JPH022768B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo handling device that handles cargo using a bucket chain.

Traditionally, regarding the format of continuous unloaders,
Various methods are known, but in particular those aimed at general ocean-going vessels require that the excavated part be inserted through a narrow hatch opening and that the excavated part be bent to the corner inside the hatch. . An example of a known example that satisfies this requirement is shown in FIG. In this example, when collecting loose material, the material is excavated and collected at the lowermost horizontal part of the bucket chain, as shown in FIG. 2a. Now, in Figure 2 a, the cross-sectional area of the hatched part is A (m ² ) (hereinafter referred to as the sampling cross-sectional area), the traverse speed of the bucket is V _T (m/min), and the specific gravity of the material to be handled is ρ.
(t/m ³ ), the collection capacity Q is expressed by the following formula.

Q = 60・A・V _T・ρ(t/h) (1) On the other hand, the amount collected per bucket is V (m ³ ), the mounting pitch of the bucket is P (m), and the speed of the bucket chain is V If _B (m/min), then Q=V・(60V _B )・ρ/P(t/h) (2), and equation (3) is obtained from equations (1) and (2).

V _T /V _B =1/A·(V/P) (3) That is, it can be seen that the ratio of each speed V _T and V _B is inversely proportional to the sampling cross-sectional area A.

Further, this ratio indicates the gradient of the locus of the bucket tip during excavation, and the smaller the gradient, the less resistance during traversing, and the smaller the lateral movement force. On the other hand, as is clear from equation (1), if you want to increase the sampling capacity Q, it is necessary to either increase the sampling cross-sectional area A or increase the traverse speed V _T. It can be said that it is better to make it larger. However, in the case of the conventional type, in order to increase the sampling cross-sectional area, it is necessary to increase the width B of the horizontal portion, which increases the size of the excavated portion. Therefore, for small and medium-sized ships with narrow hatch openings, there are drawbacks such as poor maneuverability and difficulty in handling.

In addition, in the conventional method, when sampling is carried out continuously in a horizontal direction and turned back at the end of the hatch, it is necessary to move the excavation part by a sampling width B as shown in Figure 2a, and during this time sampling is not carried out. Therefore, there is also a drawback that as the sampling width B increases, the cargo handling efficiency decreases accordingly.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a highly efficient continuous unloader that has a small excavation section and can be used even on relatively small ships despite its large capacity.

The main points of the present invention are to reduce the width of the excavation part in order to obtain the same sampling cross-sectional area as the conventional type by inclining the excavation part of the continuous unloader, and to use a telescoping device to collect the sampling part from the corner of the hatch. The structure is such that the excavated portion can be deformed protrudingly without changing the total length of the chain.

An embodiment of the present invention is shown below in Fig. 2b, Fig. 3,
The explanation will be given again with reference to FIGS. 4 and 5.

FIG. 3 shows an overall view of a continuous unloader according to an embodiment of the present invention. Sprockets 2 and 3 are installed at the bottom of frame 1 of the bucket-chain elevator supported from the unloader body.
are arranged above and below so that the bucket chain 4 has an appropriate slope, and both are connected by a continuous rod 5 to maintain a constant straight distance. Sprocket 3
The figure shows a telescopic cylinder 7 that is freely rotatably attached to a part of the frame 1 of a bucket-chain elevator with a pin 6, and a telescopic cylinder 9 that is freely rotatably attached to a pin 8 provided in another frame. 2
Support with a book cylinder. On the other hand, the sprocket 2 is supported by a telescoping cylinder 10 which is rotatably attached via a pin 8. Each of the three telescopic cylinders 7, 9, 10 connects each sprocket 2, 3 and the connecting rod 5.
are supported from frame 1. In order to stabilize the quadrilateral formed by connecting each pin 6, 8 and each sprocket rotating shaft 14, 15 without wobbling, one of the three telescopic cylinders 9 is attached to the diagonal line of the quadrilateral. It is provided with the direction of expansion and contraction facing the direction. For this purpose, one of the three telescopic cylinders 9 is oriented in a different direction of expansion and contraction than the other two telescopic cylinders 7 and 10, thereby stabilizing the holding position of each sprocket 2 and 3. Can be done. Therefore, even if resistance is encountered during excavation work, the work will be stable. As shown in FIG. 3, a sprocket 16 is rotatably attached to the frame 1, and the sprocket 16 is attached at a position that narrows the bucket chain 4 toward the right side in FIG. A part of the bucket chain 4 passes through this sprocket 16. Therefore, even if the horizontal spacing between the sprockets 2 and 3 is wide, the bucket chain 4 is narrowed down by the sprocket 16, so the horizontal spacing of the bucket chain 4 does not become wide in the upper part, and it is difficult to contact the hatch opening. This prevents accidents and the worsening of sprocket 3 leaning toward the inside corner of the boat.

Since this embodiment is configured as described above, if the sampling width B is the same as that of the conventional type, as shown in FIG. 2b,
As is clear from the figure, it is possible to increase the sampling cross section compared to the conventional type, and therefore, as is clear from equation (1), for the same sampling capacity, in the case of this example, the excavation section It is possible to reduce the traversing speed V _T of the traverse, which has the advantage of requiring less power for traversing. In addition, if the same sampling capacity and traversing speed as the conventional type are used, the sampling width B can be made smaller, making the entire excavation part more compact, which has the advantage of being able to handle cargo even for smaller vessels. There is.

The above has described the advantages of having a slope in the excavation section. However, regarding the conditions under which it is possible to collect the hatch corner, which is required as a function of a continuous unloader for general ships, there has been a different method. As shown in Fig. 1, hinge points 12 and 13 are provided so that the lower part of the excavation part becomes a parallelogram, and cylinders 11 provided at diagonal corners of the parallelogram are expanded and contracted. In some cases, the excavated part can be deformed protrudingly without changing the total length of the bucket chain.

In this embodiment, as shown in FIG. 5, the three cylinders 7, 9, and 10 are controlled to expand and contract so that the length L of the bucket chain 4 between the pins 6 and 8 does not change. can be deformed into a protruding shape as shown in FIG. At this time, the distance between the rotation centers 14 and 15 of the sprockets 2 and 3 remains unchanged, so if the cylinder 7 is extended on its extension line, the cylinder 10 can be shortened by that amount on its extension line. Therefore, it is easy to operate.

As described above, according to the present invention, the two sprockets of the excavation section are supported by the telescopic drive device, the excavation section is provided with a slope, and the slope is controlled by the expansion and contraction of the telescoping drive device. It can be changed arbitrarily without changing the total length of the ship, so it can have the same ability as the conventional type without losing its function as a continuous unloader, which allows the excavation part to protrude and collect material up to the hatch corners of the ship. Compared to this, (1) the width of the excavation part can be narrowed;
It becomes possible to unload from a smaller ship, (2) the excavation resistance is reduced and the bucket chain drive device can be made smaller, and (3) the distance traveled at the turning point of excavation is reduced, improving cargo handling efficiency. Effects such as this can be obtained.

[Brief explanation of drawings]

Figure 1 is an overall view of a conventional continuous unloader, Figure 2
Figure a is a perspective view showing a collection shape by the unloader shown in Figure 1, Figure 2b is a perspective view showing a collection shape according to an embodiment of the present invention, and Figure 3 is a perspective view showing a collection shape according to an embodiment of the present invention. FIG. 4 is an enlarged view of the main part of the bucket elevator section shown in FIG. 3, and FIG. 5 is a diagram showing a modification of the bucket elevator section shown in FIG. 4. 1... Frame of bucket and chain type elevator, 2... Sprocket, 3... Sprocket, 4... Chain, 5... Connecting rod, 6... Pin, 7... Cylinder, 8... Pin, 9... Cylinder, 10... Cylinder, 14... Sprocket rotating shaft, 15... Sprocket rotating shaft.

Claims (1)

[Scope of Claims] 1. A chain extending in an endless manner from a chain sprocket at the upper part of the frame, a first chain sprocket at the lower part, and a second chain sprocket to the upper chain sprocket. A bucket elevator modification device comprising a bucket chain and a first and second chain sprocket movable in the radial direction of the chain sprocket, the first chain sprocket and the second chain sprocket A first cylinder is provided between a first point at the bottom of the frame and a first chain sprocket below the first point, and a first cylinder is provided between the first point and a second chain sprocket. a third cylinder is provided between a second point different from the first point and the second chain sprocket, and a third cylinder is provided above the first and second points. A bucket chain for returning from the second chain sprocket to the upper chain sprocket is placed near the bucket chain for going from the upper chain sprocket to the first chain sprocket. A modification device for a bucket elevator, characterized in that it is provided with a third chain sprocket that approaches the bucket chain side.