JPH048111Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an unloader equipped with a double belt conveyor.

[Prior art and its problems] As is well known, a typical example of a continuous unloader for unloading bulk materials from a ship's hold is a system in which the base end of a boom is pivoted to a revolving frame on a traveling trolley so that it can be raised and raised freely.
A bucket elevator (or vertical screw conveyor) is connected and supported at the tip of the boom, a bucket foil is attached to the bottom of the bucket elevator, and a scraping conveyor is connected to the shaft of the bucket foil via an arm to scrape the scraper. The structure is such that the loose materials collected on the conveyor are scooped up with a bucket foil and transported upwards with a bucket elevator for unloading.

However, in such a continuous unloader, since loose materials are collected by a scraping conveyor, a gap is created between the scraping conveyor and the bottom of the ship, making it impossible to completely scrape the bottom.

For this reason, for example, by using the shafts of the bucket foil on both sides of the bucket foil, the base end of a scraping board that is vertically erected and has a substantially triangular shape when viewed from the side is pivoted, and the scraping conveyor is attached to the tip of the scraping board. An articulated unloader has been proposed in which the unloader is attached so that it can be raised and lowered (Utility Model Publication No. 55-24031).

However, even with such a proposal, it is not possible to completely eliminate loose materials (see No. 26, Column 4 of the same bulletin).
(~line 27), and assuming that the bucket elevator is always installed vertically, this scraping board is formed into a triangular shape, so the bucket elevator swings around the tip of the boom. This creates a gap between the bottom of the scraping board and the bottom of the ship, making it difficult to adjust this gap.

On the other hand, a ship unloader equipped with a double belt conveyor is known as a vertical conveyance means for a device for unloading bulk goods from a ship's hold. That is, Japanese Patent Application Publication No. 1973
According to Publication No. 25078, since the area of the opening on the deck is small compared to the size of the hold, the vertical frame supporting the double belt conveyor is divided into a part of the lower frame and an upper frame. The frame is divided into parts, and these frames are swingably connected by a connecting shaft, so that the entire vertical frame can be bent, and the double belt conveyor can be bent within a maximum of 30 degrees. As a result, the bucket foil attached to the lower end of the conveyor is said to be able to reach the inner surface of the circumferential wall of the hold due to the bending of the vertical frame.

However, in a continuous unloader equipped with such a double belt conveyor, even if the lower frame of the vertical frame is bent within 30 degrees to perform scooping work, the bottom of the bulk material cannot be completely scraped using only the bucket foil. I can't.

Therefore, a lot of unloading time is required.

[Means for solving the problems] Therefore, the present invention was devised in an attempt to solve these problems of the conventional technology all at once. A double belt conveyor for vertical conveyance connected and supported at the tip, a frame that supports the double belt conveyor inside, a swing cylinder whose one end is connected to the frame and the other end to the boom, and the lower end of the frame. In the unloader for unloading bulk materials, the frame is composed of an upper frame and a lower frame, the lower frame and the upper frame are pivotally connected to each other via pins, and one end is attached to the upper frame. is provided with a center-folding cylinder whose other end is connected to the lower frame,
The paddle side of a scraping conveyor with a large number of protruding blades is provided on the lower frame via an arm so that it can be raised and lowered freely, and one end of the scraping conveyor's raising and lowering device is connected to the lower frame, and the other end is connected to the scraping conveyor. The unloader is equipped with a double belt conveyor.

[Example] The structure of the present invention will be explained in detail with reference to an example shown in the accompanying drawings together with its operation. 1 is a schematic overall side sectional view of an embodiment of the present invention, FIG. 2 is a view of the main part of FIG. 1, and FIG. 3 is a plan view of the main part of FIG. 1.

This embodiment is applied to a ship unloader, and the unloading capacity of the ship unloader is 700 to 1000 t/h.
A bulldozer is a large one that can be used to carry out raking work by putting a bulldozer inside the ship's hold (conventionally, actual bottom raking work relies on this type of equipment). It is.

In Fig. 1, 1 is a ship unloader, 2 is a ship's hull, and 3 is a dry powder or granular material (grain, fertilizer, powder, etc., and these are referred to as bulk materials). Then, the cargo is unloaded from the ship's hold onto the ground via the ship unloader 1.

The ship unloader 1 has a base end 6a of a boom 6 pivotably supported on a revolving frame 5 on a traveling carriage 4 so as to be able to move up and down freely, and a double belt conveyor 7 connected and supported to a distal end 6b of the boom 6. A pair of paddles 8, 8 are attached to the lower part of the double belt conveyor 7, and the scraping conveyor 11 is attached to the frame 9, which supports the double belt conveyor 7 inside, via an arm 27 (see FIG. 2). The loose materials 3 are connected and collected by a raking conveyor 11, scooped up by paddles 8, and transported upward by a double belt conveyor 7 for unloading work. The swing cylinder 10 has one end connected to the side surface of the frame 9 and the other end connected to the bottom surface of the boom 6. Then, the boom 6 performs a lifting motion in the direction of the arrow a in FIG. 1 by means of the cylinder 12 for raising and lowering, and the frame 9 performs a swing motion in the direction of the arrow b in FIG. 1 by the cylinder for swinging 10.

Here, the double belt conveyor 7 is constructed by combining two belt conveyors 7a and 7b.
This conveying device vertically conveys bulk materials 3 between heavy belts, and has the advantage that it does not take up much space when viewed from above and can carry out continuous conveyance with high efficiency.

That is, the double belt conveyor 7 of this embodiment
As shown in FIG. 2, the frame 9 is supported within a frame 9, which is comprised of an upper frame 13 that can swing and a lower frame 14 that is normally vertically oriented. The upper frame 13 and the lower frame 14 are pivotally connected to each other via pins 15, and the upper frame 13
A center-folding cylinder 16 is provided between the upper frame 13 and the lower frame 14, with one end attached to the upper frame 13 and the other end attached to the lower frame 14.

The frame 14 is bent in the direction of arrow c in FIGS. 1 and 2 by expanding and contracting the center-folding cylinder 16.

The lower end of the double belt conveyor 7 is wound around a tail pulley 17 attached to the lower part of the lower frame 14. The belt edge is pressed by a pair of edge pressing rollers 18, 18 from the non-conveying surface of the belt, and
An inflatable part is formed in the middle of the heavy belt in the width direction, and the bulk material 3 can be sandwiched and conveyed by this inflated part. A pair of drum-shaped belly press rollers 19, 19 are disposed on the non-conveying surface side of the belt directly above the tail pulley 17.
9 regulates the amount of bulk material 3 to be conveyed.

At the center of the bend between the upper frame 13 and the lower frame 14 due to the pin 15, a pair of bending pulleys 20 are provided with the center point of bending as a contact point. Like the belly pressing roller 19, the bending pulley 20 is shaped like a drum and has a large diameter at the belt edge and a small diameter at the middle part in the width direction of the belt.

On the outer periphery of the lower frame 14, the lower frame 1
A scraper rotating barrel 21 is attached which rotates around 4 in the direction of the third arrow d, and the scraper rotating barrel 21
A pair of arms 27 that can be raised and lowered are pivotally attached to the holder, and the paddle 8 side of the scraping conveyor 11 is connected to the tip of each arm 27, respectively. Arm 27
A stopper 22 is attached to the inside of the base of the scraper to prevent the arm 27 from coming into contact with the scraper rotating body 21.

The scraper rotating barrel 21 is configured to be rotated in the direction of arrow d in FIG. 3 by a scraper drive device 23 provided on the outer periphery of the lower frame 14. One end of a levying device 24 for raising and lowering the raking conveyor is connected to a longitudinally intermediate portion of the raking conveyor 11, and the other end of the levying device 24 is connected to the lower frame 14.

In this embodiment, the hoisting device 24 is constituted by a hoisting device consisting of a wire and a winch.
By driving the hoisting device, the scraping conveyor 11 is lifted from the position shown by the solid line in FIG. 2 to the position shown by the chain line.

The scraping conveyor 11 is provided with a chain 25 whose lower side is in a slack state, and a drive device 26a for driving this is attached (only one scraping conveyor 11 is shown). A scraper blade 26 is provided protrudingly.

Since this embodiment is configured as described above,
Perform the following actions.

In the case of normal unloading work, the scraping conveyor 11 is raised and stored in the position shown by the chain line in FIG. . Therefore, the double belt conveyor 7 and paddles 8 are driven to move the boom 6 to the undulating cylinder 12.
As a result, the frame 9 is raised and raised in the direction of the arrow a in FIG. 1, and the frame 9 is swung in the direction of the arrow b in FIG. 1 by the swing cylinder 10.

Then, the traveling cart 4 is moved, the bulk goods 3 are scooped up by the paddles 8, and conveyed upward by the double belt conveyor 7, thereby performing a so-called unloading operation.

Next, if such normal unloading work is not possible, that is, if bottom raking work is to be performed, lower the scraping conveyor 11 to the position shown by the solid line in Figure 2,
Moreover, the amount of expansion and contraction of the swing cylinder 10 and the folding cylinder 9 is adjusted to keep the lower frame 14 substantially vertical at all times.

Therefore, the double belt conveyor 7 and the paddles 8 are driven, and the boom 6 is moved to the luffing cylinder 1.
2 in the direction of arrow a, and then lower the upper frame 1.
3 in the direction of the arrow b by the swing cylinder 10, and swinging the lower frame 14 in the direction of the arrow c by the folding cylinder 16, the scraping conveyor 11 scrapes up the loose items 3, and the paddles 8 scoop them up. , the double belt conveyor 7, which travels while bending at the bending pulley 20, conveys it upward and performs the bottom scraping work.

Here, on the inner surface 2a of the circumferential wall of the hold, as shown in FIG.
is positioned perpendicularly to the inner surface of the peripheral wall 2a and fixed without turning, and is moved horizontally along the inner surface of the peripheral wall 2a in the direction of arrow e in FIG. 3. Next, when the ship reaches the middle of the hold, the scraping conveyor 11 is moved horizontally while rotating in the direction of arrow d, and the bottom scraping operation is performed.

[Effects of the invention] Since the present invention is a double belt conveyor, even if the frame is composed of an upper frame and a lower frame and can be bent to each other, bulk items can be conveyed vertically. Moreover, if the scraping conveyor is attached to the lower frame and the upper and lower frames are swung to keep the lower frame in a nearly vertical position during bottom raking work, the scraping conveyor will always be in even contact with the bottom of the ship. can, and in turn,
Able to complete bottom-level work.

Furthermore, if the scraping conveyor is raised, the scraping conveyor will not interfere with normal cargo handling operations, allowing efficient cargo handling operations.

[Brief explanation of the drawing]

1 is a schematic overall side sectional view of this embodiment, FIG. 2 is a view of the main part of FIG. 1, and FIG. 3 is a plan view of the main part of FIG. 1. 6...Boom, 7...Double belt conveyor, 8
... Paddle, 9 ... Frame, 10 ... Swing cylinder, 11 ... Scraping conveyor, 13
... Upper frame, 14 ... Lower frame, 26
……blade.

Claims (1)

[Claim for Utility Model Registration] A boom that can be raised and raised freely, a double belt conveyor for vertical conveyance that is connected and supported at the tip of the boom, a frame that supports the double belt conveyor inside the belt, and one end of which is connected to the frame, An unloader for unloading bulk materials consisting of a swing cylinder whose other end is connected to a boom, and a paddle provided at the lower end of the frame, wherein the frame is composed of an upper frame and a lower frame, the lower frame and the upper frame. A center-folding cylinder is provided, which is pivotally connected to each other via a pin, and one end is connected to the upper frame and the other end is connected to the lower frame, and the paddle side of the scraping conveyor with many protruding blades is connected via the arm. What is claimed is: 1. An unloader equipped with a double belt conveyor, characterized in that it is provided on a lower frame so that it can be raised and lowered freely, and that one end of a lifting device of the scraping conveyor is connected to the lower frame and the other end is connected to the scraping conveyor.