JP2000159476A - Steady rest device for spreader of container crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of cargo handling by checking runout of spreaders. SOLUTION: The steady rest device for use with a spreader 10 of a container crane 1 for loading or unloading containers 21 into or from containerships comprises a pair of guide rails 16 hung from the middle underside of a crosstie 9a of a trolley 9 so as to hold a sheave block 12 in between, vertical guide rollers 14 mounted on the sheave block 12, and horizontal guide rollers 20 disposed above the sheave block 12. The guide rails 16 splay out and have an inwardly open channel whose width becomes wider as approaching the lower end, so that when the spreader 10 is moved vertically, the vertical guide rollers 14 roll on the groove bottoms of the guide rails 16 while the horizontal guide rollers 20 roll on the groove sides of the guide rails 16 to guide the sheave block 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steadying device for a spreader for a container crane, and more particularly to a spreader for a container crane which is installed on a quay such as a container wharf and loads or unloads containers from a container ship. The present invention relates to a steady rest device.

[0002]

2. Description of the Related Art Conventionally, a container crane has been used as a cargo handling device installed on a quay such as a container wharf and loading or unloading containers with a berthing container ship.

FIG. 4 is a front view of a container crane.
In the figure, reference numeral 1 denotes a container crane which travels on a traveling rail 3 laid along a quay 2. 4 is a rear leg of the container crane, and 5 is a front leg. 6 is this rear leg 4
And a main girder provided horizontally above the front leg 5 so as to be orthogonal to the traveling rail 3. Reference numeral 7 denotes a boom provided on the main girder 6 so as to project toward the sea, and is connected to be rotatable in the vertical direction. Primary girder 6 and boom 7
And constitute the crane girder 8. When the container ship 22 berths, the boom 7 stands upright so as not to obstruct the berth, and is held horizontally so as to protrude above the container ship 22 when cargo handling work is performed. 9
Is a trolley provided movably via wheels arranged on the upper end on a rail laid on the boom 7. Reference numeral 10 denotes a spreader, which is a suspending tool for the container 21, and is provided so as to be movable up and down by a hoisting device (not shown) via a sheave block 12 suspended by a rope 11 on a trolley 9. 29 is a container guide provided on the rear leg 4,
Unmanned trolley 3 movably mounted on elevated rail 31
The container 21 is guided to the top of the container 0.

[0004]

However, in the conventional container crane described above, when the container is gripped and the trolley is moved laterally, the spreader swings and the trolley starts suddenly.
There is a problem that it is not possible to stop suddenly, the trolley takes a long time to move laterally, and the cargo handling efficiency is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and prevents the spreader from swinging.
It is an object of the present invention to provide a spreader steadying device for a container crane for enabling the trolley to start and stop suddenly and to improve the efficiency of container handling.

[0006]

According to the present invention, there is provided a container ship having a trolley that moves on a crane girder, and the container is lifted and lowered by a spreader suspended from the trolley via a sheave block. A spreader for a container crane for loading or unloading to or from a container crane, wherein the spreader is hung on a lower surface of the trolley in the middle of the horizontal connecting member so as to hang a sheave block therebetween. It has a pair of guide rails, a vertical guide roller provided on the sheave block, and a horizontal guide roller provided above the sheave block, wherein the guide rail has a groove shape opened inward, and The width of the groove and the distance between the guide rails are increased toward The bottom surface of the groove of Lumpur, horizontal guide roller steady rest of the spreader of a container crane so as to guide the sheaves block while rotating in contact with the side face of the groove of the guide rail is provided.

Next, the operation of the present invention will be described. When the trolley moves sideways along the crane girder, the spreader steady rest device of the container crane is a pair of guides that are arranged by winding up a sheave block with the spreader connected to the lower surface with a rope and hanging down from the lower surface of the trolley. Move inside the rail. When lifting a container from a container ship, the container is stopped above the container ship, the sheave block stored in the guide rail is hung down by a rope, and the spreader is lowered onto the container, and is provided at the four corners on the lower surface of the spreader. The container is gripped and lifted by the container tightening device. When the sheave block is raised, the horizontal roller above the sheave block enters the groove of the guide rail, and when further raised, the horizontal roller contacts the side surface of the guide rail groove and rotates. When the sheave block is further raised, the vertical roller on the sheave block contacts the bottom surface of the guide rail groove and rotates. A pair of guide rails
Since the groove width and the interval are widened downward, even if the spreader slightly shakes below, these rollers enter the guide rails, and the run-out is regulated as the roller rises.

When the trolley is moved laterally, the horizontal roller and the vertical roller of the sheave block are brought into contact with a groove-shaped guide rail provided on the lower surface of the trolley to restrict the movement of the sheave block. And the trolley can be suddenly started and stopped, and therefore, the efficiency of the cargo handling work of the container can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a spreader steady rest device for a container crane according to the present invention. FIG. 2 is a front view of the spreader steady rest device. FIG. 3 is a sectional view of the guide rail, and FIG.
Arrow view, (B) is view from arrow B, (C) is view from arrow C, (D)
FIG. In these figures, parts common to those described in FIGS. 4 and 5 will be described using the same reference numerals, and redundant description will be omitted.

In FIGS. 1 to 3, reference numeral 7 denotes a boom of the container crane 1, and reference numeral 8 denotes a crane girder.
Reference numeral 9 denotes a trolley provided movably via a wheel 9b disposed on an upper end on a rail 7a laid inside the boom 7. 9a is a horizontal connecting member of the trolley 9 (FIG. 2). 10
Is a spreader for gripping the container 21. A container guide 15 having a flipper 15b at the lower end for guiding the container 21 at the four corners is pin 15 when gripping the container 21.
It is pivoted by a. 10a are tightening corner fittings provided at the four corners of the upper surface of the spreader 10 and connected to the sheave block 12. At four corners on the lower surface of the spreader 10, twist-lock type container tightening devices (not shown) for gripping the container 21 are provided.

The sheave block 12 is suspended by a rope 11 wound around a sheave 17 provided on the upper surface and a sheave 18 provided on the trolley 9, and is moved up and down by a lifting device (not shown). Reference numeral 12a denotes a twist lock type tightening corner fitting provided at four corners on the lower surface of the sheave block 12, and is connected to the tightening device 10a of the spreader 10.
13 is a sheave block 12 in the middle of the sheave block 12.
The arm is provided so as to be orthogonal to and protrudes outward. A vertical roller 14 that rotates in the vertical direction in contact with the groove bottoms of the pair of guide rails 16 is provided at the tip of the arm. Reference numeral 27 denotes a power supply cable basket provided in the middle of the upper surface of the sheave block 12 for storing a power supply cable (not shown).

The pair of guide rails 16 are provided so as to hang down in the middle of the lower surface of the lateral connecting member 9a of the trolley 9. Each guide rail 16 has a disk-shaped substrate 24 at the upper end, and has a groove shape that opens inward, and is formed so that the groove width and the distance between the guide rail 16 increase downward. (FIGS. 1 and 3). Each guide rail 16 is fixed to the lower surface of the horizontal connecting member 9a of the trolley 9 via a board 24 by bolts 25 and nuts 25a. In addition, 26
Is a spring externally fitted to the bolt 25.

Reference numeral 19 denotes a connecting member fixed to a projection 28 (FIG. 3B) provided on the outside of the power supply cable basket 27. At both ends, a horizontal roller 20 which rotates in contact with the side surface of the groove of the guide rail 16 is provided. Is provided.

Reference numeral 23 denotes a connecting member extending between the guide rails 16, and reference numeral 23a denotes a connecting pin.

Next, the operation of the present embodiment will be described. The steady rest device of the spreader 10 of the container crane 1
When the trolley 9 moves laterally along the crane girder 8, the sheave block 1 with the spreader 10 connected to the lower surface
2 is wound up by the rope 11 and is accommodated and moved in a pair of guide rails 16 arranged to be suspended from the lower surface of the trolley 9. When hoisting the container 21 from the container ship 22, the container 21 is stopped above the container ship 22, and the sheave block 12 stored in the
1. Spreader 10 is suspended by
The container 21 is lowered, and the container 21 is gripped and lifted by container tightening devices provided at four corners on the lower surface of the spreader 10. When the sheave block 12 rises, the horizontal roller 20 above the sheave block 12 enters the groove of the guide rail 16, and when further raised, the horizontal roller 20 comes into contact with the side surface of the groove of the guide rail 16 and rotates. When the sheave block 12 is further raised, the vertical rollers 14 on the sheave block 12 rotate while contacting the bottom surface of the guide rail 16 groove. Since the pair of guide rails 16 has a groove width and an interval that are widened downward, even if the spreader 10 slightly shakes downward, the rollers 14 and 20 enter the guide rails 16 and run out as the ascent increases. Be regulated.

When the trolley 9 is moved laterally, the horizontal roller 20 and the vertical roller 14 of the sheave block 12 are brought into contact with a groove-shaped guide rail 16 provided on the lower surface of the trolley 9, thereby restricting the movement of the sheave block 12. So, spreader 1
0 can be prevented, and the trolley 9 can be started and stopped suddenly, so that the efficiency of the cargo handling work of the container 21 can be improved.

The present invention is not limited to the above-described embodiment, but may be variously modified without departing from the gist of the present invention.

[0018]

As described above, according to the present invention,
When the trolley is moved laterally, the horizontal roller and the vertical roller of the sheave block are brought into contact with the groove-shaped guide rails provided on the lower surface of the trolley to regulate the movement of the sheave block. Thus, the trolley can be started and stopped suddenly, and therefore, it is possible to obtain an excellent effect that the efficiency of the container handling operation can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a steady rest device for a spreader of a container crane according to the present invention.

FIG. 2 is a side view of a spreader steady rest device.

3A and 3B are cross-sectional views of a guide rail, wherein FIG. 3A is a view from an arrow A in FIG. 1, FIG. 3B is a view from an arrow B, FIG. 3C is a view from an arrow C, and FIG. is there.

FIG. 4 is a front view of the container crane.

[Explanation of symbols]

 Reference Signs List 1 container crane 6 main girder 7 boom 8 crane girder 9 trolley 10 spreader 11 rope 12 sheave block 13 arm 14 vertical roller 15 container guide 16 guide rail 17 sheave 19 connecting member 20 horizontal roller 23 connecting member 24 substrate 25 bolt 26 spring 27 power supply Cable basket 29 Container guide 30 Unmanned trolley 31 Elevated rail

Claims (1)

[Claims] 1. A container crane having a trolley that moves on a crane girder, and lifting or lowering a container by a spreader suspended from the trolley via a sheave block to load or unload a container ship. A spreader steady rest device, wherein the spreader steady rest device is provided on a lower surface of the trolley in the middle of the horizontal connecting member, and a pair of guide rails disposed so as to sandwich a sheave block, and the sheave block. A vertical guide roller provided, and a horizontal guide roller provided above the sheave block, wherein the guide rail has a groove shape that opens inward, and a gap between the groove width and the guide rail faces downward. The vertical guide roller is located on the bottom of the guide rail groove when the spreader moves up and down. The spreader for a container crane, wherein the roller guides the sheave block while rotating in contact with the side surface of the groove of the guide rail.