JP3263028B2 - Upper revolving unit attachment / detachment device for construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching and detaching an upper revolving unit of a construction machine, and more particularly to a construction machine capable of lifting an upper revolving unit of a crane truck smoothly from a lower traveling unit. And an upper revolving unit attaching / detaching device.

[0002]

2. Description of the Related Art Conventionally, an upper revolving unit attaching / detaching device for a construction machine of this type will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a crane truck of a construction machine. The crane truck 1 includes a lower traveling body 2 and an upper rotating body 3 mounted on the lower traveling body 2. When the upper revolving unit 3 is attached to and detached from the lower traveling unit 2, the crane truck 1 is installed in a pre-installed symmetrically disposed portal frame 4, 4.
Then, the outriggers 6, 6 are extended and held on the ground, and the detachment operation of the upper revolving unit 3 provided on the portal frames 4, 4 is performed. Since the attachment / detachment device 5 is provided symmetrically on the portal frames 4 and 4, the right attachment / detachment device 5 will be described with reference to the right side view of FIG. 4. Although a detachable device having the above configuration is provided, the description of the detachable device 5 on the left side is omitted here.

[0003] The main columns 4a, 4a of the portal frame 4 are extendable and contractible, and horizontal members 4b are provided in the front-rear direction of the tops of the main columns 4a, 4a, and both ends of the horizontal members 4b. A pair of crosspieces (not shown) are provided in the left and right directions. A sheave 7 is provided on the substantially central side surface of the horizontal member 4b.
a, a sheave 7b is also provided near the rear end of the horizontal member 4b, and a wire rope drawn out from a winch drum (not shown) provided on the upper swing body 3. One of the wire ropes 8, 8 is hung around the sheave 7 a at the central portion, and the locking member provided at the tip of the wire rope 8 is attached to the upper rotating body 3.
And the other wire rope 8 is hung around the sheave 7b at the rear end, and the wire rope 8 is wound around the sheave 7b. An attachment / detachment device 5 for the upper revolving unit 3 is formed so that a locking member provided at a tip end of the rope 8 can be locked to a locking unit 11 at a rear portion of the upper revolving unit 3. Thus, when the upper swing body 3 is locked by the wire ropes 8, 8 and the upper swing body 3 is lifted from the lower traveling body 2, the main pillars 4a, 4a of the portal frame 4 are moved. This is done by stretching.

When the upper swing body 3 is lifted, the sheaves 7a and 7b provided on the portal frames 4, 4 and the wire ropes 8, 8 hung around the sheaves 7a and 7b and hung. In many cases, the locking position of the tip deviates from the vertical line. In such a case, the upper revolving unit 3 is lifted obliquely, and as shown in FIG. 5, a connecting portion 9 between the upper revolving unit 3 and the lower traveling unit 2 is formed.
The upper fitting body 12 is bitten between the ball races 13 fixed to the lower traveling body 2.

[0005]

The above-mentioned conventional upper-revolving-body detaching / attaching device is constructed so that the upper-revolving superstructure is lifted by a flexible wire rope, and is usually arranged above the portal frame. In some cases, the sheave on which the wire rope is looped and hung and the locking portion of the upper swing body that is locked to the tip of the wire rope are deviated from the vertical line, but this deflected state is difficult to visually recognize. Therefore, the upper swing body is lifted obliquely upward.
In such a case, biting will occur at the connection between the upper revolving unit and the lower traveling unit, and the wire rope will be stretched by excessive tension, and then the biting will be released and the upper turning unit will be disengaged. When the body is lifted, the wire rope contracts, and the upper swing body jumps greatly, posing a danger to the surroundings.

Therefore, when the upper revolving unit of the construction machine is lifted separately from the lower traveling unit, the upper revolving unit is displaced from the vertical line and is lifted in an oblique direction. Technology to solve the problem in order to prevent the upper revolving structure from jumping up and being lifted even if biting occurs at the connecting portion of Therefore, an object of the present invention is to solve the problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and comprises a pair of frames disposed so as to face left and right. A beam is provided in the left-right direction of the section, and a pair of left and right cylinders is disposed at a substantially central portion of the beam at a predetermined distance, and a cylinder for correcting a suspension position is interposed between the cylinders. The pair of left and right cylinders is mounted so as to be able to move left and right, and a locking member made of a rigid body such as a shackle is attached to the tip of the piston rod of the cylinder via a link. The locking device is locked to an intermediate portion of the upper revolving structure of the construction machine by the vertical operation and the interval adjusting operation, and a rear link of the upper revolving structure is connected to a link formed of a rigid body disposed at a rear portion of the frame. After the stop is locked There is provided an upper revolving body desorber for a construction machine of the upper revolving structure is configured so that it can be lifted from the undercarriage in stretching operation of the main pillars of the frame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. For convenience of explanation, the same components as those of the conventional example are denoted by the same reference numerals. FIG.
When the upper revolving superstructure 3 of the crane truck 1 of the construction machine is attached or detached, the upper revolving superstructure 3 is mounted on the lower traveling body 2 with a boom or a jib or the like provided at the time of work removed. ing. And the crane truck 1 has an upper revolving unit 3
At the time of attachment and detachment, the vehicle enters and stops between a pair of left and right opposed gate frames 4 and 4 and stops, and the outriggers 6 and 6 are extended and held.

The revolving superstructure 3 is lifted by a detaching device 14 provided on the portal frame 4. Thus, the upper-revolving-body detaching / attaching device 14 is provided symmetrically as shown in FIG. Therefore, the attachment / detachment device 14 will be described. In the figure, main pillars 4a, 4 of portal frames 4, 4
a, 4a, 4a are extendable and contractible, and
4a, 4a, 4a, horizontal members 4b, 4b
And a beam member 15 is provided substantially at the center of the horizontal members 4b, 4b, and in the left-right direction. Two pairs of brackets 15a, 15a and 15b, 15b are protrudingly provided at the center of the beam member 15, and cylinders 16, 16 are disposed on each pair of brackets 15a, 15a, 15b, 15b. A rigid link 18 is attached to the tip of the piston rod 17, 17 of the cylinder 16, 16.
The shackles 19, 19 are attached to the upper slewing body 3 via the central shackles 19, 19 so that the shackles 19, 19 are locked by the center locking portions 10, 10 provided above the connecting portion 9 of the upper swing body 3. It is configured.

The main columns 4a, 4 of the left and right portal frames 4
At the tops of the a, 4a, and 4a, crosspieces (not shown) are provided on the left and right, and a pair of brackets 20, 20 are fixedly mounted on substantially the side surfaces of the rear crosspiece at substantially the center.
Rigid links 21 and 21 hang down from 0 and 20, respectively.
The links 21 and 21 are configured to be locked to locking portions 11 and 11 at the rear of the upper swing body 3 respectively.

On the other hand, as shown in FIG.
A suspension position correcting cylinder 22 having a cylinder 22a is provided, and a piston (not shown) fitted to the hanging position correcting cylinders 22 and 22 so as to be slidable left and right is protruded and retracted on both left and right sides. Piston rod 2 provided freely
2a and 22a are connected to the brackets 15a and 15b.
The suspension position correcting cylinder 22
The shackle 1 connected to the distal ends of the piston rods 17, 17 of the cylinders 16, 16 by the relative movement of the left and right piston rods 22a, 22a.
9, 19 and the locking portions 10, provided on the upper swing body 3,
It is formed so that the locking position with 10 can be modified.

Next, the operation of the attachment / detachment device 14 of the upper swing body 3 will be described. First, the four main pillars 4a, 4a, 4a, 4a of the portal frame 4 on which the detachment device 14 is disposed.
Is extended to a height at which the crane truck 1 can enter, the crane truck 1 is advanced to the center of the portal frames 4, 4, and the locking portion 1 at the center of the upper revolving unit 3
The positions of the cylinders 0, 10 and the cylinders 16, 16 in the front-rear direction are determined, and the outriggers 6, 6 are extended to fix the crane truck 1.

Subsequently, the shackles 19, 19, which are engaged with the distal ends of the piston rods 17, 17, are adjusted by expanding and contracting the cylinders 16, 16, so that the locking parts 10, 10, and links 21, 21, which are engaged with brackets 20, 20 fixedly mounted on the rear crosspiece, are fixed to locking portions 11, at the rear of the upper swing body 3.
Lock to 11. At this time, the locking portions 10 and 1 at the central portion
If the suspension position of the shackle 0 and the shackle 19 is displaced in the left-right direction, the cylinders 16 are finely adjusted left and right by the suspension position correcting cylinder 22.
Then, the cylinders 16, 16 and the locking portions 10, 10
Are adjusted so as to be on a vertical line as much as possible, so that the locking portions 10, 10 are attached to the piston rod 1 of the cylinders 16, 16.
The shackles 19 and 19 connected to the shackles 7 and 17 are locked.

As described above, when lifting the upper swing body 3 as much as possible, the four main pillars 4a, 4a, 4a, 4a of the portal frames 4, 4 are extended and executed. However, even in this case, the upper revolving unit 3 is lifted at an angle as shown in FIG.
May bite.

That is, since the clearance between the connecting portion 9 between the upper revolving unit 3 and the lower traveling unit 2 is very small, when the upper revolving unit 3 separates from the lower traveling unit 2 as described above, the upper revolving unit 3 is closed. The bite is inevitably generated due to a positional shift or inclination in the front-rear and left-right directions between the vehicle and the lower traveling body 2 or an inclination of the attaching / detaching device 14. Thus,
The upper revolving superstructure 3 is moved to the lower traveling
If the wire rope is separated from the conventional wire rope, the wire rope is supported, and the wire rope is stretched, so that the jumping occurs.In the present invention, since the wire rope is supported by a rigid body having no extensibility, the wire rope does not jump. The upper revolving unit 3 can be lifted safely and smoothly and separated from the lower traveling unit 2.

When the separated upper revolving unit 3 is to be incorporated into the lower traveling unit 2, the upper revolving unit 3 is lifted by a detaching device 14 for the upper revolving unit 3, as shown in FIG. The lower traveling body 2 is moved into the portal frames 4 and 4 and stopped and fixed at a predetermined position. Thereafter, the four main columns 4a, 4a, 4a and 4a of the portal frame 4 are contracted to The revolving superstructure 3 is lowered to a position where the connecting portion 9 is fitted. Next, the cylinders 16, 16 are finely adjusted in the left-right direction and the up-down direction so that the minute gap between the upper fitting body 12 of the connecting portion 9 and the ball race 13 is uniform, and then the main pillars 4a, The upper revolving unit 3 is fitted to the lower traveling unit 2 by further contracting 4a, 4a, 4a. Thus, the upper swing body 3 and the lower traveling body 2 can be fitted extremely smoothly and safely.

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.

[0018]

As described in detail in the above-described embodiment, the present invention has a predetermined distance from the center of the beam material installed substantially at the center of the upper part of the frame disposed to face left and right. A pair of left and right cylinders is disposed, and a locking member provided at a tip end portion of the piston rod of the cylinder is locked at an intermediate portion of an upper revolving structure of the construction machine, and a rigid body disposed at a rear portion of the frame. A locking portion at a rear portion of the upper revolving structure is locked by a link comprising: and the upper revolving structure can be lifted by an extension operation of a main pillar of the frame. When the revolving structure is lifted, the lifting position of the cylinder is finely adjusted so that the upper revolving structure can be locked and lifted. In this way, the position of the cylinder and the upper rotating body that is locked by the locking tool at the lower end of the piston rod of the cylinder is adjusted to be as vertical as possible. At that time, it is possible to prevent biting at the connecting portion between the upper revolving unit and the lower traveling unit as much as possible when the upper revolving unit is lifted, and the biting occurs. Even so, since the cylinder and piston rod that lift the upper revolving structure are rigid supports that do not extend like conventional wire ropes, the upper revolving structure does not jump up due to elongation like wire rope supports, and This is an invention having a truly significant effect, such as being able to lift the upper revolving structure from the lower traveling structure safely and smoothly.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view showing an embodiment of the present invention and showing a state in which a crane vehicle is inserted into and held in a portal frame that is erected to face left and right.

FIG. 2 is a partially cutaway front view of FIG. 1;

FIG. 3 is a partially cutaway side view showing a state in which an upper revolving structure of the crane truck of FIG. 1 is lifted separately from a lower traveling structure.

FIG. 4 is a side view showing a conventional example and showing a state in which an upper swing body is locked using a wire rope.

FIG. 5 is a partially cut-away longitudinal cross-sectional view of the connecting portion of the crane truck, showing a state where biting has occurred at the connecting portion between the upper revolving unit and the lower traveling unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane truck 2 Undercarriage 3 Upper revolving superstructure 4 Portal frame 4a Main pillar 14 Detachment device 15 Beam material 16 Cylinder 17 Piston rod 18, 21 Link 19 Shackle 22 Cylinder for hanging position correction 22a Piston rod for hanging position correction cylinder

Claims (1)

(57) [Claims] 1. A pair of frames disposed to face each other in a left-right direction, and a beam material is provided on the frame in a left-right direction of a substantially central portion of an upper portion of the frame, and the frame material is provided at a substantially central portion of the beam material. A pair of left and right cylinders is disposed at a predetermined distance, and a hanging position correcting cylinder is interposed between the cylinders so that the left and right pair of cylinders can be moved left and right. A locking member made of a rigid body such as a shackle is attached to the tip of the piston rod of the cylinder via a link, and the locking device is moved between the upper revolving unit of the construction machine and the vertical operation and the interval adjusting operation of the cylinder. After the locking portion at the rear of the upper revolving structure is locked by a link made of a rigid body disposed at the rear of the frame,
An upper-revolving-body detaching device for a construction machine, wherein the upper-revolving unit is lifted from a lower traveling unit by an extension operation of a main column of the frame.