JP2022042863A - Housing structure for upper spreader, assembly unit of construction machine, transportation method and housing method for upper spreader - Google Patents

Abstract

To provide a housing structure for an upper spreader that can improve efficiency of assembly and disassembly work of a construction machine.SOLUTION: A housing structure for an upper spreader according to one aspect of the present invention comprises: a lower boom; a jib derricking winch mounted on the lower boom; a first intermediate boom connected to the lower boom; and a lower spreader having a first sheave over which a jib derricking rope unwound from the jib derricking winch is stretched and mounted on the first intermediate boom; and an upper spreader having a second sheave over which the jib derricking rope is stretched from the first sheave. The jib derricking rope is wound by the jib derricking winch so that the lower spreader and the upper spreader are connected with each other and held integrally in a state where the jib derricking rope is stretched between the first sheave and the second sheave.SELECTED DRAWING: Figure 1

Description

The present invention relates to a storage structure for an upper spreader, an assembly unit for construction machinery, a transport method, and a storage method for the upper spreader.

Since a relatively large crane is heavy, it is disassembled into a plurality of assembly units, and each of these assembly units 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 Japanese Patent Application Laid-Open No. 2016-22239).

Japanese Unexamined Patent Publication No. 2016-22237

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, a tower jib undulating rope is hung between a tower jib bail and a tower jib bridle, and the tower jib undulating rope is wound by a tower jib undulating drum provided on a main frame to wind the tower jib bridle. Is described as being close to the tower jib bail and pinning both. Patent Document 1 describes that by fixing the tower jib bail and the tower jib bridle to each other, the tower jib bridle can be fixed to the tower boom base portion via the tower jib bail.

According to the configuration described in Patent Document 1, the tower jib bail and the tower jib bridle are fixed to each other, and then the tower jib bail and the tower jib bridle are separated by removing the tower jib undulating rope from the tower jib bail and the tower jib bridle. It can be separated from the main frame together with the tower boom base.

However, according to the configuration described in Patent Document 1, the tower jib undulating rope is removed from the tower jib bail and the tower jib bridle each time the crane is disassembled, and the tower jib undulating rope is attached to the tower jib bail and the tower jib bridle each time the crane is assembled. It is necessary to hang around.

Therefore, depending on the configuration described in Patent Document 1, it is difficult to sufficiently improve the efficiency of the disassembling and assembling work of the crane.

In view of the above inconvenience, it is an object of the present invention to provide a storage structure for an upper spreader capable of improving the efficiency of disassembling and assembling work of a construction machine.

The storage structure of the upper spreader according to one aspect of the present invention made to solve the above-mentioned problems is connected to the lower boom, the jib undulating winch mounted on the lower boom, and the first lower boom. It has an intermediate boom and a first sheave on which a jib undulating rope unwound from the jib undulating winch is hung, and a lower spreader mounted on the first intermediate boom and the jib undulating rope are the first sheave. The lower spreader and the upper spreader are provided with an upper spreader having a second sheave to be hung between the two, and the jib undulating rope is wound by the jib undulating winch so that the jib undulating rope becomes the first. They are connected to each other and held integrally in a state of being hung between the 1 sheave and the second sheave.

The storage structure of the upper spreader according to one aspect of the present invention can improve the efficiency of disassembling and assembling work of construction machinery.

FIG. 1 is a schematic side view showing an assembly unit of a construction machine including a storage structure of an upper spreader according to an embodiment of the present invention. FIG. 2 is a partially enlarged view of the storage structure of the upper spreader of FIG. FIG. 3 is a schematic side view showing a support portion and a lower spreader in the storage structure of the upper spreader of FIG. FIG. 4 is a schematic side view showing the upper spreader in the storage structure of the upper spreader of FIG. FIG. 5 is a schematic plan view of the support portion and the lower spreader of FIG. FIG. 6 is a schematic plan view of the upper spreader of FIG. FIG. 7 is a schematic side view of a construction machine assembled using the construction machine assembly unit of FIG. FIG. 8 is a schematic side view showing a storage procedure of the upper spreader in the storage structure of the upper spreader of FIG. FIG. 9 is a schematic side view showing the next storage procedure of FIG. 8 of the upper spreader in the storage structure of the upper spreader of FIG.

[Explanation of Embodiment of the present invention]
First, embodiments of the present invention will be listed and described.

The storage structure of the upper spreader according to one aspect of the present invention made to solve the above-mentioned problems is connected to the lower boom, the jib undulating winch mounted on the lower boom, and the first lower boom. It has an intermediate boom and a first sheave on which a jib undulating rope unwound from the jib undulating winch is hung, and a lower spreader mounted on the first intermediate boom and the jib undulating rope are the first sheave. The lower spreader and the upper spreader are provided with an upper spreader having a second sheave to be hung between the two, and the jib undulating rope is wound by the jib undulating winch so that the jib undulating rope becomes the first. They are connected to each other and held integrally in a state of being hung between the 1 sheave and the second sheave.

The storage structure of the upper spreader integrates the lower spreader and the upper spreader with the jib undulating rope hung between the first sheave of the lower spreader and the second sheave of the upper spreader. Can be held in. That is, since the storage structure of the upper spreader includes the jib undulating winch mounted on the lower boom, even when the lower boom is removed from the upper swivel body of the construction machine, the jib undulating winch and the above The lower spreader and the upper spreader can be treated as one unit. Therefore, the storage structure of the upper spreader does not require the work of hanging the jib undulating rope around the first sheave and the second sheave when the construction machine is separated and assembled. Therefore, the storage structure of the upper spreader can improve the efficiency of disassembling and assembling the construction machine.

It is preferable that the lower spreader and the upper spreader have pin holes that overlap each other in the wound state of the jib undulating rope, and further include a coupling pin that is inserted into the overlapping pin holes. As described above, the lower spreader and the upper spreader have pin holes that overlap each other in the wound state of the jib undulating rope, and further include a coupling pin inserted into the overlapping pin holes, whereby the lower spreader is further provided. And the above upper spreader can be easily and securely coupled.

The first intermediate boom has a main body having a square cylindrical lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders, and the tips of a pair of adjacent main girders. It has a support portion that is attached between the portions and rotatably supports the lower spreader with the direction of connecting the pair of main girders as a rotation axis, and the lower spreader is at least the tip portion of the main body. It is preferable that the first state folded along the opening and the second state raised along the axial direction of the main body can be swung. In this way, the first intermediate boom is attached between the tips of the pair of adjacent main girders, and the lower spreader can be rotated with the direction in which the pair of main girders are connected as the rotation axis. It has a support portion to support, and the lower spreader is between a first state in which the lower spreader is folded at least along the tip opening of the main body and a second state in which the lower spreader is raised along the axial direction of the main body. Is configured to be swingable, so that the lower spreader and the upper spreader can be easily connected in the second state. Further, by connecting the upper spreader to the lower spreader and then folding the lower spreader into the first state, the lower spreader and the upper spreader can be safely and compactly stored.

It is preferable that the lower spreader is configured to be swingable up to a third state standing in a direction perpendicular to the axis of the main body. As described above, the lower spreader is configured to be swingable up to the third state standing in the direction perpendicular to the axis of the main body, whereby the first intermediate boom and the tip of the first intermediate boom are formed. It can be easily separated from other booms to be connected. As a result, it is possible to promote the efficiency of disassembly and assembly work of construction machinery.

It is preferable that the second intermediate boom further includes a second intermediate boom detachably connected to the tip of the first intermediate boom, and the second intermediate boom has a guiding member capable of guiding the upper spreader to a connection position with the lower spreader. .. In this way, a second intermediate boom that is detachably connected to the tip of the first intermediate boom is further provided, and the second intermediate boom can guide the upper spreader to a connecting position with the lower spreader. By having the above, it is possible to more easily and surely connect the lower spreader and the upper spreader.

The storage structure of the upper spreader may further include a fixing member for fixing the upper spreader connected to the lower spreader in the first state to the auxiliary girder. As described above, the storage structure of the upper spreader further includes a fixing member for fixing the upper spreader connected to the lower spreader in the first state to the auxiliary girder, whereby the lower spreader and the upper spreader are provided. It can be safely and securely stored along the opening at the tip of the main body of the first intermediate boom.

The assembly unit of the construction machine according to another aspect of the present invention made to solve the above problems includes a storage structure of the upper spreader.

Since the assembly unit of the construction machine includes the storage structure of the upper spreader, it is possible to improve the efficiency of the disassembly and assembly work of the construction machine.

The method for transporting the assembly unit according to another aspect of the present invention, which has been made to solve the above problems, includes a step of removing the lower boom from the upper swing body of the construction machine and an assembly unit removed in the removal step. It is provided with a process of transporting.

In the transport method, by separating the assembly unit from the upper swing body of the construction machine, the assembly unit can be easily transported in a manner that does not conflict with transportation restrictions or the like. Further, according to this configuration, it is possible to improve the efficiency of disassembling and assembling work of construction machinery.

The method of storing the upper spreader according to another aspect of the present invention, which has been made to solve the above problems, is connected to the lower boom, the jib undulating winch mounted on the lower boom, and the lower boom. It has a first intermediate boom and a first sheave on which a jib undulating rope unwound from the jib undulating winch is hung, and a lower spreader mounted on the first intermediate boom and the jib undulating rope are the first. A method of storing an upper spreader in a construction machine including an upper spreader having a second sheave that is hung between the sheaves, wherein the jib undulating rope is wound by winding the jib undulating rope by the jib undulating winch. The step of connecting the lower spreader and the upper spreader in a state of being hung between the first sheave and the second sheave, and after the connecting step, the lower spreader and the upper spreader are connected to the first intermediate boom. It is provided with a step of folding along the opening of the tip portion of the rope and a step of fixing the upper spreader to the first intermediate boom in the folded state by the folding step.

The method of storing the upper spreader is such that the lower spreader and the upper spreader are integrated in a state where the jib undulating rope is hung between the first sheave of the lower spreader and the second sheave of the upper spreader. Can be stored in. Therefore, the method of storing the upper spreader can improve the efficiency of disassembling and assembling the construction machine.

[Details of Embodiments of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First Embodiment]
<Storage structure of upper spreader>
As shown in FIGS. 1 and 2, the storage structure of the upper spreader includes a lower boom 2, a jib undulating winch 1 mounted on the lower boom 2, and a first intermediate boom 3 connected to the lower boom 2. The lower spreader 5 mounted on the first intermediate boom 3 and the jib undulating rope 4 have a first sheave 11 over which the jib undulating rope 4 unwound from the jib undulating winch 1 is hung, and the jib undulating rope 4 is the first sheave 11. It comprises an upper spreader 6 having a second sheave 12 hung between and. The lower spreader 5 and the upper spreader 6 have the jib undulating rope 4 wound around by the jib undulating winch 1, so that the jib undulating rope 4 is hung between the first sheave 11 and the second sheave 12 to each other. It is connected and held integrally.

As shown in FIGS. 3 and 4, the lower spreader 5 and the upper spreader 6 have pin holes 13a and 14a that overlap each other in the wound state of the jib undulating rope 4. Further, as shown in FIGS. 1 and 2, the storage structure of the upper spreader includes a coupling pin 7 inserted into the overlapping pin holes 13a and 14a and a fixing member for fixing the upper spreader 6 to the first intermediate boom 3. Equipped with 8.

The storage structure of the upper spreader may be included in one assembly unit 10 which constitutes the minimum unit at the time of disassembling and assembling the construction machine. In other words, the upper spreader 6 is coupled to the lower spreader 5 by the coupling pin 7, and together with the jib undulating winch 1, the lower boom 2, the first intermediate boom 3, and the jib undulating rope 4, the construction machine assembly unit 10 (hereinafter referred to as the construction machine assembly unit 10). , Simply referred to as "assembly unit 10"). The assembly unit 10 is itself an embodiment of the present invention.

The assembly unit 10 is used, for example, as a component of the construction machine 20 of FIG. 7. Examples of the construction machine 20 include a crane. The construction machine 20 includes a lower traveling body 21, an upper swivel body 22 rotatably mounted on the lower traveling body 21, and an undulating member 23 undulatingly attached to the upper swivel body 22. The undulating member 23 includes a boom 24 undulatingly attached to the upper strut body 22, a jib 25 undulatingly connected to the tip of the boom 24, and a triangular ring connected to the tip of the boom 24 and behind the jib 25. Has a strut 26 and. The boom 24 includes a lower boom 2 detachably attached to the upper swing body 22, a first intermediate boom 3 connected to the tip of the lower boom 2, and one or more connected to the tip side of the first intermediate boom 3. It has another intermediate boom 24a and a tower cap 24b connected to the tip end side of the other intermediate boom 24a. Examples of the other intermediate boom 24a include a second intermediate boom 17, which will be described later, which is connected to the tip of the first intermediate boom 3. The strut 26 has a front strut 26a extending rearward from the tip of the boom 24 and toward the jib 25, and a rear strut 26b extending rearward and toward the boom 24 from the tip of the boom 24.

Further, the undulating member 23 has a jib undulating winch 1 mounted on the lower boom 2 and a first sheave 11 over which a jib undulating rope 4 unwound from the jib undulating winch 1 is hung, and the first intermediate boom 3 is provided. The upper spreader 6 which has the second sheave 12 in which the jib undulating rope 4 is hung between the lower spreader 5 mounted on the lower spreader 5 and the first sheave 11 and is arranged apart from the lower spreader 5. It has a strut guy line 27 that connects the upper spreader 6 and the tip (rear end) of the rear strut 26b, and a jib guy line 28 that connects the tip of the jib 25 and the tip (rear end) of the front strut 26a. ..

The assembly unit 10 is incorporated into the construction machine 20 by attaching the base end portion of the lower boom 2 to the upper swing body 22 and connecting the upper spreader 6 to the strut guy line 27. The assembly unit 10 pulls out the coupling pin 7 from the pin holes 13a and 14a to release the coupling between the lower spreader 5 and the upper spreader 6, and then feeds the jib undulating rope 4 from the jib undulating winch 1 to the lower spreader 5. The undulating posture of the jib 25 is controlled by adjusting the distance from the upper spreader 6.

Hereinafter, the storage structure of the upper spreader will be described in detail with reference to FIGS. 1 to 9.

(Lower boom)
The lower boom 2 has a lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders to each other. The lower boom 2 is arranged in a V shape so that the main girders adjacent to each other in the undulating direction are separated from each other from the base end side to the tip end side in a state of being attached to the upper swivel body 22. The lower boom 2 has a connecting hole 2a penetrating in the width direction at the base end portion. The lower boom 2 is undulatingly attached to the upper swing body 22 by the connecting hole 2a. The "base end side" of the boom means the side connected to the upper swing body in the construction machine, and the "tip side" means the opposite side.

(1st intermediate boom)
The first intermediate boom 3 is detachably connected to the tip end side of the lower boom 2. The first intermediate boom 3 has a main body 15 having a square tubular lattice structure having four main girders 15a and a plurality of auxiliary girders 15b connecting adjacent main girders 15a, and a pair of adjacent main girders. It has a support portion 16 that is attached between the tip portions of the 15a and rotatably supports the lower spreader 5 with the direction in which the pair of main girders 15a are connected as a rotation axis.

The main body 15 has a tip opening and a base opening.

The support portion 16 is attached between a pair of main girders 15a located on the back side of the main body 15 (the side on which the boom 24 is turned upside down in the construction machine 20). As shown in FIGS. 3 and 5, the support portion 16 includes a pair of brackets 16a attached between a pair of adjacent main girders 15a of the main body 15 so as to face each other in the width direction of the main body 15, and a pair of brackets 16a. It has a guide sheave 16b rotatably connected to the lower spreader 5 and a shaft portion 16c that rotatably supports the lower spreader 5. Further, the support portion 16 has a pin hole 16d that coaxially overlaps with the pin hole 5c of the lower spreader 5 when the lower spreader 5 is erected as described later. The pair of brackets 16a has a connection hole 16e connected to the main body 15. A rod member (not shown) such as a pin is inserted into the connection hole 16e. The support portion 16 is connected to the main body 15 via the rod member. A connection bar 16f is bridged between the pair of brackets 16a. As shown in FIGS. 1 and 2, the rotation axis of the guide sheave 16b projects toward the tip end side of the tip end opening of the main body 15. Further, the rotation shaft of the guide sheave 16b and the shaft portion 16c are located coaxially with each other.

(Lower spreader)
The lower spreader 5 is directly connected to the support portion 16 and is connected to the main body 15 via the support portion 16. The lower spreader 5 is rotatably connected to the shaft portion 16c of the support portion 16. As a result, as shown in FIGS. 1 and 2, the lower spreader 5 is configured to be foldable in the first state along the tip opening of the main body 15 of the first intermediate boom 3 with the shaft portion 16c as the rotation axis. There is. In the storage structure of the upper spreader, the lower spreader 5 and the upper spreader 6 are usually held in the first state in a state of being connected by the coupling pin 7.

As shown in FIG. 8, the lower spreader 5 is configured to be swingable between the first state and the second state raised along the axial direction of the main body 15 of the first intermediate boom 3. ing. Further, as shown in FIG. 9, the lower spreader 5 is configured to be swingable from the first state to the third state standing upright in the direction perpendicular to the axis of the main body 15 of the first intermediate boom 3. .. In other words, the lower spreader 5 is configured to be swingable by approximately 90 ° on both sides in the rotation direction with respect to the second state.

As shown in FIGS. 3 and 5, the lower spreader 5 includes a pair of brackets 5a facing each other in the width direction of the main body 15 and a first sheave 11 rotatably connected to the pair of brackets 5a. The pair of brackets 5a have a long plate shape. The pair of brackets 5a has a support hole 5b rotatably supported by the shaft portion 16c of the support portion 16 at one end in the longitudinal direction. The pair of brackets 5a has a pair of pin holes 13a that are coupled to the upper spreader 6 by the coupling pin 7 described above at the other end in the longitudinal direction. Further, the pair of brackets 5a are supported by the pin hole 5c coaxially overlapping the pin hole 16d provided in the support portion 16 in the third state, and by the support base portion 17c described later in the second state. It has a protrusion 5d.

(Upper spreader)
As shown in FIGS. 4 and 6, the upper spreader 6 is rotatably connected to a pair of brackets 6a facing each other at a distance in the width direction of the main body 15 of the first intermediate boom 3 and a pair of brackets 6a. It has a second sheave 12 and a connection bar 6b connected to the pair of brackets 6a.

The pair of brackets 6a has a substantially elongated plate shape with the direction facing the lower spreader 5 as the longitudinal direction. The pair of brackets 6a has a pair of pin holes 14a coupled to the lower spreader 5 by a coupling pin 7 at an end adjacent to the lower spreader 5. The pair of brackets 6a is a stepped portion for interference for pressing the proximity of the upper spreader 6 to the lower spreader 5 at a position where the pin hole 13a of the lower spreader 5 and the pin hole 14a of the upper spreader 6 are coaxially overlapped with each other. Has 6c. Further, the pair of brackets 6a has a connecting portion 6d connected to the above-mentioned strut guy line 27 in the construction machine 20 at an end portion opposite to the side adjacent to the lower spreader 5. Further, the pair of brackets 6a are mounted on the guiding member 17b of the second intermediate boom 17, which will be described later, and support the guided member 6e configured to be movable on the guiding member 17b and the guiding member 17b from the side. It also has a leg portion 6f for guiding the guided member 6e onto the guiding member 17b.

(Fixing member)
The fixing member 8 fixes the upper spreader 6 connected to the lower spreader 5 in the first state to the main body 15 of the first intermediate boom 3. More specifically, the fixing member 8 fixes the upper spreader 6 to the auxiliary girder 15b of the main body 15. The storage structure of the upper spreader is provided with a fixing member 8, so that the upper spreader 6 and the lower spreader 5 connected to the upper spreader 6 can be safely and securely moved along the tip opening of the main body 15 of the first intermediate boom 3. Can be stored in.

The fixing member 8 is, for example, a fixing band. The fixing member 8 is hung between, for example, the connection bar 6b of the upper spreader 6 and the auxiliary girder 15b of the main body 15. As a result, the fixing member 8 binds the connection bar 6b of the upper spreader 6 and the auxiliary girder 15b of the main body 15. The fixing member 8 only needs to be able to fix the upper spreader 6 to the first intermediate boom 3, and does not have to be hung between the connection bar 6b of the upper spreader 6 and the auxiliary girder 15b of the main body 15. For example, the fixing member 8 may bind the bracket 6a of the upper spreader 6 and the auxiliary girder 15b of the main body 15 or may bind the bracket 6a of the upper spreader 6 and the main girder 15a of the main body 15.

<How to store the upper spreader>
Next, an example of how to store the upper spreader 6 will be described with reference to FIGS. 8 and 9.

The method of storing the upper spreader 6 includes a step of connecting the lower spreader 5 and the upper spreader 6 (connecting step), a step of folding the lower spreader 5 and the upper spreader 6 after the connecting step (folding step), and the folding step. A step (fixing step) of fixing the upper spreader 6 to the first intermediate boom 3 in the folded state is provided.

<Connecting process>
In the above connecting step, the lower spreader 5 and the upper spreader 6 are wound around the jib undulating rope 4 between the first sheave 11 and the second sheave 12 by winding the jib undulating rope 4 by the jib undulating winch 1. To concatenate. The connection step is performed in a state where the second intermediate boom 17 is connected to the tip of the first intermediate boom 3 as another intermediate boom. The connection process will be described with reference to FIG.

(Second intermediate boom)
The second intermediate boom 17 has a main body 17a having a square cylindrical lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders, and a pair of adjacent main girders of the main body 17a. It has a guiding member 17b attached between them and arranged parallel to these main girders. The main body 17a is detachably connected to the tip of the main body 15 of the first intermediate boom 3. The guide member 17b is arranged on the same surface side (that is, the dorsal side) as the support portion 16 in a state where the main body 17a of the second intermediate boom 17 is connected to the main body 15 of the first intermediate boom 3. The guide member 17b extends in the longitudinal direction of the main body 17a. The guiding member 17b is configured to be able to guide the upper spreader 6 to a connecting position with the lower spreader 5. Further, on the back side of the main body 15, a support base portion 17c for supporting the protrusion 5d of the lower spreader 5 in the second state is provided. The support base portion 17c supports the protrusion 5d of the lower spreader 5 to position the lower spreader 5 at a position where it can be easily connected to the upper spreader 6.

(Connecting the lower spreader and the upper spreader)
The lower spreader 5 and the upper spreader 6 are connected in a state where the boom 24 is laid down. First, the protrusion 5d of the lower spreader 5 is supported by the support base portion 17c, the connection between the upper spreader 6 and the strut guy line 27 is released, and then the jib undulating rope 4 is wound up by the jib undulating winch 1. As a result, the upper spreader 6 moves closer to the lower spreader 5. When the upper spreader 6 comes close to the lower spreader 5 to a certain extent, the upper spreader 6 is guided on the guide member 17b. Further, when the jib undulating rope 4 is wound up by the jib undulating winch 1, the step portion 6c of the pair of brackets 6a of the upper spreader 6 and the pair of brackets 5a of the lower spreader 5 interfere with each other, and the pin hole 14a of the upper spreader 6 is used. And the pin hole 13a of the lower spreader 5 are coaxially overlapped with each other, and the movement of the upper spreader 6 is stopped. In this state, the lower spreader 5 and the upper spreader 6 are coupled to each other by inserting the coupling pin 7 into the pin hole 14a of the upper spreader 6 and the pin hole 13a of the lower spreader 5. As shown in FIG. 8, the structure in which the lower spreader 5 and the upper spreader 6 are connected in a state where the second intermediate boom 17 is detachably connected to the tip of the first intermediate boom 3 is the structure of the present invention. It is an embodiment.

The storage structure of the upper spreader includes a second intermediate boom 17 detachably connected to the tip of the first intermediate boom 3, and since the second intermediate boom 17 has an induction member 17b, the lower part is provided. The spreader 5 and the upper spreader 6 can be easily and reliably connected.

<Folding process>
In the folding step, the lower spreader 5 and the upper spreader 6 are folded along the opening at the tip of the first intermediate boom 3. In the folding step, as shown in FIG. 9, the lower spreader 5 is first swung to the third state while being connected to the upper spreader 6. Subsequently, the temporary fixing pin 18 is inserted into the pin hole 16d of the support portion 16 and the pin hole 5c of the lower spreader 5 that are coaxially overlapped with each other. As a result, the lower spreader 5 and the upper spreader 6 are fixed in the third state. Next, with the lower spreader 5 and the upper spreader 6 fixed in the third state, the connection between the first intermediate boom 3 and the second intermediate boom 17 is released. After that, the temporary fixing pin 18 is pulled out from the pin holes 16d and 5c, and the lower spreader 5 and the upper spreader 6 are swung to the first state.

Since the lower spreader 5 is configured to swing between the first state and the second state in the storage structure of the upper spreader, the lower spreader 5 and the upper spreader 6 are in the second state. The connection can be easily performed. Further, by connecting the upper spreader 6 to the lower spreader 5 in this second state and then folding the lower spreader 5 into the first state, the lower spreader 5 and the upper spreader 6 can be safely and safely along the first intermediate boom 3. Can be stored compactly.

In the storage structure of the upper spreader, since the lower spreader 5 is configured to swing up to the third state, the first intermediate boom 3 and the second intermediate boom 17 connected to the tip of the first intermediate boom 3 are connected. It can be easily separated from.

<Fixing process>
In the fixing step, the upper spreader 6 and the first intermediate boom 3 are fixed by the fixing member 8 in the first state.

<Transport method>
Subsequently, a method of transporting the assembly unit will be described. The transfer method can be suitably applied as a method for transporting the assembly unit in the state after the fixing step. The transport method includes a step of removing the lower boom 2 from the upper swing body 22 of the construction machine 20 (removal step) and a step of transporting the assembly unit removed in the removal step (transport step). The assembly unit 10 in FIG. 1 shows a state after the removal step. In the above transfer step, the assembly unit 10 is placed on the trailer using, for example, a phase size machine, and the assembly unit 10 is conveyed in a state of being fixed to the trailer.

<Advantage>
The storage structure of the upper spreader includes the lower spreader 5 and the upper spreader 6 in a state where the jib undulating rope 4 is hung between the first sheave 11 of the lower spreader 5 and the second sheave 12 of the upper spreader 6. Can be held integrally. That is, since the storage structure of the upper spreader includes the jib undulating winch 1 mounted on the lower boom 2, even when the lower boom 2 is removed from the upper swivel body 22 of the construction machine 20, the jib undulating winch 1 is provided. And the lower spreader 5 and the upper spreader 6 can be treated as one unit. Therefore, the storage structure of the upper spreader does not require the work of hanging the jib undulating rope 4 around the first sheave 11 and the second sheave 12 when the construction machine 20 is separated and assembled. Therefore, the storage structure of the upper spreader can improve the efficiency of the disassembling and assembling work of the construction machine 20.

In the storage structure of the upper spreader, the lower spreader 5 and the upper spreader 6 have pin holes 13a and 14a that overlap each other in the wound state of the jib undulating rope 4, and the coupling pins 7 are inserted into the overlapping pin holes 13a and 14a. Is inserted, so that the lower spreader 5 and the upper spreader 6 can be easily and securely connected.

Since the assembly unit 10 includes a storage structure for the upper spreader, it is possible to improve the efficiency of disassembling and assembling the construction machine 20.

The method of storing the upper spreader is as follows: the lower spreader 5 and the upper spreader 6 are stored in a state where the jib undulating rope 4 is hung between the first sheave 11 of the lower spreader 5 and the second sheave 12 of the upper spreader 6. It can be stored integrally. Therefore, the method of storing the upper spreader can improve the efficiency of the disassembling and assembling work of the construction machine 20.

In the transport method, by separating the assembly unit 10 from the upper swing body 22 of the construction machine 20, the assembly unit 10 can be easily transported in a manner that does not conflict with transport restrictions or the like. Further, according to this configuration, it is possible to improve the efficiency of the disassembly and assembly work of the construction machine 20.

[Other embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, the above-described embodiment can be omitted, replaced or added with components of each part of the above-described embodiment based on the description of the present specification and common general technical knowledge, and all of them are construed to belong to the scope of the present invention. Should be.

For example, in the above embodiment, the configuration in which the lower boom and the first intermediate boom are detachably connected is described, but in the storage structure of the upper spreader, the lower boom and the first intermediate boom are not detachable ( That is, they may be formed integrally.

The first intermediate boom may be configured without the support portion described above. In this case, the lower spreader may be connected to the main body of the first intermediate boom via another member, or may be directly connected to the main body.

In the storage structure of the upper spreader, the lower spreader and the upper spreader may be coupled to each other by a member other than the coupling pin. For example, the lower spreader and the upper spreader may be connected using bolts and nuts, or may be connected using hooks.

In the storage structure of the upper spreader, for example, the upper spreader can be fixed to the second intermediate boom by a fixing member in a state where the second intermediate boom and the first intermediate boom are connected. In this case, the lower spreader may not be configured to swing up to the first state described above.

The assembly unit of the construction machine may be one in which the second intermediate boom is connected to the first intermediate boom.

The storage structure of the upper spreader may not include a fixing member for fixing the upper spreader to the first intermediate boom or the second intermediate boom. Further, even when the storage structure of the upper spreader includes the fixing member, the specific configuration of the fixing member is not particularly limited. For example, the upper spreader may be fixed to the first intermediate boom or the second intermediate boom by hooking with a hook or the like.

In the above embodiment, the configuration in which the second intermediate boom has the guiding member and the upper spreader has the guided member moving on the guiding member has been described. The combination of the guided member and the guided member is not particularly limited, and examples thereof include rails and rollers, plates and rollers, and the like.

In the above embodiment, the case of transporting the assembly unit in the state after the fixing step (state in FIG. 1) has been described. However, the transfer method can also be used, for example, as a transfer method for an assembly unit in a state where the second intermediate boom is connected to the first intermediate boom (state in FIG. 8).

The storage structure of the upper spreader according to one aspect of the present invention is suitable for improving the efficiency of disassembling and assembling the crane.

1 Jib undulating winch 2 Lower boom 2a Connecting hole 3 1st intermediate boom 4 Jib undulating rope 5 Lower spreader 5a, 6a, 16a Bracket 5b Support hole 5c, 13a, 14a, 16d Pin hole 5d Protrusion 6 Upper spreader 6b, 16f Connection bar 6c Step 6d Connecting part 6e Guided member 6f Leg part 7 Coupling pin 8 Fixing member 10 Assembly unit 11 First sheave 12 Second sheave 15, 17a Main body 15a Main girder 15b Auxiliary girder 16 Support part 16b Guide sheave 16c Shaft part 16e Connection hole 17 Second intermediate boom 17b Induction member 17c Support base 18 Temporary fixing pin 20 Construction machine 21 Lower traveling body 22 Upper swivel body 23 Undulating member 24 Boom 24a Intermediate boom 24b Tower cap 25 Jib 26 Strut 26a Front strut 26b Rear strut 27 Strut Guy Line 28 Jib Guy Line

Claims (9)

With the lower boom,
The jib undulating winch mounted on the lower boom above,
The first intermediate boom connected to the lower boom and
The lower spreader, which has a first sheave on which the jib undulating rope unwound from the jib undulating winch is hung and is mounted on the first intermediate boom,
The jib undulating rope comprises an upper spreader having a second sheave that is hung between the first sheave and the first sheave.
The lower spreader and the upper spreader are wound around the jib undulating rope by the jib undulating winch, so that the jib undulating rope is hung between the first sheave and the second sheave. Storage structure of the upper spreader that is connected and held integrally. The lower spreader and the upper spreader have pin holes that overlap each other in the wound state of the jib undulating rope.
The storage structure for an upper spreader according to claim 1, further comprising a coupling pin inserted into the overlapping pin holes. The first intermediate boom mentioned above
A main body having a square tubular lattice structure having four main girders and a plurality of auxiliary girders connecting adjacent main girders to each other.
It is attached between the tips of a pair of adjacent main girders, and has a support portion that rotatably supports the lower spreader with the direction of connecting the pair of main girders as a rotation axis.
The lower spreader is configured to be swingable between at least the first state folded along the tip opening of the main body and the second state raised along the axial direction of the main body. The storage structure of the upper spreader according to claim 1 or 2. The storage structure for the upper spreader according to claim 3, wherein the lower spreader is configured to swing up to a third state in which the lower spreader stands upright in a direction perpendicular to the axis of the main body. Further equipped with a second intermediate boom that is detachably connected to the tip of the first intermediate boom.
The storage structure of the upper spreader according to claim 3 or 4, wherein the second intermediate boom has a guiding member capable of guiding the upper spreader to a connecting position with the lower spreader. The storage structure for the upper spreader according to claim 3, 4, or 5, further comprising a fixing member for fixing the upper spreader connected to the lower spreader in the first state to the auxiliary girder. An assembly unit for a construction machine having a storage structure for an upper spreader according to any one of claims 1 to 6. The method for transporting an assembly unit according to claim 7.
The process of removing the lower boom from the upper swing body of the construction machine,
A transport method including a step of transporting the assembly unit removed in the above removal step. With the lower boom,
The jib undulating winch mounted on the lower boom above,
The first intermediate boom connected to the lower boom and
The lower spreader, which has a first sheave on which the jib undulating rope unwound from the jib undulating winch is hung and is mounted on the first intermediate boom,
A method of storing an upper spreader in a construction machine comprising an upper spreader having a second sheave in which the jib undulating rope is hung between the first sheave and the first sheave.
A step of connecting the lower spreader and the upper spreader in a state where the jib undulating rope is wound between the first sheave and the second sheave by winding the jib undulating rope with the jib undulating winch. ,
After the connection step, the step of folding the lower spreader and the upper spreader along the tip opening of the first intermediate boom, and
A method for storing an upper spreader, which comprises a step of fixing the upper spreader to the first intermediate boom in a folded state by the folding step.

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