JPS59128135A - Method of continuous unshipping - Google Patents

Abstract

PURPOSE:To improve the limitation of the body of an unshipping equipment in the stoppage of the body on the working limits, by driving the body of the unshipping equipment at a continuous reduced speed to always turn an ascending unshipping portion at a large radius. CONSTITUTION:A truck 3 is very slowly moved by one or a combination of the movement of the body of an unshipping equipment, which comprises the truck, a turning bed 7, a boom 8, etc., and the horizontal movement of the turning arm 2 of the boom 8. The turning motion of an ascending unshipping portion 16 provided at the tip of the boom 8 is added to the movement of the truck 3 as the radius of turning of the ascending unshipping portion is altered, so that a scoop- in unit 20 is driven in at nearly regular intervals. As a result, a large fixed amount can be unshipped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous unloading method that enables large-capacity, quantitative unloading from a ship or the like.

As lifting devices for vertically unloading equipment, there are two types: one that scoops the cargo onto a rotating packet foil, and the other that scoops the cargo directly with a packet elevator for ascending cargo.

In addition, the holding method during upward lifting is the front excavation method in which the iJ9 holding part is pushed in the direction of excavation progress, and the other is the front excavation method in which a certain cut is given to the holding part and it is moved in a direction perpendicular to the direction of excavation progress. There is a side drilling method.

In the case of the frontal excavation method, the side surface of the excavation is vertical, which causes the load to collapse, making it impossible to increase the depth of cut, and since it is unidirectional excavation, it has the disadvantage of intermittent excavation. On the other hand, in the case of the side excavation method, the cutting depth can be increased and excavation can be performed in both directions, so continuous excavation is possible.

Therefore, the side excavation method is suitable for continuous unloading.

Conventionally, the side excavation methods used for continuous unloading from a ship include a traveling method as shown in Fig. 1, a traversing method as shown in Fig. 2, and a lateral method as shown in Fig. 2.
As shown in the figure, there is mainly a method of turning, but in either method, the main body of the lifting device must be moved at a fairly high speed and reversed within the limits of the working range.

In addition, in the case of use on the ground or in a clave, the working range is wide, so there is no problem mainly with the turning method, but in the case of unloading from a ship, the working range is limited to the narrow hatch opening 1, so the turning method is not a problem. This occurs very frequently, and furthermore, the high-speed movement of the lifting device body poses a great risk of collision with the hatch opening 1.

The object of the present invention is to provide a continuous unloading method that advantageously solves the above-mentioned problems.

Next, the present invention will be explained in detail using illustrated examples.

FIGS. 4 to 8 show an example of a continuous unloading device having a packet foil type holding device used when carrying out the present invention. is placed on a rail 5 laid so as to extend in the longitudinal direction of the quay wall 4, and a swivel platform 7 is attached to the upper part of the bogie B, which is rotated by a swing drive device B.
Moreover, on the upper part of the swivel base 7, a pool 8 extending in the lateral direction perpendicular to the traveling direction of the trolley B is attached so as to be able to be raised and lowered by a horizontal shaft 9, and furthermore, the pool 8 and the swivel base 7 are connected to each other for raising and lowering. They are connected via a hydraulic cylinder 10.

A horizontal annular support 11 is attached to the tip of the boom 8 along the horizontal axis 1.
2, and the swivel base 7 and the annular support base 1
1 is connected to the annular support base 11 via a horizontal holding mechanism 16 that always holds the annular support stand 11 in a horizontal state.

An annular turning member 15 is attached to the upper part of the annular support base 11, which is turned by a turning drive device 14 via a driving vehicle and a large-diameter annular driven gear, and an ascending lifting section 16 consisting of a bendable packet elevator. consists of a vertical upper ascending conveyance section 17, a lower ascending conveyance section 18 bendably connected to the lower end thereof, and a bending/extending section connected to the annular turning member 15 and a bracket on the side of the lower ascending conveyance section 18. and a hydraulic cylinder 19, and the lifting section 16
A holding part 20 made of a packet foil rotated by a drive device is provided at the lower end of the holding part 20, and the upper ascending conveyance part 17 is inserted through and fixed to the annular turning member 15.

A rotating body 21 consisting of an annular bottom plate and an inner annular side plate rising from the inner peripheral edge thereof is disposed so as to surround the annular rotating member 15, and a large number of wheels 22 fixed to the lower part of the rotating body 21 serve as an annular support base. The rotating body 21 is placed on an annular rail 23 fixed to the upper part of the rotating body 11, and is moved in the direction of the arrow ( (b) direction.

An outer annular side plate 25 is disposed on the upper part of the outer circumferential side of the annular bottom plate, and an opening is provided in the portion of the outer annular side plate 25 on the pool 8 side, and a chute 26 is connected to the opening. A scraping plate 27 inclined with respect to the rotating direction of the rotating body is fixed to the front edge of the rotary body in the rotating direction, and the rotating body 21, the outer annular side plate 25, the unit 26, the scraping plate 27, and the rotary feeder are connected to each other. The outer annular side plate 25 is fixed to the annular support 11 via a connecting member 28.

The chute 29 at the upper end of the lifting section 16 is connected to the rotating body 21.
The chute 26 of the rotary feeder is arranged in the upper part of the groove formed by the outer annular side plate 25 and the groove 9, and the chute 26 of the rotary feeder is arranged at the upper part of one end of the conveyor 60 extending along the boom 8, and the other part of the conveyor 30 The end is the discharge chute 3
1, and its discharge chute 61 is fixed to the rotating base 7, and furthermore, the lower end of the discharge chute 61 opens to the upper part of the relay conveyor 62 attached to the trolley 6,
Further, the discharge end of the relay conveyor 62 is arranged above the ground belt conveyor 66.

FIG. 9 shows a continuous unloading device of the packet elevator direct enclosing type used for notification of implementation of this invention,
Although the holding portion made of the packet foil is omitted, the other configurations are the same as those in FIGS. 4 and 8.

Each of the continuous unloading devices includes a truck 6. Swivel base7. Boom 8.
It has the functions of running the main body of the lifting device consisting of the annular support 11 and the like, turning and raising and lowering the boom 8, and turning and swinging (bending) the lifting section 16. Then, while the lifting device main body is continuously moved at a very slow speed by the movement of the lifting device main body and the turning of the boom 8 (the large radius turning of the rising lifting portion 16), either alone or in combination, the lifting device main body is moved at a very slow speed. It unloads cargo by rotating and swinging.

Alternatively, the boom may be attached to the truck so that it can move laterally in a direction perpendicular to the direction of travel of the truck, and the boom may be moved laterally, or traversed, in a direction perpendicular to the direction of travel of the truck instead of rotating.

FIG. 10 shows the locus of the holding part during unloading work, where 0 is the center of rotation of the lifting part and W is the working range.

FIG. 10 shows the case where the lifting operation is carried out without performing the oscillating motion of the lifting lifting section 16, and in the direction A, the lifting lifting section is It shows the direction in which the turning center O of No. 16 moves. In addition, in FIG. 10, A', B, B', C, etc. indicate the locus of the holding part at the lower end of the rising lifting part 16, and A'
→B, the lifting device main body moves at a constant speed while the ascending lifting section 16 performs a turning movement. Further, the distance t between B and B' indicates the distance that the main body has moved within the time required for the lifting section to turn and reverse, and the same movement is repeated thereafter.

In this case, the load cutting depth 9 changes between t and t2, so if the turning speed of the lifting lifting section is constant, the lifting capacity also changes in accordance with the cutting depth. In order to counteract this change, in addition to the swing motion of the ascending cargo section, the turning radius of the ascending cargo section may be changed, or the turning radius of the ascending cargo section may be kept constant and the turning speed of the ascending cargo section may be changed. By changing the amount, it is possible to perform fixed-quantity unloading work.

Figure 11 shows the case where unloading work is carried out by adding the swinging motion of the ascending unloading section, and the symbols in the diagram indicate the first
As in the case of Figure 0, the locus of the holding part is shown. 11th
In the figure, between A and B, the turning radius of the rising lifting section is gradually reduced by the swinging motion in response to the change in cutting depth caused by the slow movement of the lifting device main body. Also B-+B'
In between, the turning radius of the lifting lift section is increased around the 90 point by a rapid swinging motion up to the set turning radius.

By making the depth of cut t substantially constant through a combination of these movements, it is possible to perform a quantitative unloading operation.

FIG. 12 shows a case in which the unloading operation is performed while the turning radius of the ascending unloading section is kept constant and the turning speed is varied.

In this case, since it takes time to reverse the rotation at the limit of the rotation range, the unloading device main body advances over t times during that time. Therefore, the depth of cut changes between t-t and t2, and by changing the turning speed in accordance with the change, it is possible to perform fixed-quantity unloading work.

In addition, FIG. 16 shows the turning speed of the lifting section at each position.

Next, the unloading operation is carried out by adding 9 swing motions to the ascending unloading section, and the unloading operation is carried out while the turning radius of the ascending unloading section is kept constant and the turning speed of the ascending unloading section is varied. The effects of unloading operations will be compared.

In the former case, the performance of the packet foil can be fully utilized at all times, so ideal cargo unloading work can be performed. Furthermore, in the latter case, when the depth of cut is smaller than the function of the packet foil, it is possible to turn at a higher speed, so by utilizing this, it is possible to approach an ideal unloading operation.

In addition, the turning radius of the rising lifting section is changed by swinging motion so that the depth of cut is approximately constant, while the lifting lifting section is constantly using a large radius turning and the lifting device main body is continuously running at a slow speed. By this, or by keeping the turning radius of the rising lifting section constant and changing the turning radius of the rising lifting section in response to changes in the depth of cut, it is possible to carry out large-capacity, quantitative unloading work.

Since the continuous unloading method of the present invention is configured as described above, the following effects can be obtained.

(1) Since the lifting device main body is continuously moved at a slow speed and the rising lifting section is constantly turned in a large radius, controllability is good when stopping the lifting device main body at the working limit.

(2) Since the frequency of starting and stopping of the main body of the lifting device, which has a large mass, is greatly reduced, the life of the machine is extended, the operation of the machine is simplified, and energy consumption is reduced.

(3) If something with a large amount of momentum, such as the traveling or turning of the lifting device itself, comes into contact with the ship's hatch, the ship or machinery will be seriously damaged; however, in the case of this invention, There is no possibility of contact due to movement, and since the momentum of the lifting section is small, contact with the ship's hatch will not cause significant damage to the ship or machinery.

Furthermore, if the drive mechanism of the lifting part is equipped with a damping function such as hydraulic pressure, the maximum collision force can be regulated.

[Brief explanation of drawings]

1 to 6 are schematic plan views for explaining the conventional side excavation method. 4 to 8 show an example of a continuous lifting device used when carrying out the present invention, FIG. 4 is a side view showing the whole, and FIG. 5 is a rising lifting part support structure and A partially longitudinal side view showing the vicinity of the rotary feeder, Fig. 6 is a plan view thereof, Fig. 7 is an enlarged longitudinal side view showing a part of Fig. 5, and Fig. 8 is a plan view showing a part of the rotary feeder. It is a diagram. FIG. 9 is a side view showing another example of a continuous unloading device used in carrying out the present invention. 10 to 12 are plan views for explaining the continuous unloading method of the present invention,
FIG. 13 is a diagram showing the turning speed at each position of the notch. In the figure, 6 is a truck, 7 is a swivel base, 8 is a boom, and 10
11 is an annular support base, 15 is an annular rotating member, 16 is an ascending lifting section, 17 is an upper ascending conveyance section,
18 is a lower ascending conveyance section, 19 is a hydraulic cylinder for bending and stretching,
20 is a holding part, 21 is a rotating body, 25 is an outer annular side plate, 2
6 is a chute, 27 is a scraping board, 29 is a chute,
30 is a transport conveyor, 61 is a discharge unit, 62 is a relay conveyor, and 33 is a ground belt conveyor.

Claims (2)

[Claims] (1) While the movement of the lifting equipment main body is performed continuously at a very slow speed by the movement of the lifting equipment main body and the turning or traversing of the boom in the lifting equipment main body, either alone or in combination, the lift provided on the tip side of the boom By adding the turning motion of the lifting section to the movement of the lifting device main body while changing the turning radius of the rising lifting section so that a substantially constant cutting depth is given to the lifting device as a result, A continuous unloading method characterized by unloading a fixed amount of capacity. (2) While the movement of the lifting equipment main body is performed continuously at a very slow speed by the movement of the lifting equipment main body and the turning or traversing of the boom in the lifting equipment main body, either alone or in combination, the lift provided on the tip side of the boom The turning movement of the lifting part is made such that the turning radius of the lifting part is kept constant, and the lifting part turns in response to changes in cutting depth so that the holding capacity is approximately constant as a result. A continuous unloading method characterized by performing large-capacity quantitative determination and unloading by adding speed to the movement of the unloading device main body while changing the speed.