JP2002114379A - Maintenance equipment of due-out machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To previously surely detect a contact of a pile with a boom when the boom goes over a designated due-out advance distance. SOLUTION: In a due-out machine 1, a scraper 11 is provided on the tip of the boom 6 projected from a base 4, and bulk material scraped from the pile 30 by the scraper 11 is transported to a hopper 14 disposed in the base 4 by a boom belt conveyer 9 disposed in the boom 6. In this maintenance equipment attached to the above due-out machine, a limit switch 21 for detecting a contact of a wire rope 20 stretched along the boom 6 and urgently stopping the movement of the boom 6 for previously detecting a contact of the stack 30 with the boom 6 is provided below both outsides of the boom 6, and a pair of tilt switches 26 for detecting a contact with the pile 30 and urgently stopping the movement of the boom 6 are suspended below both outsides of the boom 6 in front of the wire rope 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispensing machine (reclaimer) used when unloading bulk materials such as coal and ore loaded in a storage and a maintenance facility attached to a stacker / reclaimer. .

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, bulk materials 50 such as coal and ore carried by a ship, a freight car, a conveyor or the like are piled up in a storage area 51 by a stacker (not shown) as a pile 52. It is stored and then continuously carried out by a payout machine 53 or a stacker / reclaimer.

[0003] This known dispensing machine 53 is a scraper 56 made of a bucket wheel at the tip of a boom 55 that is pivotally protruded from a base 54 that can travel in the front-rear direction shown in the figure.
The traveling, turning, and undulating movement of the boom 55, the scraps 50 stacked by the scraper 56 are sequentially scraped from the upper stage of the pile 52 by, for example, a bench cut method, and the boom conveyor disposed in the boom 55 is provided. Base 5 by 57
Then, the sheet is conveyed to a hopper 58 disposed at the position 4, and further discharged to a belt conveyor 59 disposed below the hopper 58.

[0004] The boom 55 of such a dispensing machine 53 includes:
A maintenance facility for detecting in advance the contact between the pile 52 and the belt conveyor frame 55a and preventing damage to the machine due to the contact in advance is provided. FIG. 6 shows a conventional maintenance facility attached to the boom 55 of the dispensing machine 53. This equipment includes a wire rope 6 attached below the boom 55.
0, the wire ropes 60, 60 stretched in parallel in the front-rear direction of the boom 55 along both outer lower sides of the boom 55 by the attachment frames 63, 63;
60, a limit switch 61 that operates by detecting contact of
61 and a wire rope type contact prevention device S. Accordingly, when the belt conveyor frame 55a of the moving boom 55 is likely to come into contact with the pile 52,
When the wire rope 60 comes into contact with the pile 52 in advance, the limit switch 61 operates to stop the operation of the boom 55 and prevent the boom 55 from being damaged.

[0005]

However, in the maintenance equipment using the wire rope type contact prevention device S described above,
For the downward contact when the boom 55 is lowered and the lateral contact when the boom 55 is turning at a horizontal or downward angle, the wire rope 60 reliably detects the contact in advance and activates the limit switch 61 effectively. As shown schematically in the figure, in the case of the upper pile delivery in which the boom 55 is raised with the elevation angle, when the upper pile 52a is paid out for a certain distance L, the wire rope 60 cannot detect the contact and the limit switch 61 is activated. With a delay, the lower surface of the belt conveyor frame 55a may come into contact with the upper edge 62 of the lower pile 52b.

[0006] Naturally, the advance distance L of the boom 55 to the upper pile 52a is set in advance.
When the boom 55 advances beyond the advance distance L due to an erroneous operation, failure, or the like, the wire rope type contact prevention device S attaches the wire rope mounting frame to the position of the belt conveyor frame 55a where it is most likely to make contact when dispensing the upper stack. The configuration in which the position 63 is located makes the contact detection by the contact wire rope 60 uncertain in the forward movement at the time of discharging the upper stack.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and when the boom exceeds a predetermined payout advance distance, the contact between the pile and the belt conveyor frame of the boom is reliably detected to prevent a contact accident. It is in.

[0008]

According to the present invention, a scraping machine is provided at the tip of a boom protruding from a base, and bulk materials scraped from a pile by the scraping machine are disposed in the boom. In a maintenance facility attached to a dispensing machine that conveys to a hopper arranged on the base by a boom belt conveyor, the boom belt conveyor moves along the boom in order to detect in advance the contact between the pile and the boom below both outer sides of the boom. A limit switch for detecting the contact of the wire rope stretched and emergency stop of the movement of the boom is provided,
A pair of tilt switches for detecting contact with the pile and urgently stopping the movement of the boom are suspended below both outer sides of the boom in front of the wire rope.

With this arrangement, when the boom moves forward by moving beyond the preset advance distance of the boom to the upper pile, the tilt switch comes into contact with the vicinity of the upper end edge of the lower pile, and the boom comes into contact with the pile. Make sure to emergency stop the boom movement before doing so.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a payout machine maintenance facility according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an outline of a dispensing machine to which the maintenance equipment of the dispensing machine of the present invention is mounted. The entire structure of the dispensing machine 1 is almost the same as that of the conventional example, and is formed to face each other. Between the two storages 40 and 41, a rail 3 having a conveyor belt conveyor 2 disposed at the center is extended in the front-rear direction shown in the drawing. I have.

A long boom 6 is mounted on the base 4 via a turning device 5 at a base end 7 thereof so as to be vertically rotatable. The boom 6 has a boom belt conveyor 9 housed therein from the front end 8 to the base end 7 and the base end 7 is expanded and contracted by the cylinder 10 of the base 4.
It is possible to undulate around the center.

As shown in FIG. 2, a bucket wheel 13 having an auxiliary conveyor 12 is provided at the tip of the boom 6.
Is provided, and the bulk material scraped from the pile 30 by the bucket wheel 13 is transported by the boom belt conveyor 9 via the auxiliary conveyor 12 to the hopper 14 installed on the base 4, and further It is carried out to the conveyor belt conveyor 2 arranged below.

Further, similarly to the above-described conventional example, the boom 6 is provided along the boom 6 in front of the boom 6 below both sides of the boom 6 in order to detect in advance the contact between the pile 30 and the moving boom 6. A wire rope type contact prevention device S is provided which includes wire ropes 20 and 20 stretched in parallel from the part to the rear part and a limit switch 21 which operates by detecting contact of the wire rope 20 with the pile. .

The wire ropes 20, 20 in this wire rope type contact prevention device S are fixed by projecting both ends from both sides of the belt conveyor frame 15 at a distance back and forth below the belt conveyor frame 15. Since the rope is attached to both ends of the attachment frames 22, 22, the contact with the pile 30 in the turning direction when the boom 6 at the horizontal or downward angle is turned is detected in a wide range in the length direction of the boom. As much as possible, the contact between the boom 6 and the pile 30 below the boom 6 when the boom 6 is lowered is reliably detected. Therefore, the limit switch 21
Is activated to stop the movement of the boom 6 to prevent a contact accident of the boom 6 in advance.

Further, the boom 6 has a wire rope 20 at the lower side on both outer sides of the boom conveyor frame 15.
As shown in FIGS. 3 and 4, a pair of rod-shaped tilt switches 26, 26 that operate by detecting contact with the pile 30 are suspended from the front portion. A tilt switch 26 incorporating this sensor is suspended from a lower end of a wire rope 25 to which a stabilizing weight 27 is attached, and a cable 28 for transmitting a contact signal is connected to a control box (not shown). The contact is detected by tilting at a predetermined angle.

As shown in FIG. 3, the interval between the two tilt switches 26, 26 is parallel to the wire rope 20,
The interval is set wider than 20 and the tilt switch 2
The tips of the wires 6 and 26 are set at the same positions as the positions of the wire ropes 25 and 25. The position of the lower surface of the boom conveyor frame 15 orthogonal to the two points connecting the tilt switches 26, 26 is such that when the upper stack 31 is dispensed, the lower stack 32
Is the position where the uppermost edge 33 is most easily contacted.
At the time of one payout, the tilt switches 26, 26 detect the contact earlier than the wire ropes 20, 20.

The maintenance equipment of the dispenser according to the present embodiment is configured as described above. When the dispenser 1 dispenses bulk materials from the pile 30, the boom 6 is moved, turned, raised and lowered, and scraped. For example, in the bench cut method, the scraper 11 sequentially scrapes out the upper pile 31 of the pile, and the bucket wheel 1
The scraps scraped by 3 are discharged from the auxiliary conveyor 12 via the boom belt conveyor 9.

When paying out the upper pile 31, the boom 6 is swung forward with the boom 6 at an elevation angle. When paying out the upper pile 31 at the preset forward distance L, the belt conveyor frame 15 is orthogonal to the two points connecting the two tilt switches.
Is closest to the upper edge 62 of the lower pile 32.

If the boom 6 moves forward over the forward distance L for any reason such as malfunction, malfunction or failure of the dispensing machine 1 while the upper pile 31 is being dispensed, the tilt switch 26 moves the upper edge 62 of the lower pile 32. Contact nearby.

Tilt switch 2 by contact with pile 30
The tilt switch 26 is immediately activated by the displacement of the boom 6 to stop the boom 6 immediately, thereby avoiding a contact accident of the boom 6.

In the dispensing of the lower pile 32, the boom 6 turns horizontally or at a depression angle, so that the position of the tilt switch 26 does not contact higher than the wheel excavation surface. No extensive lateral contact occurs. The downward contact of the boom 6 when it is lowered is detected by the wire rope type contact prevention device S.

Needless to say, the maintenance equipment for the dispenser using the tilt switch 26 and the wire rope type contact prevention device S is used not only for a reclaimer but also for a stacker / reclaimer.

[0024]

The present invention is embodied in the form described above and has the following effects.

[0025] A pair of tilt switches for detecting contact with the pile and urgently stopping the movement of the boom are hung below both outer sides of the boom in front of the wire rope type contact prevention device. When the boom exceeds the forward distance to the upper pile, the tilt switch reliably detects the contact with the lower pile in advance. Therefore, the movement of the boom can be stopped urgently before the boom comes into contact with the pile to ensure the safety of the machine.

Further, the maintenance equipment provided on the boom comprising the tilt switch and the wire rope type contact prevention device is a means for mechanically detecting the contact, so that it is used as a backup for a failure of the software control means. This is useful as a fail-safe function of the dispenser.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a dispenser according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a main part in the embodiment of FIG. 1;

FIG. 3 is an explanatory diagram showing the direction of arrow A in FIG. 2;

FIG. 4 is an enlarged front view of a tilt switch in the explanatory diagram of FIG. 3;

FIG. 5 is a schematic side view of a dispensing machine showing a conventional maintenance apparatus for the dispensing machine.

6 (a) is a side view and FIG. 6 (b) is a plan view of maintenance equipment used for the dispensing machine of FIG.

FIG. 7 is an enlarged schematic side view illustrating a use state of the maintenance equipment of the dispensing machine of FIG. 5;

[Explanation of symbols]

1 Dispenser, 4 bases, 6 booms, 9 boom belt conveyor, 11 scraper, 14 hopper, 20 wire rope, 21 limit switch, 26 tilt switch, 30 pile,

Claims (1)

[Claims] 1. A scraping machine is provided at a tip of a boom protruding from a base, and the base material is scraped from a pile by the scraping machine and the base is moved by a boom belt conveyor disposed in the boom. In the maintenance equipment attached to the dispensing machine to be transported to the hopper arranged in the hopper, a wire rope stretched along the boom to detect in advance the contact between the pile and the boom on both outer lower sides of the boom. A limit switch for detecting the contact and urgently stopping the movement of the boom is provided, and detecting the contact with the pile at both outer lower sides of the boom in front of the wire rope and urgently stopping the movement of the boom. A maintenance device for a dispenser, wherein a pair of tilt switches are suspended.