JPS621352Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shield excavator equipped with a shear loading machine that allows excavated shear to be completely loaded onto a conveying device without interrupting excavation work.

An example of a conventional shield excavator is explained with reference to Fig. 1.A is an excavator, and the excavator body c is supported by a freely rotatable shaft b, and the radius of rotation can be changed by a hydraulic jack d. A cutter e for excavating the ground is provided at the tip of the excavator main body c so that it can rotate.

Further, f is a shear loading machine, and the bucket g can be moved forward and backward by a hydraulic cylinder (not shown), and can also be swung up and down by a hydraulic jack h.

In the above-mentioned shield excavator, the dirt excavated by the excavator accumulates below the shield, and the bucket g performs a scooping operation using a hydraulic jack h or the like, and the dirt is loaded onto a conveying device i such as a belt conveyor.

However, in the above-mentioned shield excavator, shear is loaded by the movement of the bucket g in the front-rear, left-right, and up-down directions;
Shear remains at the bottom, and the product cannot be completely loaded onto the transport device i. In addition, since there is a risk of interference between the bucket g and load header e, etc., excavation and loading cannot be carried out at the same time.During one operation, the other must be interrupted, making the work complicated and reducing work efficiency. Work efficiency is also low.

The present invention allows shear to be continuously and completely loaded onto a conveying device without interrupting excavation work,
This was done with the purpose of providing a shield excavator with improved work efficiency as well as improved work efficiency. A shear loading machine is provided with a plurality of buckets that can be rotated diagonally upward toward the target, bent in a direction parallel to the rotation plane, and rotated in a direction perpendicular to the rotation plane. It is characterized by this.

Embodiments of the present invention will be described below with reference to the drawings.

The shear loading machine 1 is as shown in FIG. Located at the front of the conveyance device 17 such as a belt conveyor,
As shown in FIG. 2, two units are arranged symmetrically with respect to the center of the conveying device 17, forming one set.
In addition, the shear loading machine 1, as shown in Fig. 3,
Even if the excavator main body 18 rotates at the maximum inclination angle θ and comes below the shield, it slopes downward toward the cutter 19 side so that it does not interfere with the shear loading machine 1 and can load shears smoothly. There is.

Details of an example of the shear loading machine 1 are shown in Figures 4 and 5.
To explain with a diagram, a shaft 3 whose axis line is inclined downward toward the cutter 19 is pivoted to a bracket 2 fixed at a predetermined position of the main body of the shield tunneling machine, and the shaft 3 can be rotated by a hydraulic jack 4. , a hydraulic jack that fixes brackets 5 and 6 to the front and rear ends of the shaft 3, pivots a proximal bucket belt 8 to the tip of the bracket 5 via a vertical pin 7, and swings the base bucket belt 8 in an oblique direction. The tip of the rod 9 is pivotally connected to a bracket 10 fixed to the middle part of the proximal bucket 8, and the middle part of the hydraulic jack 9 is pivotally connected to the bracket 6.

A tip bucket 12 is pivotally attached to the tip of the proximal bucket 8 via a vertical pin 11, and the rod tip of a hydraulic jack 13 that swings the tip bucket 12 diagonally in the same way as the proximal bucket 8 is connected to the tip of the tip bucket 12.
It is pivotally connected to a bracket 14 fixed to the rear end, and the rear end of the hydraulic jack 13 is connected to the base end bucket 8.
It is pivoted to a bracket 15 fixed to the rear end of the bucket, and a claw 16 is fixed to the tip of the tip bucket 12.

Next, the operation of the present invention will be explained.

In the case of normal shear loading work, the hydraulic jack 4 is stopped so that the shaft 3 does not rotate, and both the hydraulic jacks 9 and 13 move the rod to its maximum backward position. Therefore, the proximal bucket 8 and the distal bucket 1
2 is in a substantially straight line and is located at the position shown in FIG.

When the hydraulic jack 9 is operated in the direction in which the rod protrudes without operating the hydraulic jack 13, the proximal end bucket 8 and the distal end bucket 12 rotate integrally, and the tip of the claw 16 passes through the trajectory A, and the bucket 8 moves forward. ，
12 reaches the position. Next, the hydraulic jack 9 is stopped with the rod in its most protruding state, and when the hydraulic jack 13 is operated in the direction in which the rod protrudes, only the tip bucket 12 rotates, and the tip of the claw 16 passes through the trajectory R. The tip bucket 12 reaches the position of. By this operation, the shear is scraped up obliquely and loaded onto the conveyance device 17.

When retracting the bucket carts 8, 12 to their original positions, the rod of the hydraulic jack 9 is operated in the retracting direction while the rod of the hydraulic jack 13 is held in the most protruding state. Therefore, the tip end bucket 12 rotates integrally with the base end bucket 8 while being bent, and the tip of the claw 16 passes along the trajectory C.
The distal end bucket 12 reaches the position , and the proximal bucket 8 returns to its original position. When the proximal bucket cart 8 returns to its original position, the hydraulic jack 9 is not operated and the rod of the hydraulic jack 13 is moved backward. When the rod of the hydraulic jack 13 retreats by a predetermined amount, the tip of the claw 16 passes through the trajectory N, and the tip bucket 12 returns to its original position. Therefore, by repeating the above operations on both the left and right shear loading machines, the shear can be loaded onto the conveying device 17 smoothly and completely.

When the proximal bucket 8 and the distal bucket 12 are rotated in a straight line to the predetermined position as described above, when the proximal bucket 8 is stopped and the distal bucket 12 is rotated, the scraping area is increased by the proximal bucket 8. The proximal bucket 8 and the distal bucket 12 are rotated together with the distal bucket 12 bent, the proximal bucket 8 is returned to its original position and stopped, and then the distal bucket 12 is bent. By returning the bucket 12 until it is in a straight line with respect to the proximal bucket 8, the area of shear that the bucket can shed when returning to the bucket is reduced. For this reason, it is possible to efficiently load shedding.

When it is desired to scrape up shear at a higher position than the height of shear raised by the operation of the hydraulic jacks 9 and 13, the shaft 3 is rotated by operating the hydraulic jack 4 together with the operation of the hydraulic jacks 9 and 13. let As a result, the proximal end bucket 8 and the distal end bucket 12 are pulled toward the center of the conveying device 17 and rotated upward by the shaft 3, so that the displacement at a higher position can be scraped off.

Additionally, if gravel gets caught in the bucket during shear loading and exceeds the pressure set by the relief valve of the hydraulic jack 4, the shaft 3 automatically rotates, and the base bucket 8 and tip bucket 12 are rotated slightly upward. It can also be moved to release the bite.

FIG. 6 shows another embodiment of the present invention, in which an intermediate bucket 20 is provided between the proximal bucket 8 and the distal bucket 12.
This is an example of a system with . The base end bucket 8 and the intermediate bucket 20 are connected by a vertical pin 21, and the intermediate bucket 20 and the tip bucket 12 are connected by a vertical pin 22. Further, the intermediate bucket cart 20 is rotated by a hydraulic jack 23, and the tip bucket cart 12 is rotated by a hydraulic jack 24. In the figure, the same reference numerals as those shown in FIG. 4 indicate the same components.

When loading shedding, the buckets 8, 20, and 12 rotate integrally from the position to the position.
From the position to the position, the proximal bucket 8 stops, the buckets 12 and 20 rotate integrally,
From the position to the position ', the bucket is 8,20
stops, and only the tip bucket 12 rotates. The trajectory of the tip of the claw 16 is in the order of A, B, and B'.

To return the buckets 8, 20, and 12 to their original positions, move the buckets 8, 20, and 12 in a bent state to the integral position, stop the buckets 8, and then move the buckets 12, 20. The bucket cart 20 is moved integrally to the position ', and the bucket cart 20 is stopped, and the bucket cart 12 is moved to the position. This will completely return Bucket to its original position. Claw 16
The trajectory of is in the order of Ha, Ha′, and D.

Even in the case of this embodiment, buckets 8, 20, 12
The buckets 8, 20,
12 is rotated in a bent state and is spread out sequentially from the proximal side of the bucket to form a straight line, so that the splash area when returning the bucket is reduced, and therefore, shear can be loaded efficiently. Can be done.

Furthermore, if the shear is to be scraped up at a higher position than the shear scraping height caused by the actuation of the hydraulic jacks 9, 23, and 24, the hydraulic jack 4 is actuated to raise the shaft 3 as in the case shown in FIG. Rotate.

In the embodiments of the present invention, the bucket bucket has been described as having two or three stages, but it is possible to use any number of stages as long as there is a plurality of buckets, and various other changes may be made without departing from the gist of the present invention. Of course.

According to the shield excavator of the present invention, there is no risk of interference between the shear loading machine and the load header of the excavator, so it is possible to perform continuous excavation work and loading work without interrupting them. Therefore, workability is improved and work efficiency is improved. Moreover, since excavated shear can be completely discharged, the shield excavator main body can advance smoothly. In addition, the raking area when raking up shear with the bucket can be increased, increasing the amount of raking, and the area of raking when returning from the bucket can be made smaller, reducing the amount of debris being thrown away by returning to the bucket, making it possible to load shedding more efficiently. can be done.
Furthermore, since it is possible to easily scrape up gaps at high positions, work efficiency is further improved.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional shield excavator, Figure 2
The figure is a front view of the shear loading device of the shield tunneling machine of the present invention, and Figure 3 is a view taken in the direction of arrow A in Figure 2.
Fig. 4 is a view taken in the direction of arrow B in Fig. 3, Fig. 5 is a view taken in the direction of arrow C in Fig. 4, and Fig. 6 is an explanatory diagram of another example of the shear loading machine of the shield tunneling machine of the present invention. be. In the figure, 1 is a shear loading machine, 8 is a proximal bucket, 1
Reference numeral 2 indicates a tip bucket, 17 a conveyance device, and 20 a middle bucket.

Claims (1)

[Scope of utility model registration request] In front of the transport device for shear discharge disposed within the main body of the shield excavator, there is provided a rotation surface that can be rotated obliquely upward toward the transport device and can be bent in a direction parallel to the rotation surface. A shield excavator characterized by being provided with a shear loading machine equipped with a plurality of buckets that can rotate in a direction perpendicular to the shield.