JP2003171082A - Tilt-rolling device and crane provided with the tilt- rolling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform loading work by drastically reducing or removing swiveling movement of a suspending hoisting accessory and a hoisted cargo. <P>SOLUTION: This tilt-rolling device comprises end portions in a traveling element 4 side of ropes 6b, 6d operated by a cylinder 21 functioning as a driving means, coupling members 23, 24, 25 that are made to be rigid members in a space with the cylinder 21, and rotating members 26, 27. The tilt-rolling device 20 structured in this way is structured as one structuring element of a crane hanging a hoisting accessory 5 from a trolley 4 by plural ropes 6a, 6b, 6c, 6d. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting device for tilting a lifting device and a crane equipped with the tilting device.

[0002]

2. Description of the Related Art For example, in a yard such as a harbor, a crane is used for loading and unloading containers on and from a ship or trailer, and loading and unloading containers from the ship or trailer. As a crane used for such cargo handling work, the transfer crane 1 shown in FIG. 3 will be described as an example. Further, FIG. 4 shows a partially enlarged view around the suspending tool 5 of the transfer crane 1 in FIG.

As shown in FIG. 3, the transfer crane 1 is a crane for a container, which is a container crane for stacking containers, which are suspended loads, on a container placed at a target point, and is a bridge type crane. This transfer crane 1 has a trolley 4 (traveling body) that moves in a horizontal direction along a girder 3 of a crane traveling machine body 2, and a plurality of suspenders 5 called spreaders for supporting a suspended load are provided from the trolley 4. It is suspended by a rope 6. Hanging equipment 5
Can be moved up and down by hoisting and feeding the rope 6 by the hoisting device 7 mounted on the trolley 4 or on the crane traveling body 2 at an appropriate position.
Following the horizontal movement of the crane traveling body 2, the crane traveling body 2 is translated along the girder 3.

With the transfer crane 1,
When landing a container that is a suspended load on a container at a predetermined target point and loading it, the allowable value is exceeded between the container that is a suspended load and the target point container when it is landed or packed. It is necessary to prevent horizontal displacement. Usually, the allowable value in the horizontal direction is specified to be within 25 mm in consideration of the strength of the container.

Further, when hoisting a container which is a suspended load, it is necessary to land the suspending tool 5 on the container which is a suspended load so that the positional displacement in the horizontal direction is within an allowable range. Landing so that the horizontal displacement satisfies the allowable range requires the most skill in operating the transfer crane 1 for this type of container, and
It is also a time-consuming operation for alignment. Therefore, it is difficult to automate the cargo handling work in such a container.
The operator is mainly aboard to operate the traveling of the transfer crane 1 itself, the traverse of the trolley 4, and the lifting and lowering of the hanger 5 manually.

Furthermore, when an operator loads a container, which is a suspended load, at a target position, it is necessary to adjust the tilt of the container being lifted, more specifically, the tilt of the lifting tool 5 including the twist. Such an inclination of the lifting tool 5 may change the tension of each rope by winding up and sending out a plurality of ropes 6, cause a partial difference in movement, and may cause a difference in the center of gravity due to the arrangement of cargo in the container. This is caused by a slight change in the tension generated on each rope due to the shift. Therefore, reference numeral 10 in FIG.
The tilting device as shown in FIG.
The tilting device 10 is provided near the center of the one side surface W of the trolley 4 and includes a cylinder 10a (driving means) and a driving link member 10b (driving link mechanism). Further, in order to guide the ropes 6b and 6d to the tilting device 10, sheaves 4c and 4c for tilting devices, which will be described later, are provided.
In some cases, d, 4e, and 4f (pulleys) are further provided.

With reference to FIG. 4, the handling of the ropes 6a to 6d for suspending the suspension 5 and the operation of the suspension 5 on the two ropes 6b and 6d connected to the tilting device 10 will be described. In addition, the lengthwise direction of the hanging device 5 is the traveling body 2
Since this is the same as the traveling direction of, the direction will be referred to as the front-back direction, and the front side in the drawing will be described as the front side. Further, the left-right direction when the suspending tool 5 is viewed from the front side (front side) will be described as the left-right direction of the suspending tool 5 and the trolley 4. The left-right direction in this case is the same as the transverse direction of the trolley 4.

First, the handling of the first rope 6a will be described. The first rope 6a wound around the hoisting device 7 provided on the front side of the trolley 4 is hung from the hoisting device 7 toward the hanger 5. And the first rope 6a is
To the left front side from the center on the hanger 5, in other words, through the hanger-side first sheave 5a located almost directly below where the first rope 6a is fed from the hoisting device 7, and again from here upward toward the trolley. The first fixed end F1 located at the front of the fourth side is reached and connected. In the case of such handling of the first rope 6a, the length that the first rope 6a is actually stretched is
From the hoisting device 7 to the first fixed end F1, the trolley 4
It is almost twice as high as the height H from the suspension 5 to the hanger 5.

Next, the handling of the second rope 6b will be described. The second rope 6b wound around the same hoisting device 7 as described above is hung down from the hoisting device 7 toward the hanger 5. Then, the trolley 4 which is located on the right front side of the center of the hanger 5, in other words, again above the hanger 5 via the second hive 5b on the hanger side, which is located almost directly below the second rope 6b fed from the hoisting device 7. Be led to. The second rope 6b that has reached the trolley 4 is located below the hoisting device 7 and has a rotation shaft horizontally rotatably supported by the trolley 4 via a tilting device first sheave 4c. Guided horizontally. Then, the second rope 6b passes through a second sheave 4d for a tilting device, which is located in the immediate vicinity of the first sheave 4c for a tilting device and whose rotation axis is rotatably supported by the trolley 4 in the vertical direction. It is connected to the lower end of the driving link member 10b of the tilting device 10. In the case of handling the second rope 6b as described above, the length that the second rope 6b is actually stretched is from the hoisting device 7 to the drive link member 10b, and the height H from the trolley 4 to the hanger 5 is Almost twice the distance S from the tilting device first sheave 4c to the drive link member 10b.
1 is added to the length.

Next, the handling of the third rope 6c will be described. The third rope 6c wound around the hoisting device 7 is
It is hung from the same hoisting device 7 as described above toward the hanger 5 via the trolley-side first sheave 4a on the rear side and right side of the trolley 4. The third rope 6c hung from the trolley-side first sheave 4a is located on the right rear side of the hanger 5, in other words, via the hanger-side third sheave 5c arranged opposite to the hanger-side second sheave 5b. And then folded back upward. When the third rope 6c reaches the trolley 4, this end is connected to the second fixed end F2 (fixed end) located behind the trolley 4. Such a third rope 6
In the case of handling c, the length that the third rope 6c is actually stretched is from the hoisting device 7 to the second fixed end F2, which is approximately twice the height H from the trolley 4 to the hanger 5. To
Distance S from hoisting device 7 to trolley-side first sheave 4a
Will be the added length.

Next, the handling of the fourth rope 6d will be described. The fourth rope 6d wound around the same hoisting device 7 as described above is hung from the hoisting device 7 through the trolley-side second sheave 4b on the rear side and the left side of the trolley 4 to the suspending tool 5. The fourth rope 6d hung from the trolley-side second sheave 4b is on the left rear side of the hanger 5, in other words,
The trolley 4 that is folded back via the fourth lifting sheave-side sheave 5d that is arranged so as to face the first lifting sheave-side sheave 5a, and is located above again
To reach. The fourth rope 6d reaching the trolley 4
It is guided in the horizontal direction via a third sheave for tilting device 4e which is located near the trolley-side second sheave 4b and whose rotation axis is rotatably supported by the trolley 4 in the horizontal direction.
Further, the fourth rope 6d is located on the side of the end wall W of the trolley 4 and is tilted via a fourth sheave 4f for a tilting device whose rotation shaft is rotatably supported by the trolley 4 in the vertical direction. It is connected to the upper end of the driving link member 10b of the rolling device 10. In the case of handling the fourth rope 6d as described above, the length that the fourth rope 6d is actually stretched is from the hoisting device 7 to the drive link member 10b, and the height H from the trolley 4 to the hanger 5 is Almost twice as long as the third tilting device
Distance S2 from sheave 4e to drive link member 10b
And the distance S from the hoisting device 7 to the trolley-side first sheave 4a is added.

The four ropes (6a, 6a,
6b, 6c, 6d) are hoisted and fed out by the hoisting device 7 that rotates in the same direction, so that the lifting tool 5 is moved up and down. Further, the operation of the tilting device 10 when the hanging tool 5 tilts will be described. Tilting device 10
Is for adjusting the inclination of the suspending tool by pulling in and sending out the second rope 6b and the fourth rope 6d, which are two ropes diagonally arranged on the suspending tool 5.

The drive link member 10b provided in the tilting device 10 shown in FIG. 4 is located substantially at the center of the end wall W, which is the right side surface of the trolley 4, and the vicinity of the center of the member is horizontal. It is rotatably supported by a pin P which is a rotary shaft. The cylinder 10a is located behind the drive link member 10b, and the rod side is connected to the lower end of the drive link member 10b. Of course, the second rope 6b described above is also connected to the lower end portion of the second rope 6b.
Are connected from the front side, and the cylinder 10a is connected from the rear side. On the other hand, the fourth rope 6d described above is connected to the upper end of the driving link member 10b from the rear side.

The operation of the tilting device 10 will be described. When the cylinder 10a is contracted, the drive link member 10b rotates counterclockwise on the paper surface about the pin P fixed to the trolley 4. Then, the driving link member 10b
The second rope 6b connected to the lower end and the fourth rope 6d connected to the upper end are pulled in, and the respective tensions increase. On the other hand, the first rope 6a and the third rope
The tension acting on the rope 6c is reduced. Then, in this case, the lifting tool-side second sheave 5b and the lifting tool-side fourth sheave 5d slightly move up.

On the contrary, when the cylinder 10a extends,
The drive link member 10b rotates about the pin P in the clockwise direction on the paper surface. Then, the reverse action described above acts on the hanger 5, and the tension acting on the first rope 6a and the third rope 6c increases. When the above-described tilting device 10 is operated when the suspending tool 5 is already inclined, the tension balance acting on each rope and the movement of each rope can be obtained. Is made horizontal.

[0016]

However, in the conventional tilting device 10 described above, when a heavy object such as a container is held by the hoisting tool 5, the suspended load makes a swiveling motion. . This problem arises from the fact that the lengths of the four ropes that suspend and support the suspension 5 are all different. That is, since the ropes made of the same material having the same rope diameter and the same Young's modulus are used, the change in the elongation amount due to the difference in the rope length acts on the hanger 5. Therefore, for example, when the extension amount of the third rope 6c shown in FIG. 4 becomes larger than the extension amount of the fourth rope 6d, the back side of the hanging tool 5 makes a turning motion as shown by an arrow X. Needless to say, the largest turning motion occurs when the suspended load in which a large tension is applied to each rope is suspended.

Also, the hoisting tool 5 may make a turning motion even when each rope is wound up and fed out. This is because the tension applied to each rope slightly changes due to the swing of the suspended load or the like, and when the winding and feeding are stopped or the speed is changed, the swinging motion of the hanger 5 may remain as it is. Furthermore, when the amount of extension of each rope on the front side and the rear side of the hanging device 5 is different, the swing amounts of the front and rear are different, so that the turning center of a suspended load such as a container is unlikely to be a geometric center. Therefore, it is extremely difficult for the operator to specify and operate this turning motion during the cargo handling work.

The present invention has been made in view of the above circumstances, and is a tilting device capable of significantly reducing or eliminating the turning motion of the hoisting equipment and the hoisting load to realize the efficiency of the cargo handling work. An object of the present invention is to provide a device and a crane equipped with the device.

[0019]

The present invention adopts the following means in order to solve the above problems. According to a first aspect of the present invention, a suspender that holds a suspended load is suspended and supported by at least four ropes that are suspended from a traveling body, and at least one of these ropes is provided in the traveling body. In the tilting device for changing the tilt of the hanging tool by pulling in or sending out by the driving means, a rigid body is provided between the traveling body side end portion of the rope operated by the driving means and the driving means. A member is provided.

With this structure, at least one rope connected to the drive means is connected to the drive means via the rigid member among the plurality of ropes hung toward the hanger. . The rigid member has a larger Young's modulus (longitudinal elastic modulus) in the axial direction than the rope used for suspending the suspension, and is preferably a metal member having a large cross-sectional area or a thick rope. Is. As a result, the portion into which the rigid member is inserted hardly changes due to elongation. And, for example,
Four ropes are hung from the running body, facing two by two,
Even when one of the two ropes on the one side is connected to the drive means, the rope lengths of the adjacent ropes can be made substantially the same except for the rigid member. As a result, the amount of elongation of the rope itself can be made almost the same as that of the adjacent rope, and the ropes have the same amount of elongation. As a result, even if each rope is stretched due to the tension generated in each rope, the actual length of the rope wound between the traveling body and the lifting equipment will be the same, and this will hold it on the lifting equipment and the lifting equipment. The swinging motion of the suspended load will be reduced.

According to a second aspect of the present invention, in the tilting device according to the first aspect, the ropes operated by the driving means are two ropes located diagonally of the ropes. It is characterized as being.

With this structure, the diagonally positioned ropes are connected to the driving means via the rigid members. As a result, the portion into which the rigid member is inserted hardly changes due to elongation.
Then, for example, even when four ropes are divided into two from the traveling body and hang down so as to face each other, and one rope is connected to the drive means from both sides thereof, the lengths of the adjacent ropes are It is possible to make the lengths almost the same except for the rigid member. As a result, the amount of elongation of the rope itself can be made almost the same as that of the adjacent rope, and the ropes have the same amount of elongation. As a result, even if each rope is stretched due to the tension generated in each rope, the actual length of the rope wound between the traveling body and the lifting equipment will be the same, and this will hold it on the lifting equipment and the lifting equipment. The swinging motion of the suspended load will be reduced.

According to a third aspect of the present invention, in the tilting device according to the first or second aspect, a plurality of the rigid members are provided, and the rigid members are pin-joined to form a link mechanism. It is characterized by

With such a structure, the operation of the drive mechanism is transmitted by the operation of the link mechanism made of a rigid member, and the pulling-in and sending-out operations of the ropes are performed. Further, by using a link mechanism, it becomes possible to convert the operation of the drive means in various directions and transmit the operation. Thereby, for example, when a rope is connected to the driving means in the related art, a plurality of sheaves and the like are required to change the direction, but the link mechanism complements this role. Therefore, even when the distance from the end of the traveling body to the drive means is complicated, the operation of the drive means can be accurately transmitted.

According to a fourth aspect of the present invention, a girder, a trolley capable of traversing along the girder, a hanger for holding a load below the trolley, and the hanger on the trolley. A plurality of ropes to be hung, a hoisting device that is provided on the trolley and that raises and lowers the hanging device by winding and sending out each rope, and pulling or sending out any of the ropes to suspend the rope. In a crane provided with a tilting device for changing the tilt of a tool, the tilting device is the tilting device according to any one of claims 1 to 3.

By providing the tilting device of the present invention, the rope guided from the end portion on the traveling body side to the driving means is unnecessary.
Therefore, the elongation of the rope during this period is almost eliminated by changing to a rigid member. Then, when the tilting device operates, the motion of the tilting device is transmitted to the rigid member, and further the motion is transmitted from the rigid member to the rope connected to the driving means, so that the inclination of the hanger is adjusted. Such a tilting device has a configuration that can easily lead the lengths of adjacent ropes of a plurality of ropes to be substantially equal. Therefore, even if the adjacent ropes hung from the traveling body extend to each other due to tension, the ropes can be supported with the same amount of extension, and the actual rope lengths to the ropes can be made equal to each other. It becomes possible to do.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the vicinity of a lifting tool 5 of a transfer crane according to an embodiment of the present invention. 2A is a schematic configuration diagram illustrating the configuration of the tilting device 20. Note that FIG. 1 and FIG.
The configuration shown in (a) is the same as that of the conventional transfer crane 1 (see FIGS. 3 and 4) except for the tilting device 20, so the same reference numerals are used and the description thereof is omitted. Note that FIG. 2B will be described later as a modified example of this embodiment.

In FIG. 1, reference numeral 20 indicates a tilting device. The tilting device 20 is provided on a trolley 4 (traveling body) that moves horizontally on a girder 3 (see FIG. 3), and each sheave 5 is attached to a hanging tool 5 called a spreader that supports a suspended load.
Of the four ropes wound via a to 5d, two diagonal ropes 6b and 6d are connected from both sides.

In the following description, the lengthwise direction of the hanger 5 is the same as the traveling direction of the traveling machine body 2 (see FIG. 3), so this direction will be referred to as the front-back direction, and the front side in the drawing will be referred to as the front side. . In addition, the left-right direction when the suspending tool 5 is viewed from the front side (front side) is the suspending tool 5 and the trolley 4.
Will be described as the left-right direction. The left-right direction in this case is the same as the transverse direction of the trolley 4.

The structure of the tilting device 20 will be described with reference to FIG. The tilting device 20 includes a cylinder 21 (driving means), a driving link member 22 (rigid member), three connecting members 23, 24 and 25 (rigid member), and two rotating members 26 and 27. (Rigid member) and these rotating members 26,
Each pin 26a, 27a for rotatably supporting the 27 and a pin 22a for rotatably supporting the drive link member 22 are configured. Further, the tilting device 20 is
In some cases, the structure further includes tilting device sheaves 4g and 4h for guiding the ropes 6b and 6d to the tilting device 20.

The cylinder 21 is provided near the center of one side surface W of the trolley 4, and the bottom side (tube side) is fixed to the trolley 4. The rod side of the cylinder 21 is connected to the lower end portion of a drive link member 22 described later by a pin (not shown).

Like the cylinder 21, the drive link member 22 is provided near the center of one side surface W of the trolley 4 and on the rod side of the cylinder 21. The trolley 4 is provided at the center of the drive link member 22.
A pin 22a for fixing to is attached to the driving link member 22 so that the driving link member 22 can rotate in parallel with the one side surface W. Further, holes (not shown) are formed in the upper and lower ends of the driving link member 22, and a first connecting member 23 (rigid member) described later is rotatably attached to the holes of the lower end by a pin 23b. A second connecting member 24 (rigid member), which will be described later, is rotatably attached to the hole at the upper end by a pin 24b.

One end of the first connecting member 23 is connected to the lower end of the driving link member 22 via a pin 23b, and the other end is formed into an inverted L-shape.
It is rotatably attached to the end of 6 via a pin 23a. The shape of the first connecting member 23 is a length having a distance between the drive link member 22 and the position where the second rope 6b reaches the trolley 4 side from the hanging tool 5 (the end on the traveling body side). It is formed. The material of the first connecting member 23 has a Young's modulus in the axial direction (longitudinal elastic modulus) larger than that of the rope used for suspending the hanging device,
It is formed by a rod-shaped member having a large cross-sectional area.

The central portion of the first rotating member 26 has the pin 2
It is rotatably attached to the right front side of the trolley 4 by 6a. Then, as described above, one end of the first rotating member 26 is connected to the first connecting member 23 via the pin 23a, and the other end is connected to the second rope 6b for hoisting the hanging device 5. In the vicinity of the first rotating member 26, tilting device-side first sheaves 4g for guiding the connected second ropes 6b to the lower hanging device 5 side are provided with a predetermined interval.

One end of the second connecting member 24 is connected to the upper end of the drive link member 22 via a pin 24b, and the other end is L-shaped, which is a second rotating member 27.
Is rotatably attached to the end of the pin via a pin 24a. The shape of the second connecting member 24 is a position where the fourth rope 6d reaches the trolley 4 from the hanging tool 5 (end on the traveling body side).
And the drive link member 22 are formed to have a length that substantially has a distance in the traveling direction of the traveling machine body 2. Also,
The material of the second connecting member 24 is also formed by a rod-shaped member having a large Young's modulus, like the first connecting member.

The center of the second rotary member 27 is the pin 2
It is rotatably attached to the right rear side of the trolley 4 by 7a. Then, as described above, one end of the second rotating member 27 is connected to the second connecting member 24 via the pin 24a, and the other end is connected to the end of the third connecting member 25 via the pin 25a. It

The third connecting member 25 is formed of a rod-shaped member similar to the other connecting members described above. And the length of the 3rd connection member 25 is a position where the 4th rope 6d reaches | attains the trolley 4 from the lifting tool 5 (travel body side edge part),
The trolley 4 is formed to have a length that substantially has a distance in the transverse direction of the trolley 4 from the drive link member 22. One end of the third connecting member 25 is connected to the above-described second rotating member 27 via the pin 25a, and the other end is connected to the fourth rope 6d for suspending the hanging device 5. In the vicinity of the end of the third connecting member 25 to which the fourth rope 6d is connected,
Second tilting device side that guides the fourth rope 6d to the lower hanging device 5 side
The sheave 4h is provided with a predetermined space.

Next, using FIG. 1, the handling of the ropes 6b and 6d connected to the tilting device 20 and the respective ropes 6 will be described.
The operation of the tilting device 20 connected to b and 6d will be described. The second rope 6 wound around the hoisting device 7 as in the conventional case
b is hung from the hoisting device 7 toward the hanger 5. Then, the trolley 4 which is located on the right front side of the center of the hanger 5, in other words, again above the hanger 5 via the second hive 5b on the hanger side, which is located almost directly below the second rope 6b fed from the hoisting device 7. Be led to. The second rope 6b guided to the trolley 4 is located below the hoisting device 7, and further, via the first sheave 4g for the tilting device, which is rotatably supported by the trolley 4 in the horizontal direction of the rotating shaft. Be guided horizontally. Then, the second rope 6b is connected to the end of the inverted L-shaped first rotating member 26 that is located in the immediate vicinity of the tilting device first sheave 4g.

In the case of handling the second rope 6b as described above, the length of the second rope 6b actually stretched is from the hoisting device 7 to the first rotating member 26, and the height of the trolley 4 to the lifting tool 5 is increased. It is almost twice as large as H. This length is the same as the length of the first ropes 6a wound so as to be adjacent to each other.

On the other hand, the fourth rope 6d wound around the same hoisting device 7 is hung down from the hoisting device 7 toward the hanger 5 via the trolley-side second sheave 4b on the trolley 4. The fourth rope 6d hung from the trolley-side second sheave 4b is located on the left rear side of the hanger 5, in other words, via the hanger-side fourth sheave 5d arranged opposite to the hanger-side first sheave 5a. To reach the trolley 4 above again. The fourth rope 6d reaching the trolley 4 is located in the vicinity of the trolley-side second sheave 4b, and the rotation shaft is rotatably supported by the trolley 4 in the horizontal direction.
It is guided in the horizontal direction via h. Then, the fourth rope 6d guided horizontally is connected to the end portion of the third connecting member 25 described above.

In the case of handling the fourth rope 6d as described above, the length that the fourth rope 6d is actually stretched is from the hoisting device 7 to the end of the third connecting member 25, and the trolley 4
Is approximately twice the height of the hanging device 5, and the distance S from the hoisting device 7 to the trolley-side second sheave 4b is added. This length is the third rope 6 wound so as to be adjacent to each other.
The length is equivalent to c.

The tilting device 2 constructed as described above.
Depending on 0 and the handling of each rope, the hanger 5 will perform the following operations. When the cylinder 21 shown in FIGS. 1 and 2 is contracted, the drive link member 22 rotates counterclockwise on the paper surface around the pin 22a fixed to the trolley 4. Then, the first connecting member 23 connected to the lower end portion of the drive link member 22 is pulled toward the cylinder 21, and rotates the first rotating member 26 clockwise as viewed from above. By the rotation of the first rotating member 26, the second rope 6b is pulled in, the lifting-device-side second sheave 5b of the lifting device 5 rises, and the tension of the second rope 6b increases.

At the same time as the cylinder 21 shrinks,
The upper end of the drive link member 22 rotates to the front side of the trolley 4, the second connecting member 24 connected to this upper end is pulled in, and the second rotating member 27 is viewed from above with the pin 27a as the center. Rotate clockwise. Then, the third connecting member 25
Is pulled in, and the fourth rope 6d is pulled in via the second sheave for tilting device 4g. As a result, the fourth rope 6d is pulled upward together with the second rope 6b, so that the lifting tool side fourth sheave 5d of the lifting tool 5 rises together with the lifting tool side second sheave 5b, and the tension of the fourth rope 6d is increased. Will increase.

Due to the change and movement of the tension between the second rope 6b and the fourth rope, the first diagonally located first rope 6b
The tension between the rope 6a and the third rope 6c also changes,
A balance of tension in each rope 6a-6d is obtained. Therefore, the balance of the suspending tool 5 is adjusted as in the conventional case, and an action of making the inclination of the suspending tool 5 horizontal occurs.

On the other hand, when the cylinder 21 extends, the upper end of the drive link member 22 rotates to the rear side of the trolley 4,
The second connecting member 24 connected to the upper end portion is sent out, and the second rotating member 27 rotates counterclockwise around the pin 27a as viewed from above. Then, the third connecting member 25 is pushed out toward the second sheave 4g for the tilting device, and the fourth rope 6d is sent out. As a result, the fourth rope 6d is lowered, and the tension of the fourth rope 6d is reduced.

At the same time when the cylinder 21 extends,
The upper end of the drive link member 22 rotates to the rear side of the trolley 4, the second connecting member 24 connected to this upper end is pushed out, and the second rotating member 27 is viewed from above with the pin 27a as the center. Rotate counterclockwise. Then, the third connecting member 2
5 will be pushed out, and the 4th rope 6d will be sent out via the 2nd sheave 4g for tilting devices. As a result, the fourth rope 6d is sent downward together with the second rope 6b, so that the fourth rope 6d together with the second rope 6b.
The tension of d will decrease.

Each rope 6 connected to these tilting devices 20
By changing the tensions of b and 6d, the tensions of the other two ropes 6a and 6c also change, and the balance of the tensions of all the ropes 6a to 6d and the movement of each rope can be obtained. Therefore, the balance of the suspending tool 5 is adjusted, and the action of trying to make the inclination of the suspending tool 5 horizontal occurs.

The front side 2 for suspending and supporting the suspender 5
Since the ropes 6a and 6b of the book have the same length and are wound between the trolley 4 and the hanger 5, the amount of extension of each of the ropes 6a and 6b becomes equal by the horizontal hanger 5. The lengths of the ropes (6a, 6b) actually wound are also the same. Furthermore, since the two ropes 6c and 6d on the rear side for suspending and supporting the suspending tool 5 also have the same length and are wound between the trolley 4 and the suspending tool 5, they are horizontal. The amount of extension of each rope is also equalized by the hanging device 5, so that the ropes (6c, 6
The length of d) is also the same.

Therefore, even when a heavy load such as a container is held by the lifting tool 5, the rope lengths of the front side and the rear side of the lifting tool 5 are the same, and the turning motion of the hanging load does not occur. . Further, even if the swinging motion of the suspended load occurs due to a slight change in tension, the swing center of the suspended load becomes the geometric center of the suspended load, and therefore the operator can easily predict.

When comparing the lengths of the two ropes on the front side and the two sides on the rear side of the hanging device 5, the two ropes 6c and 6d on the rear side are longer than the two ropes 6a and 6b on the front side. Recognize.
As a result, when the suspended load is lifted, the rope 2 on the rear side
It is expected that the books will grow together. However, since a suspended load such as a container does not make a turning motion while being parallel to the traveling direction of the traveling machine body 2, there is no operational problem in the cargo handling work. Rather, since the suspended load can be landed from the lower side, it is possible to adjust the movement of the suspended load even if one side has landed once, and it can be expected that the suspended load is accurately landed.

According to the hoisting device, the device for tilting the suspended load, and the transfer crane equipped with the device described above, it is possible to eliminate or significantly reduce the turning motion of the suspended load and the like. The difficulty of the operation is reduced, and the efficiency of the cargo handling work can be realized. Also,
Even when the swing motion of the suspended load occurs, the swing center is the geometric center, so that the operator can easily predict the motion of the suspended load, and the labor of the operator can be reduced. In addition, even if the turning motion of the suspended load is almost removed and the swivel motion occurs, the motion of the suspended load can be easily predicted, so that the cargo handling work by the crane can be automatically operated. It will be possible.

Further, in order to guide the two ropes 6b and 6d to the tilting device installed near the center of the trolley 4, many sheaves are used to change the direction of the ropes. The use of many sheaves and the change of direction in three dimensions are considered to be a situation in which the wire rope is easily damaged. Each connecting member 23 in the present embodiment,
Since the number of sheaves can be significantly reduced by the link mechanism composed of 24, 25 and the rotating members 26, 27, damage to the rope can be reduced and the life of the rope can be improved.

Further, the tilting device 20 shown in this embodiment.
Can easily change and replace existing products without significantly changing the conventional tilting device 10 (see FIGS. 3 and 4), and thus existing transfer cranes that can improve the efficiency of cargo handling work are available. It is also possible to easily manufacture the product and provide it.

Further, a configuration described below may be adopted as a modified example of the tilting device 20 of the present embodiment. Figure 2 (b)
FIG. 7 is a schematic configuration diagram showing a modified example of the tilting device 20 in the present embodiment. The configuration of the present modification is different from the above-described tilting device 20 in the partial configuration of the link mechanism. Therefore, this point will be described, and the other configurations will be described with reference to FIG. Since it is the same as the transfer device 20, the same reference numerals are used and the description thereof is omitted.

In the figure, reference numeral 28 is a third rotating member (rigid member), 29 is a fourth rotating member (rigid member), and 30 is a fourth connecting member (rigid member). The fourth connecting member 30 is
One end is connected to the end of the first rotating member 26 having an inverted L shape through a pin 30a, and the other end is connected to the end of the third rotating member 26 having an inverted L shape. Pin 30b
Is rotatably attached via. The shape of the fourth connecting member 30 is formed to have a length up to the position where the tilting device-side first sheave 4g shown in FIG. 2A was provided. In addition, regarding the material of the fourth connecting member 30,
It is formed by a rod-shaped member made of the same material as the connecting member 23.

The third rotating member 28 is rotatably attached to the right front side of the trolley 4 by a pin 28a whose central portion is attached in a substantially horizontal direction. Then, as described above, one end of the third rotating member 28 is connected to the second rope 6b that hoists the hanging device 5.

The fourth rotating member 29 is rotatably attached to the left rear side of the trolley 4 by a pin 29a whose central portion is attached in a substantially horizontal direction. And the fourth
One end of the rotating member 29 is connected to the fourth rope 6d that hoists the lifting device 5, and the other end is the third connecting member 25.
It is connected and configured. That is, the third connecting member 25 shown in FIG. 2A is connected to the fourth rope 6d via the fourth rotating member 29.

The operation of the tilting device 20 thus configured will be described. When the drive link member 22 is rotated by the cylinder 21, the first rotating member 26 and the second rotating member 27 perform the same operation described in FIG.
As a result, the fourth connecting member 30 moves in the horizontal direction,
The third rotating member 28 rotates on the vertical plane. Then, the second rope 6b connected to the end of the third rotating member 28 is pulled in or sent out in the vertical direction, so that the inclination of the hanging tool 5 can be adjusted.

Also on the left rear side of the trolley 4, the third connecting member 25 is rotated by the rotation of the drive link member 22.
Moves in the horizontal direction, the fourth rotating member 29 rotates on the vertical plane. Then, the fourth rotating member 29
Since the fourth rope 6d connected to the end portion of is pulled in or sent out in the vertical direction, the inclination of the hanger 5 can be adjusted.

As described above, the tilting device-side first sheave 4g and the tilting device-side second sheave 4h shown in FIG. 2A become the third rotating member 28 and the fourth rotating member 29, respectively. As a result of the change, the length of each of the four ropes can be further equalized in the front and rear. Moreover, since the tilting device side first sheave 4g and the tilting device side second sheave 4h sheave are not used, damage to the ropes 6b and 6d guided to the tilting device 20 is suppressed, and the rope life is improved. It is possible to further aim.

Although the tilting device of the present embodiment has been described as having a structure provided for the transfer crane, of course,
The present invention is not limited to this, and may be used for other cranes for carrying suspended loads or for carrying devices.

[0062]

The tilting device of the present invention and the crane having the same described above have the following effects. According to the first aspect of the invention, the rigid member is provided between the driving means and the traveling body side end of the rope operated by the driving means provided in the tilting device. Elongation at the portion where the is inserted is removed, and it becomes possible to easily match the rope lengths.
As a result, the difference in the amount of extension of the rope that suspends the lifting equipment is suppressed, and the lifting equipment removes the turning motion of the suspended load from the base.
Or it can be significantly reduced.

According to the second aspect of the present invention, since the ropes operated by the driving means are two ropes positioned diagonally in each rope, the two ropes that are diagonally liable to cause a turning motion. The rope can be configured to be the same as the length of other adjacent ropes, and the same amount of extension due to tension can be obtained, so that the lifting equipment can eliminate or significantly reduce the swinging motion of the suspended load from the base. . Therefore, it is possible to provide the tilting device that does not rotate the suspended load horizontally.

According to the third aspect of the present invention, since a plurality of rigid members are provided and the link mechanism is constructed by pin-joining these rigid members, the operation of the drive means is converted to various directions and transmitted. This makes it possible to easily match the lengths of adjacent ropes. Further, the damage of the rope, which has been caused by the complicated routing of the rope, is greatly reduced, and the life of the rope can be improved.

According to a fourth aspect of the present invention, the tilting device provided in the crane is the tilting device according to any one of the first to third aspects, so that the hoisting tool is used to suspend the load from the base. It is possible to eliminate or significantly reduce the turning motion of the, and to improve the efficiency of the cargo handling work of the suspended load. In addition, since the swinging motion of the suspended load and the suspending tool is small, driving operations such as positioning of the suspended load are facilitated, which leads to reduction of operator fatigue. In addition, since the swinging motion of the suspended load can be easily predicted even when the swinging motion is removed or swung, it is possible to realize automatic operation of the cargo handling work.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a configuration around a lifting tool of a transfer crane according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a tilting device according to an embodiment of the present invention, in which FIG. 2A is a schematic configuration diagram thereof,
FIG. 2B is a schematic configuration diagram showing the modified example.

FIG. 3 is an overall view illustrating a configuration of a conventional transfer crane.

FIG. 4 is a perspective view illustrating a configuration around a lifting tool in a conventional transfer crane.

[Explanation of symbols]

4 Trolley (running body) 5 suspenders 6a, 6b, 6c, 6d each rope 7 Hoisting device 20 Tilt device 21 cylinders (driving means) 22 Drive link member (rigid member) 23, 24, 25, 30 Each connection member (rigid member) 26, 27, 28, 29 Rotating members (rigid members)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kanji Obata             4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture               Inside Mitsubishi Heavy Industries Hiroshima Works

Claims (4)

[Claims] 1. A suspender for holding a suspended load is suspended and supported by at least four ropes suspended from a traveling body, and at least one of these ropes is driven by a drive means provided in the traveling body. In the tilting device that changes the tilt of the lifting device by pulling in or sending it out, a rigid member is provided between the traveling body side end of the rope operated by the driving means and the driving means. A tilting device characterized by being. 2. The tilting device according to claim 1, wherein the ropes operated by the drive means are two of the ropes diagonally located among the ropes. . 3. The tilting device according to claim 1, wherein a plurality of the rigid members are provided, and the link mechanism is configured by pin-joining the rigid members. 4. A girder, a trolley that can traverse along the girder, a suspender that holds a suspended load below the trolley, and a plurality of ropes that suspend the suspender on the trolley. A hoisting device that is provided on the trolley and that raises and lowers the hanging device by winding and sending out each rope, and a tilt that changes the tilt of the hanging device by pulling in or sending out any of the ropes. A crane equipped with a turning device, wherein the tilting device is the tilting device according to any one of claims 1 to 3.