JP2017178470A - Quay crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quay crane capable of enhancing wire replacement work efficiency.SOLUTION: A quay crane 1 comprises a fence 16 between a winch for wire replacement and drums D1 to D4 among passages for a messenger wire Wm for wire replacement in a machine room 10 where the winch 15 for wire replacement is installed. The fence is provided with a through-hole 17 for the messenger wire for wire replacement to pass through.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a quay crane, and more particularly, to a quay crane including a machine room in which a wire replacement winch is disposed.

  Conventionally, quay cranes have been used in bulk packing yards, container terminals, and the like (see, for example, Patent Document 1). The quay crane includes a wire rope (hereinafter referred to as a wire) that is fed out and wound up from each of a plurality of drums that are individually driven, a trolley that traverses the girder on the girder and sea side by a wire, And a hanger suspended to be able to move up and down. Moreover, this quay crane is equipped with the machine room which accommodates a some drum.

  Moreover, there exists patent document 2 as another prior art document relevant to this invention. Patent Document 2 discloses a technique for exchanging a wire with a new wire using a messenger wire for wire exchange when exchanging the wire of a tower crane.

  By the way, also in the conventional quay crane, exchanging a wire using a messenger wire for wire exchange is performed at the time of wire exchange. In this case, in the machine room of the quay crane, a wire exchange winch for lifting the wire exchange messenger wire to the machine room is arranged in addition to the drum described above. In addition, a fence is disposed at a portion between the wire exchange winch and the drum in the passage serving as a wire exchange messenger wire in the machine room. Therefore, when exchanging wires in a conventional quay crane, the fence is removed to remove the fence from the wire exchanging messenger wire, and then the wire exchanging messenger wire is machined with a wire exchanging winch. I pulled it up into the room and wound it around the drum.

JP 2014-189389 A JP-A-7-157284

  As described above, at the time of the conventional wire exchange, it is necessary to remove the fence and remove it from the path of the wire exchange messenger wire. Therefore, it cannot be said that the conventional wire exchange work is efficient.

  This invention is made | formed in view of the above, The objective is to provide the quay crane which can aim at the efficiency improvement of a wire exchange operation | work.

  In order to achieve the above object, a quay crane according to the present invention includes a fence at a portion between a wire exchange winch and a drum in a path of a wire exchange messenger wire in a machine room in which the wire exchange winch is arranged. In the quay crane having the above, the fence is provided with a passage hole through which the wire replacement messenger wire passes.

  According to the present invention, since the fence is provided with a passage hole through which the wire exchange messenger wire passes, it passes through the wire exchange messenger wire via the wire exchange winch without removing the fence during wire exchange. It can be wound around the drum through the hole. This eliminates the need to remove the fence and remove it from the path of the wire exchange messenger wire when exchanging the wires, so that the efficiency of the wire exchange operation can be improved.

  The above configuration includes a girder, a trolley that crosses the girder over the girder to the land side and the sea side by a wire, and a portion of the wire between the trolley and the sea side end of the girder at the time of wire replacement. It can be set as the structure provided with the wire guide to guide.

  Here, in the case of the conventional quay crane, since the wire guide is not provided, when removing the hanger from the wire at the time of replacing the wire, due to bending due to the weight of the wire or external factors such as wind, There is a possibility that a portion of the wire between the trolley and the end of the girder on the sea side droops greatly, and this drooping may cause the end of the wire to rise. On the other hand, according to this structure, since the said wire guide is provided, it can suppress that the part between the trolley in a wire and the sea side edge part of a girder droops greatly at the time of wire replacement | exchange. Thereby, since the operation | work which corrects the big droop of a wire and the operation | work which corrects the raise of the wire end part accompanying this big droop can be reduced or shortened, wire exchange work can be made more efficient.

  The said structure WHEREIN: The said wire guide may be comprised so that it can deform | transform into the state which does not interfere with the said trolley which traverses the top of the said digit, except at the time of the said wire replacement | exchange.

  According to this configuration, the wire guide is guided by the wire guide when the wire is exchanged, and the wire guide is deformed so as not to interfere with the trolley when the wire is not exchanged, thereby suppressing the interference between the wire guide and the trolley. be able to.

  According to the present invention, the efficiency of wire replacement work can be improved.

1 is a side view showing a quay crane according to Embodiment 1. FIG. It is a perspective view which shows the mechanism which drives the trolley and hanging tool shown in FIG. It is a perspective view which shows the movement operation | movement of the trolley shown in FIG. It is a perspective view which shows the raising / lowering operation | movement of the hanging tool shown in FIG. It is a perspective view which shows the opening / closing operation | movement of the hanging tool shown in FIG. Fig.6 (a) is the schematic of the state which visually recognized the inside of the machine room from the upper side. FIG. 6B is a front view of the fence viewed from the wire replacement winch side. FIG. 7A is an explanatory diagram of a quay crane according to the second embodiment. FIG. 7B is a partial schematic view of a state where the wire guide is viewed from above when the wire is exchanged. FIG.7 (c) is the partial schematic of the state which visually recognized the wire guide from the time other than the time of wire replacement | exchange. FIG. 8A to FIG. 8C are schematic views for explaining in detail the wire exchange operation of the opening and closing wire according to the second embodiment. FIG. 9 is a schematic diagram for explaining a state of exchanging the opening and closing wires of the quay crane according to the comparative example.

(Embodiment 1)
Hereinafter, the quay crane 1 which concerns on Embodiment 1 of this invention is demonstrated, referring drawings. Regarding the drawings, the dimensions are changed from the actual product so that the configuration is easy to understand, and the ratio of the thickness, width, length, etc. of each member and each component does not necessarily match the actual product ratio. Not necessarily.

  The quay crane 1 according to the present embodiment shown in FIG. 1 is an unloader, specifically, a rope trolley type unloader. In FIG. 1, the left side is the sea side and the right side is the land side. The quay crane 1 is connected to a leg 3 having a traveling device 2 that enables the quay crane 1 to travel along the quay, a girder 4 supported by the leg 3, and an end of the girder 4 on the sea side so as to be raised and lowered. The boom 5 is provided. Hereinafter, the girder 4 and the boom 5 are collectively referred to as a beam 6.

  Further, the quay crane 1 includes a trolley 7 that traverses the girder 6 to the land side and the sea side, and a hanging tool 8 that is suspended from the trolley 7 so as to be lifted and lowered. Although the specific kind of the hanging tool 8 is not specifically limited, in this embodiment, a grab bucket is used as an example.

  As shown in FIG. 2, the quay crane 1 includes a plurality of drums that are individually driven by a motor (not shown) in a machine room 10. Specifically, the quay crane 1 includes a supporting drum D1, a supporting drum D2, an opening / closing drum D3, and an opening / closing drum D4 as the plurality of drums. The supporting drum D2 and the opening / closing drum D4 are disposed on the sea side, and the supporting drum D1 and the opening / closing drum D3 are disposed on the land side. That is, the support drum D2 and the open / close drum D4 according to the present embodiment are examples of the sea side drum disposed on the sea side, and the support drum D1 and the open / close drum D3 are the land disposed on the land side. It is an example of a side drum.

  The support wire W1 wound around the support drum D1 and the open / close wire W3 wound around the open / close drum D3 are land end side pulleys P1 disposed at the land side end (land end side) of the girder 4, respectively. And the suspension tool 8 is suspended via the trolley upper pulley P5 and the trolley upper pulley P7 provided on the trolley 7 via the land end side pulley P3. Further, the supporting wire W2 wound around the supporting drum D2 and the opening / closing wire W4 wound around the opening / closing drum D4 are respectively connected to the sea end (sea end side) of the boom 5 at the sea end. The hanging tool 8 is suspended through the side pulley P2 and the sea end side pulley P4, via the trolley upper pulley P6 and the trolley upper pulley P8 provided on the trolley 7.

  The quay crane 1 includes a control device 11 in the machine room 10. The controller 11 controls the rotation of the support drum D1, the support drum D2, the open / close drum D3, and the open / close drum D4 based on, for example, a driver's command, thereby moving the trolley 7 (see FIG. 3), the lifting / lowering operation of the hanging tool 8 (see FIG. 4 described later), and the opening / closing operation of the hanging tool 8 (refer to FIG. 5 described later). Such a control device 11 includes a support drum D1, a support drum D2, an open / close drum D3, a sequencer for controlling the open / close drum D4, and the like.

  Next, a general operation of the quay crane 1 will be described. As shown in FIG. 1, when unloading the transported material 21 from the bulk carrier 20, the trolley 7 is positioned on the bulk carrier 20, and the transported material 21 is gripped by the hanger 8. Then, the trolley 7 is positioned on the hopper 9, the hanging tool 8 is opened, and the transported material 21 is loaded onto the hopper 9 as a transported material receiving device.

When moving the trolley 7 from the sea side to the land side, as shown in FIG. 3, the supporting drum D1, the supporting drum D2, the opening and closing drum D3, and the opening and closing drum D4 are in the same direction (clockwise in the figure). , The land end side support wire W1 and the open / close wire W3 are wound up, and the sea end side support wire W2 and the open / close wire W4 are fed out. Conversely, when the trolley 7 is moved from the land end side to the sea end side, the support drum D1, the support drum D2, the opening / closing drum D3, and the opening / closing drum D4 are rotated in the same direction (counterclockwise in the figure). Then, the land-side support wire W1 and the open / close wire W3 are fed out, and the sea-end side support wire W2 and the open / close wire W4 are wound up.

  When lifting the lifting tool 8, as shown in FIG. 4, the land end side support drum D1 and the open / close drum D3 are rotated clockwise in the figure, and the sea end side support drum D2 and the open / close drum are opened and closed. The drum D4 is rotated in the opposite direction (counterclockwise in the figure) to wind up the wires W1 to W4. On the other hand, when lowering the hanger 8, the land end side support drum D1 and the open / close drum D3 are rotated counterclockwise in the figure, and the sea end side support drum D2 and the open / close drum D4 are rotated. Is rotated in the opposite direction (clockwise in the figure) to feed out the wires W1 to W4.

  When opening the hanging tool 8, as shown in FIG. 5, the opening / closing drum D3 is rotated counterclockwise in the drawing, and the opening / closing drum D4 is rotated in the opposite direction to the opening / closing wire W3 and the opening / closing. The wire W4 is fed out. On the contrary, when closing the hanging tool 8, the opening / closing drum D3 is rotated clockwise in the figure, the opening / closing drum D4 is rotated in the opposite direction, and the opening / closing wire W3 and the opening / closing wire W4 are moved. Roll up.

  Next, wire replacement work for replacing a wire already attached to the quay crane 1 with a new wire (that is, a replacement wire) will be described. First, the internal configuration of the machine room 10 will be described. FIG. 6A is a schematic view schematically showing a state in which the inside of the machine room 10 is viewed from the upper side. In the machine room 10, the above-described plurality of drums (the supporting drum D2 is illustrated in FIG. 6A) are arranged, and further, a wire exchange winch 15 and a fence 16 are arranged. . In addition to the devices illustrated in FIG. 6A, various devices are arranged in the actual machine room 10 in addition to the control device 11 described above. In FIG. Is not shown.

  At least the following operations are performed during wire exchange. Specifically, a wire exchange messenger wire Wm (hereinafter abbreviated as messenger wire Wm) for pulling up the wire to the machine room 10 is connected to the end of the new wire by welding or the like. The messenger wire Wm is wound around the drum (in this embodiment, as an example, the supporting drum D2) while the messenger wire Wm is pulled up to the machine chamber 10 by the wire replacement winch 15. At least the above operations are performed at the time of wire exchange.

  The fence 16 is disposed in a portion between the wire exchange winch 15 and the support drum D2 in the path of the messenger wire Wm in the machine room 10. FIG. 6B is a front view showing a state in which the fence 16 is viewed from the wire exchange winch 15 side. In FIG. 6B, the upper direction corresponds to the actual upper direction (the direction opposite to gravity). The fence 16 is provided with a passage hole 17 through which the messenger wire Wm passes. Therefore, at the time of wire replacement, the messenger wire Wm passes through the wire replacement winch 15 and then passes through the passage hole 17 and is wound around the support drum D2.

  As shown in FIG. 6 (a), the messenger wire Wm according to the present embodiment bends approximately 90 degrees (passes approximately 90 degrees upward in the figure) after passing through the passage hole 17, and further approximately 90 degrees. It is wound around the supporting drum D2 after being bent (approximately 90 degrees to the right in the figure). In the present embodiment, a plurality of guide members (not shown) such as a guide sheave for guiding the messenger wire Wm are arranged in the path from the wire exchange winch 15 of the messenger wire Wm to the support drum D2. ing. Although the specific arrangement | positioning location of this guide member is not specifically limited, In this embodiment, as an example, it arrange | positions in the location where the path | route of the messenger wire Wm bends about 90 degree | times. However, the path from when the messenger wire Wm passes through the passage hole 17 until it is wound around the support drum D2 is not limited to the path shown in FIG. Further, the number of guide members is not limited to a plurality, and may be one, for example. Alternatively, the guide member may not be used (that is, the messenger wire Wm is not guided by the guide member). In the present embodiment, in addition to the messenger wire Wm, a new wire (new support wire W2) connected to the end of the messenger wire Wm also passes through the passage hole 17.

  In the present embodiment, the size (diameter) of the passage hole 17 is set larger than the outer diameter of the messenger wire Wm and the new wire connected thereto, so that the messenger wire Wm and the new wire can pass through. The specific numerical value of the size of the passage hole 17 is not particularly limited. Further, as shown in FIG. 6B, the passage hole 17 according to the present embodiment is formed in the vicinity of the central portion of the fence 16 (specifically, a portion below the central portion by a predetermined distance) The formation position of the passage hole 17 in the fence 16 is not limited to this.

  According to the quay crane 1 described above, since the fence 16 has the passage hole 17 as described above, the wire 16 can be replaced without removing the fence 16 and removing it from the path of the messenger wire Wm at the time of wire replacement. The messenger wire Wm passing through the winch 15 can be passed through the passage hole 17 and wound around the supporting drum D2. This eliminates the need to remove the fence 16 and remove it from the path of the messenger wire Wm when exchanging the wires, so that the efficiency of the wire exchanging operation can be improved.

  In the above description, as an example of the work at the time of replacing the wire, the work of winding the messenger wire Wm around the support drum D2 has been described. However, the work at the time of replacing the wire to which the present invention is applied is not limited to this. The present invention can also be applied to the case where the messenger wire Wm is wound around the opening / closing drum D4, or the case where the messenger wire Wm is wound around the opening / closing drum D3 or the supporting drum D1.

(Embodiment 2)
Then, the quay crane 1a which concerns on Embodiment 2 of this invention is demonstrated. Fig.7 (a) is explanatory drawing for demonstrating the quay crane 1a which concerns on this embodiment. Specifically, FIG. 7A shows the spar 6 of the quay crane 1a, the machine room 10 and the like extracted during wire replacement. The quay crane 1a is similar to the first embodiment shown in FIG. 1 in that a wire guide 18a and a wire guide 18b (shown in FIGS. 7B and 7C described later) are further provided. It differs from the quay crane 1 which concerns. Since the other structure of the quay crane 1a is the same as that of the quay crane 1, description is abbreviate | omitted.

  The quay crane 1a according to the present embodiment includes two sets of wire guides 18a and wire guides 18b in the girder 4 portion of the beam 6. Specifically, the quay crane 1a has a pair of wire guides 18a and 18b (referred to as a first wire guide group) in the girder 4, and the girder 4 is more On the side portion, another set of wire guides 18a and 18b (referred to as a second wire guide group) is provided. However, the number of the wire guides 18a and the wire guides 18b is not limited to this, and the quay crane 1a may include only one set of the wire guides 18a and 18b, or may include three or more sets. . Moreover, the quay crane 1a can also be set as the structure provided with only any one among the wire guide 18a and the wire guide 18b.

FIG. 7B is a partial schematic view schematically showing a state in which the wire guides 18a and 18b (specifically, the first wire guide group) at the time of wire replacement are viewed from above, and FIG. It is the partial schematic diagram which shows typically the state which looked at wire guide 18a, 18b (1st wire guide group) at the time other than the time of wire replacement | exchange from the upper direction. In FIG. 7B and FIG. 7C, the lower side corresponds to the land side. Since the configuration of the second wire guide group is the same as that of the first wire guide group, detailed description of the second wire guide group by illustration is omitted.

  As shown in FIG. 7A, at the time of wire replacement, the end of the boom 5 on the sea side is displaced upward (that is, the boom is raised), and the trolley 7 of the quay crane 1a Located on the side edge (ie back reach). As shown in FIGS. 7A and 7B, the wire guides 18a and 18b guide the portion of the wire between the trolley 7 and the end of the spar 6 on the sea side during wire replacement. Yes.

  Specifically, as shown in FIG. 7B, the wire guide 18a is installed on the side wall portion on one side (left side in the figure) of the girder 4, and is used for opening and closing before the wire replacement at the time of wire replacement. The wire W4 (that is, the old opening / closing wire W4) is guided from below. Moreover, the wire guide 18b is installed in the side wall part of the other side (right side in the figure) of the girder 4, and guides the supporting wire W2 before the wire replacement from the lower side during the wire replacement.

  The wire guide 18a also guides the opening / closing wire W4 after the wire replacement (that is, the new opening / closing wire W4). Similarly, the wire guide 18b also guides the support wire W2 after the wire replacement.

  The wire guides 18a and 18b are formed in a roller shape so that a portion for guiding the wire rotates, and has a so-called guide roller structure. Thereby, when a wire moves to the longitudinal direction, it can suppress effectively that the surface of a wire and the surface of wire guide 18a, 18b are rubbed, and a wire wears. However, the configuration of the wire guides 18a and 18b is not limited to this. For example, the wire guides 18a and 18b may have a configuration in which a portion for guiding the wire does not rotate (that is, a configuration without a guide roller structure).

  Moreover, as shown in FIG.7 (c), wire guide 18a, 18b is comprised so that it can deform | transform into the state which does not interfere with the trolley 7 traversing on the top of the girder 6 except at the time of wire replacement | exchange. As an example of this, the wire guides 18 a and 18 b according to the present embodiment have a structure that can rotate 90 degrees in the horizontal direction around the rotation shaft 19. As a result, the wire guides 18a and 18b guide the wire at the time of wire replacement as shown in FIG. 7B, and rotate 90 degrees at times other than at the time of wire replacement as shown in FIG. 7C. Thus, by deforming along the side wall of the girder 4, it can be brought into a state where it does not interfere with the traversing trolley 7.

  FIG. 8A to FIG. 8C are schematic views for explaining in detail the wire replacement work of the opening / closing wire W4 according to the present embodiment. In addition, in FIG. 8 (a)-FIG.8 (c), illustration of the girder 6, the hanging tool 8, the leg 3, etc. is abbreviate | omitted. First, as shown in FIG. 8A, at the time of wire replacement of the opening / closing wire W4, the trolley 7 is displaced to the back reach and moored, and the sea side end of the boom 5 is displaced upward (boom up ) Moreover, the hanging tool 8 is lowered to the ground. Note that the position of the trolley 7 is not limited to the back reach when the wires are exchanged. As another example, the trolley 7 may be moored at a position other than the back reach when the wire is exchanged.

  At this time, the portion near the end of the boom 5 on the land side of the boom 5 is guided by the pulley P10, and the portion between the end of the boom 5 on the sea side and the machine room 10 is guided by the pulley P11. Guided. Further, the wire guide 18a described above also guides the old open / close wire W4.

  Next, as shown in FIG. 8B, messenger wires Wm are connected to both ends of the old opening / closing wire W4, and these wires are drawn to the ground side by the wire drawing winch 30 arranged on the ground. Thus, the old opening / closing wire W4 is recovered by the wire drawing winch 30. At this time, a portion of the wires between the trolley 7 and the wire drawing winch 30 is guided by the pulley P12.

  Next, as shown in FIG. 8 (c), a messenger wire Wm is connected to one end of a new opening / closing wire W4, and the messenger wire Wm and a wire exchange winch 15 of the machine room 10 are used. The new open / close wire W4 connected is wound up in the direction of the machine room 10. As a result, a new opening / closing wire W4 is wound around the drum D4. Next, the wire guide 18a is stored as shown in FIG. As described above, the opening / closing wire W4 is exchanged. The support wire W2 is also exchanged by the same method.

  The operational effects of the quay crane 1a described above will be described as follows in comparison with the quay crane 200 according to the comparative example shown in FIG. The quay crane 200 according to the comparative example is different from the quay crane 1a according to the present embodiment in that the wire guides 18a and 18b are not provided. In the case of the quay crane 200 according to this comparative example, when the hanging tool 8 is removed from the opening / closing wire W4 when the opening / closing wire W4 is exchanged, the opening / closing wire W4 is bent due to its own weight, or externally such as wind. Due to the factor, the portion of the opening / closing wire W4 between the trolley 7 and the end of the girder 6 on the sea side droops greatly, and this large drooping causes the end of the opening / closing wire W4 (on the side opposite to the machine room 10 side). End) may rise. Further, in the case of the quay crane 200, a similar phenomenon may occur even when the support wire W2 is replaced.

  On the other hand, according to the quay crane 1a which concerns on this embodiment, in addition to the effect of the quay crane 1 which concerns on Embodiment 1 mentioned above, there can exist the following effect. Specifically, according to the quay crane 1a, the wire guides 18a and 18b greatly hang down the portion between the trolley 7 and the end of the girder 6 on the sea side at the time of wire replacement. Can be suppressed. This makes it possible to reduce or shorten the work of correcting the large sag of the wire (W4, W2) and the work of correcting the rise of the end of the wire (W4, W2) due to this large sag. It can be made.

  Further, according to the quay crane 1a, the wire guides 18a and 18b can be deformed so as not to interfere with the trolley 7 traversing the top of the girder 6 except when the wires are exchanged. When (W4, W2) is guided and the wire is not exchanged, the wire guides 18a, 18b are deformed so as not to interfere with the trolley 7, thereby suppressing the interference between the wire guides 18a, 18b and the trolley 7. be able to.

  In addition, in Embodiment 1 and Embodiment 2 mentioned above, although the rope trolley type unloader is used as an example of the quay crane 1 or the quay crane 1a, the kind of the quay crane to which the present invention is applied is not limited to this. For example, the present invention can be applied to a quay crane having a hanging tool 8 such as a spreader. Moreover, although the rope trolley type unloader described above has a configuration having four independent drums, the present invention is not limited to this, and can be applied to, for example, a configuration having two independent drums.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. Is possible.

DESCRIPTION OF SYMBOLS 1 Quay crane 2 Traveling device 3 Leg 4 Girder 5 Boom 6 Girder 7 Trolley 8 Lifting tool 9 Hopper 10 Machine room 11 Controller 15 Wire exchange winch 16 Fence 17 Passing hole 18a, 18b Wire guide 19 Rotating shaft 20 Bulk carrier 21 Transport Object 30 Winch for wire drawing D1 to D4 Drum W1 to W4 Wire Wm Wire replacement messenger wires P1 to P8, P10 to P12 pulley

Claims (3)

In the quay crane having a fence in the portion between the wire exchange winch and the drum, among the paths of the wire exchange messenger wire in the machine room where the wire exchange winch is arranged,
A quay crane, wherein the fence is provided with a passage hole through which the messenger wire for wire replacement passes. Digits and
A trolley traversing the land side and the sea side over the girder by a wire;
The quay crane according to claim 1, further comprising a wire guide for guiding a portion of the wire between the trolley and an end portion of the girder on the sea side when the wire is exchanged.   3. The quay crane according to claim 2, wherein the wire guide is configured to be deformable so as not to interfere with the trolley traversing the girder when the wire is not exchanged.

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