JPH0710471A - Assembling method and equipment for boom of tower type crane - Google Patents

Abstract

PURPOSE: To assemble a boom of a tower crane by improving safety and shortening stationing using time of an assembly auxiliary device. CONSTITUTION: Boom elements 15, 16, 17, 18 are aligned and assembled with a brace 13 on the ground, and the brace 13 of a boom and occasionally a brace 111 of a boom 8 on the opposite side are lifted up and aligned by using an assembly auxiliary device 69 in assembling a distribution boom 7 of a tower crane and the assembled boom 8 on the opposite side to be used at a site of building construction and civil work. Thereafter, the braces 13, 111 lifted and aligned and the boom 7 or the boom 8 on the opposite side are lifted by using the same assembly auxiliary device 69, the boom is put on a surface of a mast head part 6, and consequently, free end parts 56, 122 of the braces 13, 111 are correctly temporarily fixed on a top part of the mast head part 6 so as to be directly fixed by a connecting shaft 14, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a boom of a tower crane and an apparatus for carrying out the method.
The invention finds particular use in the assembly of tower booms used in the field of building construction and civil engineering, the distribution booms and the associated opposite booms which make up the support of the counterweight.

[0002]

The distribution boom of such a crane generally has a symmetrical triangular cross section, the upper vertices of the triangles corresponding to the upper frame, while the two lower vertices are the trolleys for distributing loads on site. It corresponds to the lower frame that forms the running track of. This distribution boom is mainly composed of temporary retaining shafts arranged at the ends of the upper frame and the lower frame.
A boom element assembled and aligned with each other, composed of fixed braces formed of multiple parts assembled end-to-end by a temporary anchoring shaft mounted at right angles to the mid-plane of the boom , The front end of the brace is articulated at the height of the upper frame of the boom element by a temporary anchoring shaft, which is also mounted at a right angle to the midplane of the boom.

Assembly of such a boom is generally performed as follows. The distribution boom is assembled with the braces resting on the upper frame in the direction of the element at the base of the boom, aligned on the ground and then assembled with the aid of assembly aids such as mobile cranes. Equipped. At the end of lifting, the articulation at the base of the boom is applied to the front of the mast head or the axis of rotation and temporarily fastened.

According to the first method of operation, the boom is
Held in position by the assembly aid, a compound pulley is provided between the free end of the brace and its fixed point on the top of the mast head. Using a winch or pull-up cable, until you can make a bracing temporary stop on the top of the mast head,
You can approach the free rope of the compound pulley. The work of compound pulleys is carried out at high altitudes and requires one or several workers in difficult working conditions, especially in wind or other bad weather, while the assembly aids are stationed during this whole time. This equipment is generally rented at high cost.

According to yet another more subtle method of construction, an assembly aid is used to lift the boom and its braces around the articulation at the base of the boom,
The lift is raised until a temporary tack can be made between the free end of the brace waiting on the root element of the boom and the end of a sufficiently long sling waiting on the top of the mast head. Once tacked, the assembly aid is used to lower the boom until the braces are aligned and taut. Assembly of the opposite boom is done in a similar manner to assembly of the distribution boom and thus presents the same disadvantages.

[0006]

SUMMARY OF THE INVENTION The present invention provides a method for assembling a tower crane boom, and an apparatus for carrying out the method, which improves safety and reduces the parking time of the assembly aids. , Is intended to correct the inconveniences mentioned above.

[0007]

SUMMARY OF THE INVENTION Therefore, a method of assembling a boom for a tower crane according to the present invention comprises a first end which is articulated at one end with a boom element or the opposite boom, the other end being initially the free end. To assemble a distribution boom, and optionally an opposite boom, with a fixed brace adapted to be connected by tack to the top of the mast head of the crane, in order to assemble the elements of the boom with that brace. Aligning and assembling on the ground,-Raising the boom brace still on the ground, and possibly the opposite boom brace, so that
The free end of the brace is held high above the boom or on the opposite boom so that the free end of the brace is correctly handled for temporary tacking directly on the top of the mast head, Lifting and holding the bracing and boom or opposite boom assembly, aligned and held, -at the end of lifting, applying the boom or opposite boom to the face of the mast head, -the boom or opposite It consists in attaching the side booms to the lower part of the mast head, and-temporarily fastening the free ends of the braces of the boom or the opposite boom directly to the top of the mast head.

As will be readily appreciated, raising the brace first to a suitable height on the distribution boom or the opposite boom allows the free ends of this brace to be directly combined and therefore the current compound. With a shape that does not require a pulley device,
Allows the boom or opposite boom to be applied in front of the mast head. Assembly can be done quicker and easier, and therefore in safer conditions for the employee, and by having the assembly aids stationed for a reduced amount of time.

This assembly aid, such as a hydraulic mobile crane, involves lifting and aligning braces, booms or opposite booms that are still on the ground, and then the braces and booms or opposites that are lifted and aligned and retained. Advantageously, it is also used to lift the side boom assembly and apply it to the front of the mast head.

The device according to the invention for carrying out the method defined above comprises, on the one hand, a bracing fixation of the fixing point of the root element of the boom in the case of a distribution boom or of the opposite boom. Having at least one sling or sling set suitable for connecting to a point and being hung directly or indirectly on the hooks of the assembly aid, on the other hand, with the braces being lifted, aligned and held. It has suspending means, such as a balancing device, for lifting the distribution boom or the opposite boom assembly. Thus, traction is first applied to the braces to bring the braces to the raised position before the distribution boom or the opposite boom assembly is lifted and the distribution boom or the opposite boom is still resting on the ground.

According to a preferred embodiment of the method for assembling the distribution boom of a tower crane, said device comprises, in addition to at least one sling that connects the fixing point of the root element of the boom to the fixing point of the braces. One end is articulated to a fixed point of the brace, while the second end has a lifting bundle with supporting and guiding means for moving along the upper frame of the root element of the boom, Are further provided to stop the stack in the raised position and ensure temporary fastening to the frame in that position.

The second end of the lifting bundle moves along the upper frame of the element at the base of the boom so that when the bundle reaches the raised position it comes into contact with the bollard supported by said frame. Can support the running wheels. This bundle is lifted at the same time as the boom braces, and its rigidity ensures that the braces are held in a lifted and aligned position during the lifting of the distribution boom assembly and its application in front of the mast head. .

The distribution boom brace is made up of a plurality of parts in sequence, the length of each of which is such that during transport the parts of the brace are mounted on top of it and during assembly they are connected to each other by connecting connecting rods of the boom. Advantageously, it corresponds approximately to the length.

According to another characteristic of the device according to the invention used in the distribution boom of a tower crane, the device further comprises a boom lifting balance device with two fastenings to the upper frame of the distribution boom. Then, one of the fixing brackets supports the fixed-length connecting rod, and the other supports the length adjusting sling for correcting the inclination of the distribution boom.

According to a supplementary feature of the invention, a fixed length connecting rod and a length adjusting sling temporarily suspend the connecting rod and sling respectively on a fixing bracket in order to correct the lateral slope of the distribution boom. It is laterally positioned by thick washers located on either side of the shaft.

After performing the bracing and lifting of the bundle with the assembly aid, the balancer is used with the same assembly aid to lift the boom assembly and place it in front of the mast head. . This balancing device is always fixedly rested on the distribution boom in the area of the center of gravity of the device.

According to another embodiment of the device according to the invention, which is particularly well suited for the assembly of the opposite boom of a tower crane, the device is a midpoint assembly aid for assembling the opposite boom of a tower crane. A balancing device useful for hanging the device on a hook, and two sets of hanging ropes fixed to both ends of the balancing device and attached to opposite sides of the boom,
This sling has a rear sling that connects the balancing device to a fixed point on the frame of the opposite boom and a front sling consisting of two parts, one of the front sling lifting the balancing device in braces. Connect to the brace for
A brace is connected to a fixed point on the frame of the opposite boom for lifting the raised brace and opposite boom assembly.

Therefore, a single set consisting of a sling and a balancing device is here useful for lifting the opposite boom brace, and for lifting the raised brace and opposite boom assembly, the two tasks , One after the other directly without modifying the suspension points on the hooks of the assembly aids. According to another aspect of the present invention, the provisional fastening of the brace free end to the top of the mast head comprises:
This is preferably facilitated by the presence of holes at the brace free end on the side of the distribution boom and on the connecting connecting rod on the side of the opposite boom.

In any case, the present invention illustrates, by way of non-limiting example, a method for carrying out a method of assembling a boom of a tower crane and the accompanying drawings showing some embodiments of apparatus for carrying out the method. With reference, it will be further understood from the following description.

[0020]

DETAILED DESCRIPTION OF THE INVENTION The crane shown in FIG.
A fixed or rotary base frame 1 and a fixed shaft 3 for supporting a rotary shaft 5 on which a mast head 6 itself is mounted via a direction changing device 4.
It has a mast 2 on which the height can be adjusted. The crane comprises a distribution boom 7 and an opposite boom 8 with a counterweight, which is provided on each side of the device for assembly according to the invention.

The distribution boom 7 is provided with a trolley 9, a traveling mechanism 10 for the trolley 9, and an unloading winch 11 for handling luggage on the work site.
Alternatively, the rotary shaft 5 is attached to be connected around a horizontal axis, and is maintained in a substantially horizontal position via a brace 13 connected at 14 to the top of the mast head. This adjustable distribution boom 7 comprises a root element 15, one or more intermediate elements 16, a so-called brace attachment element 17 and one or more ordinary elements 18 located ahead of the brace attachment element. Have.

The braces 13 of the distribution boom 7 correspond substantially with the lengths of the elements of said distribution boom, more specifically the root element 15, the intermediate element 16 and the brace attachment elements 17 limited to the parts located below the braces. The plurality of portions 19, 20, and 21 having respective lengths are sequentially formed. As shown in FIGS. 2, 3 and 4, the different parts 19, 20, 21 of the brace 13 are arranged on the corresponding distribution boom element for transport.

Referring to FIG. 3, the middle portion 20 of the brace 13 is constituted by a long element 22 of circular cross section, the rear end of which is terminated by caps 23, the front of which is the line of the brace 13 and the central plane of the distribution boom 7. And a connecting rod 24 with a grip 25 which are joined together by a shaft 26 mounted at a right angle to form a tenon. In the transport position, the elongate element 22 comprises the front support 2 with the cords 29.
8 and the rear support 30 including the temporary retaining shaft 29,
It rests on the upper frame 27 of the intermediate element 16 of the corresponding boom, so that the long element is positioned on the temporary anchoring shaft, while the connecting rod 24 makes the upper frame 27
Is lowered to the front end of the.

As shown in FIG. 4, the front portion 21 of the brace 13 has a long element 3 of circular cross section, the rear portion of which is terminated by the tenon 33 at the front end and the cap 34 at the rear end.
2 and the front ends in a double hanger 35 which is joined together by a shaft 36 to form a cap. The double hoist 35 is further at the height of the gusset plate 38 forming a tenon by the shaft 39, at the boom brace attachment element 17.
Is assembled on the upper frame 37 of the. Axes 36 and 39
Are mounted at right angles to the lines of the brace 13 and the central plane of the distribution boom 7. In the transport position, the long element 32
Is rested on the upper frame 37 of the brace attachment element 17 of the distribution boom 7 by means of a rear support 40 with a tensioning shaft 41.

As shown in FIG. 2, the rear portion 19 of the brace 13 has two elongate elements 42, 43 of circular cross section mounted on extensions on either side through the support 44, The upper part of the part 44 receives a locking shaft 45 of a hanging rope 46 which serves for lifting the brace 13 of the distribution boom 7, while
Its lower part is mounted at a right angle to the line of the brace 13 and the central plane of the distribution boom 7 and serves at the same time for the assembly of the long elements 4, 43 and for the connection of the bundle 48 which also serves to lift the brace 13. Accept.

The two ends of the long element 42, 43 assembled on the shaft 47 form a tenon 49 and a cap 50, respectively, and when said two ends form an angle less than a flat angle, they are separated from each other by a support plate 51. Come into contact. Furthermore, the rear part 19 of the brace 13 has in front a connecting rod 52 with a grip 53, which forms an assembly tenon by means of a shaft 54 mounted at right angles to the lines of the brace 13 and the central plane of the distribution boom 7. The front end of the assembly of the two long elements 42, 43 then forms a cap 55. The rear end of the assembly of the two long elements 42, 43 forms a tenon 56 with an oval hole 57 for easily connecting 14 the brace 13 to the top of the head of the mast 6.

As shown in detail in FIG. 11, a bundle 48, which is connected at one end to the brace 13 by means of a shaft 47, has at the other end an upper frame 59 of circular section of the element 15 at the base of the boom. It is equipped with wheels 58 in the shape of an aerial sesame that can rotate above (see also FIG. 2). In the transport position, the bundle 48 is lowered anteriorly below the posterior portion 19 of the brace 13 and the assembly of the two elongate elements 42, 43 comprises a front support 60 with a tensioning or anchoring shaft 61, And the rear support 62 with the temporary retaining shaft 63 allows it to rest on the upper frame of the element 15 at the base of the boom, so that the bundle is positioned on the shaft, while the connecting rod 52 is connected to the frame 59. Is lowered to the front end of the.

Distributing boom 7 illustrated in FIGS. 5, 6 and 7.
The lifting and alignment of the brace 13 are performed as follows. Elements 15, 16 and 1 of fully equipped boom 7
7, 18 are lined up on the ground and assembled together. At that time, the portions 19, 20, 21 of the brace 13 are connected to the connecting rod 5
2 and 24 are respectively connected to the caps 23 and 34 for assembly by the braces and the shafts 64 and 65 mounted at right angles to the center plane of the distribution boom 7.

The distribution boom 7 thus equipped is raised on at least two pedestals 66, 67 which are sufficiently high for the trolleys 9 equipped to pass through. The cradle 66 is arranged in the rear part of the element 15 at the base of the boom, while the pedestal 67 is arranged in the front part of the boom 7 beyond the assembly axis of the brace 13 in order to avoid tilting of the boom 7 when lifting said brace 13. To be done. Using the hook 68 of the assembly assisting device 69 arranged on the boom shaft on the rear side of the boom 7, the free end portion of the lifting rope 46 suspended on the shaft 45 of the support portion 44 of the rear portion 19 of the brace 13 is moved. To be captured. The catching of the hanging rope 46 on the hook 68 is performed at the height of the ground. Then, as shown in FIG. 5, the hook 6 of the assembly assisting device 69.
8 is raised again until the sling 46 is tense.

By continuing to raise the hook 68, the portions of the brace 13 are gradually lifted up one after another, while the lifting bundle 48 suspended by the shaft 47 on the brace 13 by the action of its own weight causes the lifting bunch 48 to rise. It rises by rotating on the upper frame 59 of the root element 15 via wheels 58 (see FIG. 6).

During this operation, the double-fixed sling line 70, which connects the double-fixed point 71 located at the rear end of the boom root element 15 to the shaft 72 located at the top of the lifting bundle 48, is gradually increased. get nervous. At the end of the work, the double fixed lanyard 70 is tensioned and the brace 13 is made almost straight in the lifting position, while the lower end of the lifting bundle 48 has an upper frame 59.
The abutment of a shaft 73 integral with a support 74 fixed approximately in the center of the length of the boom root element 15 (see FIGS. 2 and 7). In this position, the lower end of the lifting bundle 48 is manually or automatically locked to the support 74 by the shaft 75.

Fully equipped boom 7 and brace 13
In order to pull up the assembly constituted by (1) to the raised position, a balancing device 76 as shown in FIG. 12 is used. The balance device 76 has two fixing brackets 77, 78 to the upper frame 79 of the boom 7. Each metal fitting 77, 78
It is formed by an upper stirrup 80 arranged on the joints 81, 82 of the structure of the boom 7 and two lower stirrups 83, 84 arranged on both sides of the joints 81, 82, respectively. To attach the lower stirrups 83 and 84 to the upper stirrup 80, screw 8
7, 88.

Rotation of the boom 7 around the upper frame 79,
The fixing of the fixing brackets 77, 78 is ensured by the shaft 85 engaged with the deformation preventing equipment 86 of the boom 7 passing through the lower stirrups 83, 84. Each upper stirrup 80 supports a shaft 89, 90 with a grip mounted at a right angle to the central plane of the boom 7 at a high portion. The fixing metal fitting 77 includes a fixed-length connecting rod 91 extended by the first lifting hanging rope 92,
Recapture by that axis. Washers of different thickness 93
Is a request from both sides of the shaft between the supporting parts,
7 and connecting rod 91.

On the other side, the fixture 78 recaptures the length adjustment sling 94 extended by the second lifting sling 95 by its shaft 90. Washers 96 of different thickness are also dispensed on demand from both sides of shaft 90. The length adjusting hanger 94 has an adjusting connecting rod 97 that is connected to the shaft 90 at one end, and its main body has a plurality of temporary retaining holes 98 and one temporary retaining hole 98 of the adjusting connecting rod 97. It has a part 99 which is axial at the end and, if necessary, an additional connecting rod 100 which is connected 101 at the other end of the part 99.

The tilt of the boom 7 is made correct by adjusting the length of the hanger 94, while its lateral slope is
It is modified by the distribution of washers 93 on either side of shafts 89 and 90. As a rule, adjustments are made once for all booms of a given length. A balancing device 76, which adjusts and lifts the fully-equipped boom 7 and brace 13 to the lifting position, is lifted up to the height of the mast head 6 by the assembly assisting device 69.
This task is shown in FIG.

As shown in FIGS. 9 and 10, the boom 7 thus lifted is illustrated as connecting the boom root element 15 to the front of the mast head 6. The connection is made by two shafts 12 connecting two gusset plates 102 forming the tenon of the rotary shaft 5 to a cap 103 extending rearwardly of a lower frame 104 of the boom root element 15. Inside the gusset plate 102, the angle-type guide device 105 is attached to the cap 103.
Ensures that the gusset plate 102 is pre-centered and the shaft 12 is easily positioned correctly.

Once the boom root element 15 is connected to the mast head 6, the free rear end of the brace 13 forming the tenon 56 appears near the top 106 of the mast head 6. A double sling 107 from the top 106 forms a cap provided for being associated with the tenon 56 (see also FIG. 14). The ladder 108 and the workbench 109 are provided by an assembler so that the connecting shaft 14 is placed in the correct position. Assembly of the brace 13 to the top 106 of the mast head 6 is facilitated by the lateral flexibility of the brace 13 and the elliptical hole 57 in the tenon 56.

From that side, the opposite boom 8, which is shown in detail in FIG. 13, is mounted at the same height as the distribution boom 7 on the mast head 6 or on the rear face of the rotary shaft 5 in an articulated manner at 110. And is held in a substantially horizontal position via the brace 111 connected to the top portion 106 of the mast head 6 at 138. Brace 111 is mounted symmetrically on both sides of opposite boom 8 and has two identical long elements 112 of circular cross section, the ends of which are terminated by caps 113, 114.
Composed of.

The rear cap 113 is assembled on the frame 115 at the height of the gusset plate 116 forming a tenon by the shaft 117. The front cap 114 is
Folded at the base 121 and the top 122 forming a tenon,
It is assembled by a shaft 118 to a connecting element 119 composed of two flat iron plates 120 connected by spacers 123 and 124. The connecting element 119 is connected to the long element 11 via the support plate 125 between the cap 114 and the tenon 121.
Hold on extension of 2.

The device for carrying out the method of assembling the opposite boom 8 has a balance device 126 whose midpoint 127 serves to lock the hook 68 of the assembly aid device 69 and which is connected to both ends 128 of the balance device 126. The two slings attached to both sides of the opposite boom 8 directly connect the ends 128 of the balancing device 126 to fixed points 130 located at the rear of the corresponding frame 115 of the opposite boom 8. Rear hanging rope 129 and two parts 131, 132
The first part 131 connects the end 128 of the balancer 126 to the fixed point 133 of the brace 111, and the second part 132 thereof connects the fixed point 134 of the brace 111 to the corresponding frame of the opposite boom 8. It has a front sling that connects to a fixed point 135 located at the front of 115.

The lifting of the brace 111 and the assembling of the opposite side boom 8 are performed as follows. The opposite boom 8 is assembled on the ground with the brace 111 lowered onto the frame 115. Using the hook 68 of the assembly aid 69, the midpoint 127 of the balancing device 126 is hung at ground level and then the hook 68 is gradually raised.

At the first time, the rear hanging rope 129 and the front hanging rope 131 are stretched, and the brace 111 is lifted this time until the front hanging rope 132 is stretched. At the next point in time, the opposite boom 8 with the brace 111 in the lifted position
Is lifted to the height of the mast head 6 by the assembly assisting device 69. The opposite boom 8 is then applied, as in the dispensing boom 7, to the mast head 6 or the rotary shaft 5.
It is attached to the rear surface at 110 and the brace 111 is attached to the shaft 13
8 to facilitate the assembly of the mast head 6 by means of a connecting rod 136 with an oval hole 137.
(See FIGS. 1 and 14).

If the present invention applies simultaneously to the distribution boom 7 and the opposite boom 8 of the same tower crane, the assembly of the opposite boom 8 is in principle carried out, and then the opposite boom 8 can be partly fitted. The counterweight is placed and then the distribution boom 7 is attached.

Needless to say, the present invention is the only way to carry out the method of the invention described above by way of example,
And the embodiment of the device for assembling the boom of a tower crane is not limited to it, but includes any variations of implementation and application based on the same principle. Thus, from the scope of the present invention, any constructive modifications, such as supporting the details of the braces 13 and 111, or the incorporation of any equivalent technique, such as replacing the wheels 58 sliding the upper frame 59 of the root element 15 of the boom with shoes. It does not move away. In the order of the same idea of methods, the order of certain operations can be modified without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is an overall view of a tower crane in an assembled state to which a method according to the present invention is applied.

FIG. 2 is a perspective view of the root element of the boom that carries the device useful for lifting and aligning the fixed braces for carrying out the method according to the invention, in the case of a distribution boom.

FIG. 3 is a perspective view of a boom intermediate element showing an arrangement of a portion of a brace corresponding to a carrying position.

FIG. 4 is a perspective view of a brace attachment element of a distribution boom.

FIG. 5 is a view showing a first state of lifting and aligning a brace of a boom.

FIG. 6 is a diagram showing a second state of the same.

FIG. 7 is a diagram showing a third state of the same.

FIG. 8 is a view showing a lifting operation of a distribution boom assembly having a raised brace.

FIG. 9 is a diagram showing details of the arrangement of a boom attached to the mast head.

FIG. 10 is a perspective view of the same.

FIG. 11 is a detailed perspective view of a bundle useful for lifting and aligning the braces of a distribution boom.

FIG. 12 is an overall perspective view of a balancing device useful for lifting a distribution boom assembly.

FIG. 13 is a general perspective view of an apparatus for carrying out the method according to the invention for the case of an opposite boom.

FIG. 14 is a detailed perspective view of a high portion of the mast head of the crane.

[Explanation of symbols]

2 Mast 3 Fixed shaft 5 Rotating shaft 6 Mast head 7 Distributing boom 8 Opposite boom 9 Truck 10 Truck traveling mechanism 11 Lifting winch 13, 111 Bracing 15 Element at the base of distributing boom 7 16 Same intermediate element 17 Same bracing mounting element 18 Same element 19 Rear part of brace 13 Same middle part 21 Same middle part 21 Same front part 22, 32, 42, 43, 112 Long element 23, 34, 50, 55, 103, 113, 114 Cap 24, 52, 91, 97 , 100, 136 connecting rod 25, 53 grip portion 26, 36, 39, 45, 47, 54, 64, 65, 7
2, 73, 75, 85, 117, 118, 138 Shaft 27, 37, 59, 79 Upper frame 28, 60 Front support part 29, 41, 61 Tension shaft 30, 40, 62 Rear support part 31, 63 Temporary retention Shaft 33, 49, 56 Mortise 35, 107 Double lifting device 38, 102, 106 Gusset plate 44, 74 Support portion 46 Hanging rope 48 Bundle (lifting bundle) 51, 125 Support plate 57, 137 Oval hole 58 Wheel 66, 67 Stand 68 Hook 69 Assembly auxiliary device 70 Double fixed hanging rope 71 Double fixed point 76, 126 Balance device 77, 78 Fixing metal fitting 80 Upper stirrup 81, 82 Coupling 83, 84 Lower stirrup 86 Deformation prevention equipment 87, 88 screw 89, 90 shaft with grip 92, 95 lifting hoisting rope 93, 95 washer 94 length adjusting hanger 104 lower frame 1 05 Guide device 106 Top of mast head 6 108 Ladder 109 Workbench 115 Frame 119 Connecting element 120 Flat iron plate 123, 124 Spacer 127 Middle point 128 of counterbalance device 126 Same end 129 Rear suspension rope 130, 133, 134, 135 Fixed Points 131, 132 Front noose

Claims (13)

[Claims] 1. One end is connected (at 39, 117) to one element (17) of the boom or to the opposite boom (8),
The other end, which is initially free, is the mast head of the tower (6)
Fixed braces (13, 1) provided to be connected by temporary fastening (at 14, 138) to the top (106) of the
In a method for assembling a boom of a tower crane, which comprises assembling a distribution boom (7) and optionally an opposite boom (8) with 11):-elements of the boom (15,16,17,18) Assembling with the braces (13) aligned on the ground, -the braces (13) of the boom (7) still on the ground, and optionally the braces (111) of the opposite boom (8).
Lift and align, resulting in braces (13, 11
The free end (56, 122) of 1) is the mast head (6)
The free end being positioned and held high above the boom (7) or the opposite boom (8) so that it can be handled correctly for temporary tacking directly on the top (106) of the. Brace (13,
111) and lifting the boom (7) or opposite boom (8) assembly, -at the end of lifting, bring the boom (7) or opposite boom (8) against the face of the mast head (6). Rigging, -attaching the boom (7) or the opposite boom (8) to the lower part (5) of the mast head (6) (at 12,110), and-the boom (7) or the opposite boom (8). 8) Brace (1
Boom of a tower crane, characterized in that the free ends (56, 122) of (3, 111) are temporarily tacked (at 14, 138) directly to the top (106) of the mast head (6). How to assemble. 2. An assembly aid (69), such as a mobile crane, is used, which assembly aid (69) is still on the ground brace (13, 111), boom (7) or opposite boom (7). 8) Lifting and aligning, then lifting and aligning and holding the braces (1
3. 111) and boom (7) or opposite boom (8) assembly for lifting and also for applying to the front of the mast head (6). The method for assembling the boom of the tower crane described. 3. The method is applied to the distribution boom (7) and the opposite boom (8) of the same tower crane, the opposite boom (8) is first assembled and then the distribution boom (8). 7. The method of assembling a boom of a tower crane according to claim 1, wherein the assembly of 7) is performed. 4. An apparatus for assembling a boom of a tower crane, which implements the method as claimed in claim 1, wherein the apparatus comprises, on the one hand, a boom in the case of a distribution boom (7). The fixed point (71) of the root element (15) or the fixed point (130, 135) of the opposite boom (8) is connected to the fixed point (47, 133, 13) of the brace (13, 111).
4) and hooks (6) of the auxiliary assembly device (69)
8) at least one sling (46, 70) or sling set (1) adapted to be suspended directly or indirectly
29, 131, 132) and, on the other hand, an assembly of lifted, aligned and retained brace (13, 111) and distribution boom (7) or opposite boom (8), which is lifted An apparatus for assembling a boom of a tower crane, characterized in that it has a hanging means such as (76, 126). 5. The device for assembling a distribution boom (7) of a tower crane comprises a boom root element (15).
Other than at least one hanging rope (70) connecting the fixed point (71) of the to the fixed point (47) of the brace (13),
Is connected to the fixed point (47) of the brace (13),
On the other hand, the second end has a lifting bundle (48) with supporting and guiding means for moving along the upper frame (59) of the element (15) at the base of the boom, the means (73, 7).
4, 75) are further provided to stop the bundle (48) in the raised position, in order to ensure a temporary fastening to the frame (59) in that position. Boom assembly device for the tower crane described. 6. The second end of the lifting bundle (48) moves along the upper frame (59) of the boom root element (15) to reach the position where the bundle (48) is raised. When this happens, the traveling wheels (58) come into contact with the bollards (73, 74) supported by the frame (59).
6. The boom assembly apparatus for a tower crane according to claim 5, wherein the boom assembly apparatus supports the boom. 7. The brace (13) of the distribution boom (7) is made up of a plurality of parts (19, 20, 21) in sequence, the length of each part being each part (19) of the brace (13) during transport. , 20, 21) mounted above and corresponding approximately to the length of the elements (15, 16, 17) of the boom which, when assembled, are connected to each other by a connecting connecting rod (24, 52). Or a tower crane boom assembling apparatus. 8. The device further comprises a boom lifting balancer (76) having two fastenings (77, 78) to the upper frame (79) of the distribution boom (7), the fastening of the fastenings One (77) carries a fixed length connecting rod (91) and the other (78) carries a length adjusting sling (94) to correct the tilt of the distribution boom (7). A boom assembly device for a tower crane according to any one of claims 5 to 7. 9. A fixed length connecting rod (91) and a length adjusting sling (94) are provided for each of the connecting rod (91) and sling (94) to correct the lateral slope of the distribution boom (7). 9. Thick washer (93, 96) arranged on both sides of the temporary retaining shaft (89, 90) to the fixing fitting (77, 78) for lateral positioning.
Boom assembly device for the tower crane described. 10. A length adjusting sling (94) is connected at one end to a temporary retaining shaft (90) of the sling (94) to a fixture (78), and the sling body has a plurality of temporary retaining hooks. A hole (98), a part (99) having the temporary retaining hole (98) of the adjusting connecting rod (97) as an axis at one end, and if necessary, temporarily fixed (at 101) to the other end of the part (99). Boom assembling device for tower cranes according to claim 8 or 9, characterized in that it has an additional connecting rod (100). 11. Fixing fittings (77, 78) are respectively formed of an upper stirrup (80) and two lower stirrup (83, 84) attached to the upper stirrup by screws (87, 88), respectively. Boom (7) Structure connection (81, 8)
Characterized in that the rotation is fixed by shafts (85) which are arranged on both sides of 2) and which are engaged with the deformation preventing equipment (86) of the boom (7) traversing the lower stirrups (83, 84). A boom crane assembling apparatus for a tower crane according to any one of claims 8 to 10. 12. Balancing device (22), in which the midpoint (127) serves to suspend an assembly aid (69) on a hook (68) for assembling an opposite boom (8) of a tower crane. 126) and two sets of hanging ropes (129, 131, 13) fixed to both ends (128) of the balancer (126) and mounted on opposite sides of the opposite boom (8).
2), wherein the sling attaches the balancing device (126) to the fixed point (13) of the frame (115) of the opposite boom (8).
0) and a front sling rope (129) connected to each other and a front sling rope composed of two parts (131, 132), and one of the front sling ropes (131) has a balancing device (12).
Brace (111) for lifting 6) Brace (111)
The other (132) to the raised brace (1
11) For lifting the assembly of the boom (8) on the opposite side,
Connect the brace (111) to the frame (1) of the opposite boom (8).
Boom assembly device for tower cranes according to claim 4, characterized in that it is connected to a fixed point (135) of 15). 13. The holes (57, 137) have a brace (1
3, 111) are provided to temporarily fasten the free ends (56, 122) of the mast head (6) to the top (106) of the mast head (6), said holes (57, 137) preferably being on the distribution boom (7). ) Side brace (13) free end (56) and opposite boom (8) side connecting connecting rod (136). Tower crane boom assembly equipment.