JPH0344976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bucket elevator type continuous unloader, and more particularly to a continuous unloader equipped with a collision damping device against the bottom of a ship and a bottom roughening mechanism.

When using a conventional bucket elevator type continuous unloader to unload cargo from a ship's hold, the bucket may come into contact with the bottom of the ship due to the vertical movement of the ship, causing an accident. In order to avoid this, it is known that a load cell, limit switch, etc. is built into the bucket support column so that the bucket elevator can escape in response to changes in load. This was the cause of the accident.

The present invention was proposed to address these conventional problems, and the gist of the invention is to provide a bottom collision buffer with a bottom roughening function in a bucket elevator type continuous unloader having two swing points. It is characterized by:

The embodiments shown in the drawings will be explained below.
In FIGS. 1 and 2, A is a first swing mechanism, which is composed of a first-stage swing hydraulic cylinder 1 and a swing arm 2a. The first-stage swing hydraulic cylinder 1 is attached to an elevator post 7 that is always perpendicular to the tip of the boom and is rotatably supported. Then, by the operation of the hydraulic cylinder 1, the first stage swing frame 2 swings forward (bucket rising side) via the swing arm 2a. Its swing angle is about 60° to the bucket's rising side (left side in Figure 1).

Reference numeral B denotes a second swing mechanism, which is composed of a second-stage swing hydraulic cylinder 4 and a swing link 5. The first stage swing frame 2 has a first swing frame 2 whose upper part is pivotally connected to the lower end of the elevator post 7.
It is composed of a frame 2', and a second frame 2'' whose upper part is slidably connected to the first frame 2' and whose lower end has the upper end of the second stage swing frame 6 pivotally connected to the first frame 2'. A telescopic cylinder 8 for raising and lowering the second frame 2'' is provided between the second frame 2'' and the second frame 2''.

Further, a second swing mechanism is provided between the second frame 2'' and the second swing frame 6, and the second swing frame 6 is connected to the longitudinal axis _c1 of the first swing frame 2 and the elevator chain 10. The sprocket S can be swung to the rear side in the direction of rotation of the sprocket S being wound thereon.

Due to the operation of the hydraulic cylinder 4, the second-stage swing frame 6 swings rearward by about 90 degrees with respect to the longitudinal axis _c2 of the first-stage swing frame 2 via the swing link 5.

The telescopic cylinder 8 has a stroke that includes the difference in length of the chain that occurs geometrically due to the extension and swing motion of the chain, and the necessary amount to create a catenary state, and performs a contraction operation at the same time as detecting an abnormal load.

9 is bucket and 10 is chain. Chain 1
0 is guide sprocket 11 or chain guide 1
2, the same swinging motion as the swing frames 2 and 6 is always performed.

The present invention has the above configuration, and its operation will be explained next.

If you are working with the second-stage swing hydraulic cylinder 4 not operating, that is, with the lower side of the first-stage swing point straight, and you receive an impact from the bottom of the ship due to the vertical movement of the ship, At the same time that the telescopic cylinder 8 detects the abnormal load, the hydraulic cylinder 8 causes a contraction operation and retreats.

The same applies when the first-stage swinging hydraulic cylinder 1 is operated and an impact is received from the bottom of the ship while swinging forward. It also collided with the ship's belly and hatch, etc.
When an abnormal load is received from the directions a to f shown in FIG. 3, the first-stage swing hydraulic cylinder 1 detects the abnormal load and at the same time, the hydraulic cylinder 1 or 8 is operated and evacuated.

When discharging the bottom of the ship where there is a risk that the bucket elevator may come into contact with the ship's bottom 13, in other words, when discharging the bottom, leave the first stage swinging, retract the telescopic cylinder 8, and tighten the lower sprocket. By raising the bucket elevator and carrying out bulk cargo handling work with the bucket elevator in a catenary state, that is, with the chain of the bucket elevator hanging from the rear side in the direction of rotation of the lower sprocket (downward side of the bucket chain), The bottom load can be efficiently discharged without being affected by the impact caused by the vertical movement of the bottom load (see Fig. 4).

Next, when working with the second stage swing 4 activated and swung approximately 90 degrees to the rear (downward side of the bucket chain), the telescopic cylinder 8 detects an abnormal load as described above. and evacuate.

In addition, in such a state, if you want to carry out a payout such as dredging the bottom, retract the telescopic cylinder 8 to create a catenary state in the bucket chain below the second stage swing frame 6 parallel to the bottom of the ship, as shown in Fig. 5. This allows efficient cargo handling.

The present invention is applied to a continuous unloader in which a bucket elevator is rotatably suspended from an L-shaped frame movably connected to the tip of a boom, and is rotatable by a rotation mechanism.

As explained above, the present invention provides a bucket elevator type continuous unloader that enables long and short swings in two stages, and by providing a bottom collision buffer with a bottom dredging function, it is possible to achieve agile and efficient cargo handling operations. This will surely solve the conventional problems,
This type of continuous unloader has extremely excellent advantages.

[Brief explanation of drawings]

FIG. 1 shows the swing mechanism of the bucket elevator of the present invention, FIG. 2 is a side view of FIG. 1, and FIGS. 3 to 5 are explanatory views of the operation. In the diagram; A...first swing mechanism, B...
Second swing mechanism, 1... Hydraulic cylinder for first stage swing, 2... First stage swing frame, 2a
...Swing arm, 2'...First frame,
2″...Second frame, 4...Hydraulic cylinder, 5
... Swing link, 6 ... Second stage swing frame, 7 ... Elevator post, 8 ... Telescopic cylinder, 9 ... Bucket, 10 ... Chain, 11
...Guide sprocket, 12...Chain guide, 13...Bottom.

Claims (1)

[Claims] 1. The first stage swing frame 2 is pivotally connected to the lower end of the elevator post 7 which is always vertical and is supported in a rotatable manner, and the second stage swing frame 6 is pivotally connected to the lower end of this first stage swing frame 2. death,
A sprocket S is rotatably held at the lower end of the second stage swing frame 6, and an elevator chain 10 to which bucket belts 9 are attached at predetermined pitch intervals is wound around the sprocket S, and the elevator post 7 and the first stage A first stage swing frame 2 is provided between the swing frame 2 and the first stage swing frame 2 so as to be able to swing across the longitudinal axis _c1 of the elevator post 7 and the front side in the rotational direction of the sprocket S around which the elevator chain 10 is wound. The first swing frame 2 is connected to a first frame 2' whose upper part is pivotally connected to the lower end of the elevator post 7, and whose upper part is slidably connected to the first frame 2'. and a second frame 2'' to which the upper end of the second-stage swing frame 6 is pivotally attached to the lower end, and an extendable mechanism for raising and lowering the second frame 2'' between the first and second frames 2' and 2''. The second swing frame 6 is provided with a cylinder 8, and between the second frame 2'' and the second swing frame 6, the second swing frame 6 and the longitudinal axis _c1 of the first swing frame 2 and the elevator chain 10 are wound. A bucket elevator type continuous unloader comprising a second swing mechanism B that is capable of swinging across the rear side in the rotational direction of the sprocket S.