JPH01271396A - Climbing tower crane with expandable receiving beam and climbing thereof - Google Patents

Abstract

PURPOSE:To obtain an expandable receiving beam by sliding or rotating an expansion beam member so as to lengthen or shorten the length of the receiving beam than the interval between steel frame lateral beams by the action of hydraulic cylinders. CONSTITUTION:For climbing, a nut 42 is removed, an ornamental hairpin metal 14 and a receiving metal 13 are removed from a bolt 41 to cut off the connection between steel frame lateral beams 03 and extension members 5 and 8. Hydraulic cylinders 7 and 9 are operated, the left extension beam member 5 is rotated and located in the shortened state, the horizontal beam member 8a of the right extension member 8 is retracted into a right beam member 3, the right extension beam member 8 is located in the shortened state, thus a receiving beam 1 is shortened shorter than the interval between the steel frame lateral beams 03 and 03. The receiving beam 1 is climbed upward in this state, the hydraulic cylinders 7 and 9 are operated, on the contrary to the above, the left extension beam member 5 and the right extension beam member 8 are set in the extended state respectively, respective support sections 5d and 8d are fixed to the lateral beams 03 and 03 with the bolt 41 and the nut 42 via unloaded holes 14a and 13b of the ornamental hairpin metal 14 and the receiving metal 13.

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a climbing tower crane equipped with an extendable support beam and a climbing method therefor. This makes it easy to connect with steel cross beams and adjust the length of the support beams.

Conventional Technology As a climbing method for tower cranes in the construction of high-rise buildings, a floor climbing method is used for boat fishing. The current methods include (a) a method in which the mount and support beam are separated during climbing to allow the mount to climb, and (b) both ends of the support beam can be expanded and contracted to change the length of the support beam. When climbing, there is a method in which the spacing between the support beams is made shorter than the distance between the steel transverse beams, and the pedestal and the support beams are climbed as one unit.

Problems to be Solved by the Invention In the method (a) above, in order to separate the frame and the support beam,
Method (b) has the drawback that it requires two sets of support beams and requires a lot of labor and work time.

Since the pedestal and support beam are climbed together as one unit, there is no need to separate or connect the pedestal and support beam, but it is necessary to change the length of the support beam and set the length. The disadvantage is that it takes a lot of man-hours and work time to fix the supporting beams to the steel transverse beams.

The problem to be solved by this invention is to provide a climbing tower crane that does not have the above disadvantages while adopting the method (b) above.In other words, it is easy to extend and contract both ends of the support beam with a simple operation. To provide a climbing tower crane equipped with an extendable support beam, which can easily adapt to a desired length of the support beam, and also facilitate attachment and detachment of the support beam to a steel cross beam, and a climbing method thereof. There is a particular thing.

Means for Solving the Problems The means for solving the problems of the invention of this application, that is, the configuration is such that a frame for fixing the base of a mast of a tower crane is removably fixed to a plurality of support beams, and consists of a main beam member and extension beam members at both ends of the main beam member, the extension beam members are attached to both ends of the main beam member so as to be able to slide or rotate, and there is a hydraulic cylinder connected at one end to the main beam member. The end of the support beam is connected to an extension beam member, and the length of the support beam is extended by actuation of a hydraulic cylinder to be longer than the spacing between the steel transverse beams, and shorter than the spacing between the steel transverse beams (reduced shortened condition). The extension beam member is made to slide or rotate so that the support beam is always in an extended state and the extension beam member portion is removably connected to the steel cross beam to allow the tower crane to climb. At this time, the connection between the extension beam member of the support beam and the steel cross beam is cut, and the support beam is brought into the shortened state by the operation of a hydraulic cylinder, so that climbing can be performed with the support beam and the frame connected. There is a climbing tower crane.

The structure of another invention of this application is to extend the extension beam members at both ends of the main beam members of the paired support beams, and extend the extension beam members at both ends of each support beam onto the 91 pairs of steel transverse beams. [1] A pair of support beams are removably connected to the steel transverse beams at a predetermined distance, a frame is removably fixed to the coupled pair of support beams, and the base of the mast is attached to the frame. is removably fixed,
A crane is removably fixed to the top of this mast, and the crane performs lifting work when climbing.
In a tower crane climbing method, the connection between the support beam and the steel cross beam is cut, the extension beam members at both ends of the main beam member of the support beam are shortened, and the tower crane is climbed while the support beam and the frame are connected. Fix a bracket with a hole for a bolt to the upper surface of the steel cross beam on which the extension beam members at both ends of the support beam are placed in an extended state, and then attach the extension beam members at both ends of the support beam that is in an extended state. Place the lower surface on the surface of the bracket, and place a metal fitting with holes for bolts on the upper surface of the extension beam member, insert the bolts into the holes in the metal support and the metal fitting, and attach the extension member with nuts. A climbing method for a climbing tower crane that is removably connected to a steel cross beam.

The main beam members of the above-mentioned support beams, that is, the support beam parts other than the extension beam members, are constructed by removably connecting two or more beam members, and the length of the main beam members is equal to the spacing between the steel transverse beams. In order to correspond, the number of beam members to be connected and any one of them
When configuring a main beam member by combining 63 beam members that are adjusted by changing the length of the book, use the azimuth 1- beam member (several beam members with different lengths) as the central beam member. When used, it becomes easy to change the length of the main beam member of the support beam.

The extension beam member can be placed at the end of the main beam member in such a way that the extension beam member can be slid in the longitudinal direction horizontally relative to the main beam member (horizontal sliding type). , an arrangement that allows the extension beam member to freely rotate along a horizontal plane about an axis perpendicular to the main beam member (horizontal folding type), and an arrangement that allows the extension beam member to freely rotate along a horizontal plane about an axis perpendicular to the main beam member, and There is an arrangement (vertical folding type) that allows the device to rotate freely along a vertical plane around a horizontal axis. As embodiments of the arrangement of the extension beam members at both ends of the main beam member, there are cases in which the same arrangement is adopted in one support beam, and cases in which different arrangements are adopted in combination.

It is preferable that the beam member constituting the main beam member of the support beam be constructed of a box-structured member, and it is also preferable that the extension beam member that constitutes a part of the support beam be constructed of a box-structured member.

When the extension beam member is disposed on the main beam member so as to be slidable in its longitudinal direction, the sliding portion should have a double box structure. Furthermore, it is preferable to use beam members and extension beam members with reinforcing ribs provided inside or outside of them.

For example, as a hydraulic unit for operating the hydraulic cylinder that is the driver of the extension beam member of the support beam, a system is adopted in which one hydraulic unit moves two hydraulic cylinders, and the two hydraulic cylinders are connected to the support beam. In contrast, a total of two hydraulic units and four hydraulic cylinders will be used. The hydraulic unit can be operated using a push button switch (for example,
It is best to adopt a system that can be remotely controlled by a person (4-point switching of off, extension, and retraction).

When manufacturing steel frame cross beams, it is possible to fix the steel frame by welding, etc., a bracket with holes for bolts to the part corresponding to the upper surface of the steel frame cross beam on which the extension beam member of the support beam will rest. It becomes easier to fix the support beam (extension beam member) to the cross beam.

In addition, brackets l~ are provided approximately horizontally by welding, etc., on both sides of the support beam corresponding to the top surface of the main beam member of the support beam on which the lower surface of the support part of the stand rests, and these brackets are used to fix the stand. If a support beam is constructed by drilling a hole through which a bolt passes through, there is no need for a metal fitting attached to the lower part of the support beam, which was used in the conventional method.

Operation The climbing tower crane of the present invention can automatically extend or contract the length of the support beam by sliding or rotating the extension beam member of the support beam by operating a hydraulic cylinder.

Further, in the climbing method of the present invention, a bracket having a hole for passing through the pole is fixed by front welding or the like to the upper surface of the steel cross beam on which the extension beam member of the support beam is placed. The extension beam member can be removably connected to the steel transverse beam simply by placing the extension beam member on the metal support and placing the metal fittings on the upper surface of the extension beam member.

Embodiment 1 A first embodiment of the present invention will be described using FIG. 11 and FIG. 2.

A building 01 under construction is composed of a steel column 02 and a steel cross beam 03 fixed to the steel column 02.

A support beam 1 is fixed on a steel cross beam 03, a pedestal 10 is supported by the support beam IJ:, and the pedestal 10 supports a base 30 of a mast of a tower crane.

The support beam 1 is composed of a main support beam member and an extension support beam member. The main support beam member is constructed by connecting a left beam portion +42 and a right beam member 3 with a joint member 4. A left extension member 5 is pivotally supported on the left end of the left beam member 2 by a vertical shaft 6, and a right extension member 8 is slidably fitted to the right side of the right beam member 3, thereby forming a receiving beam 1.

The left beam member 2 and the right beam member 3 are box-structured beam members, with the right end 2a of the left beam member 2 and the left end 3a of the right beam member 3.
and are removably connected using joint members 4 such as splints 4a and 4b and bolts and nuts.

The left end 2b of the left beam member 2 has a small back and defines a vertical shaft hole 2C. A bracket 2d that supports the hydraulic cylinder 7 is fixed to the lower surface of the left beam member 2 by welding or the like. Support part lid of cross member 11 of pedestal 10
11 brackets 2e are fixed approximately horizontally by welding or the like to both sides of the upper surface of the left beam member 2 on which the lower surfaces 1 and 1e of the left beam member 2 are placed.

Each bracket 2e is provided with a hole 2g.

The left extension beam member 5 includes a U-shaped pivot portion 5a, 5b-6c that receives the left end 2b of the beam member 2, and a support portion 5d, and the support portion 5d is a receiving member fixed to the steel cross beam 03. 13
It has a lower surface 5e that comes into contact with the upper surface 13a and an upper surface 5f on which the metal fitting 14 is placed. Said pivot portion 5a
, 5c are each provided with a vertical shaft hole 5g on the same axis. The shaft hole 2c of the beam member 2 and the shaft hole 5 of the extension beam member 5
A vertical shaft 6 is inserted into g, and the left extension beam member 5 is rotatably supported on the left beam member 2.

A bracket 5h is fixed by welding or the like to a portion of the lower part 5C of the U-shaped pivot portion that is remote from the center of the shaft hole 5g.

Then, one end 7a of the hydraulic cylinder 7 is attached to the bracket 2d.
and connect the other end 7b of the hydraulic cylinder 7 to the bracket 5.
Connect to h. Then, by the operation of the hydraulic cylinder 7, the left extension beam member 5 is brought into the extended state shown by the solid line in FIG.
It is possible to rotate approximately 90' between the shortened state shown by the two-dot chain line in the figure.

The right beam member 3 having a box structure has an opening 3c at its right end 3b.
A bracket l-3d is attached to the inside of the left side thereof, and a guide member 3e for guiding the right extension member 8 is attached to the inside of the right side. Cross member 1 of frame 1o
The left beam member 3 on which the lower surface 11e of the support portion lid of No. 1 is placed
Brackets 3f are fixed approximately horizontally on both sides (front and back) of the upper surface by welding or the like, and each bracket 3f is provided with a hole 3g.

From the opening 3C at the right end 3b of the right beam member 3 having a box structure,
The horizontal portions 8 and a of the right extension beam member 8 having a box structure are fitted together and guided to move horizontally by the guide member 3e.

A bracket 8c is fixed to the left end surface 8b of the horizontal portion 8a of the right extension beam member 8, and a support portion 8d is provided on the right side of the horizontal portion 8a of the right extension beam member 8. It has a lower surface 8e that rests on the upper surface 13a of the metal support 13 fixed to the cross beam 03, and an upper surface 8f on which the metal fitting 1.4 is placed.

A hydraulic cylinder 〇 is arranged in the right beam member 3 of the box structure, and one end 9a of the hydraulic cylinder 9 is connected to the bracket 1-3d.
and connect the other end 9b of the hydraulic cylinder 9 to the bracket 8.
c, and the right extension beam member 8 is shown in an extended state when the rod 9C of the hydraulic cylinder 9 shown in FIGS. The member 8 can be horizontally moved between the shortened state and the shortened state.

Frame 10 supporting the base 30 of the mast of a tower crane
is composed of four cross members 11 and four connecting members 12. Each cross member 11 has a U-shaped mast receiving portion 11 that receives a receiving portion 30a of the mast base 30.
a, llb, 11-ρ, and a support portion lid that rests on two sides of the receiving beam 1.

Support part 1.1 d is the bottom surface 1 that rests on the top surface of the support beam],
e, and an upper surface on which the Kanzashi hardware 15 is placed], ], and f. Each cross member 11. The frame 10 is constructed by connecting the inner sides of the two with connecting members 12 and the like.

Shaft holes located on the same axis are formed in the U-shaped upper and lower parts 11a and 11C of the mast receiver, respectively.

and forming a shaft hole in the receiving part 30a of the base 30 of the mass 1-,
The base 30 of the mast is removably fixed to the pedestal 10 by passing the fixing shaft 45 through these shaft holes.

A bracket]-3 having a plurality of bolt holes 13b at both ends is placed in advance on the upper surface of the steel frame cross beam 03, which the lower surface of the extension beam member 5.8 of the extended beam supports].
For example, during the manufacture of steel support beams), they are fixed by welding, etc.

Extended beam member 5.8 of [Support beam] and bracket of steel cross beam 03] 3
For the removable connection between the support part lid of the cross member 11 of the frame 10 and the support beam 1,
Use Kanzashi hardware 14.15. Kanzashi hardware 14.1
5, the metal holder 13 or the bracket 2e;
, 3f are provided with a plurality of bolt through holes 14a, 15a at positions corresponding to the bolt through holes 13b, 2g, 3g, respectively.

Step plates 16a, 16b, 16C11, 6 are installed around the pedestal 10.
d is attached to create a landing 16 that will serve as a work stage. Install handrails around the landing 16. Treadboards 16a, 16c
Hydraulic units 21 and 22 are disposed on the top, and a control panel 23 is disposed on the footboard 16d.

The hydraulic cylinder 7.9, the hydraulic unit 21.22, and the control panel 23 are connected to each other by hydraulic piping or the like, and the control panel 23
By pressing the push button of the hydraulic cylinder 7.9
, and position the extension beam member 5.8 in an extended state so that the length L of the support beam 1 is longer than the interval L□ between the steel cross beams, or the length L of the support beam 1 is The extension beam member 5.8 can be placed in a shortened state so that the distance L1 between the extension beam members 5.8 is shorter than the distance L1 between the extension beam members 5.8 and 5.8. Note that 46 and 47 are lids that close the openings on the side surfaces of the box-structured beam members 5.8, and are removably fixed to the side surfaces of the beam members.

Next, how to use the climbing tower crane of this first embodiment will be explained.

The lower surface 5C58e of the end of the extension beam member 5.8 of each support beam 1.1 in the extended state is placed on the upper surface 13a of each support member 13 fixed in advance to the steel cross beam 03, and the extension beam member 5.
Place the metal fittings 14 on the upper surfaces 5f and 8f of the support parts 5d and 8d of 8, pass the bolts 41 through the holes 14a of the metal fittings 4 and the holes 1-3b of the metal fittings 13, and tighten the nuts 42.
Connect the support parts 5d and 8d of the extension beam member 5.8 to the steel cross beam 03.
Fixed to.

On the pair of support beams 1, 1 fixed to the steel transverse beam 03, the support portions 11d of each cross member 11 of the pedestal 10 are placed on two sides of the support beam 1, and the inside of each cross member 11 is connected to the connecting member 12, respectively. etc. to form a frame 10, and support beams 1,
Place the lower surface of the support part 11d of the cross member at the position corresponding to the brackets 2e and 3f of No. 1, place the Kanzaki hardware 15 on the upper surface 11f of each support part lid, and place the support part 15a of the Kanzashi hardware 15 and the support beam. 1 bracket 1
- Pass bolt 43 through holes 2g and 3g of 28.3f,
Each cross member 11 is fixed to the support beam 1 with a nut 44.

The base 30 of the mast is fixed to the U-shaped mast receivers 11a, llb, llc of the cross member 11 of the mount 1o on the mount 1 with the fixed shaft 45, and a crane is attached to the top of the mast. Complete the installation.

While extending the mast according to the height of the building under construction,
Perform lifting work.

Next, I will explain how to climb.

When the mast is fully extended, the bell support beam (the support beam for the elevating frame at -) is fixed to the steel cross beam on the top floor of the building under construction, and the bell support beam is fixed to the top of mass 1-. After fixing (temporarily holding) the lowering of the mass 1-1 frame 1-0, the support beam 1, etc. with this bell support beam, remove the oak 1-42 from the bolt 41, is pulled out to break the connection between the steel cross beam 03 and the extension beam member 5.8.

Then, by pressing the push button (retract) on the control panel 23, the hydraulic cylinder 7.9 is activated, and the left extension beam member 5 is rotated in the direction of the arrow in FIG. At the same time, the horizontal beam member 8a of the right extension beam member 8 is retracted into the right beam member 3, and the right extension beam member 8 is positioned in the shortened state. , this support beam 1 is in a shortened state (the length of the support beam 1 is reduced to be shorter than the interval L1 between the steel cross beams 03.03)
Reduce the mast while keeping the mount 10, support beam 1, etc. connected to the base 30 of the mast.
Control sound 2 when the first class beam is being climbed (raised) to the top of the steel cross beam on the upper floor of the building under construction.
Press the push button 3 (extension) to release the hydraulic cylinder 7.8.
is activated to rotate the left extension beam member 5 from the shortened state shown by the two-dot chain line in FIG. Then, the right extension beam member 8 is horizontally moved to an extended state. This support beam 1 is in the extended state (the length of the support beam 1 is the steel transverse beam o3.03
(distance in between, extended to a distance greater than 1)
Finely adjust the length of the mast at the bottom of the bell support beam so that the lower surfaces 5e and 8e of the extension beam member 5.8 rest on the upper surface of the support 13], 3a, and Each support beam 1.1. The lower surfaces 5e and 8e of the support parts 5d and 8d of the extension beam members 5.8 are placed on the upper surface 13a of each bracket 13 fixed to the steel cross beam 03 in front, and the upper surface of the support parts 5d and 8d is Place the Kanzashi hardware 14 on 5f and 8f, and open the hole 14a of the Kanzashi hardware 14 and the hole 13b of the receiver 13.
The bolt 41 is passed through, the supporting parts 5d and 8d are removably fixed to the steel cross beam 03 with nuts 42, the bell support beam is removed from the mast, and the climbing work is completed.

In this first embodiment, one extension beam member 5 is of the horizontal folding type and the other extension beam member 8 is of the horizontal sliding type, but both extension beam members 5.8 are of the horizontal sliding type or horizontal folding type. It's good as well.

Example 2 In the second example, the left and right extension beam members 55 and 58 of the support beam 51 are
This system employs a vertically foldable extension beam member that rotates and folds along a vertical plane about a horizontal axis.

A second embodiment will be explained using FIGS. 3 and 4.

Descriptions of points common to the first embodiment will be omitted.

The support beam 51 is composed of a main beam member and left and right extension beam members. The main beam member is constructed by connecting a left beam member 52 and a right beam member 53 with a joint member 54.

A horizontal shaft 56 is attached to the outer end of the left beam member 52 and the right beam member 53.
The left and right extension beam members 55 and 58 are pivotally supported.

Since the left extension beam member 55 and the right extension beam member 58 have exactly the same configuration, the second embodiment will be mainly described with reference to the configuration and operation of the left beam member 52 provided with the left extension beam member 55.

The left and right beam members 52 and 53 are composed of box-structured beam members, with the right end 52a of the left beam member 52 and the left end 53 of the right beam member 53.
A are removably connected to each other using joint members 54 such as splints 54a and 54b and bolts and nuts.

The left end portion 52b of the left beam member 52 is slightly narrow,
Brackets 52f that protrude diagonally upward are formed on both sides of the upper part, and brackets 52g that protrude diagonally downward are formed on both sides of the lower part. A shaft hole 5211 is formed on the same horizontal axis of each upper bracket 52f, and a shaft hole 52j is formed on the same horizontal axis of each lower bracket 1-52g. A bracket 52d that supports the hydraulic cylinder 57 is fixed to the lower part of the left beam member 52 by welding or the like. Brassino of left beam member 52 1.52. A rack guide member 52k is attached to the upper part inside f.

The left extension beam member 55 is configured as a box-structured beam member, and on both sides of the inside of the left extension beam member 55, an interval slightly wider than the interval between the brush lines of the beam members 52 is maintained, Brassino h55 each protruding inwardly
Shaft holes 55h are formed on the same horizontal axis of the upper part 55b of each bracket 55a, and shaft holes 55j are formed on the same horizontal axis of the lower part 55c of each bracket 55a.
form.

The outer side of the left extension beam member 55 is the support portion 55d, and the support portion 5
5d includes a lower surface 55e that rests on the upper surface 03a of the steel cross beam 03, and an upper surface 55f on which the metal fittings 514 are mounted.

Then, the shaft hole 521 of the bracket 52f of the left beam member 52
1 and the upper part 5 of the left extension beam member 55 Brassinot 55 a
Insert the horizontal shaft 5G into the shaft hole 55h of the left extension beam member 55, and insert the key into the groove of the shaft hole 55l of the left extension beam member 55 and the groove of the horizontal shaft 56 to lock them together. 52 and the shaft hole 55j of the lower part 55c of the left extension beam member 55, and connect the left beam member 52 and the left extension beam member 55. .

One end 57a of the hydraulic cylinder 57 is
The other end 57b of the hydraulic cylinder 57 is connected to the rack 5.
7c, and the rack 57c is connected to the lower end of the rack guide member 5.
2 to guide it so that it can move up and down.

A gear 56a is fixed to the outer end of the horizontal shaft 5G, and a gear 56b rotatably supported by a shaft 56e is interposed between the gear 56a and the rack 57c to direct the vertical movement of the rack 57c to the horizontal shaft 56. Be able to convey the message.

The rack 57c is moved to 6 by the operation of the hydraulic cylinder 57.
L is moved downward, the shaft 56 is rotated via the gears 561) and 56a, and the left extension beam member 55 keyed to the shaft 5G is rotated. That is, the distance between the extended state of the left extension beam member 55 shown by the solid line in FIG. 3 and the shortened state shown by the two-dot chain line is 490.
'Rotate.

Next, how to use the climbing tower crane of this second embodiment will be explained.

Place the support beam 51 in the extended state shown by the solid line in FIG. 3, place the lower surface 55e of the support portion 55d of the left extension beam member 55 on the upper surface 03a of the steel cross beam 03, and place the metal fittings 514 on the upper surface 55f. , the upper surface of the metal fittings 513 is applied to the lower surface 03b of the steel cross beam 03. Kanzashi hardware above and below!
Pass the bolt 541 through the hole of 514.513, and connect the support part 55d of the extension beam member 55.58 with the nut to the steel cross beam o3.
It is removably fixed to the

Instead of using the above-mentioned metal fittings 513, if a receiving metal fitting is fixed to the upper surface of the steel cross beam 03 in advance by welding or the like as in the first embodiment, the work of fixing the receiving beam 51 to the steel cross beam 03 is facilitated. Become.

Note that the other installation work is the same as that of the first embodiment, so the explanation thereof will be omitted.

Next, I will explain how to climb.

After fixing the lowering of the frame 10, the bell support beam 51, etc. with the bell support beam fixed to the top of the mast,
Remove the nuts and bolts 541 that were fixing 4,513 from them, and remove the steel cross beam 03 and extension beam member 55.58.
break the bond with Then, after pulling out the leveling rod 59 inserted into the shaft hole 52j of each beam member 52 and the shaft hole 55j of the lower part 55c of the left extension beam member 55, press the push button (retraction) ti- on the control panel. The hydraulic cylinder 57 is operated, and the extension beam members 55 and 58 change from the extended state shown by the solid line in FIG. 3 to the shortened state shown by the two-dot chain line in FIG. I&90
° Rotate. While maintaining the support beam 51 in a shortened state (the length of the support beam 51 is reduced to be smaller than the interval L between the steel cross beams 03.03), the length of the mast is reduced, and the frame 1o, The support beams 51 and the like are climbed (lifted) to above the steel cross beams 03 on the upper floor of the building under construction.

In this state, press the push button (extension) on the control panel to operate the hydraulic cylinder 57 and move the extension beam member 55.58 to the third
It is rotated from the shortened state shown by the two-point M line in the figure to the extended state shown by the solid line. This support beam 51 is maintained in an extended state, and the horizontal stopper rod 59 is inserted into the shaft hole 52j of the bracket 52g of each beam member 52 and the shaft hole 55j of the lower part 55C of each extension member 55, Bottom of outer end and each extension +455
and the lower part of the inner end.

and the lower surface 55e of the extension beam member 55.58.

Finely adjust the length of the mast at the bottom of the bell support beam so that 58e rests on the top surface 0:3a of the steel cross beam 03. Each support beam 51.
The lower surfaces 55 e of the support parts 55 d and 58 d of the extension beam members 55 and 58 of 51 are placed on the −L surface 03 a of the steel cross beam 03
Pass the bolts 541 through the holes in the metal fittings 51.1 placed on the upper surfaces 55f, 58f of the support parts 55d, 58d and the metal fittings 513 placed on the lower surface 03a of the steel cross beam 03, and then tighten the extension beam members 55.58 with nuts. Support part 55 (1,
58d is fixed to the steel cross beam 03, the bell support beam is removed from the square 1-, and the climbing work is completed.

In this second embodiment, both extension beam members 55 and 58 are of the vertical folding type, but one of the extension beam members 58 may be of the horizontal sliding type.

In addition, in the first example and the second example, the main beam member (
The left beam member and the right beam member are removably connected to the joint 1 using a member as the supporting beam part (other than the extension beam member), but depending on the building being constructed, the steel cross beam
Since the spacing 1 between the steel frame cross beams 03 of the building changes, if the length L2 of the main beam members is configured to be easily changed, it will be easy to respond to changes in the spacing between the steel cross beams 03 of the building. I can do it,
Very convenient.

In the support beam shown in FIG. 5, the main beam members 101 of the support beam other than the extension beam members 1, 07, and 108 are composed of a left beam member 102, an adjustable beam member 104 in the center, and a right beam member 103, and each beam The members are removably connected by joint members 105 and 106, and if several beam members of different lengths are prepared as the adjusting beam member 104, by replacing this adjusting beam member ]-04. 5 steel cross beam 03
It can easily accommodate changes in the spacing between the two.

Effects of the Invention The climbing tower crane of the present invention can automatically expand and contract the length of the support beam by sliding or rotating the extension beam member of the support beam by operating a hydraulic cylinder. Expansion and contraction can be performed easily and in a short time.

In the climbing method of the present invention, a bracket with a hole for a bolt is fixed by front welding or the like to the upper surface of the steel cross beam on which the extension beam member of the support beam will be placed.
The extension beam member can be fixed to the steel cross beam by simply placing the extension beam member on top of the support and placing the metal fittings on the upper surface of the extension beam member, so instead of attaching the metal fittings to the bottom of the steel cross beam, which was done in the conventional method. This eliminates the need for the laborious work of attaching support beams, making it extremely easy to removably connect support beams to steel cross beams.

In addition, on both sides of the support beam corresponding to the top surface of the support beam on which the lower surface of the support part of the mount rests, brackets with holes for passing bolts for fixing the mount are bored, and the brackets are fixed approximately horizontally by welding or the like. The use of beams eliminates the time-consuming work of applying metal fittings to the lower part of the support beams, which was done in the conventional method, and facilitates the work of removably connecting the frame to the support beams.

If the main beam member of the receiving beam is constructed by removably connecting two or more beam members, and an adjusting beam member (several beam members with different lengths) is used as one of the beam members, the receiving beam will be It becomes easy to change the length of the main beam member of the beam.

This invention can significantly reduce the working time and labor man-hours required for climbing, and also makes climbing work easier and greatly reduces the risk of the work.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the climbing tower crane of the invention of this application, FIG. 1 is a partially sectional front view of the first embodiment, and FIG. 2 is shown in FIG. 1. 3 is a partially sectional front view of the second embodiment, FIG. 4 is a plan view of the structure shown in FIG. 3, and FIG. 5 is a plan view of another embodiment of the support beam. FIG. 3 is a front view of an example. , In the figure, 01 is a building under construction, 02 is a steel column, 03 is a steel cross beam, 1 and 51. are support beams, 2 and 52 are left beam members, 3 and 53 are right beam members, 2e and 3f are brackets, 4.54, 105 and ]06 are joint members,
1.04 is an adjustment beam member, 5.8.55.58.
107 and 108 are extension beam members, 6 is a vertical axis, 56 is a horizontal axis, 7.9 and 57 are hydraulic cylinders, 10 is a frame, 11 is a cross member, 12 is a connecting member, 13 is a bracket, 14.15. 513 and 514 are Kanzashi hardware, ], 6 is a landing, 21 and 22 are hydraulic units, 2
3 is the control panel, 30 is the base of the mast, 41.43 and 5
4] is bolt, 42 and 44 are oak! -, 4, and 5 are fixed axes. Patent applicant: Takenaka Corporation

Claims (1)

[Claims] 1. A frame for fixing the base of the mast of a tower crane is detachably fixed to a plurality of support beams, and the support beams are composed of a main beam member and extension beam members at both ends, An extension beam member is attached to both ends of the beam member so as to be able to slide or rotate, and a hydraulic cylinder whose one end is connected to the main beam member is connected to the extension beam member at the other end, and the length of the support beam is adjusted by the operation of the hydraulic cylinder. The extension beam member is made to slide or rotate so that the extension beam member is in an extended state in which it is extended longer than the spacing between the steel transverse beams and in a contracted state in which it is reduced to be shorter than the spacing between the steel transverse beams. When the support beam is in an extended state and is removably connected to the steel cross beam at its extension beam member, when climbing the tower crane, the connection between the support beam extension beam member and the steel crossbeam is disconnected, and hydraulic pressure is applied. A climbing tower crane equipped with an extendable support beam, characterized in that the support beam is brought into the shortened state by actuation of a cylinder, and climbing can be performed with the frame and the support beam connected. 2. The climbing tower crane equipped with an extendable support beam according to claim 1, wherein the main beam member is a support beam constructed by detachably connecting two or more beam members to each other. 3. Stretch the extension beam members at both ends of the main beam members of a pair of support beams, place the extension beam members at both ends of each support beam on a pair of steel transverse beams, and connect the pair of support beams. The mast is removably connected to the steel cross beams at a predetermined interval, a pedestal is removably fixed to the connected pair of support beams, the base of the mast is removably fixed to the pedestal, and the mast is attached to the top of the mast. When the crane is detachably fixed and the crane is used for lifting work and climbing, the connection between the support beam and the steel transverse beam is broken and the extension beam members at both ends of the main beam member of the support beam are shortened. In a tower crane climbing method in which the support beam and trestle are climbed while connected, a support with holes for bolts is installed on the upper surface of the steel cross beam on which the extension beam members at both ends of the support beam are placed in the extended state. After fixing the hardware, place the lower surface of the extension beam member of the receiving beam in an extended state on the upper surface of the supporter, and place a metal fitting with a hole for a bolt on the upper surface of the extension beam member, A climbing method for a climbing tower crane equipped with an extendable support beam, characterized in that an extension beam member is removably connected to a steel cross beam by passing a bolt through a hole in a support and a nut. 4. Stretch the extension beam members at both ends of the main beam members of the pair of support beams, place the extension beam members at both ends of each support beam on the pair of steel transverse beams, and connect the pair of support beams. The mast is removably connected to the steel cross beams at a predetermined interval, a pedestal is removably fixed to the connected pair of support beams, the base of the mast is removably fixed to the pedestal, and the mast is attached to the top of the mast. When the crane is removably fixed and the crane is used for lifting work and climbing, the connection between the support beam and the steel cross beam is cut, and the extension beam members at both ends of the main beam member of the support beam are shortened. In a tower crane support beam that is climbed with the support beam and pedestal connected together, brackets are protruded approximately horizontally on both sides of the support beam corresponding to the top surface of the support beam that the lower surface of the support part of the pedestal touches. An expandable support beam characterized in that each bracket is provided with a hole through which a bolt for fixing the frame is passed.