JP2012193031A - Crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a trolley which moves a transported material storage body, to miniaturize the trolley, and to reduce the weight thereof in a crane which hoists the transported material storage body storing the transported material and moves the transported material storage body in the vertical direction and the lateral direction for loading.SOLUTION: In the crane 1, seesaw type link mechanisms 30A and 30B as a turning mechanism for a straw basket type carrier 6 are provided on a main trolley 10. The seesaw type link mechanisms 30A and 30B have simple structures including links 31a and 31b and support shafts 32a and 32b. By this, in comparison with the case of using a cylinder device as a turning mechanism for the straw basket type carrier 6, the structure of the main trolley 10 can be simplified and miniaturized, and the weight thereof can be reduced.

Description

  The present invention relates to a hoist, and more specifically, a hoist that lifts a hauled object container in which a hauled object is accommodated by power, and moves in the vertical and lateral directions to perform cargo handling, and moves the hauled object container. The present invention relates to a hoist capable of simplifying the structure of a trolley and reducing the size and weight.

  A mocco-type hoist has been proposed as a hoist for handling bulk cargo (conveyed items) on a bulk carrier moored at a port.

  This mocco-type hoist is a device that handles bulk cargo such as grains, ore, coal, or mold using a transport bag called mocco formed in a square shape by cloth or a steel net. When the mocco is used, it is light and easy to handle and can be carried so as to wrap the bulk cargo, so that the bulk cargo can be handled in a stable state.

  As an example of such a mocco, there is a configuration in which a bulk cargo in the mocco is unloaded at once by pulling up a reverse rope provided on the bottom surface of the mocco and turning the mocco upside down (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 5-75270

  However, the present inventors have found that the mocco hoist has the following problems. Although FIG. 23 is not publicly known, it shows a perspective view of a main part of a crane 50 which is a hoist examined by the present inventor, and the outline thereof is as follows.

  Wire ropes 52 a to 52 d wound around the first and second wire drums 51 a and 51 b of the crane 50 are sheaves 54 a to 54 d installed on the pylon 53 and sheaves 56 a to 56 d installed on the sub trolley 55. The sheaves 58a to 58d installed on the main trolley 57 are connected to the mocco 59 in order.

  The pylon 53 and the main trolley 57 are provided with cylinder devices 60a to 60d, 61a to 61d such as hydraulic cylinders, etc., so that the sheaves 54a to 54d and 58a to 58d can be moved in the horizontal direction. It is possible. The cylinder devices 60a to 60d on the pylon 53 are connected to the power source, but the cylinder devices 61a to 61d on the main trolley 57 are not connected to the power source, and the tension changes of the wire ropes 52a to 52d are used as power. As it works passively.

When turning the mocco 59, the cylinder devices 60a to 60d on the pylon 53 are driven to move the pair of sheaves 54a and 54c or the pair of sheaves 54b and 54d on the pylon 53 in opposite directions. The cylinder devices 61a to 61d on the main trolley 57 are passively driven according to changes in the tension of the ropes 52a and 52c or the pair of wire ropes 52b and 52d, and the pair of sheaves 58a, 58c or the sheave 58b on the main trolley 57. , 58d move in opposite directions to each other, so that a pair of wire ropes 52a, 5d
The force applied to each of 2c or the wire ropes 52b and 52d changes, and the mocco 59 turns.

  However, in this crane 50, since the cylinder devices 61a to 61d are installed on the main trolley 57 as the turning mechanism of the mocco 59, there is a problem that the structure of the main trolley is complicated and the weight is increased.

  Further, when using a light weight such as the mocco 59 as the transported object container, even if the cylinder devices 60a to 60d on the pylon 53 are driven, the load difference between the wire ropes 52a to 52d is small, and the main trolley 57 Since the sliding resistance of the upper cylinder devices 61a to 61d is larger than the tension of the wire ropes 52a to 52d, the sheaves 58a to 58d on the main trolley 57 may not move and the mocco 59 cannot be turned. There is a problem.

  An object of the present invention is to simplify the structure of a trolley for moving a transported material container in a hoist that lifts a transported material body that stores a transported material by power and moves it in the vertical and horizontal directions to perform cargo handling. Another object of the present invention is to provide a hoist capable of realizing a reduction in size and weight.

  Another object of the present invention is to improve the swivel operation of the transported object container in a hoist that lifts the transported object container that stores the transported object by power and moves it up and down and laterally to perform cargo handling. It is in providing the hoist which can be performed.

In order to achieve the above object, the hoist according to the present invention lifts a transport object container that stores a transport object in a first direction that is a vertical direction, and moves it in a second direction that intersects the first direction. In the hoist that performs cargo handling in the first direction, a bridge girder portion extending in the second direction at a position away from the ground in the first direction, and in the second direction in a state where the transported article container is suspended from the bridge girder portion. A main trolley installed movably, a sub trolley installed in the bridge girder so as to be movable in the second direction apart from the main trolley, and a plurality of suspension ropes connected to the carrying container A hoisting rope hoisting machine, and a turning mechanism for turning the transported object container in a plane intersecting the first direction, each of a plurality of suspension cables connected to the transported object container, A first pulley group installed in the main trolley, and the auxiliary trolley; The second pulley group installed and the third pulley group installed on the bridge girder are connected to the suspension hoisting machine via the pulleys in order, and the turning mechanism includes the third pulley group. A first turning means for actively moving at least a pair of pulleys in the pulley group in opposite directions, and a pair of suspensions associated with moving the pair of pulleys in the third pulley group in opposite directions. A second means for turning configured to move the pair of pulleys of the first pulley group, on which the pair of suspension ropes are hooked, in accordance with a change in the tension of the rope, in a direction opposite to each other. The second means is a hoist configured to move the pair of pulleys of the first pulley group in opposite directions by swinging the swinging body in the direction around the rotation axis.

  Moreover, in the above hoist, the transported article container is a transport bag. That is, the second means for turning the transport bag of the main trolley is configured to move the pair of pulleys of the first pulley group on the main trolley in opposite directions by swinging the swing body around the rotation axis. As a result, the sliding resistance can be reduced, and a large power can be obtained with a small force by utilizing the lever principle. For this reason, even when using a transport bag such as a light weight mocco or the like, the pair of first pulleys of the main trolley can be moved with a small suspension cable load difference. It can be carried out.

  Further, in the hoist described above, the transported article container includes a hanging tool to which the hanging rope is connected, and a carrying bag suspended below the hanging tool.

  In the hoist described above, each of the pair of suspension ropes is connected so as to have a diagonal positional relationship with each other in the upper part of the transported object container.

  In the hoist described above, the second turning means includes a link that is the rocking body and a support shaft that pivotally supports the link in a rotatable state. One end of the first pair of pulleys is connected, and the other end of the link in the longitudinal direction is connected to the other of the first pair of pulleys.

  According to the hoist of the present invention, in the hoist that lifts the transported object container that stores the transported object in the first direction that is the vertical direction, and moves the second object in the second direction intersecting the first direction to perform cargo handling. The second means for turning the main trolley is configured to move the pair of pulleys of the first pulley group in a direction opposite to each other by swinging in the direction around the rotation axis of the swing body, Since a cylinder device or the like is not used as the second turning means, the structure of the main trolley can be simplified and the size and weight can be reduced.

1 is an overall configuration diagram of a crane that is a hoist according to an embodiment of the present invention. It is the principal part perspective view which showed the principal part of the crane of FIG. 1 typically. It is a top view of the pylon part of the crane of FIG. It is a side view of a pylon part from the B direction of FIG. It is a top view of the sub trolley of the crane of FIG. FIG. 6 is a side view of the auxiliary trolley as viewed from the direction B in FIG. 5. It is a top view of the main trolley of the crane of FIG. It is a side view of the main trolley seen from the B direction of FIG. It is a side view of the main trolley seen from the C direction of FIG. It is a top view at the time of the drive of the main trolley of FIG. It is a top view at the time of the drive of the main trolley of FIG. It is a top view which shows the modification of the main trolley of the crane of FIG. It is a top view of the main trolley which removed and showed one of the seesaw type link mechanisms of FIG. It is a side view of the main trolley seen from the B direction of FIG. It is a side view of the main trolley seen from the C direction of FIG. It is a principal part perspective view at the time of the cargo handling work of the crane of FIG. It is a principal part perspective view at the time of the cargo handling work of the crane of FIG. It is a principal part perspective view at the time of the turning operation | work of the crane of FIG. It is a principal part perspective view at the time of the turning operation | work of the crane of FIG. It is a principal part perspective view of the crane which is the hoist which is other embodiment of this invention. It is an internal block diagram of the hanging tool of the crane of FIG. It is a principal part perspective view at the time of the turning operation | work of the crane of FIG. It is a principal part perspective view of the crane which this inventor examined.

  Hereinafter, a hoist according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows an overall configuration of a crane 1 which is a hoist according to the present embodiment. In the following description, for convenience, the first direction which is the vertical direction is indicated by the Z-axis direction, and the second direction intersecting (orthogonal) with this is indicated by the X-axis direction.

  The crane 1 mocks a bulk cargo (carrying material) 5 such as grain, ore, coal, or a type fence between a bulk carrier 3 moored on the quay 2 and a temporary storage 4 on the quay 2. Body, carrying bag) 6 is lifted by power in the Z-axis direction and moved in the X-axis direction for cargo handling.

  Here, a bridge-type crane is illustrated as the crane 1, but the present invention is not limited to this, and various applications are possible. For example, an overhead crane or a jib crane (such as a crane or a retractable crane) is applied. good. The transported goods are not limited to bulk cargoes and can be variously changed. For example, earth and sand or garbage may be used as the transported goods.

  The crane 1 includes sea and land-side leg portions 8a and 8b standing in the Z-axis direction on the upper surface of the quay 2 and a bridge girder portion (girder extending in the X-axis direction so as to bridge these leg portions 8a and 8b. Part) 9.

  These leg portions 8 a and 8 b are installed in a state where they can travel on the upper surface of the quay 2. Moreover, the bridge girder part 9 has a girder 9a provided between the leg parts 8a and 8b, and a boom 9b extending to the sea side from the girder 9a. Although not particularly limited, the height from the upper surface of the quay 2 to the girder 9a is, for example, about 30 m, the total length in the longitudinal direction of the bridge girder portion 9 is, for example, about 100 m, from the hold 3a of the bulk carrier 3 to the boom 9b. The distance is about 10 m, for example.

  On the bridge girder portion 9, a main trolley 10 and a sub trolley 11 are installed so as to be able to traverse (move) in the X-axis direction and to be separated from each other. The main trolley 10 is a moving body that moves the mocco 6 in the X-axis direction by traversing the bridge girder 9 while the mocco 6 is suspended. Below the main trolley 10, a driver's seat 12 for operating movement of the mock 6 in the Z-axis direction and the X-axis direction is installed.

  Further, on the bridge girder 9, a pylon (post) 8 c is installed at a portion intersecting with the leg 8 b so as to be inclined with respect to them. Each of the main trolley 10, the auxiliary trolley 11, and the pylon 8c is provided with a plurality of sheaves (pulleys) as described later.

  A machine room 15 is installed on the bridge girder 9. The machine room 15 is provided with a first wire drum 15a and a second wire drum 15b. The first and second wire drums 15a and 15b are suspension rope hoists that lift the mocco 6 in the Z-axis direction through the wire ropes 16 wound around each of the first and second wire drums 15a and 15b. Each of the first and second wire drums 15a and 15b is connected to a drum driving motor and a reduction gear. The electric power is supplied to the electric motor by a power supply facility (not shown) installed on the quay 2.

  The wire rope 16 unwound from the wire drums 15a and 15b is connected to the mocco 6 through the sheaves of the pylon 8c, the auxiliary trolley 11 and the main trolley 10 in this order. By laying the wire rope 16 like this, the engagement force between the sheaves of the pylon 8c, the auxiliary trolley 11 and the main trolley 10 and the wire rope 16 can be increased. For this reason, the wire rope 16 can be unwound and wound smoothly, and a problem that the wire rope 16 is detached from the sheave can be prevented. Therefore, the wire rope 16 can be unwound and wound at high speed, and the main trolley 10 can be traversed at high speed, so that the efficiency of the cargo handling work can be improved. Here, the auxiliary trolley 11 having a plurality of sheaves may be fixed to the bridge girder 9 or the pylon 8c.

Next, the principal part of the crane 1 will be described in detail with reference to FIGS. In addition,
In the following description, the direction orthogonal to the X-axis direction is indicated as the Y-axis direction.

  FIG. 2 schematically shows a perspective view of the main part of the crane 1. As shown in FIG. 2, the mocco 6 is formed of, for example, a steel or cloth net, and the planar shape thereof is formed in, for example, a square shape having a side of about 6 m. Rope connecting portions 17a to 17d are provided at the corners of the mocco 6, and wire ropes 16a to 16d (16) are connected to the respective rope connecting portions 17a to 17d.

  The mocco 6 can be moved in the X-axis and Z-axis directions while being supported by the four wire ropes 16a to 16d, and can be turned in the rotation direction R that rotates about the Z-axis. . Α and β indicate the turning angle of the mocco 6 and are not particularly limited. For example, the turning angle may be within a predetermined range of ± 45 degrees or more with respect to the X axis. It is possible.

  Of the four wire ropes 16a to 16d, the two wire ropes 16a and 16d connected to the rope connecting portions 17a and 17d are arranged on the outermost sides of the main trolley 10, the sub trolley 11, and the pylon 8c. It is wound up around the first wire drum 15a through the two sheaves 20a, 20d, 21a, 21d, 22a, 22d in this order.

  On the other hand, the two wire ropes 16b, 16c connected to the rope connecting portions 17b, 17c of the mocco 6 are two sheaves 20b, 20c arranged inside each of the main trolley 10, the sub trolley 11, and the pylon 8c, It is wound up around the second wire drum 15b through 21b, 21c, 22b and 22c in this order.

  Of the four wire ropes 16a to 16d, one pair is formed by the wire ropes 16a and 16c connected to the rope connecting portions 17a and 17c that are diagonally opposite to each other in the mocco 6; One pair is formed by the wire ropes 16b and 16d connected to the rope connection portions 17b and 17d located at the corners.

  Note that, below the main trolley 10, link bars 24 are connected between the wire ropes 16a and 16d and between the wire ropes 16b and 16c, respectively. Accordingly, the opening width of the mocco 6 is defined, and the wire ropes 16a to 16d are not detached from the sheaves 20a to 20d. Reference numerals 6a and 6b denote discharge edges of the mocco 6.

  Next, FIG. 3 is a plan view of the pylon 8c portion in the initial state of the crane 1, and FIG. 4 is a side view of the pylon 8c portion viewed from the direction B of FIG. The initial state of the crane 1 refers to a state when the cargo handling operation or turning operation of the mocco 6 is not performed.

  As shown in FIGS. 2 to 4, four sheaves (third pulleys) 22 a to 22 d are arranged side by side in the axial direction on the pylon 8 c. Each sheave 22a-22d is contained in each case 25a-25d in a rotatable state.

  Out of the four sheaves 22a to 22d, the outermost two sheaves 22a and 22d are arranged at a distance L from the adjacent central sheaves 22b and 22c to the sea side and the land side, respectively. Thereby, interference between the wire ropes 16a and 16b adjacent to each other and between the wire ropes 16c and 16d can be prevented, and the wire ropes 16a and 16d and the wire ropes 16b and 16c are balanced in a substantially parallel state. Can keep.

Of the four sheaves 22a to 22d, one pair is formed by the sheaves 22a and 22c on which the pair of wire ropes 16a and 16c is laid, and the other pair of wire ropes 16b.
, 16d, one pair is formed by sheaves 22b, 22d.

  Such sheaves 22a to 22d are connected to expansion / contraction devices (first means for turning) 26a to 26d, respectively. The expansion devices 26a to 26d are devices that turn the mocco 6 of FIG. 2 in the rotation direction R, and are formed by, for example, a hydraulic cylinder device, a pneumatic cylinder device, or an electric cylinder device.

  The rods 26ar to 26dr of the expansion devices 26a to 26d can expand and contract in the X-axis direction. The rods 26ar to 26dr are connected to the cases 25a to 25d of the sheaves 22a to 22d. As a result, the sheaves 22a to 22d can reciprocate in the X-axis direction.

  Of the telescopic devices 26a to 26d, the pair of telescopic devices 26a and 26c connected to the pair of sheaves 22a and 22c are such that the telescopic rods 26ar and 26cr expand and contract in opposite directions in the X-axis direction when the mocco 6 is turned. The pair of sheaves 22a and 22c are controlled so as to move in directions opposite to each other in the X-axis direction.

  On the other hand, the pair of telescopic devices 26b and 26d connected to the pair of sheaves 22b and 22d, when the mocco 6 is turned, the telescopic rods 26br and 26dr expand and contract in opposite directions in the X-axis direction, and the pair of sheaves 22b, 22d is controlled to move in opposite directions in the X-axis direction.

  When a hydraulic cylinder device is used as the expansion / contraction devices 26a to 26d, the head side and the rod side of the pair of expansion / contraction devices are connected by hydraulic piping, and when the rod of one hydraulic cylinder device extends, the other hydraulic cylinder Set the device rod to automatically retract. The expansion and contraction devices 26a to 26d are not limited to the cylinder device and can be variously changed. For example, a seesaw type link mechanism described later may be used. Thereby, while being able to simplify the structure of an expansion-contraction apparatus, it can be reduced in size and weight. Further, the maintenance work can be facilitated as compared with the cylinder device.

  Next, FIG. 5 is a plan view of the auxiliary trolley 11, and FIG. 6 is a side view of the auxiliary trolley 11 viewed from the direction B of FIG. As shown in FIGS. 2, 5, and 6, four sheaves (second pulleys) 21 a to 21 d are arranged in the sub trolley 11 side by side in the axial direction in a state where the respective rotational shaft positions are matched. Yes. The sheaves 21a to 21d are included in the cases 27a to 27d in a rotatable state.

  7 is a plan view of the main trolley 10, FIG. 8 is a side view of the main trolley 10 viewed from the B direction in FIG. 7, and FIG. 9 is a main trolley 10 viewed from the C direction orthogonal to the B direction in FIG. The side view of is shown.

  As shown in FIGS. 2 and 7 to 9, four sheaves (first pulleys) 20 a to 20 d are arranged in the axial direction in the main trolley 10. The sheaves 20a to 20d are included in the cases 28a to 28d in a rotatable state.

  As described in the pylon 8c portion, the outermost two sheaves 20a and 20d of the main trolley 10 are also arranged at a distance L from the central sheaves 20b and 20c adjacent to them on the sea side and the land side, respectively. Has been. Thereby, interference between the wire ropes 16a and 16b adjacent to each other and between the wire ropes 16c and 16d can be prevented, and the wire ropes 16a and 16d and the wire ropes 16b and 16c are balanced in a substantially parallel state. Can keep.

  Among the sheaves 20a to 20d, one pair is formed by the sheaves 20a and 20c on which the pair of wire ropes 16a and 16c is hung, and one pair is formed by the sheaves 22b and 22d on which the pair of wire ropes 16b and 16d is hung. Yes.

  The pair of sheaves 20a and 20c are connected to each other by a seesaw-type link mechanism (second turning means) 30A, and move in opposite directions in the X-axis direction when the mocco 6 is turned. . Similarly, the pair of sheaves 20b and 20d are connected to each other by a seesaw-type link mechanism (second turning means) 30B, and move in opposite directions in the X-axis direction when the mocco 6 is turned. ing.

  This seesaw type link mechanism 30A, 30B is a device for turning the mocco 6 of FIG. 2 in the rotation direction R, and includes links (oscillators) 31a, 31b, support shafts 32a, 32b, and rods 33a, 33b. Have.

  The links 31a and 31b are installed so as to be swingable along a horizontal plane formed by the XY axes with the support shafts 32a and 32b as the center. The support shafts 32a and 32b are erected on the base 10a of the main trolley 10, and are spaced apart so as not to disturb the swinging motion of the links 31a and 31b.

  One end in the longitudinal direction of the link 31a of the link mechanism 30A is connected to the case 28a via one rod 33a, and the other end in the longitudinal direction of the link 31a is connected to the case 28c via the other rod 33a. Similarly, one end of the link 31b in the link mechanism 30B in the longitudinal direction is connected to the case 28b through one rod 33b, and the other end in the longitudinal direction of the link 31b is connected to the case 28d through the other rod 33b. ing.

  One end of each of the rods 33a and 33b and one end of each of the links 31a and 31b are connected so as to be rotatable along a horizontal plane formed by the XY axes. The other ends of the rods 33a and 33b and the cases 28a to 28d are connected so as to be rotatable along a horizontal plane formed by XY axes.

  Here, the expansion and contraction devices 26a to 26d of the pylon 8c are provided with a hydraulic pump, a pneumatic pump, or the like as a power source, whereas the seesaw type link mechanisms 30A, 30B are provided with a hydraulic pump, a pneumatic pump, or the like. Such a power source is not provided, and the tension applied to the wire ropes 16a to 16d is balanced by using the tension change of the wire ropes 16a to 16d by driving the expansion devices 26a to 26d of the pylon 8c as a power source. It is designed to follow the drive.

  However, a sudden swing of the links 31a and 31b may be suppressed by providing a damper in the link mechanisms 30A and 30B.

  Next, FIGS. 10 and 11 show a driving state of the seesaw type link mechanism 30A. Since the driving of the link mechanism 30B is the same, the description is omitted.

  As shown in FIG. 10, when the link 31a of the link mechanism 30A swings counterclockwise (counterclockwise), the sheave 20a of the pair of sheaves 20a, 20c The sheave 20c moves linearly toward the land side in the X-axis direction (right direction in FIG. 10) as indicated by the arrow E, while moving linearly to the side (left direction in FIG. 10).

On the other hand, as shown in FIG. 11, when the link 31 of the link mechanism 30 </ b> A swings clockwise (clockwise), the sheave 20 a of the pair of sheaves 20 a and 20 c moves in the X-axis direction as indicated by an arrow F. Whereas the sheave 20c moves linearly to the land side (right direction in FIG. 11), the sheave 20c moves linearly to the land side in the X-axis direction (left direction in FIG. 11) as indicated by an arrow G.

  Thus, the following effects can be obtained by using the seesaw-type link mechanisms 30A and 30B as the mocco turning mechanism of the main trolley.

  When a cylinder device is used as a mocco turning mechanism on the main trolley 10, the structure is complicated and the main trolley 10 is increased in size and weight, and the moving speed is decreased. When 30B is used, the structure of the mechanism can be simplified. Moreover, since the main trolley 10 can be reduced in size and weight, the moving speed of the main trolley can be increased.

  Further, when a cylinder device is used as a mocco turning mechanism on the main trolley 10, the cylinder position changes due to a fluid pressure leak, so that it is necessary to reset the cylinder position, which requires troublesome and complicated maintenance work. On the other hand, when the seesaw type link mechanisms 30A and 30B are used, the reset operation of the cylinder position can be eliminated, so that the maintenance operation can be simplified.

  In addition, the seesaw type link mechanisms 30A and 30B have a simple configuration and a small scale as compared with the cylinder device. Therefore, even if this is introduced, the configuration of the existing crane 1 is not significantly changed. For this reason, compared with the case where a cylinder apparatus is installed in the main trolley 10, cost can be reduced.

  Furthermore, when the seesaw-type link mechanisms 30A and 30B are used, the sliding resistance can be reduced, and a large power can be obtained with a small force because the rotational force (the lever principle) is used. For this reason, even when the light weight of the mocco 6 is used, the sheaves 20a to 20d of the main trolley 10 can be moved by a small rope load difference between the pair of wire ropes 16, so that the turning operation of the mocco 6 is performed well. be able to.

  Next, modified examples of the arrangement of the seesaw type link mechanisms 30A and 30B of the main trolley 10 are shown in FIGS. 12 is a plan view of the main trolley 10, FIG. 13 is a plan view of the main trolley 10 with the seesaw-type link mechanism 30A of FIG. 12 removed, and FIG. 14 is a side view of the main trolley 10 viewed from the direction B of FIG. FIGS. 15A and 15B show side views of the main trolley 10 viewed from the direction C in FIG.

  Here, a case where the links 31a and 31b of the seesaw type link mechanisms 30A and 30B are laid out in a plane (XY axis plane) is illustrated. The support shaft 32 a of the seesaw type link mechanism 30 </ b> A is erected on the ceiling portion 10 b of the main trolley 10. On the other hand, the support shaft 32 b of the seesaw type link mechanism 30 </ b> B is erected on the base 10 a of the main trolley 10.

  In this case, since the support shafts 32a and 32b do not interfere with the rotation of the links 31a and 31b, the links 31a and 31b can be laid out in a planar manner. Thereby, the arrangement area of the seesaw-type link mechanisms 30A and 30B can be reduced, so that the main trolley 10 can be further reduced in size. Other effects are the same as described above.

  Next, the cargo handling method of the crane 1 is demonstrated with reference to FIG.1, FIG.2, FIG.16 and FIG. 16 and 17 are perspective views of the main part of the crane 1 when the bulk cargo 5 is unloaded. In FIG. 16 and FIG. 17, the illustration from the auxiliary trolley 11 to the pylon 8 c is omitted for easy understanding of the drawings.

[Example of loading operation for bulk cargo]
First, as shown in FIG. 1 and FIG. 2, when loading the bulk cargo 5 into the mocco 6, the first and second wire drums 15 a and 15 b are simultaneously driven to feed out the four wire ropes 16 a to 16 d, The mocco 6 is lowered into the hold 3a of the bulk carrier 3 to be in an unfolded state, and the bulk cargo 5 is placed on the mocco 6 by a hydraulic shovel or the like.

[Example 1 of loading and unloading bulk cargo]
Next, when unloading the bulk cargo 5 from the mocco 6, the following is performed. First, the first and second wire drums 15a and 15b are simultaneously driven to wind up the wire ropes 16a to 16d and raise the mocco 6 from the hold 3a.

  Subsequently, after the main trolley 10 is moved along the bridge girder 9 and the mocco 6 is moved above the temporary storage 4, the first and second wire drums 15a and 15b are simultaneously driven to wire ropes 16a to 16d. The mocco 6 is moved down and stopped at a preset height.

  Thereafter, as shown in FIG. 16, only the second wire drum 15b is driven to feed out the two wire ropes 16b and 16c to lower the discharge edge 6b of the mocco 6 to temporarily load the bulk cargo 5 in the mocco 6. Load it on storage 4 Alternatively, only the first wire drum 15a may be driven to wind up the two wire ropes 16a and 16d to raise the discharge edge 6a of the mocco 6 so that the discharge edge 6b on the opposite side may be lowered.

[Example 2 of loading and unloading bulk cargo]
Further, as shown in FIG. 17, only the first wire drum 15a is driven to feed out the two wire ropes 16a and 16d to lower the discharge edge 6a of the mocco 6 so that the bulk cargo 5 in the mocco 6 is temporarily moved. It may be loaded onto storage 4. Alternatively, only the first wire drum 15b may be driven to wind up the two wire ropes 16b and 16c to raise the discharge edge 6b of the mocco 6 so that the discharge edge 6a on the opposite side may be lowered.

  Thus, in the crane 1, the bulk cargo 5 can be distributed and unloaded, so that the work for leveling the bulk cargo 5 on the temporary storage 4 can be reduced.

  Next, a turning method of the mocco 6 by the crane 1 will be described with reference to FIGS. 18 and 19.

[Mokko's example of turning right]
First, as shown in FIG. 18, when turning the mocco 6 in the clockwise (rightward) rotation direction R1, the sheave 22b is moved to the land side by extending the rod 26br of the expansion device 26b of the pylon 8c. Loosen the tension of the wire rope 16b. At the same time, by contracting the rod 26dr of the expansion / contraction device 26d, the sheave 22d is moved to the sea side and the tension of the wire rope 16d is strengthened.

  At this time, as described with reference to FIG. 23, when using a light weight hanging tool such as the mocco 6, the load difference between the wire ropes 16b and 16d is small, and the cylinder device or the like is connected to the sheave of the main trolley. In this case, since the sliding resistance of the cylinder device or the like is larger than the rope tension, the sheaves 20b and 20d do not move even if the expansion devices 26b and 26d on the pylon 8c are driven, and the mocco 6 cannot be turned. is there.

  In contrast, in the crane 1 of the present embodiment, the seesaw-type link mechanism 30B is connected to the pair of sheaves 20b and 20d, so that the sliding resistance can be reduced and the rotational force (the lever) Since a large driving force can be obtained with a small force using the principle), the sheaves 20b and 20d on the main trolley 10 can be easily moved even with a small rope load difference. That is, since the wire rope 16b is relaxed while the wire rope 16d is tensioned, the link 31b of the seesaw type link mechanism 30B swings in the counterclockwise rotation direction due to this rope tension difference. The sheave 20b on which the wire rope 16d moves moves to the sea side, and the sheave 20d on which the wire rope 16d is hung on the main trolley 10 moves to the land side. Then, when the tensions of the wire ropes 16b and 16d are balanced, the movement of the sheaves 20b and 20d stops.

  As the sheaves 20b and 20d of the main trolley 10 move in this way, the torsional force F1 toward the sea side and the land in the opposite direction to the rope connecting portions 17b and 17d positioned diagonally to each other in the mocco 6 are obtained. Since the torsional force F2 is applied toward the side, the mocco 6 turns in the clockwise rotation direction R1.

[Example of left-turning operation of mocco]
Next, as shown in FIG. 19, when turning the mocco 6 in the counterclockwise (counterclockwise) rotation direction R2, the sheave 22a is moved to the land side by extending the rod 26ar of the expansion device 26a of the pylon 8c. Then, the tension of the wire rope 16a is loosened. At the same time, the rod 26cr of the telescopic device 26c is contracted to move the sheave 22c to the sea side, thereby strengthening the tension of the wire rope 16c.

  At this time, since the pair of sheaves 20a and 20c are also connected to the seesaw type link mechanism 30A, the sheaves 20a and 20c on the main trolley 10 can be moved even with a small rope load difference for the same reason as described above. That is, since the wire rope 16a is relaxed while the wire rope 16a is loosened, the link 31a of the seesaw type link mechanism 30A swings in the counterclockwise rotation direction due to this rope tension difference. The sheave 20a over which the wire rope 16c is moved moves to the sea side, and the sheave 20c over which the wire rope 16c is extended in the main trolley 10 moves to the land side. Then, when the tensions of the wire ropes 16a and 16c are balanced, the movement of the sheaves 20a and 20c stops.

  As a result, the torsional forces F1 and F2 that are opposite to each other are applied to the rope connecting portions 17a and 17c that are diagonally opposite to each other in the mocco 6, and as a result, the mocco 6 is counterclockwise opposite to that described in FIG. It turns in the rotation direction R2.

  As described above, in the crane 1 according to the present embodiment, the mocco 6 can be satisfactorily swiveled during the handling operation (see FIGS. 16 and 17) of the bulk cargo 5 described above. Thereby, since the bulk cargo 5 can be finely dispersed and loaded, the leveling work of the bulk cargo 5 can be reduced. Therefore, the efficiency of unloading work of the bulk cargo 5 can be improved. Moreover, automation of the unloading work of the bulk cargo 5 can be promoted.

  In the description of FIG. 18 and FIG. 19, the case where the pair of telescopic devices 26b and 26d and the pair of telescopic devices 26a and 26c are driven has been described for the purpose of simplifying the respective turning operations. In each turning operation, a pair of telescopic devices such as driving the other pair of telescopic devices 26a and 26c when driving the pair of telescopic devices 26b and 26d for the purpose of maintaining the balance of the tension of the wire ropes 16a to 16d. The other pair of expansion and contraction devices may be driven while driving.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS.

FIG. 20 shows a modification of the main part of the crane 1 shown in FIG. Out of the four sheaves 22a to 22d installed in the pylon 8c, the outermost two sheaves 22a and 22d form one pair, and are connected to the expansion devices 26a and 26d, respectively, and are mutually connected in the X-axis direction. It moves to the opposite side. On the other hand, the two inner sheaves 22b and 22c are arranged side by side with their respective rotational axes in a fixed state so as not to move in the X-axis direction.

  Out of the four sheaves 20a to 20d arranged in the main trolley 10, the outermost two sheaves 20a and 20d form one pair and are connected to the seesaw type link mechanism 30A in the same manner as described above. And move to opposite sides in the X-axis direction. On the other hand, the two inner sheaves 20b and 20c are arranged side by side with their respective rotational axes in a fixed state so as not to move in the X-axis direction.

  Furthermore, a hanging tool 35 is provided between the main trolley 10 and the mocco 6 in a state of being hung by wire ropes 16a to 16d. The wire ropes 16a to 16d are connected to rope connection portions 36a to 36d disposed in the vicinity of the four corners of the upper surface of the hanging tool 35, respectively. The mocco 6 is suspended by wire ropes 37 a to 37 d that are unwound from the hanging tool 35.

  Next, FIG. 21 shows an internal configuration of the hanger 35. An electric motor M is installed inside the hanging tool 35. The electric motor M is connected to the third wire drum 39a and the fourth wire drum 39b via the speed reducer 38. The power supply to the motor M is performed by an engine generator (not shown) provided in the hanger 35, and the rotation of the third and fourth wire drums 39a and 39b is controlled by a control device having a brake mechanism (not shown). It has become so.

  The rotation shaft 38a of the speed reducer 38 is a rotation shaft common to the third and fourth wire drums 39a and 39b, and the third and fourth wire drums 39a and 39b are simultaneously rotated in the same direction. .

  The wire ropes 37a and 37b wound around the third wire drum 39a are connected to the rope connecting portions 17a and 17b of the mocco 6, respectively. Further, the wire ropes 37c and 37d wound around the fourth wire drum 39b are connected to the rope connecting portions 17c and 17d of the mocco 6, respectively. When the wire ropes 37b and 37c are wound, the wire ropes 37a and 37d are unwound, and when the wire ropes 37b and 37c are unwound, the wire ropes 37a and 37d are wound.

  When unloading the bulk cargo 5 of the mocco 6, the third and fourth wire drums 39a. By rotating 39b by the electric motor M, one of the discharge edges 6a and 6b of the mocco 6 is lowered.

  Next, a turning method of the mocco 6 by the crane 1 according to the second embodiment will be described with reference to FIG.

[Example of left-turning operation of mocco]
In order to turn the mocco 6 in the counterclockwise (counterclockwise) rotation direction R2, the rod 26ar of the expansion device 26a of the pylon 8c is extended and the sheave 22a is moved to the land side to loosen the tension of the wire rope 16a. The rod 26dr of the expansion device 26d is contracted and the sheave 22d is moved to the sea side to strengthen the tension of the wire rope 16d.

As a result, the wire rope 16a is loosened while the wire rope 16d is tensioned as described above, and the link 31a of the seesaw type link mechanism 30A is caused by this rope tension difference.
As a result, the sheave 20a on which the wire rope 16a is hung on the main trolley 10 moves to the sea side, and the sheave 20d on which the wire rope 16d is hung on the main trolley 10 moves to the land side. Then, when the tensions of the wire ropes 16a and 16d are balanced, the sheaves 20a and 20d stop moving.

  At this time, in the same manner as described above, the rope connecting portions 36a and 36d located diagonally to each other in the hanging tool 35 are subjected to twisting forces directed to the opposite sides. As a result, the hanging tool 35 and the mocco 6 hung thereon are shown in FIG. It turns about 90 ° in a counterclockwise rotation direction R2 with respect to 20. Here, in 2nd Embodiment, since the range which can turn at once can be enlarged rather than the above-mentioned case, the bulk cargo 5 can be more disperse | distributed and loaded.

  The turning angle of the mocco 6 can be changed by the amount of expansion / contraction of the rods 26ar, 26dr of the expansion / contraction devices 26a, 26d, and can be, for example, 120 ° or more. That is, since the turning angle of the mocco 6 can be changed in a wide range according to the transport environment and transport conditions of the mocco 3, the flexibility and applicability of the transport process by the mocco 3 can be improved.

[Mokko's example of turning right]
In order to turn the mocco 6 clockwise (clockwise), in FIG. 20, the rod 26ar of the expansion device 26a of the pylon 8c is contracted and the sheave 22a is moved to the sea side to increase the tension of the wire rope 16a. The rod 26dr of the device 26d is extended and the sheave 22d is moved to the land side to loosen the tension of the wire rope 16d.

  As a result, as described above, the wire rope 16a is tensioned while the wire rope 16d is loosened. As a result, the link 31a of the seesaw type link mechanism 30A swings in the clockwise direction due to this rope tension difference. The sheave 20a on which the wire rope 16a is hung on the trolley 10 moves to the land side, and the sheave 20d on which the wire rope 16d is hung on the main trolley 10 moves to the sea side. As a result, similar to the above, the rope connecting portions 36a and 36d located diagonally to each other in the hanging tool 35 are subjected to twisting forces in opposite directions, so that the hanging tool 35 and the mocco 6 hung thereon are shown in FIG. It turns about 90 ° in a clockwise rotation direction with respect to 20.

  The hoist according to the present invention is a hoist that lifts a transport container containing a transported object in a first direction that is a vertical direction and moves in a second direction intersecting the first direction to perform cargo handling. The second means for turning the trolley is configured to move the pair of pulleys of the first pulley group in a direction opposite to each other by swinging the swinging body in the direction around the rotation axis. Since a cylinder device or the like is not used as the second means, the main trolley can be simplified and reduced in size and weight, so that it can be used for a hoist such as a crane.

1 Crane (hoist)
5 Bulk cargo (transportation)
6 Mocco (container for carrying goods, carrying bag)
8a, 8b Leg 8c Pylon 9 Bridge girder 9a Girder 9b Boom 10 Main trolley 10a Base 10b Ceiling 11 Sub trolley 12 Driver's seat 15 Machine room 15a, 15b Wire drum (rope hoisting machine)
16, 16a-16d Rope (hanging rope)
17a to 17d Rope connecting portions 20a to 20d Sheave (first pulley group)
21a-21d sheave (second pulley group)
22a-22d sheave (third pulley group)
24 link bars 26a to 26d telescopic device (swivel device, first means for swivel)
26ar-26dr Rod 30A, 30b Seesaw type link mechanism (swivel device, second means for swivel)
31a, 31b link (oscillator)
32a, 32b Support shafts 33a, 33b Rod 35 Suspension tool (container)
36a to 36d Rope connecting portions 37a to 37d Wire rope 38 Reducer 39a Third wire drum 39b Fourth wire drum

Claims (5)

In a hoist that lifts a transport container containing a transport object in a first direction that is a vertical direction, moves in a second direction intersecting the first direction, and performs cargo handling,
A bridge girder extending in the second direction at a position away from the ground in the first direction;
A main trolley installed so as to be movable in the second direction in a state where the carrying object is suspended from the bridge girder,
A sub trolley installed away from the main trolley;
A hoisting rope hoisting machine for hoisting a plurality of hoisting ropes connected to the carrying object container;
A turning mechanism for turning the carrying container in a plane intersecting the first direction,
A plurality of suspension ropes connected to the transport container are respectively placed on the first pulley group installed in the main trolley, the second pulley group installed in the auxiliary trolley, and the bridge girder part. While connecting each pulley with the installed third pulley group in order to the suspension rope hoisting machine,
The turning mechanism includes first turning means for actively moving at least a pair of pulleys in the third pulley group in opposite directions;
The pair of pulleys of the first pulley group on which the pair of suspension ropes are engaged with each other due to the change in tension of the pair of suspension ropes caused by moving the pair of pulleys of the third pulley group in opposite directions to each other. A second means for turning configured to move following the reverse direction,
A hoist configured such that the second means for turning is configured to move a pair of pulleys of the first pulley group in directions opposite to each other by swinging the swinging body in a direction around a rotation axis.   The hoist according to claim 1, wherein the transport object container is a transport bag.   The hoist according to claim 1, wherein the transported object container includes a hanging tool to which the hanging rope is connected and a carrying bag suspended below the hanging tool.   The hoist according to any one of claims 1 to 3, wherein each of the pair of suspension ropes is connected so as to have a diagonal positional relationship with each other at an upper portion of the transported object container. The second turning means includes a link that is the rocking body, and a support shaft that pivotally supports the link in a rotatable state.
One end of the link in the longitudinal direction is connected to one of the pair of pulleys of the first pulley group, and the other end of the link in the longitudinal direction is connected to the other of the pair of pulleys of the first pulley group. The hoist according to any one of claims 1 to 4.

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