JP2860749B2 - Screw conveyor equipment of shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a screw conveyor device for carrying excavated earth and sand disposed in a shield excavator.

[0002]

2. Description of the Related Art A screw conveyor is provided between a front body and a rear body of a shield excavator, which are connected to each other so as to be freely bent, and a front end of the screw conveyor is supported by being inserted into a partition wall stretched on the front body. The opening end faces the sediment intake chamber provided on the back side of the cutter head of the excavator, and the excavated sediment in the sediment intake chamber is taken in and transported to the rear sediment transport vehicle. When the front fuselage is bent by the operation of the direction correcting jack with respect to the rear fuselage, the rear part of the screw conveyor moves relatively in the rear fuselage in the direction opposite to the refraction direction of the front fuselage, and the earth and sand transport vehicle waits. It will disturb the loading of earth and sand from the position.

For this reason, for example, Japanese Utility Model Publication No. 2-27037
As described in the publication, the front end of the screw conveyor is supported so that it can be freely bent up and down and left and right of the partition wall of the shield excavator, and the rear part is supported by a support frame installed in the rear part, and the direction due to the bending of the front trunk Despite the correction,
A screw conveyor device has been devised in which the rear part of the screw conveyor is always supported on a fixed height position of the rear trunk.

[0004]

However, when the above-described support base is installed below the rear body of the shield excavator, the work space may be narrowed and the work efficiency may be reduced. Since the rear end of the conveyor is always supported at a constant height, when assembling the segments in the rear body in the circumferential direction, the assembling work space becomes narrow over the entire circumference and the In some cases, the assembly work was hindered. An object of the present invention is to provide a screw conveyor device of a shield excavator capable of completely solving such a problem.

[0005]

In order to achieve the above-mentioned object, a screw conveyor device of a shield excavator according to the present invention has a cutter head rotatably disposed at a front end thereof and a cutter head at a rear portion of the cutter head. A front body having a partition wall and a space between the partition wall and the cutter head formed in an excavated sediment intake chamber, and a rear body having a front end portion connected to the rear end of the front body so as to be freely bent. In a shielded excavator having
The opening front end of the screw conveyor is flexibly supported by the partition wall, the opening end faces the excavated sediment intake chamber, and the rear part of the screw conveyor is connected to the upper peripheral inner surface of the rear trunk. It has a structure in which at least two jacks hang freely and vertically.

[0006]

With this configuration, even if the front trunk is bent in a predetermined direction with respect to the rear trunk to control the excavation direction, the rear end of the screw conveyor is always adjusted to the earth and sand carrier by adjusting the expansion and contraction of the jack. Not only can it be located at the loading location, but also, for example, when assembling the segments in the rear trunk, the rear of the screw conveyor is moved up and down and left and right in the rear trunk by actuation of the jack to reduce the working space in the segment assembly site. It can be gradually widened.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Reference numeral 1 denotes a shield excavator, a front body 1a having a cutter head 3 rotated by a motor 2 at a front end opening thereof, and a front body 1a having a front end connected to the rear end of the front body 1a so as to be freely bent. A first rear body 1b and a second rear body 1c having a front end slidably connected in a longitudinal direction to a rear end of the first rear body 1b. A partition 4 that rotatably supports the cutter head 3 is stretched inside the body 1a, and a space between the cutter head 3 and the partition 4 is formed in a digging and sediment intake chamber 5. Note that the second rear trunk 1b is not necessarily provided, and the trunk of the shield excavator 1 may be formed by the front and rear trunks 1a and 1c.

Reference numeral 6 denotes a screw conveyor arranged in the machine from the front trunk 1a to the rear trunk 1b. The screw conveyor 6 has a screw 6b which is rotated by the drive of a motor 7 installed at the rear end in the cylindrical trunk 6a. The front end of which is a shield excavator 1
Is supported at the lower part of the partition wall 4 through a centering bearing 10 so as to be able to freely bend up, down, left and right. 6c
Is provided. Furthermore, the cylinder of this screw conveyor 6
The rear portion of 6a is suspended and supported by two jacks 8, 9 connected and supported to the inner surface of the upper peripheral portion of the second rear trunk 1c. The screw conveyer 6 constitutes a screw conveyer device that can freely move up, down, left and right.

In the two jacks 8, 9, one of the jacks 8 is swingably supported by a support member 11 having the upper end of the cylinder portion fixed to the inner surface of the upper peripheral portion of the second rear barrel 1c. The lower end of the rod 8a is pivotally connected 12 to the rear upper peripheral surface of the screw conveyor 6 to move the screw conveyor 6 in the vertical direction about the centering bearing 10 by the operation of the jack 8. After the upper end of the cylinder portion of the other jack 9 is displaced in the circumferential direction from the mounting position of the one jack 8, the other jack 9 is swingably connected to and supported by the upper portion of the side of the body 1c at an angle. , The lower end of the rod 9a is pivotally connected 13 to the upper portion of the rear side surface of the screw conveyor 6 to move the screw conveyor 6 in the left-right direction about the above-mentioned centering bearing 10 by the operation of the jack 9. A.

Accordingly, the operation of the jacks 8 and 9 allows the screw conveyor 6 to move up, down, left and right around the centering bearing 10. In addition, as a jack which performs the swing movement of this screw conveyor 6,
At least the above two jacks are required, and it may be configured to use more jacks.

Numeral 14 designates direction correcting jacks arranged on all sides of the inner peripheral surface of the front trunk 1a, the front end of which is connected to the rear side of the partition wall of the front trunk 1a, and the rear end of the rod is connected to the inner periphery of the first rear trunk 1b. The support member 16 fixed to the front part of the
By the operation described above, the front trunk 1a is refracted by the first rear trunk 1b in a desired direction. Similarly, telescopic jacks 15 are arranged on the four sides of the inner peripheral surface of the first rear trunk 1b, and the front ends thereof are connected to the supporting members 16a.
On the other hand, the rear end of the rod is connected to a support member 11 fixed to the inner peripheral surface of the second rear trunk 1c, and the rod of the jack 15 is extended and contracted to thereby move the first rear trunk 1b to the second rear trunk 1c. Is configured to extend and contract in the length direction with respect to. 17
Is a propulsion jack mounted at a plurality of locations on the inner peripheral surface of the second rear barrel 1c.
The shield excavator 1 is propelled by the reaction force against the segment 19 assembled therein.

With the above construction, the ground is excavated by rotating the cutter head 3 together with the propulsion of the shield excavator 1, and the excavated soil enters the intake chamber 5 and protrudes into the intake chamber 5. Screw of screw conveyor 6
It is conveyed rearward in the cylinder 6a by 6b, and is fed into the earth and sand transport vehicle 20 waiting from the discharge port 6c. In this way, when the shield excavator 1 is to be corrected in a predetermined excavation direction while the tunnel is being excavated by the shield excavator 1, the direction correcting jack is required.
14 is operated to bend the front body 1a by a predetermined angle with respect to the first rear body 1b.

At this time, the screw conveyor 6 has its cylindrical body
Since the front end of 6a is supported by a centering bearing 10 attached to the partition wall 4 with respect to the front trunk 1a so as to be vertically and horizontally rotatable, and the rear part is suspended by jacks 8, 9, The discharge port 6c is maintained in a fixed state at the earth and sand input position with respect to the earth and sand carrier 20 only by rotating relatively to the front trunk 1a.

When carrying large equipment or the like into the shield excavator 1 through the segment lining, if it is desired to widen one side or the lower part of the screw conveyor 6, the jacks 8, 9 are operated. The carry-in space is expanded by tilting the screw conveyor 6 upward around the centering bearing 10 or moving the screw conveyor 6 to the other side. Similarly, when assembling the segments in the circumferential direction in the rear trunk 1c, the two jacks 8,
By moving the rear part of the screw conveyor 6 in the direction opposite to the segment assembling section by operating the step 9, the working space can be widened.

[0015]

As described above, according to the screw conveyor device of the shield excavator of the present invention, the front end of the screw conveyor disposed in the shield excavator can be freely moved up, down, left and right on the partition wall of the front trunk of the shield excavator. Because it is supported and suspended by at least two jacks connected to the inner surface of the upper periphery of the rear trunk, the rear part is connected to the front trunk so as to be able to bend freely, the excavation direction of the shield excavator is controlled. Even if the front trunk is bent in a predetermined direction with respect to the rear trunk, the rear end of the screw conveyor does not move to the inner side of the rear trunk, and it is always positioned at the loading place on the earth and sand transport vehicle by adjusting the expansion and contraction of the jack. Of course, the screw conveyor is suspended from above by a jack. Absent, therefore, it is capable of forming a wide space portion downward screw conveyor, in which smoothly perform the work of loading operations of various equipment.

Further, when assembling the segments in the rear body in the circumferential direction, the jack can be operated to move the rear portion of the screw conveyor away from the assembling side, thereby increasing the working space and increasing the efficiency. You can work well.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a shield excavator equipped with a screw conveyor device,

FIG. 2 is a longitudinal sectional view taken along line AA.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield excavator 1a Front trunk 1b, 1c Rear trunk 4 Partition wall 5 Sediment intake room 6 Screw conveyor 8, 9 Jack

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/12

Claims (1)

(57) [Claims] 1. A cutter head is rotatably arranged at a front end and a partition wall is provided at a rear portion of the cutter head, and a space between the partition wall and the cutter head is formed in an excavated sediment intake chamber. A front excavator, and a rear excavator having a front end connected to the rear end of the front torsion so that the front end can be freely bent. The end of the screw conveyor is exposed to the excavated sediment intake chamber, and the rear part of the screw conveyor is suspended by at least two jacks connected to the inner surface of the upper periphery of the rear trunk so as to be movable vertically and horizontally. Screw excavator screw conveyor equipment.