ES2374015B1 - CRANE TOWER CRANE. - Google Patents

Abstract

Tower crane without cusp, formed by a pen (1) and a counter-pen (2) that are joined directly to each other by the upper part, by means of a joint (11), while by the lower part said pen (1) and counter-pen ( 2) they are joined by joints (9) on the rotating platform (5) for mounting on the corresponding support tower.

Description

that help support part of one's weight and part

Tower crane without cusp.

Technical sector

The present invention is related to the lifting and movement of loads, proposing a tower crane made according to a structural formation without cusp, with which remarkable functional characteristics are achieved, as well as technical and economic advantages, compared to the solutions of conventional tower cranes . State of the art

Tower cranes are lifting devices of discontinuous operation, intended to lift and move, in space, suspended loads of a hook or any other means of attachment.

In said cranes, the hook or load securing element is suspended from a horizontal structure of the crane, called a boom, through a carriage that travels along said structure.

The pen is for its part an adjustable structural element, which is placed on top of another vertical structure called a tower.

The most common use of the aforementioned tower cranes is in construction sites, where the installation is temporary, so assemblies, disassembly and transfers are frequent.

The usual components of the complete structural assembly of a tower crane are: base, vertical tower, turntable, horizontal boom, backlight, counterweight, cusp, ballast, boom carriage and load securing element.

The base is the element that supports the vertical tower of the crane and the ballast is necessary to ensure stability. In the built-in cranes the base is formed by a concrete slab.

The tower is a vertical structure that rests on the base and on top of which the rotating part is arranged.

The turntable is an adjustable structure, which is located in the upper part of the tower, incorporating a rotating crown equipped with raceways, one located in the lower part called lower crowns and another in the upper part called upper crowns.

The boom is a structural component capable of supporting the loads that are handled with the crane.

The counter-pen is a structural component that is arranged in extension of the boom, incorporating in it the counterweight, which is a mass that has the function of counteracting part of the actions of the payload and some parts of the crane in operation.

The cusp is a structural element that integrates the rotating part of the crane, to support and transmit the efforts from the boom and the counter-pen.

The carriage of movement by the pen, involves the element of subjection of the loads, allowing the movement of these, along the pen.

The load securing element can be of different types depending on the loads to be moved with the crane, for example a hook, a spoon, an electromagnet, etc.

With this structural conception, two types of tower cranes are known, one that is called with braces, in which a cusp of considerable load is placed on the load transmitted by the boom and the counter-pen; and another that is called without braces, which also has a cusp, although small in size, without the incorporation of braces. Both types of crane employ cusp.

Object of the invention

In accordance with the invention, a tower crane made with a structural formation without cusp is proposed, determining an upper part of the crane simpler and simpler than that of conventional cranes with cusp, while simplifying the transmission of stresses to the structure of the rotating part of the crane.

This crane, object of the invention, comprises a rotating platform that directly joins the lower part of the boom and counter-pen structures directly through joints that are secured by means of corresponding bolts, while the upper part of said Feather and counter-pen structures are joined by means of a joint in which reinforced diagonals of the respective ends of those pen and counter-pen structures concur.

A structural arrangement is thus obtained in which the sturdy function of the cusp of conventional tower cranes is replaced by the reinforced diagonals that extend between the mounting joints at the ends of the boom and counter-pen structures.

This achieves a structural formation that simplifies assembly and disassembly, making the crane more simple and economical in its constructive and functional set, within equivalent resistance characteristics for the use of application in lifting and movement of loads. Description of the fi gures

Figure 1 shows in schematic representation a conventional tower crane with cusp and with braces.

Figure 2 is a schematic representation of a conventional tower crane with cusp and without braces.

Figure 3 is a detailed perspective view of the top of a conventional tower crane with a cusp.

Figure 4 is a detailed representation of the connection of the pen and the counter-pen on the rotating platform, according to the invention.

Figure 5 shows an enlarged perspective of the rotating platform of the crane of the invention.

Figure 6 is a perspective detail of the end of the crane boom for the mounting bracket according to the invention.

Figure 7 is a perspective detail of the end of the crane's back pen for the mounting bracket according to the invention. Detailed description of the invention

The object of the invention refers to a tower crane, which are commonly used in construction sites to lift and move loads, with performance characteristics that make it advantageous in the constructive and functional aspects.

Conventional cranes of this type consist, as shown in Figures 1 and 2, of a boom (1) and a counter-pen (2), which are arranged horizontally on a vertical tower structure (6), by means of a rotating platform (5 ), incorporating the structure

3 EN 2374015A1 4

The tower (6) supported on a support base (7), while the counterweight (2) incorporates a counterweight (4) to compensate the efforts transmitted by the boom (1) by its weight and that of the loads that They are suspended from it.

In extension of the upper part of the tower structure (6), a cusp (3) is attached to the rotating platform (5), on which the support of the pen (1) and the counter-pen (2) is established, said cusp (3) being able to terminate at the junction of the pen (1) and the counter-pen (2), such as the realization of Figure 2, or extended upwards, incorporating between it and the pen (1) and the counter-pen

(2) braces (8), such as the realization of the figure

one.

The crane object of the invention (Figures 4 to 7), is structured without cusp, joining the lower part of the boom structure (1) and the lower part of the structure of the counter-pen (2), directly on the upper crown holder (16) of the turntable (5), through some joints (9), in relation to which locks (10) are arranged that allow their securing.

On the other hand, the upper part of the structure of the pen (1) joins the upper part of the structure of the counter-pen (2) by means of a joint (11), in which reinforced diagonals conclude

(12) which are part of the mentioned structures of the pen (1) and the counter-pen (2), at the extreme front thereof, so that said reinforced diagonals (12) do, in this case, the resistant function necessary to support these structures of the boom (1) and the counter-pen (2) in the arrangement of the structural assembly of the crane.

To assemble, the lower part of the counter-pen (2) is first placed, by means of bolts (13) integral with that part, on the corresponding joints (9) of the rotating platform (5), closing the bolts ( 10) respective to secure these joints, and by means of an accessory tie rod (15) the upper part of said counter-pen structure (2) is attached on the other side of the rotating platform (5).

Once this is done, the upper part of the pen structure (1) is attached, with respect to the upper part of the back pen structure (2), by means of the articulation (11), and by swinging the pen (1) with rotation on the mentioned articulation (11), the lower part of the boom structure (1) is carried to the respective joints (9) on the rotating platform (5), in which fit is established by corresponding bolts (14) integral of that lower part of the structure of the pen (1), securing these joints (9) by closing in turn the corresponding bolts (10), whereby the entire structural assembly of the pen (1) and the counter-pen (2), is firmly attached to the turntable (5).

5 EN 2374015A1 6

Claims (5)

one.

Tower crane without a cusp, of the type comprising a boom (1) and a counter-pen (2) arranged horizontally on a vertical tower structure (6) mounted by means of a rotating platform (5), characterized in that the boom structures (1) and of the counter-pen (2) they are joined by the upper part directly to each other by means of an articulation (11), while by the lower part they are joined to the rotating platform (5), by means of corresponding bolts (13 and 14), on articulation joints (9) that has said rotating platform (5).

2.

Tower crane without cusp, according to the first claim, characterized in that the structures of the boom (1) and the counter-pen (2) incorporate

at the end of the connection between them reinforced diagonals (12), which determine the resistance necessary to withstand the efforts of the pen (1) and the counter-pen (2) on the joint.

3.

Tower crane without cusp, according to the first claim, characterized in that the counter-pen (2) has at the end of union with the boom (1), an accessory strap (15), for securing said counter-pen (2) in horizontal position during the assembly phase.

Four.

Tower crane without cusp, according to the first claim, characterized in that the joints (9) have bolts (10) that allow securing the fastening of the bolts (13 and 14) of the boom (1) and the counter-pen (2) ) in said joints (9).

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200900321 SPAIN Date of submission of the application: 05.02.2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: B66C23 / 62 (2006.01) RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

TO

EN 2264334 A1 (SAN MARCO INTERNAT S R L) 16.12.2006, 1-2

column 4, line 7 - column 5, line 14; figures 2.4.

TO

EP 1031531 A2 (MAN WOLFFKRAN) 30.08.2000, one

paragraphs [13-14,19]; Figures 1-2.5-6.

TO

GB 1217450 A (EDILMAC SPA) 31.12.1970, one

page 1, line 92 - page 2, line 31; figures.

TO

US 6213318 B1 (WALKER ROBERT J) 10.04.2001, 1.4

column 4, line 66 - column 6, line 37; Figures 2-4.8.

TO

US 5082128 A (FRANZEN HERMANN et al.) 21.01.1992, 1.4

column 6, line 62 - column 8, line 33; Figures 6-10.

TO

WO 2008006573 A1 (WOLFFKRAN GMBH et al.) 01.17.2008, one

pages 3-4; figures.

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 30.01.2012

Examiner J. Angoloti Benavides Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 200900321 Minimum documentation searched (classification system followed by classification symbols) B66C Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 200900321 Date of Written Opinion: 30.01.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1-4 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-4 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 200900321 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

ES 2264334 A1 (SAN MARCO INTERNAT S R L) 16.12.2006

D02

EP 1031531 A2 (MAN WOLFFKRAN) 30.08.2000

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The invention relates to a tower crane without a cusp, with a horizontal boom and counter-pen on a vertical tower, and comprising the joints by articulation defined in the first claim. Other dependent characteristics of the crane are specified in the dependent claims. Cranes without cusps of D01 and D02 are known. D01 offers a crane system without cusp, while disclosing two state-of-the-art cranes. Specifically, the second variant (column 4, lines 7-25; figure 2) corresponds to a crane without a cusp whose counter-feather (26) joins on its lower part to the rotating platform (21) by a joint (27), the boom (19) joins, also by its lower part, to the platform by a second joint (22). In its upper part, the pen and counter-feather are joined by nearby joints (24,29). However, the pen and the counter-pen do not join “directly with each other”, but through an element of the turntable (21), contrary to what is defined in claim 1 of the application under study. The variant of Figure 4 also differs from the one claimed in the same characteristic, since both the pen (9) and the counter-pen (10) are joined through the upper portion (8) of the rotating platform (6). D02 shows a second crane without cusp, in this case with the boom (13) moving also in the vertical direction. This crane has a counter-pen (15) so that at the bottom both elements are joined together in the joint (11), while at the top they are joined by two joints (25,27) to a hydraulic element (29 ) that moves the pen (13). This crane also does not comprise the characteristics of the first claim. No document, or obvious combination of documents, that sufficiently anticipates the independent claim has been found. Therefore, the application according to all claims seems to have novelty and inventive activity according to articles 6 and 8 of Patent Law 11/1986. State of the Art Report Page 4/4