JPH0729109Y2 - crane - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a crane, and more particularly to a novel crane having an outrigger for supporting a crane mast according to its inclination angle on an inclined ground.

[Prior Art] As an outrigger of a conventional crane of this type, as shown in FIG. 3, an outrigger beam 5 having a constant length is fixed on both sides of a mast 3, and a screw 8 with a manual handle is attached to the tip of the outrigger beam 5 from above. By turning the lower ground bracket 7
There is one in which the upper surface 31 of the mast 3 is held in a horizontal posture by moving up and down, and adjusting according to the inclination of the surrounding slope. Further, as shown in FIG. 4, similarly to the above, mounting holes 91 are provided at the tips of the outrigger beams 5 fixed to both sides of the mast 3.
There is one that attaches a plurality of pillars 9 that are opened up and down. Depending on the inclination of the surrounding sloping ground, select the mounting hole 91 of the pillar 9, and at the position of the selected mounting hole 91 the tip of the outrigger beam 5 Is fixed and the upper surface 31 of the mast 3 is held in a horizontal posture.

In some of these two outrigger beams 5, when the inclination angle of the peripheral slope becomes large, a stand corresponding to the angle is bent below the grounding bracket 7.

[Problems to be Solved by the Invention] However, the one shown in FIG. 3 described above cannot cope with the case where the range of adjustable angles is narrow and the inclination angle of the peripheral sloping ground is large.

Moreover, since the adjustment shown in FIG. 4 described above is an adjustment for positioning with bolts, not only the adjustment work is troublesome, but also it is difficult to perform fine adjustment.

Therefore, the present invention has been made in order to solve the problems of these conventional techniques, and has a wide range of application with respect to the inclination angle of the surrounding sloping land, and the adjustment operation can be performed not only for coarse adjustment but also for fine adjustment. The present invention aims to provide a crane equipped with a simple outrigger.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a crane having a plurality of outriggers for supporting a crane mast according to its inclination angle on a sloping ground, and a mountain side of the crane mast. On the valley side, one end is pivotally supported so that it can swing vertically, and the base end extending outward from this is supported on a sloping ground, and is composed of a pair of parallelogram links undulating from the sloping ground. One end of the outrigger, the chain take-up reeling device provided on these outriggers, and one corner of the parallelogram link are fixed, and the other end of the chain take-up is supported via a sprocket pivotally supported at its opposite angle. It is composed of a chain wound around an unwinder, and is provided with undulating means for undulating the outrigger by winding / unwinding the chain to adjust the angle. .

[Operation] In the above-mentioned configuration, the outrigger is aligned with the sloped ground around which the mast is installed, and the parallelogram link mechanism that constitutes the outrigger is deformed by the undulating means to adjust the mast to the sloped angle of the sloped ground. The outrigger will be fixed so that the work can be performed stably. Further, since the undulating means is configured to use a tensile force by the chain and the chain winding / unwinding device, it is cheaper and lighter than a cylinder or the like. Since the chain is wound around the chain take-up reel via the sprocket, the winding force of the chain in the chain take-up reel will be smaller than when directly winding, and the chain take-up reel can be made smaller. The weight can be reduced.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same reference numerals are used for the components common to the conventional ones.

1 is a side view of the crane of the present invention installed on a sloping ground,
FIG. 2 is a plan view of the main part of the same crane.

As shown in the figure, the crane 1 of this embodiment has a crane mast 3 provided with a jib 2 that swivels and raises upwards, and four locations where the outer peripheral surface of the mast 3 has a 90 ° phase difference (see FIG. 2). From the top to the top and bottom to freely swing and extend in the radial direction,
Four outriggers 5 for stabilizing the working position on the sloping ground 4, and an angle adjustment functioning as an undulating means for being assembled to each of the outriggers 5 and fixing these in an appropriate posture corresponding to the inclination angle of the sloping ground 4. It is mainly composed of means 6 and.

Specifically, the crane mast 3 is installed on a main horizontal plane 41 formed on the slope 4, and four sub-horizontal planes 42 formed on the slope 4 around the main horizontal plane 41 are radiated from the mast 3 in the radial direction. The ground bracket 7 provided on the proximal side of the outrigger 5 extending to
The angle adjusting means 6 adjusts the respective outriggers 5 to hold and fix the upper surface of the mast 3 in a horizontal posture.

The outrigger 5 has a parallelogram link which is pivotally supported at one side on the mountain side and one side on the valley side of the crane mast 3 and has a base end extending outwardly supported on a sloped ground so that the outrigger 5 can undulate from a sloped ground. It is composed of a pair.

Specifically, each of the outriggers 5 includes the mast 3
And, one end is connected to the outer peripheral surface of the mast 3 so that it can swing vertically and two horizontal link members 51 of the same length are provided parallel to each other along the four sloped surfaces. It is configured to form a parallelogram link mechanism with a vertical link member 52 which is connected and vertically moves in a posture of always standing in the vertical direction. The ground bracket 7 is connected to the lower end of the vertical link member 52.

In addition, in this embodiment, four outriggers 5 are 90
Although they extend in the radial direction with different degrees of phase, it is needless to say that the number is not limited to four.

Then, in order to install the ground bracket 7 on the sub-horizontal plane 42 and keep the upper surface of the mast 3 horizontal, the parallelogram link mechanism is undulated from the inclined ground by the angle adjusting means 6, and the angle is adjusted and fixed. It is supposed to do.

In this embodiment, the angle adjusting means 6 connects the chain 61 to the connecting point 53 between the upper horizontal link member 51 and the vertical link member 52.
One end of the chain is fastened and the chain 61 is attached to the lower horizontal link member.
It is wound around a chain sprocket 62 axially supported on one end side of 51 and pulled out to the proximal end side, and is wound around a manual handle 63 with a ratchet, which is a chain take-up and take-out device axially supported at the intermediate portion of the horizontal link member 51 below, and is wound up.・ Fixed and extended.

Next, the operation of the embodiment having the above-mentioned configuration will be described.

First, the mast 3 is positioned on the main horizontal surface 41 of the sloping ground 4, the outriggers 5 are aligned with the surfaces of the sloping ground 4 around the horizontal surface 41, and the grounding bracket 7 below the base end thereof is positioned on the sub-horizontal surface 42.

At this time, in FIG. 1, it is assumed that the upper surface 31 of the mast 3 is inclined downward to the right and the mountain side outrigger 5
It is assumed that the vertical link member 52 of FIG. 6 rotates clockwise around the connection point 54 with the ground bracket 7 and tilts downward, and the vertical link member 52 of the outrigger 5 on the valley side also tilts downward. .

In order to horizontally correct the downward slope of the upper surface 31 of the mast 3, first, the ratchet-equipped manual handle 63 assembled to the outrigger 5 on the valley side is rotated clockwise to wind up the chain 61. At this time, the vertical link member 52 linked to the chain 61 rotates counterclockwise around the connection point 54 with the ground bracket 7 to expand the angle α with the upper horizontal link member 51. , This lateral link member 51 is pushed up in the longitudinal direction, whereby the upper surface of the mast 3 is
The downward slope of 31 is corrected horizontally. At this time, the angle adjustment of the mountain side outrigger 5 is also performed incidentally.

When the rotation of the ratchet-equipped manual handle 63 is stopped when the upper surface 31 of the mast 3 becomes horizontal, the chain is held in a pulled state by a ratchet (not shown),
Therefore, the upper surface 31 of the mast 3 is maintained in a horizontal state.
In synchronization with this, angle adjustment is also performed on the mountain side outrigger 5.

On the other hand, conversely to the above, it is assumed that the upper surface 31 of the mast 3 is tilted to the right and the vertical link members 52 on the mountain side and the valley side are tilted upward.

In order to horizontally correct the upward inclination of the upper surface 31 of the mast 3, first, the ratchet-equipped manual handle 63 assembled to the mountain side outrigger 5 is rotated counterclockwise to wind up the chain 61. At this time, the vertical link member 52 connected to the chain 61 is connected to the grounding bracket 7 at a connection point 54.
Rotate clockwise about the center of the horizontal link member 51 to widen the angle β with the upper horizontal link member 51. Therefore, the connection point 55 with the mast 3 is lifted, and the upward inclination of the upper surface 31 is made horizontal. cure. At this time, the angle adjustment of the outriggers 5 on the valley side is also performed incidentally. At this time, when the rotation of the manual handle 63 with a ratchet is stopped when the upper surface 31 of the mast 3 is horizontal, the chain 61 is held in a pulled state by a ratchet (not shown), and thus the upper surface of the mast 3 is 31
Is kept horizontal.

The above-described adjustment of the upper surface 31 of the mast 3 to the horizontal state has been described with respect to the pair of outriggers 5 including the mountain side and the valley side of the mast 3 shown in FIG. 1, but the two pairs shown in FIG. Adjusting means 6 attached to the outrigger 5 of
Of course, it can be done jointly with.

As described above, in the present embodiment, since the outrigger is constituted by the parallelogram linkage, the outrigger can have the same shape and can cope with a wide range of changes in the inclination angle, and the load is only the axial force, and the weight Is reduced. Further, since the angle adjusting means is configured to use the pulling force by the chain and the ratchet manual handle, the angle adjusting means is cheaper and lighter than the case where it is configured by a cylinder or the like. Since the chain is wound around the ratchet manual handle via the sprocket, the chain winding force of the ratchet manual handle is smaller than when it is directly wound, and the ratchet manual handle can be made smaller and The weight can be reduced. Furthermore, since the angle adjusting means of the chain winding method is assembled to the parallelogram linkage mechanism of the outrigger, only the same outrigger is adjusted and the chain length is adjusted without changing the outrigger on the other side, The angle can be easily adjusted to support crane installation on sloping ground.
The crane installation period will be shortened, and the construction period for using the crane will be shortened as a whole.

[Advantages of the Invention] As described above, according to the present invention, the following excellent effects are exhibited.

(1) The shape of the outriggers can be made the same to accommodate a wide range of changes in the tilt angle.

(2) Since the outrigger is configured as a parallelogram link mechanism and the undulating means is configured by a chain and a chain winding / unwinding device, cost reduction and weight reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a crane embodying the present invention, FIG. 2 is a plan view of a main portion of the same crane as above, FIG. 3 is a side sectional view of an outrigger portion of a conventional crane, and FIG. It is a side sectional view of the outrigger part of the crane. In the figure, 1 is a crane, 2 is a jib, 3 is a mast, 4 is a sloping ground, 5 is an outrigger, 6 is an angle adjusting means, 7 is a ground bracket, 51 is a horizontal link member, and 52 is a vertical link member.

Claims (1)

[Scope of utility model registration request] 1. A crane having a plurality of outriggers for supporting a crane mast according to its inclination angle on a sloping ground, one end of which is pivotally supported at the mountain side and the valley side of the crane mast so as to be vertically swingable. , A pair of outriggers each having a base end extending outwardly supported on a sloped ground and configured of parallelogram links that can be undulated from a sloped ground, a chain winding take-out device provided on these outriggers, and the parallel One end of the quadrilateral link is fastened to one corner, and the other end consists of a chain that is wound around the chain take-up and take-out device via a sprocket pivotally supported at the opposite angle. A crane, comprising: a hoisting means for hoisting an outrigger to adjust an angle.