JP3399090B2 - Continuous unloader - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous unloader, and more particularly, to a continuous unloader in which a sling wire for hanging a bulldozer is wound around a scraping portion and is attached so as to be able to be fed out. It is about. 2. Description of the Related Art In general, a continuous unloader is used as an apparatus for unloading loaded bulk materials (coal, ore, etc.) from a hold. As shown in FIG. 6, the continuous unloader has a traveling section 2 provided on a quay (pier) 1 for loading and unloading a load, and the traveling section 2 is provided so as to be able to turn on a horizontal plane. A boom 3 which is provided to be capable of raising and lowering; a top support frame 4 which is provided at the tip of the boom 3; and a cylindrical elevator which is rotatably supported by the top support frame 4 and is vertically suspended. It mainly comprises a casing 5 and a bucket chain conveyor 7 having an elevator part 6a disposed along the elevator casing 5 along the same and a scraping part 6b extending horizontally from the lower end of the elevator part 6a. Have been. As shown in FIG. 7, the bucket chain conveyor 7 has a driving sprocket 8 at the top of the elevator casing 5, and a driven sprocket 9 at the distal end and the proximal end of the scraping portion 6b. , 10. Further, in order to form a part protruding from the lower end of the elevator part 6a into a shoe-shaped scraping part 6b, the elevator part 6a
A support frame (floater) 11 is provided from the lower end to the base end of the scraping section 6b. A first cylinder 12 extends between the upper portion of the support frame 11 on the elevator section 6a side and the lower end of the elevator casing 5 so that the support frame 11 can be suspended. A second cylinder 13 is interposed between the tip of the support frame 11 on the side of the scraping portion 6b and the driven sprocket 9 to drive the driven sprocket 9 to expand and contract along the longitudinal direction of the scraping portion 6b. Has been established. Further, a chain 14 is wound endlessly between the driving sprocket 8 and the driven sprockets 9 and 10, and buckets 15 are attached to the chain 14 at appropriate intervals along the chain. Therefore, the chain 14 bridged between the driven sprockets 9 and 10 is stretched by one or both of the first cylinder 12 and the second cylinder 13.
When the bucket sprocket 8 is operated to rotate the bucket chain conveyor 7 together with the elevator casing 5 while circulating and transporting the chain 14 and the bucket 15, as shown in FIG. While being scraped off by the bucket 15 at the position of the take-up section 6b, it is carried into the elevator section 6a, and is dropped onto the conveyor 17 of the boom 3 from the carry-out end of the elevator section 6a. Therefore, if the bulk material dropped from the discharge end is configured to be transferred from the conveyor 17 to the conveyor 18 of the traveling unit 2, the bulk material can be continuously landed on the quay 1. The length of the first cylinder 12 shown in FIG. 7 is adjusted during scraping of
By changing the length of the scraper 3 and changing the overhang length of the scraping section 6b and the elevation angle of the scraping section 6b, the range of scraping of the scraping section 6b can be expanded, and bulk materials at the corners of the hold 16 which are difficult to scrape can be obtained. Can also be scraped. [0007] However, the operation of the first cylinder 12 and the second cylinder 13 naturally has a certain limit, and it is difficult to scrape all without leaving loose objects. For this reason, conventionally, once the scraping of the bulk material by the scraping section 6b is stopped, the scraping section 6b is taken out to the quay 1 and, as shown in FIG.
b, the bulldozer 19 is suspended from the
b, lowering it into the hold 16, bringing the bulk of the corner of the hold 16 to the center by the bulldozer 19, and then restarting the scraping by the scraping unit 6 b to scrape all the bulk from the hold 16. (Hereinafter referred to as "the bottom"). However, as shown in FIGS. 8 and 9, when the scraping is interrupted and resumed, in addition to the operator's operations such as turning and lowering the boom 3, the scraping is performed. The lowering portion 6b is lowered near the ground on the quay 1 and a shackle 25 is attached to the eye of the heavy and thick sling wire 20.
2 It is necessary to attach to the hanging metal fittings 23 at both ends. After the attachment of the sling wire 20, the scraping portion 6b is raised and swung to bring the lower end of the sling wire 20 to the vicinity of the hanging ear 21 of the bulldozer 19. To the lower end of each sling wire 20 and the lug 2 of the bulldozer 19.
1 is connected with another shackle 24, and immediately after the bulldozer 19 is suspended in the hold 16, the scraper 6b and the bulldozer 1
It is necessary to remove the sling wire 20 together with the shackles 24 and 25 from the hanging ears 21 and move the sling wire 20 to a place where there is no hindrance of the bruise 19, and it is necessary to remove approximately 40 to 40 mm by the time these operations are completed. 45
(For example, in the case of using a large-capacity continuous unloader with a payout amount of 3000 t / h class, if the scraping is interrupted for 30 minutes, there is a problem).
The scraping of the 500t bulk material becomes impossible. ). Also, the work of manually attaching, removing, and transporting a heavy and thick sling wire is dangerous, and there is also a problem in safety. An object of the present invention is to provide a continuous unloader in which a sling wire is attached to a scraping portion so that the sling wire can be wound up and out. In order to achieve the above object, the present invention provides a sprocket having two horizontally spaced sprockets for forming a lower portion of a bucket elevator into a shoe-like scraping portion.
In a continuous unloader provided with a support frame for supporting the sprocket between these sprockets,
A hydraulic motor provided on a support frame with a drive shaft protruding outward from a side surface thereof, a drum integrally provided on the drive shaft, and a drum for winding two sling wires for hanging a bulldozer around the drum in parallel A flange integrally provided at a central portion, a first wire mounting portion provided to mount one sling wire on one surface of the flange, and a 180 ° interval from the first wire mounting portion on the opposite surface of the flange. And a second wire attaching portion provided to attach the other sling wire to the drum. By rotating the hydraulic motor forward, two sling wires are wound around the drum, and by rotating the hydraulic motor in the reverse direction, the sling wire is removed from the drum. It is configured to be able to connect the leading end mounting portion to each suspension portion of the bulldozer after the main feeding. When suspending the bulldozer at the scraping section to loosen the bottom of the loose object, the hydraulic motor is rotated forward, and the two sling wires of the drum are fed vertically downward.
The tip attachments of each sling wire are respectively connected to the suspension ears of the bulldozer. After the connection, the scraping part is raised for hanging the bulldozer in the hold. At this time, rotational force in opposite directions is applied to the flange, drum and hydraulic motor due to the weight of the bulldozer applied to the sling wire, but the torque of the hydraulic motor is sufficiently small compared to the weight of the bulldozer. Means to rotate to the position where the clockwise and counterclockwise couples balance and stop. Therefore, even if the bulldozer is lifted by raising the scraper, the drum,
The bending moment in the drum rotation direction does not act on the flange, the drive shaft of the hydraulic motor, and the bearing. After the bulldozer has been lifted to a predetermined height, the scraper is swiveled right above the hold, the scraper is lowered, the bulldozer is lowered to the floor of the hold, and the end of each sling wire is pulled from the bulldozer's hanging ear. , And the respective sling wires are wound around the drum by reversing the hydraulic motor. A preferred embodiment of a continuous unloader according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the same or similar components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIGS. 1 and 2, the support frame 11 of the continuous unloader has a right side and a left side.
A hydraulic motor 26 is attached so that the front part projects outward from the side surface of the support frame 11, and pulleys (sheaves) 27 are attached to the front and rear of the hydraulic motor 26 to support the sling wire 20 so as to be rotatable. I have. A drum 29 for winding or unwinding the sling wire 20 is attached to the drive shaft 28 of the hydraulic motor 26 as shown in FIG. Both ends of the drum 29 are provided with the sling wire 2
A flange 32 and a flange 31 are provided to prevent the 0 from coming off, and a flange 32 is attached to the center of the drum 29 so that the sling wire 20 can be wound up in parallel. . In addition, the drum 29 has a central brim 3
The first bracket 33 is provided so as to be appropriately separated from one surface of the second member 2 toward the flange 30, and at a position appropriately separated from the surface opposite to the central flange 32 toward the flange 31, and At a position 180 ° apart in the circumferential direction,
A second bracket 34 is provided. The first bracket 33 and the second bracket 34 are provided so as to extend radially outward from the outer peripheral surface of the drum 29, and have a hole 36 in the center of the leading end for passing a bolt 35 in the thickness direction. are doing. The central flange 32 is provided with a screw hole 37 for screwing the bolt 32 inserted into the hole 36 of the first bracket 33 and the second bracket 34. Needless to say, these holes 36 and screw holes 37 are provided so as to be spaced apart by 180 ° in the circumferential direction of the drum 29. In FIG. 4, reference numeral 38 denotes a mounting housing for integrally mounting the hydraulic motor 26 to the support frame 11, and 39 denotes an end of the drum 29 from the central flange 32 to the sling wire 20 at the time of winding. This is a guide plate spirally provided on the outer periphery of the drum to guide it toward the unit. In this embodiment, the first wire mounting portion is composed of a first bracket 33 and a bolt 35, and the second wire mounting portion is composed of a second bracket 33 and a bolt 35. . In FIG. 4, reference numeral 38 denotes a mounting housing for integrally mounting the hydraulic motor 26 to the support frame, and 39 denotes a spring wire 20 which moves the spring wire 20 from the center flange 32 to the end of the drum 29 at the time of winding. And a guide plate spirally provided on the outer periphery of the drum to guide the drum. Therefore, as shown in FIG. 2, FIG. 3, or FIG. 4, the mounting portion (eye) 40 at one end of the one sling wire 20 is positioned between the first bracket 33 and the central flange 32. The screw portion of the bolt 35 passing through the hole 36 of the first bracket 33 and the eye 40 of one sling wire 20 is screwed into the screw hole 37 of the central flange 32, and the other end of the other sling wire 20 is screwed. The eye 40 is located between the second bracket 34 and the center flange 32, and the threaded portion of the bolt 35 passing through the hole 36 of the second bracket 34 and the eye 40 of the other sling wire 20 is connected to the center flange 32. The sling wire 20 is screwed into the screw hole 37, and then the respective sling wires 20 are respectively supported on the pulleys 27, 27, and the hydraulic motor 26
Is rotated in the winding direction, the sling wire 20,
The sling wires 20, 20 can be unwound vertically downward by driving the hydraulic motor 26 in the unwinding direction. The reason why the sling wire 20 is attached to the center flange 32 at an interval of 180 ° is as follows.
When lifting the bulldozer 19 by raising the scraping portion 6b, as shown in FIG. 5, the rotation of the drum 29 is allowed until the clockwise couple and the counterclockwise couple balance each other. The reason for using the well-known hydraulic motor 26 as a drive motor is that the weight of the bulldozer 19 is far greater than the torque of the hydraulic motor 26. This is because, even with such use, the structure does not hinder each part. For this reason, it is possible to employ the hydraulic motor 26 which is lightweight, compact and has a small shaft torque, and the drum 29 can be made small and lightweight. When the bottom of the hold 16 is rough,
Conventionally, the attachment and detachment of the sling wire 20 to the scraping portion 6b, the raising and lowering of the scraping portion 6b, and the turning, which have been performed when the bulldozer 19 is raised and lowered, can be eliminated, and the time during this can be reduced. The dispensing capacity of the continuous unloader can be substantially increased. Further, the attachment, detachment and transportation of the sling wire 20 by hand can be eliminated, and safety can be improved. In the above embodiment, since the sling wire 20 is attached to the drum 29,
9, the first bracket 33 and the second bracket 34 are provided on the outer periphery. A shackle (not shown) is attached to the shackle, and the shackle is fitted so as to straddle the center flange 32. Then, a bolt (not shown) is screwed into a screw hole of the shackle, and the sling wire 20 is attached to the center flange 32. May be attached. By doing so, the drum 29 can be configured more simply. In summary, according to the present invention, the following excellent effects can be obtained. (1) It is possible to eliminate the attachment and detachment of the sling wire to and from the scraping section which has been conventionally used for suspending the bulldozer, and to greatly reduce the man-hour for raising and lowering the swiveling section and turning. And the payout capacity of the continuous unloader can be substantially increased. (2) The sling wire is provided so that it can be wound up and out of the scraping portion, eliminating the need to manually attach, remove, and transport the sling wire, greatly improving the safety of unloading bulk items. can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a main part of a continuous unloader according to the present invention. FIG. 2 is a view taken along the line II-II in FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 2; FIG. 4 is a half sectional view for explaining a structure of a drum and a mounting relationship between the drum and a hydraulic motor. FIG. 5 is a schematic diagram for explaining a rotation state of a collar when a bulldozer is suspended. FIG. 6 is a perspective view for explaining the overall configuration of a continuous unloader. FIG. 7 is a schematic diagram for explaining a configuration of a bucket chain conveyor. FIG. 8 is a diagram for explaining a conventional bulldozer suspension method. FIG. 9 is a view for explaining a conventional bulldozer suspension method. [Description of Signs] 6b Scraping section 7 Bucket elevator 9 Sprocket 10 Sprocket 11 Support frame 19 Bulldozer 20 Sling wire 21 Hanging ear (hanging section) 26 Hydraulic motor 28 Drive shaft 29 Drum 32 Flange 33 First bracket (first wire attachment) Part) 34 second bracket (second wire mounting part) 35 bolt (first wire mounting part, second wire mounting part)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-127732 (JP, U) JP-A 60-170327 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 67/60

Claims (1)

(57) [Claims 1] Two sprockets are horizontally spaced from each other to form a lower portion of a bucket elevator as a shoe-like scraping portion, and the sprockets are supported between the sprockets. In a continuous unloader provided with a support frame, a hydraulic motor provided on a support frame with a drive shaft protruding outward from a side surface thereof, a drum integrally provided on the drive shaft, and a bulldozer suspended from the drum A flange integrally provided at the center of the drum for winding two sling wires in parallel, a first wire attaching portion provided to attach one sling wire to one surface of the flange, and a first wire attaching portion provided on the opposite surface of the flange. A second wire attachment portion provided to attach the other sling wire at an interval of 180 ° from the one wire attachment portion; By rolling, two sling wires are wound around the drum, and by reversing the two sling wires, two sling wires are unreeled from the drum, and their leading end mounting portions can be connected to the respective hanging portions of the bulldozer. Continuous unloader.