 is the outer peripheral surface plate 4 b of the cutter frame 4. Each is pin-coupled inside. The tip of each rod 28 is coaxially and pin-coupled near the tip of the crank arm 18. These hydraulic jacks 26 extend and contract in synchronism with each other, and the expansion and contraction causes the crank arm 18 and the copy cutter body 11 to rotate about the pin 9.
[0048]
Since other configurations are the same as those of the copy cutter device 8 of the first embodiment, the same reference numerals are given and description thereof is omitted.
[0049]
According to the present embodiment, when the cutter frame 4 is rotated counterclockwise in FIG. 6, the hydraulic jack 26 located on the left side in the drawing is counteracted by the rotation of the cutter frame 4 applied to the copy cutter main body 11. Receive power. On the other hand, when the cutter frame 4 rotates counterclockwise, the hydraulic jack 26 located on the right side in the drawing receives the reaction force applied to the copy cutter main body 11.
[0050]
As a result, in either case of right and left rotation, the reaction force generated by the rotation of the cutter frame 4 can be countered on the side where the hydraulic jack 26 having a large oil pressure receiving area in the cylinder 21 is retracted. Therefore, even when the copy cutter main body 11 is in an inclined state (a state between standing and immersing) in the middle of the rotation, the reaction force can be counteracted and the copy cutter main body 11 can be rotated stably. Can do.
[0051]
FIG. 9 is a plan view and a front view showing a reference form of a copy cutter apparatus irrelevant to the present invention, and FIG. 10 is a cross-sectional view showing the copy cutter main body protruding and stored in the reference form .
[0052]
As shown in FIGS. 9 and 10, in the copy cutter device 31 of the reference embodiment , the pin 32 to which the copy cutter body 11 is fixed extends in the tangential direction of the cutter frame 4 and is pivotally supported. The excavator body 15 is rotated in an axial direction.
[0053]
The outer peripheral surface plate 4b of the cutter frame 4 is provided with a box 33 in which the copy cutter main body 11 is accommodated. The box 33 is formed so as to extend in the axial direction of the excavator body 15 and has an upper portion opened. The box 33 is arranged such that the upper end thereof is along the surface of the outer peripheral face plate 4b. The box 33 is connected to the upper opening, and the rear end is also opened, and is opened to the rear space 34 of the cutter frame 4.
[0054]
The pin 32 is provided near the front end in the box 33 and is pivotally supported by the side walls 35 on both sides in the circumferential direction. The pin 32 is integrally fixed to the base end portion of the copy cutter body 11. One end of the pin 32 passes through the side wall 35, and a rotating shaft 38 of a rotary motor 37 that is an actuator 36 that rotates the copy cutter body 11 is coaxially fixed to one end of the pin 32.
[0055]
The rotary motor 37 has a rotational torque that can rotate against the earth pressure that the copy cutter main body 11 receives from the front surface of the excavator main body 15. The rotary motor 37 is accommodated in a casing 39 provided adjacent to the box 33 inside the cutter frame 4.
[0056]
According to the present embodiment , the copy cutter device 31 can be made more compact by providing the pin 32 along the tangential direction of the cutter frame 4 and directly connecting the actuator 36 including the rotary motor 37 to the pin 32. it can.
[0057]
Further, since the copy cutter main body 11 does not rotate in the circumferential direction of the cutter frame 4, it can sufficiently counter the reaction force generated by the rotation of the cutter frame 4. The earth pressure received by the copy cutter main body 11 from the front surface of the excavator main body 15 is countered by the rotational torque of the rotary motor 37. Therefore, the stable copy cutter body 11 can be rotated.
[0058]
In the reference embodiment , the pin 32 and the rotation shaft 38 of the rotary motor 37 are directly connected. However, the present invention is not limited to this and may be connected via a gear (not shown). According to this, the rotational torque required for the rotary motor 37 can be reduced, and further downsizing can be achieved.
[0059]
The excavated earth and sand that has flowed into the box 33 flows from the rear end opening to the rear space 34 of the cutter frame 4 and is discharged to the rear of the excavator by a soil discharging means such as a screw conveyor (not shown). The In addition, in order to improve soil removal efficiency, you may form the bottom face 40 of the box 33 in the taper shape extended toward back.
[0060]
Pin 3 2 directions and different combinations of actuator 3 6 of this preferred embodiment may be appropriately changed depending on the applied the shield machine type and installation space.
[0061]
【The invention's effect】
In short, according to the present invention, an excellent effect that the length in the radial direction of the copy cutter apparatus can be significantly reduced is exhibited.
[Brief description of the drawings]
FIG. 1A is a plan view and FIG. 1B is a front view showing a first preferred embodiment of a copy cutter apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a first preferred embodiment of a copy cutter device according to the present invention.
FIG. 3 is a front view showing a state when the copy cutter main body is housed in the first preferred embodiment of the copy cutter device according to the present invention.
FIG. 4 is a partially broken front view showing a first preferred embodiment of the shield machine according to the present invention.
FIG. 5 is a cross-sectional view showing a first preferred embodiment of the shield machine according to the present invention.
6A is a plan view and FIG. 6B is a front view showing a second preferred embodiment of a copy cutter apparatus according to the present invention.
FIG. 7 is a cross-sectional view showing a second preferred embodiment of a copy cutter device according to the present invention.
FIG. 8 is a front view showing a state when the copy cutter main body is housed in the second preferred embodiment of the copy cutter device according to the present invention.
[9] showed reference embodiment of the co Pikatta device (a) is a plan view, (b) is a front view.
[10] co Pikatta sectional view (a) of the reference embodiment shown the time of copying cutter body projecting apparatus, a sectional view showing the time (b) copy cutter body housing.
FIG. 11 is a cross-sectional view showing a conventional copy cutter apparatus.
[Explanation of symbols]
1 Parent-child shield machine
2 Large diameter shield
3 Small diameter shield 4 Cutter frame
4b Peripheral face plate 8 Copy cutter device 9 Pin 11 Copy cutter body 12 Actuator
14 opening 15 excavator body
16 bracket 18 crank arm 19 (hydraulic) jack 24 copies cutter device 25 actuator 26 (hydraulic) jack key

Claims (2)

In a parent-child shield machine equipped with a large-diameter shield and a small-diameter shield housed inside and separably connected, an opening for allowing the copy cutter body to appear in and out of the outer peripheral surface plate on the outer periphery of the cutter of the large-diameter shield A copy cutter main body is rotatably provided on the inner surface of the outer peripheral face plate near the opening via a bracket so that the copy cutter main body protrudes and disappears from the opening when the copy cutter main body is rotated. A parent-child shield machine characterized in that a crank arm is provided in a cutter body, and a hydraulic jack is provided between the crank arm and the outer peripheral plate . The parent-child shield machine according to claim 1, wherein two hydraulic jacks are provided between the crank arm and the outer peripheral plate, and the hydraulic jacks are provided so as to extend away from the crank arm .

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