JP5013630B2 - Telescopic crane - Google Patents

Abstract

A jib is fitted with one or more bracing supports (2) tilted towards a rocking level that link to a tension device (6,7) running along the jib. The bracing support's angle of tilt is selected in such a way that the lateral load having an impact on the jib is taken up partially or completely by bracing.

Description

[0001]
BACKGROUND OF THE INVENTION
According to the concept of claim 1 of the present invention, the present invention comprises a lower chassis (Unterwagen), an upper chassis (Oberwagen) pivotably disposed on the lower chassis, a counterweight, and a jib. It is related to a telescopic crane.
[0002]
[Prior art]
The telescopic crane is applied with a load having a different magnitude according to each adjustment angle in the extended state. In steeply inclined positions, the side deformation of the main jib is often a criterion for the support load limit. In the case of the horizontal or middle adjustment angle, the load generated at the fulcrum of the extended telescopic part (Teleskopschuesse) is an important criterion for determining the maximum support load. For the case where the maximum support load is applied, a so-called superlift operation has been developed as a bending moment balance.
[0003]
Telescopic cranes with super-lift operation have been known for a long time (Excerpt of Mannesmann Demag Foerdertechnik company guide: Demag AC 1600; April 1996, pages 5, 17, and 27 reference). In order to increase the supporting load and reduce the deflection of the main jib that has been fed out, the main body (Grundkasten) of the main jib is equipped with a removable cable stand (Abspannbock) on the basic body. Connected to the leg area of the main jib with an almost invariable tensioning (Abspannung) and on the other hand to one head or collar of the internal telescopic extension / retraction with another tensioning, usually a variable length Has been. This reinforcing arrangement can only be used for the basic device, but can also be used in combination with the arrangement of a rigid or retractable auxiliary jib formed from the support tower.
[0004]
[Problems to be solved by the invention]
The object of the present invention is to present a telescopic crane in which the lateral deformation of the jib of the telescopic crane is significantly less than in the case of known telescopic cranes, especially at steeply inclined positions.
[0005]
[Means for Solving the Problems]
This problem is solved in combination with the characterizing part of claim 1 starting from the conception. Preferred embodiments are the subject matter of the dependent claims.
[0006]
In accordance with the teachings of the present invention, the jib is provided with at least one tension support that is inclined with respect to the retracting surface and is connected to a tensioning means that essentially extends in the longitudinal direction of the jib. In this case, the inclination of the tension wire support is selected so that the side load acting on the jib is partially or fully absorbed by the tension wire fixing. The tension wire support can be inclined obliquely or longitudinally with respect to the longitudinal direction of the jib, or can be inclined obliquely with respect to the longitudinal direction and double in the longitudinal direction.
[0007]
Preferably, two inclined wire support members are provided on the upper side of each jib member, and the inclination angles of the two wire support members are usually equal. However, the inclination angle may vary depending on the direction of the force acting on the jib. The leg ends of the both-strand support can be connected to the upper side of the jib at a common location, but can also be offset from each other. According to another feature of the invention, the leg ends of the at least one tensioning support are connected to the jib in the transition region between the upper side and each side wall. Alternatively, the leg ends of the at least one tensioning support may be placed on a support that traverses the jib longitudinal axis and projects over the jib.
[0008]
This proposed arrangement has the advantage that the component of the tension force (Abspannkraft) effective in the lateral direction can be changed steplessly or continuously depending on the respective angular position of the tension support. . In the case of the arrangement of the two tensioned wire supports arranged in a shifted manner, this means that, in the first extreme state, i.e. in the vertical position, the two tensioned wire supports parallel to each other perform the same action as the known tension wire frame. In the sense of lifting operation, it means having. The angular position for the tensioned wire support is from 0 ° to 90 °, and the effective tension (Spannkraft) is divided into a super-lift maneuvering component and a side tension wire fixing component. In the second extreme state, i.e. in the horizontal position, the stretched wire support provides only one reinforcement in the direction of both sides.
[0009]
Each free head end of the tension wire support is selectively connected via a first tensioning means to a lower chassis, an upper chassis, a jib leg region, a fixed or independently guided counterweight, or It is connected to the bottom in the direction of the leg end of the jib and is connected to the selected jib location in the direction of the jib head via another tensioning means. Each desired angular position of the wire support can be adjusted stepwise or continuously via swiveling of the wire support. Thereby, an asymmetric angular position is also possible. This means that, in the case of a side force acting only on one side, each tension wire support is inclined more in the direction in which the tension wire is fixed to the side, whereas the second tension wire support remains in an intermediate state. Means that.
[0010]
Since the spacing of the jib tensioning means also affects the desired reinforcement, it is intended to change the length of the tensioning means stepwise or continuously. The tensioning means can be formed as a rope or rod. The tensioning means can be arranged with or without initial stress (Vorspannung). In the case of initial stress and post-adjustable stress, the tensioning means works with a tensioning device (Spannvorrichtung). This is preferably a hoisting device or a piston / cylinder unit. However, the angle adjustment and / or length change of the wire support can also be used in the sense of a tensioning device. This tensioning device can optionally be placed on a wire support, jib, upper or lower chassis, or counterweight.
[0011]
Preferably, the tension support is arranged in the main jib in the region of the basic vehicle body, in particular in the front region between the connection of the retracting cylinder and the front bearing (vorderern Lagerung). For continuous adjustment of the wire support, each wire support is preferably connected to a piston-cylinder unit supported on the basic vehicle body. For the arrangement of the hoisting device, according to another feature of the invention, the tensioning support can have two cross beams, between which the hoisting device can be arranged.
[0012]
The mounting of the telescopic jib can be further reinforced by the placement of a rigid or retractable auxiliary jib formed from a support tower. The proposed side tension wire fixing can also be attached to this jib member.
[0013]
If the crane is equipped with measuring means for detecting lateral deformation of the jib, it is possible to use side tensioning particularly effectively. If this deformation exceeds a certain tolerance, the tensioning means connected to the tensioning is activated and the tensioning is re-tensioned. The degree of side deformation can be calculated directly or indirectly via the crane dimensions. For example, this is rope tension, rope length and rope elongation. However, it is also possible to express the degree of side deformation through the wind generated on the side, the sunlight, and the force acting on the jib in the form of the temperature dominant on the jib.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Other features, advantages and details of the invention will be apparent from the description of the embodiments illustrated in the following drawings.
[0015]
1A to 1C schematically show possible arrangements of the wire support inclined with respect to the lead-in surface. The tension wire support 2 is preferably arranged on the upper side 3 of the jib member 1 represented in this case by the reference numeral. The jib member 1 may be a basic vehicle body or an advancing / retreating portion of a main jib of a telescopic crane or a supporting tower member of a rigid or retractable auxiliary jib. The center axis 4 marked on the jib member 1 is also the jib retracting surface in an ideal case. According to the present invention, the wire support 2 is inclined at an angle α> 0 with respect to the drawing surface. The broken line display of the tension wire support 2 ′ reveals that the tension wire support 2 can be inclined toward the other side. The free end 5 of the tension wire support 2 is connected to the tensioning means 6, 7, preferably to a rope. The connection of the tensioning means 6 and 7 with a tensioning device such as a fixing point or a piston-cylinder-unit or hoisting device arranged on the jib is not shown here. However, the tensioning of the tensioning means 6, 7 can be achieved without a tensioning device. One is a system in which the tensioning means 6 and 7 are arranged at a smaller or larger angle α, and the tension wire support 2 is further tilted thereby. Or it is also possible to form the tension | tensile_strength support tool 2 in an expansion-contraction system, and to achieve a tension degree by the change of length.
[0016]
Partial view B shows the possibility of inclining the wire support 2 on the other surface at an angle β> 0. Partial view C shows the possibility of tilting the wire support 2 in both planes.
[0017]
In FIG. 2, the arrangement of the two tension wire supports 2.1, 2.2 is shown schematically in the same manner. A special feature of this arrangement is that both tensioning supports 2.1, 2.2 are arranged on the upper side 3 of the jib member 1 by a single leg end 8. Each inclination angle α1, α2 can be equal or different.
[0018]
The partial arrangements A to D of FIG. 3 also illustrate schematically the possibility of the arrangement of two tensioning supports 2.1, 2.2, which are separated leg ends 8.1, 8. 2 In the first partial view A, there are leg ends 8.1, 8.2 in the upper 3 region of the jib member 1, whereas in the partial view B, the transition from the upper 3 to the respective side walls 9, 9 '. In the region there are leg ends 8.1, 8.2.
[0019]
Part C shows the possibility of arranging at least one leg end 8.1 on the outside of the jib member 1. For this purpose, a support 10 extending rightward is arranged on the upper side 3, and at its end is a leg end 8.1 of a tension support 2.1 which is inclined rightward here. In the partial view D, the support 11 protrudes on both sides, so that both leg ends 8.1, 8.2 of the tensioned wire supports 2.1, 2.2 are outside the jib member 1.
[0020]
The special case is shown in FIG. Here, the transverse support 12 itself forms both tensioned supports extending to the right and left. This special form can therefore be deduced on the idea if both inclination angles α1 and α2 are increased to 90 ° in FIG.
[0021]
FIG. 5 shows a practical example in a front view and a side view. In this example, the jib member is the basic vehicle body 13 of the main jib of the telescopic crane. In parallel with the upper side 14 of the basic vehicle body 13, a frame base 15 is disposed so as to be able to turn, and is connected to the basic vehicle body 13 via fixing eye plates 16, 16 ′. On the lower support 17 of the frame base 15, tension wire supports 18.1 and 18.2 that can be inclined with respect to the side surface in the respective end regions are arranged. The possibility of continuous tilting is effected by means of piston-cylinder units 20.1, 20.2 which are arranged on the respective tensioning supports 18.1, 18.2 and the upper support 19 of the frame base 15. The figure shown here shows that the tensioner support 18.1 placed on the right stands vertically so that it is comparable to the tensioner frame, while the tensioner support 18.2 on the left has a special position with the maximum tiltable position. This case is shown. Each wire support 18.1, 18.2 has two cross beams 21.1, 21.2, 22.1, 22.2, which are substantially parallel in the lower region and slightly in the upper region. Extend close to each other. The connection between the two cross beams is carried out via the lateral reinforcements 23.1, 23.2. The transverse girders 22.1, 22.2 located inside each have smooth joints 24.1, 24.2 at the end on the leg side. The lateral girders 21.1, 21.2 located outside each reach the device in the upper region of the side walls 25, 25 'of the basic vehicle body 13 at the maximum inclination of the tensioning supports 18.1, 18.2. The respective locking positions (Anschlagstelle) at the side walls 25, 25 'are reinforced by the thin plates 26, 26'. Between the transverse girders 21.1, 22.1, 21.2, 22.2, hoisting devices 27.1, 27.2 are arranged in the lower region of the respective tension wire supports 18.1, 18.2. Has been.
[0022]
As already mentioned above, the frame pedestal 15 is arranged so as to be pivotable, so that the tension wire supports 18.1 and 18.2 can be removed in parallel with the upper side 14 of the basic body 13 for transporting the telescopic crane. Is possible. Each piston-cylinder unit 28.1, 28.2 is provided as a mounting aid (Ruesthilfe) in order to stand upright again, which is connected to the side wall 25 at one end and to each other at the other end. It is arranged in a half area of 18.1.
[0023]
The tensioning means, one rope 29.1 each, is fixed at one end to the head region of the tension wire support 18.1 via the rope thimble 31.1. From there, via a guide roller 30.1 extending to a turning point (Umlenkpunkt: not shown here) arranged in the jib head direction and arranged in the head region of the tension wire support 18.1 Return to and from there to the hoisting device 27.1.
[0024]
An abspannspange 32.1 is arranged on the rear side of the head region of the wire support 18.1 and represents the rear safety device for each wire support 18.1.
[Brief description of the drawings]
FIGS. 1A to 1C are schematic diagrams showing possible arrangements of tensioned wire supports inclined with respect to a retracting surface. FIGS.
FIG. 2 is a schematic diagram showing the arrangement of two slanted wire supports with common leg ends.
FIGS. 3A to 3D are schematic diagrams illustrating possible arrangements of two slanted wire supports with separate leg ends. FIGS.
FIG. 4 is a schematic view showing an arrangement of a tension wire support tool positioned obliquely.
FIG. 5A is a front view showing a practical embodiment including two tiltable tension wire supports, and B is a side view of FIG. 5A.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Jib member 2, 2 'Tension wire support 3 Upper side of jib member 4 Centerline of drawing-in surface 5 Free end 6, 7 of tension wire support Tensioning means 8 Leg end 9, 9' Side wall 10, 11 of jib member , 12 Support 13 Basic vehicle body 14 Upper side 15 of the basic vehicle body Frame frame 16, 16 'Fixing plate 17 Lower frame frame support 18.1, 18.2 Tension wire support 19 Upper frame frame support 20. 1,20.2 Piston-cylinder-unit (side adjustment)
21.1, 21.2 Outer cross beam 22.1, 22.2 Inner cross beam 23.1, 23.2 Transverse reinforcement 24.1, 24.2 Tension line support slide 25, 25 ' Side walls 26, 26 'of the basic vehicle body Reinforcement thin plates 27.1, 27.2 Hoisting devices 28.1, 28.2 Piston-cylinder units 29.1, 29.2 Tensioning means 30.1, 30.2 Guide rollers 31.1, 31.2 Rope thimble 32.1, 32.2 Tension wire fixing rod

Claims (27)

A lower chassis and an upper chassis which is pivotally arranged on the lower chassis, and counterweight, jib and, at least the main jib having a base of the jib, pull and feeding possible within the main jib in telescopic crane even without less of and a single telescopic retractable section,
The jib is configured to be inclined with respect to a retracting surface along a perpendicular line (4) extending perpendicularly to a mounting plane of the tension support (2) of the jib through a central portion in the width direction of the cross section of the jib. And at least one tension wire support (2) is disposed on the jib,
Said tension wire support (2) is connected to tensioning means (6, 7) arranged substantially along the longitudinal direction of said jib,
And wherein the load that acting on the side surface of the jib so as to absorb some or all the Korean mounting structure, a structure in which the inclination of the tension wire support (2) Ru is selected Telescopic crane to do. Even without least is inclined operatively configured with respect to the pull face the clad wire support (2) has at least one disposed on the upper side (3) of the jib (1), according to claim 1 Telescopic crane. The angle α of the at least one tension wire support (2) inclined in the width direction of the jib with respect to the perpendicular (4) and the angle inclined in the longitudinal direction of the jib with respect to the perpendicular (4) The telescopic crane according to claim 1 or 2, which can be arranged at β. The telescopic crane according to any one of claims 1 to 3, wherein the two tension wire supports (2.1; 2.2) are arranged on the upper side (3) of the jib. A pair of the wire support (2.1; 2.2) is provided at a selected location on the upper side (3) of the jib, one of which is the wire support (2.1). 5) is arranged on one side with respect to the retracting surface and another said wire support (2.2) is arranged on the other side with respect to the retracting surface. Telescopic crane. Stretching according to claim 5, wherein the leg ends (8) of both said tension wire supports (2.1; 2.2) are connected on the upper side (3) of the jib at a common location. crane. The leg ends (8.1; 8.2) of both said tension wire supports (2.1; 2.2) are offset from each other and connected at the upper side (3) of the jib. 5. The telescopic crane according to 5. The leg ends (8.1; 8.2) of the at least one tension wire support (2.1; 2.2) are connected between the upper side of the jib and the side walls (9, 9 ') of the jib. The telescopic crane according to claim 5 or 7 connected to a jib in a transition region between. A leg end (8.1) of the at least one tension wire support (2.1) is arranged on a support (10) projecting from the jib perpendicular to the retracting surface; The telescopic crane according to claim 5 or 7. The free head end (5) of the tension wire support (2) is selectively connected to the upper chassis, the lower chassis, and the jib leg region via first tensioning means (7). Selection of the main jib via the second tensioning means (6) connected to the counterweight, which is guided fixedly or separately, or to the bottom in the direction of the leg end of the jib The telescopic crane as described in any one of Claims 1-9 connected with a part of jib extension part provided in the done part or the head end part side of the said jib. The angular position of the tension wire support (2.1; 2.2) can be adjusted stepwise or continuously by turning the tension wire support (2.1; 2.2). The telescopic crane as described in any one of claim | item 1 -10. The telescopic crane according to any one of claims 1 to 11, wherein the length of the tension wire support is variable stepwise or continuously. The telescopic crane according to any one of claims 1 to 12, wherein the tension means is a rope or a rod. The telescopic crane as described in any one of Claims 1-13 which becomes the structure which the effect | action produced in the said tension | tensile_strength means is brought about by the tension | tensile_strength apparatus. The telescopic crane according to claim 14, wherein an angle adjustment and / or a length change of the tension wire support is provided by the tensioning device. The telescopic crane according to claim 14, wherein the tensioning device is a hoisting device (27.1; 27.2) or a piston-cylinder unit. The telescopic crane according to any one of claims 1 to 16, comprising at least two independently drivable tensioning devices for the tension wire mounting structure. The tensioning device is selectively attached to the tension support (18.1; 18.2), to the upper chassis, to the lower chassis, to the main jib, to the counterweight, or to the end of the jib. The telescopic crane of Claim 17 arrange | positioned at the jib extension part provided in a part side. A pair of said tension wire supports (18.1; 18.2) are arranged on said main jib in the region of said jib base (13). The telescopic crane described. The free head end part of the said tension | pulling wire support tool is connected with one head or color | collar provided in the said expansion / contraction advance / retreat part inside in the head side of the said jib. The telescopic crane described in 1. Each tensioning support (18.1; 18.2) is connected to a piston-cylinder unit (20.1; 20.2) supported on the base of the jib for possible side tilt. The telescopic crane as described in any one of Claims 18-20. 22. Each tension line support (18.1; 18.2) has two generally parallel crossbeams (21.1; 22.1; 21.2; 22.2). The telescopic crane as described in any one of. A hoisting device (27.1; 27.2) is installed between the cross beams (21.1; 22.1; 21.2; 22.2) of each wire support (18.1; 18.2). The telescopic crane according to claim 22, wherein the telescopic crane is arranged. The telescopic crane according to any one of claims 1 to 23, wherein a rigid auxiliary jib formed from a support tower is attached to a head of the telescopic advancement / retraction part inside. 24. A retractable auxiliary jib formed from a support tower is attached to the head of the innermost telescopic part by means of at least one retracting support. Telescopic crane. Measuring means are provided for detecting deformation of the side surface of the jib, and the measuring means is attached to a tensioning device that influences the tension of the tensioning structure on the side surface of the jib by control. The telescopic crane as described in any one of Claims 1-25. Deformation of the side of the jib occurs, directly or indirectly, on the dimensions of the crane, such as the tension of the tensioning means, the length of the tensioning means, and the extension of the tensioning means, and the side of the jib 27. The telescopic crane according to claim 26, wherein the telescopic crane is configured to be detectable on the basis of forces acting on the jib in the form of wind, sunlight exposure and temperature dominant on the main jib.

Images