WO2008059809A1

WO2008059809A1 - Bridge crane

Info

Publication number: WO2008059809A1
Application number: PCT/JP2007/071952
Authority: WO
Inventors: Osamu Sasaki
Original assignee: Sumitomo Heavy Industries Engineering & Services Co., Ltd.
Priority date: 2006-11-14
Filing date: 2007-11-13
Publication date: 2008-05-22
Also published as: JP4777863B2; JP2008120538A; KR20090082391A; CN101535167A

Abstract

Provided is a bridge crane capable of easily performing slight movement of a lifted load forward and backward. In the bridge crane, a main trolley (10) traverses over girders (1). Hoisting devices (14F, 14R) and guide sheave moving mechanisms (20F, 20R) are installed on the trolley truck (11) of the main trolley (10). Each of the hoisting devices (14F, 14R) comprises a winch (15), a rope (R) unwound from and wound on the winch (15), and hooks (60) onto which the rope (R) is hooked. Each of the guide sheave moving mechanisms (20F, 20R) comprises an extension stand (21) for moving a sheave truck (30) equipped with guide sheaves (41 to 44, 51 to 54), around which the intermediate part of the rope (R) is wound, forward and backward of the girders (1), and a forward/backward moving means (35) for the extension stand.

Description

Specification

Bridge crane

Technical field

[0001] The present invention relates to a bridge crane. More specifically, the present invention relates to a bridge type crane that supports both ends of a girder with rigid legs and swing legs, a trolley traverses on the girder, and lifts a load with a hook suspended from the trolley.

Background art

[0002] As shown in Non-Patent Document 1, bridge-type cranes are used for quay handling and shipbuilding, as well as for general cargo handling. There are two main trolleys and auxiliary trolleys that traverse the girder. There are some that use.

The two trolleys can be moved independently or at the same time. For large luggage and hull blocks, hang them together with two hooks, and wind up and down one to open # 1.

The auxiliary trolley hangs one hook from the center of the girder, and the main trolley hangs two hooks from the front and rear sides of the upper surface of the girder. It is fixedly arranged.

An example of the conventional example as described above will be described with reference to FIGS.

The bridge crane C shown in Fig. 12 is composed of a girder 1, a rigid leg 2 fixed to one end thereof, and a swing leg 3 attached to the other end with a pin. The main trolley 100 and the supplementary trolley 5 traverse on the rails provided on the girder 1.

As shown in FIG. 11, a supplementary trolley 5 runs through the central part of the girder 1, and a hook 6 is suspended through a rope in the central space.

The main trolley 100 runs on the rails on both sides of the girder 1, and two winches 102 are mounted on the trolley cart 101. In addition, guide sheaves 103 and 104 are attached to both ends of the trolley carriage 101 in the front-rear direction (direction orthogonal to the girder 1), and the hook 105 is suspended through a rope fed from each winch 102. Since the mounting positions of the guide sheaves 103 and 104 corresponding to the front and rear winches 102 are fixed, the two hooks The distance d in the front-rear direction of the hook 105 is unchanged.

[0004] Because of the structure described above, for example, when building a hull with a block construction method at a shipyard, a large block co-suspended with two hooks 105 is moved slightly. Even when coupled to the hull under construction, the bridge-type crane C had to be powered, and it was difficult to move slightly.

[0005] Non-Patent Document 1: New edition Mechanical Engineering Handbook C3—Transport Machine 19 pages

Disclosure of the invention

Problems to be solved by the invention

[0006] In view of the above circumstances, an object of the present invention is to provide a bridge crane that can easily perform a slight back-and-forth movement and small turning movement of a suspended load.

Means for solving the problem

[0007] The bridge crane of the first invention is a bridge crane in which a main trolley traverses on a girder, wherein a hoisting device and a guide sheave moving mechanism are provided on the trolley carriage of the main trolley, The hoisting device includes a winch, a rope that is unwound from the winch, and a hook around which the rope is wound, and the guide sheave moving mechanism includes a guide sheave around which the rope is wound. And a moving mechanism for advancing and retreating the guide sheave in a direction perpendicular to the longitudinal direction of the girder. A bridge crane according to a second aspect of the present invention is the bridge-type crane according to the first aspect, wherein the moving mechanism includes an overhanging base fixed to the trolley bogie, a sheave bogie traveling on the upper surface of the overhanging bogie, and a forward / backward moving means for the sheave bogie. The base of the overhang base is fixed to the trolley cart, and the tip projects in a direction perpendicular to the longitudinal direction of the girder. The guide sheave is attached to the sheave cart. /!

A bridge crane according to a third aspect of the present invention is the bridge-type crane according to the second aspect, wherein the traveling path of the sheave carriage in the overhanging base is inclined downward from the proximal end toward the distal end, and the horizontal length of the traveling path is The height ratio is equal to the ratio of the number of ropes between the guide sheave and the hook and the number of ropes between the guide sheave and the winch.

A bridge crane according to a fourth aspect of the present invention is the first aspect of the invention, wherein the hoisting device and the guide sheave movement mechanism are provided for the front and the rear, respectively, The frame is installed on the front side of the girder, and the rear guide sheave mechanism is installed on the rear side of the girder.

The invention's effect

[0008] According to the first invention, when the guide sheave of the guide sheave moving mechanism is moved forward and backward by the moving mechanism, the guide sheave moves away from or approaches the girder. Therefore, the guide sheave is suspended from the rope wrapped around the guide sheave. Hooks that are still away from or approach the girder. Therefore, only the hook can be moved back and forth without moving the bridge crane itself, so that the suspended load can be moved slightly, thereby improving the efficiency of the cargo handling work. When the main trolley and auxiliary trolley are suspended, the main shelves guide sheaves can be moved back and forth slightly, so that the suspended load can be swiveled, so that heavy objects can be assembled efficiently. According to the second invention, when the sheave cart travels on the upper surface of the overhanging platform, the guide sheave attached to the sheave cart also moves S, and the direction of movement is perpendicular to the longitudinal direction of the girder as with the overhanging platform. The guide sheave moves away from or approaches the girder because of the orientation. For this reason, since the hook is also separated or approached from the girder, the suspended load can be moved slightly.

According to the third aspect of the invention, since the travel path of the overhanging table is inclined downward, the rope length force S between the guide sheave and the hook, which is shortened by advancing the guide sheave, the height of the guide sheave on the overhanging table is high. This is compensated by the lower position. Therefore, even if the sheave cart is moved forward and backward, the hook height does not fluctuate, so cargo handling work can be performed easily. If the balance between the rope tension between the guide sheave and the winch and the rope tension between the guide sheave and the hook is matched with the inclination ratio of the overhanging stand, the combined force of the rope tension is perpendicular to the travel path of the overhanging stand. Therefore, it is not necessary to increase the forward / backward drive force of the sheave cart.

According to the fourth invention, since the hoisting device and the guide sheave moving mechanism are provided with a pair for the front and the rear, it is possible to hang a large luggage with two hooks, and the front and rear By moving the guide sheave in the same direction, even a large suspended load can be moved and rotated slightly, so that the cargo handling work can be performed efficiently.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described with reference to the drawings. In the bridge crane of the present invention, the crane itself composed of a girder, a rigid leg, and a swinging leg, and the auxiliary trolley are not particularly different from the conventional example shown in FIG. 12, so only the main trolley will be described below.

FIG. 1 is a side view of a main trolley according to an embodiment of the present invention.

In Fig. 1, 1 is a girder, which consists of two left and right girders, and the center is a space. In the center of the girder 1, the supplementary trolley 5 runs in the direction perpendicular to the paper surface as in the conventional example, and the hook 6 is suspended through the rope in the space in the center.

Yes

The main trolley 10 which is characteristic to the present invention is configured as follows! The trolley cart 11 has wheels 12 and runs on a rail 13 (see FIG. 2) installed on the girder 1 in a direction perpendicular to the paper surface.

[0011] On the trolley carriage 11, two hoisting devices 14F and 14R and two guide sheave moving mechanisms 20F and 20R are installed. The right side in the figure is for the front, and the hook 60 is suspended at a position protruding forward from the front of the girder 1. The left side in the figure is for the rear, and the hook 60 is suspended at a position protruding rearward from the rear surface of the girder 1.

Each hoisting device includes a winch 15, a rope R, and a hook 60. These structures are the same as the conventional example. The guide sheave moving mechanism 20F, 20R has a moving mechanism for moving the guide sheave around the rope R forward or backward in a direction (forward or backward) perpendicular to the longitudinal direction of the girder 1. .

[0012] The guide sheave moving mechanisms 20F and 20R include a guide sheave for guiding the rope R fed from the winch 15 and a moving mechanism force for moving the guide sheave forward and backward with respect to the girder 1. This moving mechanism includes an overhang base 21, a sheave truck 30, and a forward / backward moving means of the sheave truck 30.

Each overhang base 21 is fixed to the trolley truck 11 and its tip protrudes outward. That is, the overhang base 21 on the right side in the figure protrudes forward, and the overhang base 21 on the left side in the figure protrudes rearward. The sheave cart 30 is characterized in that it moves on the overhanging platform 21 so as to move away from or approach the girder 1.

In Fig. 1, the right side is the position where the sheave cart 30 has advanced, and the left side is the sheave cart 30 Is shown in the retracted position. Since the front and rear guide sheave movement mechanisms 20F and 20R have the same configuration, only the rear guide sheave movement mechanism 20R will be described below.

FIG. 2 is an enlarged side view of the guide sheave moving mechanism in FIG.

As shown in FIG. 2, the overhang base 21 is fixed to the leg portion of the base force S trolley carriage 11, and the tip projects outward. The upper surface of the overhang base 21 is inclined downward toward the outside, and a rail 22 serving as a traveling road surface is attached on the inclined surface. The horizontal length X and vertical height y of this rail 22 are the forces S that are important technical elements for keeping the height of the hook 60 constant and reducing the driving force of the sheave cart 30. The point will be described later.

FIG. 3 is a perspective view of the guide sheave moving mechanism as viewed obliquely from above. FIG. 4 is a perspective view of the guide sheave moving mechanism as seen from an oblique rear side. FIG. 5 is a perspective view of the guide sheave moving mechanism as viewed obliquely from below. FIG. 6 is a front view of the sheave cart 30 and the hook 60. FIG. 7 is a plan view of the guide sheave shift mechanism in the sheave cart 30.

As shown in FIGS. 3 and 6, the overhang base 21 and the rail 22 are provided as a pair on the left and right. The sheave cart 30 has a pair of left and right side frames 31, 31, a central frame 32 that connects them, and a wheel 33 that is pivotally supported by the side frame 31. The wheel 33 rolls on the rail 22 of the overhang base 21.

[0015] 35 is a screw rod / nut mechanism as a forward / backward moving means.

A telescopic telescopic cylinder 36 is connected between the front end portion of the overhang base 21 and the rear end portion of the sheave carriage 30, and a screw rod and a long nut cylinder are incorporated therein. Then, when the screw rod is rotated by the motor 37 and the speed reducer 38 attached to the tip of the overhanging base 21, the screw rod advances and retreats, so that the sheave cart 30 can be advanced and retracted.

The forward / backward moving means is not limited to the screw rod / nut mechanism, and a cylinder mechanism or other advancing / retracting mechanism may be used.

As shown in FIG. 6, a guide sheave for hanging the rope is attached to the lower surface of the central frame 32 of the sheave cart 30.

45 is an equalizer comprising a horizontal beam 45a and a vertical beam 45b. The vertical beam 45b is pivotally supported by the central frame 32, and the horizontal beam 45a is pivotally supported by the vertical beam 45b. . And the equalizer sieves 41 and 42 are attached to both ends of the horizontal beam 45a. It is By shifting the equalizer sheaves 41 and 42 up and down, the deviation of the rope length between the guide sheave group (to be described later) of the sheave carriage 30 and the guide sheave 6;! -66 of the hook 60 can be eliminated. Further, fixed guide sheaves 43 and 44 are attached to the central frame 32 on both the left and right sides of the equalizer 45.

As shown in FIG. 6 and FIG. 7, four guide sheaves 5! -54 with a shift mechanism are provided on the upper surface of the central frame 32. Guide sheaves 51 and 52 are set in the first holder 55 in the first set. Guide sheaves 53 and 54 are put in the second hono-redder 56 in the second set. The first and second hono-redders 55 and 56 are passed through two guide rods 57 and 58 so as to be smoothly traversed from side to side. Further, one screw rod 59 is passed through the first and second holders 55 and 56, and nuts built in the holders are screwed together. The screw rod 59 is threaded in the opposite direction with respect to the middle point. Therefore, when the screw rod 59 is rotated forward and backward, the force S can be moved to move the first and second holders 55 and 56 closer to or away from each other. In FIG. 6, in order to avoid complication, the guide rod 58 is omitted, and each of the honorders 55 and 56 is shown in a simplified manner.

[0018] Te Figure 6 ί Nobi Rere, reference numeral 60 (or a hook, which have a six Thief ,, 61, 62, 63, 64, 65, 66 this sheave 6;. And ~ 66! The guide sheaves 4 of the sheave cart 30;! ~ 44, 51-54 (7), the force S around which a plurality of ropes R are hung, and the hung route will be described later with reference to FIG.

A winch 15 shown in FIGS. 3 and 5 has a drum 16, a motor 17, and a speed reducer 18, and the drum 16 is rotated in both forward and reverse directions by the power of the motor 17. Then, two ropes Rl and R2 are wound around one end of the drum 16 of the winch 15, and two ropes R3 and R4 are wound around the other end. When the drum 16 rotates forward and backward, the ropes R1 to R4 are unwound and unwound, and the hook 60 is raised and lowered. The rope routing route including the guide sheave group between the drum 16 and the hook 60 will be described with reference to FIG.

The rotation of the drum 16 is transmitted to the screw rod 59 via the chains 19a, 19b, 19c, and the screw rod 59 is rotated in both forward and reverse directions. For this reason, the groups of the loops Rl and R2 and the groups of the ropes R3 and R4 are aligned with the positions where the drums 16 are drawn from the drum 16. As a result, the first and second holders 55 and 56 move to the left and right, so that the ropes R1 to R4 are not distorted.

In FIG. 8, two ropes Rl and R2 force S extend from one end side of the drum 16 of the winch 15, and another two ropes R3 and R4 extend from the other end side. The ropes Rl and R2 are actually one continuous rope, and the middle is wrapped around the sheave 41 of the equalizer 45. The rope R1 side is passed through the sheave 65 of the hook 60 → the sheave 43 of the sheave cart 30 → the sheave 61 of the hook 60 → the sheave 61 of the sheave cart 30 → the sheave 51 of the sheave cart 30 and is wound around the drum 16 and the rope R2 side is sheaveed the sheave of the hook 60. 62 → Sheave cart It is wound around drum 16 via sheave 52 of 30.

[0021] In addition, the ropes R3 and R4 are actually a series of ropes, and halfway through the equalizer 45 sheave

It is wrapped around 42. Then, rope R3 side, hook 60 sheave 66 → sheave cart 30 sheave 44 → hook 60 sheave 64 → sheave cart 30 sheave 54, and it is wrapped around drum 16 and rope R4 side force hook 60 Sheave 63 → Sheave cart 30 After sheave 53, it is wound around drum 16.

[0022] The rope wrapping route described above has four ropes from the drum 16 to the sheave cart 30, and 12 ropes between the sheave cart 30 and the hook 60, and the ratio of the number of ropes is 1: 3.

The ratio of the number of ropes is not limited to 1: 3, but may be 1: 2 or less, or 1: 4 or more.

Next, a method of using the hoisting devices 14F and 14R according to the present embodiment will be described with reference to FIG.

Yes

In each of the hoisting devices 14F and 14R, when the drum 16 of the winch 15 is rotated and the ropes R1 to R4 are fed out, the hook 60 can be lowered, and the drum 16 is rotated in the reverse direction to wind the rope R;! If you take it, you can raise the hook 60 force S.

If the hooks 60, 60 of the two front and rear hoisting devices 14F, 14R are moved up and down in synchronization, both ends of the load can be hung and handled with the level maintained. In addition, in the two front and rear hoisting devices 14F and 14R, if the winding amount of the ropes R1 to R4 is changed, the height between the front and rear hooks 60 and 60 changes, and the force S can be tilted. . [0024] As shown in Fig. 1, when the sheave cart 30 of the front guide sheave moving mechanism 20F is advanced and the sheave cart 30 of the rear guide sheave moving mechanism 20R is retracted, both the front and rear hooks 60, 60 are moved forward. Moving. Conversely, when the front sheave cart 30 is moved backward and the rear sheave cart 30 is advanced, both the front and rear hooks 60, 60 move rearward.

By using this movement, the bridge crane itself does not move, and the force S can be moved forward and backward slightly. In addition, when the main trolley and the auxiliary trolley are suspended, the suspended load can be swiveled by slightly moving the main trolley back and forth, so the cargo handling work can be performed efficiently.

Based on FIG. 9, the above-mentioned small turning operation will be described in detail. In the figure, B1 is an installed hull block, and a new hull block B2 is suspended by the main trolley 10 and the auxiliary trolley 5 of the bridge crane C of the present invention. When the bridge crane C is moved forward and the hull block B2 is brought close to the existing hull block B1, even if one of the end faces is aligned with each other, the other end face may not be aligned and a slight gap d may occur. In such a case, when the sheave cart 30 of the rear hoisting device 14R is retracted (in the arrow Ab direction), the hull block B2 can turn slightly in the arrow Ar direction to match the end faces. According to the present invention, such a small turning can be easily performed, so that it is easy to finely align heavy objects such as assembling a hull block at a shipyard, and work efficiency is improved.

[0026] In addition, when the front and rear sheave carts 30, 30 are moved forward, the distance Dw between the two hooks 60, 60 increases, and when the front and rear sheave carts 30, 30 are moved backward, the two hooks Since the distance Dn between 60 and 60 becomes narrow, there is an advantage that an appropriate suspension position can be selected according to the size of the transport block.

[0027] In the guide sheave moving mechanism 20F, 20R of the present invention, the length and height of the rail 22 of each overhang base 21 are large for keeping the height of the hook 60 constant and for driving the sheave carriage forward and backward. Since there is technical significance in the point that driving is not required, this point will be described in detail below. In the above embodiment, the rail 22 is installed at an inclined force. As described above, the horizontal length X and the vertical height y are set to 3: 1. The ratio is 12 ropes from to 60 hooks and 4 ropes from drum 16 to 30 sheave carts. [0028] (Hook 60 height retention)

With the above configuration, the guide sheave 4 of the sheave cart 30 that is generated when the drum 16 is stopped and the sheave cart 30 is moved back and forth. Equivalent amount is absorbed by moving 30 to a lower position. Therefore, since the height of the hook 60 does not change, only a slight horizontal feed is possible without changing the height of the suspended load. For this reason, in the work of assembling hull blocks, etc., which are large in weight at the shipyard, to the hull under construction, there is an effect that positioning can be easily performed.

[0029] (Sheave cart 30, driving force)

FIG. 10 is an explanatory view of the balance of rope tension in the bridge crane of the present invention. As shown in the figure, the rope tension balance V is as follows.

Sheave cart 30 sheave 5;! ~ 54 → tension to drum 16 fh = l

Sheave 5 of the sheave cart 30;! To 54 → Sheave 6 of the hook 60;! To 66 tension fv = 3 In the above case, the combined force Fh and tension fv is perpendicular to the rail 22 of the overhang 21 Will act.

This means that even if the hook load increases or decreases, the applied load to the motor 37, which is the forward / backward moving means of the sheave cart 30, does not change. For this reason, the motor 37 does not need to give a large driving force even when a large load is suspended on the hook 60, which only supports the load that the sheave cart 30 tries to roll down the slope of the overhanging platform 21.

[0030] (Other Embodiments)

Next, another embodiment of the present invention will be described.

The ratio between the horizontal length X and the vertical height y of the rail 22 described above must be matched to the ratio of the number of windings of the rope, and the number of ropes Y between the drum 16 and the guide sheave 5 in the sheave cart 30; And sheave cart 30 guide sheave 4;! ~ 44 and hook 60 guide sheave 5;! ~ 54 ropes between _: =: Must be 丫.

For example, if the number of ropes Y: the number of ropes X is 1: 2, the horizontal length X and the vertical height y of the rail 22 can be set to 1: 2, and the number of ropes Y: the number of ropes X is 1. If 4: 4, the horizontal length X and vertical height y of rail 22 should be 1: 4. [0031] In the above embodiment, the hoisting device and the guide sheave moving mechanism are provided for the front and rear, but only the front or rear equipment may be provided.

In addition, a guide sheave moving mechanism may be provided on only one of the hoisting device for the front and the rear.

Even in these configurations, the distance between the front and rear hooks 60 can be expanded and contracted, so the amount of movement of the suspended load is half that of the installation on both sides, but a slight back-and-forth movement is possible, and the combination of the main and auxiliary trolleys is possible. There is an advantage that a small turning movement is possible in the suspension.

Furthermore, such a bridge crane which does not require the auxiliary trolley 5 is also included in the present invention.

Industrial applicability

[0032] The bridge-type crane of the present invention can easily perform a slight back-and-forth movement and a small turning movement of the suspended load. Therefore, the positioning force S for large suspended loads such as building a hull by the block method is easy and accurate. It can be done.

Brief Description of Drawings

FIG. 2 is an enlarged side view of the guide sheave moving mechanism in FIG.

FIG. 3 is a perspective view of the guide sheave moving mechanism as viewed obliquely from above.

FIG. 4 is a perspective view of the guide sheave moving mechanism as viewed obliquely from the rear.

FIG. 5 is a perspective view of the guide sheave moving mechanism as viewed obliquely from below.

FIG. 6 is a front view of a sheave cart 30 and a hook 60.

FIG. 7 is a plan view of a guide sheave shift mechanism in the sheave cart 30.

[Fig. 8] Rope routing diagram between drum 16, sheave cart 30 and hook 60

FIG. 9 is an explanatory diagram of a small turning operation in the bridge crane of the present invention.

FIG. 10 is an explanatory view of rope tension balance in the bridge crane of the present invention.

FIG. 11 is a side view of a conventional main trolley.

FIG. 12 is a perspective view of a conventional bridge crane.

Explanation of symbols Girda

Main trolley

Trolley trolley winch

Drum

Guide sheave moving mechanism

口 4 mouths

Lenore

Sheave cart wheel

Forward / reverse means--44 Guide sheave-54 Guide sheave

-66 sieves

Claims

The scope of the claims

[1] A bridge crane with a main trolley traversing on the girder,

A hoisting device and a guide sheave moving mechanism are provided on the trolley cart of the main trolley,

The hoisting device comprises a winch, a rope that is unwound from the winch, and a hook around which the rope is wound.

The guide sheave moving mechanism includes a guide sheave around which the rope is wound, and a moving mechanism for moving the guide sheave forward and backward in a direction perpendicular to the longitudinal direction of the girder.

A bridge crane characterized by that.

[2] The moving mechanism comprises an overhanging base fixed to the trolley bogie, a sheave bogie running on the upper surface of the overhanging bogie, and a forward / backward moving means of the sheave bogie.

The base of the overhang base is fixed to the trolley carriage, and the tip of the overhang base projects in a direction perpendicular to the longitudinal direction of the girder,

The guide sheave is attached to the sheave cart.

The bridge crane according to claim 1, wherein:

[3] The traveling path of the sheave carriage in the overhanging base is inclined downward from the proximal end toward the distal end, and the ratio of the horizontal length and the vertical height of the traveling path is determined between the guide sheave and the hook. The number of ropes between and the ratio of the number of ropes between the guide sheave and the winch

The bridge crane according to claim 2, wherein:

[4] The hoisting device and the guide sheave moving mechanism are provided for the front and the rear, respectively, and the front guide sheave mechanism is installed on the front side of the girder and is used for the rear guide sheave. The mechanism is installed on the rear side of the girder.

The bridge crane according to claim 1, wherein: