JPH1171093A - Three-element type foldable support with folding/ unfolding device for tower type crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a support, which must hold a maximum height or given height in a work site, foldable within minimum external shape dimension or given transport external shape dimension. SOLUTION: A support 5 includes a lower support element 6 connected to a rotary chassis 3 of a crane, folding intermediate support element 7, and an upper support element 8 supporting a boom 13 of the crane. A folding/unfolding device of this support 5 includes at least one guide 23 connected to the rotary chassis 3 and the intermediate support element 7, cord 30 connecting the intermediate support element 7 to a king post of a boom 19, jack 27 set up between the rotary chassis 3 and the lower support element 6, and a drive means itself able to include a connecting rod assembly part 34 positioned in a level of the intermediate support element 7. The crane, during transport on a road, is folded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention generally relates to tower cranes that can be automatically folded and unfolded, especially to work sites.
And it relates to the field of tower cranes used to carry on the road from one site to another. The invention more particularly relates to such a crane column.

[0002] In the field of collapsible and extendable tower cranes, there are single element column cranes, telescopic column cranes, collapsible column cranes with several elements, and folding. It is classified as a movable and extendable column crane. The invention consists of a collapsible strut, i.e. at least two elements of the strut, which are connected one on top of the other for each joint, and also to facilitate the transportation of the crane on the road, It relates to a tower crane of the type having a column which can be folded to reduce the external dimensions of the column and which can be stored in a fairly horizontal position.

[0003] The problem generally imposed on cranes of this type is that the columns, which must have a maximum height or a given height at the work site, must be installed in a minimum or given transport size. Is to fold.

[0004] Collapsible post cranes are usually equipped with two post elements: a lower post element connected on the swiveling chassis of the crane and an upper post element connected to the apex of the lower post element. It has a foldable strut constructed. In particularly known embodiments (Patent Publication FR-A-26882096 or EP-A-
No. 0536061), the mechanization of the folding and unfolding of a two-element strut comprises a hydraulic jack connecting the lower strut element to the upper strut element with the aid of a connecting rod assembly, and a swivel chassis to the upper strut element. Assured by a device with a jack and connecting rod assembly, including a stand-up assembly guy connected to the base. Such an embodiment with two-element struts does not incompletely solve the problem of crane working height optimization for a given transport geometry. In addition, implementations that combine the extension and erecting of a column with given and fixed movements that may collide with pre-existing obstacles (walls, trees, wires, etc.) in some cases There are examples.

A crane with telescoping struts and folding telescoping struts provides an effective solution to this problem in strict kinematic planning, but the solution is very costly. The present invention aims to provide an economic solution to the problem of realizing a foldable tower crane with minimum dimensions for a maximum working height, the proposed solution being within the scope of foldable columns. It is in.

As a result, the present invention aims at a folding column for a tower crane composed of three components, the three components being: a lower column connected to the base of the rotating chassis of the crane; Elements: a relatively short length of collapsible intermediate strut element connected to the top of its lower strut element; and-Upper strut element connected to the base of the intermediate strut element and supporting the crane boom at its top. The strut itself, which is composed of three components, including a foldable / unfoldable device, comprises at least one guide connected at one end to the rotating chassis and at the other end to an intermediate strut element of the strut fold. -A string connected at one end to an intermediate strut element of the strut fold and at the other end to a king post supported by a boom;
And on the other hand each vertex has a connecting axis of the lower strut element on the rotating chassis, a connecting axis of the lower strut element and the intermediate supporting element, a connecting axis of the guy to the intermediate supporting element and a connecting axis of the guy to the rotating chassis. The lower deformable quadrilateral and, on the other hand, at each apex the connecting axis of the middle and upper strut elements, the connecting axis of the boom to the top of the upper strut element, and the connection of the aforementioned string to the king post of the boom It is constituted by a drive means which serves to deform the upper deformable quadrilateral with its axis and its connecting axis to the intermediate strut element.

[0007] The invention also folds into a particularly triangular shape, which is particularly compact for transport, whereas the three components are located in a substantially vertical position during operation, providing optimal operation. A foldable strut with three components forming the height is proposed. The strut has a folding / stretching device and also a folding / stretching device which is relatively simple and guarantees an upright standing on the mechanical principle of a double deformable quadrilateral. To define this shape clearly, the intermediate strut element advantageously presents a triangular appearance, the vertices of which are remote from the longitudinal axis of said intermediate strut element, the upper articulation point for the guy, and also for the strap. Serve as a lower joint point.

[0008] The drive means, which guarantees the folding and unfolding of this column with three elements, is simple and inexpensive, especially in the embodiment of the invention, which means: on the one hand, a rotating chassis at one end. A unique jack, the other end of which is connected to the lower strut element, and, on the other hand, a connecting rod assembly connected in a manner to be connected to the intermediate strut element, the upper part of the lower strut element and the lower part of the upper strut element. It is configured in combination.

The drive means also includes a unique jack, here directly commanding a pre-defined lower quadrilateral deformation, while the articulation caused by the lower quadrilateral deformation. The upper quadrilateral deforms in a synchronized manner by the action of the rod assembly itself. The three-component strut, which is the object of the present invention, also expands by continuous movement from the folded position during transport to the standing position during work, and the folding of the strut is unfolded by a completely opposite movement.

According to another embodiment of the invention, the driving means comprises: a first jack having one end connected to the rotating chassis and the other end connected to the lower support element; and one end connected to the intermediate support element. And a second jack connected at the other end to a longitudinal middle point of the upper support element.

The second jack here is in a manner independent of the lower quadrilateral, which makes it possible to change and adapt the folding space to avoid obstacles such as walls, trees, wires etc. , Allows the upper deformable quadrilateral to be deformed.

Regardless, the present invention refers to the accompanying drawings, which illustrate, by way of example, several embodiments of this collapsible post having three components with a folding / extending device for a tower crane. Will be easier to understand with the help of the detailed description shown below. The tower type crane shown in the drawing comprises a chassis 1 of a base supporting a rotating chassis 3 via a direction determining mechanism 2 and a collapsible column 5 connected to the rotating chassis 3 via a horizontal shaft 4. The folding strut 5 is composed of three components: a lower strut element 6, an intermediate strut element 7, and an upper strut element 8.

The lower strut element 6 is connected to the rotating chassis 3 via a horizontal shaft 4 by its base. A relatively short length of the intermediate strut element 7 is connected via its horizontal axis 9 by its base to the top of the lower strut element 6. The upper strut element 8 is connected via its horizontal axis 10 by its base to the top of the intermediate strut element 7. The three strut elements 6, 7 and 8 are constituted by trusses or caissons. The intermediate strut element 7 has a generally triangular shape when viewed from the side, the part 1 of the intermediate strut element remote from the longitudinal axis 12
1, extending laterally and rearward. The horizontal connecting shafts 4, 9 and 10 are completely parallel to each other.

The upper strut element 8 supports at its top a split crane boom 13 connected to the top of its upper strut element 8 via another horizontal axis 14 parallel to said horizontal axis. The boom 13 is also constituted by three successive elements designed as a leg boom 15, a boom folding intermediate element 16 and a tip boom 17, each connected to one another via a horizontal axis. At the base end of the leg boom 15 is connected via a horizontal axis 18 a rigid king post 19 of the crane which is tilted rearward of the crane in the working position. At one point 22.

Two parallel guys 23 are connected at one end to the rotating chassis 3 via a similar horizontal shaft 24. The other ends of the two guys 23 are connected to the rear part 11 of the intermediate support element 7 via a similar horizontal shaft 25. More particularly, the connecting axis 25 of the guy 23 is located near the top of the part 11 furthest from the longitudinal axis 12 of the intermediate strut element 7.

This structure forms a first deformable quadrilateral 26 whose four vertices are horizontal connecting shafts 4, 9,.
25 and 24.

A hydraulic jack 27 for driving is connected at one end to the rotating chassis 3 via a horizontal shaft 28. The other end of the jack 27 is connected to a longitudinal middle point 29 of the lower support element 6 via a horizontal axis.
For this lower strut element 6, the jack 27 is here located on the opposite side of the guy 23 so that it is located below said lower strut element in the folded position during transport. The action of the jack 27 commands a transformation of the preset quadrilateral 26.

A flexible cord 30 and a call string for holding the boom are connected at their lower ends to a rear part 11 of the intermediate strut element 7 via a horizontal shaft 31. More particularly, the connecting axis 31 of the string 30 is connected to the longitudinal axis 12 of the
It is provided at the top of the part 11 farthest from the top. The upper end of the brace restraining string 30 is the boom king post 19
At the top.

The upper strut element 8 carries a short auxiliary king post 32 in its upper part, in which a boom retaining strap 30 is suitable for assisting in certain phases of the folding / extending process.

The previously drawn structure forms a second deformable quadrilateral 33, the four vertices of which are connected to the horizontal connecting axis 1
0, 14, 21 and 31.

The deformation of the second quadrilateral 33 is commanded by means of a connecting rod assembly, which is shown in detail in FIG. The connecting rod assembly 34 comprises: an elbow-shaped lever 3 connected via a horizontal shaft 36 provided in the area of the elbow at the intermediate strut element 7.
5, a link 37 having one end connected via a horizontal axis 38 at a point at the top of the lower strut element 6 and the other end via a horizontal axis 39 at one arm of a lever 35 bent in an elbow shape. And-another end connected via a horizontal shaft 41 at a point at the bottom of the upper strut element 8 and the other end via a horizontal shaft 42 at the other arm of the elbow-shaped lever 35. A link 40 is provided.

The elbow-shaped lever 35 also
Its two ends are connected to two links 37 and 40, respectively. As a result, the lower support element 6 and the intermediate support element 7
Will result in a change corresponding to the angle formed by the intermediate strut element 7 and the upper strut element 8. In other words, the deformation of the first deformable quadrilateral 26 commanded by the jack 27 causes the deformation of the second deformable quadrilateral 33 by the direct intervention of the rod assembly 34.

The function of the whole apparatus for folding / unfolding the struts 5 is given by a predetermined one, and
1 to 4 show the successive phases of the crane folding, starting from the transport folding position shown in FIG.

In the example shown, the chassis of the base 1 of the crane is itself supported by a light truck deck 43. Similarly, in the transport position, the strut element 5
And the boom element 13 of the crane is folded over the deck 43 and partially onto the cab 44 of the light truck with crane.

More particularly, with regard to the strut 5 in the folded position during transport, the lower strut element 6 occupies a diagonal position which decreases towards the rear of the truck. The intermediate strut element 7 occupies a rather vertical position behind the truck. The upper strut element 8 occupies a fairly horizontal position from behind the truck to above the cab 44. The boom 13 is itself folded over the upper strut element 8 in a substantially horizontal position. Similarly, in the folded position during transportation, the jack 2
7 is shortened and occupies a place below the lower strut element 6, whereas the folded connecting rod assembly 34 occupies the space formed between the three strut components 6, 7 and 8.

In order to extend and spread the crane at the work site, the stabilizing device 45 descends to the ground and the jack 27
Acts in the direction in which the piston rod extends. The lower strut element 6 also rises gradually, also rotating about the horizontal axis 4, whereas the middle strut element 7 retains a rather vertical initial position, taking into account the union guaranteed by the guy 23. I do. Thanks to the connecting rod assembly 34, the upper strut element 8 also gradually rises from its initial horizontal position. FIG. 2 shows the shape of the crane, in particular the column 5 in an intermediate position after the start of the extension. In contrast, FIG. 3 shows the configuration of the crane in another intermediate position, rather near the final stage of spreading. Finally, FIG. 4 shows three strut elements 6, 7 and 8
Shows a fully extended crane reaching a fairly vertical position.

In short, the extension of the column 5 constituted by the three column elements 6, 7 and 8 depends on the principle of deformation of the two deformable quadrilaterals 26 and 33, in the folding position during transport shown in FIG. From the intermediate position (see FIGS. 2 and 3) to the extended position during the operation of FIG. In this case, the first quadrilateral 26 is directly deformed by the jack 27, whereas the second quadrilateral 33 is free of the connecting rod assembly 3 without any auxiliary energy source.
4, the connecting rod assembly 34 itself is driven by the deformation of the first quadrilateral 26.

At the same time, the extension and extension of the boom 13, which is not described here in detail, is carried out in the extension and extension of the column 5, which is implemented according to principles known per se. The column folding, which makes it possible to return the crane to its transport position, is unfolded by the jack 27 operating in the direction of the return of its piston rod, by the exact reverse process of the stretching described previously. .

FIG. 6 shows another embodiment of the present invention. In this case, the elements common to those already described are designed with the same respective reference numerals. In another embodiment, the connecting rod assembly is eliminated and the second hydraulic jack 46 is removed.
Has been replaced by One end of the jack 46 is connected via a horizontal shaft 47 on the part 11 of the intermediate strut element 7. The other end of the jack 46 is connected via a horizontal shaft 48 at a point in the longitudinal middle of the upper strut element 8 relatively close to the base of the upper strut element 8. In this alternative embodiment, the second jack 46 is, as described above, the first quadrilateral 2 commanded by the jack 27.
Command the transformation of the second quadrilateral 33 irrespective of the transformation of 6.

The two parallel guys 23 are replaced by just one guy or two guys with reinforcement, and in front of the lower strut element 6 (and below it in its folded position during transport). Instead of being located behind the lower strut element 6 (and above it in the folded position during transport), the position of the jack 27 can be changed and yet another possibility is a unique jack or its own. That the first jack 27 in the case is connected on an extension of the lower strut element extending beyond the connecting shaft 4 of the lower strut element 6 on the rotating chassis 3-the boom is not directly relevant to the invention and has already been described. And on a crane showing a different folding structure and mode from that shown, use a foldable brace composed of three elements, as already described. To it, - not on the track, directly axle or trailer, or a completely different transport systems, or wagon,
Applying the present invention to a crane installed for transport on something other than a container or the like does not depart from the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a side view of a tower crane having a column constituted by three components in a completely folded state during transportation according to the present invention.

FIG. 2 is a side view of the crane shown in FIG. 1 in an intermediate position at an early stage of stretching.

FIG. 3 is a side view of the crane in an intermediate position at a final stage of extension.

FIG. 4 is a side view of the crane in a fully extended state (during operation).

FIG. 5 is an enlarged scale drawing of the connecting rod assembly of the crane column folding apparatus shown in FIGS. 1 to 4;

FIG. 6 is a side view of a tower crane having a column composed of three components according to another embodiment of the present invention in the middle of stretching.

[Explanation of symbols]

 1. Base chassis 2. Direction determining mechanism 3. Rotating chassis 4. Horizontal axis 5. Foldable strut 6. Lower strut element 7. Middle strut element 8. Upper strut element 9. Horizontal axis 10. Horizontal axis 11. Part of intermediate strut element 12. 12. longitudinal axis of the intermediate strut element Boom 14. Horizontal axis 15. Leg boom 16. Intermediate boom 17. Top boom 18. Horizontal axis 19. King Post 20. String 21. Top of King Post 22. One point of leg boom 23. Guy 24. Horizontal axis 25. Horizontal axis 26. First deformable quadrangle 27. Hydraulic jack 28. Horizontal axis 29. Midpoint of lower strut element 30. String 31. Horizontal axis 32. Auxiliary king post 33. Second quadrilateral 34. Connecting rod assembly 35. Elbow-shaped lever Horizontal axis 37. Link 38. Horizontal axis 39. Horizontal axis 40. Link 41. Horizontal axis 42. Horizontal axis 43. Deck, platform 44. Driver's cab 45. Stabilizer 46. Second hydraulic jack 47. Horizontal axis 48. Horizontal axis

Claims (7)

[Claims] A lower column element (6) connected via a horizontal axis (4) on the rotating chassis (3) of the crane; a horizontal axis (9) at the top of the lower column element (6). A relatively short length of intermediate folding strut element (7), connected via a horizontal axis (1) to the base on that intermediate strut element (7).
0) and the crane boom (1
3) comprising three components (6, 7, 8) constituted by an upper support element (8) supporting at the top,-one end connected to the rotating chassis (3) via a horizontal shaft (24) At least one guy (23) having the other end connected via a horizontal axis (25) to an intermediate strut element (7) for folding the strut (5),-one end for folding the strut (5) at one end. It is connected to the element (7) via a horizontal axis (31) and the other end is a boom (1).
A string (30) connected via a horizontal axis (21) to a guy (19) supported by 3), and, on the one hand, a connecting axis of the lower strut element (6) on the rotating chassis (3) as a vertex. (4) connecting the lower support element (6) and the intermediate support element (7) to the connecting shaft (9), connecting the intermediate support element (7) to the connecting shaft (25) of the guy (23) and to the rotating chassis (3); A lower deformable quadrilateral (26) with a connecting axis (24) of the guy (23) and, on the other hand, a connecting axis (10) of the intermediate strut element (7) and the upper strut element (8) as vertices; The connecting shaft (14) of the boom (13) to the top of the upper strut element (8) and the connecting shaft (21) of the aforementioned string (30) to the king post (19) of the boom.
And a drive means (27, 34 or 46) which serves to deform the upper deformable quadrilateral (33) having its axis of connection (31) of its string (30) to the intermediate strut element (7).
A folding / stretching device including itself.
A foldable column for a tower crane, characterized by being constituted by three components (6, 7, 8). 2. The intermediate strut element (7) has a triangular appearance, the apex of said intermediate strut element (7) remote from the longitudinal axis (12) being a connection point for the guy (23) and also 2. A collapsible strut having components for a tower crane according to claim 1, wherein the collapsible strut serves as a lower connection point for the string (30). 3. A drive means for ensuring the folding and unfolding of a column with three components (6, 7, 8): on the one hand, at one end via a horizontal axis (28) to a rotating chassis (3). And the other end is connected to the lower support element (6).
A unique jack (27) connected via a horizontal axis (29) to the middle strut element (7), the upper part of the lower strut element (6) and the lower part of the upper strut element (8), on the other hand 3. The three components for a tower crane according to claim 1 or 2, characterized in that they consist of a combination of connecting rod assemblies (34) connected in such a way that they are connected to each other. A collapsible support. 4. A connecting rod assembly (34) comprising: an elbow-bent lever (35) connected to the intermediate strut element (7) via a horizontal axis (36) at a bend portion; One point on the upper part of the lower strut element (6) is connected via a horizontal shaft (38), and the other end is connected via a horizontal shaft (39) to one arm of a lever (35) bent in an elbow shape. A link (37), and-one end connected to a point on the lower part of the upper strut element (8) via a horizontal axis (41) and the other end connected to the other arm of an elbow-shaped bent lever (35). 4. A collapsible strut with three components for a tower crane according to claim 3, characterized by further links (40) connected via (42). 5. A drive means for ensuring the folding and unfolding of a column (5) having three components (6, 7, 8):-at one end via a horizontal axis (28) to a rotating chassis (3). And the other end is connected to the lower support element (6) by the horizontal shaft (2).
A first jack (27) connected via 9), and-the length of the upper support element (8) connected at one end to the intermediate support element (7) via a horizontal axis (47) and at the other end. 3. A collapsible unit having three components for a tower crane as claimed in claim 1 or 2, characterized in that it comprises a combination of a second jack (46) connected at an intermediate point in the direction. Prop. 6. A unique jack or, in that case, a first jack (27) is connected to a point in the middle of the length of the lower strut element (6), the jack (27) being connected to the lower strut element (6). 6. A collapsible column with three components for a tower crane according to claim 3, which is located forward or rearward. 7. A unique jack or, in that case, a first jack (27) is connected on the extension of the lower strut element (6) and beyond the connecting axis of the lower strut element (6) on the rotating chassis (3). A collapsible column having three components for a tower crane according to any one of claims 3 to 5, characterized in that it extends to the side.