JP2017065859A - Quay crane and roping method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unloader capable of lengthening the life of a rope by inhibiting a deterioration in the stretched rope, and a roping method for the unloader.SOLUTION: Ropes R1-R4 paid out from drums D1-D4 are looped along a peripheral surface from the downsides of sheaves S1-S4 installed at an end of a boom, stretched toward sheaves S11, S21, S31 and S41 arranged in a trolley 5 from the upsides of the sheaves S1-S4, looped along the peripheral surface from the upsides of sheaves S11, S21, S31 and S41, and stretched downward to be connected to a cargo handling tool 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a quay crane having a configuration in which a rope is fed from a drum to a trolley via a sheave installed at an end of a boom extending in the sea-land direction, and a rope hanging method for a quay crane, and more particularly The present invention relates to a quay crane that can suppress the deterioration of the rope to be extended and prolong the life of the rope, and a rope hanging method of the quay crane.

  Various quay cranes (unloaders) have been proposed for use when unloading bulk cargo such as coal or iron ore from bulk carriers (see, for example, Patent Document 1).

  Document 1 connects the ropes fed from each of the four drums to a grab bucket (hereinafter sometimes referred to as a bucket), and rotates the four drums in a mutually related state, thereby moving the bucket up and down. An unloader that traverses the trolley and opens and closes the bucket is proposed.

  The unloader described in Document 1 includes a boom and a girder extending in the sea-land direction, a sea-side sheave installed at the sea-side end of the boom, and a land-side sheave installed at the land-side end of the girder. I have. The rope drawn out from the drum is hung along the circumferential surface from the upper side of the sea side sheave or the land side sheave, and is stretched from the lower side of the sheave toward the sheave installed in the trolley.

  The rope fed out from the sea side or the land side sheave is hung along the peripheral surface from the upper side of the sheave installed in the trolley, and is stretched and connected to the bucket disposed below the trolley.

  In the unloader described in Literature 1, the bending direction of the rope at the sea side or the land side sheave is opposite to the bending direction of the rope at the sheave installed in the trolley. Hereinafter, the state in which the bending direction of the rope is reversed may be referred to as an S-shaped bending state. The rope arranged in the S-shaped bending state is repeatedly bent in different directions as the trolley traverses and the bucket moves up and down. Therefore, the deterioration of the rope is easy to proceed, and it is difficult to realize the long life of the rope.

International Publication No. 98/06657

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a quay crane capable of suppressing the deterioration of a rope to be stretched and extending the life of the rope, and a rope hanging method of the quay crane. It is in.

A quay crane according to the present invention that achieves the above object includes a boom extending in a sea-land direction, a sheave installed at an end of the boom, a drum that feeds a rope toward the sheave, and the boom. In the quay crane comprising a trolley that traverses and traverses, and a sheave arranged on the trolley and receiving the rope from the upper side and feeding it from the lower side, the rope fed from the drum is installed on the end of the boom. It is received from the lower side of the sheave, is wound around the circumferential surface of the sheave, and is sent out from the upper side of the sheave to the sheave disposed in the trolley.

  A rope hanging method for a quay crane according to the present invention includes a boom extending in a sea-land direction, a sheave installed at an end of the boom, a drum that feeds the rope toward the sheave, and a traverse along the boom. In the rope hanging method of a quay crane comprising a trolley to be mounted, a sheave arranged on the trolley to receive the rope from the upper side and fed from the lower side, and a cargo handling equipment suspended below the trolley, the rope is fed from the drum. The rope is hung from the lower side of the sheave installed at the end of the boom along the peripheral surface, and is stretched from the upper side of the sheave toward the sheave arranged in the trolley. It is characterized in that it is hung from the upper side of the sheave along the peripheral surface and stretched downward to be connected to the cargo handling equipment.

  The quay crane according to the first aspect of the present invention includes a boom and a girder that extend in the sea-land direction, and a pair of sea-side sheaves and a pair of land-side ends that are installed at the sea-side ends of the boom and girder. A land side sheave, a pair of sea side drums that extend a sea side rope toward the sea side sheave, a pair of land side drums that extend a land side rope toward the land side sheave, and the boom and girder In the quay crane comprising a trolley that traverses and traverses, and four sheaves that are arranged on the trolley and receive the seaside rope or the landside rope from the upper side and feed out from the lower side, the seaside rope fed out from the seaside drum Is received from the underside of the seaside sheave and hung along the circumferential surface of the seaside sheave before being placed on the trolley from above the seaside sheave. The land-side rope that is configured to be fed to the sheave and is fed from the land-side drum is received from the lower side of the land-side sheave and is wound around the circumferential surface of the land-side sheave, It is comprised in the state sent out to the said sheave arrange | positioned at the said trolley from the upper side of a land side sheave.

  The rope hanging method of the quay crane according to the first aspect of the present invention includes a boom and a girder extending in the sea-land direction, and a pair of sea-side sheave and a land-side end installed at the sea-side end of the boom and girder. A pair of land-side sheaves installed; a pair of sea-side drums that unwinds a sea-side rope toward the sea-side sheave; a pair of land-side drums that unwinds a land-side rope toward the land-side sheave; and the boom A trolley traversing along the girder, four sheaves arranged on the trolley for receiving the seaside rope or the landside rope from above and sending them from below, and a grab bucket suspended below the trolley A rope hanging method of a quay crane comprising: the sea side rope fed out from the sea side drum is hung along a circumferential surface from a lower side of the sea side sheave, It is stretched from the upper side of the sheave toward the sheave arranged on the trolley, is hung along the peripheral surface from the upper side of the sheave and is stretched downward to be connected to the grab bucket, and The land-side rope fed out from the land-side drum is hung from the lower side of the land-side sheave along the peripheral surface, and is stretched from the upper side of the land-side sheave toward the sheave arranged in the trolley. The sheave is hung along the circumferential surface from the upper side of the sheave and is extended downward to be connected to the grab bucket.

  A quay crane according to a second aspect of the present invention includes a boom and a girder extending in a sea-land direction, a pair of land-side sheaves installed at the land-side ends of the boom and girder, and a land facing the land-side sheave. In a quay crane comprising a pair of land-side drums for feeding out side ropes, a trolley that traverses along the boom and girder, and two sheaves that are arranged on the trolley and receive the land-side ropes from above and send them out from below The land-side rope fed out from the land-side drum is received from the lower side of the land-side sheave, is hung along the circumferential surface of the land-side sheave, and the trolley from the upper side of the land-side sheave It is comprised in the state sent out to the said sheave arrange | positioned by this.

  The rope hanging method of the quay crane according to the second aspect of the present invention includes a boom and a girder extending in the sea-land direction, a pair of land-side sheaves installed at the land-side ends of the boom and girder, and the land-side sheaves. A pair of land-side drums that feed out the land-side rope toward the trolley, a trolley that traverses along the boom and the girder, and two sheaves that are arranged on the trolley and that receive the land-side rope from the upper side and send it out from the lower side, In the rope hanging method of a quay crane provided with a spreader suspended below the trolley, the land-side rope fed out from the land-side drum is hung around a circumferential surface from the lower side of the land-side sheave. From the upper side of the land-side sheave, it is stretched toward the sheave disposed on the trolley, and is hung from the upper side of the sheave along the peripheral surface toward the lower side. Characterized in that connected to the spreader Te.

  According to the present invention, the bending direction of the rope in the sheave installed at the end of the boom or girder is the same direction as the bending direction of the rope in the sheave disposed in the trolley. Is advantageous.

  The bending direction of the rope, the land-side rope, or the sea-side rope that is fed from the drum, the land-side drum, or the sea-side drum and reaches the sheave installed in the trolley can be set to one direction. Since the bending direction of the rope is set in one direction, it is further advantageous to prolong the life of the rope.

  At least one of the pair of land-side sheaves or the pair of sea-side sheaves can be arranged in a state in which the upper side is closer to each other than the lower side.

  According to this configuration, the pair of ropes that are received from the drum to the sea side or the land side sheave are stretched outside the pair of ropes that are sent from the sea side or the land side sheave to the trolley. It can suppress that the rope accepted by the sheave and the rope sent out interfere with each other. Since it becomes difficult for the ropes to come into contact with each other, it is advantageous for realizing a long life of the rope.

It is explanatory drawing which illustrates the quay crane of 1st this invention. It is explanatory drawing which illustrates the state by which the rope of the quay crane of FIG. 1 was hung. It is explanatory drawing which illustrates the quay crane of FIG. 2 by planar view. It is explanatory drawing which expands and illustrates a bucket. It is explanatory drawing which illustrates the quay crane of another embodiment by a side view. It is explanatory drawing which illustrates the quay crane of FIG. 5 by planar view. FIG. 4 is an explanatory diagram illustrating a range of a fleet angle of the sheave in FIG. 3. It is explanatory drawing which illustrates the range of the fleet angle of the sheave of FIG. It is explanatory drawing which illustrates the quay crane of 2nd this invention. It is explanatory drawing which illustrates the state by which the rope of the quay crane of FIG. 9 was hung. It is explanatory drawing which illustrates the quay crane of FIG. 10 by planar view. It is explanatory drawing which illustrates the modification of the quay crane of FIG.

  Hereinafter, a quay crane and a rope hanging method for a quay crane according to the present invention will be described based on the embodiments shown in the drawings. In the drawing, the traveling direction of the quay crane is indicated by an arrow y, the sea-land direction (hereinafter sometimes referred to as the transverse direction) in which the boom of the quay crane is extended is indicated by an arrow x, and the vertical direction is indicated by an arrow z.

As illustrated in FIG. 1, a quay crane 1 according to the first aspect of the present invention includes a leg structure 2, a boom 3 and a girder 4 that are supported by the upper part of the leg structure 2 and extend in the transverse direction x, A trolley 5 that traverses in the transverse direction x along the boom 3 and the girder 4 and a cargo handling tool 6 that is disposed below the trolley 5 are provided. The cargo handling tool 6 is composed of a grab bucket (hereinafter also referred to as a bucket) 6. As illustrated in FIG. 1, the quay crane 1 that includes the bucket 6 and handles a bulk load may be hereinafter referred to as an unloader.

  A machine room 7 is disposed in the leg structure 2. The machine room 7 is disposed on the upper side of the girder 4, and the drum D around which the rope R is wound is disposed in the machine room 7. The rope R fed out from the drum D is connected to the bucket 6 via a sheave S and a trolley 5 arranged at the tip of the boom 3 and the rear end of the girder 4, respectively.

  A cab 8 that can move in the transverse direction independently of the trolley 5 is disposed at a height near the trolley 5. A controller for operating the unloader 1 by a crane operator is installed in the cab 8.

  As illustrated in FIGS. 2 and 3, four drums D around which the ropes R are wound are arranged in the machine room 7. The four drums D include a land side support drum D1, a sea side support drum D2, a land side opening / closing drum D3, and a sea side opening / closing drum D4. As illustrated in FIG. 3, each of the drums D <b> 1 to D <b> 4 includes a motor M that applies a driving force to the drum D and a speed reducer 11 that transmits the driving force of the motor M to the drum D. In the figure, the trolley 5 is indicated by a broken line for explanation.

  In this embodiment, the land side support rope R1 fed out from the lower side of the land side support drum D1 is received from the lower side of the first sheave S1 disposed at the land side end (rear end) of the girder 4, It is hung along the circumferential surface of the first sheave S1, and is arranged in a state of being sent from the upper side of the first sheave S1 to the sheave S11 arranged in the trolley 5. This land side support rope R1 is received from the upper side of the sheave S11 on the trolley 5 and is connected to the support portion 9 of the bucket 6 disposed below.

  The sea side support rope R2 fed out from the lower side of the sea side support drum D2 is received from the lower side of the second sheave S2 arranged at the sea side end (front end) of the boom 3 and is rotated around the second sheave S2. It hangs along the surface and is arranged in a state of being sent out from the upper side of the second sheave S2 to the sheave S21 arranged in the trolley 5. This seaside support rope R2 is received from the upper side of the sheave S21 on the trolley 5 and connected to the support portion 9 of the bucket 6 disposed below.

  Similarly to the above, the land side opening / closing rope R3 fed out from the lower side of the land side opening / closing drum D3 is received from the lower side of the third sheave S3 disposed at the land side end (rear end) of the girder 4, It is hung along the circumferential surface of the third sheave S3, and is arranged so as to be sent out from the upper side of the third sheave S3 to the sheave S31 arranged in the trolley 5. This land side opening / closing rope R3 is received from the upper side of the sheave S31 on the trolley 5 and connected to the opening / closing part 10 of the bucket 6 disposed below.

  The sea side opening / closing rope R4 fed out from the lower side of the sea side opening / closing drum D4 is received from the lower side of the fourth sheave S4 disposed at the sea side end (front end) of the boom 3 and is rotated around the fourth sheave S4. It is hung along the surface and is arranged in a state of being sent out from the upper side of the fourth sheave S4 to the sheave S41 arranged in the trolley 5. The sea side opening / closing rope R4 is received from the upper side of the sheave S41 on the trolley 5 and connected to the opening / closing portion 10 of the bucket 6 disposed below.

A pair of ropes R1 and R3 stretched from the land-side sheaves S1 and S3 to the sheaves S11 and S31 on the trolley 5 are a pair of ropes stretched from the land-side drums D1 and D3 to the land-side sheaves S1 and S3. Arranged inside. A pair of ropes R2 and R4 stretched from the sea side sheaves S2 and S4 to the sheaves S21 and S41 on the trolley 5 are a pair of ropes stretched from the land side drums D2 and D4 to the land side sheaves S2 and S4. It is arranged inside.

  As illustrated in FIG. 2, a land-side support rope R <b> 1 and a land-side open / close rope R <b> 3 (from which a land-side support drum R <b> 1 and a land-side open / close drum D <b> 3 are collectively referred to as a land-side drum) Hereinafter, when collectively referred to as a land-side rope), the bending direction is counterclockwise.

  When the land-side ropes R1 and R3 are wound around the land-side drums D1 and D3, they are wound around the first sheave S1 and the third sheave S3 (hereinafter sometimes collectively referred to as the land-side sheave). , And the sheaves S11 and S31 arranged on the trolley 5, the bending direction is the same direction. Hereinafter, the state in which the bending direction of the rope R is set to one direction may be referred to as a U-shaped bending state.

  Sea-side support rope R2 and sea-side opening / closing rope R4 (hereinafter collectively referred to as sea-side rope) fed out from sea-side support drum D2 and sea-side opening / closing drum D4 (hereinafter sometimes referred to as sea-side drum). The bending direction is clockwise.

  When the sea side ropes R2 and R4 are wound around the sea side drums D2 and D4, they are wound around the second sheave S2 and the fourth sheave S4 (hereinafter sometimes collectively referred to as the sea side sheave). And the sheaves S21 and S41 arranged in the trolley 5 are bent in the same direction and are in a U-shaped bending state.

  Each rope R that is fed from each drum D and reaches the trolley 5 is arranged in a U-bending state, which is advantageous in extending the rope life. Compared to a conventional rope that has been arranged in an S-shaped bent state, the rope R that is arranged in a U-shaped bent state can extend the life by about 40%.

  When the conventional rope life is about 1 to 2 years, for example, depending on the use frequency and usage method of the unloader 1, the rope life can be extended to about 1.4 to 2.8 years by adopting the configuration of the present invention. Can do. This is advantageous for reducing the maintenance cost of the unloader 1. Further, since the unloading period of the unloader 1 accompanying the rope replacement work is shortened, it is advantageous for improving the operation efficiency of the unloader 1.

  As illustrated in FIG. 4, the land side support rope R <b> 1 and the sea side support rope R <b> 2 are connected to the support portion 9 of the bucket 6, and the land side opening / closing rope R <b> 3 and the sea side opening / closing rope R <b> 4 are installed in the opening / closing portion 10. 12 and the sheave 13 installed in the support portion 9 may be connected to the support portion 9 after being hung around. In FIG. 4, the support portion 9 and the opening / closing portion 10 are indicated by broken lines for the sake of explanation.

  The land-side opening / closing rope R3 has its bending direction counterclockwise when the sheave 12 in the opening / closing portion 10 is hung around and the sheave 13 in the support portion 9 is hung around. As illustrated in FIG. 2, the bending direction of the land-side opening / closing rope R3 is counterclockwise during the period from the land-side opening / closing drum D3 to the sheave S31 on the trolley 5, so that the bending direction is counterclockwise over the entire length. Become.

Similarly, the bending direction of the sea side opening / closing rope R4 is clockwise when the sheave 12 in the opening / closing portion 10 is hung around and the sheave 13 in the support portion 9 is hung around. Become. As illustrated in FIG. 2, the seaside opening / closing rope R4 has a clockwise bending direction even from the seaside opening / closing drum D4 to the sheave S41 on the trolley 5, so that the bending direction is clockwise over the entire length.

  The land-side opening / closing rope R3 and the sea-side opening / closing rope R4 are U-bent over the entire length, which is advantageous for extending the rope life.

  The arrangement of the rope R is not limited to the above configuration. A configuration in which the bending direction of the rope R in each of the drum D and each sheave S is set in one direction as much as possible is acceptable. The position and number of sheaves S to be arranged can be changed as appropriate. The bucket 6 illustrated in FIG. 4 may be arranged in a state where the bucket 6 is turned by 90 ° about the vertical direction z. At this time, the open / close ropes R3 and R4 extending from the drum D to the trolley 5 are set in one bending direction in a plane formed by the transverse direction x and the vertical direction z, and the traveling direction is within the range from the trolley 5 to the bucket 6. The bending direction is set to one direction in a plane formed by y and the vertical direction z. That is, the open / close ropes R3 and R4 are not in an S-curved state in which the bending direction is reversed, which is advantageous in extending the life of the rope R.

  As illustrated in FIGS. 5 and 6, the pair of land-side sheaves S <b> 1 and S <b> 3 may be arranged such that the upper side is closer to each other than the lower side of the land-side sheaves S <b> 1 and S <b> 3. Moreover, you may make it the structure which arrange | positions a pair of sea side sheaves S2 and S4 in the state which mutually made the upper side approached compared with the lower side of sea side sheaves S1 and S3. In FIG. 5, the trolley 5 is indicated by a broken line for explanation.

  As illustrated in FIG. 5, the pair of land-side sheaves S <b> 1 and S <b> 3 are arranged in a state where the rotation axis is inclined 45 degrees in the vertical direction z from the horizontal. The distance in the traveling direction y between the lower ends of the pair of land-side sheaves S1 and S3 is longer than the distance in the traveling direction y between the upper ends. The angle at which the pair of land-side sheaves S1 and S3 are inclined is not limited to 45 degrees and can be changed as appropriate.

  By arranging the sheave S at an angle, the rope R extending from the drum D to the sheave S and the ropes extending from the sheaves S1 to S4 to the sheave 5 as illustrated in FIG. The distance in the running direction y with R can be increased. It is advantageous for suppressing the rope R received by the sheaves S1 to S4 and the rope R fed from the sheaves S1 to S4 from coming into contact with each other when worn by slack or the like. The life of the rope R can be extended by suppressing the wear.

  The above effect is obtained in the same manner when the distance in the traveling direction y between the upper ends of the pair of land-side sheaves S1 and S3 is longer than the distance in the traveling direction y between the lower ends. be able to.

  Not only a configuration in which both the land-side sheaves S1 and S3 and the sea-side sheaves S2 and S4 are inclined, but only one of them is inclined and the other is arranged without being inclined as illustrated in FIG. It may be.

  As illustrated in FIG. 5, the land-side or sea-side sheave S is inclined and arranged to receive the rope R received by the sheaves S1 to S4 and the rope R fed out from the sheaves S1 to S4 in the plan view illustrated in FIG. 6. The angle formed by can be increased. Therefore, in this embodiment, it is possible to employ a drum D that is longer in the axial direction of the rotation shaft than the drum D of the embodiment illustrated in FIG.

The relationship between the sheave S and the drum D in FIG. 3 is shown in FIG. Drum D as illustrated in FIG.
Has a cylindrical winding portion 14 around which the rope R is wound, and flange portions 15 arranged on both sides of the winding portion 14 in the extending direction of the rotation axis C1 of the drum D. In FIG. 7, the rotation axis C1 of the drum D and the rotation axis C2 of the sheave S are indicated by a one-dot chain line, and a center line L orthogonal to the rotation axes C1 and C2 is indicated by a two-dot chain line. The drum D and the sheave S are arranged with the rotation axis C1 of the drum D and the rotation axis C2 of the sheave S being parallel to each other. In a plan view, the intersection of the rotation axis C1 and the center axis L represents the center of the drum D, and the intersection of the rotation axis C2 and the center line L represents the center of the sheave S.

  A point on the boundary line between the winding part 14 and the flange part 15 and intersecting the rotation axis C1 is connected to the center of the sheave S by a broken line. The angle formed by the broken line and the center line L is called a fleet angle. The rope R extending from the sheave S to the drum D is inclined in the extending direction of the rotation axes C1 and C2 with respect to the winding portion 14 and the sheave S of the drum D within the range of the fleet angle θ.

  If the fleet angle θ is within a predetermined range, the rope R can be prevented from falling off the sheave S, and the rope R can be wound around the drum D neatly. If the fleet angle θ exceeds the appropriate range and becomes too large, the rope R will be disengaged from the sheave S, or the rope R will not be wound around the predetermined position of the drum D, and there will be a gap between the wound ropes R. Cause troubles. The range of the fleet angle θ is determined in the range of 1.5 to 4.0 °, for example. The range of the fleet angle θ is not limited to the above, and is set in advance according to the shape of the drum D and the sheave S.

  In the embodiment illustrated in FIG. 3, in order to keep the fleet angle θ of the rope R extending from the sea side or land side sheave S to the drum D within a predetermined range, the drum D is in the direction of its rotation axis (in FIG. It is formed in a shape that is relatively short in direction y) and relatively large in diameter.

  As illustrated in FIG. 8, when the land-side or sea-side sheave S is inclined and disposed, the rotation axis C1 of the drum D is a position rotated around the center line L with respect to the rotation axis C2 of the sheave S. It becomes. That is, the rotation axis C1 of the drum D is not parallel to the rotation axis C2 of the sheave S and is a twisted position that does not intersect. In FIG. 8, the direction of the sheave S is displayed in accordance with the direction of the sheave S illustrated in FIG. In FIG. 8, a direction inclined in the vertical direction z from the traveling direction y is indicated by an arrow y ′.

  When the sheave S illustrated in FIG. 8 is disposed in the same direction as the sheave S illustrated in FIG. 7, the drum D is inclined relatively, so that the length of the drum D in the direction of the rotation axis C1 appears to be shorter than actual. In the embodiment illustrated in FIG. 8, a drum D that is longer in the direction of the rotation axis C1 than the drum D in FIG. 7 is employed even if the range of the fleet angle θ is set to be the same as in the embodiment illustrated in FIG. it can.

  Since the drum D that is long in the direction of the rotation axis C1 can be adopted, the rope R having a necessary length can be wound even if the diameter of the drum D is reduced. Since the diameter of the drum D can be made relatively small, the speed reduction ratio of the speed reducer 11 can be made smaller in the embodiment illustrated in FIG. 6 than in the embodiment illustrated in FIG. This is advantageous for realizing and reducing the manufacturing cost.

  The structure of the present invention is not limited to the unloader 1, but a quay crane including a sheave S installed on the end of the boom 3 or the girder 4 from the drum D and a rope R hung around the sheave installed on the trolley 5. Can be applied to. The quay crane in this specification refers to a crane including a quay crane that loads a container in addition to an unloader, a low profile crane that includes a sliding boom that slides in the sea-land direction, and that handles a container.

  As illustrated in FIG. 9, the quay crane 1 of the second aspect of the present invention is provided with a spreader 6 for handling a container 16 as a cargo handling tool 6. The rope R drawn out from the drum D in the machine room 7 passes through the land-side sheave S, the trolley 5 and the spreader 6 installed at the land-side end of the girder 4 to the sea-side end of the boom 3. It is fixed.

  As illustrated in FIGS. 10 and 11, a pair of drums D <b> 1 around which the ropes R <b> 1 are wound are disposed in the machine room 7. A pair of ropes R1 fed out from the lower side of the drum D1 are received from the lower side of the sheave S1 disposed at the land side end (rear end) of the girder 4 and hung along the circumferential surface of the sheave S1. Thus, the sheave S1 is arranged in a state of being sent out from the upper side of the sheave S1 to the sheave S11 arranged in the trolley 5.

  The rope R1 is received from the upper side of the sheave S11 on the trolley 5, and is arranged in a state of being sent out to the sheave S12 installed in the lower spreader 6. The rope R <b> 1 is received from the sea side of the sheave S <b> 12 arranged in the spreader 6, is hung along the circumferential surface, and is sent from the land side to the sheave S <b> 13 on the trolley 5. The rope R <b> 1 is received from the land side of the sheave S <b> 13 on the trolley 5, and is connected from above to a connector 17 that is fixed to the sea side end of the boom 3. The sheave may be installed at the sea side end of the boom 3 so that the connector 17 is fixed to the land side end of the girder 4.

  As illustrated in FIG. 10, the rope R1 fed out from the drum D1 has a bending direction counterclockwise. When the rope R1 is wound around the drum D1, when it is hung around the sheave S1, when it is hung around the sheave S11 arranged on the trolley 5, it is hung around the sheave S12 arranged on the spreader 6. , And the sheave S13 arranged on the trolley 5, the bending direction is the same direction and a U-shaped bending state is obtained. The rope R1 is bent in a U shape over the entire length, which is advantageous for extending the rope life.

  The configuration of the present invention can be applied to a low profile crane including a sliding boom 3 supported by the leg structure 2 and configured to be slidable in the sea-land direction x as illustrated in FIG. The arrangement state of the rope R in this embodiment is the same as the embodiment illustrated in FIGS. 10 and 11.

  In the quay crane 1 that handles containers, as in the case of the unloader 1 illustrated in FIG. 5, if the upper side is disposed closer to each other than the lower side of the pair of sheaves S <b> 1, S <b> 1, The same effect can be obtained.

  The position where the drum D is disposed is not limited to the above, and may be disposed between the land-side end of the girder 4 and the sea-side end of the boom 3. For example, the drum D may be arranged below the boom 3 and the girder 4, or the land side drum D <b> 1 may be arranged below the land side end of the girder 4 or the sea side end of the boom 3. Good.

DESCRIPTION OF SYMBOLS 1 Quay crane, unloader, low profile crane 2 Leg structure 3 Boom 4 Girder 5 Trolley 6 Cargo, grab bucket (bucket), spreader 7 Machine room 8 Operator's cab 9 Supporting part 10 Opening / closing part 11 Reducer 12 (In the opening / closing part) Sheave 13 (located in the support section) Sheave 14 Winding section 15 Flange section 16 Container 17 Connector D Drum D1 Land support drum D2 Sea support drum D3 Land open / close drum D4 Sea open / close drum R Rope R1 Land side support rope R2 Sea side support rope R3 Land side opening / closing rope R4 Sea side opening / closing rope S Sheave S1 First sheave S2 Second sheave S3 Third sheave S4 Fourth sheave S11, S12, S13, S21, S31, S41 Sheave θ Fleet angle

Claims (11)

A boom extending in the sea-land direction, a sheave installed at the end of the boom, a drum that feeds a rope toward the sheave, a trolley that traverses along the boom, and the rope disposed on the trolley In a quay crane equipped with a sheave that receives from above and sends out from below
The rope fed out from the drum is received from the lower side of the sheave installed at the end of the boom, is hung along the circumferential surface of the sheave, and is arranged on the trolley from the upper side of the sheave. A quay crane constructed to be sent to a sheave. A boom and girder extending in the sea-land direction, a pair of sea-side sheaves installed at the sea-side ends of the boom and girder, a pair of land-side sheaves installed at the land-side ends, and the sea-side sheave A pair of sea-side drums for feeding the sea-side rope toward the land, a pair of land-side drums for feeding the land-side rope toward the land-side sheave, a trolley traversing along the boom and girder, and the trolley In the quay crane provided with four sheaves that receive the sea side rope or the land side rope from the upper side and send out from the lower side,
The sea side rope fed out from the sea side drum is received from the lower side of the sea side sheave and is hung along the peripheral surface of the sea side sheave. Configured to be sent out to the sheave to be arranged,
The land-side rope fed out from the land-side drum is received from the lower side of the land-side sheave and is hung along the circumferential surface of the land-side sheave, and is applied to the trolley from the upper side of the land-side sheave. A quay crane configured to be sent out to the sheave to be arranged. A boom and a girder extending in a land-and-land direction, a pair of land-side sheaves installed at the land-side ends of the boom and girder, and a pair of land-side drums that extend a land-side rope toward the land-side sheaves A quay crane comprising a trolley traversing along the boom and girder, and two sheaves arranged on the trolley and receiving the land-side rope from above and feeding out from below.
The land-side rope fed out from the land-side drum is received from the lower side of the land-side sheave and is hung along the circumferential surface of the land-side sheave, and is applied to the trolley from the upper side of the land-side sheave. A quay crane configured to be sent out to the sheave to be arranged.   The bending direction of the rope, the land side rope, or the sea side rope that is fed from the drum, the land side drum, or the sea side drum and reaches the sheave installed in the trolley is set to one direction. Item 4. A quay crane according to any one of Items 1 to 3.   The quay crane according to any one of claims 2 to 4, wherein at least one of the pair of land-side sheaves or the pair of sea-side sheaves is disposed in a state in which the upper side is closer to each other than the lower side.   The quay crane according to any one of claims 2 to 4, wherein at least one of the pair of land-side sheaves or the pair of sea-side sheaves is disposed in a state in which a lower side is closer to each other than an upper side. A boom extending in the sea-land direction, a sheave installed at the end of the boom, a drum that feeds a rope toward the sheave, a trolley that traverses along the boom, and the rope disposed on the trolley In a rope hanging method of a quay crane comprising a sheave for receiving from the upper side and feeding from the lower side, and a cargo handling equipment suspended below the trolley,
The rope drawn out from the drum is hung from the lower side of the sheave installed at the end of the boom along the peripheral surface, and is stretched from the upper side of the sheave toward the sheave arranged in the trolley. A rope hanging method for a quay crane, characterized in that the rope is hung from the upper side of the sheave along the peripheral surface and stretched downward and connected to the cargo handling equipment. A boom and girder extending in the sea-land direction, a pair of sea-side sheaves installed at the sea-side ends of the boom and girder, a pair of land-side sheaves installed at the land-side ends, and the sea-side sheave A pair of sea-side drums for feeding the sea-side rope toward the land, a pair of land-side drums for feeding the land-side rope toward the land-side sheave, a trolley traversing along the boom and girder, and the trolley In the rope hanging method of a quay crane comprising four sheaves that receive the sea side rope or the land side rope from above and send out from below, and a grab bucket suspended below the trolley,
The sea side rope fed out from the sea side drum is hung from the lower side of the sea side sheave along the peripheral surface, and stretched from the upper side of the sea side sheave toward the sheave arranged in the trolley. Then, it hangs around the peripheral surface from the upper side of the sheave and stretches downward to connect to the grab bucket,
The land-side rope fed out from the land-side drum is hung from the lower side of the land-side sheave along the peripheral surface, and is stretched from the upper side of the land-side sheave toward the sheave arranged in the trolley. Then, a rope hanging method for a quay crane, wherein the rope is hung from the upper side of the sheave along the peripheral surface and stretched downward and connected to the grab bucket. A boom and a girder extending in a land-and-land direction, a pair of land-side sheaves installed at the land-side ends of the boom and girder, and a pair of land-side drums that extend a land-side rope toward the land-side sheaves A quay comprising a trolley that traverses along the boom and the girder, two sheaves arranged on the trolley, receiving the land-side rope from the upper side and sending it out from the lower side, and a spreader suspended below the trolley In the crane rope hanging method,
The land-side rope fed out from the land-side drum is hung from the lower side of the land-side sheave along the peripheral surface, and is stretched from the upper side of the land-side sheave toward the sheave arranged in the trolley. Then, a rope hanging method for a quay crane, wherein the rope is hung from the upper side of the sheave along the peripheral surface and stretched downward to be connected to the spreader.   The rope hanging method for a quay crane according to claim 8 or 9, wherein at least one of the pair of land-side sheaves or the pair of sea-side sheaves is disposed in a state where the upper side is closer to each other than the lower side.   The rope hanging method for a quay crane according to claim 8 or 9, wherein at least one of the pair of land-side sheaves or the pair of sea-side sheaves is disposed in a state in which a lower side is closer to each other than an upper side.

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