JP2684064B2 - Excavator moving equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a moving device for moving an excavator used for excavating underground or natural ground forward or backward in an excavation mine.

"Prior art" Generally, excavators are roughly divided into two types: shield excavators mainly used for soft ground in urban areas and tunnel excavators used for relatively hard ground in mountainous areas. To be The former shield machine advances in the excavation direction by utilizing the propulsive force of the shield jack, and the latter tunnel machine excavates in the excavation direction mainly by the following three traveling types. It is a thing.

That is, (1) a rail is laid horizontally on the lower lining surface of the excavation pit, and the excavator main body travels on the rails via wheels, (2) a shoe on the lower lining surface of the excavation pit ( (Crawler plate) is laid and the excavator main body is run on this shoe via a crawler (caterpillar). (3) Used for a free-section excavator, etc. It is a sled type so-called walking shoe type in which the rails are alternately moved forward or backward like a scale insect.

"Problems to be solved by the invention" However, in the rail type among the above three traveling types, the positioning accuracy of the excavator main body is greatly affected by the rail laying accuracy and the distance between the rail and the brim of the wheel, and the positioning is easy. However, it is difficult to correct it, and there is the trouble of having to newly lay a traveling rail on the extension line of the excavation face.Furthermore, the weight of the excavator body, the weight of the laid rail, and the excavation reaction force are all Since it is supported by the sleepers below, there is a risk that the lining surface made of concrete will be damaged especially in the soft ground where the ground contact surface with the sleepers.

Also, in the crawler type, the excavation reaction force is supported only by the frictional force between the ground contact surface of the shoe and the lower plate,
There is a risk of damaging the lining surface of the excavation pit such as soft ground.Therefore, it was necessary to increase the size of the crawler compared to the size of the excavator body and reduce the ground contact pressure of the shoe so as not to damage the lining surface. .

Furthermore, in the walking shoe type, the shoe cannot match the cross-sectional shape of the excavation hole, so the positioning accuracy is low and it is difficult to correct it.As with the crawler method, the lining surface of the excavation hole such as soft ground is difficult to correct. In order not to damage it, there was a problem of making the shoe larger.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a moving device for an excavator, which enhances the positioning accuracy of the excavator and can advance without damaging the lining surface of the excavation hole such as soft ground. .

"Means for Solving the Problem" The present invention comprises a base grounded on the lower surface of an excavation shaft, and a chassis on which the excavator main body is mounted horizontally and slidably supported forward and backward. And, between these chassis and the base, a cylinder mechanism for alternately advancing or retracting the two along the excavation direction is provided,
Further, between the chassis and the lower surface of the digging pit, when the base is moved forward or backward, a push-up mechanism for pushing up and supporting the chassis from the lower surface of the digging pit to float the base is provided, and the push-up mechanism is A ski having a base end rotatably supported by the chassis via a shaft, and a telescopic jack provided between the tip of the ski and the chassis, and the ski, Formed so that its intermediate portion projects downward with respect to the line connecting the shaft and the tip of the ski, and further, the grounding surfaces of the base and ski are curved so as to follow the cross section of the excavation shaft. Is.

[Operation] According to the excavator moving device of the present invention, the grounding surfaces of the base and the ski are curvedly formed along the cross section of the excavation hole, so that the positioning accuracy of the excavator body can be increased, and the machine body can be improved. The weight and the reaction force of the excavation can be dispersed and supported as the surface pressure along the cross section of the excavation hole, and the lining surface of the excavation hole is not damaged.

[Embodiment] FIGS. 1 to 6 show an embodiment of the present invention. In these drawings, reference numeral 1 is an excavator body, reference numeral 2
Are moving devices of the excavator main body 1, respectively.

The moving device 2 includes a base 4 which is grounded on a lower lining surface (lower surface) 3 made of sprayed concrete of the excavation pit T, and a base 4 which is horizontally and slidably supported on the base 4 and is slidable on the upper surface 5a. It is mainly composed of a chassis 5 on which 1 is mounted.

The base 4 is provided with a pair of side portions 7 and 7 each having a shoe 6 at the bottom thereof, and a pair of guide wheels 8 for sliding the chassis 5 back and forth on the inner surfaces of the side portions 7 and 7, respectively. , 8 are provided so as to be vertically rotatable, and a support surface (ground contact surface) 6a of the shoe 6 is formed in a curved shape along the lower lining surface 3 of the excavation pit T. Further, a pair of slide rails 9, 9 having U-shaped cross-sections, which are horizontally fitted to the guide wheels 8, 8 facing each other and arranged in parallel to each other, are fixed to the lower surface of the chassis 5. An earth apron 10 having an inclined surface 10a for loading excavation shears is attached to the tip of the cutting face 5 of the cutting face.

Between the chassis 5 and the base 4, there is provided a cylinder mechanism 11 for alternately advancing or retracting the two along the excavation direction of the excavation pit T. The cylinder mechanism 11 is composed of a pair of propulsion cylinders 12 and 12, and the propulsion cylinder 12 is composed of a cylinder body 13 and a telescopic rod 14 retractably housed in the cylinder body 13. A direction in which the chassis 5 and the base 4 are separated from each other by connecting the rear end 13a of the cylinder body 13 to the inner surface of the side portion 7 of the base 4 and the tip 14a of the telescopic rod 14 to the tip 9a of the slide rail 9. It is possible to move relative to each other or in the direction of approaching each other.

Further, between the chassis 5 and the lower lining surface 3 of the excavation mine T, when the base 4 is moved forward or backward, the chassis 5 is pushed up and supported from the lower lining surface 3 of the excavation mine T to float the base 4. A push-up mechanism 15 is provided to allow the push-up mechanism 15 to move. The push-up mechanism 15 includes a pair of shafts 16 and 16 positioned on both ends 9a and 9b of the slide rails 9 and 9 facing each other and both ends thereof being supported on the inner surface thereof, and one end 17a of each of the shafts 16 and 16 extending vertically. The other end is rotatably supported.
A pair of skis 17, 17 having a support surface (ground contact surface) 17c for the lower lining surface 3 of the excavation pit T in 7b, a lower end thereof is connected to the other end 17b of the ski 17, and an upper end thereof is a slide rail 9, 9
A set of telescopic jacks connected to the shaft via shaft 1
It is composed of 8 and 18. The supporting surface 17c of the ski 17 is similar to the supporting surface 6a of the base 4 in the excavation pit T.
The lower lining surface 3 is curved.

Next, a method for moving the excavator body 1 using the moving device 2 configured as described above will be described according to the excavation work of the excavation pit T.

In the state shown in FIG. 1, the supporting surface 6a of the base 4 is grounded on the lower lining surface 3 of the digging pit T so that the base 4 supports the weight of the vehicle and the digging reaction force. It is raised above the lower lining surface 3. When excavating the excavation pit T from this state,
As shown in FIG. 3, the telescopic rod 14 of the propulsion cylinder 12 is extended to slide the slide rail 9 in the excavating direction, and the chassis 5 and the excavator main body 1 are advanced to the cutting face. In this state, excavation of earth and sand, loading of excavated skid, and rearward transportation are performed.

Next, when the excavation work is completed by one step, the chassis 5 is once returned to the original state shown in FIG. 1, the inner peripheral surface of the excavation is lined with concrete spraying, and then the chassis 5 is shown again in FIG. Slide back to the state.

Next, as shown in FIG. 4, by extending the telescopic jack 18 downward, each ski 17 is pivoted downward so that its supporting surface 17c is grounded on the lower lining surface 3.
In this state, the slide rails 9, 9 are evenly pushed up by utilizing the pushing reaction force of the jack 18, and the base 4 is levitated horizontally from the lower lining surface 3.

Next, as shown in FIG. 5, the telescopic rod 14 of the propulsion cylinder 12 is contracted to advance the base 4 in the levitated state to the face of the face. Then, each telescopic jack 18 is contracted so that the base 4 is gradually lowered onto the lower lining surface 3 to be in contact with the ground, and the skis 19 are lifted from the lower lining surface 3 to set the state as shown in FIG. To do.

After that, by repeating the above procedure, the excavator body 1
By advancing in the excavating direction and by reversing the above procedure, the excavator main body 1 can be retracted.

According to this embodiment, the following excellent effects are obtained.

Since the grounding surfaces of the shoes 6 of the base 4 and the chassis 5 are matched with the lower lining surface 3 of the pit T, respectively, the curved sections of the pit T are used as running guides to alternate the base 4 and the chassis 5. It can be moved forward or backward.

As a result, the positioning accuracy of the excavator main body 1 can be improved and the correction can be easily performed.

Since the body weight and the excavation reaction force can be dispersed and supported on the excavation pit T cross section as a uniform surface pressure on the ground contact surface 6a of the base 4, there is little fear of damaging the concrete surface of the lower lining surface 3 or the ground.

"Effects of the Invention" As described in detail above, according to the present invention, a base grounded on the lower surface of an excavation shaft, and a chassis on which the excavator main body is mounted horizontally and slidably supported forward and backward. And a cylinder mechanism for alternately advancing or retracting both of them along the excavation direction between the chassis and the base, and a base between the chassis and the lower surface of the excavation hole. When moving forward or backward, a lifting mechanism is provided for lifting and supporting the chassis from the lower surface of the digging pit to lift the base, and the lifting mechanism is rotatably attached to the chassis via a shaft. It is composed of a supported ski, and a telescopic jack provided between the tip of the ski and the chassis. The ski has an intermediate portion that is the shaft and the tip of the ski. It is formed so as to project downward with respect to the connecting line, and further, the grounding surface of each of the base and skis is
Since it is curved so as to follow the cross section of the excavation pit, the positioning accuracy of the excavator main body can be improved, and its correction can be easily performed. It is possible to dispersively support the surface pressure along the cross section of the excavation pit on the ground, and it has an excellent effect of not damaging the concrete surface of the lower surface and the ground.

Furthermore, the push-up mechanism is composed of a ski having a base end rotatably supported by a chassis via a shaft, and a telescopic jack provided between the tip of the ski and the chassis. Since the middle part of the ski is formed so as to be positioned below the line connecting the tip of the ski and the shaft, this allows the middle part of the ski to come into contact with the ground when the telescopic jack is extended, and this is the fulcrum. The "lever principle" can be used to push up the chassis, and therefore the telescopic jack can be downsized.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a configuration diagram showing a state in which a moving device of an excavator is installed in an excavation pit, and FIG. 2 is a line I- in FIG. A view from the direction of arrow I, FIGS. 3 to 5 are shown for explaining the moving method of the excavator, and a configuration diagram of the moving device of the excavator, respectively, and FIG. 6 are arrows II-II in FIG. It is a perspective view. 1 ... Excavator body, 2 ... Moving device, 3 ... Lower lining surface (bottom surface), 4 ... Base, 5 ... Chassis, 6a, 17c ... Support surface (ground surface), 11 ... Cylinder mechanism , 15 …… push up mechanism, T …… excavation pit.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Ichikawa 4-11-11 Yachiyodaito, Yachiyo-shi, Chiba (56) References JP-A-56-73798 (JP, A) JP-A-55-111597 (JP) , A) Actual development Sho 61-206797 (JP, U)

Claims (1)

(57) [Claims] 1. A base grounded on a lower surface of an excavation shaft, and a chassis which is horizontally and slidably supported by the base and has an excavator main body mounted on an upper surface thereof, and between the chassis and the base. Is provided with a cylinder mechanism for alternately advancing or retracting the two along the excavation direction, and between the chassis and the lower surface of the excavation shaft, when advancing or retracting the base, the chassis is lower surface of the excavation shaft. A push-up mechanism for pushing up and supporting the base to lift the base is provided, and the push-up mechanism includes a ski having a base end rotatably supported by the chassis via a shaft, and a ski of the ski. The ski has a telescopic jack provided between the tip and the chassis. The ski has an intermediate portion protruding downward with respect to a line connecting the shaft and the tip of the ski. Is formed, further, each of the ground surface of the base and the ski, excavator moving device, characterized in that it is curved along the wellbore section.