JP3213587B2 - Auxiliary crane equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary crane device, and more particularly, to an auxiliary crane device attached to the tip of a boom when lifting or lowering a lightweight object other than the main work.

[0002]

2. Description of the Related Art FIG. 5 shows a general crawler crane 1 in which a boom 3 is pivotably mounted on a front part of a body 2 so as to be vertically rotatable, and a winch unit 4 is arranged behind the boom 3. In addition, the live mast 5 and the high gantry 6 are provided so as to be able to rotate back and forth. The hook rope 7a extended from the winch unit 4 passes through a top sheave 8 provided at a tip end of the boom 3 and a hook sheave 9a.
The main hook 10 is suspended from the hook rope 7a.

In addition, when lifting and lowering lightweight objects other than the main work, an auxiliary crane device 11 may be attached to the tip of the boom 3 separately from the main hook 10. An auxiliary sheave 12 is pivotally mounted on the auxiliary crane device 11, and an auxiliary rope 7b is hung around the auxiliary sheave 12 to suspend an auxiliary hook 13.

FIG. 6 shows a conventional auxiliary crane device 11 and an auxiliary jib 14 which is a base of the auxiliary crane device 11.
Are provided between left and right brackets 16 and 16 for supporting both ends of the sheave rod 15, left and right bracket arms 17 and 17 having one end fixed to the brackets 16 and 16, and between the left and right bracket arms 17 and 17. .., And the brackets 16, 16.
Left and right stays 19, 1 whose one end is connected to the lower part of
It consists of nine. The other ends of the stays 19 are fixed in advance to the tip of the boom 3 with bolts or the like. The auxiliary sheave 12 is pivotally attached to a sheave rod 15.

When the auxiliary crane device 11 is mounted on the end of the boom 3, the auxiliary jib 14 is lifted by the hook 20 of another crane, and is opened at the other end of the bracket arm 17. While matching the boom mounting hole 17b with the mounting hole 3a at the tip of the boom 3,
Boom mounting hole 19 formed in one end of the stay 19
a is matched with the hole 16a of the bracket 16. In such a state, the pin 21 is inserted into each of the overlapped holes to fix the auxiliary jib 14 to the tip of the boom 3.

[0006]

The auxiliary crane device is frequently attached and detached according to the construction work. The auxiliary crane device has a structure in which the bracket arm and the stay are separated in consideration of transportation and storage after removal, so each part must be connected at the site with pins and bolts, and The work was complicated. Also, when installing the auxiliary crane device on the boom, a lot of labor is required because the auxiliary jib is hung by another crane and a plurality of workers perform hole alignment and pin insertion while supporting each part. In addition, the desorption operation involves danger.

Therefore, there is a technical problem to be solved in order to easily and safely carry out the attaching / detaching operation of the auxiliary crane device and to facilitate the transportation and storage of the auxiliary crane device in a detached state. Because
An object of the present invention is to solve the problem.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and is an auxiliary crane device mounted on the tip of a boom. A jib, an auxiliary sheave pivotally attached to a distal end of the auxiliary jib, an auxiliary rope wrapped around the auxiliary sheave, and an auxiliary hook suspended from the auxiliary rope. Left and right brackets that support the bracket, left and right bracket arms having one end fixed to the bracket, a lattice rod bridged between the left and right bracket arms, and one end rotatably connected to the lower portion of the bracket. Left and right stays, and left and right links connecting the bracket arm and the stay, and the other ends of the bracket arm and the stay, respectively. Boom mounting hole is provided in,
Further, the present invention provides an auxiliary crane device in which one end of the link is pivotally attached so as to be able to turn over, and the other end of the link can be selectively fixed to either the bracket arm or the stay. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. It is to be noted that the same components as those in the related art are denoted by the same reference numerals.

FIG. 1 is a perspective view showing a state immediately before the auxiliary crane device 31 of the present invention is mounted on the tip of the boom 3, and shows an auxiliary jib 34 as a base of the auxiliary crane device 31.
Are provided between left and right brackets 16 and 16 for supporting both ends of the sheave rod 15, left and right bracket arms 17 and 17 having one end fixed to the brackets 16 and 16, and between the left and right bracket arms 17 and 17. .., And the brackets 16, 16.
And left and right stays 19, 19 connected to the lower part of the vehicle. Unlike the conventional type, the hole 19 at one end of the stay 19 is previously set.
The bracket 19 and the hole 16a of the bracket 16 are aligned with each other and are pin-connected. One end of the stay 19 is rotatably connected to the bracket 16.

Here, the left and right bracket arms 17
As shown in FIG. 2, one end 40a of the link 40 is pivotally attached to the bracket arm 17 so that the link 40 can be turned over. The portion 40b is provided with a pin 2 on a lug 41 protruding from the stay 19.
They are connected at 1.

If the other end 40b of the link is pulled up by pulling out the pin 21, the link 40 is turned down toward the bracket arm 17 as shown by the two-dot chain line in FIG. The other end 40b of the link can be fixed to the provided lug 42 with the pin 21. Also, a projecting piece 43 is protruded at an intermediate portion of the link 40,
A locking hole 44 is formed in the projection 43.

In the illustrated state, the other end 40b of the link
Is pin-connected to the lug 41 of the stay 19, and the pin 2
A washer 22 is fitted and inserted into the other end of 1, and is secured by a split pin 23. Therefore, the left and right bracket arms 17 and the stay 19 are fixed at a predetermined angle by the link 40, and the pitch between the boom mounting hole 17b at the other end of the bracket arm 17 and the boom mounting hole 19b at the other end of the stay 19 is predetermined. The dimensions (the pitch between the holes 3a and 3b at the end of the boom 3) are set so that the auxiliary jib 34 can be attached to the end of the boom 3.

Thus, the auxiliary jib 34 is lifted by the hook 20 of another crane, and the boom mounting hole 17b at the other end of the bracket arm 17 is connected to the mounting hole 3 at the tip of the boom 3.
a and a hole 19b at the other end of the stay 19
To the mounting hole 3b at the end of the boom 3. As described above, the bracket arm 17 and the stay 19
0, each boom mounting hole 1
7b and 19b exactly match the mounting holes 3a and 3b at the end of the boom.

In this state, the pin 21 is inserted into each of the overlapped holes to fix the auxiliary jib 34 to the tip of the boom 3. Thereafter, as shown in FIG.
When the auxiliary hook 13 is hung by hanging the auxiliary rope 7b around the auxiliary crane device 31, the auxiliary crane device 31 can be used.

On the other hand, when removing the auxiliary crane device 31 from the tip of the boom 3, the reverse operation is performed. Then, the auxiliary crane device 31 removed from the boom 3 folds the auxiliary jib 34 so that the auxiliary jib 34 is easily transported and stored. First, the pin 21 is pulled out from the other end 40b of the link 40 shown in FIGS. 1 and 2, and the link 40 is turned down to the bracket arm 17 side, so that the bracket arm 1
The other end 40b of the link is fixed to the lug 42 protruding from the pin 7 with the pin 21.

Subsequently, the stay 19 is turned to the bracket arm 17 side, and as shown in FIGS. 3 and 4, the left and right bracket arms 17 and the stay 19 are made to approach each other. At this time, the convex piece 43 of the link 40 and the stay 19
Since the lugs 41 projecting from each other overlap, the pins 21 are inserted into the locking holes 44 of the convex pieces 43 and are connected to each other, whereby the left and right bracket arms 17 and the stay 19 are fixed in a state of approaching each other.

In this manner, the auxiliary jib 34 is fixed in a folded state, so that the volume of the auxiliary crane device 31 during transportation or storage can be minimized, and each component remains connected. Since they are stored, there is no risk that some parts will be lost.

In this embodiment, one end 40a of the link 40 is pivotally attached to the bracket arm 17 so as to be able to turn over, and the other end 40b of the link 40 is connected to a lug 41 protruding from the stay 19 or a bracket. The lug 42 protruding from the arm 17 can be selectively fixed to one of the lugs 42. On the contrary, the other end 40b of the link 40 is pivotally attached to the stay 19 so as to be able to be turned over. One end 40a of link 40
May be formed so as to be selectively fixed to either the bracket arm 17 or the stay 19.

Thus, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0021]

According to the present invention, as described in detail in the above embodiment, the bracket arm is fixedly mounted on the bracket of the auxiliary jib, and the stay is rotatably connected to the bracket. Since the link is interposed, the link is raised and fixed at the time of assembling the auxiliary crane device, so that the boom mounting holes respectively provided at the other end of the bracket arm and the other end of the stay can be attached to the end of the boom. Exactly matches the hole.

On the other hand, after removing the auxiliary crane device,
Since the auxiliary jib is folded by inverting the link, the volume is reduced, and transport and storage are facilitated. In addition, since the components are stored while being connected, there is no possibility that the components will be lost during transportation or storage.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of an auxiliary crane device assembled when a boom is mounted.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is a perspective view of the folded auxiliary crane device according to the embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a main part of FIG. 3;

FIG. 5 is a side view of a general crawler crane equipped with an auxiliary crane device.

FIG. 6 is an exploded perspective view of a conventional auxiliary crane device.

[Explanation of symbols]

 3 Boom 12 Auxiliary Sheave 13 Auxiliary Hook 15 Sheave Rod 16 Bracket 17 Bracket Arm 17b Boom Mounting Hole 18 Lattice Rod 19 Stay 19b Boom Mounting Hole 21 Pin 31 Auxiliary Crane Device 34 Auxiliary Jib 40 Link 41, 42 Lug

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66C 23/64-23/70

Claims (1)

(57) [Claims] 1. An auxiliary crane device mounted on a tip of a boom, the auxiliary crane device comprising an auxiliary jib as a base, an auxiliary sheave pivotally attached to a tip of the auxiliary jib, and The auxiliary jib is composed of a suspended auxiliary rope and an auxiliary hook suspended from the auxiliary rope. The auxiliary jib includes left and right brackets supporting both ends of the sheave rod, and left and right brackets having one end fixed to the bracket. A bracket arm, a lattice rod bridged between the left and right bracket arms, a left and right stay rotatably connected to one end of the bracket below, and a left and right link connecting the bracket arm and the stay. The bracket arm and the stay each have a boom mounting hole provided at the other end thereof, and one end of the link is pivotally pivotable. It is, and the other end portion auxiliary crane apparatus being characterized in that a selectively securable to either one of the bracket arms or the stay of the link.