JP2001048474A - Bulk cargo crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure, to reduce the number of ropes, to facilitate rope hanging, and to smoothly start/stop lateral moving. SOLUTION: This crane comprises a sea side supporting traverse rope R11 wound around a sea side supporting traverse drum 13a at one end, turned up at a boom front end, and led downward from a trolley 6 to be connected to a grab bucket 7; a shore side supporting traverse rope R12 wound around a shore side supporting traverse drum 13b at one end, turned up at a girder back end, and led downward from the trolley 6 to be connected to the grab bucket 7; and an opening/closing rope R2 wound around an opening/closing rope winding drum 14 at one end, extended to the sea side and turned up at the boom front end, led downward from the trolley 6, looped around an opening/closing sheave of the grab bucket 7 and led upward again, extended to the shore side from the trolley 6 to be turned up at the girder back end, and wound around the opening/closing rope winding drum 14 in the opposite direction at the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a crane for handling bulk goods. More specifically, the present invention relates to a bridge-type crane used in a harbor or the like, and relates to a crane for handling bulk goods using a grab bucket as a hanger.

[0002]

2. Description of the Related Art There is a conventional example of a bridge-type crane for loading and unloading loose objects using a grab bucket described in Japanese Utility Model Publication No. 45-27386. In this conventional example, two trolleys, a main trolley and a supplementary trolley, are run on a girder to prevent the grab bucket from moving up and down during traversing, and the trolley uses a dedicated traversing drum and a traversing rope. .

However, the above conventional example has the following problems. (1) Since two trolleys, the main trolley and the auxiliary trolley, are used, the mechanical structure is complicated and the crane becomes large. (2) A traversing rope for traversing the main trolley and auxiliary trolley is required separately from the supporting rope for suspending the bucket and the opening and closing rope for opening and closing the bucket. It is. (3) The above-mentioned traversing rope requires a mechanism such as a tensioning device because the rope is loosened due to the rope hanging structure, and the structure becomes complicated.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bulk cargo handling crane which has a simple structure, has a small number of ropes, can be easily hooked, and can smoothly start and stop a traversing operation. Aim.

[0005]

According to a first aspect of the present invention, there is provided a bulk cargo handling crane according to claim 1, wherein a girder is mounted on a land side of a crane body including a sea leg and a land leg, and a boom is mounted on the sea side. In a bulk cargo handling crane that uses a grab bucket as a lifting device, a trolley traverses above, a sea-side supporting horizontal rope hoisting drum, a land-side supporting horizontal rope hoisting drum, and an opening / closing rope winding installed in a machine room. An upper drum, two guide sheaves attached to the sea end of the boom, two guide sheaves attached to the land side rear end of the girder, and a sea side 2 attached to the trolley.
A row of guide sheaves and two rows of land side guide sheaves, one end of which is wound around the sea side supporting traversing rope hoisting drum, extended to the sea side, folded back by the guide sheave at the end of the boom, and One end is wound around the sea-side supporting traversing rope guided by the side guide sheave and guided downward and connected to the grab bucket, and the land-side supporting traversing rope hoisting drum, and is extended to the land side, after the girder. One end is wound around a land-side supporting traversing rope that is folded back at the end guide sheave and guided downward by the land-side guide sheave on the trolley and connected to the grab bucket, and the opening / closing rope hoisting drum. , The rope is extended to the sea side, folded by the guide sheave at the end of the boom, guided by the sea side guide sheave on the trolley, and guided downward,
It is wrapped around the opening and closing sheave of the grab bucket, guided again upward, guided by the land-side guide sheave on the trolley, extended to the land side, folded back by the guide sheave at the rear end of the girder, and the other end of the rope Comprises an opening and closing rope wound around the opening and closing rope winding drum in the same direction as the one end.

According to a second aspect of the present invention, in the crane for handling bulk goods according to the first aspect, the grab bucket includes an upper sheave box and a lower sheave box. An opening and closing sheave is pivotally supported, and an opening and closing sheave is pivotally supported by the lower sheave box. According to a third aspect of the present invention, there is provided a bulk handling crane according to the first aspect, wherein the trolley guides a traverse operation between the trolley, the girder and the beam, and restrains a tilt and a twist of the trolley. A mechanism is provided.

According to the first aspect of the present invention, the structure is simple because the auxiliary trolley is not used and only one trolley is required, so that the length of the girder is particularly shortened. In addition, since the traversing rope is shared with the supporting rope, the rope hanging structure is greatly simplified. Furthermore, by using the traversing rope in common with the support rope, the tension due to the hanging load always acts on the rope when the traversing is started, so that the starting and stopping can be performed smoothly and the drivability is improved. Then, the number of motors for driving the drum was reduced to three, and the manufacturing cost was reduced. According to the second aspect of the present invention, the support traverse rope can be fixed to the grab bucket and the open / close rope can be wound around the open / close sheave. I can do it. According to the invention of claim 3, all the force applied to the trolley is converted into the lateral action force by the traversing guide mechanism, and the trolley is inclined,
Since it does not twist, the traversing operation can be performed smoothly.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a side view of a crane for handling bulk goods according to an embodiment of the present invention. In FIG.
Denotes a quay, S denotes a ship, CR denotes a crane of the present embodiment, and R denotes a traveling rail of the crane CR.

The bulk crane CR of the present invention has a shape similar to that of a conventional bridge-type crane. That is, it has the crane main body 1 including the land legs 2 and the sea legs 3 and travels on the traveling rail R. The girder 5 is fixed to the sea leg 3 and the land leg 2 and extended to the land side, and a girder 5 is attached to the girder 5. I have. Further, a trolley 6 traverses along the boom 4 and the girder 5. Further, from the trolley 6, a grab bucket 7, which is a hanging tool for loose objects, is suspended.

A machine room 9 is provided on the girder 5,
An up-and-down drum 11 for raising and lowering the boom 4, a trolley 6 is traversed, and two support traversing drums 13a and 13b for raising and lowering the grab bucket 7 and an opening / closing rope winding drum 14 are provided.
Is provided. 16 is a guide sheave rotatably mounted near the upper end of the sea leg 3, 18 is two guide sheaves supported on the sea end of the boom 4, and 19 is two guide sheaves supported on the land side rear end of the girder 5. Guide sheave.

FIG. 1 is an explanatory diagram of a winding route of two supporting traversing ropes R11 and R12, and FIG. 2 is an explanatory diagram of a winding route of an opening / closing rope R3. As shown in FIG. 1, the trolley 6 has two guide sheaves 31 and 32 pivotally supported on the sea side and two guide sheaves 33 and 34 on the land side. Side rollers 61 are attached to the front side and the rear side of the trolley 6. On the other hand, although not shown, the boom 4 and the girder 5 are provided with two guide rails in the longitudinal direction.
1 rolls. This side roller 61
The trolley 6 and the guide rail constitute a traversing guide mechanism described in the claims, and serve to guide the trolley 6 in traverse and to prevent the trolley 6 from being inclined or twisted.

FIG. 2 shows a winding route of the rope in the grab bucket 7. Reference numeral 71 denotes an upper sheave box to which two rope cable end stoppers 52 are attached, and two opening and closing sheaves 73 and 74 are pivotally supported. 7
Reference numeral 5 denotes a lower sheave box, and three open / close sheaves 7
6, 77, 78 are pivotally supported. The upper sheave box 71 supports the entire grab bucket 7. The lower sheave box 75 operates to open the bucket when lowered by its own weight, and to close the bucket when lifted.

FIG. 3 shows a cable end fitting and a connecting fitting of each rope. Reference numeral 10 denotes a cable end stopper for each rope, which is a terminal with a U-shaped ring for passing a shackle or the like through a terminal. Reference numeral 52 denotes a fixed shackle fixed to the upper surface of the grab bucket 7, and the upper end 10 of the rope end of each rope can be freely connected with a pin 55. Note that any metal fitting may be used as the connecting metal as long as the base of the rope can be attached.

Now, a rope winding path for suspending, opening, closing, and traversing the grab bucket 7 will be described with reference to FIGS. FIG. 1 is an explanatory diagram of a winding route of two supporting traversing ropes R11 and R12, and FIG. 2 is an explanatory diagram of a winding route of an opening / closing rope R3. The support traverse drum is composed of two drums, a sea-side support traverse rope hoisting drum 13a (hereinafter, referred to as a sea-side support traverse drum 13a) and a land-side support traverse rope hoist drum 13b (hereinafter, land-side support traverse drum). 13b). The sea-side supporting traversing drum 13a includes:
A sea-side supporting traversing rope R11 is wound, extended to the sea side, folded back by the guide sheave 18 at the end of the boom, guided by the sea-side guide sheave 32 on the trolley 6, and guided downward, and Rope end clamp 5 on the top
2 are connected. A land-side support traverse rope R12 is wound around the land-side support traverse drum 13b, extended to the land side, folded back by the guide sheave 19 at the rear end of the girder, and guided by the land-side guide sheave 33 on the trolley 6. The glove bucket 7 is guided downward, and is connected to a rope cable end stopper 52 on the upper surface of the grab bucket 7.

The open / close rope hoisting drum 14 (hereinafter referred to as open / close drum 14) has one open / close rope R2.
Are wound and fixed in the same direction. One of this one opening and closing rope R2 (sea side rope)
Is wrapped around the guide sheave 18 at the end of the boom via the guide sheave 16 of the sea leg 3 and is folded back.
It is wound around the upper sea-side guide sheave 31, guided downward, and passed through the grab bucket 7. The rope winding path in the grab bucket 7 will be described later, but the rope R2 is guided again upward, is wound around the guide sheave 34 on the inland side of the trolley 6, is guided to the rear end of the girder 5, and Folded at 19, the rope R2
The other (land-side rope) is wound around the opening / closing drum 14.

The rope winding path in the grab bucket 7 will be described with reference to FIG. The opening / closing rope R2 is dropped from the trolley 6, and is sequentially wound around two opening / closing sheaves 73, 74 of the upper sheave box 71 and three opening / closing sheaves 76, 77, 78 of the lower sheave box 75, and is guided upward. , Trolley 6. This sheave 76
The glove bucket 7 is opened / closed by the opening / closing rope R2 wound around .about.78. That is, when the opening and closing rope R2 is extended, the lower sheave block 75 is lowered by its own weight, and the bucket is opened. When the opening / closing rope R2 is wound, the lower sheave block 75 is pulled up and the bucket is closed.

Next, a method of using the crane for handling bulk goods according to the present embodiment will be described. (1) Lifting and lowering of the grab bucket 7 The two supporting traversing drums 13a and 13b and the opening / closing drum 14 are simultaneously driven for lifting or lowering. In this case, the grab bucket 7 is raised by pulling up the support ropes R11, R12, and the grab bucket 7 is lowered by feeding out the support ropes R11, R12. And during this time the opening and closing rope R
If 2 is similarly wound or unwound, the bucket does not open or close because the distance between the upper sheave block 71 and the lower sheave block 75 does not change.

(2) Traversing the Grab Bucket 7 With the open / close drum 14 stopped, the two supporting traversing drums 13a and 13b are driven in opposite directions. In the case of traversing on the sea side, the sea-side supporting traversing drum 13a is taken up and driven, and the land-side supporting traversing drum 13b is driven out. In this case, the sea-side supporting traversing rope R11 is pulled, and the land-side supporting traversing rope R12 is extended, and the trolley 6 is guided by the side rollers 61 by guide rails (not shown) of the girder and the boom. , The trolley 6 moves to the sea side. To traverse on the land side, the land-side support traverse drum 13b is driven to wind up and the sea-side support traverse drum 13a is driven out. In this case, the land side supporting traversing rope R1
2 is pulled, and the sea-side supporting traversing rope R11 is paid out,
Moreover, the trolley 6 is guided by guide rails (not shown) of the girder and the boom, and the trolley 6 does not tilt or twist, so that the trolley 6 moves to the land side. During the above traversing, the opening / closing rope R2 only travels on the path wound around the opening / closing sheaves 73 to 78 in the grab bucket 7, so that the traversing operation is not hindered.

(3) Simultaneous operation of hoisting and lowering and traversing is also two
Of the supporting traverse drums 13a, 13b and the opening / closing drum 14
It is possible in combination. For example, drive as shown in the table below.
You.  Sea side support Land side support Opening / closing drumTraversing drum traversing drum 100 + 50 = 150 -100 + 50 = -50 = 50 Seaside traverse and descent 100-50 = 50 -100-50 = -150 = -50 Landside ramp and climb -100 + 50 = -50 100 + 50 = 150 = 50 Landfall and descent -100-50 = -150 100-50 = 50 = -50  However, the numbers in the table mean the following. Hoisting speed 50m / min +: Winding Unwinding speed 50m / min-: Rewinding Traverse speed 100m / min

(4) Opening and Closing of Grab Bucket The bucket is opened when the opening / closing rope R2 is extended by rotating the opening / closing drum 14 forward and backward, and the bucket is closed when wound up.

According to the above embodiment, the following effects can be obtained. (1) Since only one trolley 6 is used without using a supplementary trolley, the structure is simple. In particular, the length of the girder 5 can be reduced, and the size can be reduced. (2) Since the transverse rope R2 is shared with the support rope R1, the rope hanging structure is very simple. (3) By sharing the traversing rope R2 with the supporting rope R1, the tension due to the hanging load always acts on the rope when the traversing is started, so that the starting and stopping can be performed smoothly and the operability is improved. (4) The number of motors for driving the drum is reduced to three, and the manufacturing cost is reduced.

[0022]

According to the first aspect of the present invention, it is possible to obtain a bulk cargo handling crane which has a simple structure, a simple rope hanging route, a smooth start and stop of traverse, and a low manufacturing cost. According to the second aspect of the present invention, the support traverse rope can be fixed to the grab bucket and the open / close rope can be wound around the open / close sheave. I can do it. According to the third aspect of the present invention, all the force applied to the trolley is converted into the lateral action force by the traversing guide mechanism, and the trolley is not tilted or twisted, so that the traversing operation can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a winding path of two supporting traversing ropes R1 and R2.

FIG. 2 is an explanatory diagram of a winding route of an opening / closing rope R3.

FIG. 3 is an explanatory view of a rope terminal fixing bracket.

FIG. 4 is a side view of a crane for handling bulk goods according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 boom 5 girder 6 trolley 7 grab bucket 13a sea-side supporting traversing drum 13b land-side supporting traversing drum 14 opening / closing drum R2 opening / closing rope R11 sea-side supporting traversing rope R12 land-side supporting traversing rope

Claims (3)

[Claims] A girder is mounted on a land side of a crane body composed of a sea leg and a land leg, a boom is mounted on the sea side, a trolley traverses the girder and the boom, and a grab bucket is used as a hanger. In a bulk cargo handling crane, a sea-side supporting traversing rope hoisting drum, a land-side supporting traversing rope hoisting drum, and an opening / closing rope hoisting drum installed in a machine room, and 2 attached to the sea end of the boom. Guide sheaves, two guide sheaves attached to the land side rear end of the girder, and a sea side 2 attached to the trolley
A row of guide sheaves and two rows of land side guide sheaves, one end of which is wound around the sea side supporting traversing rope hoisting drum, extended to the sea side, folded back by the guide sheave at the end of the boom, and One end is wound around the sea-side supporting traversing rope guided by the side guide sheave and guided downward and connected to the grab bucket, and the land-side supporting traversing rope hoisting drum, and is extended to the land side, after the girder. One end is wound around a land-side supporting traversing rope that is folded back at the end guide sheave and guided downward by the land-side guide sheave on the trolley and connected to the grab bucket, and the opening / closing rope hoisting drum. , The rope is extended to the sea side, folded by the guide sheave at the end of the boom, guided by the sea side guide sheave on the trolley, and guided downward,
It is wrapped around the opening and closing sheave of the grab bucket, guided again upward, guided by the land-side guide sheave on the trolley, extended to the land side, folded back by the guide sheave at the rear end of the girder, and the other end of the rope Comprises an opening / closing rope wound around the opening / closing rope hoisting drum in the same direction as the one end. 2. The grab bucket has an upper sheave box and a lower sheave box. The upper sheave box supports a rope end stopper and an openable sheave, and the lower sheave box has an openable sheave. The crane for handling bulk goods according to claim 1, wherein the crane is supported. 3. A traverse guide mechanism is provided between the trolley, the girder and the beam, for guiding the trolley in a traverse operation and restraining the trolley from tilting or twisting. Bulk handling crane.