JP2007186307A - Mast holding device for tower crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mast holding device for a tower crane capable of increasing vibration suppressing performance and preventing collapse of a mast favorably when holding the mast of the tower crane. <P>SOLUTION: This mast holding device for the tower crane is provided with a supporting frame 11 for connecting the mast M of the tower crane T with a structure 20 provided by surrounding the mast M and having a plurality of stories to hold the mast M by the supporting frame 11. This supporting frame 11 is erected on the structure 20 and is arranged across the stories in the structure 20, and its upper end part is attached to the mast M to restrain and support travel of the mast M in the horizontal direction by the supporting frame 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mast holding device for a tower crane.

When building a structure such as a high-rise building, a tower crane is often used. In this tower crane, a crane is arranged on the top of the mast, and as the construction of the structure progresses, the mast is raised by, for example, adding the mast, and the crane work is performed from a high place. Conventionally, a mast holding device is known in order to prevent the mast from toppling due to vibration such as an earthquake. As such a mast holding device, there is a conventional tower crane earthquake-proof support device disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-145580. This earthquake-resistant support device for a tower crane includes a first support member and a second support member that are horizontally disposed with one end fixed to the structure and the mast. Further, an earthquake-resistant damper is installed between the tips of the first support member and the second support member, and a trigger mechanism is provided for causing the earthquake-resistant damper mechanism to function at a predetermined axial force or more. Further, the trigger mechanism is provided with a ring that is fixed between the side tip of the first support member and the side tip of the second support member and breaks at a center portion or more at a predetermined axial force. That's it.
JP 2002-145580 A

  However, in the earthquake-resistant support device for a tower crane disclosed in Patent Document 1, the first support member and the second support member, each of which is fixed to the structure and the mast, are arranged horizontally. For this reason, since the support member can only support up to a height position where the construction of the structure has progressed, vibration of the mast at a position higher than the height at which the construction of the structure has progressed cannot be suppressed. Therefore, there is a room for suppressing the vibration of the entire mast.

  Then, the subject of this invention is providing the mast holding | maintenance apparatus of a tower crane which can improve vibration suppression performance further and can prevent the collapse of a mast etc. further in holding the mast of a tower crane.

  A tower crane mast holding device according to the present invention that solves the above-described problems includes a support frame that connects the mast of the tower crane and a structure on multiple floors that are provided surrounding the mast, and holds the mast by the support frame. This is a tower crane mast holding device, and each support frame is erected on the structure, arranged across the hierarchy in the structure, and the upper end is attached to the mast. It restrains and supports movement in the rotational direction.

  The tower crane mast holding device according to the present invention includes a support frame that connects the mast of the tower crane and a multi-story structure provided surrounding the mast. The support frame is disposed across the layers in the structure, and restrains and supports the movement of the mast in the horizontal direction and the rotation direction. For this reason, the mast can be supported at a position higher than the position where the construction of the construct has progressed. Therefore, it is possible to suppress the vibration of the mast at a position higher than the height at which the construction of the building is advanced, so when holding the mast of the tower crane, the vibration suppression performance is further improved and the mast collapse is suitably prevented can do.

  Here, it can be set as the aspect by which the support frame is attached to the said mast via the horizontal damper which each absorbs a vibration of a horizontal direction. In addition, each of the support frames may include a frame body and a vertical damper that absorbs vibration in the vertical direction.

  Thus, since the support frame is attached to the mast via the horizontal damper / vertical damper, vibrations in the horizontal direction / vertical direction of the mast can be efficiently absorbed. Therefore, when holding the mast of the tower crane, it is possible to further improve the vibration suppression performance and suitably prevent the mast from collapsing. In addition, the vertical direction here includes not only the vertical direction but also an inclination direction between the vertical direction and the horizontal direction.

  According to the tower crane mast holding device of the present invention, when holding the tower crane mast, the vibration suppression performance can be further improved, and the mast collapse can be suitably prevented.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted. FIG. 1 is a perspective view of a mast holding device for a tower crane according to a first embodiment of the present invention, FIG. 2A is a plan view thereof, and FIG. 1B is a side view thereof.

  As shown in FIG. 1, a tower crane mast holding device (hereinafter referred to as “mast holding device”) 1 according to this embodiment is erected on a structure 20 to support a mast M in a tower crane T. The structure 20 is provided so as to surround the mast M, and includes a column member 21 and a beam member 22 as shown in FIG. The mast M is disposed at a position between the two beam members 22, and a crane C is provided on the top of the mast M as shown in FIG. 1. Seats 23 are provided at four positions surrounding the mast M on the surface of the beam member 22. The mast holding device 1 is erected on these seats 23.

  The mast holding device 1 includes four support frames 11. Each of these support frames 11 has a bar shape and is erected on a seat 23. A ring frame 12 is attached to the mast M above the beam member 22, and a fitting member 13 is interposed between the ring frame 12 and the mast M. Both upper ends of the support frame 11 are fixed to the ring frame 12, and the support frame 11 is attached to the mast M through the ring frame 12 and the fitting member 13 by rigid joining. Thus, the support frame 11 restrains and supports the movement of the mast M in the horizontal direction via the ring frame 12 and the fitting member 13.

  In addition, the structure 20 is a structure having a plurality of floors, and the support frame 11 is disposed across the layers in the structure 20. In the example illustrated in FIG. 1, the support frame 11 is erected on the beam member 22 located on the uppermost floor of the beam members 22 that have been constructed. For this reason, the upper floor of the beam member 22 that has been constructed has not been constructed yet, but the upper end position of the support frame 11 is higher than the ascending floor when the upper floor is constructed sequentially thereafter. Placed in position.

  Furthermore, a reinforcing frame 14 that reinforces the space between the adjacent support frames 11 is disposed in the middle of the support frame 11 in the height direction. The reinforcing frame 14 prevents the entire support frame 11 from shaking.

  The operation of the mast holding device according to this embodiment having the above configuration will be described. The mast holding device 1 according to the present embodiment includes a support frame 11, and the support frame 11 is disposed across the hierarchy of the structure 20. For this reason, in supporting the mast M by the support frame 11, only the construction of the beam member 22 on the predetermined floor is completed, and even when the construction of the beam member 22 on the upper floor from the predetermined floor is not completed, The mast M can be held at a position higher than the predetermined floor. For this reason, compared with the case where the mast M is supported horizontally from a predetermined floor, for example, the mast M can be held at a high position, so that the vibration suppression performance can be improved, and the collapse of the mast M is suitably performed. Can be prevented.

  In the mast holding device according to the embodiment, the support frame 11 restrains and supports the movement of the mast M in the horizontal direction. For this reason, the vibration suppression effect of the mast M is made higher. Now, as shown in FIG. 3A, when the mast M is not supported in the horizontal direction, it is assumed that the mast M vibrates with a vibration width L1. In this case, as shown in FIG. 3 (b), when the mast M is supported from the horizontal direction at the height of the support point P2 by the support member S2, the protruding length can be shortened compared with FIG. 3 (a). Further, the rigidity of the entire crane including the support member can be increased and the natural period can be shortened, and even when resonance occurs in the state of FIG. Also, the amplitude L2 of the mast M can be made smaller than the amplitude L1 when the mast M is not supported in the horizontal direction. These effects can reduce the reaction force of the support point and the bending of the mast. Thus, it is also disclosed in Patent Document 1 that the height of the fixing point (on the housing side) of the support member and the height of the mast support point are arranged substantially horizontally.

  On the other hand, as shown in FIG. 3C, when the mast support point P3 is provided at a position higher than the fixing point of the support member S3 (on the housing side), as shown in FIGS. 3B and 3C. If the heights h of the fixing points of the support members S2 and S3 (on the housing side) are aligned, the jumping length can be shortened as compared with FIG. 3B, and the rigidity of the entire crane including the support members is further increased. The natural period can be shortened, and resonance can be avoided even when resonance occurs in the state of FIG. Also, the amplitude L3 of the mast M can be made smaller than the amplitude L2. Due to these effects, the reaction force at the support point and the bending of the mast can be made smaller than in FIG. In the mast holding device according to this embodiment, the support frame 11 has a support structure shown in FIG.

  Hereinafter, modifications of the present embodiment will be described. So far, the aspect in which the support frame 11 is erected on the beam member 22 located on the uppermost floor among the beam members 22 that have been constructed has been described. However, the support frame 11 is erected on the beam member 22 other than the uppermost floor. You can also For example, as shown in FIG. 4, the support frame 11 can be erected on the beam member 22 </ b> B of the lowermost floor of the beam member 22 </ b> A on the uppermost floor. In this case, the support frame 11 can be installed even when the construction of the uppermost beam member 22A is not completed.

  In the aspect shown in FIG. 4, since the support frame 11 is arrange | positioned ranging over the hierarchy of the structure 20, the site | part which restrains the horizontal movement of the mast M is from the height position of the beam member 22A of the top floor. Is also higher. Therefore, the vibration of the mast M can be suppressed more appropriately than when the mast M is supported by arranging the support frame horizontally from the uppermost beam member 22A.

  In the above aspect, the support frame 11 is erected on the beam member 22, but the support frame 11 may be erected on a portion other than the beam member 22. FIG. 5 is an example in which a support frame is erected on the gantry. As shown in FIG. 5, the mast holding device 10 in this aspect includes a gantry 15, and four seats 23 are provided on the gantry 15. A support frame 11 is erected on each of these four seats, and the upper ends thereof are all fixed to the ring frame 12. The support frame 11 is connected to the mast via the ring frame 12 and the fitting member 13. It is attached to M by a rigid joint.

  Further, the gantry 15 is fixed to the beam member 22, and the mast M is erected on the gantry 15. In the tower crane of this aspect, the mast M is raised by changing the mount 15 onto the beam member 22 on the upper floor as it goes to the upper floor.

  As shown in FIG. 5, the support frame 11 may be erected on the mount 15 fixed to the beam member 22. Moreover, in this aspect, the support frame 11 is arrange | positioned ranging over 3 levels. For this reason, the vibration suppression effect of the mast M can be further enhanced.

  Further, a horizontal damper may be interposed between the support frame 11 and the mast M. 6A and 6B show an example in which an oil damper is interposed as a horizontal damper between the support frame 11 and the mast M, and FIG. 6C shows an example in which a plastic damper is interposed as a horizontal damper. In the example shown in FIG. 6A, one end side of the oil damper D1 is fixed to the tip end portion of the support frame 11, and the other end side of the oil damper D1 is fixed to the mast M. Thus, by fixing the support frame 11 and the oil damper D1, and the mast M and the oil damper D1, the oil damper D1 can be interposed between the support frame and the mast M.

  In the example shown in FIG. 6B, the oil damper D1 is pin-joined at the tip of the support frame 11, and the mast M and the other end of the oil damper D1 are pin-joined. Thus, the oil damper D1 can be interposed between the support frame and the mast M by pin-joining the support frame 11 and the oil damper D1, and the mast M and the oil damper D1.

  Further, in the example shown in FIG. 6C, a plastic damper D2 is interposed between the support frame 11 and the mast M. In this way, by interposing the oil damper D1 and the plastic damper D2 as the horizontal damper between the support frame 11 and the mast M, the vibration of the mast M can be efficiently suppressed, and the collapse of the mast is further reduced. It can prevent suitably.

  Moreover, it is also possible to adopt a mode in which a vertical damper (an oblique damper) is provided together with the support frame as in the mode shown in FIG. FIGS. 7A and 7B are examples in which an oil damper is interposed between the support frame 11 and the mast M as a vertical damper. In the example shown in FIG. 7A, the support frame 11 is erected on the beam member 22, and the middle reinforcing frame 16 is provided on the upper end portion of the support frame 11. The middle reinforcing frame 16 has a rectangular shape in plan view and a hollow shape with hollow portions, and the upper end portions of the support frame 11 are fixed to the four corners, respectively.

  Further, upper support frames 17 are erected on the upper surfaces of the four corners of the middle reinforcement frame 16, and upper ends of the upper support frames 17 are pin-joined to the four corners of the upper reinforcement frame 18, respectively. The upper support frame 17 includes an outer frame portion 18A and an inner frame portion 18B, and the upper support frame 17 is pin-bonded to four corners of the outer frame portion 18A. Further, a hollow portion is formed in the central portion of the inner frame portion 18B in plan view, and the mast M passes through the hollow portion. Further, a fitting member 13 is fitted between the inner frame portion 18B of the upper reinforcing frame 18 and the mast M. The support frames 11 and 17 are attached to the mast M via the reinforcing frames 16 and 18 to support the mast M.

  Further, the lower end portion of the oil damper D3 is pin-joined at the four corner positions of the middle reinforcing frame 16, and the upper end portion of the oil damper D3 is pin-joined at the four corners of the inner frame portion 18B of the upper reinforcing frame 18. ing. The oil damper D3 functions as a vertical damper and suppresses the vibration of the mast M.

  In the example shown in FIG. 7B, the support frame 11 is erected on the beam member 22, and the upper end portion of the support frame 11 is pin-joined to the upper reinforcing frame 18. The mast M is supported by the support frame 11 via the upper reinforcing frame 18. Further, the lower end portion of the oil damper D4 is pin-bonded to the beam member 22, and the upper end portion of the oil damper D4 is pin-bonded to the four corners of the inner frame portion 18B of the upper reinforcing frame 18. The oil damper D4 functions as a vertical damper and suppresses the vibration of the mast M. In this way, by interposing the oil damper D4 as the vertical damper between the support frame 11 and the mast M, the vibration of the mast M can be efficiently suppressed, and the collapse of the mast is further preferably prevented. be able to.

  Next, a second embodiment of the present invention will be described. FIG. 8A is a side view of the mast holding device according to the present embodiment, FIG. 8B is a side view of the modified example, and FIG. 8C is a side view of the modified example.

  As shown in FIG. 8A, in the mast holding device 30 according to this embodiment, a support frame 31 is erected on the beam member 22 in the structure 20. A bracket 25 is provided at a mounting position of the support frame 31 on the beam member 22, and the support frame 31 is erected on the beam member 22 by being pin-connected to the bracket 25.

  The support frame 31 is arranged across the layers in the structure 20. In the example shown in FIG. 8A, the support frame 31 is erected on the beam member 22 located on the uppermost floor of the beam members 22 that have been constructed. For this reason, the upper floor of the beam member 22 that has been constructed has not been constructed yet, but the upper end position of the support frame 31 is higher than the ascending floor when the upper floor is constructed after the construction. It is the same as that of said 1st embodiment to arrange | position to a position.

  The upper end of the support frame 31 is connected to the mast M. A bracket 26 is provided at a position where the mast M is connected to the support frame 31. An upper end portion of the support frame 31 is connected to the mast M through a bracket 26 by being pin-joined. As described above, the support frame 31 is pin-bonded to the mast M to restrain and support the movement of the mast M in the rotation direction.

  The operation of the mast holding device according to this embodiment having the above configuration will be described. The mast holding device according to the present embodiment includes a support frame 31, and the support frame 31 is disposed across the hierarchy of the structure 20. Therefore, in supporting the mast M by the support frame 31, only the construction of the beam member 22 on the predetermined floor is completed, and even when the construction of the beam member 22 on the upper floor is not completed, The mast M can be held at a height position higher than the predetermined floor. For this reason, compared with the case where the mast M is supported horizontally from a predetermined floor, for example, the mast M can be held at a high position, so that the vibration suppression performance can be improved, and the collapse of the mast M is suitably performed. Can be prevented.

  In the mast holding device according to the above embodiment, the support frame 31 restrains and supports the movement of the mast M in the rotation direction. For this reason, the vibration suppression effect of the mast M is made higher. In the mast holding device according to the present embodiment, as shown in FIG. 3D, the movement in the rotation direction around the rotation center O in the mast M is restrained and supported. For this reason, the rigidity of the entire crane including the support member is further increased as compared with FIG. 3C, and the natural period can be shortened, and even when resonance occurs in the state of FIG. Is possible. Also, the amplitude L4 of the mast M can be made smaller than the amplitude L3. Due to these effects, the reaction force at the support point and the bending of the mast can be made smaller than in FIG.

  Hereinafter, modifications of the present embodiment will be described. FIGS. 8B and 8C are modifications of the second embodiment. In the example shown in FIG. 8B, an intermediate reinforcing frame 32 is provided between the support frames 31. Both end portions of the intermediate reinforcing frame 32 are pin-bonded to the support frame 31. By providing the intermediate reinforcing frame 32, strength can be imparted to the support frame 31, and the movement of the mast M in the rotation direction can be restrained and supported more firmly. As a result, the vibration of the mast M can be suppressed more suitably.

  In the example shown in FIG. 8C, a support frame base 33 and a support frame 34 are provided. The support frame base 33 includes a rectangular horizontal portion that is horizontally disposed, and inclined portions that are obliquely disposed continuously at both ends of the horizontal portion. Support frames 34 are provided between both ends of the flat portion of the support frame base 33 and the mast M. The lower end portion of the support frame 34 is pin-joined to the support frame base 33, and the upper end portion is pin-joined to the mast M. The support frame 34 restrains and supports movement in the rotation direction of the mast M. As described above, even when the support frame 34 is provided on the support frame base 33, the vibration of the mast M can be efficiently suppressed, and the collapse of the mast can be prevented.

  Further, in the example shown in FIG. 9A, an oil damper D5 is used as the support frame itself, and this oil damper D5 is interposed between the support frame base 33 and the mast M. The lower end of the oil damper D5 is pin-bonded to the horizontal end 33 of the support frame base, and the upper end is pin-bonded to the mast M. The oil damper D5 is disposed obliquely in the oblique direction and functions as a vertical damper. Thus, by using the oil damper D5 as the support frame, the vibration of the mast M can be efficiently suppressed, and the collapse of the mast can be prevented.

  In the example shown in FIG. 9B, an oil damper D6 is used as the support frame itself. The lower end portion of the oil damper D6 is pin-bonded to the beam member 22, and the upper end portion is pin-bonded to the mast M. Thus, even if the oil damper D6 is used as a support frame, the movement of the mast M in the rotational direction can be restrained and supported. As a result, the vibration of the mast M can be suppressed more suitably. Moreover, since it is not necessary to prepare a support frame separately, it can contribute to the reduction of the number of members used for construction.

  As another modification, in each of the above embodiments, the support frame is a simple frame type using a rod-shaped frame. For example, a truss frame type as shown in FIG. A surface frame type as shown in FIG. 10B can also be used.

  In the example shown in FIG. 10A, the support frame 40 is provided on the gantry 15, and the horizontal frame member 41 disposed along the surface of the gantry 15 and the mast M standing direction (vertical direction). Four sets of the vertical frame member 42 arranged along and the inclined frame member 43 arranged along the oblique direction (inclination direction) are provided.

  One end of the horizontal frame member 41 is connected to the lower end of the vertical frame member 42, and the other end of the horizontal frame member 41 is connected to one end of the inclined frame member 43. Further, the upper end portion of the vertical frame member 42 is connected to the other end portion of the inclined frame member 43. A truss shape is formed by these frame members 41 to 43. Further, the connection portion between the vertical frame member 42 and the inclined frame member 43 is fixed to the ring frame 12.

  By using the truss-shaped support frame 40 in this way, the mast M can be held more firmly, so that the vibration suppression performance can be improved, and the collapse of the mast M can be suitably prevented. . Such a truss frame type may be provided on the beam member.

  In the example shown in FIG. 10B, the support frame 50 includes four sets of outer frame frame members 51 and an intermediate support frame member 52. The outer frame frame member 51 is provided with two frame members standing on the beam member 22 and having an upper end connected to the ring frame 12 provided on the mast M. These frame members are arranged in an inclined manner and in parallel with each other, and the separation width thereof is substantially the same as the width of the mast M. Further, the intermediate support frame member 52 has a shape in which two bar members that respectively connect the upper end portion of one frame member and the lower end portion of the other frame member in the outer frame frame member 51 cross each other. Is formed.

  These outer frame frame member 51 and intermediate support frame member 52 form the same surface to constitute a surface frame type. Also by using such a face frame type support frame 50, the mast M can be firmly held, so that the vibration suppression performance can be improved, and the collapse of the mast M can be suitably prevented. it can.

  Furthermore, as a surface frame type, it can also be set as the aspect shown to Fig.11 (a) (b). In the example shown in FIG. 11A, the support frame 60 includes four sets of outer frame frame members 61 and an intermediate support frame member 62. The outer frame frame member 61 is provided with two frame members which are erected on the beam member 22 and whose upper end portions are respectively connected to corners of the outer frame portion 18A of the upper reinforcing frame 18 provided on the mast M. Yes. These frame members are arranged vertically and are arranged in parallel to each other, and the separation width is wider than the width of the mast M. Further, the intermediate support frame member 62 has a shape in which two bar members connecting the upper end portion of one frame member and the lower end portion of the other frame member in the outer frame frame member 61 cross each other. Is formed. Such a face frame type can also be used.

  In the example shown in FIG. 11B, the support frame 70 includes four sets of outer frame frame members 71 and an intermediate support frame member 72. The outer frame frame member 71 includes two frame members that are erected on the beam member 22 and whose upper end portions are respectively connected to the corner portions of the ring frame 12 provided on the mast M. These frame members are arranged so as to be inclined, and are arranged so that the distance between them is widened downward. The separation width is substantially the same as the mast M at the top and the mast M at the lower part. It is wider than the width. Further, the intermediate support frame member 72 has a shape in which two bar members that respectively connect the upper end portion of one frame member and the lower end portion of the other frame member in the outer frame frame member 71 cross each other. Is formed. Such a face frame type can also be used.

It is a perspective view of the mast holding | maintenance apparatus of the tower crane which concerns on 1st embodiment of this invention. (A) is the plane of the mast holding | maintenance apparatus shown in FIG. 1, (b) is the side view. It is an effect | action figure explaining the vibration condition of a mast. It is a side view of the mast holding device concerning a modification. It is a side view of the mast holding | maintenance apparatus which concerns on another modification. (A)-(c) is a side view of the mast holding | maintenance apparatus which concerns on another modification. (A), (b) is a side view of the mast holding | maintenance apparatus which concerns on another modification. (A) is a side view of the mast holding device which concerns on 2nd embodiment of this invention, (b), (c) is a side view of the mast holding device which concerns on the modification. (A), (b) is a side view of the mast holding | maintenance apparatus which concerns on another modification. (A), (b) is a perspective view of the mast holding device concerning other modifications. (A), (b) is a perspective view of the mast holding device concerning other modifications.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10,30 ... Mast holding | maintenance apparatus 11, 31, 34, 40, 50, 60, 70 ... Support frame 12 ... Ring frame 13 ... Fitting member 14 ... Reinforcement frame 15 ... Base 16 ... Middle reinforcement frame 17 ... Upper stage support Frame 18 ... Upper reinforcing frame 18B ... Inner frame portion 18A ... Outer frame portion 20 ... Structure 21 ... Column member 22 ... Beam member 23 ... Seat 25, 26 ... Bracket C ... Cranes D1, D3, D4, D5, D6 ... Oil Damper D2 ... plastic damper M ... mast T ... tower crane

Claims (4)

A tower crane mast holding device comprising a support frame for connecting a mast of a tower crane and a structure on a plurality of floors provided surrounding the mast, and holding the mast by the support frame,
Each of the support frames is erected on the structure, arranged across the layers in the structure, and an upper end portion is attached to the mast, and the support frame restrains and supports horizontal movement of the mast. A mast holding device for a tower crane. A tower crane mast holding device comprising a support frame for connecting a mast of a tower crane and a structure on a plurality of floors provided surrounding the mast, and holding the mast by the support frame,
Each of the support frames is erected on the structure, arranged across the layers in the structure, and an upper end portion is attached to the mast. The support frame restrains and supports movement of the mast in the rotation direction. A mast holding device for a tower crane.   The tower crane mast holding device according to claim 1, wherein the support frame is attached to the mast via a horizontal damper that absorbs vibration in a horizontal direction.   The tower crane mast holding device according to any one of claims 1 to 3, wherein each of the support frames includes a frame body and a vertical damper that absorbs vibration in a vertical direction.

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