JP7136161B2 - Connection mechanism and connection method - Google Patents

Description

The present invention relates to a coupling mechanism and a coupling method.

Since relatively large cranes are heavy, they are disassembled into a plurality of assembly units, and each assembly unit is loaded on a trailer or the like and transported. Therefore, this crane needs to be disassembled and assembled at the work site.

As an assembly unit for such a crane, a unit in which a lower spreader and an upper spreader are integrally held has been proposed (see JP-A-2016-222397 and JP-A-2012-116605).

JP 2016-222397 A JP 2012-116605 A

Patent Document 1 describes an assembly unit in which a tower jib bridle (upper spreader) is integrally fixed to a tower jib bail (lower spreader) mounted on a tower boom base. In Patent Document 1, the tower jib hoisting rope is hung between the tower jib bail and the tower jib bridle, and the tower jib bridle is suspended and held by an auxiliary crane, and the tower jib hoisting rope is provided on the main frame. It describes bringing the tower jib bridle into close proximity with the tower jib bail by winding it up with a tower jib luffing drum, and securing the two together with pins.

Patent Document 2 describes that a bridle unit (upper spreader) and a bail unit (lower spreader) are brought closer to each other and integrated together by winding a boom hoisting rope with a hoisting winch when a crane is transported. there is Patent Document 2 describes moving a bridle unit and a bail unit by suspending them with an auxiliary crane.

In Patent Documents 1 and 2, by integrally fixing a lower spreader and an upper spreader in a state in which a jib hoisting rope is wound around, handling of the assembly unit is improved, and this assembly unit is used. It is described to facilitate the assembly of construction machinery. Conventionally, the lower spreader and the upper spreader are connected by winding a jib luffing rope, as described in US Pat. Further, as described in Patent Document 1, the connection between the lower spreader and the upper spreader is performed while the upper spreader is suspended by an auxiliary crane.

However, the lower and upper spreaders are heavy with multiple sheaves each. Further, the work of connecting the lower spreader and the upper spreader is often done at a high place. Therefore, it is not easy to align the lower spreader and the upper spreader with the upper spreader suspended by the auxiliary crane.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a connecting mechanism that can easily and reliably align a lower spreader and an upper spreader when connecting the two.

A connection mechanism according to an aspect of the present invention includes a boom, a hoisting winch mounted on the boom, and a first sheave over which a hoisting rope drawn out from the hoisting winch is stretched, and is mounted on the boom. and an upper spreader having a second sheave around which the hoisting rope is wound around between the first sheave and the lower spreader and the upper spreader, wherein the The boom is provided with a guide rail capable of guiding the upper spreader to a connecting position with the lower spreader by winding the hoisting rope by the hoisting winch.

A connection mechanism according to an aspect of the present invention can easily and reliably align the lower spreader and the upper spreader when connecting the two.

FIG. 1 is a schematic side view showing a construction machine according to one embodiment of the invention. 2 is a schematic perspective view showing a connecting mechanism of the lower spreader and the upper spreader in the construction machine of FIG. 1. FIG. 3 is a schematic side view of the lower spreader of FIG. 2 and a support connected to the lower spreader; FIG. 4 is a schematic side view of the upper spreader of FIG. 2; FIG. FIG. 5 is a schematic side view showing a procedure for connecting the lower spreader and the upper spreader of FIG. 2; FIG. 6 is a schematic side view of the lower spreader and upper spreader of FIG. 2 showing the subsequent connection procedure of FIG. 5;

[Description of the embodiment of the present invention]
First, embodiments of the present invention will be listed and described.

A connection mechanism according to an aspect of the present invention includes a boom, a hoisting winch mounted on the boom, and a first sheave over which a hoisting rope drawn out from the hoisting winch is stretched, and is mounted on the boom. and an upper spreader having a second sheave around which the hoisting rope is wound around between the first sheave and the lower spreader and the upper spreader, wherein the The boom is provided with a guide rail capable of guiding the upper spreader to a connecting position with the lower spreader by winding the hoisting rope by the hoisting winch.

The connection mechanism moves the upper spreader on the guide rail by winding the hoisting rope by the hoisting winch, thereby easily and reliably guiding the upper spreader to a position where it is connected to the lower spreader. can. Therefore, when connecting the lower spreader and the upper spreader, the connecting mechanism can easily and reliably align the two.

The lower spreader and the upper spreader have connecting portions that interfere with each other so as to stop the movement of the upper spreader at the connecting position, and pin holes that overlap each other at the connecting position, and the connecting mechanism includes the pin. A coupling pin that is inserted into the hole may also be provided. In this way, the lower spreader and the upper spreader have connecting portions that interfere with each other so as to stop the movement of the upper spreader at the connecting position, and pin holes that overlap each other at the connecting position. By moving the spreader on the guide rail to a contact position with the lower spreader, the pin holes provided in the lower spreader and the pin holes provided in the upper spreader overlap. Therefore, the connecting pins can be easily inserted into the pin holes that overlap each other, and the lower spreader and the upper spreader can be easily and reliably connected.

The boom includes a lower boom on which the luffing winch is mounted, a first intermediate boom connected to the lower boom, and a second intermediate boom detachably connected to the first intermediate boom, and A spreader may be mounted on the first intermediate boom, and the guide rail may be provided on the second intermediate boom. Thus, the boom comprises a lower boom on which the hoisting winch is mounted, a first intermediate boom connected to the lower boom, and a second intermediate boom detachably connected to the first intermediate boom. The lower spreader is mounted on the first intermediate boom, and the guide rail is provided on the second intermediate boom, so that the lower spreader and the upper spreader can be easily connected. At the same time, the lower spreader and the upper spreader connected to each other can be handled as one assembly unit together with the lower boom and the first intermediate boom. As a result, transportation and assembly of the construction machine can be facilitated.

A connection method according to another aspect of the present invention includes a boom, a hoisting winch mounted on the boom, and a first sheave over which a hoisting rope drawn out from the hoisting winch is stretched, and A method for connecting the lower spreader and the upper spreader in a construction machine comprising a mounted lower spreader and an upper spreader having a second sheave around which the hoisting rope is wound around the first sheave, and guiding the upper spreader to a connecting position with the lower spreader on the guide rail by winding the hoisting rope by the hoisting winch.

The connecting method can easily and reliably guide the upper spreader to the connecting position with the lower spreader by moving the upper spreader on the guide rail in the guiding step. Therefore, the connecting method can easily and reliably align the lower spreader and the upper spreader when connecting the two.

[Details of the embodiment of the present invention]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
<Coupling mechanism>
The connecting mechanism is a connecting mechanism of the lower spreader 1 and the upper spreader 2 in the construction machine 10 of FIG. The construction machine 10 includes a crane. The construction machine 10 includes a lower traveling body 3, an upper revolving body 4 horizontally rotatably mounted on the lower traveling body 3, and a hoisting member 5 attached to the upper revolving body 4 so as to be able to rise and fall. The hoisting member 5 includes a boom 6 that is hoistably attached to the upper rotating body 4, a jib 7 that is hoistably connected to the tip of the boom 6, and a triangular ring that is connected to the tip of the boom 6 and to the rear of the jib 7. of struts 8. The boom 6 includes a lower boom 11 detachably attached to the upper revolving body 4 at its base end, a first intermediate boom 12 connected to the tip of the lower boom 11, and detachable to the tip of the first intermediate boom 12. and one or more second intermediate booms 13 operably connected thereto. The jib 7 is formed, for example, by connecting a plurality of partial jibs in the longitudinal direction. The strut 8 includes a front strut 8 a extending rearward from the tip of the boom 6 toward the jib 7 , and a rear strut 8 b extending rearward from the tip of the boom 6 toward the boom 6 . The construction machine 10 also includes a strut guy line 14 connecting the tip (rear end) of the rear strut 8b and the upper spreader 2, and the tip of the jib 7 and the tip (rear end) of the front strut 8a. and a jib guy line 15 to be connected. Construction machine 10 is itself an embodiment of the present invention. The specifications of the construction machine 10 are not particularly limited, and various specifications such as luffing specifications, tower specifications, and crane specifications can be used. The "base end" of the boom refers to the side of the construction machine that is connected to the upper rotating body, and the "tip" refers to the opposite side.

The connecting mechanism is a mechanism for connecting the lower spreader 1 and the upper spreader 2 when disassembling the construction machine 10 of FIG. 1 into a plurality of units. More specifically, the connecting mechanism connects the upper spreader 2 to the lower spreader 1 as shown in FIG. is the mechanism of

As shown in FIGS. 1 and 2, the connection mechanism includes a hoisting winch (jib hoisting winch 21) mounted on the boom 6 and a hoisting rope (jib hoisting rope 22) drawn out from the jib hoisting winch 21. A lower spreader 1 having a first sheave 23 to be passed over and mounted on a boom 6, and an upper spreader 2 having a second sheave 24 around which a jib hoisting rope 22 is hung between the first sheave 23. Prepare. The boom 6 is provided with a guide rail 25 capable of guiding the upper spreader 2 to the connection position with the lower spreader 1 by winding the jib hoisting rope 22 by the jib hoisting winch 21 .

The configuration of each part of the coupling mechanism will be described below with reference to FIGS. 1 to 4. FIG.

(lower boom)
The lower boom 11 has a lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders. The lower boom 11 is arranged in a V shape so that the main girders adjacent to each other in the undulating direction are spaced apart from each other from the base end side to the tip end side while being attached to the upper swing body 4 . The lower boom 11 has a connecting hole (not shown) that penetrates in the width direction at the base end. The lower boom 11 is attached to the upper revolving body 4 through this connecting hole so as to be able to rise and fall.

(jib hoisting winch)
A jib hoisting winch 21 is mounted on the lower boom 11 .

(1st intermediate boom)
The first intermediate boom 12 is detachably connected to the tip side of the lower boom 11 . The first intermediate boom 12 includes a main body 26 having a rectangular tubular lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders, and tip portions of a pair of adjacent main girders. and a support portion 27 which is attached between the lower spreader 1 and supports the lower spreader 1 so as to be rotatable in the hoisting direction of the boom 6 . The support portion 27 is arranged on the back side of the main body 26 (the side on which the boom 6 is laid down in the construction machine 10). The support portion 27 includes a pair of brackets 27a attached to the main body 26 so as to face each other in the width direction of the boom 6, a guide sheave 27b rotatably connected to the pair of brackets 27a, and the lower spreader 1 rotatably. and a shaft portion 27c to be supported.

(lower spreader)
A lower spreader 1 is mounted on a first intermediate boom 12 . Specifically, the lower spreader 1 is directly connected to the support portion 27 and connected to the main body 26 via the support portion 27 . Thereby, the lower spreader 1 is configured to be arranged on the back surface of the second intermediate boom 13, more specifically on the guide rail 25 while being connected to the support portion 27, as shown in FIG.

As shown in FIGS. 2 and 3, the lower spreader 1 includes a pair of brackets 1a facing each other in the width direction of the boom 6, and a first sheave 23 rotatably connected to the pair of brackets 1a. A pair of brackets 1a are elongated plates. The pair of brackets 1a is rotatably connected to the shaft portion 27c of the support portion 27 at the end portion on the base end side in the longitudinal direction.

The lower spreader 1 has a first connecting portion 1b that interferes with the upper spreader 2 so as to stop the movement of the upper spreader 2 at the connecting position (position shown in FIG. 2) with the upper spreader 2, and the upper spreader 2 at the connecting position. It has a pin hole 2d and a pin hole 1c which overlap with each other. Further, the lower spreader 1 has projections 1d supported by support bases 28b of guide rails 25, which will be described later. The first connecting portions 1b are provided at the ends of the pair of brackets 1a on the tip side, respectively. The pin holes 1c are provided near the first connecting portions 1b of the pair of brackets 1a, respectively. The protrusions 1d protrude from the lower edges of the pair of brackets 1a. Coupling pins 29 are inserted into the overlapping pin holes 1c and 2d.

(2nd intermediate boom)
The second intermediate boom 13 has a rectangular tubular lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders.

(guide rail)
A guide rail 25 is provided on the second intermediate boom 13 . The guide rails 25 are configured to support the lower spreader 1 and guide the upper spreader 2 to a connecting position with the lower spreader 1 . As shown in FIG. 2 , the guide rail 25 is attached between a pair of adjacent main girders of the second intermediate boom 13 . The guide rail 25 extends in the longitudinal direction of the second intermediate boom 13 . The guide rail 25 is arranged behind the second intermediate boom 13 .

The guide rail 25 has a pair of rail members 28 a extending parallel to the longitudinal direction of the second intermediate boom 13 and a pair of support bases 28 b supporting the projections 1 d of the lower spreader 1 . The pair of support base portions 28b are provided on the pair of rail members 28a. The guide rail 25 holds the lower spreader 1 on the guide rail 25 by supporting the projections 1d of the lower spreader 1 with the pair of support bases 28b.

(upper spreader)
As shown in FIGS. 2 and 4, the upper spreader 2 includes a pair of brackets 2a facing each other with a gap in the width direction of the boom 6, and a second sheave 24 rotatably connected to the pair of brackets 2a. , and a connecting bar 2b connected to the pair of brackets 2a. The pair of brackets 2a has a substantially long plate shape with the longitudinal direction facing the lower spreader 1. As shown in FIG.

The upper spreader 2 has a second connecting portion 2c that interferes with the first connecting portion 1b of the lower spreader 1 so as to stop the movement of the upper spreader 2 at a connecting position with the lower spreader 1, and a second connecting portion 2c that interferes with the lower spreader 1 at the connecting position. It has a pin hole 2d that overlaps with the provided pin hole 1c. The second connecting portion 2c is provided at each end portion on the base end side of the pair of brackets 2a. 2 d of pin holes are provided in the 2nd connection part 2c of a pair of bracket 2a, respectively. Also, the upper spreader 2 has a guy line connection portion 2 e that is connected to the above-described strut guy line 14 in the construction machine 10 at the end opposite to the side adjacent to the lower spreader 1 .

The upper spreader 2 is arranged on a pair of rail members 28a, and a rotating roller 2f configured to be rotatably movable on these rail members 28a. on rail member 28a.

The second connecting portion 2c is formed when the upper spreader 2 is brought closer to the lower spreader 1 side by winding the jib hoisting rope 22 while the rotating roller 2f is arranged on the rail member 28a. It has a contact portion that contacts the first connecting portion 1b, and a covering portion that covers the side of the bracket 1a of the lower spreader 1 while the contact portion is in contact with the first connecting portion 1b. A pin hole 2d is provided in this covering portion.

<Connection method>
Next, a method of connecting the lower spreader 1 and the upper spreader 2 will be described with reference to FIGS. The connection method has a boom 6, a jib hoisting winch 21 mounted on the boom 6, and a first sheave 23 over which a jib hoisting rope 22 drawn out from the jib hoisting winch 21 is stretched, and is mounted on the boom 6. and an upper spreader 2 having a second sheave 24 between which a jib hoisting rope 22 is wound around a first sheave 23, and a guide rail 25 is provided on a boom 6. 1 is a method of connecting the lower spreader 1 and the upper spreader 2 in the construction machine 10 of 1. FIG. The connection method includes a step (guidance step) of guiding the upper spreader 2 to the connection position with the lower spreader 1 on the guide rail 25 by winding the jib hoisting rope 22 with the jib hoisting winch 21 . In addition, the connection method includes a step of lowering the jib 7 (lowering step), and a step of suspending the upper spreader 2 by the auxiliary crane X after the lowering step, and releasing the connection between the upper spreader 2 and the strut guy line 14. (Releasing step), and a step of inserting the coupling pin 29 into the pin hole 1c of the lower spreader 1 and the pin hole 2d of the upper spreader 2 after the guiding step (connecting step).

(lodging process)
In the laying down process, as shown in FIG. 5, the jib 7 is removed except for the partial jib 7a on the base end side, and the boom 6 is laid down so that the partial jib 7a is bent downward and touches the ground. It should be noted that the specific procedure of this lodging process can be changed according to the specifications of the construction machine. For example, in the case of a crane specification that does not have a jib 7, it is not necessary to disconnect the jib, and it is only necessary to lower the boom forward.

(Release process)
In the releasing step, the connection between the upper spreader 2 and the strut guy line 14 is released while the upper spreader 2 is suspended by the auxiliary crane X, as shown in FIG. As a result, the upper spreader 2 is connected only to the lower spreader 1 via the jib hoisting rope 22 in the construction machine 10 .

(Induction process)
The induction step is performed subsequent to the release step. In the guiding step, the jib hoisting rope 22 is wound up by the jib hoisting winch 21 while the projection 1d of the lower spreader 1 is supported by the support base portion 28b of the guide rail 25 . In the guidance step, the upper spreader 2 is guided onto the guide rails 25 during the guidance process to the lower spreader 1 . In the guiding step, the upper spreader 2 is guided onto the guide rails 25 while sandwiching the rail member 28a with the leg portions 29g, and then the upper spreader 2 is further moved on the rail member 28a to bring it closer to the lower spreader 1. In the guiding step, when the upper spreader 2 reaches the connecting position with the lower spreader 1, the first connecting portion 1b of the lower spreader 1 and the second connecting portion 2c of the upper spreader 2 interfere with each other, and the upper spreader 2 stops. . At this time, since both the lower spreader 1 and the upper spreader 2 are arranged on the guide rails 25, the height positions of both are automatically adjusted, and the pin hole 1c of the lower spreader 1 and the pin of the upper spreader 2 are aligned. 2 d of holes coaxially overlap each other.

(Consolidation process)
In the connecting step, the coupling pins 29 are inserted into the pin holes 1c and 2d that overlap each other in the guiding step. As a result, the lower spreader 1 and the upper spreader 2 are connected on the guide rail 25 as shown in FIG.

<Advantages>
The connection mechanism moves the upper spreader 2 on the guide rail 25 by winding the jib hoisting rope 22 by the jib hoisting winch 21, thereby easily and reliably guiding the upper spreader 2 to the position where it is connected to the lower spreader 1. be able to. Therefore, when connecting the lower spreader 1 and the upper spreader 2, the connecting mechanism can easily and reliably align the two.

By moving the upper spreader 2 on the guide rail 25 to a contact position with the lower spreader 1, the connecting mechanism connects the pin holes 1c provided in the lower spreader 1 and the pin holes provided in the upper spreader 2. 2d overlaps. Therefore, the connecting mechanism can easily insert the connecting pin 29 into the mutually overlapping pin holes 1c and 2d, and can connect the lower spreader 1 and the upper spreader 2 easily and reliably.

In the connecting mechanism, the lower spreader 1 is mounted on the first intermediate boom 12 and the guide rail 25 is provided on the second intermediate boom 13, so that the upper spreader 2 and the lower spreader 1 can be easily connected. In addition, the lower spreader 1 and the upper spreader 2 connected to each other can be handled as one unit for assembly together with the lower boom 11 and the first intermediate boom 12 . As a result, transportation and assembly of the construction machine 10 can be facilitated.

Since the construction machine 10 includes the connecting mechanism, when connecting the lower spreader 1 and the upper spreader 2, they can be aligned easily and reliably.

The connecting method can easily and reliably guide the upper spreader 2 to the connecting position with the lower spreader 1 by moving the upper spreader 2 on the guide rails 25 in the guiding step. Therefore, when connecting the lower spreader 1 and the upper spreader 2, the connecting method can easily and reliably align the two.

[Other embodiments]
The above embodiments do not limit the configuration of the present invention. Therefore, in the above embodiment, the components of each part of the above embodiment can be omitted, replaced, or added based on the description of the present specification and common general technical knowledge, and all of them are interpreted as belonging to the scope of the present invention. should.

In the above embodiment, the configuration in which the jib hoisting winch is mounted on the lower boom, the lower spreader is mounted on the first intermediate boom, and the guide rail is provided on the second intermediate boom has been described. However, in the connection mechanism, the arrangement of the jib hoisting winch, the lower spreader and the guide rail is not particularly limited. Further, the specific configuration of the boom is not particularly limited, and a configuration that does not include one or more of the lower boom, the first intermediate boom, and the second intermediate boom is also possible. is.

In the embodiment described above, the configuration in which the lower boom, the first intermediate boom, and the second intermediate boom have a lattice structure has been described. However, the coupling mechanism can also employ a boom that does not have a lattice structure.

The configuration of the guide rail is not limited to the configuration described in the above embodiment. For example, the guide rail may consist of only one rail member. Moreover, the guide rail may be configured to be detachable from the boom.

The configurations of the lower spreader and the upper spreader are not limited to those described in the above embodiments. For example, the lower spreader and the upper spreader may not have connecting portions that interfere with each other at the connecting position. For example, the guide rail is provided with a stopper for stopping the movement of the upper spreader, and when stopped by this stopper, the pin holes provided in the lower spreader and the pin holes provided in the upper spreader are configured to overlap each other. may

A coupling mechanism according to an aspect of the present invention is suitable for improving the efficiency of crane disassembly and assembly work.

1 lower spreader 1a bracket 1b first connecting part 1c pin hole 1d projection 2 upper spreader 2a bracket 2b connecting bar 2c second connecting part 2d pin hole 2e guy line connecting part 2f rotating roller 2g leg part 3 lower running body 4 upper rotating body 5 Luffing member 6 Boom 7 Jib 7a Partial jib 8 Strut 8a Front strut 8b Rear strut 10 Construction machine 11 Lower boom 12 First intermediate boom 13 Second intermediate boom 14 Strut guy line 15 Jib guy line 21 Jib hoisting winch 22 Jib hoisting rope 23 First sheave 24 Second sheave 25 Guide rail 26 Main body 27 Support part 27a Bracket 27b Guide sheave 27c Shaft part 28a Rail member 28b Support base part 29 Connecting pin X Auxiliary crane

Claims (4)

boom and
a luffing winch mounted on the boom;
a lower spreader mounted on the boom, having a first sheave over which the hoisting rope drawn out from the hoisting winch is stretched;
an upper spreader having a second sheave around which the hoisting rope is wound around the first sheave; and
A coupling mechanism, wherein the boom is provided with a guide rail capable of guiding the upper spreader to a coupling position with the lower spreader by winding the hoisting rope by the hoisting winch. wherein the lower spreader and the upper spreader have connecting portions that interfere with each other to stop movement of the upper spreader at the connecting position and pin holes that overlap each other at the connecting position;
2. The coupling mechanism according to claim 1, further comprising a coupling pin inserted into said pin hole. the boom includes a lower boom on which the luffing winch is mounted, a first intermediate boom connected to the lower boom, and a second intermediate boom detachably connected to the first intermediate boom;
The lower spreader is mounted on the first intermediate boom,
3. The coupling mechanism according to claim 1, wherein said guide rail is provided on said second intermediate boom. boom and
a luffing winch mounted on the boom;
a lower spreader mounted on the boom, having a first sheave over which the hoisting rope drawn out from the hoisting winch is stretched;
A method for connecting the lower spreader and the upper spreader in a construction machine comprising: an upper spreader having a second sheave around which the hoisting rope is wound around the first sheave,
A guide rail is provided on the boom,
A connection method comprising the step of guiding the upper spreader to a connection position with the lower spreader on the guide rail by winding the luffing rope with the luffing winch.

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