JP4968925B2 - Rectangular machine - Google Patents

Description

  The present invention relates to a rectangular excavator that constructs a rectangular pipe in the ground by propelling a subsequent rectangular pipe while excavating the ground into a rectangular cross section.

  In urban areas, when underground spaces and tunnels are constructed directly under existing underground structures and pipelines, the underground space such as underground walkways has a rectangular structure superior to a circular shape in order to secure the necessary internal cross section. However, the right angle of the propulsion (rolling) that occurs during excavation is not a problem with a circular shape, but when the completed shape is inclined with a rectangular shape, there is a problem in the quality of the completed work. For that purpose, it is necessary to install a rolling correction device inside the excavator or in the box leading part.

  As a known technique of the rolling correction device, using an overhanging device (gripper jack) using a hydraulic jack, or a resistance force on one side of the plane (a device that pushes out a protrusion or makes it easy to ride on a sled on one side) A device to maintain the horizontal accuracy is made. These techniques mainly focus on a method of correcting the box concrete that follows following the excavator using various protrusions after excavation.

  When propelling a rectangular box such as a box culvert, ensuring accuracy in the propulsion direction is an important management item, but it is also a very important issue regarding horizontal accuracy during excavation. There are various rolling correction devices to ensure the accuracy, but when the ground is soft, the extruded protrusions are buried in the ground, and it is often difficult to obtain the ground reaction force. Therefore, it is necessary to take measures to install a large support plate in the rear part of the excavator or in the leading box.

However, the load of the device corresponding to the rolling correction is not clear, and if the support plate is excessively acted, there is a risk of rolling in the opposite direction. That is, when the ground strength is large or weak, or when the constituent particles are gravel or silt clay, the pressure and extrusion dimensions to push out the support plate depending on the ground configuration state have been made based on experience, The focus is on the results. In order to exclude such an empirical element, it is effective to perform excavation while keeping the level from the excavation stage as a method for preventing rolling to a minimum.
JP 2004-238916 A JP 2006-152745 A

  The problem to be solved by the present invention is to solve these conventional problems, and not to correct the rolling in the excavator or the rear box after excavation as in the prior art, but to fix the cutter and its drive part to the outer shell. The object is to provide a rectangular excavator that can be rotated independently of each other so that rolling can be corrected in the excavation stage.

The configuration of the present invention that solves this problem is as follows.
1) In a rectangular excavator composed of an outer shell with a rectangular cross section and a plurality of cutters that excavate the ground to a rectangular cross section that is slightly larger than the outer shell while rotating and revolving, a circular shape that rotates and revolves around each cutter. driver fixed mosquitoes Potter revolution centered around a rotatably supported by the soil discharge screw conveyor and integral of a jack that can stretch inward inside left and right positions of the outer shell is provided, telescopic portions of the left and right jack tip in contact with the part of the driver of, to be able to rotate in the circumferential direction relative to the outer shell driver by causing relative stretching the left and right jack, rolling drilling caused by the drilling stage characterized in that the set to be modified to a horizontal drilling, mounting a rolling sensor for detecting the inclination of the rectangular shield machine 2) drive unit to the drive unit, the a driving unit rolling sensor detects the rolling of the drive unit The rectangular excavator described in 1) above, which is provided with control means for controlling the left and right jacks so as to eliminate rolling by rotating in the direction opposite to the ring, and the drive part has a revolution on its outer peripheral surface with teeth. A drive unit body that is pivotally supported by a gear, a gear that is provided at the rear portion of each cutter and meshed with the teeth of the drive unit body, an internal gear that pivotally supports the shaft end of the gear of each cutter, an internal gear and a tooth In combination with the electric motor that rotates the outer periphery of the drive unit main body, the rectangular engraving machine according to 1) or 2) is provided.

  In the present invention, when the rectangular excavator rolls, the left and right jacks are relatively expanded and contracted so as to rotate the drive unit in the opposite direction to the rolling direction. Each cutter digs into a rectangular cross section at the corrected position after rotation, and gradually returns to the pre-rolling posture while the outer shell and the subsequent rectangular tube are embedded in the drilled hole excavated at the corrected position. Thereafter, the left and right jacks are returned to the neutral position, and the drive unit is returned to the position before rolling to complete the correction of rolling.

  In this way, the rolling correction can be made directly according to the ground condition at the excavation stage without correcting the rolling in the excavator or the rear box after excavation, so that the rolling can be minimized as compared with the conventional case. be able to.

  In the present invention, a rolling sensor for detecting the inclination of the drive unit, and a control means for controlling the left and right jacks so as to rotate the drive unit in a direction opposite to the detected rolling are provided, and the ground during excavation is corrected. It can be automatically performed according to the state of. A hydraulic type or a mechanical type is used as the jack. Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is an explanatory diagram of a rectangular excavator according to the embodiment, FIG. 2 is a front view of the rectangular excavator according to the embodiment, FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 5 and FIG. 6 are explanatory views showing rolling correction of the embodiment.

  In the figure, 10 is a rectangular excavator, 11 is an outer shell, 12 is a cutter, 13 is a drive unit, 13a is a drive unit body, 13b is a tooth, 13c is a gear, 13d is a planetary gear, 13e is an internal gear, 13f is Electric motor, 13g is a protrusion, 14 is an earth discharging screw conveyor, 14a is an electric motor, 15 is a direction correcting jack, 16 is a rolling correcting ram jack, 16a is a telescopic rod, 17 is a stroke sensor, 18 is a rolling sensor, 19 is a rectangular tube, G is an excavation line, Ga is an excavation correction portion, and Gb is an excavation unnecessary portion.

  As shown in FIGS. 1 to 3, the rectangular excavator 10 according to the present embodiment includes an outer shell 11 having a rectangular cross section and three cutters 12 that excavate the ground to a rectangular cross section slightly larger than the outer shell 11 while rotating and revolving. Has been. A drive unit 13 that pivotally drives each cutter 12 is disposed in a state of being separated from the outer shell 11, and a soil removal screw conveyor 14 is integrally provided at the center position of the drive unit 13. Is supported in the outer shell 11 at the revolution position of the cutter 12.

  The drive unit 13 has a circular shape as a whole, and has teeth 13b on the outer peripheral surface and a drive unit body 13a integrated with the earthing screw conveyor 14, and gears meshed with the teeth 13b of the drive unit body 13a provided at the rear of each cutter 12. 13c, planetary gear 13d, internal gear 13e that pivotally supports the shaft end of gear 13c and planetary gear 13d, and six electric motors 13f that mesh with internal gear 13e to rotate the outer periphery of drive unit main body 13a. It consists of and.

  A protrusion 13g is formed at the lower back of the drive unit 13, and a rolling correction ram jack 16 is attached to the left and right positions inside the outer shell 11 in such a direction that the telescopic rod 16a can be expanded and contracted inward, and the tip of each telescopic rod 16a is attached. By abutting the left and right surfaces of the protrusion 13g and relatively expanding and contracting the left and right telescopic rods 16a and pressing the protrusion 13g, the drive unit 13 is circumferential with respect to the outer shell 11 with the earth discharging screw conveyor 14 as an axis. It can be rotated to.

  The rolling correction ramjack 16 is provided with a stroke sensor 17 for detecting the amount of expansion / contraction of the telescopic rod 16a, and a rolling sensor 18 for detecting the rolling of the rectangular engraving machine 10 is provided on the back of the drive unit 13, and the rolling sensor 18 is a rectangular engraving machine. When 10 rolling is detected, a controller (not shown) controls the left and right rolling correction ram jacks 16 so that the drive unit 13 rotates the same amount of rolling in the direction opposite to rolling.

  In this embodiment, a rectangular tube 19 is connected to the rear end of the rectangular excavator 10 and pressed from behind, and each cutter 12 rotates and revolves as shown in FIG. 4 to excavate the ground into a rectangular cross section. The pipe 19 is propelled from behind, and a rectangular pipe is constructed in the ground. FIG. 5A shows a normal excavation state.

  Here, as shown in FIG. 5B, when the rectangular excavator 10 rolls clockwise by the reaction force caused by the revolution of the cutter 12, the left rolling correction ram jack 16 is extended as shown in FIG. 5C. At the same time, the right rolling correction ram jack 16 is retracted, and the drive unit 13 is rotated in the direction opposite to the rolling direction to rotate the same rolling amount to correct the position before rolling. Each cutter 12 excavates into a rectangular cross section at the corrected position after rotation (excavation correction portion Ga), and gradually rolls while the outer shell 11 and the subsequent rectangular pipe 19 are embedded in the drilled hole excavated at the corrected position. Return to previous posture.

  Thereafter, as shown in FIG. 6A, the drive unit 13 excavates the outer shell 11 that has returned to the pre-rolling posture in a counterclockwise position (excavation unnecessary portion Gb). 6 (b), the left and right rolling correction ram jacks 16 are returned to the neutral position to return the drive unit 13 to the position before the rolling, and the rolling correction is completed as shown in FIG. 6 (c). Let Thus, when rolling occurs, the drive unit 13 is directly rotated by the right and left rolling correction ram jacks 16 to perform rolling correction according to the state of the ground at the excavation stage. Rolling can be minimized.

  The rectangular excavator of the present invention is useful for an application for constructing an underground space or a tunnel directly under an existing underground structure or pipeline.

It is explanatory drawing of the rectangular excavation machine of an Example. It is a front view of the rectangular machine of an Example. It is AA sectional drawing of FIG. It is explanatory drawing which shows the rotation locus | trajectory of the cutter of an Example. It is explanatory drawing which shows correction of rolling of an Example. It is explanatory drawing which shows correction of rolling of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rectangular machine 11 Outer shell 12 Cutter 13 Drive part 13a Drive part main body 13b Teeth 13c Gear 13d Planetary gear 13e Internal gear 13f Electric motor 13g Protrusion 14 Earthing screw conveyor 14a Electric motor 15 Direction correction jack 16 Rolling correction ram jack 16a Telescopic rod 17 Stroke sensor 18 Rolling sensor 19 Rectangular pipe G Drilling line Ga Drilling correction required part Gb Drilling unnecessary part

Claims (3)

In a rectangular excavator composed of a rectangular cross-section outer shell and a plurality of cutters that excavate the ground into a rectangular cross section that is slightly larger than the outer shell while rotating and revolving, a circular drive unit that rotates and revolves around each cutter. mosquitoes fixed revolves around the center to rotatably supported by the soil discharge screw conveyor and integral of Potter, the jack can stretch inward inside left and right positions of the outer shell is provided, the tip of the telescopic portions of the left and right jack Is in contact with a part of the drive unit, and the left and right jacks are relatively expanded and contracted so that the drive unit can rotate in the circumferential direction with respect to the outer shell, and the rolling of the drilling holes generated during the excavation stage is horizontal. A rectangular excavator , which can be modified to excavate.   A rolling sensor that detects the tilt of the drive unit is attached to the drive unit. When the rolling sensor detects the rolling of the drive unit, the left and right jacks are controlled so as to eliminate the rolling by rotating the drive unit in the opposite direction to the rolling. The rectangular excavator according to claim 1, further comprising a control unit. The drive unit has a tooth on the outer peripheral surface and is pivotally supported at the revolving position, a gear that is provided at the rear of each cutter and meshed with the teeth of the drive unit main body, and a shaft end of each cutter gear. The rectangular engraving machine according to claim 1 or 2, comprising a supporting internal gear and an electric motor that meshes with the internal gear and rotates the outer periphery of the drive unit main body.

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