JP2539036B2 - Multi Phase Shield Excavator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a multi-face shield excavator having a feature in direction control by inclining a cut face ace for excavating a face of a tunnel.

(Prior Art) A conventional example of a shield excavator (tunnel excavator),
Explaining with reference to FIG. 8, as shown in FIG. 7, a cutter ace (with a bit, including a spoke) protruding from a shield main body (a) having a circular cross section by a cutter rotating shaft (not shown) ( An ordinary single-swivel type shield excavator equipped with b), a plurality of cutter swivel shafts (not shown) in the front part of the shield body (a ₁ ) having a non-circular cross section as shown in FIG. Double swivel axis type in which the cutter faces (b ₁ ) (b ₂ ) are fixed to the tip of each swivel axis of the cutter in a front-to-back direction. That is, there is a multi-phase shield excavator, and in each case, the thrust of the airframe is obtained by the propulsion jack group (not shown) arranged in the rear part of the shield body (a, a ₁ ), and the cut force (b, b ₁ , b) is obtained. drilling working face by rotation of _2), the excavation soil The earth excavator (not shown) discharges to the rear of the fuselage for excavation (segments are installed on the rear side of the fuselage). In response to the force, a cutter turning reaction force is generated on the shield body (a) side, and the direction control for moving the shield body (a) in the rolling direction is performed by the cutting tool turning reaction force. When (b ₁ ) and (b ₂ ) are rotated in the same direction, a rotating reaction force is generated on the shield body (a) side, causing a rolling force, but the shield body (a ₁ ) has a non-circular cross section. A large amount of force is required for rolling, and the rolling force is insufficient for the turning reaction force of the ivy.

(Problem to be Solved by the Invention) In the conventional multi-face shield excavator, since the shield body has a plurality of cutaways and the shield body has a non-circular cross section, it is obtained by rotating each cutaway in the same direction. It is difficult to control the direction only with the turn force of the cutter, and if there is a large deviation especially in the rolling direction, it becomes impossible to assemble the segment that is the lining material. It is a force that acts in the rolling direction, and it becomes uncontrollable especially on loose ground, and direction control is a major problem.

The present invention was developed in order to address the above-mentioned problems, and the object thereof is to incline a plurality of cutaways arranged at the front part of the excavator body individually. , To provide a multi-faced shield excavator with a variety of powerful direction control forces to improve the direction control performance and improve workability and excavation efficiency.

(Means for Solving the Problem) The present invention is directed to a front portion of an excavator main body in which a plurality of cutter turning shafts are oriented in the machine front-rear direction and project at intervals of a lateral direction, and In a multi-faced shield excavator in which a cutter face is fixed to each of the tip portions in a first and second arrangement, the cutter face is individually tilted between the excavator body and each of the cutter pivot shafts via the cutter pivot shafts. Characterized by the configuration provided with a direction control mechanism,
The directional control mechanism makes it possible to adjust the tilt of the cutter face individually and variously via each turning shaft of the cutter, and by the tilt adjustment, a powerful rolling force, pitching force or yawing force can be obtained to freely control the direction of the excavator body. You are smooth.

(Action) When the knuckle ace is individually and variously tilt-adjusted through each knuckle turning axis by the direction control mechanism, the reaction force acting on the front face of the face acts perpendicularly to the knuckle face, and at this time, the knuckle face is moved. Since it is inclined, the load acting on the cut ace face is decomposed into components in the excavating body's excavation direction and its orthogonal direction, and the load perpendicular to the excavation direction acts as a direction control force. With various combinations of directions, strong direction control force such as rolling force, pitching force, or yawing force is obtained, and the direction control is freely performed to smoothly perform excavation.

(Embodiment) One embodiment of the present invention is shown in FIGS. 1 to 6, in which (1) is a shield body, (2) is a partition wall provided in the front part of the shield body (1), 3a) and (3b) are the turning shafts of the cutters, and (5a) and (5b) are the cutter faces (including the spokes) having the bit group, and the turning shafts (3a) of the cutters (3a) are provided in front of the excavator body (1, 2). ) (3b) is oriented in the machine front-rear direction (X) and is projected at an interval in the lateral direction, and the cutter ace (5a) (5b) is first attached to the tip of each cutter rotation shaft (3a) (3b). , In the multi-face shield excavator fixed in the following arrangement, the excavator body (1,2)
It is a multi-face shield excavator equipped with a direction control mechanism (4a, b, 6) for individually inclining the cutter face via the cutter pivot shaft between each and the cutter pivot shafts (3a) (3b). .

The direction control mechanism (4a, b, 6) includes a spherical bearing (4a) (4b), which is arranged on the partition wall (2) and supports the cutter rotating shafts (3a) (3b) so as to be tiltable in multiple directions. , A swinging jack (6) (6) pivotally connected between the partition wall (2) and the cutter swivel shafts (3a) (3b), etc., for swinging by an appropriate fluid circuit (not shown) The jacks (6) (6) can be individually expanded and contracted and fixed, and the knuckle ace (5a) can be tilted via the knuckle swivel axis (3a), or the knuckle ace (5b) can be tilted through the knuckle swivel axis (3b). It facilitates direction control.

In the multi-face shield excavator, the rotation drive motors (7a) (7b) and the cutter rotation shafts (3a) (3b) arranged on the shield body (1) by appropriate means are provided on the base end side. Connected power transmission mechanisms (8a) and (8b) are provided, and the power transmission mechanisms (8a) and (8b) allow tilting of the cutter turning shafts (3a) and (3b) by appropriate means for turning drive. The power of the motors (7a) (7b) is transmitted to the rotary shafts (3a) (3b) of the cutter. In the figure, (9) is a plurality of jacks for propulsion arranged in the rear part of the excavator body (1), and (10) is the excavator body (1).
An erector device (11) arranged in the rear side of the excavator body (1) for gripping and arranging the segment block is a segment assembled and installed in the rear part of the excavator body (1).

The embodiment of the present invention is configured as described above, and the operation will be described in detail. When the jack (9) group for propulsion is applied to the front portion of the assembled segment (11), the reaction force of the aircraft causes A thrust drive motor for turning drive (7a)
By the power transmission mechanism (8a) (8b) and the cutter rotating shafts (3a) (3b), the cutter ace (5a) (5b) is individually rotated in the forward and reverse directions by the (7b), and the keeper ace (5a) (5b) is rotated. While the cutting face is excavated by rotation, the excavated earth and sand is discharged to the rear of the machine by an appropriate earth removal mechanism (not shown) and advanced, and the segment block is arranged by the erector device (10) on the rear side of the machine after excavation, Assembly and construction of segments is performed.

In the shield excavation, as shown in FIG. 2, when the cutter pivots (3a) and (3b) are tilted in opposite directions and the cutter ace (5a) and (5b) are tilted in the opposite direction, as shown in FIG. As shown in (A), the face load F perpendicular to the face surface acting on the cutter face (5a) is decomposed into a propulsion reaction force Fcosθ parallel to the excavation direction X and a direction control force Fsinθ which is a component in the right direction, As shown in FIG. 3 (B), the cutaway ace (5b) is also similarly attached to the cutaway ace (5b).
A direction control force Fsinθ in the opposite direction to a) acts, and each direction control force is a downward direction control force at the center of the cutaway ace (5a) and a downward direction control force at the cutaway ace (5b) as shown in FIG. 3C. It acts as an upward direction control force (such force is generated by the wedge effect when the shield body is propelled), and acts as a strong rolling force on the shield body (1). When the cutaway ace (5a) (5b) is tilted in the opposite direction, the rolling action direction can be reversed, and the rolling force can be adjusted by adjusting the tilt angle θ of the cutaway ace.

Furthermore, by inclining the cutaway ace (5a) (5b) in the same direction as shown in FIG. 4, the cutaway ace (5a)
The direction control force generated in (5b) is both upward, and the pitching direction can be controlled.
When (5b) is tilted in the same direction as shown in FIG. 5, a yawing force is obtained.

The shield body (1) can obtain a rolling force by the reaction force of the turning of the cutters (5a) and (5b), and the rolling force of the shields (5a) and (5b). Then,
As a rolling force, a pitching force, or a yawing force, a strong direction control force can be obtained, and the shield body (1)
The rolling performance is improved to enable various excavations, and, for example, assembling and lining the segment (11) as shown in FIG. 6 is performed.

〔The invention's effect〕

The present invention is configured as described above, and in addition to the rolling force obtained by the cutter turning reaction force due to the cutter turning force of each cutter ace, the direction control mechanism allows the plurality of cutter ace to be individually and variously inclined via each of the cutter turning shafts. By adjusting, a strong direction control force is obtained as the rolling force, pitching force or yawing force of the excavator body, the direction control performance is remarkably improved, and the workability and the excavation efficiency are significantly improved.

Therefore, it is also possible to change the layout from horizontal shield excavation in which a plurality of cutaways are arranged in the horizontal direction to vertical shield excavation in which the cutaways are arranged above and below, or vice versa. It is easy and easy to perform, and the scope of multiface shield drilling is greatly expanded.

[Brief description of drawings]

1 (A) is a front view showing an embodiment of the present invention, FIG. 1 (B) is a cross-sectional view of the IB-IB portion of FIG. 1 (A), and FIG. 1 (C) is FIG. (B) is a cross-sectional view of the IC-IC portion, FIG. 2 is a side view showing the reverse inclination of both cutter ace, and FIG. 3 (A) is a side view mechanism view of the preceding cutter ace side of FIG.
FIG. 3 (B) is a side view mechanism view of the trailing cutaway ace side of FIG. 2, FIG. 3 (C) is a front view of FIG. 2, and FIG. 4 (A).
(B) is a side view mechanism diagram and a front view showing the same direction inclination of the cutaway, and FIGS. 5 (A) and (B) are plan view mechanism diagrams and a front view showing other same direction inclinations. FIG. 7 is a perspective view showing an assembled state, FIG. 7 is a perspective mechanism view showing a conventional example, and FIG.
The figure is a perspective view showing another conventional example. 1,2: Excavator body, 3a, 3b: Cutter rotation axis 5a, 5b: Cutter face 4a, b, 6: Direction control mechanism

Front page continued (72) Inventor Yoshihiro Oishi 2-1-1, Niihama, Arai-cho, Takasago-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Takasago Research Laboratory (72) Inventor Hideo Ishizaki 734-2, Hirohama-cho, Machida-shi, Tokyo (56) Reference Reference JP-A-51-96139 (JP, A) JP-A-58-213995 (JP, A)

Claims (1)

(57) [Claims] 1. A plurality of cutter turning shafts are provided in the front part of the excavator main body so as to be oriented in the machine front-rear direction and project at a lateral interval, and each cutter turning shaft is provided with a cutter face first. In a multi-face shielded excavator fixedly installed in a subsequent arrangement, a direction control mechanism for individually inclining the cutter face between the excavator body and each of the cutter rotation shafts via the cutter rotation shaft is provided. Characteristic multi-face shield excavator.