JP2001010782A - Bridle fixing device for crawler type travelling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set up a gantry and a falling/rising boom winch at the rear part of an upper revolving structure for a crane boom to fall or rise and mount a bridle on a pendant rope mounted at the end of the crane boom, and to facilitate fixing work for the bridle during falling of the boom for transporting a crawler travelling crane with a veil mounted on the gantry. SOLUTION: This device has rails 38, 38 protruded on both sides of the lower face of a bridle 5, linearly extending from one end thereof to the other end, and brackets 8, 8 fixed to the back of a base side boom 6 for supporting and fixing the bridle 5. Further, on the back of the base side boom 6, a guide rail 39 is set up for guiding the bridle 5 between the brackets 8, 8 and guiding a lock pin insertion hole 10 at both sides of the bridle to a position where the brackets 8, 8 correspond to the lock pin insertion hole 10. On the guide rail 39 and a rail 38 for the bridle 5, an engagement portion 40A and a locking portion 40B are respectively provided for locking where the lock pin insertion hole 10 in the bridle 5 corresponds to the lock pin insertion holes 9, 9 in the bracket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler-type traveling crane, and more particularly to a bridle fixing in a crawler-type traveling crane configured to fix a bridle with a pin on the back of a boom for transportation by a trailer. It concerns the device.

[0002]

2. Description of the Related Art In this kind of conventional crawler type traveling crane, an upper revolving unit is pivotably mounted on a lower traveling unit, and a crane device and a cabin are installed on the upper revolving unit to operate the crane device. . A gantry and a boom elevating winch are installed at the rear of the upper revolving structure to elevate the crane boom at the front of the upper revolving structure, and attached to the gantry and a pendant rope attached to the tip of the crane boom. The bail elevating rope is tied to a fixed system such as an upper revolving structure, and the crane boom is raised and lowered by winding and unwinding the winch. I do.

When the crawler type traveling crane is mounted on a trailer and transported, as shown in FIG. 8, the gantry 3 is turned over, the crane boom 4 is supported on the ground, and the bridle 5 is placed on the back of the crane boom 4. Fixing, removing the pendant rope (see Fig. 1), top boom (see Fig. 1)
, And then remove the crane boom 4
The top-side boom (not shown) is separated from the base-side boom 6 and transferred to the trailer 2.

In this case, the bridle 5 is fixed by locking pin insertion holes 9, 9 of brackets 8, 8, which are fixedly mounted on the rear sides of the base boom 6 for mounting the bridle 5, respectively. The lock pin insertion holes 9 on both sides of the lock pin insertion holes 9, 9 are adjusted by adjusting the extension amount of the boom hoisting winch 12 and adjusting the extension speed. , 10 is difficult to align with each other, and in fact, it is inevitable that complicated alignment by a bar or the like is performed on the unstable base side boom 6.

[0005] Therefore, in the crawler type traveling crane, there arises a technical problem to be solved in order to facilitate the operation of fixing the bridle for transportation, and the present invention has an object to solve the problem. I do.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object. An upper revolving unit is mounted on a lower traveling unit which travels by rotation of a crawler so as to be pivotable. A gantry and a boom elevating winch are installed at the rear of the upper revolving structure to raise the crane boom while the cradle boom is pivotably supported at the front of the boom. After attaching a bridle and attaching a bail to the gantry and winding a boom elevating rope to be extended from the winch around each pulley of the bridle and the bail, the tip of the rope is moored to a fixed system such as an upper rotating body. In the crawler-type traveling crane described above, the boom is used to support and fix the bridle close to the back of the boom to the back of the boom by extending the rope for raising the boom. A lock pin is fixedly provided on both sides of the rear surface of the bracket, and a lock pin insertion hole is formed in both sides of the bracket and the bridle so as to support and fix the bridle to the bracket by inserting a lock pin. An object of the present invention is to provide a bridle fixing device in a crawler type traveling crane provided with guide means for guiding between the brackets and positioning means for positioning the lock pin insertion hole of the bridle in alignment with the lock pin insertion hole of the bracket. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a crawler type traveling crane 21. The body is composed of a lower traveling body 23 which travels by rotation of a crawler 22 and an upper revolving body 24 which is supported by the lower traveling body 23 so as to be pivotable. ing. A crane device 25 for cargo handling and a cabin 26 as an operation room are installed on the upper revolving unit 24, and the traveling of the lower traveling unit 23, the turning of the upper revolving unit 24, and the crane device 25 are installed in the cabin 26. A variety of operating devices (not shown) for lifting operation of the robot are installed.

A crane boom 4 as a crane main body is pivotally supported on a front portion of the upper revolving structure 24 around a horizontal axis so as to be able to be lifted up and down. A winch device 12 for raising the boom is installed, and the gantry 3 is pivotally supported so as to be able to move up and down.

A bail 27 is attached to the gantry 3 and a pendant rope 28 is attached to the tip of the crane boom 4 so that the pulleys 29..., 30.
After wrapping the rope 31 for boom elevating more,
The tip of the boom raising rope 31 is moored to a fixed system such as the upper swing body 24.

In addition, a loading winch device 32 is installed between the crane boom 4 and the boom raising winch 12 for loading, and a loading rope 33 extended from the loading winch 32 is attached to the crane boom 4. The guide sheave 34 installed at the rear part of the boom top and the top sheave 35 installed at the front part of the boom top cause the guide sheave 34 to hang downward in the direction of gravity and wind around the sheave 37 of the hook block 36. Part is moored to the boom top of the crane boom 4.

Therefore, it is possible to set the boom angle by extending and winding the boom elevating rope 31 of the boom elevating winch 12, and by winding and unwinding the loading winch 32 and turning the upper swing body 24. The load can be moved to a predetermined position.

On the other hand, the crane 2 by the trailer 2
1, the crane boom 4 is composed of a base boom 6 and a top boom 7 which are freely connectable to each other, and the top boom 7 is separated from the base boom 6 during trailer transportation. Further, the brackets 8 are welded to the connection-side rear surface of the base boom 6, and the bridle 5 is supported and fixed to the brackets 8 by the lock pins 11. In this case, the support fixation of the bridle 5 with respect to the brackets 8, 8 is performed by the brackets 8, 8 on both sides on the rear side of the base boom 6.
And lock pin insertion holes 9, 9, 10 on both sides of the bridle 5
The lock pin insertion holes 9, 9, 1 are adjusted by adjusting the extension amount and the extension speed of the boom hoisting rope 31 as described above.
The alignment with each other is difficult.

Therefore, in this embodiment, in order to facilitate the fixing work of the bridle 5, as shown in FIG. 2, a straight line extending from one end to the other end is formed on both lower surfaces of the bridle 5. And the rails 38 of the bridle 5 are placed on the back of the base side boom, and the bridle 5 is attached to the pair of brackets 8,
8, the lock pin insertion holes 10 on both sides of the bridle 5 are inserted into the lock pin insertion holes 9, 9 of the brackets 8, 8.
Guide rail 39 (guidance means) for guiding to a position where it matches
And when the lock pin insertion hole 10 of the bridle 5 and the lock pin insertion holes 9 of the brackets 8 are aligned with each other by the guide of the guide rail 39, the bridle 5 moves by engaging with each other. Is provided.

As shown in FIGS. 3 to 5, the guide rail 39 has a U-shaped cross section in which the rails 38, 38 on the lower surface of the bridle 5 are respectively placed from above and the upper part is opened to guide obliquely downward. The rail members 43, 43 having the guide grooves 42 are connected to each other by a single connecting plate 44 in parallel with each other and at the same interval as the rail interval of the bridle 5, and on the back surface of the base side boom 6 and The aggregates 6A, 6 of the top boom 7 in the boom width direction.
A mounting base 45 for connecting B to each other is formed, and support brackets 46, 46 are welded to both sides of the upper surface thereof, while pins 47, 47 pivotally support the support brackets 46, 46 on both lower surfaces of the connecting plate 44, respectively. Hinges 48,4
The guide rail 39 is supported by the support brackets 46 so as to be rotatable around a horizontal axis.

A notch crossing the rails 38, 38 at the rear end side of the rails 38, 38 forms an engaging portion 40A as the positioning means, while the guide grooves of the rail members 43, 43 are formed. An engagement portion 40B that engages with the engagement portion 40A is provided at the front portion of 42,42.

Of course, each position of the engaging portion 40A and the locking portion 40B as the positioning means 40 is determined by the fact that the rails 38, 38 of the bridle 5 are locked by the guide grooves 42, 42 to lock the brackets 8, 8. When the lock pin insertion holes 10 of the bridle 5 are aligned with the pin insertion holes 9 and 9, they are engaged with each other and the bridle 5 is held at this engagement position.

Further, as shown in FIGS. 4 and 5, the support brackets 46, 46 and the rail members 43, 43
Are formed at predetermined intervals in the longitudinal direction on both sides of the lower part of the link, and pins 52 are inserted into the pin holes 51 at one end of one link 50 and the predetermined pin insertion holes 49 of the support bracket 46. The link 50 is supported by the support brackets 43 and 43, respectively, and the pin hole 5 at the other end of the link 50 is provided.
2 and another pin 53 is inserted into a predetermined pin insertion hole 49 of the rail member 43, and the angle of the guide rail 39 with respect to the horizontal plane corresponds to the movement locus of the bridle 5 when the boom elevating rope 31 is extended. The angle is set. The pins 47, 53 for setting the angles of the links 50, 50 are usually provided with the support brackets 46, 53 for fixing the guide rail 39 substantially horizontally.
The pins 46, 46 are inserted into the other pin holes 49 of the rail members 43, 43, and the angles of the rail members 43, 43 are set to the aforementioned angles by replacing the pins 47, 53 when setting the angle.

As described above, each rail 38 of the bridle 5 is provided with the guide groove 4 of each rail member 43 inclined at a predetermined angle by the extension of the boom elevating winch 12.
2 are respectively engaged from above, and at the same time, each guide groove 4 is engaged.
2, the lock pin insertion holes 10 on both sides of the bridle 5 move to the positions where the lock pin insertion holes 9, 9 of the brackets 8, 8 coincide with each other. The engaging portion 40 on the rear side of the rail 38 is
The engagement is stopped with the engaging portion 41 on the distal end side of No. 3 to stop the movement. Therefore, by setting the feeding speed of the boom hoisting rope 31 to a slow speed, the lock pin insertion holes 9, 9, 1 are formed.
Thus, the bridle 5 can be easily fixed to the brackets 8, 8 as compared with the related art.

Hereinafter, a procedure for transporting the crane by the trailer 2 will be described.

First, as shown in FIG. 1, the boom hoisting winch device 12 is operated to pull out the boom hoisting rope 31 at a slow speed, and the top of the crane boom 4 is supported on the ground. Next, as shown in FIG. 2 and FIG.
The guide rail 39 is flipped upward by a predetermined angle from the horizontal state (FIG. 2) by extracting and replacing the guide rails 7 and 53, and as shown in FIG. Set to corners. After the angle is set, it is confirmed that the crane boom 4 is supported on the ground, and then the rails 38 on both sides of the lower surface of the bridle 5 are guided by the respective rail members 43 by gradually extending the boom hoisting rope 31. It is placed in the grooves 42, 42. Accordingly, the bridle 5 moves obliquely downward along the guide grooves 42 of the guide rail 39, and the engaging portion 40A of the bridle 5 engages with the locking portion 40B as shown in FIG. At this time, the rope extension of the boom elevating winch 12 is stopped, and the lock pin insertion holes 9 and 9 of the bracket 8 and the lock pin insertion holes 10 on both sides of the bridle 5 are stopped.
At this time, the lock pin 11 is inserted and fixed. After that, the pendant rope 28 for raising and lowering is removed from the bridle 5, the boom 7 on the top side is cut off, and the rope 31 for boom elevating is appropriately wound as shown in FIG. A surface pressure (shearing force) is applied to the insertion holes 9, 9, and 10 to the extent that the rattling due to vibration and the lock pin are prevented from coming off, and thereafter, they are moved by self-propulsion, as shown in FIG. Mounted on trailer 2.

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.

[0023]

According to the present invention, as described in detail in the above embodiment, for example, rails extending linearly from one end to the other end are provided on both sides of the lower surface of the bridle as guide means, A bracket for fixing and supporting both sides of the bridle with a lock pin is fixed to the back of the base boom, and further, each rail of the bridle is supported on the back of the base boom, and both sides of the bridle are locked. A guide rail is provided to guide the pin insertion hole to a position where the pin is aligned with the lock pin insertion hole of the bracket, and lock pin insertion holes on both sides of the bridle are provided on the guide rail and the bridle rail as positioning means. The locking part and the locking part that lock at the position that matches the insertion hole of the boom eliminates the need for cumbersome positioning on the boom with a bar or the like. , Fast with respect to the boom, it can be and easily fix the bridle. For this reason, the present invention has an extremely significant effect, for example, the work time and labor for transporting the crane can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler traveling crane according to an embodiment of the present invention.

FIG. 2 is a detailed side cross-sectional view of a partially cut-away main part of a crawler traveling crane according to one embodiment of the present invention.
FIG.

FIG. 3 is a plan view showing a guide rail and a support bracket of the crawler traveling crane according to one embodiment of the present invention.

FIG. 4 is a side view showing a guide rail and a support bracket of the crawler traveling crane according to one embodiment of the present invention.

FIG. 5 is a partially cutaway plan view showing a back surface of a base side boom of the crawler traveling crane according to one embodiment of the present invention.

FIG. 6 is a detailed side sectional view of a part of a crawler-type traveling crane according to an embodiment of the present invention, showing a state where a guide rail is flipped up and a bridle is locked, which is AA in FIG. 5; It is a line sectional arrow view.

FIG. 7 is a detailed sectional side view of a main portion of the crawler-type traveling crane according to one embodiment of the present invention, showing a state in which the bridle is fixed with a lock pin, taken along line AA of FIG. 5; FIG.

FIG. 8 is a side view showing a trailer mounted state of a conventional crawler type traveling crane.

[Explanation of symbols]

 5 Bridle 6 Base boom 9, 9 Lock pin insertion hole of bracket 10 Lock pin insertion hole of both sides of bridle 38, 38 Rail 39 Guide rail (guide means) 40A Engagement part (positioning means) 40B Locking part (positioning) means)

Claims (1)

[Claims] An upper revolving structure is mounted on a lower traveling structure which is rotatable by rotation of a crawler, and a crane boom is pivotally supported on a front portion of the upper revolving structure while a crane boom is pivotably supported on a lower portion thereof. A gantry and a boom elevating winch are installed to elevate the crane boom, a bridle is attached to a pendant rope attached to the end of the boom, and a bail is attached to the gantry and the boom is raised from the winch. A crawler-type traveling crane having a rope wound around each of the pulleys of the bridle and the bail and having its tip end moored to a fixed system such as an upper revolving structure, wherein the bridle approaching the back of the boom by extending the boom elevating rope. A bracket is fixed to both sides of the back of the boom to support and fix the boom to the back of the boom. A lock pin insertion hole is opened to support and fix the bridle to the bracket by inserting a lock pin into the portion, and further, a guide means for guiding the bridle between the brackets on the back of the boom and a bridle are inserted into the lock pin insertion hole of the bracket. A positioning means for aligning the lock pin insertion holes with each other and positioning the lock pin insertion holes in the crawler type traveling crane.