JPH0547183Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention is a rope receiving device for a folding type bridge crane, more specifically, a rope receiving device for a bridge crane used for port cargo handling, etc., to prevent the hoisting rope from becoming entangled. The present invention relates to a rope receiving device for a center-folding type bridge crane.

[Prior Art] A bridge crane is one of the cranes used for port cargo handling. This bridge-shaped crane is placed so that it can run along the quay, and its structure has a boom and girder placed horizontally on the main body, and the tip of the boom extends to the sea, and a lifting device is attached above the boom and girder. The trolley with which it is attached runs and handles cargo.

By the way, in this bridge type crane, the hoisting wire attached to the tip of the boom is wound around the hoisting drum via a trolley and a sheave installed at the rear end of the girder. If this is not working, a deflection due to its own weight will occur between the end of the boom and girder and the trolley. When a load is applied to the hoisting load under such conditions, the hoisting rope vibrates violently up and down, causing it to come into contact with the boom or other members, or come off the sheave of the trolley.

For this reason, a rope receiver is provided between the trolley and the end of the boom and girder, and the hoisting wire is received by the rope receiver to prevent the wire from being bent.

However, there are problems when this rope receiver is used in a folding type bridge crane. That is, the fourth
When the bridge crane is placed on the quay 1 as shown in the figure, the tip of the boom 6 needs to be extended to the sea, which will cause an obstruction when the ship 3 enters and leaves the port.
This is hoisted up, but in order to prevent it from becoming a hindrance to the aircraft, the tip of the rope is sometimes bent approximately horizontally as shown by the solid line, so to speak, but in this case, the rope receiver 4 is attached to the slanted part of the boom. It must be fixed and special fixing devices must be provided for this purpose. In addition, at this time, the hoisting rope hangs down significantly between the sheave at the tip of the boom and the rope receiver, as shown in 38, and becomes an obstacle when the ship enters the port.
Since it is necessary to provide another rope receiver 37 at the bent portion of the rope and the rope 21, there is a problem that the structure becomes complicated. In addition, 5 is a trolley.

[Purpose of invention]

The present invention was made to solve the problems of the conventional methods as described above, and its purpose is to fix the rope receiver by moving the rope receiver to an arbitrary position using simple means. The purpose of the present invention is to eliminate the need for a special device for lifting the boom, and also to use it as a rope receiver when hoisting the boom, thereby simplifying the structure and preventing an increase in construction costs.

[Summary of the idea]

In order to achieve the above-mentioned object, the present invention provides a center-folding bridge type crane having a rope receiver, in which the other end of the first wire fixed to the front of the trolley is connected to the drive device through the sheave of the first rope receiver. After winding the wire around the drum, the trolley is attached to the rear of the trolley via a sheave provided on the second rope receiver, and the other end of the second wire fixed to the front of the first rope receiver is connected to the tip of the boom and The rope receiver is attached to the rear end of the second rope receiver via a sheave attached to the rear end of the girder, and the rope receiver can be made independently by fixing the trolley and rotating a drum connected to a drive device. It is designed so that it can be moved to any desired position.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rope receiving device for a folding type bridge crane according to the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a schematic side view of a center-folding type bridge crane 10, which is arranged so as to be able to run on a quay 11 along a rail 12. This bridge crane 10 has a horizontal girder 14 and a boom 3 on an upright main body 13.
A trolley 17 having a sheave 15 and suspending a hanging device 16 is disposed on the girder 14 and the boom 36 so as to be able to run, and the trolley 17 and the boom 3
A first rope receiver 18 is disposed between the tip end 35a of the girder 14, and a second rope receiver 19 is disposed between the trolley 17 and the rear end 14b of the girder 14. The boom 36 has a first bent portion 20 at its tip that is bent upward as shown by the dotted line.
and a substantially horizontal second bent part 21 provided at the tip of the first bent part 20.

Then, the trolley 17 and each rope receiver 18,1
9 etc., there is a hoisting wire 22 and a first wire 2.
3. The second wire 24 is placed.

Specifically, as shown in FIG.
One end is fixed to the tip 36a of the boom, and the other end is connected to the first rope receiver 18, the sheave 15 of the trolley 17, the hanging device 16, and the second rope receiver 19.
Sheave 2 provided at the rear end 14b of the girder 14
5 and then wound onto a winding drum 26.

One end of the first wire 23 is attached to the tip of the trolley 17 with a turnbuckle 27 or the like.
After passing through the sheave 28 of the second rope receiver 18 and being wound around a drum 30 connected to a drive device 29 such as a motor, the rope is passed through the sheave 31 of the second rope receiver 19 and attached to the rear of the trolley 17 by a turnbuckle 32 or the like. ing.

Furthermore, the second wire 24 has one end attached to the front of the first rope receiver 18 and is connected to the tip 36a of the boom 36.
The cable is stretched through a sheave 33 attached to the girder 14 to a tensioning device 34, and then via a sheave 35 attached to the rear end 14b of the girder 14 so as to be attached to the rear of the second rope receiver 19.

In this configuration, during normal cargo handling, the drive device 29 is braked to stop the rotation of the drum 30. Then, the first rope receiver 18 and the second rope receiver 19 move at 1/2 the speed of the trolley 17 in the running direction of the trolley 17 during cargo handling, and support the hoisting wire 22 at approximately the middle part thereof, thereby bending the hoisting wire 22. can be prevented.

Note that the trolley is run by a known method, such as by driving a separately provided wire rope (not shown) through a drum, or by providing a drive device on the trolley to rotate the wheels.

Now, as shown in FIG.
is located on the first bending portion 20 of the boom 36, and when bending it upward, first stop the trolley 17, then rotate the drum 30 by the drive device 29, and the first The rope receiver 18 and the second rope receiver 19 run toward the tip side of the boom 36. Then, when the first rope receiver 18 reaches above the second bending part 21, the boom 20 is hoisted up. A wire rope (not shown) is stretched between the booms 20 and 21 by a known method, and when the boom 20 is hoisted up, the wire rope 21 gradually bends, and when it is hoisted up the most, it is approximately horizontal. It is configured to be.

Of course, when the trolley 17 is located on the boom 36, it is moved backward onto the girder 14 and then the first bent portion is bent upward by the method described above.

At this time, the second rope receiver also moves the same distance to the boom 36 side, and the trolley 17 and the girder rear end 1
Although it deviates from the intermediate position with 4b, it does not cause any inconvenience because cargo handling is not in progress.

[Effect of idea]

As is clear from the above explanation, according to the rope receiving device of the center-folding type bridge crane according to the present invention, during cargo handling work, the rope receiving device is positioned approximately midway between the trolley, the tip of the boom, and the rear end of the girder. In addition to preventing excessive bending of the rope,
The rope receiver 18 can be moved to any position by operating the drive device 29.

Therefore, when the boom 36 is to be depressed, it can be quickly and easily moved to the second bending portion 20 provided at the tip thereof, and as a result, the first rope receiver 18 can be wound when the boom is depressed. Since it can be placed at the optimal position to receive the upper rope, there is no need to provide a separate rope receiving device, which has the effect of preventing complication of the structure and increase in construction cost.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the rope receiving device for a center-folding bridge type crane according to the present invention, in which Figure 1 is a schematic side view, Figure 2 is an explanatory diagram of wire tensioning, FIG. 3 is an explanatory diagram of the operation, and FIG. 4 is a schematic side view of a conventional center-folding type bridge crane. 1, 11... quay, 2, 14... girder, 3
... Ship, 4 ... Rope receiver, 5, 17 ... Trolley, 10 ... Bridge crane, 12 ... Rail,
13...Main body, 15, 25, 28, 30, 31,
33, 35...Sheave, 16...Hanging tool, 18...
First rope receiver, 19...Second rope receiver,
20...first bending part, 21...second bending part,
22... Hoisting wire, 23... First wire, 2
4... Second wire, 26... Winding drum, 2
7... Turnbuckle, 29, 32... Drive device, 34... Tension device, 36... Boom.

Claims (1)

[Claims for Utility Model Registration] Consists of a trolley on a horizontally arranged boom and girder, and a first rope receiver and a second rope receiver arranged before and after the trolley, and is attached to the tip of the boom. The other end of the hoisting wire is wound around the hoisting drum via the first rope receiver, the trolley, the second rope receiver, and a sheave provided at the rear end of the boom, and the tip of the boom is wound around the hoisting drum. In a center-folding bridge type crane that is bent upward, a first wire fixed to the front of the trolley is connected to a drum having a sheave and a drive device provided in the first rope receiver, and a second rope. The second rope is fixed to the rear of the trolley via a sheave provided on the receiver, and the other end of the second rope fixed to the front of the first rope receiver is attached to the sheave attached to the tip of the boom and the rear end of the girder. 1. A rope receiving device for a center-folding type bridge crane, characterized in that the rope receiving device is fixed to the rear of a second rope receiving device through the cable.