JP2005029364A - Crane device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crane device usable in wide application. <P>SOLUTION: This crane device 20 is used to construct or dismantle a steel tower 11 which is a tower-like structure. This crane device 20 is provided with fixing means such as a first fixing member 31a and a second fixing member 31b mounted on a main column 14 of the steel tower 11, a support rod 41, a support wire 42 or the like, a mast 21 fixed to the steel tower 11 through the fixing means, and a crane part 51 supported by the mast 21 from below. The mast 21 has a cylindrical main mast 22 and a cylindrical submast 23 inserted into the main mast 22. The mast 21 is extended and contracted by moving the submast 23 for the main mast 22. The crane device 20 is elevated and lowered in accordance with height of the steel tower 11 by extension and contraction of the mast 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a crane apparatus used for constructing or dismantling a tower-like building, and more particularly to a climbing crane apparatus that is operated up and down according to the height of the building.

  Conventionally, when dismantling a tower-like structure such as a steel tower, when a heavy machine such as a crane truck cannot enter in a mountainous area, an urban area, etc., a method called a bar construction method has been adopted. . The pedestal method is a method of suspending a steel frame or the like with a wire using a pedestal in the shape of a bar fixed so as to extend obliquely upward to a steel frame of a steel tower. The support bar is fixed so as to extend obliquely upward with respect to the steel frame by placing a branch line such as a wire between the upper end and the ground with the lower end supported by the steel frame. This pedestal method is a method that can be flexibly handled regardless of the scale, structure, etc. of the tower, but the fixing part for fixing one end of the branch line to the ground is located at a position about 30 to 40 m away from the center of the tower. It had to be set up and needed a large site for work. Therefore, for example, a climbing crane apparatus as shown in Patent Document 1 has been proposed as a crane apparatus that does not require a wide site for work.

That is, this climbing crane device includes a movable fixed ring, a mast, a jack-up device, and a crane. The movable fixing ring is detachably attached to a building unit block constituting the building. The mast is detachably attached to the already constructed building unit block via the fixing ring so as to be movable up and down with respect to the movable fixing ring. The jackup device is connected between the movable fixed ring and the mast. The crane is provided in the upper part of the mast and is configured to be able to suspend the building unit block. And the said crane apparatus is comprised so that a self-raising may be repeated according to the height of a building by raising / lowering a movable fixed ring or a mast in a scale type by the said jackup apparatus.
JP-A-8-31818

  However, according to the conventional climbing type crane apparatus, the structure is complicated by providing a jack-up device for raising and lowering the movable fixed ring or mast, and is added to the jack-up device at the time of raising and lowering. The burden will be great. For this reason, the jack-up device requires a strength that can withstand the burden during lifting and a performance that allows the jack-up device to lift and lower itself, and is inevitably large and heavy. On the other hand, the crane is required to have enough performance to suspend and lift the building unit block. Therefore, if the scale of the building increases, the crane must be large and heavy. . And considering the performance of jack-up devices, cranes, etc., the crane device itself must be large, and it is impossible to support the crane device in small buildings such as steel towers. There was a problem that the use was limited.

  The present invention has been made paying attention to such problems existing in the prior art. The object is to provide a crane apparatus that can be used in a wide range of applications.

  To achieve the above object, the invention of the crane apparatus according to claim 1 is used for constructing or dismantling a tower-like building, and is operated up and down according to the height of the building. An apparatus, comprising: a fixing means mounted on a structural material constituting the building; a mast fixed to the building via the fixing means; and a crane portion supported from below by the mast, The mast has a cylindrical main mast and a cylindrical sub mast inserted into the main mast, and is movable in accordance with the lifting operation by moving the sub mast relative to the main mast. The gist is that it is configured.

  The invention of the crane device according to claim 2 is the invention according to claim 1, wherein the elevating operation is an operation of extending and contracting the mast in a state where the main mast or the sub mast is fixed to the building by the fixing means. The gist is that the submast or the main mast is fixed to the building by the fixing means according to the expansion and contraction operations.

  The invention of the crane device according to claim 3 is the invention according to claim 1, wherein the lifting operation is connected to the sub mast or the main mast in a state where the main mast or the sub mast is fixed to the building by the fixing means. The gist of the present invention is that it is performed by repeating the operation of changing the mounting position of the fixing means on the building and the expansion and contraction of the mast in accordance with the change operation.

  As described above in detail, according to the present invention, it is possible to provide a crane apparatus that can be used in a wide range of applications.

Hereinafter, an embodiment in which a crane device of the present invention is embodied will be described with reference to the drawings.
As shown in FIGS. 1, 9, and 10, the tower 11 as a building is erected on a plurality of concrete bases 13 fixed on the ground 12 and the bases 13. And a plurality of main pillars 14 made of iron. These main pillars 14 are formed in an L-shaped cross section and are inclined in a direction in which they approach each other as they go upward. Further, although not shown, a plurality of sub-pillars are laid in a diagonal lattice between the main pillars 14. The steel tower 11 is formed in a tower shape by such structural materials as the base 13, the main pillar 14, and the sub pillar.

  The crane device 20 includes a fixing means attached to the structural material of the tower 11, a mast 21 fixed to the tower 11 via the fixing means, and a crane portion 51 supported from below by the mast 21. Yes. First, the fixing means will be described. The fixing means includes a fixing member that is fixed to the structural material, and a book member that is connected between the fixing member and the mast 21. As shown in FIGS. 3A and 3B, the fixing member 31 includes a sandwiching plate 32 and a pair of upper and lower fastening portions 33 that are substantially L-shaped in a plane. A connecting plate 34 protrudes from the outer surface of the sandwiching plate 32, and the connecting plate 34 is reinforced by a plurality of reinforcing plates 35. The first connecting hole 34a is formed at the upper portion and the second connecting hole 34b is formed at the lower portion. Is transparent. The fastening portion 33 is connected to the holding plate 32 by a connecting bolt 36 and a nut 37. The connecting bolt 36 is bent at an intermediate portion to form a space for accommodating the main pillar 14 between the fastening portion 33 and the sandwiching plate 32. Then, the fixing member 31 is fixed to the main column 14 by sandwiching the main column 14 between the fastening portion 33 and the clamping plate 32 and tightening the nut 37. The fixing members 31 are attached to the respective main pillars 14 in pairs, and when the fixing members 31 are distinguished from each other at the attachment positions to the main pillars 14, the upper members are the first fixing members 31 a, The lower one is referred to as a second fixing member 31b.

  The book-keeping member includes a support rod 41 having a rod shape and a support wire 42 made of a metal wire such as a chain or a wire. As shown in FIG. 2, the support rod 41 includes a cylindrical main rod 43 a and a cylindrical sub rod 44 inserted into the main rod 43 a, and corresponds to the distance between the mast 21 and the fixing member 31. By extending and contracting, the length can be adjusted. A ratchet mechanism (not shown) is provided between the main rod 43a and the sub rod 44, and the length adjustment is simplified by the ratchet mechanism, and the length of the support rod 41 is made minute according to the shaking of the mast 21. It is configured to absorb the shaking by changing. Further, connecting portions 45 for connecting to the mast 21 or the fixing member 31 are attached to both ends of the support rod 41. The support rod 41 has one end connected to the upper end of the mast 21 and the other end connected to the first connection hole 34a of the first fixing member 31a with a bolt or the like, and is stretched so as to extend in the horizontal direction. . On the other hand, the support wire 42 has one end connected to the lower portion of the mast 21 and the other end connected to the second connection hole 34b of the first fixing member 31a with a bolt or the like, and is laid so as to extend in an oblique direction. In the support rod 41, a connecting rod 46 is screwed to the other end of the sub rod 44 as a tension adjusting mechanism. For example, a lever block, a winch or the like is attached to at least one of both ends of the support wire 42 as a tension adjusting mechanism. These tension adjusting mechanisms adjust the tension so that the support rod 41 or the support wire 42 is placed between the mast 21 and the fixing member 31. The connecting rod 46 adjusts the tension by screwing or screwing the sub rod 44. The lever block, the winch and the like adjust the tension by pulling or loosening the support wire 42. When the tension adjusting mechanism is attached to only one end of the support wire 42, a connecting member such as the connecting portion 45 of the support rod 41 is attached to the other end.

  Next, the mast 21 will be described. As shown in FIG. 1, the mast 21 has a cylindrical main mast 22 and a cylindrical submast 23 inserted into the main mast 22. The mast 21 includes an expansion / contraction mechanism, and is configured to be extendable / contractable by moving the sub mast 23 with respect to the main mast 22 by the expansion / contraction mechanism. Examples of the expansion / contraction mechanism include an air cylinder, a hydraulic cylinder, a hydraulic motor, a winch, and the like, and any configuration may be used as long as the mast 21 can be expanded and contracted. In particular, the air cylinder and the hydraulic motor can hold the mast 21 at an arbitrary length desired by the operator, and are more preferable as an extension mechanism.

  At the upper end portion of the main mast 22, a connecting projection piece 24 for connecting the book setting member (support rod 41) is projected. A ring-shaped connecting member 25 is fitted on the lower peripheral surfaces of the main mast 22 and the sub-mast 23, and a book member (support line 42) is connected to the outer peripheral surface of the connecting member 25. A connecting projecting piece 24 is projected. Four connecting protrusions 24 are provided at regular intervals in the circumferential direction of the main mast 22 or the sub mast 23. A restriction ring 27 for restricting the movement of the sub-mast 23 relative to the main mast 22 is attached to the lower end of the sub-mast 23 at a position above the connecting member 25. The amount of expansion / contraction of the mast 21 can be adjusted by appropriately changing the mounting position of the restriction ring 27 on the sub-mast 23.

  A guide ring 26 is loosely fitted on the peripheral surface of the main mast 22, and the guide ring 26 is configured to be movable between the connecting projection piece 24 and the connecting member 25 on the main mast 22. On the outer peripheral surface of the guide ring 26, four connection protrusions 24 similar to the connection member 25 are provided, and a guide wire 43 is connected between the connection protrusion 24 and the second fixing member 31b. Has been. The guide wire 43 has substantially the same configuration as the support wire 42, is formed from a metal wire, and a tension adjusting mechanism is attached to at least one of both ends. When the guide wire 43 is stretched by this tension adjusting mechanism, the guide ring 26 is positioned at substantially the same height as the second fixing member 31b, and the guide wire 43 is stretched so as to extend in the horizontal direction. The guide ring 26, the guide wire 43, and the like constitute guide means. The guide means guides the expansion / contraction direction of the mast 21 and suppresses the shaking of the mast 21 during expansion / contraction, fixation, and the like.

  As shown in FIGS. 9 and 10, a support base 28 can be attached to the lower end surface of the sub-mast 23. The support base 28 includes a support plate 28a placed on the ground 12 and support legs 28b protruding from the upper surface of the support plate 28a. The support plate 28a can be connected with a book-keeping member (support line 42) at its peripheral edge. The support leg 28b is composed of a pair of members connected so as to be rotatable. The mast 21 of the crane device 20 can be brought down by rotating and bending an intermediate portion thereof, such as installation work and recovery work. The workability is improved.

  The crane unit 51 includes a swivel base 52, a support arm 53 that is erected and fixed on the swivel base 52, and a boom 54 that is rotatably coupled to the upper end of the support arm 53. The swivel base 52 has a swivel mechanism (not shown), and is configured to be rotatable around the axis of the mast 21 at the upper end of the mast 21. The boom 54 has a cylinder 55 installed between the base end portion and the swivel base 52, and rotates around the base end portion by the expansion or contraction of the cylinder 55 to raise or lower the tip end portion. It is configured to be able to. A hook 57 is suspended from a distal end portion of the boom 54 via a wire 56, and the proximal end of the wire 56 is connected to a winding mechanism (not shown) such as a winch to raise or lower the hook 57. It is possible. And the said crane part 51 performs planar position alignment by rotating the boom 54, rotating the turntable 52 with respect to a structural material, and performs three-dimensional position alignment by the raising or lowering of the hook 57. FIG. Thus, the structural material is lifted or hung.

Next, the operation of the crane apparatus will be described below.
As shown in FIG. 1, the crane device 20 is installed at the upper end inside the tower 11 in order to disassemble or construct the tower 11, and without supporting the lower end of the mast 21 to the ground, the support rod 41, It is used in a state of being suspended in the steel tower 11 by fixing means such as the support wire 42. In this state, the mast 21 is arranged at the center of the steel tower 11 in a plan view by extension members such as a support rod 41 and a support wire 42 extending from four directions. The arrangement in which the mast 21 is arranged at the center of the steel tower 11 is possible only when the mast 21 is fixed to a state where the mast 21 is suspended by a support rod 41, a support wire 42, and the like. That is, the lengths of the support rod 41, the support line 42, etc. can be adjusted, and the mast 21 can be easily placed at the center of the building by changing the length appropriately according to the scale, structure, etc. of the building. It can be placed. Further, since the lower end of the mast 21 is not grounded, the mast 21 can be shortened, the size and weight can be reduced, and resistance from the ground is not received. Position adjustment by the support line 42 is simplified.

  Further, by arranging the mast 21 in the center of the steel tower 11 in a plan view, it is possible to reduce the weight of the boom 54 while making the turning range of the boom 54 necessary and sufficient. That is, as shown in FIG. 4B, when the crane apparatus 20 is installed on the outer surface of the steel tower 11, in order for the tip of the boom 54 to reach any part of the steel tower 11, The length must be L2 in the figure and the turning range indicated by the chain line in the figure. On the other hand, as shown in FIG. 4A, when the mast 21 is arranged at the center of the steel tower 11, the length of the boom 54 is set to L1 in the drawing, and the turning range indicated by the chain line in the drawing is used. That's enough. When the lengths L1 and L2 of the boom 54 are compared, the length L1 is shorter, so that the boom 54 can be made smaller and lighter. In addition, when the mast 21 is arranged at the center of the steel tower 11, the loads of the mast 21 and the crane part 51 can be distributed approximately equally to the support rods 41, the support wires 42, and the like. In addition, when the crane unit 51 is operated, the mast 21 is in a contracted state, and the main mast 22 and the sub-mast 23 are overlapped, whereby strength and rigidity are improved. Therefore, while having a simple configuration of the mast 21, the expansion and contraction mechanism for raising and lowering the crane device 20 on the mast 21 and the strength and rigidity that can withstand operations such as turning of the crane portion 51, lifting or hanging of the structural material, etc. It becomes possible to grant.

Next, the raising / lowering operation of the crane apparatus will be described.
The crane device 20 is a climbing type that is lifted and lowered according to the height of the building at the time of construction or dismantling. First, the descent by the raising / lowering operation of the crane apparatus 20 at the time of dismantling is demonstrated. As shown in FIG. 5, in the first stage of lowering, the boom 54 is turned upward to rise. Further, a new support line 42 is connected between the second connection hole 34b of the second fixing member 31b and the connection protrusion 24 of the connection member 25 of the submast 23 in a loosened state. As shown in FIG. 6, in the second stage of lowering, the sub-mast 23 is moved downward with respect to the main mast 22 by operating the telescopic mechanism and extending the mast 21. Thereafter, the support wire 42 connected between the second fixing member 31b and the connecting member 25 of the sub-mast 23 is stretched in accordance with the extension of the mast 21. As shown in FIG. 7, in the third stage of lowering, the support rod 41, the support wire 42, and the first fixing member 31 a are removed, and the main mast 22 is fixed to the steel tower 11. In this state, the main mast 22 is movable in the vertical direction while being supported by the second fixing member 31b via the guide ring 26 and the guide wire 43. On the other hand, the lower end of the sub-mast 23 is fixed to the second fixing member 31 b via the support line 42 and the upper end is supported by the guide means such as the guide ring 26 via the main mast 22.

  As shown in FIG. 8, in the fourth stage of lowering, the main mast 22 guided by the guide means such as the guide ring 26 is moved downward with respect to the sub-mast 23 by operating the telescopic mechanism and contracting the mast 21. Moved. In the fifth stage of the descent, a new fixing member 31 is attached to the main pillar 14 of the tower 11, and the support rod 41 and the support wire 42 are mounted between the fixing member 31 and the main mast 22, thereby the main mast. 22 is fixed to the steel tower 11. And while removing the support line 42 which fixes the submast 23, the new fixing member 31 is attached to the steel tower 11, and the crane line 20 is shown in FIG. 1 by attaching the guide wire 43 etc. to this fixing member 31 again. It will be in a state and the raising / lowering operation at the time of a fall will be completed. That is, the raising / lowering operation at the time of lowering is performed by sequentially repeating the extending operation of the mast 21, the fixing operation of the sub-mast 23, the contracting operation of the mast 21, and the fixing operation of the main mast 22.

  When the lowering is repeated and the lower end of the crane apparatus 20 reaches the ground 12, the support base 28 is attached to the lower end of the submast 23. Thereafter, the support base 28 is grounded, the support wire 42 is placed between the support base 28 and the base 13, and the support line 42 is placed between the support base 28 and the upper end of the main mast 22. As a result, the crane device 20 is erected and fixed on the ground 12 and the dismantling operation is resumed. In addition, after the dismantling work is completed, the crane device 20 first removes the boom 54, and then, as shown in FIG. Collected.

  Next, the rise by the raising / lowering operation of the crane apparatus 20 at the time of construction will be described. First, as shown in FIG. 10, support lines 42 are connected between the support base 28, the base 13 and the main mast 22 in a state where the mast 21 is tilted. After that, the mast 21 is raised by setting the support line 42 erected on the main mast 22 to be stretched, and the boom 54 is attached to install the crane device 20. And after assembling the steel tower 11 to predetermined height using the crane apparatus 20, the crane apparatus 20 is raised.

  In the first stage of ascent, the boom 54 is first turned up by turning upward, and the second fixing member 31 b is attached to the main pillar 14 of the tower 11. Thereafter, as shown in FIG. 8, the guide ring 26 is moved upward, and the guide wire 43 is built between the guide ring 26 and the second fixing member 31b, and the lower end of the sub-mast 23 and the second A support line 42 is placed between the fixed member 31b. In the second stage of ascending, as shown in FIG. 7, the main mast 22 guided by the guide ring 26 and the like is moved upward with respect to the sub-mast 23 by operating the telescopic mechanism and extending the mast 21. . In the third stage of ascending, as shown in FIG. 6, the first fixing member 31 a is mounted on the steel tower 11, and the support rod 41 and the support wire 42 are installed between the first fixing member 31 a and the main mast 22. The main mast 22 is fixed to the steel tower 11. In the fourth stage of ascending, the sub-mast 23 is moved upward with respect to the main mast 22 by operating the telescopic mechanism and contracting the mast 21 as shown in FIG. Thereafter, the support line 42 between the sub-mast 23 and the second fixing member 31b is removed, and the lifting operation at the time of lifting is completed. In addition, when raising the crane apparatus 20 from the state shown in FIG. 1, it is completely the same except that the support rod 41 and the support wire 42 are removed first in the 1st step | level of a raise. That is, the raising / lowering operation at the time of ascending is performed by sequentially repeating the fixing operation of the sub-mast 23, the extending operation of the mast 21, the fixing operation of the main mast 22, and the contracting operation of the mast 21.

The effects exhibited by the above embodiment will be described below.
According to the crane device 20 of the embodiment, the mast 21 that supports the crane unit 51 includes the main mast 22 and the sub mast 23, and is configured to be stretchable by moving the sub mast 23 relative to the main mast 22. ing. And when this mast 21 is expanded or contracted, the crane apparatus 20 is raised or lowered according to the height of the building. The mast 21 is configured to be extendable and contractable by a main mast 22 and a sub-mast 23, and the configuration is simple and the weight is reduced. Since the entire mast 21 is stretched or contracted, the load applied when the crane device 20 is raised or lowered can be received not only by a part of the mast 21 but also by the whole. When the crane unit 51 is operated, the mast 21 is contracted, and the main mast 22 and the sub-mast 23 are overlapped to ensure necessary and sufficient strength and rigidity. In addition, the mast 21 expands and contracts by operating an internal expansion / contraction mechanism. Therefore, the configuration related to the lifting operation can be simplified, and the crane device 20 can be used in a wide range of applications.

  -The raising / lowering operation of the crane apparatus 20 is performed by repeating the expansion or contraction operation of the mast 21 and the fixing operation of the main mast 22 or the sub mast 23 with respect to the steel tower 11. Therefore, the raising / lowering operation can be easily performed by repeating simple operations.

In addition, this embodiment can also be changed and embodied as follows.
The building is not limited to the steel tower 11 shown in the embodiment, and may be any thing as long as it has a tower shape such as a building or a tower.

  -The expansion and contraction mechanism of the mast 21 may be omitted. In the embodiment, the mast 21 is automatically expanded or contracted by an expansion / contraction mechanism. On the other hand, when the expansion / contraction mechanism is omitted, the mast 21 is expanded or contracted according to the tension adjustment mechanism provided in the fixing means when the support wire 42 is stretched or loosened. Further, in this case, in order to hold the mast 21 in an extended state or a contracted state, an expansion / contraction state holding means such as a clamp or a pin may be provided.

The tension adjusting mechanism provided in the fixing means may be omitted, and the support line 42 and the like may be stretched or loosened according to the expansion or contraction of the mast 21.
-The crane apparatus 20 is not necessarily arranged in the center of the building in plan view, and may be arranged in any location as long as it is inside the building.

  The crane device 20 is not limited to being fixed in a state of being hung inside the building by the fixing means, but may be attached to the outside of the building. In this case, examples of the fixing means include a clip and a clamp for attaching the mast 21 of the crane apparatus 20 to the outside of the building.

  -The main pillar 14 which is a structural material of the steel tower 11 is not limited to an L-shaped cross section, and may be, for example, cylindrical or cylindrical. Further, the sub-column which is a structural material may have any shape such as an L-shaped cross section, a cylindrical shape, or a columnar shape.

Further, the technical idea that can be grasped from the embodiment will be described below.
(1) The mast is arranged inside the building, and is suspended from the top of the building by a fixing means built between the mast and the structural material constituting the building. The crane apparatus according to any one of claims 1 to 3, wherein the crane apparatus is provided.

  (2) The fixing means includes a plurality of support rods formed in a rod shape between the upper part of the mast and the structural material constituting the building, and the lower part of the mast and the structural material constituting the building. The crane apparatus according to any one of claims 1 to 3, wherein the crane apparatus includes a plurality of wires that are mounted on the rack.

(3) The crane apparatus according to any one of claims 1 to 3, wherein the mast includes guide means for guiding an expansion / contraction direction during an elevating operation.
(4) The crane apparatus according to any one of claims 1 to 3, wherein the mast is contracted during operation of the crane unit.

The front view which shows the crane apparatus of embodiment. The front view which shows a support rod. (A) is a top view which shows a fixing member, (b) is a front view which shows a fixing member. (A), (b) is a conceptual diagram which shows the turning range of a crane apparatus. The front view which shows the state by which a crane apparatus is raised / lowered. The front view which shows the state by which the mast was extended | stretched. The front view which shows the state which cancelled | released fixation of the main mast. The front view which shows the state by which the mast was contracted. The front view which shows the state which uses a crane apparatus in a grounding state. The front view which shows the state which installs or collect | recovers a crane apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 20 ... Crane apparatus, 21 ... Mast, 22 ... Main mast, 23 ... Sub mast, 31 ... Fixing member which comprises fixing means, 41 ... Support rod which comprises fixing means, 42 ... Support wire which comprises fixing means, 51 ... Crane part.

Claims (3)

A crane apparatus that is used to construct or dismantle a tower-like building, and is operated up and down according to the height of the building,
A fixing means attached to a structural material constituting the building; a mast fixed to the building via the fixing means; and a crane portion supported from below by the mast. And a cylindrical submast inserted into the main mast, and the submast is moved with respect to the main mast so as to expand and contract in accordance with the lifting operation. A crane device characterized by being. The raising / lowering operation is performed by extending and contracting the mast in a state where the main mast or the sub mast is fixed to the building by the fixing means, and fixing the sub mast or the main mast to the building by the fixing means according to the extension and contraction operation. The crane apparatus according to claim 1, wherein the crane apparatus is performed by repeating the fixing operation. The raising / lowering operation is performed by changing the mounting position of the fixing means connected to the sub-mast or the main mast in a state where the main mast or the sub-mast is fixed to the building by the fixing means, and the mast corresponding to the changing operation. The crane apparatus according to claim 1, wherein the crane apparatus is performed by repeating extension and contraction operations.

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