JP2520329Y2 - Self-propelled crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a self-propelled crane.

(Prior Art) A self-propelled crane is mounted on a vehicle 1 as shown in FIG.
A swivel base 3 in which a pair of left and right brackets 2 and 2 is erected is rotatably attached, and the base end of the telescopic boom 4 is positioned between the pair of left and right brackets 2 and 2 and the base end of the telescopic boom 4 is positioned. Is connected to a pair of left and right brackets 2, 2 so that it can be raised and lowered so that the telescopic boom 4 can be laid down along the front-rear direction of the vehicle 1 when traveling. A hydraulic drive winch 6 is attached between the pair of left and right brackets 2, 2 at a position near the rear end of the swivel base 3, and the telescopic boom 4 of the telescopic boom 4 is extended via a wire rope 7 drawn from the hydraulic drive winch 6. The hook block 8 is suspended from the tip.

Such an arrangement of the hydraulic drive winch 6 is used for the telescopic boom 4
There is a problem in that the position of the pivot connection 5 cannot be located in the vicinity of the rear end of the swivel base 3. Therefore,
There has been a problem that the length of the telescopic boom 4 of the self-propelled crane, which is restricted in its total length during traveling and traveling, is shortened accordingly.

In order to deal with this problem, the hydraulic drive winch 6 is arranged below the telescopic boom 4 or above the telescopic boom 4, and the position of the pivot support 5 of the telescopic boom 4 is set to the rear end of the swivel base 3. It is conceivable that the hydraulic drive winch 6 is located below or above the telescopic boom 4 when the self-propelled crane travels while the hydraulic drive winch 6 is located near the part. The height of the self-propelled crane when traveling is increased by the height of, and there was a practical problem.

An object of the present invention is to provide a self-propelled crane that solves the above-mentioned problems of the prior art.

(Means for Solving Problems) In order to achieve the above-mentioned object, the self-propelled crane of the present invention has a swivel base 3 on which a pair of left and right brackets 2 and 2 are erected upright mounted on a vehicle 1 so as to be freely rotatable. , The base end of the telescopic boom 4 is pivotally connected to the pair of left and right brackets 2, 2 so that the base end of the telescopic boom 4 is positioned between the pair of left and right brackets 2, 2 so that the base end of the telescopic boom 4 can be raised and lowered. Then, the position of the pivotal connection is located at the rear end position of the swivel base, and during the traveling movement,
The telescopic boom 4 may be configured to travel in a lying state along the front-rear direction of the vehicle 1, and the bracket 2
Of the hydraulic drive winch 6 at a position where at least a part thereof overlaps with the telescopic boom 4 in a lying state in a side view, and further, at a position near the tip of the telescopic boom 4, A guide pulley, which serves as a fleet angle fulcrum of the wire rope 7 that reaches the hook block 8 that is pulled out from the drum of the hydraulically driven winch 6 and hung at the end of the telescopic boom 4, is configured.

(Operation) In the self-propelled crane of the present invention configured as described above, the base end portion of the telescopic boom 4 is pivotally connected 5 to the pair of left and right brackets 2 and 2, and the position of the pivotal connection 5 is determined. Is located at the rear end position of the swivel base 3, and the hydraulic drive winch 6 is located outside the bracket 2 so that at least a part of the hydraulic drive winch 6 overlaps the telescopic boom 4 in the lying state in a side view. Therefore, the position of the pivot support connection 5 which is the undulation fulcrum of the telescopic boom 4 can be located near the rear end of the swivel base 3, and the telescopic boom 4 can be made that much longer. Moreover, according to this configuration, during traveling movement of the self-propelled crane,
A hydraulic drive winch 6 is provided below or above the telescopic boom 4.
Since the position is not positioned, the height of the self-propelled crane during traveling does not increase.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. Compared with the conventional self-propelled crane shown in FIG. 1, the self-propelled crane of the present invention mainly uses brackets 2,2.
Since only the arrangement of the hydraulic drive winch 6 is different, the reference numerals 1 to 8 shown in FIG. 1 and described as the prior art are also referred to as the same meanings in the following description.

2 and 3, a pair of left and right brackets
2 and 2 are set up on a swivel base 3. The telescopic boom 4 has its base end portion positioned between the pair of left and right brackets 2, 2 and has its base end portion paired with the left and right brackets.
It is pivotally connected to 2 and 2 so that it can be raised and lowered. That is, the pivotal connection 5 serving as the undulating fulcrum of the telescopic boom 4 is located at the rear end position of the swivel base 3. The hydraulic drive winch 6 is attached to the outer side position of the bracket 2 at a position where at least a part of the hydraulic drive winch 6 overlaps the telescopic boom 4 in a lying state in a side view. Reference numeral 9 denotes a guide pulley attached to a position near the tip of the telescopic boom 4 (in this embodiment, a position near the tip of the outer boom of the telescopic boom 4), which is pulled out from the drum 6A of the hydraulic drive winch 6 and telescopically extended. It serves as a fleet angle fulcrum of the wire rope 7 reaching the hook block 8 hung at the tip of the boom 4. Ten
Is a pulley which is rotatably and slidably supported in a lateral direction on a support shaft 11 which is provided at a proper position in the base end portion of the telescopic boom 4 so as to project in the lateral direction. The guide pulley 9 and the hydraulic drive winch 6 are provided. It guides the wire rope 7 between them. The support shaft 6B of the winch drum 6A of the hydraulically driven winch 6 is orthogonal to the straight line 12 that connects the intermediate position of the winch drum 6A in the drum width direction and the pulley 9 in a plan view (FIG. 3). The support shaft 11 is also orthogonal to the straight line 12.

In the above-mentioned embodiment, the hydraulic drive winch 6 is a single drum type, but as shown in FIGS. 4 and 5, two capstan drums 13 and 14 and one winding drum 15 are used. It may be configured as a capstan winch. In this case, since it is not necessary to secure the fleet angle of the wire rope 7 wound around the capstan winch, it is not necessary to secure a large passage space for the wire rope 7.

(Effect) In the self-propelled crane of the present invention configured and operated as described above, the position of the pivot support connection 5 as the undulating fulcrum of the telescopic boom 4 is set to the swivel base 3 without increasing the height of the self-propelled crane. The telescopic boom 4 can be located near the rear end.
Can be long.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a conventional self-propelled crane, and FIG.
FIG. 5 is a drawing showing an embodiment of the self-propelled crane of the present invention, FIG. 2 is a side view of the self-propelled crane, FIG. 3 is a plan view of FIG. 2, and FIG. Fig. 5 is a side view of the self-propelled crane in the embodiment of Fig. 5, and Fig. 5 is a plan view of Fig. 4. Vehicles, 1, brackets, 2, swivel bases, 3, telescopic booms, 4, pivotal connections, 5, hydraulically driven winches, 6, wire ropes, 7, hook blocks, 8,

Claims (1)

(57) [Scope of utility model registration request] 1. A base end part of a telescopic boom with a base end part of the telescopic boom being positioned between the pair of left and right brackets so that a turntable having a pair of left and right brackets standing upright is rotatably mounted on the vehicle. Is pivotally connected to a pair of left and right brackets so that it can be undulated, and the position of the pivotal connection is located at the rear end position of the swivel base. The hydraulic drive winch is attached to the outside position of the bracket so that at least a part thereof overlaps the telescopic boom in a lying state in a side view, and At the position near the tip of the telescopic boom, the wire rope that reaches the hook block pulled out from the drum of the hydraulic drive winch and hung at the tip of the telescopic boom is free. Self-propelled crane, characterized by being configured by attaching a guide pulley to be angle pivot.