JPH10181830A - Continuous belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a continuous belt conveyor to be used even in a pit with no transverse long space outside its entrance. SOLUTION: A continuous belt conveyor involves a longitudinal snubbing-belt storage device 28 which comprises a longitudinal support mount 20, a plurality of fixed pulleys 23 arranged at the upper side thereof, a plurality of vertically movable pulleys 27 arranged at the lower side thereof, and a belt 17 stretched between the fixed pulleys 23 and the movable pulleys 27 by several turns. The snubbing-belt storage device 28 thus arranged has a significantly shortened transverse length to save its transverse installation space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous belt conveyor which is used when, for example, a waste excavated by a tunnel excavator is continuously carried out from a face to an outside of a mine.

[0002]

2. Description of the Related Art As shown in FIG. 3, a belt 3 is wound around a tail pool 1 and a snub pulley 2, and a stretching belt storage device 4 is provided in the middle of the belt 3, and a tail pulley 1 is provided.
4, a continuous belt conveyor is known in which a moving belt pulley 6 of a stretching belt storage device 4 approaches when a movable belt puller 6 moves together with a tunnel excavator 5 as shown in FIG. .

According to the continuous belt conveyor, the waste excavated by the tunnel excavator 5 can be continuously carried out from the face 7 to the outside of the pit 8.

[0004]

In such a continuous belt conveyor, the stretching belt storage device 4 is provided substantially horizontally between the tail pulley 1 and the snub pulley 2 so that the stretching belt storage device 4 is substantially belt stretched. The length in the lateral direction is obtained by dividing the length by the number of steps of the pulley (or the number of times the belt is folded). For this reason, since the horizontal installation space of the stretching belt storage device 4 is long, a horizontal installation space longer than the length L of the stretching belt storage device 4 is required outside the towing port 9 of the pit 8.

[0005] For this reason, when there is no long space in the lateral direction outside of the towing port 9 of the pit 8, or when the cross-sectional area of the pit 8 is not large enough to install the stretching belt storage device 4 inside the pit 8, Cannot use a continuous belt conveyor. For example, when excavating a horizontal tunnel from a shaft, a stretching belt storage device 4 cannot be installed in the shaft, so that a continuous belt conveyor cannot be used.

Accordingly, an object of the present invention is to provide a continuous belt conveyor capable of solving the above-mentioned problems.

[0007]

The first aspect of the present invention provides
A longitudinal pulling belt storage device 28 having a plurality of pulleys facing each other at a predetermined distance in a vertical direction and having a pulley above or below the tail pulley 10, a snub pulley 11, and capable of moving a pulley above or below the pulley 11 vertically. A belt wound around each of the pulleys, and the tail pulley 10 is moved so that the pulley of the stretching belt storage device 28 moves up and down so that the belt 17 is stretched. Continuous belt conveyor.

According to the first aspect, the extension length of the belt 17 is determined by the vertical distance between the upper pulley and the lower pulley. 28 has a significantly shorter lateral length.

As a result, the space for installing the stretching belt devices 28 in the horizontal direction is reduced, and a continuous belt conveyor can be used even when there is no space long in the horizontal direction outside of the towing port of the horizontal shaft. For example, when excavating a horizontal shaft from a shaft, a continuous belt conveyor can be used by installing the stretching belt storage device 28 in the shaft.

The second invention is a continuous belt conveyor in which the lower pulley in the stretched-length belt storage device 28 of the first invention is vertically movable.

According to the second aspect, since the lower pulley attempts to move downward by its own weight, tension can be applied to the belt 17 by the lower pulley. This allows the use of the own weight of the pulley, thereby simplifying the device for applying tension.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a plurality of carrier rollers 12 are provided between a tail pulley 10 and a snub pulley 11 at intervals. Snub pulley 11
1st, 2nd, 3rd idler pulleys 13, 1
A plurality of return rollers 16 are provided between the third idler pulley 15 and the tail pulley 10 at intervals. These pulleys and rollers are mounted on a frame (not shown), and a belt 17 is stretched over them.

A vertically long support base 20 is provided closer to the rear than the third idler pulley 15. This support base 20
A head pulley 22 which is driven to rotate by a belt driving device 21 is provided at the upper part of the head. A plurality of fixed-side pulleys 23 are attached to the upper part of the support gantry 20 at intervals in the vertical direction, and a fixed-side vertical guide 24 is attached to the lower part of the support gantry 20. A movable pulley support 25 is provided along the fixed vertical guide 24 via a movable guide 26 so as to be vertically movable.

A plurality of movable pulleys 27 are mounted on the movable pulley support 25 at intervals in the vertical direction.
The belt 17 is moved from the head pulley 22 to the movable pulley 2.
7, after being sequentially wound around the fixed pulley 23, the movable pulley 27, and the fixed pulley 23, the third idler pulley 15
It is wound around. Thereby, the belt storage device for stretching 2
8.

The movable pulley support 25 is urged downward by urging means, for example, a weight 29. The urging means may be a spring, a winch, a hydraulic cylinder, or the like.

The tail pulley 10 moves forward together with a tunnel excavator (not shown) in the pit 30, and the excavated slip is moved by the loading chute 31 to the belt 1.
7 is dropped toward the tail pulley 10.

The snub pulley 11 and the first, second, and third idler pulleys 13, 14, and 15 are connected to the
2, a discharge sheet 33 is provided below the snub pulley 11. The discharge chute 33 is provided so as to cross the belt 17, and feeds a slip mounted on the belt 17 to an adjacent discharge chute 33 and discharges the same.

Next, the operation of the stretching belt storage device 28 will be described. The belt 17 has a length necessary for the movement of the tail pulley 10 because the belt 17 is folded and wound a plurality of times between the fixed pulley 23 and the movable pulley 27.

Since the movable pulley support 25 is urged to move downward by its own weight, the weight of the movable pulley 27, and the weight 29, a required tension is applied to the belt 17.

Due to the weight 29, the movable pulley support 25
The force for urging the belt downward is (the required tension of the belt 17) ×
(Number of times the belt 17 is folded back) -Movable pulley support 25
Is its own weight.

When the tail pulley 10 moves forward together with the tunnel excavator, the belt 17 is pulled by a large force, so that the movable pulley support 25 moves upward, and the movable pulley 27 approaches the fixed pulley 23. Stretch automatically.

As described above, when the tail pulley 10 moves forward by a predetermined distance, a new frame provided with a return roller 16 is attached to the front of the frame, and when the tail pulley 10 moves along this frame, the carrier roller 1
2 is sequentially mounted on a new frame.

FIG. 2 shows an embodiment in which the shaft 30 is excavated from the shaft 40 in a horizontal direction. The basic configuration is the same as that of FIG. 1, except that the support base 20 of the stretching belt storage device 28 is a pit wall 41 of a shaft 40.

Specifically, an upper stay 42, a fixed pulley support 43, and a fixed-side vertical guide 24 are mounted on a pit wall 41,
The belt driving device 21 is mounted on the upper stay 42, and the fixed pulley 23 is mounted on the fixed pulley support 43.

In this way, the extension belt storage device 28 can be installed by effectively utilizing the space in the shaft 40. In addition, in FIG.
4 is attached.

[Brief description of the drawings]

FIG. 1 is a front view of a continuous belt conveyor according to a first embodiment of the present invention.

FIG. 2 is a front view of a continuous belt conveyor according to a second embodiment of the present invention.

FIG. 3 is a front view of a conventional continuous belt conveyor.

FIG. 4 is a front view of the belt in a stretched state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tail pulley 2 ... Snub pulley 3 ... Belt 4 ... Stretched long belt storage device 8 ... Tun 9 ... Tobaguchi 10 ... Tail pulley 11 ... Snub pulley 17 ... Belt 23 ... Fixed side pulley 27 ... Movable side pulley 28 ... Stretching belt storage device 29 ... weight 40 ... shaft 41 ... pit wall

Claims (2)

[Claims] 1. A tail pulley (10), a snub pulley (11), and a plurality of pulleys facing each other at a predetermined distance in a vertical direction, and a pulley above or below the pulley is movable in a vertical direction. A vertically extending belt storage device (28) and a belt (1) wound around each of the pulleys.
7) wherein the tail pulley (10) moves so that the pulley of the stretching belt storage device (28) moves up and down to stretch the belt (17). Conveyor. 2. The extended belt storage device according to claim 1, wherein
8) A continuous belt conveyor in which the lower pulley can be moved vertically.