WO2020246267A1 - Grue et procédé d'assemblage de grue - Google Patents

Grue et procédé d'assemblage de grue Download PDF

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Publication number
WO2020246267A1
WO2020246267A1 PCT/JP2020/020322 JP2020020322W WO2020246267A1 WO 2020246267 A1 WO2020246267 A1 WO 2020246267A1 JP 2020020322 W JP2020020322 W JP 2020020322W WO 2020246267 A1 WO2020246267 A1 WO 2020246267A1
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WO
WIPO (PCT)
Prior art keywords
boom
strut
jib
lower jib
crane
Prior art date
Application number
PCT/JP2020/020322
Other languages
English (en)
Japanese (ja)
Inventor
松尾　洋平
祐三 大空
高▲広▼ 岡
健一 中司
徹也 小畠
大輔 高岡
景子 稲田
Original Assignee
コベルコ建機株式会社
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Filing date
Publication date
Application filed by コベルコ建機株式会社 filed Critical コベルコ建機株式会社
Priority to SG11202112743YA priority Critical patent/SG11202112743YA/en
Publication of WO2020246267A1 publication Critical patent/WO2020246267A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes

Definitions

  • the present invention relates to a crane and a crane assembling method in which a boom head, struts, and a lower jib are integrated and can be connected to the tip of a fallen boom body.
  • Patent Document 1 discloses a divided transportation method in which a boom head (tower cap) divided from a boom body and a lower jib are connected and transported.
  • An object of the present invention is to provide a crane and a method for assembling a crane, which can easily connect a boom head to the tip of a fallen boom body.
  • a crane a boom including a crane body, a base end portion rotatably supported by the crane body in an undulating direction, and a tip end portion opposite to the base end portion.
  • a boom having a main body and a boom head detachably connected to the tip of the boom main body is supported by the boom head so as to be rotatable in an undulating direction around a horizontal first rotation center axis.
  • a jib having a lower jib to be attached and a jib connector detachably connected to the tip of the lower jib, and the first rotation center behind the lower jib in a state where the boom and the jib are upright.
  • a support portion capable of supporting a portion on the tip side of the rotation central axis is provided, and the strut and the lower jib are mounted on the boom head, and the strut is placed on the support portion.
  • the strut, the lower jib, and the boom head form a connecting unit, and the connecting unit can be integrally connected to the tip of the boom body that is laid down with respect to the crane body.
  • the boom head is arranged to face the tip of the collapsed boom body, and the lower jib is rotatably supported by the boom head on the opposite side of the boom body with the boom head in between and the strut.
  • the lower jib is around the first rotation center axis in a state where the connecting unit is lifted so as to be rotatably supported by the boom head above the lower jib and mounted on the support portion.
  • the lower jib moves relative to the strut in the front-rear direction while the strut rotates around the second rotation center axis and the strut is in contact with the support portion.
  • the support supports the strut so that the head can change its posture with respect to the boom body.
  • a crane body a boom body including a base end portion rotatably supported by the crane body in an undulating direction, and a tip end portion opposite to the base end portion.
  • a boom having a boom head detachably connected to the tip of the boom body, and supported by the boom head so as to be rotatable in an undulating direction around a horizontal first rotation center axis.
  • a jib having a lower jib and a jib connector detachably connected to the tip of the lower jib, and the first rotation center axis behind the lower jib in a state where the boom and the jib are upright.
  • the assembly method includes a preparatory step in which the strut and the lower jib are rotatably attached to the boom head to prepare a connecting unit composed of the boom head, the strut and the lower jib, and the crane main body.
  • the boom head is arranged to face the tip of the boom body that has been laid down, and the lower jib is rotatably supported by the boom head on the opposite side of the boom body with the boom head in between.
  • FIG. 1 is a side view of a crane according to an embodiment of the present invention.
  • FIG. 2 is an enlarged view of the main part A of FIG. 1, and is an enlarged perspective view of a part of the lower jib.
  • FIG. 3 is a diagram showing a change in posture of the lower jib of the crane according to the embodiment of the present invention.
  • FIG. 4 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which the connecting unit is brought close to the boom main body.
  • FIG. 5 is a side view of the crane according to the embodiment of the present invention, showing a state in which the back surface side portion of the boom head and the boom main body are connected by a pin.
  • FIG. 1 is a side view of a crane according to an embodiment of the present invention.
  • FIG. 2 is an enlarged view of the main part A of FIG. 1, and is an enlarged perspective view of a part of the lower jib.
  • FIG. 3 is
  • FIG. 6 is a side view of the crane according to the embodiment of the present invention, showing a state in which the tip of the lower jib is grounded.
  • FIG. 7 is a side view of the crane according to the embodiment of the present invention, showing a state in which the ventral side portion of the boom head and the boom main body are connected by a pin.
  • FIG. 8 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which the triangular guide is raised.
  • FIG. 9 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which the boom body is obliquely raised.
  • FIG. 10 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which the boom main body is laid down substantially horizontally.
  • FIG. 11 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which struts are assembled.
  • FIG. 12 is a side view of the crane according to the embodiment of the present invention, and is a view showing a state in which the lower jib is hung down.
  • FIG. 13 is a side view of the crane according to the embodiment of the present invention, showing a state in which the lower jib is pulled under the boom main body.
  • FIG. 14 is a side view of the crane according to the embodiment of the present invention, showing a state in which the lower jib is inverted by approximately 180 degrees.
  • FIG. 15 is a side view of the crane according to the embodiment of the present invention, showing a state in which the connector on the back side of the intermediate jib and the connector on the back side of the lower jib are connected.
  • FIG. 16 is a side view of the crane according to the embodiment of the present invention, showing a state in which the connector on the ventral surface side of the intermediate jib and the connector on the ventral surface side of the lower jib are connected.
  • FIG. 1 is a side view of the tower crane 1 (crane) of the present embodiment.
  • the tower crane 1 has a lower traveling body 21 and an upper swinging body 22 (crane main body), and the upper swinging body 22 is rotatably mounted on the crawler type lower traveling body 21. It is composed.
  • the tower crane 1 may be a mobile crane using a moving mechanism (for example, a wheel) other than a crawler, or may be a fixed crane having no moving mechanism.
  • the application target of the present invention is not limited to the tower crane, and for example, the present invention can be applied to other cranes such as a roughing crane.
  • the upper swivel body 22 has a swivel frame 23.
  • the tower crane 1 includes a tower (boom) 24, a jib 25, a gantry 26, a strut 27, a lower spreader 28, a jib undulating lower spreader 35, a strut guy line 36, and a jib undulating upper spreader 37.
  • the swivel frame 23 is attached to the lower traveling body 21 via a swivel bearing (not shown).
  • the tower 24 is undulatingly connected to the swivel frame 23 at the front portion of the swivel frame 23.
  • the tower 24 has a tower body 240 (boom body) and a tower cap 24a (boom head).
  • the tower main body 240 includes a base end portion rotatably supported by the upper swivel body 22 in the undulating direction and a tip end portion on the side opposite to the base end portion.
  • the tower cap 24a is detachably connected to the tip of the tower body 240.
  • One end of the boom guy line 39 is connected to the tower cap 24a.
  • the jib 25 is rotatably connected to the tower cap 24a on the ventral side (front side) of the tower 24.
  • the jib 25 is undulating with respect to the tower 24.
  • the jib 25 can be attached to and detached from the lower jib 25a supported by the tower cap 24a so as to be rotatable around the horizontal first rotation center axis and the tip of the lower jib 25a.
  • It has a jib connector 250 (FIG. 1) to be coupled.
  • the jib connector 250 includes an intermediate jib 25b and an upper jib 25c described later.
  • a jib point sheave 31 is provided at the tip of the jib 25.
  • a hook 33 is suspended from the jib point sheave 31 via a hoisting rope 32.
  • the hoisting rope 32 is wound around a sheave 450 (FIG. 3) pivotally supported by a triangular guide 45 connected to the back side (rear side) of the tower cap 24a and a jib point sheave 31, and then hooked. It is wound around 33.
  • the gantry 26 is attached to the rear part of the swivel frame 23.
  • the struts 27 have a triangular shape in a plan view from the side, and are rotatably connected to the tower cap 24a on the back side (rear side) of the tower 24.
  • the strut 27 has a front strut 27a, a rear strut 27b, and a connecting member 27c.
  • the base end portion (lower end portion in FIG. 1) of the front strut 27a is rotatably connected to the tower cap 24a.
  • the base end portion (front end portion in FIG. 1) of the rear strut 27b is rotatably connected to the tower cap 24a.
  • One end of the connecting member 27c is connected to the tip of the rear strut 27b, while the other end is connected to the tip of the front strut 27a.
  • the tip of the front strut 27a and the tip of the jib 25 are connected by a jib guy line 34.
  • the tower 24 stands up against the upper swivel body 22 and the jib 25 stands up against the tower 24 (FIG. 1).
  • the tower cap 24a is supported by the tower cap 24a so as to be rotatable around the second rotation center axis parallel to the first rotation center axis behind the lower jib 25a in the above, and the jib 25 is supported undulatingly.
  • a jib undulation rope 38 is hung between the jib undulation lower spreader 35, which is the lower part of the tower 24 and is attached to the back side, and the jib undulation upper spreader 37, which is connected to one end of the strut guy line 36. Has been done. The other end of the strut guy line 36 is connected to the tip of the rear strut 27b.
  • the lower spreader 28 is attached to the upper end of the gantry 26.
  • a boom undulating rope 41 is hung between the lower spreader 28 and the upper spreader 40 connected to the other end of the boom guy line 39.
  • the hook winch 46, the jib undulating winch 47, and the boom undulating winch 48 are arranged at the center of the swivel frame 23, respectively.
  • the hook winch 46 winds up or unwinds the hoisting rope 32 to wind up or down the hook 33.
  • the jib undulating winch 47 winds up or unwinds the jib undulating rope 38 to undulate the strut 27 around the joint point with the tip of the tower 24.
  • the jib 25 undulates around the connection point with the tower 24.
  • the boom undulating winch 48 winds up or extends the boom undulating rope 41 to undulate the tower 24 around the boom foot pin 42, which is a fulcrum thereof.
  • the counterweight 29 is mounted on the rear part of the swivel frame 23.
  • the backstop 30 is attached to the lower and back side portions of the tower 24 and extends from the back surface portion of the tower 24 toward the swivel frame 23.
  • the backstop 30 is received by a backstop receiver (not shown) fixed to the swivel frame 23 to regulate the rotation of the tower 24 to the rear side.
  • the jib backstop 44 is attached to the back side portion of the lower jib 25a constituting the jib 25, and extends from the back surface of the lower jib 25a toward the tower cap 24a.
  • the jib backstop 44 is received by the tower cap 24a to regulate the rearward rotation of the jib 25.
  • FIG. 2 is an enlarged view of the main part A of FIG. 1, and is an enlarged perspective view of a part of the lower jib 25a.
  • the tower crane 1 further includes a support portion 2S and a connecting member 12.
  • the support portion 2S is attached to the lower jib 25a, and is capable of supporting a portion of the strut 27 (front strut 27a) on the tip side of the second rotation center axis.
  • the support portion 2S has a bracket 2 (frame) and a roller 11 (support roller).
  • the bracket 2 is attached to the strut 27 side portion of the lower jib 25a (the back side portion, the upper surface portion of the lower jib 25a in FIGS. 2 and 3). Note that FIG. 2 shows a state in which the strut 27 is placed on the lower jib 25a (roller 11).
  • the bracket 2 rotatably supports the roller 11 (support roller) which is a support member.
  • the roller 11 is made of resin or rubber, is rotatable with respect to the lower jib 25a, and has an outer peripheral surface capable of supporting the surface 27e (side surface) of the strut 27 on the lower jib 25a side.
  • the rotation axis of the roller 11 is set in the left-right direction of the upper swing body 22, that is, parallel to the first rotation center axis.
  • the lower jib 25a is supported by the roller 11 on the lower jib 25a side surface 27e of the strut 27 in a state where the back side portion of the tower cap 24a is connected to the collapsed tower body 240 and the ventral side is not connected. It becomes movable relative to the strut 27.
  • the connecting member 12 is supported by the bracket 2.
  • the connecting member 12 can connect the strut 27 and the lower jib 25a to each other so as to prevent the strut 27 from moving relative to the lower jib 25a while the support portion 2S supports the strut 27.
  • the strut 27 and the lower jib 25a are connected by pin-connecting the connecting member 12 and the front strut 27a.
  • the connecting member 12 is in a movement blocking state in which the lower jib 25a is prevented from moving relative to the strut 27 in the front-rear direction while the strut 27 is placed on the support portion 2S, and the strut 27 is in the support portion.
  • the strut 27 and the lower jib 25a are connected to each other so that the lower jib 25a can be switched to a movement allowable state in which the lower jib 25a is allowed to move relative to the strut 27 in the front-rear direction while being placed on the 2S.
  • the connecting member 12 is arranged on the tip end side of the lower jib 25a with respect to the roller 11.
  • a pin hole (not shown) is formed in the front strut 27a.
  • FIG. 3 is a diagram showing a posture change of the lower jib 25a of the tower crane 1 according to the present embodiment.
  • the integrated transportation product 51 connecting unit in which the tower cap 24a, the strut 27, the lower jib 25a, and the triangular guide 45 are integrated is the tip of the tower body 240 that has been laid down. It is possible to connect to the part.
  • the back side portion (upper portion in the drawing) of the tower cap 24a and the tower main body 240 are connected by a pin in a posture as shown by a two-dot chain line (FIG. 5).
  • the pin connection between the connecting member 12 and the front strut 27a is released, so that the connection between the strut 27 and the lower jib 25a is released.
  • the lower jib 25a moves toward the tower 24 (rearward) by its own weight while the surface 27e (FIG. 2) on the lower jib 25a side of the strut 27 is supported by the roller 11.
  • the posture of the tower cap 24a changes to a posture suitable for connecting the ventral side portion (lower portion in the drawing) of the tower cap 24a and the tower 24.
  • the tower crane 1 further has guide rollers (rotating members) 3 and 4.
  • the guide rollers 3 and 4 are provided on the strut 27 side portion (rear surface side portion) of the lower jib 25a, respectively.
  • the guide roller 3 is rotatably provided on the lower jib support leg 5 provided on the strut 27 side portion of the lower jib 25a.
  • the guide roller 4 is detachably attached to the connector 6 on the back side (upper side in the drawing) of the lower jib 25a.
  • the guide rollers 3 and 4 can roll on the ground.
  • the guide rollers 3 and 4 are rotatably mounted on the rear surface of the lower jib 25a in a state where the jib 25 stands upright with respect to the tower 24.
  • FIGS. 4 to 16 are side views of the tower crane 1 according to the present embodiment.
  • the integrated transportation product 51 (connecting unit) in which the tower cap 24a, the strut 27, the lower jib 25a, and the triangular guide 45 are integrated is brought close to the tower body 240 of the tower 24. And put it on the ground. At this time, the tower main body 240 is laid down with respect to the upper swivel body 22, and the tip end portion of the tower main body 240 is placed on the boom stand 61. By integrally transporting the tower cap 24a, the strut 27, and the lower jib 25a, it is not necessary to assemble them, so that the work efficiency can be improved.
  • the tower main body 240 has a connector 241 (first main body connecting portion) arranged at the tip of the tower main body 240 and the tip of the tower main body 240 in a state where the tower main body 240 is laid down with respect to the upper swing body 22. It has a connector 242 (second main body connecting portion) arranged below the connector 241 (FIG. 4).
  • the tower cap 24a is connected to the connector 24b (first head connecting portion) and the connector 242 so as to be rotatable around the third rotation center axis parallel to the first rotation center axis. It has a connector 24c (second head connecting portion) connected to (FIGS. 3 and 5).
  • the strut 27 and the lower jib 25a are connected by connecting the connecting member 12 and the front strut 27a.
  • the connecting member 12 and the front strut 27a As a result, it is possible to prevent the lower jib 25a from moving relative to the strut 27 during transportation.
  • the integrated transport product 51 is lifted by the auxiliary crane 100, and the connector 24b on the back side portion (upper portion in the drawing) of the tower cap 24a and the connector 241 of the tower body 240 are connected by a pin. ..
  • the wires suspended from the auxiliary crane 100 are connected to the lower jib 25a and the tower cap 24a, respectively.
  • the auxiliary crane 100 grounds the tip of the lower jib 25a as shown in FIG.
  • the wire hanging the tip of the lower jib 25a is removed, and the connection between the connecting member 12 and the front strut 27a is released.
  • the connection between the strut 27 and the lower jib 25a is released, the lower jib 25a moves toward the tower 24 by its own weight while the surface 27e on the lower jib 25a side of the strut 27 is supported by the roller 11.
  • the posture of the tower cap 24a is such that the connector 24c on the ventral side portion (lower portion in the drawing) of the tower cap 24a and the connector 242 at the tip end portion of the tower body 240 are connected. Change to a suitable posture. After that, the operator connects the connector 24c on the ventral side portion of the tower cap 24a and the connector 242 of the tower body 240 with a pin.
  • the strut 27 is connected to the tower body 240 (connector 241) with the back surface side portion (connector 24b) of the tower cap 24a connected.
  • the lower jib 25a is moved toward the tower body 240 while the surface 27e on the lower jib 25a side is supported by the rollers 11.
  • the posture of the tower cap 24a in a state where the back surface side portion of the tower cap 24a is connected to the tower main body 240 can be changed.
  • the posture of the tower cap 24a can be changed to a posture suitable for connecting the ventral side portion of the tower cap 24a and the tower main body 240. Therefore, the connector 24c of the tower cap 24a can be easily connected to the connector 242 at the tip of the inverted tower body 240.
  • the rotation of the roller 11 that supports the surface 27e on the lower jib 25a side of the strut 27 allows the lower jib 25a to be suitably moved relative to the strut 27, that is, to be slid.
  • the triangular guide 45 laid on the strut 27 is raised around the fulcrum 451 (FIG. 3), and the triangular guide 45 is attached to the connecting portion 24d (FIG. 3) of the tower cap 24a.
  • the connecting portion 452 of the above is connected.
  • the boom guy line 39 is connected to the tower cap 24a (FIG. 9).
  • the boom undulating rope 41 is wound up to raise the tower 24 diagonally, and the lower jib 25a is lifted by the auxiliary crane 100. Then, the upper swivel body 22 is swiveled and the boom stand 61 is removed.
  • the boom undulating rope 41 is extended to lay down the tower 24 substantially horizontally, and the jib guy line 36 hung on the sheave 450 and the jib undulating upper spreader 37 are connected.
  • the rear strut 27b is lifted by winding up the jib undulating rope 38, and the strut 27 is assembled by attaching the support column 27d between the rear strut 27b and the front strut 27a.
  • the boom undulating rope 41 is wound up to raise the tower 24, and the jib undulating rope 38 is wound up to raise the strut 27, and the lower jib 25a is hung from the tower cap 24a.
  • the tip of the wire W drawn out from the leaving winch (not shown) provided at the base end portion of the tower 24 is connected to the connector 8 on the back side (left side in the drawing) of the lower jib 25a.
  • the lower jib 25a is pulled under the tower 24 as shown by the arrow.
  • the guide roller 4 attached to the connector 6 touches the ground and rolls on the ground (see FIG. 2).
  • the boom undulating rope 41 is extended and the tower 24 is lowered while the lower jib 25a is inverted about 180 degrees around the fulcrum 25S (FIG. 3) (first rotation center axis).
  • the guide roller 3 provided on the lower jib support leg 5 touches the ground and rolls on the ground (see FIG. 2). This makes it easy to change the orientation of the lower jib 25a by approximately 180 degrees. It is desirable that the guide rollers 3 and 4 are arranged at the tip of the back surface (rear surface) of the lower jib 25a in the working posture of the crane 1.
  • the connector 251 on the back side (upper side in the figure) of the intermediate jib 25b to which the upper jib 25c is connected in advance and the connector 8 on the back side (upper side in the figure) of the lower jib 25a are connected. Connect with pins.
  • the intermediate jib 25b is lifted by the auxiliary crane 100, and the connector 252 on the ventral side (lower side in the figure) of the intermediate jib 25b and the connector on the ventral side (lower side in the figure) of the lower jib 25a. 6 is connected with a pin.
  • the tower cap 24a is arranged to face the tip of the inverted tower body 240, and the lower jib 25a is placed on the tower cap 24a on the opposite side of the tower body 240 with the tower cap 24a in between.
  • the integrally transported product 51 (connecting unit) was lifted so as to be rotatably supported and the strut 27 was rotatably supported by the tower cap 24a above the lower jib 25a and mounted on the support portion 2S.
  • the lower jib 25a rotates around the fulcrum 25S (first rotation center axis)
  • the strut 27 rotates around the fulcrum 27as (second rotation center axis)
  • the strut 27 contacts the support portion 2S.
  • the support portion 2S supports the strut 27 so that the tower cap 24a can change its posture with respect to the tower body 240. ..
  • the connector 24b rotates to the connector 241 so that the connector 24c of the tower cap 24a of the integrally transported product 51 that has been lifted is arranged apart from the connector 242 of the tower body 240 that has been laid down in the front-rear direction.
  • the tower cap 24a rotates around the third rotation center axis so that the connector 24c approaches the connector 242, and the posture of the tower body 240 is changed as shown in FIG.
  • the lower jib 25a rotates around the first rotation center axis
  • the strut 27 rotates around the second rotation center axis
  • the lower jib 25a moves relative to the strut 27.
  • the support portion 2S supports the strut 27 so as to allow the tower body 240 (connector 242) to approach.
  • the above assembly method includes a preparation step, a first connection step, a movement step, and a second connection step.
  • the strut 27 and the lower jib 25a are rotatably attached to the tower cap 24a, and the integrated transport product 51 (connecting unit) composed of the tower cap 24a, the strut 27 and the lower jib 25a is prepared.
  • the preparation step may include transporting the tower cap 24a, the struts 27 and the lower jib 25a together as an integral transport item 51 to the work site.
  • the tower cap 24a is arranged to face the tip of the tower body 240 that has fallen down with respect to the upper swivel body 22, and the lower jib 25a sandwiches the tower cap 24a and the tower is on the opposite side of the tower body 240.
  • At least the tower cap 24a and the lower jib 25a of the integrated transport 51 are lifted and laid down so that they are rotatably supported by the cap 24a and the strut 27 is rotatably supported by the tower cap 24a above the lower jib 25a.
  • the back surface side portion (connector 24b) of the tower cap 24a is connected to the tip end portion (connector 241) of the tower body 240 so as to be rotatable around the third rotation center axis parallel to the first rotation center axis. To do.
  • the lower jib 25a is supported on the tower body 240 side with respect to the strut 27 while the tip side portion of the strut 27 from the second rotation center axis is supported by the support portion 2S provided on the lower jib 25a.
  • the tower cap 24a is rotated around the third rotation center axis, and the ventral side portion (connector 24c) of the tower cap 24a is moved to the tip portion (connector 242) of the tower body 240.
  • ventral side portion (connector 24c) of the tower cap 24a is connected to the tip portion (connector 242) of the tower body 240.
  • the jib 25 is bent with respect to the tower 24 from the state shown in FIG. 1, and as shown in FIG. 16, the boom undulating rope 41 is extended to lay down the tower 24. As a result, the jib 25 is placed below the tower 24. Then, the intermediate jib 25b is lifted by the auxiliary crane 100, and the connection between the connector 252 on the ventral side (lower side in the figure) of the intermediate jib 25b and the connector 6 on the ventral side (lower side in the figure) of the lower jib 25a is released. ..
  • the intermediate jib 25b is lowered to the ground, and the connector 251 on the back side (upper side in the figure) of the intermediate jib 25b and the connector 8 on the back side (upper side in the figure) of the lower jib 25a are connected. To cancel. Then, as shown in FIG. 14, the jib 25 other than the lower jib 25a is removed.
  • the lower jib 25a is inverted by approximately 180 degrees, and the boom undulating rope 41 is extended to lay down the tower 24 substantially horizontally. Then, the support column 27d attached between the rear strut 27b and the front strut 27a is removed.
  • the upper swivel body 22 is swiveled, and the boom undulating rope 41 is extended to lay down the tower 24, and the tip of the tower main body 240 is placed on the boom stand 61. Then, the connection between the tower cap 24a and the boom guy line 39 is released.
  • the triangular guide 45 is tilted down and laid on the strut 27.
  • the tip end side of the lower jib 25a is suspended by the auxiliary crane 100, and the connection between the connector 24c of the ventral side portion (lower portion in the drawing) of the tower cap 24a and the connector 242 of the tower body 240 is released.
  • the lower jib 25a is moved forward until the tip of the lower jib 25a is located at the tip of the front strut 27a. Let me. Then, the strut 27 and the lower jib 25a are connected by connecting the connecting member 12 and the front strut 27a with a pin.
  • the integrated transport product 51 is lifted by the auxiliary crane 100, and the connection between the connector 24b on the back side portion (upper portion in the drawing) of the tower cap 24a and the connector 241 of the tower body 240 is released. ..
  • the integrally transported product 51 is moved to a position away from the tower main body 240.
  • the strut 27 and the lower jib 25a it is not necessary to disassemble them, so that the work efficiency can be improved.
  • by connecting the strut 27 and the lower jib 25a with the connecting member 12 during transportation it is possible to prevent the lower jib 25a from moving relative to the strut 27 during transportation.
  • the tower cap 24a is lifted when the tower cap 24a is connected to the tip of the tower main body 240 of the tower 24.
  • the posture of the tower cap 24a can be changed without significantly changing the posture of the entire integrated transport product 51. Therefore, it is possible to connect the tower cap 24a to the tower main body 240 while preventing the integrally transported product 51 from interfering with the surrounding members.
  • the lower jib 25a is moved toward the tower body 240 while the surface 27e on the lower jib 25a side of the strut 27 is supported by the roller 11. To the tower.
  • the posture of the tower cap 24a in a state where the back surface side portion of the tower cap 24a is connected to the tower main body 240 can be changed.
  • the posture of the tower cap 24a can be changed to a posture suitable for connecting the ventral side portion of the tower cap 24a and the tower main body 240. Therefore, the tower cap 24a can be easily connected to the tip end portion of the collapsed tower body 240.
  • the strut 27 and the lower jib 25a can be connected by the connecting member 12. Therefore, when the strut 27 and the lower jib 25a are connected during transportation, it is possible to prevent the lower jib 25a from moving relative to the strut 27 during transportation. As a result, it is possible to suppress the posture of the tower cap 24a from changing during transportation, so that it is possible to suppress the collapse of the load during transportation, and thus damage to each member is suppressed.
  • the roller 11 that is rotatable with respect to the lower jib 25a supports the surface 27e on the lower jib 25a side of the strut 27.
  • the rotation of the roller 11 that supports the surface 27e on the lower jib 25a side of the strut 27 allows the lower jib 25a to be suitably moved (slipped) relative to the strut 27.
  • the tower crane 1 is provided on the strut 27 side portion of the lower jib 25a (the upper surface portion of the lower jib 25a in FIG. 2), and guide rollers 3 and 4 capable of rolling on the ground are provided. Have. By rolling the guide rollers 3 and 4 on the ground, it becomes easy to change the direction of the lower jib 25a by approximately 180 degrees.
  • the tower cap 24a, the strut 27, and the lower jib 25a are integrally transported. As a result, it is not necessary to assemble or disassemble the tower cap 24a, the strut 27, and the lower jib 25a, so that the work efficiency can be improved.
  • the integrated transportation product 51 may not include the triangular guide 45.
  • a crane which is a crane body, a base end portion rotatably supported by the crane body in an undulating direction, and a tip portion opposite to the base end portion.
  • a boom including a boom body and a boom head detachably connected to the tip of the boom body, and the boom so as to be rotatable in an undulating direction around a horizontal first rotation center axis.
  • a jib having a lower jib supported by a boom head and a jib connector detachably connected to the tip of the lower jib, and the boom and the jib behind the lower jib in an upright position.
  • a strut supported by the boom head so as to be rotatable around a second rotation center axis parallel to the first rotation center axis and undulatingly support the jib, and a strut attached to the lower jib and mounted on the lower jib.
  • a support portion capable of supporting a portion on the tip side of the second rotation center axis is provided.
  • the strut and the lower jib are mounted on the boom head, and the strut is placed on the support portion, so that the strut, the lower jib, and the boom head form a connecting unit with respect to the crane body.
  • the connecting unit can be integrally connected to the tip of the collapsed boom body, and the boom head is arranged to face the tip of the collapsed boom body and the lower jib. Is rotatably supported by the boom head on the opposite side of the boom body across the boom head, and the struts are rotatably supported by the boom head above the lower jib and mounted on the support portion.
  • the connecting unit lifted so that it can be placed, the lower jib rotates around the first rotation center axis, the struts rotate around the second rotation center axis, and the struts rotate.
  • the support portion moves relative to the strut in the front-rear direction while contacting the support portion, so that the boom head can change its posture with respect to the boom body. Supports the struts.
  • the lower jib and struts can rotate respectively.
  • the posture of the boom head can be changed without significantly changing the posture of the entire connecting unit. Therefore, it is possible to connect the boom head to the boom body while suppressing the connecting unit from interfering with the surrounding members.
  • the boom main body is the first main body connecting portion arranged at the tip end portion of the boom main body and the tip end portion of the boom main body in a state where the boom main body is laid down with respect to the crane main body. It has a second main body connecting portion arranged below the first main body connecting portion, and the boom head can rotate around a third rotation central axis parallel to the first rotation central axis.
  • the second head of the boom head of the hoisted connecting unit having a first head connecting portion connected to the first main body connecting portion and a second head connecting portion connected to the second main body connecting portion.
  • the first head connecting portion is rotatably connected to the first main body connecting portion so that the head connecting portion is arranged apart from the second main body connecting portion of the boom main body in the front-rear direction. From this state, the boom head rotates around the third rotation center axis so that the second head connecting portion approaches the second main body connecting portion, and the posture of the boom body is changed with respect to the boom main body. Then, the lower jib rotates around the first rotation center axis, the strut rotates around the second rotation center axis, and the lower jib moves relative to the strut, and the second It is desirable for the support to support the strut so as to allow it to approach the body connection.
  • the first head connecting portion (rear side portion) of the boom head is connected to the first main body connecting portion of the boom body.
  • the lower jib is moved towards the boom body while the struts are supported by the support.
  • the posture of the boom head in a state where the first head connecting portion is connected to the boom body can be changed.
  • the posture of the boom head can be changed to a posture suitable for connecting the second head connecting portion (ventral surface side portion) of the boom head and the second main body connecting portion of the boom body. Therefore, the boom head can be easily connected to the tip of the collapsed boom body.
  • a movement blocking state in which the lower jib is prevented from moving relative to the strut in the front-rear direction while the strut is mounted on the support portion and the strut is mounted on the support portion.
  • a connecting member capable of connecting the strut and the lower jib to each other is further provided so that the lower jib can be switched to a movement-allowed state in which the lower jib is allowed to move relative to the strut in the front-rear direction. Is desirable.
  • the support portion includes an outer peripheral surface capable of supporting the strut, and the strut supported by the outer peripheral surface moves relative to the lower jib in the front-rear direction. It is desirable to have a rotatable support roller around a rotation axis parallel to one rotation center axis.
  • the lower jib can be stably moved (slipped) relative to the strut by the rotation of the support roller.
  • a rotating member mounted on the lower jib so that the boom can lie down with respect to the crane body and roll on the ground with the lower jib placed below the boom. It is desirable to further prepare.
  • the direction of the lower jib can be easily changed below the boom during assembly and disassembly.
  • a crane body a boom body including a base end portion rotatably supported by the crane body in an undulating direction, and a tip end portion opposite to the base end portion.
  • a boom having a boom head detachably connected to the tip of the boom body, and a lower jib supported by the boom head so as to be rotatable in an undulating direction around a horizontal first rotation center axis.
  • a jib having a jib connecting body detachably connected to the tip of the lower jib, and parallel to the first rotation center axis behind the boom and the lower jib in a state where the jib is upright.
  • the assembly method includes a preparatory step in which the strut and the lower jib are rotatably attached to the boom head to prepare a connecting unit composed of the boom head, the strut and the lower jib, and the crane main body.
  • the boom head is arranged to face the tip of the boom body that has been laid down, and the lower jib is rotatably supported by the boom head on the opposite side of the boom body with the boom head in between.
  • At least the boom head and the lower jib of the connecting unit are lifted and laid down so that the struts are rotatably supported by the boom head above the lower jib and placed on the support portion.
  • the first connecting step of connecting the back surface side portion of the boom head to the tip of the boom body so as to be rotatable around the third rotation center axis parallel to the first rotation center axis. While supporting a portion on the tip end side of the second rotation center axis with a support portion provided on the lower jib, the lower jib is moved relative to the strut toward the boom body, and the boom head is moved to the first.
  • a second connecting step for connecting is provided.
  • the lower jib and the strut are rotatable and the lower part, respectively. Since the jib can move relative to the strut, the posture of the boom head can be changed and the jib can be easily connected to the boom body without significantly changing the posture of the entire connecting unit.
  • the preparatory step includes transporting the boom head, the strut and the lower jib integrally as the connecting unit before the first connecting step.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)

Abstract

La présente invention concerne une grue et un procédé d'assemblage de grue qui sont capables de raccorder d'un seul tenant et facilement une flèche inférieure (25a), une entretoise (27) et une tête de flèche (24a) à la partie extrémité distale d'un corps de flèche replié (240). Une grue (1) comprend une partie support (2S) qui est fixée à la flèche inférieure (25a) et peut supporter l'entretoise (27). La partie support (2S) supporte l'entretoise (27) de telle sorte que, lorsqu'une unité de raccordement (51) est levée dans un état dans lequel la tête de flèche (24a) est disposée en regard de la partie extrémité distale du corps de flèche replié (240), et la flèche inférieure (25a) et l'entretoise (27) sont supportées de manière rotative par la tête de flèche (24a), la flèche inférieure (25a) peut se déplacer par rapport à l'entretoise (27) dans la direction avant-arrière lorsque la position de la tête de flèche (24a) change par rapport au corps de flèche (240).
PCT/JP2020/020322 2019-06-07 2020-05-22 Grue et procédé d'assemblage de grue WO2020246267A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG11202112743YA SG11202112743YA (en) 2019-06-07 2020-05-22 Crane and crane assembling method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-107285 2019-06-07
JP2019107285A JP7306080B2 (ja) 2019-06-07 2019-06-07 クレーン、および、クレーンの組立方法

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WO2020246267A1 true WO2020246267A1 (fr) 2020-12-10

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JP (1) JP7306080B2 (fr)
SG (1) SG11202112743YA (fr)
WO (1) WO2020246267A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024013760A (ja) * 2022-07-21 2024-02-01 コベルコ建機株式会社 クレーン、および、クレーンの組立方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014065573A (ja) * 2012-09-26 2014-04-17 Kobelco Cranes Co Ltd 下部ジブ
JP2014114101A (ja) * 2012-12-07 2014-06-26 Kobelco Cranes Co Ltd クローラクレーンにおけるブームヘッドの分解輸送方法
JP2016222392A (ja) * 2015-05-29 2016-12-28 コベルコクレーン株式会社 移動式クレーン及び移動式クレーンのブーム起立方法
JP2017137164A (ja) * 2016-02-03 2017-08-10 コベルコクレーン株式会社 クレーンのジブ取付方法
JP2019069838A (ja) * 2017-10-06 2019-05-09 住友重機械建機クレーン株式会社 クレーン、ジブ組立て方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014065573A (ja) * 2012-09-26 2014-04-17 Kobelco Cranes Co Ltd 下部ジブ
JP2014114101A (ja) * 2012-12-07 2014-06-26 Kobelco Cranes Co Ltd クローラクレーンにおけるブームヘッドの分解輸送方法
JP2016222392A (ja) * 2015-05-29 2016-12-28 コベルコクレーン株式会社 移動式クレーン及び移動式クレーンのブーム起立方法
JP2017137164A (ja) * 2016-02-03 2017-08-10 コベルコクレーン株式会社 クレーンのジブ取付方法
JP2019069838A (ja) * 2017-10-06 2019-05-09 住友重機械建機クレーン株式会社 クレーン、ジブ組立て方法

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JP2020200137A (ja) 2020-12-17
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