JPS63110320A - Trencher - Google Patents

Abstract

PURPOSE:To permit any diameter of cutters to be attached by regulating the interaxial distance of a cutters by means of spacers by a method in which spacers are detachably set between frames constituting a trencher. CONSTITUTION:Reverse shafts 63 are provided with up and down relation at a point where the first frame 10 of a trencher is centered, and bit shafts 82 and 83 to be turned by a drive source 70 are set on both sides of the shaft 63. A wing bit 62, a drum cuter 22, and ring cutter 26 are turned by the shafts 82 and 83. The first spacer is provided between the shaft 63 and the second frame 100, and the second spacer is provided between the frame 100 and the 3rd frame 102. The distance between the shafts can thus be regulated even when the bit 62 or the cutter 26 is replaced with one of different diameters. Any diameter of cutters can be available for use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a trench excavator, and more particularly to an excavator for forming a trench with a rectangular cross-section suitable for underground walls. [Background of the Invention] The wall is formed for purposes such as underground structures replacing caissons, wall foundations for high-rise buildings, foundations for tower-shaped buildings, and underground tank walls. This kind of underground continuous wall is constructed by first digging a wall-shaped trench underground using a trench excavator, then installing reinforcing bars into the trench, and then pouring concrete from above the ground. It forms a wall of elements and connects such elements to form a continuous wall as a whole underground.

Various trench drilling machines have been proposed in the past as trench drilling machines suitable for such underground continuous walls.

For example, the applicant of the present application has published a patent application published in Japanese Patent Application Laid-Open No.
21) The trench drilling machine disclosed in Publication No. 424 was proposed.

This trench drilling machine is constructed such that the main body 9 of the trench drilling machine can be suspended from the ground via lobes 12,12. Further, the excavation device main body 9 is equipped with a rotational drive source 16, 16 such as a transmission or a hydraulic motor.

As shown in FIG.
8 is formed, and this gear case 18 has a horizontal rotation shaft 20.
．． 20 are pivoted. This horizontal rotating wheel 20.20 is a drum-shaped cutter (hereinafter referred to as drum cutter) 22.
22 is fixed. The drum cutter 22 is formed in a size that can accommodate the gear case 18 therein.

The drum cutters 22, 22 are arranged with a predetermined gap as shown in FIG. Case 18A is now placed. A horizontal rotating wheel 28 of a ring-shaped cutter (hereinafter referred to as a ring cutter) 26 is pivotally supported on the gear case 18 . The ring cutter 26 is formed to have a smaller diameter than the drum cutter 22, and its central axis 28 is eccentrically arranged.

As shown in FIG. 8, there is a main body 9 in the upper part of the gear case 18A.
An example gear case 30 is provided, and the gear case 30
．． Gear transmission means for transmitting power from the rotational drive source 16 is arranged at 18A and 18. That is, the rotational drive source 16
The rotational force is transmitted to the gear 58 of the horizontal rotary shaft 20 via the gear transmission means, which rotates the horizontal rotary wheel 20 and rotates the drum cutter 22. Furthermore, gear 58 is idle gear 5
A pair of drum cutters 22.22 are disposed between the drum cutters 22.22 and the pair of drum cutters 22.22 are engaged with a gear 60 fixed to the horizontal rotating shaft 28 via the ring cutter 9, and the power is transmitted in this way to also rotate the ring cutter 26. ring cutter 26
As shown in FIG. 7, two units are arranged in parallel. When the two units are arranged in parallel in this way, since the ring cutter 26 has a smaller diameter than the drum cutter 22, a gap is formed on the opposing surface of the units, and the bits 62 and 62 are placed in this gap. be able to. This foot 62 is provided at the lower end of the reverse shaft 63 and can be placed below the drum cutter. The bit 62 is a gear transmission means 63 that transmits rotational force from a rotational drive source 66.
Rotate through A.

When the trench excavator configured as described above is lowered, a rectangular excavation hole is formed in the ground. FIG. 9 shows the general shape of the excavated hole excavated using the trench excavator. As shown in FIG. 9, the side surface 66 of the excavated hole 64 is formed in a smooth shape because the side surfaces of the drum cutter 22 and the ring cutter 26 are arranged on the same plane. Drum cutter 2
2 and the ring canter 26 are arranged so that they are substantially on the same plane, the bottom surface of the excavated hole 64 is also formed on the same plane. In addition, the unexcavated portion 70 formed in the center of the excavated hole 64 is excavated by the bits 62 and 62 because the bits 62 and 62 are arranged as described above, and the slime passes through the reverse shaft 63. It will be discharged to the ground.

However, with conventional trench excavators, when changing the length of the excavation trench 64 depending on the purpose of the structure, the cutter of the trench trench excavator cannot be freely replaced, and the excavator itself has to be replaced. was there.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a trench hole excavator that is economically effective and allows cutters of different diameters to be attached without changing the main body of the device. There is.

[Summary of the invention]

In order to achieve the above object, the present invention includes a pair of drum cutters that are arranged coaxially at a predetermined distance and have a rotational axis in a horizontal direction, and a pair of drum cutters that are arranged eccentrically with respect to the rotational axis of the drum cutter. a ring cutter, and a unit consisting of the pair of drum cutters and the ring cutter placed between the pair of drum cutters are arranged symmetrically about a reverse axis, and a vertical rotation axis is provided between the units. In a trench drilling machine equipped with a wing bit,
It has a first frame that can be hung and a first power transmission mechanism that transmits power from the mounted first rotary drive source to the wing bit, and is attached to the lower part of the first frame and can be attached and detached around the reverse shaft. A second frame that can be expanded and contracted via a first spacer, and a second frame that transmits power from a mounted second rotational drive source to a drum cutter and further transmits power to a ring cutter via the drum cutter. a third frame that can be expanded and contracted around the second frame via a second spacer that is detachable; and a third frame that can be expanded and contracted around the second frame; The distance between the rotating shafts of the drum cutter and the distance between the rotating shafts of the drum cutter and the rotating shaft of the ring cutter can be freely adjusted, and a drum cutter, ring cutter, and wing bit of any diameter can be attached. It is characterized by

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the trench drilling machine according to the present invention will be described in detail below with reference to the accompanying drawings.

In this embodiment, the same or similar members as in the conventional example shown in FIGS. 7 to 9 are given the same reference numerals, and detailed explanation thereof will be omitted.

A reverse shaft 63 passes through the center of the first frame 10 in the vertical direction, and the reverse shaft 63 passes through the center of the first frame 10 in the vertical direction.
A second frame 100.100 is detachably attached around the frame 3. The second frame 100 may be divided or integrated. A first drive source 70 is provided on one side of the second frame 100.

As shown in FIGS. 2 and 3, from the drive source 70 to the gear 7
1.72.73.74.75.76.77 to transmit power to a gear 78 fixed to the bit shaft 82, and from this gear 78 to a gear 79 and an idle gear 80 provided around the reverse shaft 63. Power is transmitted to the gear 81 fixed to the bit shaft 83 via the bit shaft 83. In addition,
The bit shafts 82 and 83 are provided at symmetrical positions across the reverse shaft 63 and transmit power to the gear 81 via the idle gear 80, so the center of the gear 79 is located at the reverse shaft 63.
It is provided eccentrically by δ with respect to the center of. Alternatively, if the gears 78, 79, and 81 are shift gears, they may not be eccentric. Alternatively, the gear 79 may be arranged around the outer circumference of the reverse shaft.

Third frames 102.102 are detachably attached to both sides of the second frame 100.100. Each of the third frames 102 and 102 is provided with a drive source 16.16, and from this drive source 16.16, a drum cutter 22 and a ring cutter 26 provided at the lower part of the third frame 102 are connected.
Power is transmitted to. Since the mechanism for transmitting power to the drum cutter 22 and the ring cutter 26 is the same as that shown in FIG. 8, detailed explanation will be omitted here.

The drum cutter 22, ring cutter 26, and wing bit 62 shown in FIG. 1 are replaced with the large diameter drum cutter 67, ring cutter 68, and wing bit 6 shown in FIG. 4, respectively.
9 will be explained. wing bit 6
2 to a wing bit 69 with a larger diameter than this wing bit 62, the wing bit 69
It is necessary to increase the distance between the bit shafts 82 and 83 according to the diameter of the bit shafts 82 and 83. In this case, first, as shown in FIGS. 5 and 6, the second frame 1 around the reverse shaft 63 is
00.100 is expanded and two spacers 84 are interposed,
Subsequently, a gear 89 with a larger diameter is provided in place of the gear 79. The spaces between the spacer 84, the frame 100, and the reverse shaft 63 are fixed with bolts or the like through a sealing material.

Also, when replacing the drum cutter 22 with a drum cutter 67 having a larger diameter than the drum cutter 22, it is necessary to increase the distance between the horizontal rotating shafts 20 of the drum cutters in the same manner as described above. In this case, the distance between the axes was increased by the spacer 84, but as shown in FIG.
Spacers 90 and 90 are interposed between the frame 100 and the third frame 102 to increase the distance between the axes of the horizontal rotating wheel 20.

Next, when replacing the ring cutter 26 with a ring cutter 68 having a larger diameter than this ring cutter 26, the horizontal rotating shaft 20 of the drum cutter 67 is It is necessary to adjust the distance between the axis and the horizontal rotating wheel 2 of the ring cutter 6B. In this embodiment, when replacing the ring cutter 26 with the ring cutter 68, spacers 92 and 92 are interposed to widen the distance between the axes by l. Furthermore, gear 59
A gear 94 with a large diameter is provided instead of the horizontal rotating shaft 20.
Power is transmitted from the ring cutter 26 to the rotating wheel 28 of the ring cutter 26 via gears 58, 94, 60.

Finally, the guide 14 is expanded according to the outer shape of the drum cutter 67 and the like. That is, the guides 14 are spread out via spacers 95, 96, and 97 arranged on the outside of the third frame 102. Note that each of the spacers described above can be attached as appropriate with bolts as shown in FIG. 5 through a sealing material.

〔Effect of the invention〕

As explained above, according to the trench drilling machine according to the present invention,
By interposing a spacer to adjust the distance between the horizontal rotating shafts, a cutter of any diameter can be installed, and the slot length can be adjusted to suit the purpose.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the trench drilling machine according to the present invention, FIG. 2 is a sectional view of the embodiment shown in FIG. 1, and FIG. 3 is a front view of the embodiment shown in FIG. 1. 4 is a cross-sectional view, and FIG. 4 is a front view showing the groove length of the trench excavator shown in FIG.
6 and 6 are respectively a plan sectional view and a front sectional view of the bit drive mechanism in FIG. It is an explanatory view showing the shape of the excavation hole excavated using the trench drilling machine. 10...first frame, 12...loaf, 16
...Rotary drive source, 18.18A, 30...Gear case, 20...Horizontal rotation axis of drum cutter,
22.67...Drum cutter, 26.68...
Ring cutter, 28...Horizontal rotation axis of ring cutter, 62.69...Bit, 63...Reverse axis, 64...Drilling hole, 82.83...Bit axis,
84.90.92.95.96.97...Spacer, 100...Second frame, 102...Third frame.

Claims (3)

[Claims] (1) a pair of drum cutters that are coaxially arranged at a predetermined interval and have a horizontal rotation axis, and a ring cutter that is eccentrically arranged with respect to the rotation axis of the drum cutter;
A unit consisting of the pair of drum cutters and a ring cutter arranged between the pair of drum cutters is arranged symmetrically about the reverse axis, and a wing bit having a vertical rotation axis is arranged between the units. The installed trench drilling machine has a first frame that can be suspended and a first power transmission mechanism that transmits power from the mounted first rotary drive source to the wing bit, and the first frame has a first frame that can be suspended. A second frame is attached to the lower part and surrounds the reverse shaft and is expandable and retractable via a detachable first spacer, and transmits power from the mounted second rotary drive source to the drum cutter, and transmits power from the drum cutter. a third frame having a second power transmission mechanism for further transmitting power to the ring cutter via the ring cutter, and expandable and contractible around the second frame via a detachable second spacer; By attaching and detaching the spacer, the distance between the rotation axes of the drum cutter and the distance between the rotation axes of the drum cutter and the ring cutter between the units can be adjusted freely, and the drum cutter or ring cutter of any diameter can be adjusted. A trench drilling machine characterized by being able to attach a wing bit. (2) The wing bits are configured as a pair, have opposite rotational directions, rotate at the same speed, and partially overlap each other. The trench drilling machine described in Section 1. (3) A pair of the wing bits are provided, and by attaching and detaching the first spacer, the rotation axes of the wing bits can be freely adjusted, and a wing bit of any diameter can be attached. A trench drilling machine according to scope 2.