JP2015020899A - Quay crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quay crane (low profile crane) having a slide-type boom movably supported in a horizontal direction on a leg structure in which the weight of the moving slide-type boom is reduced, and stability is improved.SOLUTION: A quay crane 1 has a fixed boom 3P fixed to a leg structure and a mobile boom 3S movably supported in a horizontal direction along the fixed boom 3P instead of a slide-type boom. The fixed boom 3P has stationary side travel rails 5P on which a trolley 4 travels, the mobile boom 3S has mobile side travel rails 5S on which the trolley 4 travels, the stationary side travel rails 5P and the mobile side travel rails 5S are arranged so as to have an overlapped section where the rails are overlapped at least partially, and the trolley 4 has wheels 6P,6S respectively corresponding to the stationary side travel rails 5P and the mobile side travel rails 5S.

Description

  The present invention relates to a quay crane used for container handling at a port or an inland container terminal.

  At container terminals such as harbors and inland areas, containers between ships, railways and trailers are handled by quay cranes and portal cranes. If this container terminal is adjacent to the airport, quay cranes may be subject to height restrictions. Therefore, in such a container terminal, a quay crane (hereinafter referred to as a low profile crane or a crane) having a leg structure and a sliding boom (hereinafter referred to as a shuttle boom) is employed (see, for example, Patent Document 1). .

  FIG. 9 shows an outline at the time of cargo handling work of the low profile crane 1X. The crane 1X includes a leg structure 2, a sliding boom (hereinafter referred to as a shuttle boom) 3X supported by the leg structure 2 so as to be movable in the horizontal direction, and a trolley 4X traversing along the shuttle boom 3X. Have. The leg structure 2 includes a sea-side leg 21 and a land-side leg 22 and a traveling device 20 installed at the lower end thereof. Moreover, the shuttle boom 3X has the machine room 7X installed in the inside. Reference numeral 23 denotes a container ship, and 24 denotes a container to be handled. In addition, y indicates the transverse direction y of the crane 1X, and z indicates the vertical direction.

  In FIG. 10, the outline at the time of a rest of the low profile crane 1X is shown. The crane 1X has moved the shuttle boom 3X to the land side (left side in FIG. 10). This is to avoid interference between the bridge of the container ship 23 and the shuttle boom 3X when the container ship 23 is berthing or leaving the berth. With this configuration, the low profile crane 1X can be employed even in a container terminal in a district where the total height is restricted because the maximum total height does not vary.

  However, the low profile crane 1X has a problem that it is difficult to improve stability. This is because the center of gravity of the crane 1X greatly moves due to the movement of the shuttle boom 3X, which is a super heavy object. For example, in the case of the crane 1X having a total weight of about 1500 to 1600 t, the weight of the shuttle boom 3X is about 300 to 400 t, and the weight of the machine room 7X is about 100 t. In other words, in the crane 1X, the weight of the moving structure is about 30% of the entire crane and is 35 to 50 m high from the ground surface. It changes greatly and the crane 1X becomes unstable.

JP 2011-251835 A

  The present invention has been made in view of the above problems, and an object thereof is to reduce the weight of a moving sliding boom in a quay crane having a sliding boom supported so as to be movable in a horizontal direction on a leg structure. The objective is to provide a quay crane with reduced stability.

  In order to achieve the above object, a quay crane according to the present invention includes a leg structure, a slide boom supported by the leg structure so as to be movable in a horizontal direction, and a trolley traversing along the slide boom. A quay crane having a fixed boom fixed to the leg structure instead of the sliding boom, and a movable boom supported movably in the horizontal direction along the fixed boom. The fixed boom has a fixed traveling rail on which the trolley travels, the movable boom has a movable traveling rail on which the trolley travels, and the fixed traveling rail and the movement The side traveling rail is arranged so as to have an overlapping section at least partially overlapping, and the trolley has wheels corresponding to the fixed side traveling rail and the moving side traveling rail. To.

  With this configuration, the stability of the quay crane (low profile crane) can be improved. This is because the conventional sliding boom is divided and only the moving boom moves relative to the low profile crane. Further, since the trolley has wheels corresponding to both the fixed side traveling rail and the moving side traveling rail respectively disposed on the fixed boom and the moving boom, the trolley moves from the fixed boom side to the moving boom side or vice versa. Can be moved smoothly. That is, when the trolley moves between the fixed boom and the moving boom, no impact is generated on the trolley. For this reason, the problem that the container hung on the trolley swings does not occur.

  In the above quay crane, the trolley includes a fixed wheel corresponding to the fixed traveling rail and a moving wheel corresponding to the moving traveling rail. With this configuration, the trolley has wheels that respectively correspond to the fixed-side traveling rail and the moving-side traveling rail respectively disposed on the fixed boom and the moving boom, and thus the trolley can be smoothly moved as described above. Movement can be realized.

  In the above quay crane, the quay crane includes a fixed side section in which only the fixed side wheel of the trolley moves in contact with the fixed side traveling rail, the fixed side wheel and the moving side wheel of the trolley. An overlapping section that moves in contact with each of the fixed-side traveling rail and the moving-side traveling rail, and a moving-side section in which the moving-side wheel of the trolley moves in contact with the moving-side traveling rail. It is characterized by that. With this configuration, the same effects as described above can be obtained.

  In the aforementioned quay crane, the wheel of the trolley has a partition plate protruding in a circumferential direction from a running surface of the wheel, and the wheel is bounded by the partition plate while the fixed side It is configured to contact the traveling rail and to contact the moving side traveling rail on the other side. With this configuration, the same effects as described above can be obtained.

  In the above quay crane, the fixed boom has a substantially U-shaped cross section with an open end at the lower side, and the fixed-side traveling rail is installed in a peripheral portion of the open end. And With this configuration, the same effects as described above can be obtained.

  According to the quay crane according to the present invention, in the quay crane having a slide boom supported by the leg structure so as to be movable in the horizontal direction, the weight of the moving slide boom is reduced, and the quay crane improved in stability. Can be provided.

It is the figure which showed the outline at the time of the cargo handling work of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline at the time of a stop of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline of the cross section of the fixed side area A of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline of the trolley of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline of the cross section of the duplication section B of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline of the cross section of the movement side area C of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline of the cross section of the wharf crane of different embodiment which concerns on this invention. It is the figure which showed the outline of the traveling rail of the quay crane of embodiment which concerns on this invention. It is the figure which showed the outline at the time of the cargo handling work of the conventional quay crane. It is the figure which showed the outline at the time of the stop of the conventional quay crane.

  Hereinafter, a quay crane (hereinafter, a low profile crane or a crane) according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the outline at the time of the cargo handling work of the low profile crane 1 of embodiment which concerns on this invention is shown. Instead of the conventional sliding boom, the crane 1 includes a fixed boom 3P fixed to the leg structure 2, and a movable boom 3S installed so as to be movable in the horizontal direction (transverse direction y) along the fixed boom 3P. The trolley 4 traverses along the fixed boom 3P and the moving boom 3S. Moreover, the fixed boom 3P has the machine room 7 installed in the inside.

  Here, A indicates a fixed side section A in which the traveling portion of the trolley 4 is only the fixed boom 3P, B indicates an overlapping section B in which the traveling portion of the trolley 4 is the fixed boom 3P and the moving boom 3S, and C is the trolley. 4 shows a moving side section C in which the traveling portion 4 is only the moving boom 3S. Reference numeral 23 denotes a container ship, and 24 denotes a container to be handled. Furthermore, y indicates the transverse direction y of the crane 1, and z indicates the vertical direction.

  Next, the operation of the crane 1 will be described. After the container ship 23 has berthed, the crane 1 slides the moving boom 3S to the sea side (right side in FIG. 1) (see arrow), and completes preparations for cargo handling work. Thereafter, the trolley 4 handles the container 24 while traversing along the fixed boom 3P and the moving boom 3S.

  FIG. 2 shows an outline when the crane 1 is at rest. The crane 1 slides the moving boom 3S to the land side (left side in FIG. 2) when the container ship 23 is berthing or leaving the shore (see arrow). Thereby, interference of the bridge of the container ship 23 and the moving boom 3S can be avoided. At this time, the moving boom 3S overlaps with the fixed boom 3P, and the overlapping section B increases.

  With the above configuration, the stability of the crane 1 can be improved. This is because the moving structure is only the moving boom 3S having a small weight. Here, the weight of the moving boom 3S can be reduced to, for example, about 150 to 200 t, about half that of the conventional shuttle boom 3X of 300 to 400 t. Moreover, the weight of the whole crane can be reduced by improving the stability of the crane 1. This is because sufficient stability can be maintained for the highly stable crane 1 even if the leg structure 2 or the like is reduced in weight.

  In addition, although the machine room 7 may be installed in the moving boom 3S, it is desirable to install it in the fixed boom 3P. This is because the weight of the moving structure can be suppressed and the stability of the crane 1 can be improved.

  Next, the trolley 4 that moves along the fixed boom 3P and the moving boom 3S will be described. In FIG. 3, the outline of the cross section of the fixed side area A in which only the fixed boom 3P exists is shown. The fixed boom 3P has a substantially U-shaped cross section with the lower end as an open end. The fixed boom 3P is a peripheral portion of the open end, and two fixed-side traveling rails 5P respectively installed on the outer side surface of the substantially U-shaped cross section, and two support members respectively installed on the inner side surface 10. Moreover, the fixed boom 3P has the reinforcement member 13 for strengthening a structure.

  The trolley 4 has a fixed side wheel 6P corresponding to the fixed side traveling rail 5P and a moving side wheel 6S described later. The trolley 4 is configured to move in the transverse direction y (the front and back direction in FIG. 3) while being suspended from the fixed boom 3P via the fixed-side wheel 6P. Here, x indicates the traveling direction x of the crane 1, and z indicates the vertical direction.

  FIG. 4 shows an outline of the trolley 4. The trolley has four fixed wheels 6P and four moving wheels 6S. Here, the fixed-side wheel 6P and the moving-side wheel 6S that face each other are arranged so that their center axes coincide with each other. With this configuration, the distance between the wheels in the transverse direction y can be widely set, and the straight running stability of the trolley 4 can be improved. In addition, the trolley 4 can be easily manufactured.

  In addition, the trolley 4 of the quay crane 1 of this invention is not restricted to this structure. The number and installation positions of the fixed wheel 6P and the moving wheel 6S can be arbitrarily changed. Moreover, this invention can also arrange | position so that the center axis | shaft of the fixed side wheel 6P and the movement side wheel 6S which face each may not correspond.

  In FIG. 5, the outline of the cross section of the duplication section B in which the fixed boom 3P and the moving boom 3S exist is shown. As described above, the fixed boom 3P has the fixed traveling rail 5P. Moreover, the fixed boom 3P has the support member 10 which supports the movement boom 3S so that sliding is possible. The support member 10 is provided on the inner surface of the periphery of the open end of the substantially U-shaped cross section. Further, it is desirable that the support member 10 is formed over the entire length of the range that can become the overlapping section B in the fixed boom 3P.

  On the other hand, the moving boom 3S is disposed inside the fixed boom 3P and has a substantially U-shaped cross section with the lower end as an open end. Further, the moving boom 3S has two moving-side traveling rails 5S that are provided at the periphery of the open end and are installed on the substantially U-shaped inner surface. The moving-side traveling rail 5S is disposed so as to be parallel to and inside the fixed-side traveling rail 5P. Further, the moving boom 3S has a sliding member 16 such as a slide pad configured to be slidable on the support member 10 at the lower end thereof. The sliding member 16 is guided by a recess formed on the upper surface of the support member 10 and extending in the transverse direction y (the frontward and rearward direction in FIG. 5), and the sliding of the movable boom 3S with respect to the fixed boom 3P. Is realized. The sliding member 16 is preferably installed over the entire length of the range that can be the overlapping section B in the moving boom 3S, but may be installed at intervals in a plurality of places. Further, the moving boom 3S has a reinforcing member 14 for strengthening the structure.

  In addition, the trolley 4 has a fixed wheel 6P that travels on the fixed travel rail 5P and a moving wheel 6S that travels on the moving travel rail 5S. The trolley 4 is configured to move in the transverse direction y (the front and back direction in FIG. 5) while being suspended from the fixed boom 3P and the moving boom 3S via the fixed wheel 6P and the moving wheel 6S. Has been.

In FIG. 6, the outline of the cross section of the movement side area C in which only the movement boom 3S exists is shown. The moving boom 3S has a substantially U-shaped cross section with the lower end as an open end. Further, the moving boom 3S has two moving-side traveling rails 5S that are provided at the periphery of the open end and are installed on the substantially U-shaped inner surface. Further, the moving boom 3S has a sliding member 16 installed below the open end.

  As described above, the trolley 4 is supported by the fixed-side traveling rail 5P in the fixed-side section A, the state supported by the fixed-side traveling rail 5P and the moving-side traveling rail 5S in the overlapping section B, and the moving side. In the section C, it becomes one of the states supported by the moving-side traveling rail 5S.

  With the above-described configuration, the crane 1 can achieve smooth traveling of the trolley 4 while being the crane 1 with improved stability. This is because the fixed traveling rail 5P and the movable traveling rail 5S are independently installed on different axes and arranged so as to be parallel to each other, so that the wheels 6 of the trolley 4 are always fixed. Alternatively, it is supported by at least one of the moving side travel rails 5S.

  For example, if the fixed traveling rail 5P and the moving traveling rail 5S are arranged so that the central axes thereof coincide with each other, it is necessary to transfer from the stationary traveling rail 5P to the moving traveling rail 5S. When the trolley 4 makes a connection between the traveling rails 5P and 5S, the load generated on the wheels changes abruptly and an impact occurs on the trolley 4. This impact may affect the fatigue of the driver in the driver's cabin under the trolley, or the container in which the trolley 4 is suspended may cause a problem in handling.

  In FIG. 5, a wheel may be installed instead of the sliding member 16 that makes surface contact with the support member 10. At this time, it is desirable to install a rail-like member or the like for guiding the wheel on the support member 10 side. With this configuration, smooth sliding of the moving boom 3S with respect to the fixed boom 3P can be realized.

  Moreover, it is desirable to install the sliding member 16 also above the moving boom 3S (top surface). This is because when the moving boom 3S moves to the sea side (see FIG. 1), the sliding member 16 above the moving boom 3S comes into contact with the inner top surface of the fixed boom 3P or the lower surface of the reinforcing member 13, and the moving boom 3S. This is because 3S can be supported horizontally. At this time, similarly to the above, even if a wheel or the like is employed instead of the sliding member 16, the same effect can be obtained.

  Furthermore, the same effect can be obtained even if the wheel is installed on the fixed boom 3P side and the rail upper member is installed on the moving boom 3S side.

  In addition, the sliding of the moving boom 3S is realized by a driving roller or the like installed on the fixed boom 3P or the reinforcing member 13, for example. At this time, the moving boom 3S is in contact with the drive roller, and can slide with respect to the fixed boom 3P by the rotation of the drive roller. In addition, the slide of the moving boom 3S includes a drum installed on the fixed boom 3P side (the fixed boom 3, the sea side leg 21, or the land side leg 22, etc.), and the sea side and the land side of the moving boom 3S that are fed out from the drum. You may implement | achieve with the wire respectively connected with the edge part. At this time, the moving boom 3S winds up the wire drawn out to the sea side, for example, by the rotation of the drum, further draws out the wire drawn out to the land side, and slides to the land side with respect to the fixed boom 3P. Can do.

  In FIG. 7, the outline of the cross section of the low profile crane of different embodiment which concerns on this invention is shown. The cross section of FIG. 7 is that of the overlapping section B where the fixed boom 3P and the moving boom 3S exist. As described above, the fixed boom 3P has the fixed traveling rail 5P. The fixed boom 3P has a support member 10A that is installed on the inner surface of the substantially U-shaped cross section and supports the movable boom 3S so as to be slidable.

  On the other hand, the moving boom 3S is installed inside the fixed boom 3P and has a substantially U-shaped cross section with the lower end as an open end. Further, the moving boom 3S has a moving-side traveling rail 5S that is provided on the outer surface of the outer periphery of the open end and is substantially U-shaped. The moving-side traveling rail 5S is installed so as to be parallel to the fixed-side traveling rail 5P and outside thereof. Furthermore, the moving boom 3S has a protruding member 11 that is installed on the substantially U-shaped outer surface and that corresponds to the support member 10A of the fixed boom 3P. The moving boom 3S is slidably supported by the supporting member 10A via the protruding member 11.

  In addition, the trolley 4A has wide wheels 6A corresponding to the fixed-side traveling rail 5P and the moving-side traveling rail 5S (see the left side of FIG. 7). The wheel 6A is configured to support the trolley 4A by simultaneously contacting the fixed-side traveling rail 5P and the moving-side traveling rail 5S arranged in parallel and at the same height. Further, the wheel 6A is in contact with only the fixed side traveling rail 5P in the fixed side section A, and is in contact with only the moving side traveling rail 5S in the moving side section C.

  With the above configuration, the fixed boom 3P can support the movable boom 3S so as to be slidable in the transverse direction y as described above. Moreover, since the space Q inside the inner side surface of the moving boom 3S can be secured, it becomes easy to install a device such as a sheave on the upper surface of the trolley 4A.

  In addition, you may comprise so that the wheel 6A of the trolley 4A may have the partition plate 8 protruding in the circumferential direction from the running surface of the wheel (refer FIG. 7 right side). The wheel 6A is in contact with the fixed side running rail 5P on one side (the left side in FIG. 7) on the partition plate 8 and on the moving side on the other side (the right side in FIG. 7). It is comprised so that the rail 5S may be contacted. Here, the running surface of the wheel means a surface where the wheel and the rail come into contact.

  With this configuration, even when the wheel 6A is in contact with, for example, only the fixed-side traveling rail 5P, the straight traveling performance of the trolley 4A can be improved because the partition plate 8 guides the traveling rail 5P.

  Further, the supporting member 10A and the protruding member 11 are provided with a sliding member 16 or a wheel on one side and a recess or a rail-like member for guiding them on the other side, like the supporting member 10 shown in FIG. May be. Furthermore, it is desirable that the support member 10A and the protruding member 11 be installed over the entire length of the range that can be the overlapping section B, like the support member 10 shown in FIG. However, either one of the supporting member 10A or the protruding member 11 may be installed at intervals in a plurality of places.

  In addition, as described above, it is desirable to install the sliding member 16 also above the moving boom 3S (top surface). This is because when the moving boom 3S moves to the sea side (see FIG. 1), the sliding member 16 above the moving boom 3S comes into contact with the inner top surface of the fixed boom 3P or the lower surface of the reinforcing member, and the moving boom 3S. This is because it can be supported horizontally. At this time, similar to the above, even if a wheel or the like is used instead of the sliding member 16, the same effect can be obtained.

In FIG. 8, the enlarged view of the edge part of the fixed side traveling rail 5P and the movement side traveling rail 5S is shown. As shown in FIG. 8, it is desirable that the end portions of the fixed-side traveling rail 5P and the moving-side traveling rail 5S have an inclined portion 12 that is inclined downward toward the end portions. Particularly preferably, the upper surface of the rail in the inclined portion 12 is configured to form a curved surface that gently falls downward. With this configuration, when the fixed-side wheel 5P and the moving-side wheel 5S ride on the rails 5P and 5S or get off the rails 5P and 5S (the trolley moves from the fixed-side section A or the moving-side section C to the overlapping section B). In the case or vice versa), the impact generated on the trolley can be further suppressed. This is because the load generated on the wheels 5P and 5S is increased or decreased stepwise by the inclined portion 12, and a sudden change in the load does not occur.

  The fixed traveling rail 5P and the moving traveling rail 5S may not be installed in parallel, but may be installed so that the entire fixed traveling rail 5P is inclined downward from the fixed section A to the overlapping section B. . Moreover, you may install so that the movement side travel rail 5S whole may incline below toward the overlap area B from the movement side area C. FIG. Furthermore, you may install both the fixed side traveling rail 5P and the movement side traveling rail 5S inclining as mentioned above. With this configuration, it is possible to suppress an impact generated in the trolley.

DESCRIPTION OF SYMBOLS 1 Quay crane, Low profile crane 2 Leg structure 3P Fixed boom 3S Moving boom 4 Trolley 5P Fixed side traveling rail 5S Moving side traveling rail 6P Fixed side wheel 6S Moving side wheel A Fixed side section B Overlapping section C Moving side section

Claims (5)

In a quay crane having a leg structure, a slide boom supported by the leg structure so as to be movable in a horizontal direction, and a trolley traversing along the slide boom,
The quay crane has, instead of the sliding boom, a fixed boom fixed to the leg structure, and a movable boom supported so as to be horizontally movable along the fixed boom.
The fixed boom has a fixed travel rail on which the trolley travels, the mobile boom has a travel travel rail on which the trolley travels, and the fixed travel rail and the travel travel rail are at least partially It is arranged to have overlapping sections that overlap,
The quay crane, wherein the trolley has wheels corresponding to the fixed traveling rail and the moving traveling rail.   2. The quay crane according to claim 1, wherein the trolley includes a fixed-side wheel corresponding to the fixed-side traveling rail and a moving-side wheel corresponding to the moving-side traveling rail. The quay crane is
Only the fixed-side wheel of the trolley moves in contact with the fixed-side traveling rail; and
The overlapping section in which the fixed side wheel and the moving side wheel of the trolley move in contact with the fixed side traveling rail and the moving side traveling rail, respectively.
The quay crane according to claim 2, wherein the moving side wheel of the trolley has a moving side section that moves in contact with the moving side traveling rail. The wheel of the trolley has a partition plate protruding in the circumferential direction from the running surface of the wheel,
2. The quay crane according to claim 1, wherein the wheel is configured to contact the fixed traveling rail on the one side with the partition plate as a boundary, and to contact the moving traveling rail on the other side. . The fixed boom has a substantially U-shaped cross section with an open end at the bottom;
The quay crane according to any one of claims 1 to 4, wherein the fixed-side traveling rail is installed in a peripheral portion of the open end.

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