JP2015067455A - Cable crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable crane, which can fluctuate stably a main tower by a simple and inexpensive construction.SOLUTION: A lower end portion 3a of a main tower 3 a main rope is installed is connected to a base portion 9 through a first direction rotation portion 13 and a second direction rotation portion 15. The main tower 3 and the upper end 7a of a side stay 7 are connected using a spherical bearing to support the main tower 3 by the side stay 7 in a direction nearly perpendicular to the arrangement direction of the main rope. Moreover, the lower end portion 7b of the side stay 7 and a sliding mechanism 21 placed on the base portion 11 of the side stay 7 are connected using a spherical bearing. Then, the slide base of the sliding mechanism 21 is forced to travel along a sliding guide 23, and the lower end 7b of the side stay 7 is forced to move in a direction nearly perpendicular to the arrangement direction of the main rope, fluctuating the main tower 3 in a direction nearly perpendicular to the arrangement direction of the main rope.

Description

  The present invention relates to a cable crane.

  Conventionally, cable cranes have been used to construct dam bodies. In cable cranes, materials are transported and concrete is laid using a trolley that moves along a main rope installed between main towers, but in a fixed cable crane where the position of the main tower is fixed. The area that can be transported was limited to the vicinity of the main rope. Then, the cable crane which can expand the conveyance area | region using a trolley by moving a main tower has been proposed.

  As a cable crane capable of moving the main tower, for example, there are ones in which winches are provided on both sides of the main tower whose lower ends are joined to a support base by pins, and the winches on both sides are connected to the upper ends of the main tower by wires. It was. In this cable crane, by changing the length of the wire, the main tower is rotated around the pin as a fulcrum, and the dam dam body is inclined in the upstream and downstream direction (see, for example, Patent Document 1).

  In addition, there is also a type in which an extendable mast is disposed on one side of a main tower whose lower end is joined to a support base with a pin, and the upper end of the mast is joined to the main tower and the lower end is joined to the support base with a pin. It was. In this cable crane, the main tower is inclined by rotating the main tower and the mast while expanding and contracting the mast (see, for example, Patent Document 1).

  In addition, a screw feeder is installed along the main tower whose lower end is connected to the foundation via a rotating shaft, and the upper end of the side stay is connected to the feed nut of the screw feeder via the rotating shaft. Some have connected the lower end part of the side stay to the foundation via the shaft. In this cable crane, the main tower is swung by rotating the main tower and the side stay while screwing and moving the feed nut (for example, see Patent Document 2).

JP 2000-54636 A Japanese Patent Laid-Open No. 58-220088

  However, in a cable crane that tilts the main tower using a wire, it is necessary to install wires on both sides of the main tower, so that a large space is required for installation. Moreover, it is difficult to control the feeding and winding of the wire for operating the main tower while holding it. In addition, the position of the main tower may become unstable due to the expansion and contraction of the wire.

  Cable cranes using telescopic masts and screw feeders can reduce the installation space and stabilize the position of the main tower compared to cable cranes that use wires to tilt the main tower be able to. However, since it is necessary to install a large mast and a screw feeder at an upper position away from the foundation, there are problems such as being unsuitable for a large cable crane and costly.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cable crane that can stably swing a main tower with a simple and inexpensive configuration. .

  In order to achieve the above-described object, the present invention provides a main tower on which a main rope is constructed, a side stay that supports the main tower in a direction substantially perpendicular to the direction in which the main rope is disposed, and a foundation of the side stay. And a slide mechanism for moving a lower end portion of the side stay in a direction substantially perpendicular to a direction in which the main rope is disposed, and a lower end portion of the main tower and a foundation of the main tower, The side stay and the slide mechanism are joined, and the lower end portion of the side stay is moved using the slide mechanism, whereby the main tower is moved in a direction substantially perpendicular to the arrangement direction of the main rope. It is a cable crane characterized by being swung.

  In the present invention, the main tower is moved in the direction of the main rope by moving the lower end portion of the side stay in a direction substantially perpendicular to the direction of the main rope using a slide mechanism installed on the foundation of the side stay. Swing in a substantially vertical direction. Therefore, compared with a crane in which a telescopic mechanism or the like is installed on the upper side away from the foundation, the work for swinging the main tower is simple. Further, compared with a crane that swings the main tower using a wire, the space for installation can be reduced, and the position of the main tower can be easily stabilized. In the present invention, a large-scale device such as a wire or an expansion / contraction mechanism is not necessary, and the main tower can be stably swung with only a simple and inexpensive configuration.

The lower end portion of the main tower and the foundation of the main tower are, for example, a first rotating portion that rotates about an axis substantially parallel to the main rope, and a first rotation portion that rotates about an axis orthogonal to the main rope. The two rotating parts are connected to each other.
In this case, it is desirable that the rotation at the first rotating part and the rotation at the second rotating part are fixed after the main tower is swung and arranged at a predetermined position.

The main tower is supported by the tension of the back anchor. However, when the main tower is moved, the distance between the base portion of the anchor and the main tower may be extended or shortened to change the tension of the back anchor. By allowing the lower end of the main tower to rotate in two directions, the main tower can be rocked stably even if the tension of the back anchor changes.
Further, by making it possible to fix the rotation at the rotating part, the position of the main tower can be reliably fixed when the cable crane is used.

The upper end of the side stay and the main tower are preferably connected using a spherical bearing.
By connecting the upper end of the side stay and the main tower using a spherical bearing, the main tower can be stably swung even if the tension of the back anchor changes due to the movement of the main tower 3.

  The slide mechanism includes, for example, a slide guide, a slide base that is connected to a lower end portion of the side stay and travels along the slide guide, and a fixing jig that fixes the slide base and the slide guide. The slide base is moved to a predetermined position along the slide guide in a state where the fixing by the fixing jig is released, and then the slide base is fixed to the slide guide using the fixing jig. Shall.

  With the above-described configuration of the slide mechanism, the lower end portion of the side stay can be easily moved as necessary. Further, when the crane is used, the lower end portion of the side stay can be fixed to the slide mechanism to stabilize the position of the main tower.

The lower end of the side stay and the slide base are preferably connected using a spherical bearing.
By connecting the lower end of the side stay and the slide base using a spherical bearing, the main tower can be stably swung even if the tension of the back anchor changes due to the movement of the main tower.

  According to the present invention, it is possible to provide a cable crane capable of stably swinging the main tower with a simple and inexpensive configuration.

Elevated view of cable crane 1 viewed from a direction parallel to the main rope Elevated view of cable crane 1 viewed from a direction perpendicular to the main rope A perspective view of the vicinity of the joint between the base portion 9 and the lower end portion 3a of the main tower 3 A perspective view of the vicinity of the joint between the upper end 7a of the side stay 7 and the main tower 3 A perspective view of the vicinity of the joint between the slide mechanism 21 and the lower end 7b of the side stay 7 Elevated view of slide mechanism 21 The figure which shows the example of installation of the cable crane 1

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an elevational view of the cable crane 1 viewed from a direction parallel to the main rope. FIG. 2 is an elevational view of the cable crane 1 as viewed from a direction orthogonal to the main rope. FIG. 2 is a view of the cable crane 1 as seen from the direction indicated by the arrow C shown in FIG.

  As shown in FIGS. 1 and 2, the cable crane 1 includes a main tower 3, a slide mechanism 21, a side stay 7, a base portion 9, a base portion 11, a back anchor 41, an anchor 43, and the like.

  The main tower 3 is joined to the base portion 9 whose lower end portion 3a is the basis. The main tower 3 has a main rope attachment part 5 for attaching a main rope 39 to the upper part. The slide mechanism 21 is installed on the base portion 11 that is the basis of the side stay 7. The side stay 7 has an upper end portion 7 a connected to a side stay connecting portion 17 provided at an upper portion of the main tower 3, and a lower end portion 7 b connected to the slide mechanism 21. The side stay 7 supports the main tower 3 in a direction substantially perpendicular to the arrangement direction of the main rope 39. The back anchor 41 has one end connected to the main tower 3 and the other end connected to an anchor 43 installed in the natural ground 45. The back anchor 41 supports the main tower 3 in the arrangement direction of the main rope 39.

  FIG. 3 is a perspective view of the vicinity of the joint between the base portion 9 and the lower end portion 3 a of the main tower 3. As shown in FIG. 3, the base portion 9 and the lower end portion 3a of the main tower 3 are connected via a first direction rotating portion 13 as a first rotating portion and a second direction rotating portion 15 as a second rotating portion. Are joined. The 1st direction rotation part 13 is fixed on the base part 9, and is connected with the 2nd direction rotation part 15 by the rotating shaft 13a. The 2nd direction rotation part 15 is connected with the lower end part 3a of the main tower 3 by the rotating shaft 15a.

  The main tower 3 is rotated by the first direction rotation unit 13 around a rotation axis 13a substantially parallel to the arrangement direction of the main rope 39 as shown by an arrow A in FIG. Further, the main tower 3 is rotated around the rotation axis 15 a orthogonal to the arrangement direction of the main rope 39 by the second direction rotation unit 15.

  FIG. 4 is a perspective view of the vicinity of the joint between the upper end 7 a of the side stay 7 and the main tower 3. As shown in FIG. 4, the main tower 3 is provided with a side stay connecting portion 17 on a surface orthogonal to the surface on which the main rope mounting portion 5 is provided. The upper end portion 7 a of the side stay 7 is connected to the side stay connecting portion 17 of the main tower 3 using a spherical bearing 19. By using the spherical bearing 19, the slack of the main rope 39 due to the swing in the direction orthogonal to the arrangement direction of the main rope 39 of the main tower 3 at the connection portion between the main tower 3 and the upper end portion 7a of the side stay 7 is obtained. In order to cope with this, a swinging motion in a direction substantially parallel to the arrangement direction of the main rope 39 is also possible.

  FIG. 5 is a perspective view of the vicinity of the joint between the slide mechanism 21 and the lower end 7 b of the side stay 7. FIG. 6 is an elevational view of the slide mechanism 21. As shown in FIGS. 5 and 6, the slide mechanism 21 includes a slide guide 23, a slide base 25, a fixing pin 35, and the like.

  The slide guide 23 is a rectangular parallelepiped member, and is installed on the base portion 11 so that the longitudinal direction thereof is substantially orthogonal to the arrangement direction of the main rope 39. The slide guide 23 is provided with a space in the longitudinal direction therein.

  The slide base 25 is disposed in a space inside the slide guide 23. A side stay connecting portion 27 is provided on the upper surface of the slide base 25. A lower end portion 7 b of the side stay 7 is connected to the side stay connecting portion 27 using a spherical bearing 29. By using the spherical bearing 29, not only the direction orthogonal to the arrangement direction of the main rope 39 of the main tower 3 but also the arrangement direction of the main rope 39 of the main tower 3 corresponding to the slack of the main rope 39 is substantially parallel. The swinging motion at the connecting portion between the slide mechanism 21 and the lower end portion 7b of the side stay 7 is also possible in any direction.

  The slide base 25 is provided with a chill hole 37 on the lower surface. The slide base 25 is connected to wires 33 on two surfaces orthogonal to the longitudinal direction of the slide guide 23. The wire 33a connected to the surface far from the main tower 3 is connected to a winch 31a installed near the end of the base portion 11 on the side far from the main tower 3. The wire 33b connected to the surface close to the main tower 3 is connected to a winch 31b installed in the vicinity of the end of the base portion 11 on the side close to the main tower 3.

  In the slide mechanism 21, when the wire 33 is wound or unwound using the winch 31, the slide base 25 smoothly travels along the slide guide 23 by the chill hole 37. Then, the lower end portion 7b of the side stay 7 connected to the side stay connecting portion 27 of the slide base 25 moves in a direction substantially perpendicular to the arrangement direction of the main rope 39, that is, a direction indicated by an arrow B in FIG. The fixing pin 35 is a fixing jig that fixes the slide base 25 and the slide guide 23.

  FIG. 7 is a diagram illustrating an installation example of the cable crane 1. Fig.7 (a) is a top view of the cable crane 1 in the state in which the main tower 3 was installed substantially perpendicularly. FIG.7 (b) is the elevation which looked at the cable crane 1 from the direction of arrow D shown to Fig.7 (a). FIG. 7C is a plan view of the cable crane 1 in a state where the main tower 3 is inclined. FIG.7 (d) is the elevation which looked at the cable crane 1 from the direction of the arrow E shown in FIG.7 (c).

  When the cable crane 1 is used for construction of a dam body, etc., it is usually constructed with the main tower 3 tilted to the opposite side of the slide mechanism 21 as shown in FIGS. 7 (a) and 7 (b). To start. At the time of construction, the rotation at the rotating shaft 13a in the first direction rotating portion 13 and the rotation at the rotating shaft 15a in the second direction rotating portion 15 shown in FIG. In the slide mechanism 21 shown in FIG. 6, the slide base 25 and the slide guide 23 are fixed using a fixing pin 35. Accordingly, the movement of the lower end portion 7b of the side stay 7 and the swing of the main tower 3 can be fixed, and the position of the main tower 3 can be stably maintained.

  When the construction work range cannot be covered with the cable crane 1 in the state shown in FIGS. 7 (a) and 7 (b), the main tower 3 is installed as shown in FIGS. 7 (c) and 7 (d). The construction work range can be shifted by swinging and tilting and shifting the construction position of the main rope 39. FIG.7 (c) and FIG.7 (d) show the case where the main tower 3 is inclined to the slide mechanism 21 side.

  When the main tower 3 is swung as shown in FIGS. 7C and 7D, first, a fixing member (not shown) is installed to support the main tower 3, and the rotating shaft 15a shown in FIG. After the rotation about the rotation axis and the rotation about the rotation shaft 13a are made possible, the fixing member (not shown) is removed. Further, the fixing pin 35 of the slide mechanism 21 shown in FIG. 6 is removed, and the fixation between the slide base 25 and the slide guide 23 is released.

  Then, while winding the wire 33a of the slide mechanism 21 shown in FIG. 6 with the winch 31a, the wire 33b is unwound from the winch 31b, thereby causing the slide base 25 to travel away from the main tower 3. When the slide base 25 travels, the lower end 7b of the side stay 7 moves in the direction of the arrow F shown in FIG. 7D, and the rotary shaft 13a and the rotary shaft 15a shown in FIG. 3 and the spherical bearing 19 shown in FIG. The main tower 3 and the side stay 7 are swung by the action of the spherical bearing 29 shown in FIG. The main tower 3 swings in a direction substantially perpendicular to the arrangement direction of the main rope 39 as indicated by an arrow G in FIG.

  As described above, the main tower 3 is supported by the tension of the back anchor 41 shown in FIG. 2, but when the main tower 3 is swung as shown in FIGS. The distance between the anchor 43 of the anchor 41 and the main tower 3 is extended, and the tension of the back anchor 41 changes. In the cable crane 1, the upper end 7 a of the side stay 7 and the main tower 3 are connected using a spherical bearing 19, and the lower end 7 b of the side stay 7 and the slide mechanism 21 are connected using a spherical bearing 29. Since the tower 3 and the base part 9 of the main tower 3 are connected using the first direction rotating part 13 and the second direction rotating part 15, the main tower 3 is stabilized even if the tension of the back anchor 41 changes. Can be swung. In the cable crane 1, a tension adjusting mechanism for the back anchor 41 may be provided.

  After swinging the main tower 3 to an appropriate position, the main tower 3 is again supported by a fixing member (not shown). And the rotation of the rotating shaft 13a and the rotating shaft 15a shown in FIG. 3 is fixed. Further, the slide base 25 of the slide mechanism 21 shown in FIG. 6 is fixed to a predetermined position of the slide guide 23 using the fixing pin 35.

  When the main tower 3 is swung in the direction opposite to the arrow G shown in FIG. 7D, the wire 33a is unwound while winding the wire 33b of the slide mechanism 21 shown in FIG. In the direction of approaching the main tower 3.

  Thus, in the present embodiment, the lower end portion 7b of the side stay 7 is moved in a direction substantially perpendicular to the arrangement direction of the main rope 39 using the slide mechanism 21 installed on the base portion 11 of the side stay 7. As a result, the main tower 3 is swung in a direction substantially perpendicular to the arrangement direction of the main rope 39. Therefore, compared with a conventional cable crane, the work for swinging the main tower is simple. Moreover, the space for installation can be reduced and the position of the main tower can be stabilized. According to the present embodiment, the main tower can be stably swung with a simple and inexpensive configuration without using a large-scale apparatus.

In addition, the connection method of the lower end part 3a of the main tower 3 and the base part 9 is not restricted to what was mentioned above. For example, you may join by the hinge using a ball seat.
Further, the configuration of the slide mechanism is not limited to that described above. The slide mechanism may be configured so that the lower end portion 7b of the side stay 7 can be moved in a direction substantially perpendicular to the arrangement direction of the main rope 39.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ......... Cable crane 3 ......... Main tower 3a, 7b ......... Lower end part 5 ......... Main rope attachment part 7 ......... Side stay 7a ......... Upper end part 9, 11 ......... Base part 13 ... ...... First direction rotating part 13a, 15a ......... Rotating shaft 15 ......... Second direction rotating part 17, 27 ......... Side stay connecting part 19, 29 ......... Spherical bearing 21 ......... Sliding mechanism 23 ... …… Slide guide 25 ………… Slide base 31, 31a, 31b ……… Winch 33, 33a, 33b ……… Wire 35 ……… Fixing pin 37 ……… Chill hole 39 ……… Main rope 41 ……… Back Anka 43 ......... Anka 45 ......... Mt.

Claims (6)

A main tower for laying the main rope,
A side stay that supports the main tower in a direction substantially perpendicular to the direction in which the main rope is disposed;
A slide mechanism that is installed on the foundation of the side stay and moves the lower end of the side stay in a direction substantially perpendicular to the direction in which the main rope is disposed;
Comprising
The lower end of the main tower and the foundation of the main tower are joined, the side stay and the slide mechanism are joined,
A cable crane characterized in that the main tower is swung in a direction substantially perpendicular to an arrangement direction of the main rope by moving a lower end portion of the side stay using the slide mechanism.   A first rotating portion that rotates about a lower axis of the main tower and a foundation of the main tower about an axis substantially parallel to the main rope; and a second that rotates about an axis orthogonal to the main rope. The cable crane according to claim 1, wherein the cable crane is connected via a rotating part.   3. The cable according to claim 2, wherein after the main tower is swung and disposed at a predetermined position, the rotation at the first rotating portion and the rotation at the second rotating portion are fixed. crane.   The cable crane according to any one of claims 1 to 3, wherein an upper end portion of the side stay and the main tower are connected using a spherical bearing. The slide mechanism is
A slide guide,
A slide base that is connected to a lower end of the side stay and travels along the slide guide;
A fixing jig for fixing the slide base and the slide guide;
Comprising
The slide base is fixed to the slide guide using the fixing jig after the slide base is traveled to a predetermined position along the slide guide in a state where the fixing by the fixing jig is released. The cable crane according to any one of claims 1 to 4.   The cable crane according to claim 5, wherein a lower end portion of the side stay and the slide base are connected using a spherical bearing.

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