JPS63354B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swing-type rope trolley crane for rotating a suspended load using a rope-trolley crane such as a container crane.

When using a container crane, if the ship is not a container-only ship, it may be necessary to rotate the container by 90 degrees to transport it.

By the way, in the recently proposed two-rope trolley type crane, two wire ropes from the hoisting drum A are stretched between the trolley frames B, as shown in FIG. The ropes reciprocate between the trolley frame C, which is rotatably attached to the frame B, and the ends of these ropes are fixed to the running girder of the trolley frame B. As can be seen from this rope hanging method, by adjusting the length of the two wire ropes, the rope sheaves a, b sides or c, d sides of the hanging beam D for supporting the container E can be trimmed up and down. It is only possible. Rope sheaves e, f, g, h on trolley frame B are also attached to rotating frame C.
The upper rope sheaves i, j, k, and m also face only one direction. A method of increasing the number of ropes and sheaves in only one direction is conceivable, but since the sheave interval is limited, it is not possible to reduce the sheave interval between the trolley frame B and the swing frame C.

An object of the present invention is to provide a rope trolley type crane that is capable of swinging a suspended load, trimming of a hanging beam, healing, and fine adjustment of small swings, and that is also lightweight. .

The main points of the present invention are as follows. The rope sheaves of the traversing trolley part and the revolving frame part are arranged concentrically and facing the turning centers of the trolley part and the frame part, so that when the revolving frame part rotates with respect to the traversing trolley part, the traversing trolley Even if the fleet angle between the rope sheave of the section and the rope sheave of the swinging frame section and the wire rope hung on the rope sheave is kept within a certain value, the rope sheave of the traversing trolley section can be The distance between the rope sheaves in the revolving frame can be made closer. Furthermore, by arranging four or more ropes, it is possible to perform fine adjustments to the suspension beam, such as heeling, trimming, and small turns, which are performed with ordinary (non-trolley swing type) rope trolley cranes and container cranes.

Embodiments of the present invention will be described below with reference to the drawings.

2 to 4 show an embodiment of the present invention.

In the figure, 1 is a girder (trolley running girder) of a swinging rope trolley type bridge crane;
is supported by a traversing trolley (trolley frame) 47 that can traverse on the girder 1 via wheels 57, and a revolving frame 5 is supported at the bottom of the trolley 47.
9 is rotatably mounted via a swing bearing 58, and furthermore, a bracket 4 is mounted on the swing frame 59.
A hanging beam (hanging tool) 44 for supporting a container 45 is suspended.

Regarding these drive mechanisms (mainly the second
(see figure), and a hoisting drive device 2 is installed at the rear end of the girder 1.
A hoisting drum 3 driven by a hoisting drum 3 and rope sheaves 4, 5a, 5b, and 6 whose axes are horizontal are attached. Rope sheaves 15, 16, 17, 18, 19, and 20 whose axes are perpendicular are attached to the front end of the girder 1, and the cylinder 55
A trimming frame 56 that is moved in the width direction (perpendicular to the traveling direction of the traversing trolley) is provided, and a lever 5 is mounted on the trimming frame 56 for heeling the hanging beam 44 and making a small turn.
1 and 52 are respectively attached to be swingable around pins, and cylinders 53 and 54 are provided to actuate the levers 51 and 52, respectively.The movement of the trimming frame 56 allows the hanging beam 44 to be trimmed. I'm starting to be able to do it.

Further, on the wheel 57 side of the traveling trolley 47,
Rope sheaves 7, 8, 13, 14 whose axes are vertical are arranged, and rope sheaves 9a, 9b, 10a, 1 whose axes are horizontal are arranged in the center of the traversing trolley 47.
0b, 11a, 11b, 12a, and 12b are arranged so that they each face approximately the rotation center (O) (of the rotation frame) and are located approximately on the circumference of a circle centered on the rotation center (O). It has been done.

Further, in the center of the rotating frame 59, there are rope sheaves 21a, 21b, 22a, whose axes are horizontal.
22b, 23a, 23b, 24a, and 24b are arranged so that they each face approximately the center of rotation (O) and are located approximately on the circumference of a circle centered on the center of rotation (O), and their axes are Vertical rope sheaves 25, 26, 27, 28 are arranged, and furthermore, on both sides of the revolving frame 59 in the longitudinal direction, rope sheaves 29, 30, 31, 32 whose axes are vertical, and rope sheaves 34, 35, whose axes are horizontal. 36, 37,
38a, 38b, 39a, and 39b are provided, respectively. Note that the rope sheaves 21a, 21b, 22
a, 22b, 23a, 23b, 24a, 24b are the rope sheaves 9 of the above-mentioned traversing trolley 47, respectively.
a, 9b, 10a, 10b, 11a, 11b, 1
It is located almost directly below 2a and 12b.

Further, the bracket 44a of the hanging beam 44 has rope sheaves 40, 41, 42, 4 whose axes are horizontal.
3 are each pivoted.

Furthermore, four (or more) wire ropes 48 each having one end fixed to the hoisting drum 3,
49a, 49b, and 50 are connected as follows. The wire rope 48 passes through the rope sheave 4, faces toward the traversing trolley 47, changes direction at right angles to the horizontal direction at the rope sheave 7, and then passes through the rope sheave 10.
a, and hangs on the rope sheave 40 of the hanging beam 44 through the rope sheave 22a and rope sheave 38a of the revolving frame 59, and again the rope sheaves 35, 30, 27, 2 of the revolving frame 59.
Rope sheave 12 of the traversing trolley 47 via 4a
A, the rope end is fixed to the lever 51 on the trimming frame 56 through the rope sheaves 15, 17 on the girder 1 toward the front end of the girder 1.

On the other hand, the wire rope 49a passes through the rope sheave 5a, faces toward the traversing trolley 47, changes direction downward at the rope sheave 9a, and then moves to the rotating frame 59.
Hang it on the rope sheave 21a of the rope sheave 25
The direction of the revolving frame 59 is changed in the longitudinal direction, and the rope is hung on the rope sheave 41 of the hanging beam 44 through the rope sheaves 29 and 34 of the revolving frame 59, and then again passed through the rope sheaves 38b and 22b of the revolving frame 59 and is hung on the rope sheave 10b of the traversing trolley 47. The rope end is fixed to the lever 51 on the trimming frame 56 through the rope sheave 19 on the girder 1, by changing direction in the longitudinal direction of the girder 1 at the rope sheave 13 and facing the front end of the girder 1. Therefore, the wire rope 48 and the wire rope 49a
Each rope end is fixed to both ends of the same lever 51, respectively.

The wire ropes 49b, 50 are wrapped around the wire ropes 49a, 48 so as to be left and right symmetrical with the wire ropes 49b, 48.
are rope sheaves 5b, 9b, 21b, 26, 3
1, 36, 43, 39b, 23b, 11b, 1
4 and 20, and the wire rope 50 is fixed to one end of the lever 52 through rope sheaves 6 and 20.
8, 11a, 23a, 39a, 42, 37, 3
2, 28, 24b, 12b, 16, and 18, and is fixed to the other end of the lever 52.

Although not shown, a drive device consisting of a reducer, a prime mover with a brake, etc. is disposed at the lower part of the traversing trolley 47 to rotate and drive the rotating frame 59, and is fixed to the output shaft of the reducer. The pinion is engaged with an internal gear carved into a rotating ring fixed to the outer periphery of the rotating frame 59, and the rotating frame 59 is rotated by rotating the internal gear via the pinion by the driving of the motor. It is designed to rotate around point O. Further, the traversing trolley 47 is adapted to travel by a normal traveling drive means.

Next, the operation of the crane having the above configuration will be explained.

When the swing frame 59 is turned by the above-mentioned swing drive mechanism (not shown), as an example, the rope sheave 9b of the traversing trolley 47 and the swing frame 5
When the wire rope 49b hung on the rope sheave 21b of the revolving frame 59 is rotated at a rotation angle of 90° clockwise of the revolving frame 59 with respect to the traversing trolley 47, the rope sheave 2 of the revolving frame 59
1b also turns and comes to the position of rope sheave 23b in FIG. At that time, the fleet angle θ is the third
From the figure, becomes. Therefore, the rope sheaves 11a, 11b, 12a, 12b, 9a,
9b, 10a, 10b and the rope sheaves 21a, 21b, 22a, 22b, 23 of the rotating frame 59
The distance between the centers of a, 23b, 24a, and 24b is
By reducing the distance n between wire ropes,
Even when the fleet angle is kept constant, l can be reduced. That is, the overall height of the bridge type crane can be reduced.

Further, by wrapping a wire rope around the hanging beam 44 as in the present invention, fine adjustments such as trimming, heeling, and small turning of the hanging beam 44 can be made. For example, the suspension beam 44 can be trimmed by expanding and contracting the cylinder 55 on the girder 1 to move the trimming frame 56 and raising and lowering, for example, the rope sheaves 42, 43 and 40, 41 of the suspension beam 44. Also, the trimming frame 56
For example, shrink the cylinder 53 above and make the cylinder 54.
When extended, the rope sheave 4 of the hanging beam 44
The 0 and 42 sides go up and the rope sheaves 41 and 43 sides go down, allowing the hanging beam 44 to heel.
Furthermore, by simultaneously contracting and extending both cylinders 53 and 54, the suspension beam 44 can be made to make a small turn.

In addition, although the above-mentioned embodiment is an example in which there are four wire ropes, it is of course possible to perform the same operation even if the number of wire ropes is increased.

Due to the configuration and operation described above, the revolving rope trolley crane of the present invention exhibits the following excellent effects.

(i) When four or more wire ropes are hung around each other, in the present invention, the distance between the rope sheaves between the traversing trolley and the revolving frame can be reduced by arranging the rope sheaves toward the center of rotation and reducing the distance between the wire ropes. , the overall height of the crane can be lowered.

(ii) Since it is composed of a combination of wire rope and rope sheave, it is mechanically simple, lightweight, and easy to maintain.

(iii) Since there are not two wire ropes hanging, fine adjustments (trimming, heeling, small turns) of the hanging beam can be made.

(iv) Since it is suspended by four or more wire ropes, even if one wire rope is cut, the suspended load does not tilt as would be the case with two wire ropes, and the suspended load can be held safely.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of how to hang a rope in a recently proposed crane, Fig. 2 is an explanatory diagram of how to hang a rope in a swivel rope trolley crane of the present invention, and Fig. 3
The figure is a -arrow view in Figure 2, and Figure 4 is a view from the -arrow direction in Figure 2.
It is a - arrow direction view in a figure. 1... Digit, 3... Hoisting drum, 9a, 9b~1
2a, 12b... Rope sheave, 21a, 21b
~24a, 24b...rope sheave, 44...hanging beam, 47...traversing trolley, 56...trimming frame, 59...swivel frame.

Claims (1)

[Claims] 1. In a rope trolley type crane, a swing frame is swingably attached to the lower part of a trolley frame that is movably supported by a trolley running girder, and a hanging device is suspended below the swing frame, and a swing frame is attached to each of the trolley frame and the swing frame. , at least four vertical rope sheaves are disposed correspondingly at at least four equidistant positions substantially on the circumference of a concentric circle centered on the turning center, and one end is fixed to the hoisting device. A swing type characterized in that a length of rope is passed between the corresponding rope sheaves, and the ends of these ropes are fixed to a trimming device provided on the trolley running girder for trimming, healing, and small turns of the hanging equipment. rope trolley crane.