JPS631414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trench excavator that makes it possible to construct continuous trenches on steep slopes such as mountains and hills.

Normally, when trench excavators are used to excavate trenches on steep slopes with irregular ground surfaces such as mountains and hills, when the excavating equipment is traversed across the slope, the vehicle that propels or guides the excavating equipment skids or drifts toward the valley side. This made it difficult to excavate on relatively gentle slopes (up to an inclination of about 15 degrees) due to slipping when climbing over obstacles.
In addition, this type of trench excavator can independently change the ground height of the left and right suspension legs, in other words, the valley side legs are extended high and the mountain side legs are shortened low to keep the traveling body horizontal and excavate along the lateral direction of the slope. However, even with these methods, skidding is still unavoidable on steep slopes with uneven ground surfaces. This was limited to cases where the friction retention force was good. In this way, during excavation work along the lateral direction of a slope, it is a fatal flaw for the vehicle body on which the excavation equipment is attached to skid, and it is especially difficult to excavate trenches along contour lines. When trench excavation is carried out continuously using a trencher or the like, problems such as damage to the equipment itself or loss of integrity of the excavated trench occur.

Therefore, in order to prevent the vehicle from skidding, etc. and improve its ability to run on uneven terrain, measures such as sufficiently lowering the ground pressure of the suspension system of the vehicle or increasing the number or size of wheels are adopted. However, when the surface of a slope is locally uneven, or on a wet grass surface that becomes slippery when the ground pressure is low, the skidding of the vehicle axis when driving on these terrains can cause lateral drift. It was not possible to prevent this, and there was a safety problem.

In addition, conventional continuous groove excavators can only excavate straight grooves, and it is difficult to excavate curved grooves, and it is even more difficult when the excavation groove depth is deep. This method has the drawback of lacking versatility, as it cannot be used to excavate detour ditches to avoid obstacles such as roads and streams, turn-around ditches that turn around without interrupting the ditch, and ditches that surround features.

The present invention has been made in view of the above-mentioned drawbacks of the conventional technology, and its first object is to provide groove guide legs that can be raised and lowered at the bottom of a traveling vehicle body, and to insert the groove guide legs into the groove during excavation. By contacting the side wall,
A trench excavator that prevents skidding and lateral drift of the running vehicle on steep slopes with uneven or poor ground surfaces in mountains, hills, etc., enables the excavation of continuous deep trenches, and improves work safety. It is about providing.

A second object of the present invention is to remove obstacles such as curved grooves, rocks, trees, etc. along contour lines by disposing an excavation device on a traveling vehicle body so that it can be raised and lowered and rotated horizontally. To provide a trench excavator capable of safely and easily excavating a detour trench or the like without being affected by topography, slope, obstacles, etc.

Furthermore, the third object of the present invention is to hold the traveling vehicle horizontally by raising and lowering the traveling device and guiding legs in the trench, thereby making it possible to excavate trenches on steep slopes, ensuring the safety of onboard workers, and facilitating stable work operations. Our goal is to provide a trench excavator that makes it possible to

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is a partially omitted side sectional view showing an embodiment of the trench excavator according to the present invention in an excavating state, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along the line B-- Partially cutaway front view seen from line B, Figure 4 is Figure 1 C-C
FIG. In Figure 1, the whole is denoted by 1.
The trench excavator shown in 2 includes a traveling vehicle body 2 that is integrally formed with a frame or the like. A driver's cab 4 is provided in the center of the upper surface of the traveling vehicle body 2, in which a worker 3 rides and operates various devices, mechanisms, etc., which will be described later. A device is installed to generate the required hydraulic operating force and supply it to various devices and mechanisms that perform travel, excavation, earth removal, etc. The hydraulic pressure supplied from the hydraulic power source 5 is controlled by the worker 3 operating the hydraulic controller 7 in the driver's cab 4 or by an automatic control mechanism, etc., and is configured to operate the hydraulic operating parts of various devices and mechanisms. has been done.

A total of four traveling devices 10 having the same structure are disposed at the front and rear of the left and right side surfaces of the traveling vehicle body 2, as shown in FIGS. 2 and 3. These traveling devices 10 are each independently driven up and down to hold the vehicle body 2 horizontally and run, and are moved in a direction perpendicular to the vehicle body plane, that is, up and down, to adjust the mounting position ( The suspension system 11 includes a suspension system 11 whose handle height is variably set, and running wheels 12 that are in contact with the ground surface. To explain these structures in more detail, as shown in FIGS. 2 and 4, the suspension system 11 includes slide legs 15 fitted into guide blocks 14 fixed to the side plate 13 of the vehicle body so as to be slidable in the vertical direction. and guide block 1
A leg vertical hydraulic motor 16 for driving the slide leg 15 is fixed on the surface of the slide leg 4. On the other hand, inside the guide block 14 is the hydraulic motor 16.
a bevel gear 17 fixed to the shaft end of the bevel gear 1;
A passive bevel gear 19 is disposed, which meshes with 7 at right angles and is screwed onto the threaded rod 18.
9 is received by the inner bottom surface of the guide block 14. The threaded rod 18 passes through the guide block 14, and its upper and lower ends are fixedly held at the upper and lower ends of the slide leg 15.

Therefore, the bevel gear 17 is rotated by the drive of the hydraulic motor 16, and the passive bevel gear 1 meshes with the bevel gear 17.
When the gear 9 is rotated, the thrust of the gear 19 is received by the guide block 14, so the threaded rod 18 and slide leg 15 that engage with the gear 19 slide vertically along the guide block 14. The height of the running wheels 12, which will be described later, is arbitrarily changed. This control is performed by adjusting the rotational direction and speed of the drive motor 16, and depending on the traveling terrain or excavation state, each traveling device 10 can be controlled individually, left and right or front and back simultaneously, or all traveling devices 10 can be controlled simultaneously. By operating these simultaneously, the traveling vehicle body 2 is held substantially horizontally. In this case, the expansion and contraction of each traveling device 10 may be controlled manually or by the traveling vehicle body 2.
Alternatively, it may be automatically controlled via an attitude detector of the excavation rig, which will be described later.

As shown in FIG. 2, the traveling wheel 12 has a hub axle 20 fixed to the lower end of the slide leg 15, and this hub axle 20 has a hydraulic motor 2 for driving the wheel.
A hub 23 is integrally provided with a hub 23 built-in and fixed therein. A bearing 25 is provided on the outer periphery of the hub 23.
A wheel 26 is rotatably disposed through the wheel 26, and the rotation of the hydraulic motor 22 is transmitted to the wheel 26 through a planetary gear mechanism 28. That is, the planetary gear mechanism 28 is
A sun gear 29 fixed to the output shaft 27 of the drive motor 22, and an internal gear 31 integrally provided on the sun gear 29 and the inner peripheral wall of the wheel 26.
For example, three planetary gears 30 mesh with each other.
These planetary gears 30 are connected to the hub 2.
They are each rotatably supported by pins 34 of No. 3. A grouter 35 that is in contact with the ground is disposed on the outer peripheral surface of the wheel 26, while a well-known brake mechanism 36 is incorporated inside.

The forward and backward movement of the vehicle body 2 is driven by the rotation of the drive motor 22 built into each vehicle wheel 12.
The speed is decelerated by the planetary gear mechanism 28 and transmitted to the wheels 26, and turning to the left and right is performed by changing the rotational speed of the left and right running wheels 12, braking the inner wheels, etc. That is, the traveling wheels 12 of each traveling device 10 are controlled individually or in conjunction with each other to enable the traveling vehicle body 2 to move forward and backward and turn left and right.

Although a wheel type traveling device 10 is shown, the present invention is not limited to this, and it goes without saying that various types of traveling devices such as a crawler type traveling device may be used.

An excavating device 40 is disposed at the front of the traveling vehicle body 2 so as to be able to move up and down and turn at a predetermined angle in the left and right directions, thereby making it possible to excavate straight grooves and curved grooves. To explain the configuration of the excavation device 40 in further detail, as shown in FIG.
1 is suspended horizontally, and the upper end of a vertical vertical beam 43 extending in the vertical direction is fitted and fixed in the center of this horizontal beam 41. A pair of chain sprockets 44 are provided at the upper and lower ends of the longitudinal beam 43, respectively.
a, 44b, 45a, 45b (see FIG. 3) are rotatably arranged. Further, a hydraulic motor 47 is disposed at the tip of one arm 42a of the pair of arms 42a, 42b, and its shaft 48
A chain sprocket 49 is fitted and fixed to the tip of the chain sprocket. The tip of the shaft 48 is pivotally supported by a bracket 55 fixed to the center of the horizontal beam 41 and extending rearward. At the rear end of the bracket 55 are three chain sprockets 51, 52a, 5.
2b is fixed. A rotating shaft 53 is rotatably disposed, and a chain sprocket 49 of the shaft 48
A driving link chain 56 is spanned over the chain sprocket 51, and a pair of chain sprockets 52a, 52b and the aforementioned longitudinal beam 4 are similarly connected.
3 chain sprocket 44a, 44b, 45
Link chains 59a and 45b are also connected to a and 45b, respectively.
59b (see Figure 1) is spanned. Therefore, the upper ends of the link chains 59a and 59b protrude rearward on the back side of the vertical beam 43, thereby forming a substantially triangular cavity 60 as shown in FIG.
is formed, and the horizontal beam 41 is inserted into this gap 60, and the bracket 55 can be attached thereto. On the other hand, the lower end of the excavating device 40, that is, the excavating operation part, has the same cross-sectional shape and is formed into a substantially circular shape by a cutter 62, which will be described later. making excavation possible.

That is, the pair of link chains 59a,
As shown in FIGS. 4 and 5, the plurality of cutters 62 commonly attached at predetermined intervals of 59b are formed into a flat plate shape and have a substantially square shape, thereby forming a straight front blade portion. 62a and this blade part 6
The blade portion 6 is integrally connected to both ends of the blade 2a.
The cutters 62 are provided with a pair of arcuately curved side blades 62b and 62c extending rearward of the cutter 2a, and have a substantially circular cross-sectional shape (see FIG. 5) between the cutters 62 located front and back with the vertical beam 43 in between. By rotating and traveling together with the link chains 59a and 59b, the groove 64 can be excavated, and at the same time, the excavated earth and sand can be lifted up and guided to an earth removal machine to be described later. In addition,
The link chains 59a, 59b are formed into longitudinal beams by transmitting the rotation of the shaft 48 by the drive motor 47 to the chain sprockets 52a, 52b via the chain sprocket 49, the link chain 56, the chain sprocket 51, and the rotating shaft 53. It is rotated so that it rises on the front side of 43 and descends on the rear side. Also, Katsuta 6
2 is not limited to a flat plate shape, but may be in the shape of a mountain with the apex at the center, and may be attached obliquely in the advancing direction of the link chains 59a, 59b.

Inside the pair of link chains 59a and 59b, as shown in FIGS. 4 and 5, a plurality of small rollers 70 are rotatably disposed at predetermined intervals,
These small rollers 70 are fixed to a slide bracket 71 at a substantially central position on the back surface of the longitudinal beam 43.
By rolling the slide portions (see FIG. 1), a travel path for the chains 59a, 59b is formed.

The rear end portions of the pair of left and right arms 42a, 42b are connected and fixed to slide blocks 76A, 76B, respectively, which are formed into a substantially U-shape and have openings facing each other, as shown in FIG. The blocks 76A and 76B are fitted and held on both side edges of the portal guide 77 so as to be slidable in the vertical direction, respectively. The gate-shaped guide 77 is connected and fixed perpendicularly to the tip of a boom 79 which is disposed on the front upper surface of the traveling vehicle body 2 via a short shaft 78 so as to be able to swing freely in the left-right direction. The short shaft 78 is located on the longitudinal center line of the vehicle body 2, and each of the booms 79 has one end connected to the vehicle body 2.
A pair of swing hydraulic cylinders 80A connected to
The 80B allows it to turn within a range of approximately 20 degrees in the left and right directions, making it possible to dig curved trenches.

In this case, since the lower end of the excavating device 40 has a substantially circular cross section as described above, the groove width does not change.

On the other hand, the pair of slide blocks 76A, 7
6B, in other words, the vertical movement of the excavating device 40 is performed by the frame 82 that connects both blocks 76A and 76B.
A wire 83 (see FIGS. 1 and 6), one end of which is locked in the center of It is configured to be performed by rewinding,
This allows the excavation depth of the groove 64 to be set arbitrarily. Further, this excavation depth can be adjusted within certain limits by changing the ground clearance of the traveling vehicle body 2 by adjusting the mounting height of the traveling device 10 described above.

At the lower part of the traveling vehicle body 2, a pair of front and rear groove guide legs 90A are inserted into the groove 64 during excavation to prevent the traveling vehicle body 2 from skidding, etc.
90B are each suspended and held by a pandagraph type elevating mechanism 91 and disposed on the center line of the vehicle body 2 in the longitudinal direction. Since these pair of guide legs 90A and 90B are configured identically, for example, only the configuration of the front guide leg 90A will be described in detail based on FIGS. 1, 2, and 7. The legs 90A are a pair of upper and lower disks 94a and 94b rotatably supported on a vertical shaft 93.
and a disk disposed coaxially around the axis 93 and located between the pair of disks 94a and 94b.
For example, six rollers 95 are provided, each roller 95
is rotatably supported at both ends by a pin 96 which is pivotally supported by the pair of disks 94a and 94b. In this case, the outer diameter of the guide leg 90A is
By setting the width to be almost the same as the width of the groove 64, in other words, the cutter 62, when inserted into the groove 64,
A total of four rollers 95, one pair on each side, are configured to contact each side wall 64a of the groove 64, respectively. Therefore, when the traveling vehicle body 2 traverses a steep slope and excavates a continuous trench along the contour line, the lateral movement is restricted by the pair of front and rear guide legs 90A, 90B, so that sideways slipping, etc. may occur. There isn't.

The elevating mechanism 91 that holds the guide leg 90A in a vertically movable manner is composed of a total of eight link members, four on the left and right (as viewed from the front of the vehicle), and
Four lower links 100a, 100b, 106a, 1 arranged oppositely in pairs on the left and right, respectively.
06b (however, 100a is not shown), and four approximately dogleg-shaped upper links 103a, 103b, 10, which are similarly arranged in pairs on the left and right, facing each other.
7a, 107b (however, 103a is not shown), and lower links 100a, 100b and 1
The lower end portions of the guide legs 06a and 106b are rotatably connected to both ends of a horizontal shaft 102 extending in the left-right direction and supported by a bearing 101 integrally provided at the center of the upper surface of the guide leg 90A. On the other hand, a pair of left and right upper links 103a, 103b and 10
7a, 107b are brackets 108a, 108b, and 109 whose bent portions are fixed to the lower surface of the vehicle body 2, respectively, at an equal distance back and forth from a vertical line R passing through the center of the shaft 102 (see FIG. 1).
a, 109b (however, 108a is not shown) via shafts 110a, 110b, 111a, 111b (however, 110a is not shown) so as to be rotatable. Bracket 108 located on the front side
The lower ends of the left and right upper links 103a, 107a supported by the lower links 103a, 109a and the lower links 1
The upper end of 00a, 106a is one horizontal axis 10
4, and the lower ends of the left and right pair of upper links 103b, 107b located on the rear side and supported by brackets 108a, 109b and the remaining lower links 100b, 106b.
The upper end portions of the two are also rotatably connected by one horizontal shaft 105. Further, a pair of left and right hydraulic cylinders 113 and 114 for raising and lowering guide legs are disposed on the lower surface of the traveling vehicle body 2 in opposite directions, and the upper ends of the upper links 103b and 107a are connected to pins at the tips of the pistons 113a and 114a, respectively. They are rotatably connected via. On the other hand, the upper ends of the other upper links 103a and 107b are connected to the main bodies of the cylinders 113 and 114.

Therefore, when the hydraulic cylinders 113 and 114 are simultaneously driven to extend and retract the elevating mechanism 91,
The guide leg 90A moves up and down and is set and held at an arbitrary position, and is stored close to the bottom surface of the traveling vehicle body 2 except when excavating.

At the front of the traveling vehicle body 2, left and right integrated screw-type earth removers 120, 121 are further disposed on both sides of the excavation device 40. These pair of earth removers 120, 121 are configured to be raised and lowered independently so as to be able to cope with excavation on steep slopes. In this case, since the structure is exactly the same, only the structure of the left earth removing machine 120 will be described in detail based on FIG. 4.
and an arm 126 that rotatably supports the outer end of the shaft 125 of the earth removal screw 124.
8, a sprocket 129 fixed to the shaft 12;
The signal is transmitted through a sprocket 130 fixed to the outer end of the engine 5 and a chain 131 that spans both sprockets 129 and 130. The arm 126 is bent into a substantially doglegged shape, and its base is connected to the bracket 1 fixed to the lower surface of the gate-shaped guide 77, as shown in FIG.
32 via a shaft so as to be freely rotatable in the vertical direction, and is rotated in the vertical direction by a hydraulic cylinder 133 shown in FIG. configured to be held in position. In addition, the soil removal screw 124
Since it is attached to the gate-shaped guide 77 via the arm 126, it always faces in the same direction as the excavation device 40, and discharges the earth and sand lifted by the cutter 62 outward.

As shown in FIG. 4, the front edge of the traveling vehicle body 2 is formed into an arc shape centered on the short axis 78, and a pair of rollers 141 disposed on the back side of the gate-shaped guide 77 are attached to this arc portion 140. It is configured to contact and roll.

Next, the operation of the trench excavator 1 having the above configuration will be explained.

First, when traveling on flat ground, in order to maintain the ground clearance necessary for traveling as shown in FIG.
and lift the earth removal machines 120, 121 upward,
The left and right traveling devices 10 are extended to a required dimension to have the same height front and rear, left and right, and the vehicle travels while maintaining ground clearance and horizontality of the traveling vehicle body 2 and the like.

When climbing or descending a slope, the ground clearance and horizontal state of the vehicle body 2, etc., are maintained as in the case of running on a flat surface. In this case, as shown in FIG. 8b, when climbing a steep slope, the pair of front running gears 10 is retracted, and the pair of rear running gears 10 is extended (the opposite is true when descending), and the running vehicle body 2 is The levelness is maintained, preventing a drop in effective ground pressure due to the downward descent of the center of gravity G, and at the same time increasing the stability of the traveling vehicle body 2 and increasing the slope climbing ability.

When climbing a slope for a certain distance and moving to traverse the slope, as shown in FIG. Center of gravity G of the traveling vehicle body 2
By moving the vehicle to the mountain side and maintaining the left and right sides horizontally, the ability to traverse the slope is increased, and the safety and operability of the traveling vehicle body 2 and the occupants can be improved.

In addition, when turning in the running conditions shown in FIGS. 8a, b, and c, the drive speeds of the running wheels 12 of the right-hand traveling device 10 and the left-hand traveling device are changed, or one side is braked or reversed. Needless to say, it is possible to turn the vehicle in a desired direction by doing the following.

Next, excavation on a steep slope is carried out in a state where the excavation is carried out across the slope as shown in FIG. 8c. In this case, the traveling vehicle body 2
is the drilling rig 40, while maintaining the required ground clearance.
Ditch guide legs 90A, 90B and earth removal machine 120,
When the excavator 121 is gradually lowered as shown in FIG. 8d, the excavating device 40 touches the ground and excavation by the cutter 62 (see FIG. 1) begins. The excavating device 40 descends as it excavates, increasing the excavation depth, but by raising the traveling device 10, the ground clearance of the traveling vehicle body 2 is relatively lowered to the lowest possible position as shown in FIG. 8e. After that, the excavating device 40 and groove guide legs 90A, 90B are further lowered to perform deep groove excavation while preventing the vehicle body 2 from skidding or the like. FIG. 8f shows this state.

The left and right earth removers 120 and 121 are set and held at different height positions so as not to touch the slope, and the cutter 6
2, the earth and sand excavated and scooped up is discharged outward. However, if the ground surface is soft, if the soil removal screw 124 on the mountain side is actively driven into the ground surface and rotated, a small Large-scale excavation is also possible, and landslides around the trench can be prevented. Further, the necessary pressing force against the excavation surface of the excavation device 40 is provided by the propulsion force of the traveling vehicle body 2.

A pair of front and rear guide legs 90 inserted into the groove 64
Since the widths (outer diameters) of the rollers A and 90B are made to approximately match the inside of the groove 64, the four left and right rollers 95 come into contact with the side walls 64a of the groove 64, as shown in FIG. It rolls along the traveling direction of 2. Therefore, the center O of each guide leg 90A, 90B,
O' is the center line Y of the curved groove 64 as shown in FIG.
By this, the traveling vehicle body 2 is held on the center line Y of the groove 64 at two points, the centers O and O'.

Furthermore, since the guide legs 90A and 90B are rotatably supported by a shaft 93 (see FIG. 7),
When the excavated groove 64 is curved, in addition to the rolling of the roller 95 along the curved surface of the groove side wall, the guide legs 90A, 9
The entire 0B rotates, allowing the traveling vehicle body 2 to move forward smoothly. In this case, the excavation device 40 has a substantially square-shaped cutter 62, and a swing hydraulic cylinder 80.
The digging direction can be changed by rotating the boom 79 left and right as the booms A and 80B (see Fig. 4) are driven, making it possible to dig a curved trench with the same trench width as a straight trench. Prevent damage to itself.

Note that the roller 9 rolling in contact with the groove side wall
5 is prevented from moving forward by a foreign object protruding from the groove side wall, the guide legs 90A and 90B are rotatable as described above, so they will rotate and overcome the obstacle, and the next adjacent roller 95 will move forward. By rolling in contact with the groove side walls, the traveling vehicle body 2 is prevented from running and skidding. In addition, the guide legs 90A, 90
B is supported by a bearing 101 (see Fig. 2) and a shaft 102 so as to be rotatable in the front and rear directions, so that forward movement will not be hindered even if, for example, the inclination angle in the forward direction of excavation changes suddenly. .

Although the above embodiment describes the case where the guide legs 90A and 90B are constructed by arranging a plurality of rollers 95 concentrically around the shaft 93, the present invention is not limited to this in any way. The vehicle body 2 slides in sliding contact with the groove side wall and moves integrally with the traveling vehicle body 2.
Of course, any material that prevents the vehicle from skidding or the like may be used.

Further, the cross-sectional shape of the excavation part of the excavation device 40 is approximately circular, and the shape of the cutter 62 itself is not limited to the shape of the embodiment.

As explained above, the trench excavator according to the present invention has
A guide leg that can be raised and lowered is provided at the bottom of the vehicle body, and the guide leg is inserted into the trench and brought into contact with the side wall of the trench during excavation. It is possible to prevent lateral drift of the vehicle axis when skidding or going over uneven ground, and trench excavation on steep slopes can be performed stably and reliably. In addition, since the traveling device that supports and runs the traveling vehicle body is raised and lowered independently, it is easy to ensure the horizontality of the traveling vehicle body on a slope, excellent maneuverability and safety, and the verticality of the excavated trench is ensured. Furthermore, since the running gear moves up and down vertically and its mounting height changes, the running vehicle body does not move back and forth due to the mounting height, and the slope and ground surface continue to change, causing the running gear to change. Enables smooth propulsion excavation even when the installation height of the excavator is changed, and enables leveling, smooth, safe and easy trench excavation in the slope direction on uneven ground and steep slopes, which are normally difficult. .

Furthermore, the excavation equipment is arranged so that it can be raised freely and rotated left and right, and is equipped with a cutter consisting of a front blade part and a side blade part, making it possible to excavate curved grooves with the same groove width as straight grooves. do. Therefore, continuous grooves from flat land to slopes include curved grooves that follow the contour lines of slopes, curved grooves that bypass or surround obstacles such as rocks and trees, and curved grooves that convert straight grooves to transverse grooves on uphill and downhill roads. It is possible to excavate continuous trenches without interruption in various types of terrain, such as excavated trenches and other turned continuous trenches. In addition, the trench excavator of the present invention is capable of traveling on its own using a traveling device and can freely traverse slopes, and can be used in rocky areas that are difficult to excavate or bypass during continuous trench excavation.
Even if it encounters a wooded area, a stream, or a mountain path, it can easily and safely overcome it without falling or skidding due to the action of the traveling device, guide legs, etc.
The effect is very large, and the excavation can be resumed after a certain period of time, and it is highly versatile.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted side sectional view showing an embodiment of the trench excavator according to the present invention in an excavating state, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along the line B-- Partially cutaway front view seen from line B, Figure 4 is Figure 1 C-C
Line sectional view, Fig. 5 is a sectional view taken along line D-D in Fig. 1, Fig. 6.
The figures are a sectional view taken along the line E-E in Figure 1, Figure 7 is a bottom view of the guide leg, and Figure 8 is a diagram for explaining the running and excavating operation of the trench excavator. FIG. 9 is a diagram for explaining the ascending and descending state of a slope, c is a traversing state, d to f are trench digging states, and FIG. 9 is a diagram for explaining curved trench digging. 1... trench excavator, 2... traveling vehicle body, 10... traveling device, 40... excavating device, 62... cutter, 6
2a...Front blade part, 62b, 62c...Side blade part,
64... Groove, 90A, 90B... Guide leg.

Claims (1)

[Scope of Claims] 1. A traveling vehicle body, a plurality of traveling devices disposed on both sides of the traveling vehicle body and held horizontally by being raised and lowered independently, and a plurality of traveling devices arranged on the traveling vehicle body such that they can be raised and lowered freely. an excavator installed to excavate a groove; and a guide leg disposed at a lower part of the traveling vehicle body so as to be freely raised and lowered, and which is inserted into the groove and comes into contact with the groove side wall when excavating the groove to prevent the traveling vehicle body from skidding sideways. A trench excavator characterized by comprising: 2. A traveling vehicle body, a plurality of traveling devices disposed on both sides of the traveling vehicle body and held horizontally by being raised and lowered independently, and an excavation device disposed on the traveling vehicle body for excavating a trench. , a guide leg disposed at a lower part of the traveling vehicle body so as to be freely raised and lowered, and being inserted into the groove during trench excavation and prevents the traveling vehicle body from skidding by coming into contact with the groove side wall, the excavating device The cutter is equipped with a plurality of cutters each consisting of a front blade portion and side blade portions provided on both sides of the front blade portion, the cross-sectional shape of the excavation portion is approximately circular, and the excavation portion is movable up and down on the traveling vehicle body and can be moved horizontally. A trench excavator characterized by being arranged so that it can rotate freely.