JP3766718B2 - Parent-child shield machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parent-child shield machine capable of continuously excavating large and small holes having different diameters.
[0002]
[Prior art]
In general, the eccentric-parent-child shield machine is suitable for tunnel excavation of the top or bottom of a sewer pipe, for example, which continuously shifts large and small holes of different diameters, especially the axis of each other. That is, it can be excavated eccentrically.
[0003]
FIG. 9 shows a conventional parent-child shield machine corresponding to eccentricity, in which a child machine b is combined with a parent machine a, and these cooperate to excavate a hole with a large cross section. The slave unit b includes a small-diameter slave unit cutter c, and the master unit a includes an outer peripheral cutter d that surrounds the outer peripheral side of the slave unit cutter c. The cutters c and d are connected by a connection jack e, The drive shaft f is rotationally driven. Here, the drive shaft f can be slid to an eccentric position from the parent machine center c _{0 to the} child machine center c ₁ , and the connection position to the child machine cutter c can be changed. The eccentric movement is performed by the first and second moving jacks g and h pulling up the drive shaft f together with the drive unit i. If the drive shaft f is moved to the child machine center c ₁ in this way, the eccentric machine with a small cross section can be excavated by moving the child machine b away from the parent machine a and moving it forward.
[0004]
[Problems to be solved by the invention]
However, in such a conventional parent-child shield machine, a slide mechanism j for changing the connection position of the drive shaft f is provided on the back surface of the child machine cutter c. There was a problem that the space on the back side of the cutter was reduced or the gap between the cutter porks was closed, which worsened the intake of earth and sand.
[0005]
In addition, since the drive unit i, the bearing case k, the slide frame 1 and the like slide together with the drive shaft f on the inside of the machine, they interfere with peripheral devices and structures when a large amount of eccentricity is desired. There was a problem.
[0006]
After all, for these reasons, the conventional parent-child shield machine cannot take a large amount of eccentricity, and due to this, the hole cross-sectional area ratio cannot be made large.
[0007]
[Means for Solving the Problems]
In the parent-child shield machine according to the present invention, a rotating structure is rotatably provided in the parent machine so as to be eccentric from the center of the parent machine, and the child machine can be detached from the rotating structure positioned at the center of the parent machine. A parent-child shield machine that rotates the rotating structure to rotate the child machine eccentrically with respect to the center of the parent machine. The outer cutter is disposed, and a guide member is provided on the outer cutter for sliding the cutter of the slave unit to the outside in the radial direction of the master unit when the slave unit rotates eccentrically .
[0008]
According to this, since the slave unit is moved to the eccentric position by the eccentric rotation, the slide mechanism as described above can be eliminated, and a large amount of eccentricity can be obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0010]
1 is a front view showing a parent-child shield machine according to the present invention, FIG. 2 is a longitudinal side view thereof, and FIG. 3 is a rear view thereof. As shown in the figure, the parent-child shield machine 1 is configured by combining a parent machine 2 with a child machine 3 so as to be detachable. The master unit 2 has a cylindrical master unit shield frame 4, and the slave unit 3 also has a cylindrical slave unit shield frame 5. The slave unit shield frame 5 has a smaller diameter than the master unit shield frame 4 and is disposed concentrically within the master unit shield frame 4.
[0011]
The slave unit shield frame 5 is detachably held by the drum member 6, and the drum member 6 (rotary structure) is rotatably supported by the master unit shield frame 4. The center C _{1 of the} drum member 6 is eccentric upward by a predetermined distance z with respect to the center C _{0 of the} parent device 2 or the child device 3. The drum member 6 has a cylindrical portion 7 integrally at the position of the center C ₀ , and the slave unit shield frame 5 is fitted into the cylindrical portion 7 so as to be freely inserted and removed along the axial direction. The drum member 6 is supported from below by a lower frame 8 of the base shield frame 4 via a plurality of rollers 9 and can rotate around its center C ₁ . The drum member 6 is supported by the thrust bearing 10 in the grid-like rear frame 11 of the parent shield frame 4 in the axial direction or the thrust direction.
[0012]
In particular, as shown in FIG. 3, the slave unit shield frame 5 is provided with a plurality of slave unit shield jacks 12 arranged in the circumferential direction, and the slave unit shield jack 12 is attached with a block 13 having an annular shape as a whole. Yes. Then, the rear end surfaces of the block 13 and the drum member 6 are connected by a plurality of connecting members 14, whereby the slave unit shield frame 5 and the drum member 6 are fixed integrally. Note that the connecting member 14 needs to be removed when the slave unit 3 is detached later. Therefore, as a fixing method, bolting, welding (fusing and removing), or the like can be considered.
[0013]
A drive shaft 15 is rotatably attached to the slave unit shield frame 5 at the center C ₀ position. A slave unit cutter 16 is integrally attached to the front end of the drive shaft 15. The handset cutter 16 has a handset cutter spoke 17 that extends in a cross shape from the drive shaft 15 at intervals of 90 ° in the circumferential direction, and a plurality of cutter bits 18 are arranged in a row. The outer peripheral ends of the slave unit cutter pork 17 are connected to each other by a slave unit outer peripheral ring 19.
[0014]
On the other hand, an outer cutter 20 as a parent machine cutter is disposed on the outer peripheral side of the child machine cutter 16. The outer cutter 20 includes an outer cutter spoke 21 arranged in an X-shape and a plurality of cutter bits 22 arranged in the outer cutter pork 21, and the outer peripheral ends of the outer cutter pork 21 are the outer periphery of the master unit. They are connected by a ring 23. On the other hand, the inner peripheral end of the outer cutter spoke 21 is integrally coupled to a guide member 24 formed in a lateral U shape. In addition, the main | base station outer periphery ring 23 and the guide member 24 are connected also by the auxiliary | assistant spoke 25 extended horizontally.
[0015]
The guide member 24 is centered a semicircular portion 26 that extends in an arc shape in the vertical A C ₀ on the left side of FIG. 1, extending to the right side of FIG. 1 from the upper and lower ends of the semicircular portion 26, the master unit A pair of linear portions 27 connected to the outer peripheral ring 23; And the semicircle part 26 is fitted to the subunit | mobile_unit outer periphery ring 19 from the outer side, and is fixed with the following method.
[0016]
As shown in FIG. 4, first, a first jack 28 is provided on the back surface of the upper and lower handset cutter spokes 17 (only the lower side is shown). In the first jack 28, the tip end portion of the rod 29 is fixed to the slave unit cutter pork 17, and the cylinder body 30 is slidably supported by the slave unit cutter spoke 17. Further, the first jack 28 is extended, and the cylinder body 30 is inserted into the first hole 31 of the guide member 24. By this insertion or engagement, the outer cutter 20 is supported by the slave machine cutter 16 at the upper and lower positions.
[0017]
Next, as shown in FIG. 5, the second jack 32 is also provided on the back surface of the handset cutter spoke 17 on the left side of FIG. 1. Similarly, the tip of the rod 33 is fixed to the child machine cutspoke 17, and the cylinder body 34 is slidably supported by the child machine cutspoke 17. Further, the second jack 32 has the end portion of the cylinder main body 34 taper-fitted into the second hole 35 of the guide member 24 in a state of slightly extending from the most contracted position. By this fitting or engagement, the outer cutter 20 is supported by the slave machine cutter 16 at the position on the left side of FIG.
[0018]
In this way, the outer cutter 20 is fixed to the child machine cutter 16 by three-point support. As shown in FIG. 4, an engaging groove 36 that is continuous with the first hole 31 is formed in the linear portion 27 of the guide member 24 over the entire length. The role of this will be described later.
[0019]
By the way, the front face portions of the slave unit shield frame 5, the drum member 6, and the master unit shield frame 4 are closed by the slave unit partition wall 37, the drum partition wall 38, and the master unit partition wall 39, respectively. The excavated earth and sand taken forward is sent backward by the screw conveyor 40. That is, the shield machine 1 is an earth pressure type. Moreover, although the subunit | mobile_unit screw conveyor 41 is attached also to the subunit | mobile_unit partition 37, this is not used at the time of excavation by the parent-child shield machine 1, but is used only at the time of excavation only by the subunit | mobile_unit 3.
[0020]
A ring gear 42 is fixed to the drive shaft 15 on the back surface side of the slave unit partition wall 37, and a pinion gear 44 attached to the rotation shaft of the drive hydraulic motor 43 is engaged with the ring gear 42. As a result, the hydraulic motor 43 drives both the outer cutter 20 and the slave unit cutter 16 when excavating with the parent-child shield machine 1, and drives only the slave unit cutter 16 when excavating with only the slave unit 3. It will be.
[0021]
An arc-shaped rack 45 is fixed to the drum member 6 along its outer periphery, and a pinion gear 47 attached to the rotation shaft of the eccentric rotation hydraulic motor 46 is engaged with the drum member 6. The hydraulic motor 46 is fixed to a motor mount frame 48 fixed on the inner surface of the parent machine shield frame 4. Accordingly, when the hydraulic motor 46 is rotated, the drum member 6 rotates about the center C ₁ , and the slave unit 3 rotates eccentrically about the center C ₁ .
[0022]
FIG. 6 is an enlarged view showing an upper end portion of the slave unit shield frame 5. Although omitted in FIG. 2, the slave unit shield frame 5 has a slide frame 49 slidable in the axial direction on the outer peripheral side thereof, which is pushed by the slide jack 50 and protrudes forward from the slave unit partition wall 37. Can do. A plurality of slide jacks 50 are provided in the circumferential direction by connecting the slide frame 49 and the rear end wall 6 a of the drum member 6. The slide frame 49 is housed during excavation by the parent-child shield machine 1 and protrudes during excavation by the child machine 3 to define a space for taking in earth and sand. Note that at a position where the slide jack 50 is located, the cylindrical portion 7 of the drum member 6 is partially cut away.
[0023]
An entrance seal 51 is provided on each of the child machine shield frame 5 and the drum member 6, and these seals 51 slidably hold a slide frame 49 to seal a gap between them. The rear end of the drum member 6 is closed by the rear end wall 6a, but the rear end of the child machine shield frame 5 is open. This drum member 6 is formed in a box-like sealed except for the cylindrical portion 7, the manhole provided in the drum partition wall 38 and the rear end wall 6a, it is optional to take into the interior. Further, here, the slave unit shield frame 5 can be folded, that is, the slave unit shield frame 5 is divided into front and rear, and these divided frames are brought into contact with each other at the sliding portion 52 and the spherical surface portion 53, and a plurality of unillustrated pluralities are shown. It is connected with a bent jack.
[0024]
Further, FIG. 7 is an enlarged view showing a lower end portion of the slave unit shield frame 5. Here, two entrance seals 51 on the drum member 6 side are disposed in the axial direction to improve the sealing performance. Further, the lower surface portion of the drum member 6 and the lower frame 8 are also sealed by an entrance seal 54 disposed on the lower frame 8.
[0025]
Further, as shown in FIG. 2, the base unit shield frame 4 can be folded in the same manner. The front and rear divided frames are connected by a plurality of center-turn jacks 55 arranged in the circumferential direction. Reference numeral 56 denotes a main unit shield jack, which hits the existing segment 57 and takes a reaction force during excavation. Similarly, the slave unit shield jack 12 also takes a reaction force from the existing segment when excavating with only the slave unit 3. Reference numeral 57 denotes a rear equipment mount extending rearward from the rear frame 11, and 58 denotes an annular frame of the erector.
[0026]
Next, the effect | action by the said structure is demonstrated.
[0027]
When drilling a hole in the large section with parents shield machine 1, while promoting the parent machine shield jacks 56, and the rotary drive at the center C ₀ around the outer peripheral cutter 20 and sub-terminal cutter 16 by driving the hydraulic motor 43, the excavation Do. At this time, the eccentric rotation hydraulic motor 46 is braked to stop the rotation of the drum member 6. And when this excavation is complete | finished and it transfers to excavation of the hole of a small cross section in an eccentric position, the subunit | mobile_unit 3 moves eccentrically and isolate | separates in the following procedures.
[0028]
First, when moving, referring to FIG. 4, the first jack 28 is slightly stored, and the protruding amount of the cylinder body 30 is made to coincide with the depth of the engaging groove 36. As a result, the cylinder body 30 can slide or slide along the engagement groove 36, and the handset cutter 16 can be guided to the linear portion 27 of the guide member 24 and moved radially outward.
[0029]
Thereafter, as shown in FIG. 8, the drum member 6 is rotated in the direction indicated by the arrow by the hydraulic motor 46. In this way, the entire handset 3 can be rotated 180 ° upward and eccentrically about the center C ₁ . In FIG. 8, (a) is the state before eccentric rotation, (b), (c), and (d) are the states when the drum member 6 is rotated by 30 °, 90 °, and 180 °, respectively. Indicates.
[0030]
At this time, the previous cylinder main body 30 slides on the engaging groove 36, and the slave unit outer peripheral ring 19 slides on the linear portions 27 while being sandwiched between the pair of linear portions 27 of the guide member 24. This sliding, the outer cutter 20 will be rotated around C ₀ around in the same direction. Here, the outer cutter 20 is supported from the outer peripheral side by the inner peripheral surface of the already drilled large-diameter hole, and is engaged with the engagement groove 36 of the first jack 28 and the second hole 35 of the second jack 32. Is supported in the axial direction. Further, the second jack 32 is extended in accordance with the eccentric rotation, whereby the handset cutter 16 can be pushed, and the movement outward in the radial direction can be promoted or assisted.
[0031]
In particular, the drum member 6 and handset 3 rotate 180 ° around the center C ₁ , whereas the outer cutter 20 rotates only 90 ° around the center C ₀ . Therefore, here, in the case of the eccentric rotation, the slave unit 3 is operated in the reverse direction at a rotational speed 1/2 that of the outer cutter 20, that is, the slave unit cutter 16 is driven in the reverse rotational direction at that speed by the drive hydraulic motor 43. Like to do. By doing so, there is no rotational sliding (sliding) of the child machine cutter 16 with respect to the guide member 24, and the relative position of each other does not change in the rotational direction. Therefore, the engagement by the first jack 28 described above is always possible, the axial cutter 20 can be reliably held in the axial direction, and the second jack 32 can be pushed out, thereby effectively moving the slave unit 3. Can assist. Furthermore, the resistance at the time of sliding can be reduced greatly, and the smooth movement of the subunit | mobile_unit 3 can be achieved.
[0032]
Thus, when the eccentric rotation is completed, the slave unit 3 is moved upward from the cutter center C ₀ by the eccentric amount 2z. Thereafter, if the first and second jacks 28 and 32 are contracted to disengage from the outer cutter 20, the slide frame 49 is extended, and the rear child unit shield jack 12 is extended, the sub unit 3 Can be moved forward. The propulsion reaction force at this time is received by the rear frame 11 via the connecting member 14, the drum member 6, and the thrust bearing 10. Then, after a certain amount of advance, the connecting member 14 may be removed and a reaction force may be applied to the existing segment.
[0033]
Thus, in such a configuration, the drum member 6, the arc-shaped rack 45, the eccentric rotation hydraulic motor 46, and the pinion gear 47 constitute an eccentric rotation means for eccentrically rotating the slave unit 3.
[0034]
In addition, the drum member 6 forms a rotating structure that is rotatably supported at an eccentric position of the parent device 2 and holds the child device 3 at the center position of the parent device 2 in a detachable manner. The rotating structure is not limited to the drum member 6 but may be an annular frame.
[0035]
As described above, since the handset 3 is eccentrically rotated and moved, the conventional slide mechanism becomes unnecessary, and the amount of eccentricity of the handset 3 can be extended, and the amount of eccentricity between the large and small holes can be increased. . Moreover, the cross-sectional area ratio of the holes can be increased, and the cross-sectional change can be increased.
[0036]
In particular, it is not necessary to provide the first and second movable jacks g and h (see FIG. 9) on the eccentric side (upward) as in the prior art, so that they can be decentered by their lengths, increasing the amount of eccentricity. Is possible. Further, since the handset 3 is moved while the drive shaft 15 is fixed to the center of the handset cutter 16, for example, an eccentric amount larger than the outer diameter of the handset cutter 16 can be taken. Can be reduced in diameter, and thereby the cross-sectional area ratio of the holes can be increased.
[0037]
Moreover, since it is not necessary to equip the back surface part of the cutters 16 and 20 with the conventional slide mechanism, the space on the back surface part can be sufficiently taken, and further, the earth and sand intake port between the cutter porks 17 and 21 is closed. Since there is no such thing, soil and sand can be taken in smoothly.
[0038]
Further, the slave unit 3 can be stopped at an arbitrary position around the drum center C _{1, and} there is also an advantage that the selection range of the excavation position of the small diameter hole can be expanded.
[0039]
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various other forms can be adopted.
[0040]
【The invention's effect】
The present invention exhibits the following excellent effects.
[0041]
(1) A conventional slide mechanism is not required, and the amount of eccentricity can be increased.
[0042]
(2) It becomes possible to increase the cross-sectional area ratio and cross-sectional change of the holes.
[Brief description of the drawings]
FIG. 1 is a front view showing a parent-child shield machine according to the present invention.
FIG. 2 is a longitudinal side view showing a parent-child shield machine according to the present invention.
FIG. 3 is a rear view showing the parent-child shield machine according to the present invention.
FIG. 4 is a front view showing a method of engaging a slave machine cutter with an outer cutter.
FIG. 5 is a front view showing a method of engaging the handset cutter and the outer cutter.
FIG. 6 is an enlarged longitudinal sectional side view showing an upper end portion of the slave unit shield frame.
FIG. 7 is an enlarged longitudinal sectional side view showing a lower end portion of the slave unit shield frame.
FIG. 8 is a front view showing a state of eccentric rotation of the slave unit.
FIG. 9 is a longitudinal side view showing a conventional parent-child shield machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Parent-child shield machine 2 Parent machine 3 Child machine 6 Drum member 24 Guide member 45 Arc-shaped rack 46 Eccentric rotation hydraulic motor 47 Pinion gear

Claims (4)

A rotating structure is provided in the parent machine so as to be decentered from the center of the parent machine so that the rotating structure can be rotated. The rotating structure is positioned at the center of the parent machine so as to be detachably held. A parent-child shield machine that rotates the child machine eccentrically with respect to the center of the parent machine by rotating,
An outer peripheral cutter for the master unit is arranged on the outer peripheral side of the cutter of the slave unit, and the cutter of the slave unit is slid to the outer peripheral cutter when the slave unit is eccentrically rotated. A parent-child shield machine provided with a guide member for guiding . 2. The parent-child shield machine according to claim 1 , wherein when the rotary structure is rotated, the cutter of the slave unit is rotationally driven in a reverse direction at a rotational speed that is ½ of the rotary structure . The guide member has a pair of linear portions arranged so as to sandwich the diameter portion of the cutter of the slave unit, and an engagement groove formed in the linear portion along the longitudinal direction thereof,
The parent-child shield machine according to claim 2, wherein a first jack that engages and disengages with the engagement groove is provided on a cutter of the child machine. The guide member has a semicircular portion formed along the outer periphery of the cutter of the slave unit,
The parent-child shield machine according to claim 2 or 3, wherein a second jack that engages with and disengages from the semicircular portion is provided on a cutter of the child machine.

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