JPS6040552Y2 - Crane with additional boom - Google Patents

Description

[Detailed description of the invention] The present invention relates to a supplementary boom that is used by being appropriately attached to the tip of a telescopic boom of a crane.In particular, it is stored in a storage position on the top surface of the base boom, and when in use, it is attached to the tip of the tip boom. The present invention relates to a supplementary boom device which is of a type that assumes a mounting position and is structured so that it can be easily stored and mounted.

Next, the configuration of the present invention will be explained in detail based on a specific embodiment.

Reference numeral 1 designates a base end boom whose base end is pivotally supported 3 on a crane mount 2 and is raised and lowered by the extension and contraction movement of a raising and lowering cylinder 4.

5 is an intermediate boom fitted into the base end boom 1, and 6 is a tip boom fitted into the intermediate boom 5, which can be extended and contracted by hydraulic cylinders (not shown) provided respectively. .

These booms 1, 5.6 form a telescopic boom A.

7 is a boom head provided at the tip of the tip boom 6, and the boom head 7 is provided with sheaves 10 and 11 through which a wire rope 9 let out from a winch 8 provided on the crane frame 2 passes. These sheaves 10,
The wire rope 9, which has passed through the wire rope 11, suspends a main hook 12 for hanging a load below the boom head 7.

Reference numeral B denotes a supplementary boom, which is formed into an elongated cylinder with a rectangular cross section, and a sheave 13 is disposed at the tip.

This supplementary boom B is stored on the upper surface of the proximal boom 1, and is attached to the tip of the distal boom when in use.

Reference numeral 14 denotes a bracket disposed on the side of the upper surface of the base of the proximal boom 1, and the bracket 14 is provided with a horseshoe-shaped receiver section 15 that is open at the front; A protruding rod 16, which is installed at the rear end of the boom B and protrudes to both sides, is inserted into the receptacle.

17 is a bracket installed on the upper side of the front part of the base end boom 1, and a storage hole 18 is provided in the upper part;
The storage hole 18 and the storage hole 20 provided in the boss 19 provided at the front part of the replenishment boom B are overlapped with each other so that the pin 21 can be inserted into the storage hole 18.

Reference numeral 22 denotes a support roller that is located below the bracket 17 and supports the bottom surface of the refill boom B. Reference numeral 23 is located between the bracket 17 and 14, and the lower surface of the refill boom B together with the support roller 22. This is a support roller that abuts and supports the bracket 24, and is disposed on the bracket 24.

The supplementary boom B can be slid back and forth on the upper surface of the telescopic boom A by means of these support rollers 22 and 23, and when it is slid rearward, the protruding rod 16 moves to a state where it fits into the receiving part 15. In this state, the storage holes 18 and 20 overlap, so the operator can easily fit the pin 21 into both holes 1B and 20, and this fitted state is the base end boom of the supplementary boom B. It is stored on the top surface of 1.

In this retracted state, the additional boom B
Since the protruding rod 16 is fitted into the front opening portion 15, the refilling boom B is prevented from swinging up and down due to vibration or the like via the pin 21.

Next, when the replenishment boom B is slid forward and the replenishment boom is in use, the protruding rod 16 fits into the notch 31 located at the upper part of the boom head 7 and opening rearward.

In this fitted state, the protruding rod 16 of the boom B is added.
The retaining hole 25 provided in front of the boom head 7 and the engagement hole 26 provided in the boom head 7 in front of the notch portion 31 are overlapped and the pin 21 is inserted into the state in which the additional boom B is inserted into the tip boom 6. This is the state in which the refill boom B attached to the tip is in use.

And, even when this additional boom B is in use,
Since the protruding rod 16 is fitted into the notch 31, the refilling boom B can be prevented from swinging up and down via the pin 21 due to vibration or the like.

In addition, 27 is a support roller provided on the boom head 7, and when the replenishment boom B is pulled out forward, it abuts and supports the lower surface of the replenishment boom B instead of the support rollers 22 and 23, and 28 is a handle provided at the tip of the replenishment boom B, and is used to manually move the replenishment boom B back and forth via the handle 28.

Further, 29.30 are long holes drilled on the lower and upper surfaces of the refilling boom B, respectively, and when the refilling boom B is fixed to the boom head 7 and the refilling boom B is in use, the main hook 12 is The end of the suspended wire rope 9 is passed through these elongated holes 29.3G, hung on the sheave 13, and then fixed to a sub hook (not shown).

In addition, in order to prevent the main hook 12 from moving when the wire rope 9 is pulled out and the sub hook is used for cargo handling work, the main hook 12 must be connected to the side of the boom head 7 by a connecting member (not shown). ).

In summary, the present invention provides an additional boom that can be slid back and forth on the top of two or more stages of telescopic booms, and
In a crane having a replenishment boom that is selectively supported at a storage position where the refill boom is supported on the upper surface of the proximal boom and a device position where the refill boom is supported on the boom head at the tip of the distal boom, in the storage position, the refill boom is Insert the protruding rod provided at the base end of the boom into the receiver that opens forward at the base end of the base boom, and fix the additional boom at the appropriate place with a pin to the base boom, and in the above mounting position. , the protruding rod is inserted into a notch at the top of the boom head that opens rearward, and an engagement hole on the supplementary boom side provided in front of the protruding rod and an engagement hole on the boom head side provided in front of the notch. Since the engagement holes are fixed with pins to support each refilling boom, the conventional type requires at least two pins to prevent and support the refilling boom. In contrast to the troublesome task of aligning the holes into which the pins are inserted, the present invention has practical effects in that only one pin is required and the holes in which the pins are inserted can be aligned extremely easily. It is something.

[Brief explanation of the drawing]

FIG. 1 is a side view of the upper part of a crane showing one embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. A: Telescopic boom, B: Additional boom, 1: Base end boom, 6: Tip boom, 7: Boom head, 16: Projecting rod,
15: Receptacle, 21: Pin, 31: Notch, 25: Engagement hole, 26: Engagement hole.

Claims (1)

[Scope of utility model registration request] An additional boom is installed on the upper surface of two or more stages of telescopic booms so as to be able to slide back and forth, and the additional boom is supported on the upper surface of the base boom in the storage position and in the mounting position where it is supported on the boom head at the tip of the tip boom. In the crane having a replenishment boom that is selectively supported at At the same time, the additional boom is fixed to the proximal end boom at a proper position with a pin, and in the mounting position, the protruding rod is inserted into a notch that is located at the top of the boom head and opens to the rear, and the protruding rod is provided in front of the protruding rod. 1. A crane having a replenishment boom, characterized in that an engagement hole on the replenishment boom side and an engagement hole on the boom head side provided in front of the notch are fixed with pins to respectively support the replenishment boom.