JP2000053379A - Rope guide device for crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rope guide device for a crane eliminating mounting and removing works at the time of a transportation and improving workability. SOLUTION: Roller mounting members 14R, 14L are fixed to a substructure members 3a3 of a lower surface part of a base end boom and supporting brackets 15R, 15L are rotatably provided on the roller mounting members 14R, 14L. A guide roller 16 is rotatably supported on the supporting brackets 15R, 15L. The supporting brackets 15 are fixed to either one of a supporting location projecting the guide roller 16 to a lower side of a lower surface of the base end boom and a storing location located upward (downward) of the lower surface of the base end boom by a pin 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope guide provided on a boom of a crane for preventing a wire rope fed from a winch device of a main body (for example, a winching device of a hydraulic tag line) from coming into contact with the boom. Related to the device.

[0002]

2. Description of the Related Art A crane is provided with a lattice structure boom made of steel pipe or the like in a main body so as to be able to ascend and descend, pulls out a wire rope from a winch device mounted on the main body, suspends the wire rope from the top of the boom, The hanging load is hung on the hook provided at the tip of the wire rope to perform the cargo handling operation. The boom includes a base boom having a base portion tapered in the height direction connected to the main body with a pin and having a dimension in the height direction expanding toward the other end portion, and a second end portion of the base boom. A connecting boom that is connected and has no dimensional change in the height direction and a tip boom that is connected to the other end of the connecting boom and that is tapered in the height direction.

[0003] A wire rope fed out from a suspended load lifting winch device provided on the main body is guided along guide base sheaves, connecting booms, and guide sheaves and point sheaves provided at the distal end portion of the distal end boom along the back surface of the distal end boom. The wire rope contacts the structural members on the back of the boom with the dimensional changes in the height direction of the base boom, the connecting boom, and the tip boom. The rope itself may be damaged. Therefore, conventionally, in order to prevent contact between the wire rope and the boom, a rope guide device as described in Japanese Utility Model Laid-Open No. 7-35483 is used. This rope guide device is provided with a cylindrical guide roller member rotatably provided in the width direction on the back surface of the boom, and rotates by contact with the wire rope to prevent the wire rope from contacting the boom. And to prevent boom damage.

[0004]

The above-mentioned crane is
When transporting a large aircraft, the base boom,
The connecting boom and the tip boom may be removed and transported. The above-described rope guide device protrudes from the back of the boom and is provided in the width direction. In the disassembling operation at the time of transportation, the rope guide device may collide with an obstacle or the like and cause damage. For this reason, a removal operation is required, but since it is attached to the boom by a fixing tool such as a U-bolt, the removal operation is troublesome and deteriorates workability.

In recent years, a so-called leaving winch device provided on a main body of a crane for assembling a wire rope suspended from a leading end of an assembled boom when assembling a wire rope in a winch device for lifting and lowering a suspended load of the main body. The wire rope of the winch device for lifting a hoisting load is drawn out by an auxiliary rope called into the auxiliary winch device. Since the auxiliary rope extended from the auxiliary winch device is drawn from the lower surface of the boom toward the boom tip, the auxiliary rope may come into contact with the structural member of the boom as described above. For this reason, a rope guide device is also used on the lower surface of the boom. However, during disassembly during transportation, the boom removed from the main body may be temporarily grounded to the ground. In this case, if the rope guide device is forgotten to be removed, the rope guide device projecting from the lower surface of the boom may be damaged. is there.

An object of the present invention is to provide a rope guide device of a crane which can prevent damage to the rope guide device during disassembly / assembly work during transportation or the like.

[0007]

A description will be given with reference to FIGS. (1) The first aspect of the present invention relates to a rope guide device of a crane which is provided across the width direction of the crane boom 3 and guides a wire rope 8 arranged in the longitudinal direction of the crane boom 3 by a guide roller 16. Applied. The guide roller swings between a storage position located inside the outer surface of the crane boom 3 and a support position protruding beyond the outer surface of the crane boom 3, and is held in one of the postures. The above object is achieved by providing a mounting means for mounting 16 to the crane boom 3. For example, in the disassembling operation of the crane, by moving the guide roller 16 to the storage position located inside the outer surface of the boom 3 by the attaching means, the guide roller 16 is prevented from coming into contact with an obstacle or the like. At the same time, since it is not necessary to remove the rope guide device 10 from the boom 3, workability can be improved. (2) According to the invention of claim 2, in the rope guide device of claim 1, the structural member 3a3 of the crane boom 3 so that the mounting means does not protrude from the outer surface of the crane boom 3.
The fixing members 14R and 14L provided on the
Support members 15R and 15L for supporting the first and second fixing members 14R and 14L in a swingable manner, and the swing support members 15R and 15R.
15L is fixed at the storage position or the support position.
4L and a positioning member 23 for positioning with respect to 4L. (3) According to the invention of claim 3, in the rope guide device of claim 1, the structural member 3a3 of the crane boom 3 so that the mounting means does not protrude from the outer surface of the crane boom 3.
The fixing members 30R and 30L provided on the
Supporting members 31R and 31L for supporting the first and second fixing members 30R and 30L in a swingable manner, and the swing supporting members 31R and 31R.
31L is normally biased toward the support position, and when a load greater than the biasing force is applied to the swing support members 31R, 31L, the swing support members 31R, 31L are allowed to swing to the storage position. It is composed of members 34R and 34L. When an obstacle comes into contact with the guide roller 16 during the disassembling operation, the swing supporting members 31R and 31L are moved by the urging members 34R and 34R.
The guide roller 16 is moved to a storage position located inward of the outer surface of the boom 3 against 34L. Therefore, it is possible to prevent the guide roller 16 from being damaged, and during the crane operation, the swinging supporting members 31R, 31L are urged by the urging members 34R, 34L, so that the guide roller 16 is in the support position. The wire rope 8 is supported by 16. (4) According to a fourth aspect of the present invention, in the rope guide device according to any one of the first to third aspects, the mounting means is provided on a lower surface of the crane boom. For example, even when the boom 3 is placed on the ground during the disassembling operation, the guide roller 16 can be moved inward from the outer surface of the boom 3 to prevent the guide roller 16 from being damaged. Workability can be improved. In the above-described section for solving the problems of the invention, the invention has been described with reference to the drawings of the embodiments, but the invention is not limited to the embodiments.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of a rope guide device according to the present invention will be described with reference to FIGS. FIG. 1 is a partial side view of a crane to which a rope guide device for a crane of the present invention is applied. FIG. 2 is an enlarged view showing the rope guide device of the crane of the present invention, and is a view as seen in the direction of arrow A in FIG. 3 is a view in the direction of arrow B in FIG. 2, and FIG. 4 is a state explanatory view showing a state in which the rope guide device in FIG. 3 is stored.

In FIG. 1, 1 is a crawler type traveling body, 2 is a revolving body provided on the traveling body 1 so as to be pivotable,
Reference numeral 3 denotes a lattice structure boom provided at the front of the revolving unit 2 so as to be able to move up and down. The boom 3 includes a base boom 3a pivotally supported by the revolving unit 2, a connecting boom 3b connected to the distal end of the base boom 3a, and a distal boom (not shown) provided at the distal end of the connecting boom 3b. . Base end boom 3
a, the connecting boom 3b, and the distal end boom are respectively located at four corners and extend in the longitudinal direction and the main structural members 3a1, 3a2 and the sub structural member 3a3 bridged between the main structural members 3a1, 3a2 (only the base end boom 3a is shown). ). Reference numeral 4 denotes a back stay, one end of which is connected to the revolving superstructure 2 and the other end of which is connected to the structural member 3a1 on the rear side of the base end boom 3a. The back stay 4 tilts the boom 3 backward by a predetermined angle or more. To prevent Reference numeral 5 denotes a main winding winch provided on the revolving unit 2, and winds and unwinds a main winding rope 6 connected to a hook suspended from the top of the boom 3 (the end of the end boom). Reference numeral 7 denotes an auxiliary winch for feeding in and feeding out the auxiliary rope 8. The auxiliary rope 8 to be fed out is connected to the main winding rope 6 to be drawn out from the main winding winch 5 via the end of the boom 3, and the auxiliary rope 8 is drawn in. By doing
When the boom 3 is assembled, the main winding rope 6 is guided to the top of the boom 3. 9 is a guide roller attached to the main structural member on the back of the connecting boom, which prevents the main winding rope 6 from contacting the base end boom 3a and the connecting boom 3b.

Reference numeral 10 denotes a rope guide device according to the present invention provided on the structural member 3a2 on the lower surface of the base end boom 3a. The auxiliary rope 8 extended from the auxiliary winch 7 includes the base end boom 3a and the connecting boom 3b. , And will be described in detail below.

The rope guide device 10 is shown in FIGS.
As shown in (a) and (b), the sub-structure member 3a3 which is bridged between the pair of main structure members 3a2 of the base end boom 3a.
A boom attachment member 11 attached by a U bolt 12 and a nut 13, a pair of roller attachment members 14R and 14L fixed to both ends of the boom attachment member 11, and a core member 19 passing through the center of a cylindrical pipe member. Roller 16
And both ends of the roller 16 are rotatably supported,
Each of the roller mounting members 14R, 14L is
A pair of support brackets 15 rotatably attached to
R, 15L. Support bracket 15R, 15L
Are provided with pin holes 20 for fixing the support brackets 15R, 15L to the roller mounting members 14R, 14L. The roller mounting members 14R, 14L
The pin hole 21 for fixing the pin 6 at a rope support position protruding downward from the lower surface of the main structural member 3a2 as shown in FIG. 3A, and the main structural member as shown in FIG. A pin hole 22 for fixing a pin at a storage position where it is accommodated inward from the lower surface of 3a2 (a position not protruding downward from the main structural member 3a2) is formed. Then, the positions of the pin holes 20 and 21 are aligned, and
By inserting the roller 3, the roller 16 is fixed at the rope supporting position, and the positions of the pin holes 20 and 22 are aligned.
By inserting the pins 23 into them, they are fixed in the storage position. In addition, 24 is a beta pin as a stopper for preventing the pin 23 from coming off, 25 is a pin hole through which the pin 17 formed in the support bracket 15R, 15L passes, and 26 is a pin hole formed through the roller mounting members 14R, 14L. It is a pin hole.

Next, the operation of the thus configured rope guide device of the first embodiment will be described. First, in the setup operation of the crane (preparation operation of the crane main body before the start of the operation), the base end boom 3a is connected to the revolving unit 2,
The connecting boom 3b and the distal end boom (not shown) are sequentially connected to the base end boom 3a. The pair of left and right support brackets 15R and 15L of the rope guide device 10 are fixed by the pins 23 at the rope support position as shown in FIGS.
Then, the auxiliary rope 8 is extended from the auxiliary winch 7 of the revolving unit 2 and connected to the main winding rope 6 extended from the main winding winch 5 via the end of the boom 3 (the end of the end boom). Then, the auxiliary winch 7 is retracted and the auxiliary rope 8 is retracted into the auxiliary winch 7. When the auxiliary rope 8 is retracted into the auxiliary winch 7, the main winding rope 6 is pulled out from the main winding winch 5, wrapped around a sheave provided on the distal end boom, and guided to near the lower surface of the base end boom 3a. You. At this time, the roller 1
The auxiliary rope 8 is guided by the rotation of the core 6 around the core member 19, and the contact with the connecting boom 3b and the proximal end boom 3a is prevented. Thereby, the auxiliary rope 8, the tip boom,
Damage to the connecting boom 3b and the proximal boom 3a is prevented.

When the crane operation is completed and the crane is disassembled for transportation or the like, the main winding rope 6 is fed into the main winding winch 5, and then the front end boom, the connecting boom 3b, and the base end boom 3a are connected. Are sequentially disconnected, and the base end boom 3a is removed from the revolving unit 2, but before that, the roller mounting member 14
The roller 23 is moved to the storage position by removing the pin 23 connecting the R, 14L and the support bracket 15R, 15L, and rotating the support bracket 15R, 15L at the rope support position in the direction of the arrow in FIG. Then, the pins 23 are inserted into the pin holes 22 of the roller mounting members 14R and 14L and the pin holes 20 of the support brackets 15R and 15L and fixed. As a result, the roller 16 is fixed at the storage position. In this state, the base end boom 3a is detached from the revolving superstructure 2, and is placed on the bed of the trailer during transportation. In this case, since the roller 16 is at the storage position described above, the weight of the base end boom 3a does not act on the roller 16, so that the damage of the roller 16 can be prevented and the base end boom 3a can be placed on the bed of the trailer. When placing, the entire bottom surface of the base end boom 3a can be put on the trailer platform without the need for a block or the like to protect the roller 16, so that it can be placed stably and transportability is improved. I do.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the support brackets 15R and 15L in the above-described first embodiment are fixed at the rope support positions by springs, and will be described in detail below. The same components as those in the first embodiment are denoted by the same reference numerals, and differences will be mainly described.

5 and 6, the rope guide device 4
The roller mounting members 30R and 30L and the support brackets 31R and 31L respectively have spring mounting pins 32.
R, 32L, 33R, and 33L are provided so as to protrude, between the spring mounting pins 32R and 33R, and between the spring mounting pins 32R and 33R.
Springs 34R and 34L are provided between 2L and 33R so as to connect them. And the spring 34R,
34L constantly urges the support brackets 31R and 31L toward the rope support position, and maintains the state shown in FIG.
The support brackets 31R and 31L abut against a stopper (not shown) so that the support brackets 31R and 31L are slightly inclined at the rope support position in FIG. Also, the mounting pins 32R, 33
Since the springs 34R and 34L are mounted between R and 32L and 33L, the posture of the supporting position is maintained when the auxiliary rope 8 is in contact with the roller 16. That is, the spring 3
4R and 34L are spring forces sufficiently opposed to the drag force of the rope tension. On the other hand, when a load equal to or greater than the rope tension acts on the roller 16 such as when the base end boom 3a is placed on the bed of a trailer, the support brackets 31R and 31L are retracted against the spring force of the springs 34R and 34L. Rotate toward the position to prevent breakage of the rope guide device.

The rope guide device according to the second embodiment configured as described above has the following operation and effects in addition to the effects of the above-described first embodiment. The roller 16 always holds the rope supporting position by the springs 34R and 34L. Even when the auxiliary rope 8 is in contact with the roller 16 during a crane setup operation or the like, the roller 16 remains
The ropes 34R and 34L guide them while maintaining the rope support position. When the base boom 3a is detached from the revolving superstructure 2 during transportation or the like and the base boom 3a is placed on the ground or on the bed of a trailer, the support brackets 31R and 31L apply the spring force of the springs 34R and 34L. , The rope guide device 40 can be prevented from being damaged, and the work of fixing the roller 16 to the storage position and fixing the roller 16 to the operation position is not required, thereby improving workability. .

The support brackets 31R and 31L are
Since the base end boom 3a is slightly inclined in the rotation direction at the working position, the base end boom 3a smoothly moves toward the storage position when the weight of the base end boom acts.

In the first and second embodiments described above, the case where the rope guide devices 10 and 40 are provided on the lower surface of the base end boom 3a has been described. However, the present invention is not limited to this.
For example, it is also possible to provide on the upper surface of the boom 3,
The guide roller 9 in FIG. 1 may be used as the rope guide devices 10 and 40. In this case, the rope guide of the wire rope 6 is also used.

The correspondence between each component of the above embodiment and the configuration of the claims is as follows. The roller mounting members 14R, 14L, 30R, 30L serve as fixing members, and the support brackets 15R, 15L, 31R, 31L.
Is the swing support member, the pin 23 is the positioning member, and the spring 3
4R and 34L constitute urging members, respectively.

[0020]

According to the rope guide device of the present invention,
Since the guide roller can be moved between a storage position located inside the outer surface of the boom and a support position protruding beyond the outer surface of the boom, for example, when disassembling and transporting the boom, the boom is mounted on a trailer carrier or the like. The guide roller can be located at the storage position when it is placed, and the guide roller is not damaged. In addition, by storing the guide rollers in the storage position located inside the outer surface of the boom, even if the boom is placed on the trailer carrier, almost the entire surface of the boom can be grounded, improving stability. it can. Further, if the guide roller is biased to the supporting position by the biasing means, it is not necessary to fix the guide roller at the storage position and the supporting position, and the workability is improved.

[Brief description of the drawings]

FIG. 1 is a partial side view of a crane to which a rope guide device of a crane according to the present invention is applied.

FIG. 2 is an arrow view of the rope guide device according to the first embodiment of the present invention as viewed from a direction A in FIG. 1;

3A is a view in the direction of arrow B in FIG. 2, and FIG. 3B is an exploded perspective view.

FIG. 4 is an explanatory diagram of a state in FIG. 3;

FIG. 5 is a view corresponding to FIG. 2, showing a second embodiment of the rope guide device of the crane of the present invention.

FIG. 6 is a view in the direction of arrow C in FIG. 5;

[Explanation of symbols]

3a: proximal end boom 3a1, 3a2,
3a3: Boom structural member 11: Boom mounting member 14R, 14L, 30R,
30L: Roller mounting member 15R, 15L, 31R, 31L: Support bracket
16: Roller 17: Pin 34R,
34L: Spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shino Kamata 650, Kandamachi, Tsuchiura-shi, Ibaraki F-term in the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd.

Claims (4)

[Claims] 1. A crane rope guide device provided across a width direction of a crane boom and guiding a wire rope disposed in a longitudinal direction of the crane boom by a guide roller, wherein the crane boom has an outer surface. Attachment means for attaching the guide roller to the crane boom such that the guide roller swings between a storage position located inward and a support position protruding from an outer surface of the crane boom and is held in one of the postures. A rope guide device for a crane, comprising: 2. The rope guide device according to claim 1, wherein the mounting means includes: a fixing member provided on a structural member of the crane boom so as not to protrude from an outer surface of the crane boom; and the guide roller is attached to the fixing member. A rope guide for a crane, comprising: a swing support member that swingably supports the swing support member; and a positioning member that positions the swing support member with respect to the fixed member at the storage position or the support position. apparatus. 3. The rope guide device according to claim 1, wherein the attaching means includes: a fixing member provided on a structural member of the crane boom so as not to protrude from an outer surface of the crane boom; A swing support member that swingably supports the swing support member; and a biasing member that constantly biases the swing support member toward the support position, and when a load greater than the biasing force is applied to the swing support member, the swing support member is supported. A biasing member that allows the member to swing to the storage position. 4. A rope guide device for a crane according to claim 1, wherein said attachment means is provided on a lower surface of said crane boom.