JPH1129290A - Foldable lower weight of crawler crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower weight capable of installing a large capacity lower weight installed on the lower frame of a crawler crane without using any auxiliary crane with divided foldable structure and also securing a space in front of a crane which is necessary for lifting operation and base system attachment operation with short jib structure. SOLUTION: The lower weight 1 of a crawler crane comprises a lower weight 1A installed through a pin 3 on a crane main body and a lower weight 1B connected foldably to the lower weight 1A through a pin 2. Also a lifting lug 7 capable of fixing to a shackle 6 which is provided at the lower end of a wire rope 4 capable of connecting to a main jib is provided on the upper surface of the lower weight 1A installed on the crawler crane main body side. In addition, lifting lugs 8 and 9 are provided on the upper and lower end surfaces of the other lower weight 1B which is fixed to the pin 2 foldably to the lower weight 1A installed on the main body side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable lower weight in a cradle.

[0002]

2. Description of the Related Art Lower flares are used in chlora-cranes.
In the lower weight to be mounted on the system, there is the following problem with the integrated large-capacity lower weight having no folding structure. (1) When the lower weight is long in the front-rear direction of the machine, the position of the suspension lug b for suspending the lower weight a is separated from the machine body when the lower weight a is mounted as shown in FIG. Therefore, by connecting the crane main jib c and the lower weight a with a wire rope d,
The weight a can be detached by itself (FIG. 9). However, a working space in front of the crane cannot be secured. (2) When the lower weight is short in the front-rear direction of the machine, the position of the suspension lug b for suspending the lower weight a approaches the machine body when the lower weight a is mounted. For this reason, the above-mentioned detachment by itself cannot be performed due to insufficient stroke. Therefore, an auxiliary crane is required for mounting the lower weight a (FIG. 10).

[0003]

The lower weight to be mounted on the lower frame of the cranes is divided into a folded structure, so that a large-capacity lower weight can be used as an auxiliary crane. Without using a crane, and it is possible to secure the space in front of the crane necessary for lifting work and foundation attachment work with a short jib configuration without using a crane body. To provide lower weights.

[0004]

A lower weight 1 of a crawl crane is attached to a crane body via a pin 3 and a lower weight 1A is foldable via the lower weight 1A and the pin 2. And another lower weight 1B connected to the other. Further, a hanging lug 7 is provided on the upper surface of the lower weight 1A attached to the main body of the crawler crane, which can be connected to a shackle 6 provided at the lower end of a wire rope 4 which can be connected to the main jib c. Another one connected to the lower weight 1A to be attached and the pin 2 so as to be foldable.
Hanging lugs 8 on the upper and lower end faces of the lower weights 1B
And a hanging lug 9 were provided, and the wire rope 4 was connected to these to enable folding of the lower weight.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 in FIG.
Is a foldable lower weight according to the present invention. The lower weight 1 is composed of lower weights 1A and 1B connected by connecting pins 2. Reference numeral 3 denotes a pin for attaching the lower weight 1 to the crane main body. 4
Is a wire rope for lifting the lower weight 1 and has a shackle 5 attached to the upper end and a shackle 6 attached to the lower end.

[0006] The lower weight 1A has a suspension lug 7 for suspending the entire lower weight 1 composed of another connected lower weight 1B. On the other hand, the lower weight 1B is connected to the lower weight 1A by a pin 2 on the upper surface side, and the lower weights 1A and 1
B is configured to be in contact with the end face, and is configured to be folded so as to be rotatable about the pin 2. On the upper and lower sides of the lower weight 1B, suspension lugs 8 for connecting the shackle 6 of the wire rope 4 when the lower weight 1B rotates.
And a suspension lug 9.

(Operation) The mounting and detaching operation of the lower weight, which is configured as described above, and which can be folded will be described. (1) Attaching the lower weight (FIGS. 2 to 5) The crane main jib c and the suspension lug 7 of the lower weight 1A are connected by shackles 5 and 6 provided above and below the wire rope 4 ( 2), the entire lower weight 1 is fixed to the crane lower frame via the pin 3 by the raising and lowering operation of the main jib c (FIG. 3). Next, the hanging lug 9 on the lower weight 1B side
Is similarly hooked on the shackle 6 of the wire rope 4 and connected to the crane main jib c, and the lower weight 1B is folded by raising and lowering the main jib (FIGS. 4 and 5). (2) Removal of the lower weight (Figs. 6 to 8) The shackle 6 of the wire rope 4 is hooked on the crane main jib c and the hanging lug 8 of the lower weight 1B, and the lowering of the main jib is performed. The weight 1B is rotated back to the front (FIGS. 6 and 7). Next, the hanging lug 7 of the lower weight 1A is connected to the main crane of the crane with the wire rope 4 to extract the pin 3, and then the main jib is raised and lowered to remove the lower weight (FIG. 8).

[0008]

According to the first aspect of the present invention, since it can be divided and folded, a large-capacity weight can be mounted compactly by itself without using an auxiliary crane. According to the second aspect of the present invention, the lifting operation can be easily performed by the wire rope 4 at the time of self-attachment, and conversely, the detachment by itself can be performed very easily.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of the present invention.

FIG. 2 shows a state in which a lower weight is connected to a main jib by a wire rope in order to be mounted.

FIG. 3 lifts and mounts the lower weight 1A to the machine body with the pin 3;

[FIG. 4] The wire rope is hung on a hanging lug of the lower euit 1B.

FIG. 5 shows the completion of bending of the lower weight 1B.

FIG. 6 shows a state in which the lower weight 1B is hooked on a wire rope and lifted to remove the lower weight.

FIG. 7 shows a state where the lower weight 1B is rotated.

FIG. 8 shows a state in which a wire rope is hung on the lug of the lower weight 1A.

FIG. 9 shows a conventional method of attaching a long lower weight.

FIG. 10 shows a state in which a short lower weight is attached.

[Explanation of symbols]

 1, 1A, 1B Lower weight 2 pin 3 pin 4 Wire rope 5, 6 Shackle 7 Hanging lug 8 Hanging lug 9 Hanging lug

Claims (2)

[Claims] Crawler crane lower weight (1)
A lower weight (1A) which is attached to the crane body via a pin (3), and another lower weight (1A) which is foldably connected to the lower weight (1A) and the pin (2).
B) A foldable lower weight in a chlora crane characterized by comprising: 2. A shackle (6) provided at the lower end of a wire rope (4) that can be connected to the main jib (c) on the upper surface of a lower weight (1A) attached to the crawl crane body side. Lower lug (7) and a lower lug attached to the main body
A hanging lug (8) and a hanging lug (9) are provided at the upper and lower end surfaces of another lower weight (1B), which is connected to the weight (1A) by a pin (2) so as to be foldable. −
3. A foldable lower weight in a cradle according to claim 1, wherein said lower weight is foldable by connecting said lower weight to said lower weight.