JPH08192925A - Horizontal main girder type continuous unloader - Google Patents

Abstract

PURPOSE: To provide a horizontal main girder type continuous unloader which is easy of control operation in continuous excavating and unloading work and is excellent in work efficiency. CONSTITUTION: The horizontal main girder 11 of the main body 10 of a traveling type unloader is provided with a traverse truck 15, and a vertical carriage column 16 is provided capably of ascent and descent relative to the traverse truck 15. A vertical carriage conveyor belt 18 elongated on the main girder from the bottom to the land side is provided within the vertical carriage column 16, and the end on land side of the vertical carriage conveyor belt 18 is supported on a conveyor roller 18b at the other end, and it is shifted horizontally, interlocking with the ascent and descent of the vertical carriage column 16. At the bottom of the vertical column 16 is a swing bucket excavation part 20 provided along a dogleg frame. Bulk cargo excavated and held up with the bucket excavation part 20 is supplied to the lower end of the vertical carriage conveyor belt 18, and by the vertical carriage conveyor belt 18, it is carried to an on-machine conveyor 17, a relay conveyor 21, and a ground conveyor 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal main girder type continuous unloader for unloading bulk material used on the quay of a port.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional general continuous unloader for unloading bulk material. The unloader of FIG. 3 is capable of traveling along the quay 1, a traveling type unloader main body 30, a swivel type A frame 31 provided on the main body 30, and a horizontal shaft 32 in the middle stage of the swivel type A frame 31. A swinging boom 34 supported at its intermediate portion by the swing of the cylinder 33, and a link member 35 and L at the tip of the swinging boom 34.
The main part is constituted by a vertical transport column part 37 which is rotatable and has its upper end supported via a frame 36.

In the vertical transfer column section 37, an upper part is a fin conveyer 38 for vertical transfer of bulk items, and a lower half part is an L-shaped bucket excavating part 39 for excavating and supplying bulk items to the lower part of the fin conveyer 38. Constituting on-board conveyor 40,
It relays at 41 and unloads to the above-ground conveyor 42.
In addition, 2 is a ship berthed to the quay 1, and 3 is a bulk cargo in the hold of the ship 2.

[0004]

In the conventional unloader described above, the traveling movement B in the direction perpendicular to the paper surface of the unloader main body 30, the swiveling movement C by the A frame 31, and the cylinder 33.
The position control of the bucket excavation unit 39 is performed by combining the vertical movement arcuate movement D of the vertical transport column unit 37 by the swing boom 34 and the turning movement E of the vertical transport column unit 37 itself.

In the actual unloading work of bulk goods in the hold,
When the vertical transfer column portion 37 is put in and out of the hold through the hold of the ship, the bucket excavating part 39 must be held vertically at the center of the hold so that it does not collide with the edge of the hold. During continuous excavation and unloading of bulk cargo, the vertical transport column section 37 is moved in the rectangular hold mouth in parallel and at right angles to the berth 1 so that it does not contact the rim of the hold mouth, and unloading is performed gradually. I have to go close to the edge.

In the conventional unloader described above, when the vertical transfer column portion 37 is moved vertically, the traveling movement B of the unloader main body 30 and the swiveling movement C of the A frame 31 are performed.
It is indispensable to perform combined control of the operation of the swing boom 34 in the upward and downward arcuate movement D, and when the vertical transport column portion 37 is linearly moved in parallel or at right angles to the quay 1, the unloader main body is used. It is indispensable to perform combined control of the traveling movement B of 30, the turning movement C of the A frame 31, and the turning movement E of the vertical transport column section 37 itself.

It is very difficult for the operator of the crane to perform such a combined control operation while visually observing the relative position between the warehouse mouth and the vertical transfer column portion 37, and the risk of damage due to collision is great, and in general, various types of control operations are performed. Although it is operated with an automatic control system provided, it is difficult to improve the accuracy of the position holding operation of the vertical transport column section 37, especially the bucket excavating section 39 by automatic control, and the equipment cost is increased.

In addition, when the automatic control system is used, the skill level of the manual operation becomes low, and when the automatic control system breaks down during loading or unloading, a manual operation is required. The dangers associated with the increase in cargo are causing an interruption of cargo handling work.

As for the bucket excavation section 39, the L-shaped circulation bucket excavation section 39 has been frequently used in order to easily pick up loose loads on the wall of the hold. Since the L-shaped bucket excavating section 39 generally scrapes loose loads on a flat bulk loading surface, the unloading efficiency is not sufficient, and further remote control of the tip position of the bucket excavating section 39 is automatically controlled. Alternatively, both manual control is difficult.

SUMMARY OF THE INVENTION To solve the above problems, it is an object of the present invention to provide a horizontal main girder unloader which is easy to control for both automatic control and manual control and has a high operating efficiency.

[0011]

In order to achieve this object, an unloader according to the present invention comprises a traveling unloader body having a horizontal main girder; a traverse carriage capable of traversing the horizontal main girder; A vertical transport column that is held so that it can be moved up and down; the inside of this vertical transport column extends upward from the lower end to guide it over the main girder to the land side at the height of the main girder, and circulates it. It is equipped with a vertical conveyor belt provided so that the end conveyor rolls can be moved horizontally on the main girder.

The unloader according to the present invention further supports the upper end portion on the outer wall portion near the lower end of the vertical transfer column portion via the swivel base, and brings the upper end and the lower end closer to each other along the axis of the vertical transfer column portion. The swing bucket excavator is provided so as to supply the bulk cargo excavated by ascending the outer side along the vertical frame to the lower end of the vertical conveyor belt.

In addition to the above-mentioned structure, the unloader according to another aspect of the present invention is configured such that the main girder on the main body of the traveling unloader is an undulating cantilever which holds the tip end horizontally and bends in two steps. The vertical transport column is held in the retracted state at the horizontal part of the tip.

[0014]

In the unloader according to the present invention, the vertical transfer column section is lifted and lowered by simply moving up and down only the vertical transfer column section by the drive mechanism on the traverse carriage on the main girder that has been stopped. Further, the movement of the vertical transfer column section parallel to the quay is performed by running the unloader main body while the traverse carriage is fixed. Further, the vertical transport column section is moved in the direction perpendicular to the quay wall by the horizontal movement of the horizontal carriage with the unloader body stopped.

Further, in the unloader according to the present invention, the swivel bucket excavating section comes into contact with the flat bulk load surface in the inclined bucket patrol section to start excavation, and in the same state, the swivel bucket excavating section descends while swiveling, and from the periphery to the center. Excavate in the direction to scoop up bulk cargo that collapses.

As a result, the control operation necessary for controlling the position of the vertical transfer column section can be performed by a single linear movement operation of either traveling of the unloader, traverse of the traverse carriage, or elevation of the vertical transfer column section. Position control becomes easy. In addition, the swivel bucket excavator can efficiently unload most bulk cargo except the lower corner in the hold with less shifting movement in the hold width direction and the length direction than in the conventional case.

Further, according to another aspect of the present invention, as described above, the main girder on the unloader main body is horizontally held in the structure in which the tip end portion is horizontally held and is made into an undulating cantilever with two-stage bending. The vertical transport column can be stored at the tip of the main girder, and the tip of the main girder can be bent in a compact two-step manner to pull up the vertical transport column, and the unloader can be moved while avoiding interference with the berthing ship. Become.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in FIGS. FIG. 1 is an overall side view of an embodiment of a continuous unloader according to the present invention. In FIG. 1, 1
Reference numeral 0 is a traveling type unloader main body provided so as to be movable along the quay 1, and 11 is a main girder integrally provided on the traveling type unloader main body 10.

The main girder 11 is fixed to the unloader main body 10, a fixed portion 11a, a cantilever portion 11b connected to the tip of the fixed portion 11a so as to be rotatable upward, and a downward rotation to the tip of the cantilever portion 11b. It consists of a tip cantilever part 11c that is operably connected.
b and 11c are connected by a hydraulic cylinder 12 straddling the connecting end portion, and the tip cantilever portion 11c is held horizontally when the cantilever portion 11b is raised and lowered.

The cantilever portion 11b is folded between the cantilever portion 11b and the upper end of the sea-side leg of the unloader body 10 to fold the tension link 1.
3 are connected to each other and supported by a hoisting wire 14a extending from a hoisting drum 14 in a machine room on the rear portion of the main girder 11 so as to be hoisted and driven.

Incidentally, in parallel with the hydraulic cylinder 12, the hydraulic cylinder 1 is also provided between both cantilever portions 11b and 11c.
A folding tension link having the same length as the length of the connecting portion by 2 may be provided.

Reference numeral 15 denotes a traverse carriage provided in a predetermined range on the cantilevers 11c to 11b so as to be traversable by a drive device (not shown), and 16 is a drive device such as a hoisting wire or a chain (not shown) which penetrates the traverse carriage 15 vertically. It is a vertical transfer column section that is vertically movable.

Further, 17 is an on-board conveyor provided on the main girder 11 at a length from the vicinity of the land-side traverse limit position of the traverse carriage 15 to the central position of the unloader body 10, and 18 is the lower end of the vertical conveying column section. To 2 conveyor rolls 18a
And a conveyor roll 18b at a position overlapping the above-mentioned on-board conveyor 17 on the main girder to pass through an opening in the land side wall surface of the vertical transport column section to make an L-shaped and clockwise rotation by a drive device (not shown). It is a conveyor for vertical transportation, which is composed of a finned conveyor and the like.

Further, 19 is a swivel base which is swivel driven by a drive device 19a provided near the lower end of the vertical transport column unit 16, 20 is one end supported by the swivel base 19, and an intermediate part is vertically transported from the swivel base 19. The swivel base 1 is provided so as to be supported by a support frame that extends around the lower end of the column part, and has the upper end and the lower end close to the axis of the vertical transport column part.
9 is a bucket excavating section which is circulated in an upward direction by a driving device (not shown), and 21 is the on-board conveyor 17
It is a relay conveyor provided on the machine so as to convey the bulk load from the land side end of the above to the above-ground conveyor 42. The relay conveyor 21 may be horizontally arranged using a plurality of tiers of chutes.

Next, FIG. 2 shows the details of the vicinity of the vertical transfer column section 16 described above. The vertical conveyer 18 is driven by a guide roll 22 supported by a traversing carriage at the main girder height and extending upward around the two conveyor rolls 18a at the lower end of the vertical conveying column, and the drive conveyor roll 18b on the main girder 11 is guided. It is provided endlessly.

This drive conveyor roll 18b has a main girder 1
A trolley wire 23 driven by a winding drum 23a
The conveyor roll carriage 23 is supported by a conveyor roll carriage 23 traversed by b and is cyclically driven by a drive device on the conveyor roll carriage 23. Is moved to the left and right.

The bulk cargo 3 scooped by the bucket excavator 20 by the bucket is inverted and dropped in the swivel 19, and the chute 25 on the wall of the vertical transport column 16 passes from the chute through the rotary feeder 24. And is loaded in the fin-like pocket of the vertical conveyor 18 and passed to the on-board conveyor 17 at the other end of the vertical conveyor 18 and to the relay conveyor 21 at the other end of the on-board conveyor 17. Landed on the ground conveyor 42.

The cargo handling work by the above-mentioned device is performed in the following order.

(1) With the cantilever portions 11b and 11c pulled up to the storage position indicated by the chain line in FIG. 1, the unloader body 10 travels in the direction B perpendicular to the plane of the drawing, and stops at the lateral position near the end of the opening.

(2) The cantilever portions 11b and 11c are turned downward by the unwinding drive of the hoisting drum 14 and the undulating wire 14a, and set to the horizontal position.

(3) The transverse carriage 15 is adjusted and moved in the length direction (direction of arrow F) of the main girder 11 and stopped at the center position in the width direction of the shed.

(4) The vertical transport column section 16 is lowered along the vertical direction G by the drive of the lifting drive device on the traverse vehicle 15 to bring the lower end of the bucket excavating section 20 into contact with the upper surface of the bulk load 3.

(5) The cyclic excavation drive of the bucket excavator 20 and the swivel direction E drive of the swivel base 19 are started, and the operation of lowering the vertical transport column unit 16 is repeated for each revolution, for example, in units of several cm, to obtain a constant depth. Unloading. At this time, as shown in FIG. 1, the bulk load 3 in the warehouse has the lower end of the bucket excavation unit 20 as the bottom of the recess, and the bulk load 3 naturally collapses into a V shape and is scooped off by the bucket excavation unit 20, and the rotary feeder 24, After passing through the chute 25, it is passed to the vertical conveyor 18 and the main girder 11
It is conveyed upward in an inverted L shape, and is unloaded onto the ground conveyor 42 via the on-machine conveyor 17, the relay conveyor 21.

(6) At the first position, after unloading a certain depth downward for a distance of, for example, about 2 to 3 m, the unloader main body 10
When the unloading operation is continued while moving in the direction B parallel to the quay 1 to the other end of the hold at the slow speed running, the bulk cargo 3 in the hold is unloaded in the V groove shape, and at the other end of the hold, After continuing the unloading operation again for about 2 to 3 m downward, the unloading operation is repeated while moving the unloader main body 10 to the first end position of the kuraguchi at a slow speed in the reverse B direction, and the lower end of the bucket excavating section 20 is held in the hold. Continue unloading until you reach the bottom.

(7) The traverse carriage 15 is moved to the vicinity of the edge of the warehouse to stop the swing of the swivel base 19, and the bucket excavator 20 is moved.
Bucket excavator 2 by the method of contacting a bulk cargo and driving it cyclically
The direction in which the lower end of 0 is in contact with the bottom of the hold and parallel to the quay 1 B
When the width of the V groove is expanded by repeating the reciprocating speed of the unloader main body 10 of No. 3, the height of the mountain near the wall of the bulk cargo 3 is gradually lowered, and the bulk cargo 3 left behind is left only in the lower corner portion around the hold.

The unloading of bulk cargo up to this state is much more difficult than the conventional digging of bucket excavation by the action of the bucket scooping the bulk cargo 3 that naturally collapses from the wall side from the lower side to the upper side. The unloading efficiency is improved.

(8) In this state, the bulk cargo left in the lower corner around the hold holds the bulldozer in the hold, pushes it out to the center of the hold, and unloads it continuously with the unloader.
At the final stage, unloading is completed by loading in containers.

In addition to the above-described method, the unloading operation by this device is carried out by unloading operation downward at the first unloading start position at one end of the hold to the hold floor level, and then moving the vertical transfer column section 16 in the hold length direction. It is possible to change the method as appropriate, such as moving.

That is, according to the above-mentioned apparatus, the vertical transfer column section 16 can be lifted and lowered only by the operation of the drive mechanism on the transverse carriage 15, and the vertical transfer column section 16 can be moved in the direction parallel to the quay 1 by the unloader main body 10. Further, the movement of the vertical transport column section 16 in the direction perpendicular to the quay 1 can be controlled simply by the linear movement of the transverse carriage 15 alone. Therefore, the control method is simplified in both automatic control and manual control, and easy and reliable control operation is possible.

In addition, at the time of unloading, the inward V-shaped bucket excavating section 20 is swung by the swivel base 19 to excavate the unbalanced load 3 around the entire circumference in a frame-like manner, and the bucket is unloaded naturally. Since excavation is carried out in a scooping direction diagonally upward from the lower side along the slide slope, the efficiency of bucket unloading is improved, especially the efficiency of unloading in the center of the hold is increased,
The unloading time can be shortened.

Further, since the leading end side of the main girder is constructed as an undulating cantilever with two-step bending, and the vertical transport column section 16 and the bucket excavating section 20 can be pulled up to the upper position along the quay line, there is no interference with the ship berthed. Instead, the unloader can be run freely.

[0042]

As described above, the unloader according to the present invention has a traveling type unloader main body having a horizontal main girder; a traverse trolley capable of traversing the horizontal main girder; Vertical transport column section; Extend the inside of the vertical transport column section from the lower end upwards, guide the top of the main girder to the land side at the height of the main girder, and circulate it. It is equipped with a vertical conveyor belt which is designed to move horizontally.

The unloader according to the present invention further supports the upper end portion on the outer wall portion near the lower end of the vertical transport column portion via the swivel base, and brings the upper end and the lower end closer to each other along the axis of the vertical transport column portion. The swing bucket excavator is provided so as to supply the bulk cargo excavated by ascending the outer side along the vertical frame to the lower end of the vertical conveyor belt.

The unloader according to the present invention has the above-described structure, and thereby simplifies the lifting and lowering of the vertical transfer column section, the feed movement in the direction parallel to the quay, and the feed movement in the direction perpendicular to the quay, and the control by automatic control and manual control. Easily and reliably, and at the same time, the efficiency of excavation and unloading by the bucket excavator is significantly increased.

In addition to the above-mentioned structure, the main girder tip portion on the unloader body is horizontally held to form an undulating cantilever which bends in two steps, and the vertical girder column horizontal portion is stored and held in the raised main girder tip horizontal portion. With such a configuration, it is possible to avoid the interference with the ship on the shore and to make the unloader freely move and operate.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of a horizontal main girder continuous unloader according to the present invention.

FIG. 2 is an explanatory view showing an enlarged main part in FIG.

FIG. 3 is an overall side view of a conventional continuous unloader.

[Explanation of symbols]

 1 Quay 2 Ship 3 Bulk load 10 Unloader main body 11 Main girder 11a Fixed part 11b Cantilever part 11c Tip cantilever part 12 Hydraulic cylinder 13 Folding tension link 14, 23a Hoisting drum 14a Undulating wire 15 Traverse cart 16 Vertical transport column part 17 Onboard conveyor 18 Vertical Conveyor 18a Conveyor Roll 18b Other End Conveyor Roll 19 Revolving Platform 19a Drive Unit 20 Bucket Excavator 21 Relay Conveyor 22 Guide Roll 23 Conveyor Roll Cart 23b Trolley Wire 24 Rotating Feeder 25 Chute 42 Ground Conveyor B Unloader Running Direction E Excavation section turning direction F Transverse direction G Vertical transport column section up / down direction

Claims (2)

[Claims] 1. A traveling type unloader main body having a horizontal main girder; a traverse carriage capable of traversing the horizontal main girder; a vertical conveying column section held so as to be capable of being vertically moved with respect to the traverse carriage; and a same vertical conveying column. Extend the inside of the part upward from the lower end and guide it over the main girder to the land side at the height of the main girder so that it circulates and moves the other end conveyor roll horizontally on the main girder in conjunction with the elevation of the vertical transfer column part. A vertical conveyor belt provided in the vertical conveyor column; an upper wall is supported by an outer wall portion near the lower end of the vertical conveyor column through a swivel base, and the upper and lower ends are brought closer to each other along the axis of the vertical conveyor column. A horizontal bucket excavator provided so as to supply the lower end portion of the vertical conveyor belt with the bulk cargo excavated by ascending in the upward direction along the circular frame. Digit type continuous loader. 2. The apparatus according to claim 1, wherein the main girder on the main body of the traveling type unloader is configured as an undulating type cantilever that horizontally holds a tip end portion and bends in two steps, and the main girder of the raised main girder is raised. A horizontal main girder-type continuous unloader characterized in that the vertical transfer column section is held in a retracted state at a horizontal end portion.