JP2012148848A - Adapter for raising mast, mast raising gear and winch detaching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a substantial reduction in installation space for equipment on a turning frame and a substantial increase in layout restriction for the equipment, while facilitating detachment of a winch mounted under a mast on the turning frame of a crane.SOLUTION: An adaptor body 24 of an adaptor 8 for raising a mast has an arm support 24c that supports an arm 22 so that the arm 22 can be relatively displaced in relation to the adaptor body 24 between the support position and the retracted position. When the arm 22 is in the support position, the arm 22 protrudes more rearward than a normal mast support part 24b when the adaptor body 24 is arranged in a standard position so that the normal mast support part 24b extends rearward. When the arm 22 is in the retracted position, the leading end of the arm 22 is arranged in a position more forward than the position of the leading end of the arm 22 when the adaptor body 24 is arranged in the standard position while the arm 22 is in the support position.

Description

  The present invention relates to a mast hoisting adapter for a crane, a mast hoisting device, and a winch removing method using the mast hoisting adapter.

  2. Description of the Related Art Conventionally, a crane on which a mast for supporting a boom that can be raised and lowered on an upper swing body is mounted is known. In this crane, the base end portion of the mast is attached to the front portion of the swing frame that is the frame of the upper swing body of the crane so as to be rotatable about a horizontal axis extending in the width direction of the swing frame. The mast can be raised and lowered with its base end as a fulcrum. A mast hoisting cylinder for raising the mast and a hoisting arm coupled to the tip of the mast hoisting cylinder are provided at the front part of the swivel frame. The hoisting arm is attached to the front of the swivel frame so that it can be turned up and down around an axis extending in the width direction of the swivel frame, and the linear telescopic motion of the mast hoisting cylinder is converted into a turning motion. And is provided for transmission to the mast. That is, the mast hoisting cylinder rotates the hoisting arm upward about an axis extending in the width direction of the swivel frame and causes the hoisting arm to push up a predetermined rear portion from the base end portion (front end portion) of the mast. As a result, the mast is raised with its base end as a fulcrum. A winch for hoisting or lowering a hook device suspended from the tip of the boom or a boom raising / lowering operation is provided on a portion of the swivel frame located below the mast with the mast lying backward. Winch is installed.

  When a crane having such a configuration is transported to a work site or the like, the equipment is removed from the swivel frame in order to satisfy the requirements of the limit weight and limit dimension that can be loaded on the transport vehicle. Of these equipment, each winch is located below the mast lying in a backward position, so if you try to lift each winch and remove it from the swivel frame, you avoid interference between the mast and the winch. In order to do this, it is necessary to remove the mast from the revolving frame, which is complicated and requires a lot of work time.

  Therefore, Patent Document 1 below proposes various technologies that can remove a winch mounted on a portion of the swivel frame located below the mast without removing the mast from the swivel frame. Yes. As one of these techniques, Patent Document 1 describes a technique for forming a winch removal gap between a mast base end and a swivel frame using a mast hoisting cylinder and a hoisting arm. . This technology releases the connection between the base end of the mast that is lying backward and the front part of the swivel frame, and connects a predetermined part on the tip side of the mast to the rear part of the swivel frame. As a fulcrum, the mast hoisting cylinder pushes up the base end side of the mast via the hoisting arm to form a winch removing gap between the mast base end and the upper surface of the revolving frame. With this technology, the winch mounted on the swivel frame can be removed through the gap formed between the base end of the mast and the upper surface of the swivel frame without removing the mast from the swivel frame. It becomes possible to shorten the working time related to simplification and removal work. Further, according to this technique, a gap for removing the winch is formed between the base end portion of the mast and the upper surface of the swivel frame using the mast hoisting cylinder, and thus an apparatus for forming the gap, for example, It is possible to form the gap for removing the winch without separately installing an auxiliary crane or the like for lifting the base end portion of the mast.

JP 2007-238262 A

  Incidentally, in the technique described in Patent Document 1, it is preferable to increase the length of the hoisting arm in order to make it easier to remove the winch from the turning frame. Specifically, if the length of the hoisting arm is large, the mast hoisting cylinder pushes up the base end portion of the mast through the hoisting arm, and the winch is taken out between the base end portion of the mast and the upper surface of the swivel frame. When forming the gap, the base end of the mast can be pushed up to a higher position to make the winch removal gap larger, making it easier to remove the winch through the gap. it can.

  However, when the length of the hoisting arm is increased, the installation space for other equipment mounted on the swivel frame is reduced, and there is a problem that restrictions on the layout of the equipment are increased.

  Specifically, when the mast hoisting cylinder is in a contracted state and the mast is in a posture in which the mast is tilted backward, the hoisting arm is disposed in a posture extending rearward from the front end portion of the turning frame. When the length of the hoisting arm is large, the space between the hoisting arm and other equipment is avoided, so that the installation space for the other equipment on the swivel frame is reduced and the restrictions on the layout are increased.

  The present invention has been made to solve the above-described problems, and its object is to make it easier to remove a winch mounted under a mast on a swing frame of a crane and It is to prevent a significant reduction in the installation space of the equipment and a significant increase in the constraints on the layout of the equipment.

  In order to achieve the above object, a mast raising and lowering adapter according to the present invention includes a lower body, a turning frame that is turnably mounted on the lower body, a mast extending in a specific direction, and a front portion of the turning frame. Provided so as to be detachably coupled to the base end portion of the mast so that the base end portion of the mast can rotate about a horizontal axis extending in a width direction perpendicular to the front-rear direction of the swivel frame in the coupled state. A support shaft that supports the base end of the swivel frame, and a mast positioned in a lying position so as to extend rearward of the swivel frame with the support shaft as a fulcrum. A winch mounted on the part, a cylinder body attached to the front of the revolving frame, and an operation of moving forward and backward with respect to the cylinder body along the axial direction of the cylinder body From the base end portion of the mast that is driven by the operating portion that advances from the cylinder body and is in the lying posture. When the support shaft is connected to the base end of the mast, the mast is raised with the support shaft as a fulcrum, while the support shaft and the base end of the mast are A mast raising and lowering adapter for lifting the base end of the mast upward from the revolving frame when the connection with the part is released, and the adapter rotates around an axis extending in the width direction of the revolving frame It is attached to the front part of the swivel frame so that it can be connected to the operating part at a part located behind the attaching part and rotated up and down according to the advancement and retraction of the operating part. An adapter main body, and an arm that pivots together with the adapter main body to push up the mast from below when the base end portion of the mast in the lying posture is separated upward from the revolving frame. A mast normal support portion that rotates together with the adapter body to push up the mast from below when the mast in the lying posture is raised with the support shaft as a fulcrum, and when the arm pushes up the mast from below An arm support portion that supports the arm so as to be displaceable relative to the adapter main body between a support position that is disposed and a retracted position that is disposed when the mast is not pushed up; When the arm is in the support position, the arm is connected to the adapter so that the mast normal support portion extends rearward. When the main body is arranged at a specific rotation position and protrudes rearward from the mast normal support portion, and the arm is in the retracted position, the tip of the arm is at the support position. In this state, the adapter body is disposed at a position ahead of the position of the tip of the arm when the adapter body is disposed at the specific rotation position.

  A winch removing method according to the present invention is a winch removing method for removing the winch mounted on the swivel frame using the mast raising and lowering adapter, wherein the mast is mounted on the support shaft and in the lying posture. After the coupling release step for releasing the coupling with the end portion, the arm displacement step for displacing the arm from the retracted position to the support position, and after the coupling release step and the arm displacement step, the operating portion of the hoisting cylinder Is advanced from the cylinder body, the arm is rotated together with the adapter body, and the mast in the lying posture is pushed up from below by the tip of the arm so that the base end portion of the mast is separated from the turning frame upward. A separating step for causing the winch mounted on the revolving frame to move the base of the mast after the separating step. Parts and through the gap between the upper surface of the rotating frame and a winch removal step of removing from the said pivoting frame (claim 7).

  In this mast hoisting adapter and a winch removing method using the same, the arm is placed between the support position and a retracted position where the tip of the arm is disposed forward of the position of the tip of the arm at the support position. Since it is possible to displace, it is possible to easily remove the winch mounted under the mast on the swivel frame, greatly reduce the installation space for other equipment on the swivel frame, and It is possible to achieve both a significant increase in the restrictions on the layout of the equipment. Specifically, when the winch is removed from the swivel frame, if the arm is displaced from the retracted position to the support position, the amount of protrusion of the arm from the adapter body can be increased. At the same time, the arm can push up the base end portion of the mast to form a large gap between the base end portion of the mast and the upper surface of the revolving frame. As a result, the winch can be easily removed through a large gap formed between the base end portion of the mast and the upper surface of the swivel frame. On the other hand, when holding the mast in the lying posture and retracting the operating part of the hoisting cylinder to the cylinder body side and holding the adapter body at the specific rotation position, the arm is arranged at the retracted position, The amount of protrusion to the rear of the arm can be suppressed. As a result, it is not necessary to secure a large space on the swivel frame in order to avoid interference between the arm and other equipment on the swivel frame, greatly reducing the installation space for other equipment on the swivel frame and those It is possible to prevent a significant increase in the layout constraints of the equipment.

  In the mast raising and lowering adapter, the arm support portion supports the arm so that the arm can be displaced with respect to the adapter main body along the longitudinal direction, and the retracted position of the arm is the support position. A specific position where the arm is retracted from the position toward the adapter main body along the longitudinal direction may be used (Claim 2).

  In this configuration, if the arm is displaced from the support position to the retracted position with the arm arranged in a posture extending in the front-rear direction, the tip of the arm is displaced forward along the longitudinal direction of the arm. An arm support portion for supporting the arm so that the arm is displaceable between the support position and a retracted position where the tip of the arm is disposed in front of the tip position of the arm at the support position. A specific structure can be configured.

  In the mast raising and lowering adapter, the arm support portion supports the arm so that the arm is rotatable with respect to the adapter main body about an arm rotation axis extending in a width direction of the swivel frame, The retracted position of the arm may be a specific position where the arm is rotated about the arm rotation axis so that the tip of the arm is displaced downward from the support position.

  In this configuration, in a state where the arm at the support position is arranged in a posture extending in the front-rear direction, the arm is rotated around the arm rotation axis so that the tip of the arm is displaced downward, and is arranged at the retracted position. Then, the tip of the arm is displaced forward. Therefore, according to this configuration, the arm can be displaced between the support position and the retracted position where the tip of the arm is disposed in front of the tip position of the arm at the support position. The concrete structure of the arm support part which supports can be comprised.

  In the mast raising and lowering adapter, the arm extends in the longitudinal direction of the arm, and is rotatable about an arm main body supported by the arm support portion and an axis extending in the width direction of the swivel frame at the tip of the arm main body. It is preferable to have a roller that contacts the lower surface of the mast when the arm supports the mast from below (Claim 4).

  According to this configuration, when the arm rotates together with the adapter body and pushes the base end of the mast away from the revolving frame, the roller at the tip of the arm is in contact with the lower surface of the mast and the lower surface Therefore, damage to the lower surface of the mast and the tip of the arm can be prevented, and the mast can be pushed up smoothly.

  The mast hoisting device according to the present invention is arranged in a lower body, a swivel frame that is pivotably mounted on the lower body, and arranged side by side in a width direction extending in a specific direction and perpendicular to the front-rear direction of the swivel frame. A mast having a first mast main body and a second mast main body connected so as to be integrated with each other, and a removably coupled to a base end portion of both the mast main bodies provided at a front portion of the revolving frame, and a coupled state thereof A support shaft for supporting the base end portions of the mast main bodies so that the base end portions of the mast bodies can rotate about a horizontal axis extending in the width direction of the swivel frame, and the mast uses the support shaft as a fulcrum. A crane having a winch mounted on a portion of the swivel frame that is positioned below the mast in a lying posture that extends to the rear of the swivel frame. When the support shaft is in a coupled state with the base ends of the both mast bodies, the mast in the lying posture is raised with the support shaft as a fulcrum, while the base of the support shaft and the both mast bodies is A mast hoisting device for separating a base end portion of the mast upward from the swivel frame when the connection with the end portion is released, wherein the first mast main body of the swivel frame is attached to the first mast main body. A first cylinder body mounted at a corresponding position, and a first operating portion that moves forward and backward with respect to the first cylinder body along the axial direction of the first cylinder body; A first undulating cylinder, a second cylinder body attached to a position corresponding to the second mast body in the front portion of the revolving frame, and the second cylinder body along the axial direction of the second cylinder body. A second operating part that moves forward and backward with respect to the cylinder body, and is driven by the second hoisting cylinder that expands and contracts by the advancement and retraction of the second operating part; Corresponds to the mast hoisting adapter that pushes up a portion of the first mast main body in a posture located behind the base end, and the base end of the second mast main body in the front part of the swivel frame When the mast raising / lowering adapter is attached to the position where the mast raising / lowering shaft can rotate about the same axis as the adapter main body, and the support shaft is coupled to the base ends of the mast main bodies, the second cylinder Driven by the operating part that advances from the main body and rotates so as to synchronize with the adapter main body, the rear side of the second mast main body that is in the lying down posture with respect to the base end. The portion to be positioned is pushed up and the second mast main body is raised with the support shaft as a fulcrum, and the mast raising / lowering adapter pushes up the first mast main body to separate the base end of the mast upward from the swivel frame. In some cases, a mast raising / lowering sub-adapter is provided that stays at a position where a gap is formed in the vertical direction between the second mast main body and the base end of the second mast body that moves upward.

  Since this mast hoisting device is provided with the mast hoisting adapter, it is possible to easily remove the winch mounted on the swivel frame and to greatly increase the installation space for the equipment on the swivel frame. It is possible to obtain the same effect as the effect of the mast undulating adapter that can prevent a significant reduction and a significant increase in restrictions on the layout of the equipment. In this mast raising and lowering device, when the mast is raised with the support shaft as a fulcrum, both the first mast main body and the second mast main body are pushed up from below by the mast hoisting adapter and the mast hoisting subadapter. While holding the mast in a stable state in the width direction, the mast can be erected with the support shaft as a fulcrum. On the other hand, when the mast raising / lowering adapter pushes up the first mast main body and separates the base end of the mast in the inverted posture upward from the swivel frame, the second mast moves upward together with the base end of the first mast main body. Since a gap is formed in the vertical direction between the base end portion of the main body and the mast raising and lowering sub-adapter, even when the winch has a portion protruding to the second mast main body side in the width direction of the turning frame, When the winch is removed, the protruding portion of the winch can be released to the outside of the swivel frame through a gap formed between the base end portion of the second mast body and the mast raising / lowering sub-adapter. Therefore, according to this configuration, even when the winch has a portion protruding toward the second mast main body in the width direction of the turning frame, interference between the protruding portion of the winch and the mast raising / lowering sub-adapter is avoided. However, the winch can be easily detached from the turning frame to the outside.

  In the mast raising and lowering device, when the mast in the lying posture is raised with the support shaft as a fulcrum, the first operating part is advanced from the first cylinder body and the second operating part is moved to the second cylinder body. When the base end portion of the mast is moved away from the revolving frame, only the first operating portion is moved away from the first cylinder main body without moving the second operating portion out of the second cylinder main body. It is preferable to further include a cylinder control device to advance (claim 6).

  When the base end of the mast is moved away from the swivel frame, it is not necessary to drive the mast raising / lowering sub-adapter. Therefore, the first operation is performed without causing the second operation portion to advance from the second cylinder body as in this configuration. If only the part is advanced from the first cylinder body, the power can be reduced as compared with the case where both the first operating part and the second operating part are advanced.

  As described above, according to the present invention, it is possible to more easily remove the winch mounted under the mast on the swing frame of the crane, and to greatly increase the installation space for the equipment on the swing frame. Reductions and significant increases in the constraints on the layout of these equipment can be prevented.

1 is a side view of a crane provided with a mast raising / lowering adapter and a mast raising / lowering device including the same according to a first embodiment of the present invention. It is a figure which shows the state at the time of the self-supporting assembly of the crane shown in FIG. It is the figure which looked at the upper revolving body from the top when it is in the lying posture where the mast has fallen backward. FIG. 4 is a side view of the upper swing body shown in FIG. 3. It is a figure which shows the state when removing a winch from the upper turning body shown in FIG. It is a figure which shows the control system of the 1st hoisting cylinder and the 2nd hoisting cylinder of the mast hoisting device by 1st Embodiment of this invention. It is a side view of the state which has the arm of the mast raising / lowering adapter by 1st Embodiment of this invention in a support position. It is the figure which looked at the adapter for mast raising and lowering shown in FIG. 7 from the top. It is a side view in the state where the arm of the mast raising and lowering adapter according to the first embodiment of the present invention is in the retracted position. It is the figure which looked at the mast raising / lowering adapter shown in FIG. 9 from the top. It is a figure which shows the state which the mast raising adapter is in a reference position and the mast normal support part is supporting the mast in a lying posture in the mast raising apparatus by 1st Embodiment of this invention. It is a figure which shows the state which has the arm in a support position in the mast raising / lowering apparatus shown in FIG. 11, and has pushed up the base end part side of the mast. It is a side view of the state which has the arm of the adapter for mast raising / lowering by 2nd Embodiment of this invention in a support position. It is the figure which looked at the adapter for mast raising and lowering shown in FIG. 13 from the top. It is a side view in the state where the arm of the mast raising and lowering adapter according to the second embodiment of the present invention is in the retracted position. It is the figure which looked at the mast raising / lowering adapter shown in FIG. 15 from the top. It is a figure which shows the state which the mast raising adapter is in a reference position, and the mast normal support part is supporting the mast in a lying posture in the mast raising apparatus by 2nd Embodiment of this invention. It is a figure which shows the state at the time of starting pushing up of the base end part side of a mast in the mast raising / lowering apparatus shown in FIG. It is a figure which shows the state which pushed up the base end part side of the mast in the mast raising / lowering apparatus shown in FIG. It is a figure which shows the state which pushed up the base end part side of the mast further in the mast raising / lowering apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-12, the structure of the mast raising / lowering apparatus 2 by 1st Embodiment of this invention and the mast raising / lowering adapter 8 contained in the raising / lowering apparatus 2 is demonstrated.

  The mast hoisting device 2 according to the first embodiment is provided in a crawler crane as shown in FIG. The crane includes a lower traveling body 102, a turning frame 104, a boom 106, a main winding hook device 108, an auxiliary winding hook device 110, a mast 112, a first mast foot pin 114a (see FIG. 4), A second mast foot pin 114b (see FIG. 2), a main winding winch 116, an auxiliary winding winch 118, a boom hoisting winch 120, an upper spreader 122, and a lower spreader 124 are provided.

  The lower traveling body 102 is included in the concept of the lower main body of the present invention. The lower traveling body 102 includes a lower frame 102a (see FIG. 2) and crawlers 102c that are respectively attached to axles 102b protruding on both sides of the lower frame 102a.

  The turning frame 104 is mounted on the lower frame 102a of the lower traveling body 102 so as to be turnable around the vertical axis. The revolving frame 104 includes a bottom plate 104a (see FIG. 3), two side wall portions 104b, two boom support portions 104c, and two mast support portions 104d.

  The bottom plate 104a constitutes the bottom surface of the turning frame 104, and is a portion of the turning frame 104 that is mounted on the lower frame 102a.

  The two side wall portions 104b are formed in the same shape and extend in the front-rear direction of the revolving frame 104 in parallel with each other. The two side wall portions 104b are arranged separately on both sides in the width direction of the bottom plate 104a and are erected on both ends in the width direction of the bottom plate 104a. That is, the both side wall portions 104b are arranged apart from each other in the width direction orthogonal to the front-rear direction (longitudinal direction) of the swivel frame 104.

  The two boom support portions 104 c are for supporting the boom 106. One boom support portion 104c is provided at each front end portion of each side wall portion 104b. The two boom support parts 104c have the same structure. Each boom support portion 104c includes two plate-like boom support portion plate bodies 104e that are spaced apart from each other in the width direction of the revolving frame 104. Each boom support plate 104e is provided with a boom support hole 104f (see FIG. 4) penetrating the plate in the thickness direction (width direction of the turning frame 104).

  The two mast support portions 104d are for supporting the mast 112. A flat plate-like support portion installation portion extends from the side wall portion 104b to the inner side in the width direction of the revolving frame 104 at a position slightly behind the boom support portion 104c in the upper surface of the front portion of each side wall portion 104b. 104h (see FIG. 3) is provided. One mast support portion 104d is provided on each support portion installation portion 104h, and each mast support portion 104d is disposed at a position on the inner side in the width direction of the revolving frame 104 with respect to each side wall portion 104b. Has been. The two mast support portions 104d have the same structure, and each mast support portion 104d has two mast support portion plate bodies 104g and two bushes 104i.

  The two mast support part plate bodies 104g of each mast support part 104d are each formed in a flat plate shape extending in the front-rear direction and the vertical direction of the turning frame 104, and are erected on the support part installation part 104h. Further, the two mast support portion plate bodies 104g are separated from each other in the width direction of the turning frame 104 and are arranged in parallel to each other. Each mast support plate 104g is provided with a mast support hole 104k (see FIG. 4) that passes through the plate in the thickness direction (width direction of the turning frame 104). The mast support holes 104k of these mast support plate members 104g are arranged so as to be coaxial.

  The two bushes 104i of each mast support portion 104d are fitted in the mast support holes 104k of the corresponding one of the two mast support portion plate bodies 104g of the mast support portion 104d. Each bush 104i has a through hole 104m (see FIG. 11) that is coaxial with the mast support hole 104k. Each bush 104i protrudes from the side face toward the other mast support part plate 104g side of one mast support part plate 104g to which it is attached. That is, each bush 104i protrudes from the mutually opposing side surfaces of the two mast support part plate bodies 104g arranged in parallel to each other. The portion of each bush 104i that protrudes from the mast support plate 104g has a cylindrical outer peripheral surface that is coaxial with each other and coaxial with the mast support hole 104k.

  The boom 106 (see FIG. 1) has two boom feet (not shown) arranged at a base end portion spaced apart by a distance corresponding to the two boom support portions 104c in the width direction of the revolving frame 104. Each boom foot is provided with a hole (not shown) penetrating in the width direction of the revolving frame 104. Each boom foot is inserted between two boom support plate bodies 104e of the corresponding boom support portion 104c and provided in the boom support hole 104f provided in the two boom support plate bodies 104e and the boom foot. A boom foot pin (not shown) is inserted into the hole to be connected to the boom support portion 104c. The boom 106 can be raised and lowered with a boom foot pin as an axis.

  The main winding hook device 108 is suspended from the tip of the boom 106 via the main winding rope 108a, and the auxiliary winding hook device 110 is suspended from the tip of the boom 106 via the auxiliary winding rope 110a. These hook devices 108 and 110 are for hanging suspended loads.

  The mast 112 extends in a specific direction. The masts 112 are arranged apart from each other by a distance corresponding to the two mast support portions 104d in the width direction of the turning frame 104, and are parallel to each other and extend in the longitudinal direction of the mast 112. 2 mast main body 112b (refer FIG. 3), and the front-end | tip connection part 112c which connects the front-end | tip parts of those mast main bodies 112a and 112b. A base end portion of the mast 112, that is, a base end portion 112d of the first mast main body 112a and a base end portion 112e of the second mast main body 112b, are holes 112f penetrating in the width direction of the turning frame 104 (see FIG. 5). Are provided, and the holes 112f are arranged so as to be coaxial. And since both the mast main bodies 112a and 112b are connected so that their front ends are integrated with each other by a front end connecting portion 112c, only the base end portion 112d side of the first mast main body 112a is to be described later. Even when pushed up, the base end portions 112d and 112e of the mast main bodies 112a and 112b are similarly displaced upward. Further, a stopper 112h is provided on the lower surface of the first mast main body 112a that is slightly closer to the distal end than the base end portion 112d (the lower surface in a state where the first mast main body 112a is in the backward lying posture). ing. The stopper 112h is in contact with the distal end of the arm 22 when the distal end of an arm 22 (to be described later) of the mast raising / lowering adapter 8 pushes up the proximal end 112d side of the first mast main body 112a, and the distal end of the stopper 112h is further The one-mast main body 112a is prevented from moving toward the base end side.

  The first mast foot pin 114 a and the second mast foot pin 114 b are respectively attached to corresponding ones of the two mast support portions 104 d of the turning frame 104 and support the base end portion of the mast 112. These mast foot pins 114a and 114b are included in the concept of the support shaft of the present invention. The first mast foot pin 114a is detachably coupled to the base end portion 112d of the first mast main body 112a and one mast support portion 104d corresponding thereto, and the second mast foot pin 114b is a base of the second mast main body 112b. The end portion 112e and the other mast support portion 104d corresponding thereto are detachably coupled. Specifically, the base end portion 112d of the first mast main body 112a is inserted between the two mast support portion plate bodies 104g of one mast support portion 104d and between the two bushes 104i of the mast support portion 104d. The first mast foot pin 114a has a through hole 104m in the bush 104i and a first mast main body fitted in the mast support hole 104k of each mast support portion plate body 104g in a posture in which the axis extends in the width direction of the revolving frame 104. It is inserted in the hole 112f of the base end 112d of 112a. The first mast foot pin 114a can be inserted into and removed from the through hole 104m and the hole 112f of the bush 104i. Further, the base end portion 112e of the second mast main body 112b is inserted between the two mast support portion plate bodies 104g of the other mast support portion 104d and between the two bushes 104i of the mast support portion 104d. The two mast foot pins 114b have a shaft extending in the width direction of the revolving frame 104 and the through holes 104m of the bushes 104i fitted into the mast support holes 104k of the mast support plate 104g and the second mast main body 112b. The base end 112e is inserted into the hole 112f. The second mast foot pin 114b can be inserted into and removed from the through hole 104m and the hole 112f of the bush 104i.

  The first mast foot pin 114a is coupled to the base end portion 112d of the first mast main body 112a and the corresponding one mast support portion 104d, and the base end portion 112d of the first mast main body 112a is connected to the revolving frame 104. The base end 112d is supported so as to be rotatable about a horizontal axis extending in the width direction (the left-right direction of the swivel frame 104), and the second mast foot pin 114b is the base end of the second mast main body 112b. 112e and the other mast support portion 104d corresponding thereto, the base end portion 112e of the second mast body 112b rotates about a horizontal axis extending in the width direction of the revolving frame 104 (left and right direction of the revolving frame 104). The base end 112e is supported so that it becomes possible. Thus, by supporting the base end portions 112d and 112e by the mast foot pins 114a and 114b, the mast 112 can be raised and lowered with the mast foot pins 114a and 114b as fulcrums.

  As shown in FIG. 3, the main winding winch 116, the auxiliary winding winch 118, and the boom hoisting winch 120 are provided at a position on the rear side of the mast support portion 104d between the two side wall portions 104b of the revolving frame 104. They are arranged in this order from the front to the rear of the swivel frame 104. Each of the winches 116, 118, and 120 is provided in a portion of the swivel frame 104 that is positioned below the mast 112 that is in a lying posture that has fallen backward. The main winding winch 116 winds / unwinds the main winding hook device 108 by winding / unwinding the main winding rope 108a, and the auxiliary winding winch 118 winds / unwinds the auxiliary winding rope 110a. The auxiliary hook device 110 is wound up / down by performing the above. In addition, the boom hoisting winch 120 raises and lowers the boom 106 by winding and unwinding the boom hoisting rope 121. Each winch 116, 118, 120 has drums 116a, 118a, 120a for winding the corresponding ropes 108a, 110a, 121, and motors 116b, 118b, 120b for driving the drums 116a, 118a, 120a. I have. Each of the drums 116 a, 118 a, and 120 a is disposed so that the rotation shaft extends in the width direction of the revolving frame 104. Also, each motor 116b, 118b, 120b is attached to the outside of one end in the axial direction with respect to the corresponding drum 116a, 118a, 120a, and the second mast body of the mast 112 in the above-mentioned lying posture. It is located directly below 112b. In addition, each winch 116, 118, 120 is attached to the revolving frame 104 so as to be detachable by a coupling member (not shown).

  The upper spreader 122 is provided at the tip connecting portion 112 c of the mast 112. The upper spreader 122 has a plurality of upper sheaves 122 a provided so as to be rotatable around an axis extending in the width direction of the revolving frame 104. The upper spreader 122 is connected to the tip of the boom 106 through a guy line 123. The lower spreader 124 is provided at the rear end of the turning frame 104. The lower spreader 124 has a plurality of lower sheaves 124 a provided so as to be rotatable around an axis extending in the width direction of the turning frame 104. In a state where the crane performs a normal crane operation (see FIG. 1), the boom hoisting rope 121 drawn from the drum 120a of the boom hoisting winch 120 is connected to the upper sheave 122a of the upper spreader 122 and the lower sheave 124a of the lower spreader 124. It is hung around. When the boom hoisting winch 120 winds up the boom hoisting rope 121, the upper spreader 122 is pulled toward the lower spreader 124, whereby the mast 112 falls rearward and the rear end of the boom 106 is moved back via the guy line 123. To raise the boom 106. On the other hand, when the boom hoisting winch 120 extends the boom hoisting rope 121, the mast 112 falls forward while supporting the weights of the boom 106, the hook devices 108, 110 and the suspended load via the guy line 123. 106 falls forward.

  Since the crane configured as described above is loaded and transported on a transport vehicle when transported to a work site or the like, the crane falls within the limit size and limit weight suitable for transport by the transport vehicle. Each component is disassembled and transported. At this time, the boom 106, the hook devices 108 and 110, the guy line 123, and other equipment are removed from the crane in the state shown in FIG. 1, and the ropes 108a, 110a, and 121 that have been passed are removed. As shown in FIG. 4, the mast 112 is wound around each winch 116, 118, and 120, and is placed in a lying posture where the mast footpins 114 a and 114 b lie on the back as shown in FIG. 4. Since the mast 112 and the swivel frame 104 have a length close to each other, they are transported in a state of being connected to each other. On the other hand, since each winch 116, 118, 120 mounted on the turning frame 104 is heavy, it is removed from the turning frame 104 in the state of FIG. 4 and transported separately. At this time, as will be described later, the mast hoisting device 2 is used to remove the winches 116, 118, 120 from the turning frame 104 while avoiding interference with the mast 112.

  In addition, this crane is configured so that it can be assembled by itself without using other auxiliary cranes after the components are transported to a work site or the like. For example, as shown in FIG. 2, the crawler 102c can be lowered from the transport vehicle 200 and attached to the axle 102b by the constituent members of the crane. Specifically, the mast 112 is set in a standing state in which the boom 106 is tilted forward in a state where the boom 106 is not attached to the revolving frame 104. Then, the crawler 102c on the transport vehicle 200 is hung from the tip of the mast 112 through the lifting tool 150 to lower the crawler 102c from the transport vehicle 200, and the crawler 102c is attached to the axle 102b while keeping the lifted state. To do. In order to carry out this work, it is necessary to stand up the mast 112 in the lying posture as shown in FIG. 4 with the mast foot pins 114a and 114b as fulcrums as shown in FIG. The standing operation of the mast 112 is performed.

  Next, the configuration of the mast hoisting adapter 8 according to the first embodiment and the mast hoisting device 2 having the same will be described in detail.

  As described above, the mast raising and lowering device 2, after the mast 112 and the swivel frame 104 connected to each other are transported, the mast 112 that is in the lying position to perform the self-assembling operation of the crane is moved to the mast footpins 114 a, The base end of the mast 112 to stand up with the support 114b as a fulcrum or to remove the winches 116, 118, 120 located below the mast 112 lying backward from the swivel frame 104 while avoiding interference with the mast 112 Is used to separate the frame from the swivel frame 104 upward. In other words, the mast raising / lowering device 2 is configured such that when the mast foot pins 114a and 114b are coupled to the base ends 112d and 112e of the mast main bodies 112a and 112b, the mast 112 in the lying posture is moved to the mast foot pins 114a and 114b. While the mast foot pins 114a, 114b and the base end portions 112d, 112e of the mast main bodies 112a, 112b are uncoupled, the base end portions of the mast main bodies 112a, 112b in the lying posture 112 d and 112 e are separated upward from the turning frame 104, and a gap is formed between the base end portions 112 d and 112 e and the upper surface of the turning frame 104.

  The mast hoisting device 2 includes a first hoisting cylinder 4 (see FIGS. 4 and 5), a second hoisting cylinder 6 (see FIG. 2), a mast hoisting adapter 8 (see FIG. 5), and a mast hoisting sub. An adapter 10 (see FIG. 2) and a cylinder control device 12 (see FIG. 6) are provided.

  The first hoisting cylinder 4 is a hydraulic cylinder for driving the mast hoisting adapter 8. The first hoisting cylinder 4 is included in the concept of the hoisting cylinder of the present invention. The first hoisting cylinder 4 is provided at a lower position in the vicinity of the base end portion 112 d of the first mast main body 112 a in the front portion of the revolving frame 104. The first undulation cylinder 4 includes a first cylinder body 4a and a first operating part 4b.

  The first cylinder body 4 a is a hollow cylinder attached to a position corresponding to the first mast body 112 a in the front portion of the revolving frame 104. The first cylinder body 4a is included in the concept of the cylinder body of the present invention. The base end portion of the first cylinder body 4a is coupled to a mounting portion (not shown) provided on the bottom plate 104a of the revolving frame 104 by a pin, and around the axis extending in the width direction of the revolving frame 104 by the pin. It is supported so that it can rotate. As shown in FIG. 6, the first cylinder body 4a is connected to the cylinder controller 12 via a hydraulic pipe 12a. The cylinder controller 12 controls the supply and discharge of the pressure oil into the first cylinder body 4a through the hydraulic pipe 12a.

  The first operating part 4b advances and retreats with respect to the first cylinder body 4a along the axial direction of the first cylinder body 4a. The first operating portion 4b is included in the concept of the operating portion of the present invention. The first operating portion 4b is coupled to the piston portion (not shown) accommodated in the first cylinder main body 4a so as to be movable in the axial direction, and is coupled to the piston portion. 4a (refer FIG. 5) which extends so that it may protrude from the said 1st cylinder main body 4a along the axial direction of 4a. The piston portion moves along the axial direction in the first cylinder body 4a in accordance with the control of the supply and discharge of the pressure oil to the first cylinder body 4a by the cylinder control device 12. When the piston part is moved to the tip end side of the first cylinder body 4a, the first rod part 4d moves so as to advance from the first cylinder body 4a, and the piston part moves to the base of the first cylinder body 4a. When moved to the end side, the first rod portion 4d moves so as to retract into the first cylinder body 4a.

  The second hoisting cylinder 6 is a hydraulic cylinder similar to the first hoisting cylinder 4 and is used to drive the mast hoisting sub-adapter 10. The second hoisting cylinder 6 is provided at a lower position in the vicinity of the base end portion 112e of the second mast main body 112b in the front portion of the revolving frame 104. The second hoisting cylinder 6 is similar to the first cylinder main body 4a of the first hoisting cylinder 4 (see FIG. 2) and the first operating portion 4b of the first hoisting cylinder 4. And a second actuating portion 6b configured. The second cylinder body 6a is connected to the cylinder control device 12 via a hydraulic pipe 12b. Moreover, the 2nd action | operation part 6b has the piston part and 2nd rod part 6d similar to the said piston part and said 1st rod part 4d of the 1st action | operation part 4b.

  The mast raising / lowering adapter 8 is disposed in the vicinity of the base end portion 112d of the first mast main body 112a of the mast 112 in the lying posture. The mast raising / lowering adapter 8 is driven by the first rod part 4d of the first operating part 4b that advances from the first cylinder body 4a, and the proximal end part 112d of the first mast body 112a of the mast 112 in the lying posture. When the mast foot pins 114a and 114b are connected to the base end portions 112d and 112e of the mast main bodies 112a and 112b, the first mast main body 112a is moved to the first mast foot pin 114a. When the connection between the mast foot pins 114a and 114b and the base end portions 112d and 112e of the mast main bodies 112a and 112b is released (see FIG. 5), the base end of the first mast main body 112a is supported. This is used to move the portion 112d away from the turning frame 104 upward.

  Specifically, the mast raising / lowering adapter 8 includes an arm 22, an adapter main body 24, and a position holding portion 26 as shown in FIG. 7.

  The arm 22 rotates together with the adapter main body 24 when the base end portion of the mast 112 in the lying posture is separated upward from the revolving frame 104 and is a portion slightly closer to the front end portion from the base end portion 112d of the first mast main body 112a. Is pushed up from below. The arm 22 is supported so as to be rotatable about an axis extending in the width direction of the revolving frame 104 at an end of the arm main body 22a supported by an arm support portion 24c described later of the adapter main body 24. The arm 22 includes a roller 22b that contacts the lower surface of the first mast main body 112a when the first mast main body 112a is supported from below.

  The arm body 22a includes an inner plate 22c and an outer plate 22d (see FIG. 8). Of these two plate bodies 22c and 22d, the inner plate body 22c is disposed on the inner side in the width direction of the revolving frame 104, and the outer plate body 22d is separated to the outer side in the width direction of the revolving frame 104 with respect to the inner plate body 22c. Are arranged. The inner plate 22c is formed by bending an elongated flat plate in the thickness direction at two locations in the vicinity of the base end, and is arranged so as to be substantially parallel to the outer plate 22d. Has been. The outer plate body 22 d is formed in an elongated flat plate shape extending linearly, and is arranged so that the plate thickness direction substantially coincides with the width direction of the turning frame 104. The inner plate 22c and the outer plate 22d have a roller shaft hole 22g, a support position hole 22h (see FIG. 9), and a retreat position hole 22i (see FIG. 7). Are respectively provided so as to penetrate in the plate thickness direction. The roller shaft hole 22g is provided at the tip of both plate bodies 22c and 22d, and the roller shaft hole 22g of both the plate bodies 22c and 22d has a roller extending in the width direction of the swivel frame 104. The shaft 22j is inserted and fixed. Further, the support position hole portion 22h is provided at a position corresponding to each other at the base end portions of both plate bodies 22c and 22d. Further, the retracting position hole portions 22i are respectively provided at positions corresponding to each other, slightly closer to the base end portion from the roller shaft hole portion 22g, of both plate bodies 22c and 22d.

  The roller 22b is disposed between the tip portions of both plate bodies 22c and 22d of the arm main body 22a, and is pivotally supported by the roller shaft 22j so as to be rotatable around the axis. When the arm 22 pushes up the base end 112d side of the first mast main body 112a in the lying posture, the roller 22b abuts on the lower surface of the first mast main body 112a in the lying posture, and the first mast main body 112a. Along the base end 112d.

  The adapter main body 24 is rotatable about an axis extending in the width direction (left-right direction) of the swivel frame 104 to the mast support portion 104d to which the base end portion 112d of the first mast main body 112a is attached among the front portions of the swivel frame 104. It is attached to become. Specifically, the adapter body 24 can be rotated around the axis of the bushes 104i by two bushes 104i provided on the mast support portion 104d to which the base end portion 112d of the first mast body 112a is attached. It is supported to become. The adapter body 24 is connected to the distal end portion of the first rod portion 4d of the first actuating portion 4b at a portion located rearward of the attachment portion of the adapter body 24 with respect to the turning frame 104. As the first operating portion 4b moves forward and backward with respect to the cylinder body 4a, the two bushes 104i are pivoted up and down. Specifically, when the mast 112 is in the backward lying posture and the first hoisting cylinder 4 is in the contracted state, the adapter main body 24 is disposed at the reference position shown in FIG. 11 and the mast 112 in the lying posture. Is lifted up from the reference position by the first hoisting cylinder 4 when the mast foot pins 114a and 114b are used as fulcrums or when the base end portion of the mast 112 in the lying posture is moved upward from the turning frame 104. The As shown in FIG. 7, the adapter main body 24 includes a base portion 24a and a mast normal support portion 24b.

  The base portion 24 a is a portion that is attached to the bush 104 i of the mast support portion 104 d of the turning frame 104. The base portion 24 a includes an arm support portion 24 c for supporting the arm 22 and a connection portion 24 d connected to the distal end portion of the first rod portion 4 d of the first hoisting cylinder 4.

  The base portion 24a includes two substantially flat base side plates 24e extending in the front-rear direction and the vertical direction of the revolving frame 104, an end connecting portion 24f and an intermediate connecting portion 24g that connect the two base side plates 24e to each other. The arm support portion 24c is formed by the two base side plates 24e and the connecting portions 24f and 24g. Specifically, the two base side plates 24e are separated from each other in the width direction of the turning frame 104 and are arranged in parallel to each other. The end connecting portion 24f is formed in a flat plate shape, and connects the ends that are the lower ends of the two base side plates 24e in the adapter main body 24 at the reference position. The intermediate portion connecting portion 24g is formed in a flat plate shape, and connects the portions located at a predetermined intermediate position in the vertical direction among the two base side plates 24e in the adapter main body 24 at the reference position. The intermediate portion connecting portion 24g is arranged to be parallel to the end portion connecting portion 24f. A space surrounded by the two base side plates 24e and the connecting portions 24f and 24g is formed. This space is a space into which the arm main body 22a is inserted. When the adapter main body 24 is at the reference position, the space extends along the front-rear direction of the swivel frame 104, and the cross section perpendicular to the longitudinal direction is rectangular. Is formed. That is, the arm supporting portion 24c is formed by the portion surrounding the space of the two base side plates 24e and the connecting portions 24f and 24g.

  The arm support portion 24c is configured so that the roller 22b at the distal end of the arm 22 supports the first mast main body 112a from below when the base end portion of the mast 112 in the lying posture is separated upward from the turning frame 104. The arm 22 is displaced relative to the adapter body 24 (arm support portion 24c) between the support position where the arm 22 is disposed and the retracted position where the arm 22 is not supported by the first mast body 112a. The arm 22 is supported so that it becomes possible.

  Specifically, the arm support portion 24c is configured such that the arm 22 can be displaced with respect to the adapter main body 24 along the longitudinal direction in a state where the arm main body 22a is inserted into the space inside the arm support portion 24c. Support. The support position of the arm 22 is the position shown in FIGS. In this support position, only the base end portion of the arm 22 is disposed in the arm support portion 24c, and a portion on the front end side of the base end portion protrudes from the arm support portion 24c. The retracted position of the arm 22 is the position shown in FIGS. This retracted position is a position where the arm 22 is displaced from the support position to the adapter main body 24 along the longitudinal direction thereof. At this retracted position, only the distal end portion of the arm 22 protrudes rearward from the arm support portion 24c. .

  The base side plate 24e penetrates the base side plate 24e in the plate thickness direction (the width direction of the swivel frame 104) in a portion of the base side plate 24e of the base portion 24a that is positioned on the front side and the upper side in a state where the adapter body 24 is in the reference position. Mounting holes 24h (see FIG. 9) are respectively provided. Of the two base side evenings 24e of the base 24a, the portions provided with the mounting holes 24h are the mast support portions 104d with the base end portion 112d of the first mast main body 112a being attached to the mast support portions 104d. The two mast support plate plates 104g are arranged separately on both sides of the base end portion 112d of the first mast main body 112a. In the mounting hole 24h, a portion of the bush 104i having a cylindrical outer peripheral surface protruding from the mast support portion plate body 104g to which the bush 104i is mounted is inserted. Thereby, each base side plate 24e can be rotated around the axis of the bush 104i extending in the width direction of the swing frame 104 (left and right direction of the swing frame 104) with respect to the bush 104i to which the base side plate 24e is attached. Further, two support portion fixing holes 24i are respectively provided in portions of the base side plates 24e located between the mounting holes 24h and the arm support portions 24c.

  Further, the connecting portion 24d is located on the opposite side of the mounting hole 24h in the longitudinal direction of the arm support portion 24c from the end portion of each base side plate 24e located on the distal end side of the arm 22, that is, the rear end portion of each base side plate 24e. It consists of the extended part 24j extended. Each extension portion 24j is formed with a connection hole 24k that penetrates the extension portion 24j in the width direction of the turning frame 104. The distal end portion of the first rod portion 4d is inserted between the extended portions 24j of the two base side plates 24e, and a not-illustrated hole portion formed in the distal end portion of the first rod portion 4d and each extended portion 24j. The first rod portion 4d and the connection portion 24d are connected by inserting the connection pin 24p into the formed connection hole 24k. With this configuration, the first rod portion 4d and the base portion 24a are relatively rotatable about the connection pin 24p.

  The mast normal support portion 24b pushes up a portion closer to the distal end from the base end portion 112d of the first mast main body 112a from below when the mast 112 in the lying posture is raised with the mast foot pins 114a and 114b as fulcrums. is there. The mast normal support portion 24b is disposed above the arm support portion 24c and the arm 22 in a state where the adapter main body 24 is in the reference position. The mast normal support portion 24b is fixed to the base portion 24a in a state of being inserted between portions of the two base side plates 24e of the base portion 24a located on the mounting hole 24h side with respect to the arm support portion 24c. Yes.

  Specifically, the mast normal support portion 24b includes two support portion side plates 24q and a contact portion 24r. One support side plate 24q of the two support side plates 24q is one base side plate 24e between the portions of the two base side plates 24e located on the mounting hole 24h side with respect to the arm support portion 24c. And the other support portion side plate 24q is located on the mounting hole 24h side with respect to the arm support portion 24c of the two base side plates 24e. Between the parts, it is adjacent to the other base side plate 24e and arranged along the base side plate 24e. Each support part side plate 24q is formed in the same shape as seen from the width direction of the turning frame 104. A through hole (not shown) is formed at a position corresponding to the mounting hole 24h of the base side plate 24e in each of the support side plates 24q, and at a position corresponding to the two support portion fixing holes 24i of the base side plate 24e. Two fixing holes (not shown) are formed. A fixing pin 24s is inserted into the fixing hole of the supporting part side plate 24q corresponding to the supporting part fixing hole 24i of each base side plate 24e, whereby the mast normal supporting part 24b is fixed to the base part 24a. . Further, in the fixed state, a bush 104i to be inserted into the mounting hole 24h of the base side plate 24e is inserted into the through hole of the support side plate 24q, and the mast normal support portion 24b has the base 24a with the bush 104i as an axis. And can be rotated integrally.

  Each support portion side plate 24q has a protruding portion 24t protruding from the base side plate 24e to the rear side (the distal end side of the arm 22), and the protruding portions 24t are connected to each other by a contact portion 24r. The abutting portion 24r connects portions that are the upper ends of the protruding portions 24t in a state where the adapter main body 24 is in the reference position. The abutting portion 24r is a portion that pushes up the first mast body 112a by abutting against the lower surface of the first mast body 112a when the mast 112 in the lying posture is raised with the mast foot pins 114a and 114b as fulcrums.

  The position holding unit 26 holds the arm 22 at the support position so as to prevent the arm 22 from being displaced toward the retracted position when the arm 22 is disposed at the support position, and when the arm 22 is disposed at the retracted position. This is to hold the arm 22 in the retracted position so as to prevent displacement to the support position side.

  Specifically, the position holding portion 26 includes a holding hole 26a formed in an end portion located on the distal end side of the arm 22 in a portion constituting the arm support portion 24c of each base side plate 24e, a holding pin 26b, It is constituted by. When the arm 22 is disposed at the support position, the support position hole 22h provided at the base end of the arm body 22a is disposed so as to overlap the holding hole 26a, and the holding pin 26b is disposed at the support position hole 22h. The arm 22 is held so as not to be displaced toward the retracted position by being inserted into the holding hole 26a. Further, when the arm 22 is disposed at the retracted position, the retracted position hole 22i provided near the tip of the arm body 22a is disposed so as to overlap the retaining hole 26a, and the retaining pin 26b is disposed at the retracted position. The arm 22 is held so as not to be displaced toward the support position by being inserted into the hole 22i and the holding hole 26a.

  The mast hoisting sub-adapter 10 (see FIG. 2) is a second actuating part 6b that advances from the second cylinder body 6a when the mast 112 in the lying posture is raised with the mast foot pins 114a and 114b as fulcrums. The second mast main body 112b is driven by the rod portion 6d to push up a portion of the second mast main body 112b located on the rear side (front end side) of the base end portion 112e from below. Specifically, the mast raising and lowering sub-adapter 10 is advanced from the second cylinder body 6a when the mast foot pins 114a and 114b are coupled to the base end portions 112d and 112e of the mast bodies 112a and 112b. 2 is driven by the actuating portion 6b and rotates around the same axis as the mast raising / lowering adapter 8, and the second mast main body 112b in the lying posture is pushed up a portion located behind the base end portion 112e to The two-mast body 112b is raised with the mast foot pin 114b as a fulcrum. The mast raising / lowering sub-adapter 10 has a structure in which a connecting portion to the tip of the second rod portion 6d is provided on a member having the same structure as the mast normal support portion 24b of the mast raising / lowering adapter 8. . The mast hoisting sub-adapter 10 is configured such that when the mast hoisting adapter 8 pushes up the first mast main body 112a to move the base end of the mast 112 away from the swivel frame 104, the base end of the second mast main body 112b. It remains in a position where a gap is formed in the vertical direction between the portion 112e.

  The cylinder control device 12 controls the expansion and contraction operations of the first hoisting cylinder 4 and the second hoisting cylinder 6 by controlling the supply and discharge of pressure oil to and from the first cylinder main body 4a and the second cylinder main body 6a. When the mast 112 in the lying posture is caused to stand with the mast foot pins 114a and 114b as fulcrums, the cylinder control device 12 advances both the operating parts 4b and 6b from the cylinder main bodies 4a and 6a in the same manner. As a result, the mast hoisting adapter 8 and the mast hoisting sub-adapter 10 are similarly turned upward, and both the mast main bodies 112a and 112b are similarly turned upward with the mast foot pins 114a and 114b as fulcrums as masts 112. Stand up. On the other hand, when the base end portion of the mast 112 is moved away from the revolving frame 104, the cylinder control device 12 does not advance the second operating portion 6b from the second cylinder body 6a, but only the first operating portion 4b. Advance from the cylinder body 4a. Thereby, only the mast raising / lowering adapter 8 is rotated upward, and the mast raising / lowering adapter 8 pushes up the base end 112d side of the first mast main body 112a. Since the first mast main body 112a and the second mast main body 112b are connected to each other by the tip connecting portion 112c, the second mast main body 112b is similarly pushed up as the first mast main body 112a is pushed up by the mast raising / lowering adapter 8. Accordingly, the base end portions 112d and 112e of the mast main bodies 112a and 112b are separated from the turning frame 104 upward.

  Next, a description will be given of a crane winch removal method using the mast hoisting adapter 8 according to the first embodiment.

  In a state before starting the work, as shown in FIG. 4, the mast 112 is in a posture of lying down with the mast foot pins 114a and 114b as fulcrums. Further, as shown in FIG. 11, the first hoisting cylinder 4 is in a contracted state, and the mast hoisting adapter 8 is in the reference position. Similarly, the second hoisting cylinder 6 is in a contracted state, and the mast hoisting sub-adapter 10 is in the same reference position as the mast hoisting adapter 8.

  From this state, first, the mast foot pins 114a and 114b are removed to release the connection between the mast foot pins 114a and 114b and the base end portions 112d and 112e of the mast main bodies 112a and 112b (coupling release step).

  Thereafter, the predetermined connecting portions on the distal end side of the mast main bodies 112a and 112b are connected to the rear portions of the corresponding side wall portions 104b of the turning frame 104 by the corresponding connecting members 112i. This is a process for suppressing the lifting of the front end side of the mast 112.

  Next, the holding pin 26b that fixes the arm 22 of the mast raising / lowering adapter 8 to the adapter main body 24 at the retracted position is removed, and the arm 22 is displaced from the retracted position to the support position with respect to the adapter main body 24 (arm displacement step). ). Then, the holding pin 26b is inserted into the holding position hole 22h provided in the arm 22 and the holding hole 26a provided in the adapter body 24, thereby fixing the arm 22 at the supporting position.

  Next, the cylinder control device 12 advances the first operating part 4b of the first hoisting cylinder 4 from the first cylinder body 4a. As a result, the arm 22 of the mast raising / lowering adapter 8 rotates together with the adapter main body 24 about the bush 104i as an axis, and as shown in FIG. 12, the roller 22b at the tip of the arm 22 is in the lying posture. The base end portion 112d side of the main body 112a is pushed up from below to separate the base end portion of the mast 112 upward from the revolving frame 104 (separation step). At this time, the roller 22b is brought into contact with the lower surface of the first mast main body 112a along the longitudinal direction of the first mast main body 112a as the arm 22 pushes up the base end 112d side of the first mast main body 112a. Rolls toward the base end 112d side. Then, the roller 22b comes into contact with the stopper 112h, and further displacement toward the base end 112d is stopped. That is, the mast hoisting device 2 pushes up the base end 112d side of the first mast main body 112a until the roller 22b at the tip of the arm 22 contacts the stopper 112h. After the roller 22b comes into contact with the stopper 112h, the cylinder control device 12 stops the advancement of the first operating part 4b from the first cylinder body 4a, and holds the first undulating cylinder 4 in this state. In this separation step, the cylinder control device 12 does not advance the second operating portion 6b of the second hoisting cylinder 6 from the second cylinder body 6a. Therefore, the mast hoisting sub-adapter 10 does not rotate, and a gap is formed between the base end portion 112e of the second mast main body 112b that moves upward together with the first mast main body 112a and the mast hoisting sub-adapter 10. The

  Thereafter, the connection between the winch 116, 118, 120 and the swing frame 104 by the connecting member is released, and the winch 116, 118, 120 is moved between the base end portion of the mast 112 and the upper surface of the swing frame 104 by the separation process. It removes from the turning frame 104 through the formed gap (see FIG. 5) (winch removing step).

  As described above, in the first embodiment, the arm 22 is positioned between the support position and the retracted position where the tip of the arm 22 is disposed ahead of the position of the tip of the arm 22 at the support position. Since it is possible to displace, it is possible to easily remove the winches 116, 118, 120 on the swivel frame 104 and to greatly reduce the installation space for other equipment on the swivel frame 104 and to them. It is possible to simultaneously prevent a significant increase in the restrictions on the layout of the equipment. Specifically, when the winch 116, 118, 120 is removed from the turning frame 104, the amount of protrusion of the arm 22 from the adapter body 24 can be increased by displacing the arm 22 from the retracted position to the supporting position. Therefore, with the rotation of the adapter main body 24, the arm 22 pushes up the base end portion of the mast 112 to form a large gap between the base end portion of the mast 112 and the upper surface of the swivel frame 104. As a result, it is possible to easily remove the winches 116, 118, and 120 through a large gap formed between the base end portion of the mast 112 and the upper surface of the swivel frame 104. On the other hand, when the mast 112 is held in the lying posture and the first operating part 4b of the first hoisting cylinder 4 is retracted to the first cylinder body 4a side to hold the adapter body 24 at the reference position, the arm 22 If it is arranged at the retracted position, the rearward projection amount of the arm 22 can be suppressed. As a result, it is not necessary to secure a large space on the revolving frame 104 in order to avoid interference between the arm 22 and other equipment on the revolving frame 104, and the installation space for other equipment on the revolving frame 104 is greatly increased. Reduction and a significant increase in the layout constraints of those equipments can be prevented.

  Further, in the first embodiment, when the arm 22 rotates together with the adapter main body 24 and pushes the base end portion of the mast 112 away from the revolving frame 104 upward, the roller 22b at the distal end of the arm 22 is Since it rolls along the lower surface of the first mast main body 112a while being in contact with the lower surface of the first mast main body 112a, the lower surface of the first mast main body 112a and the tip of the arm 22 can be prevented from being damaged, and the mast 112 can be made smooth. Can be pushed up.

  In the first embodiment, when the mast 112 is raised with the mast foot pins 114a and 114b as fulcrums, the first mast main body 112a and the second mast main body 112b are connected by the mast hoisting adapter 8 and the mast hoisting subadapter 10. Since both are pushed up from below, the mast 112 can be raised with the mast foot pins 114a and 114b as fulcrums while holding the mast 112 in a stable state in the width direction of the revolving frame 104. On the other hand, when the mast raising / lowering adapter 8 pushes up the first mast main body 112a to separate the base end portion of the mast 112 in the inverted posture upward from the turning frame 104, together with the base end portion 112d of the first mast main body 112a. Since a gap is formed in the vertical direction between the base end portion 112e of the second mast main body 112b moving upward and the mast raising / lowering sub-adapter 10, the winches 116, 118, 120 are removed when the winches 116, 118, 120 are removed. The motors 116b, 118b, 120b projecting to the second mast main body 112b side of 120 are placed on the outer side of the revolving frame 104 through a gap formed between the base end portion 112e of the second mast main body 112b and the mast raising / lowering sub-adapter 10. Can escape. Therefore, according to the first embodiment, the winches 116, 118, 120 are placed on the revolving frame 104 while avoiding interference between the motors 116 b, 118 b, 120 b of the winches 116, 118, 120 and the mast raising / lowering sub-adapter 10. Can be easily detached from the outside.

  Further, in the first embodiment, when the base end portion of the mast 112 is moved away from the revolving frame 104, it is not necessary to rotate the mast raising / lowering sub-adapter 10, and the cylinder control device 12 is provided with the second raising / lowering cylinder 6. In order to advance only the first operating part 4b of the first hoisting cylinder 4 from the first cylinder body 4a without moving the second operating part 6b from the second cylinder main body 6a, the first hoisting cylinder 4 and the second hoisting cylinder The power can be reduced as compared with the case where both of the first actuating part 4b and the second actuating part 6b are advanced by driving both 6.

(Second Embodiment)
Next, with reference to FIGS. 13-20, the mast raising / lowering apparatus 2 and the mast raising / lowering adapter 8 by 2nd Embodiment of this invention are demonstrated.

  In the second embodiment, the arm 22 of the mast raising / lowering adapter 8 is supported by the arm support portion 24c so as to be rotatable about an axis extending in the width direction of the swivel frame 104. By rotating around, it is displaced between the support position and the retracted position. In the second embodiment, the adapter body 24 of the mast raising / lowering adapter 8 does not have the double structure of the base 24a and the mast normal support 24b as in the first embodiment, and the base 24a and the mast Usually, the support portion 24b is formed as an integral unit.

  Specifically, in the second embodiment, the base portion 24a includes two base side plates 24e that are spaced apart from each other in the width direction of the swivel frame 104 and arranged in parallel with each other, and the mast normal support portion 24b is an adapter. As shown in FIG. 17, the two support part side plates 24 q extending rearward from the two base side plates 24 e and the leading end parts of the support part side plates 24 q are connected in a state where the main body 24 is at the reference position. The contact portion 24r.

  Moreover, the connection part 24d connected with the front-end | tip part of the 1st rod part 4d among the adapter main bodies 24 is provided in the base end part of the said 2 support part side plate 24q. The connection portion 24d includes a connection hole 24k and a connection pin 24p that is inserted into and connected to the distal end portion of the first rod portion 4d. The connection structure of the connection portion 24d with the first rod portion 4d is as described above. It is the same as the connection structure with the 1st rod part 4d of the connection part 24d of 1st Embodiment.

  Further, the arm support portion 24 c for supporting the arm 22 is provided in an intermediate portion in the longitudinal direction of the two support portion side plates 24 q in the adapter main body 24. The arm support portion 24c has an arm support pin 24v provided between the two support portion side plates 24q so as to extend in the width direction of the turning frame 104. Specifically, a pin hole 24w that penetrates the intermediate portion in the width direction of the turning frame 104 is formed in an intermediate portion between the two support portion side plates 24q, and the arm support pin 24v rotates in the pin hole 24w. The frame 104 is inserted in a posture extending in the width direction. A pin insertion hole (not shown) is formed in the base end portions of the inner plate body 22c and the outer plate body 22d constituting the arm main body 22a, and the base end portions of the arm main body 22a serve as the two support portion side plates 24q. The arm support pin 24v is inserted into the pin insertion hole in a state of being disposed therebetween. That is, the arm 22 is pivotally supported by the arm support pin 24v so as to be rotatable about its axis. Thus, the arm 22 is supported by the arm support portion 24c so as to be rotatable between the support position shown in FIG. 13 and the retracted position shown in FIG.

  In the second embodiment, support position holding holes 26c are provided at the tip portions of the two support portion side plates 24q. Each of the support side plates 24q is provided with a projecting portion 24y so as to project from the tip portion to the position where the pin hole 24w is provided, on the opposite side of the contact portion 24r. A retracted position holding hole 26d is provided in the projecting portion 24y. In the second embodiment, the position holding portion 26 for holding the position of the arm 22 with respect to the adapter main body 24 includes the support position holding hole 26c, the retracted position holding hole 26d, and a holding pin 26b. Yes.

  Specifically, the support position holding hole 26c when the arm 22 is disposed at the support position at a position slightly closer to the tip than the base end portions of the inner plate body 22c and the outer plate body 22d constituting the arm body 22a. Are held at positions that coincide with the retracted position retaining holes 26c when the arm 22 is disposed at the retracted position. When the arm 22 is arranged at the support position, the arm 22 is retracted from the adapter body 24 by inserting the holding pin 26b into the held hole of the arm 22 and the support position holding hole 26c of the adapter body 24. It is held so as not to turn to the side. On the other hand, when the arm 22 is disposed at the retracted position, the arm 22 is attached to the adapter body 24 by inserting the retaining pin 26b into the retained hole of the arm 22 and the retracted position retaining hole 26d of the adapter body 24. It is held so as not to rotate to the support position side.

  The other configurations of the mast hoisting adapter 8 according to the second embodiment and the mast hoisting device 2 having the same are the same as those of the mast hoisting adapter 8 and the mast hoisting device 2 according to the first embodiment.

  Next, a crane winch removal method using the mast hoisting adapter 8 according to the second embodiment and the mast hoisting device 2 having the same will be described.

  In the second embodiment, as shown in FIG. 17, the mast foot pins 114a and 114b are mounted in a state where the mast 112 is in the lying posture, the arm 22 is in the retracted position, and the mast raising and lowering adapter 8 is in the reference position. Unplug. Thereafter, the cylinder controller 12 advances the first operating portion 4b of the first hoisting cylinder 4 from the first cylinder body 4a, and rotates the mast hoisting adapter 8 upward to a predetermined angle as shown in FIG.

  Next, the holding pin 26b is removed from the retracted position retaining hole 26d and the retained hole, and the arm 22 in the retracted position is rotated to the support position. Thereby, as shown in FIG. 19, the roller 22b at the tip of the arm 22 contacts the lower surface of the first mast body 112a. Then, the holding pin 26b is inserted into the support position holding hole 26c and the held hole, and the arm 22 is fixed to the adapter body 24 at the support position.

  Thereafter, the cylinder control device 12 further advances the first operating part 4b of the first hoisting cylinder 4 from the first cylinder body 4a, and rotates the arm 22 together with the adapter body 24 upward. Accordingly, as shown in FIG. 20, the roller 22b at the distal end of the arm 22 pushes up the proximal end 112d side of the first mast main body 112a in the lying posture from below, and the proximal end of the mast 112 is removed from the turning frame 104. Move away upward.

  Thereafter, in the same manner as in the first embodiment, each winch 116, 118, 120 is removed from the swivel frame 104 through a gap formed between the base end portion of the mast 112 and the swivel frame 104.

  The other configuration of the winch removing method according to the second embodiment is the same as that of the winch removing method according to the first embodiment.

  In the second embodiment, since the arm 22 protrudes rearward from the mast normal support portion 24b by disposing the arm 22 in the support position, when the winches 116, 118, 120 are removed from the revolving frame 104, Along with the rotation of the adapter main body 24, the arm 22 allows the base end of the mast 112 to be largely separated upward from the revolving frame 104 to form a large gap between the base end of the mast 112 and the revolving frame 104. . On the other hand, by rotating the arm 22 from the support position to the retracted position with the mast raising / lowering adapter 8 positioned at the reference position, the tip of the arm 22 is positioned at a more forward position than when the arm 22 is at the support position. Therefore, in order to avoid interference between the arm 22 and other equipment on the swivel frame 104, the installation space of the equipment is greatly reduced and the layout of the equipment is greatly increased. Can be prevented. Therefore, in the second embodiment, it is possible to easily remove the winches 116, 118, 120 mounted on the revolving frame 104, and to greatly reduce the installation space for the equipment on the revolving frame 104. It is possible to obtain the same effect as that of the first embodiment in which it is possible to prevent a significant increase in restrictions on the layout of the equipment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, the structure of the arm support portion 24c is not limited to the above structure. The arm support portion 24c is configured such that the arm is an adapter between a support position in which the arm protrudes rearward from the mast normal support portion and a retreat position in which the tip of the arm is disposed forward than when the arm is in the support position. Any structure may be used as long as the arm is supported so as to be relatively displaceable with respect to the main body.

  Further, the cylinder control device 12 may advance both the operation parts 4b and 6b of the hoisting cylinders 4 and 6 from the cylinder main bodies 4a and 6a when the base end part of the mast 112 is separated from the turning frame 104 upward. .

2 Mast hoisting device 4 First hoisting cylinder (raising cylinder)
4a 1st cylinder body (cylinder body)
4b 1st operation part (operation part)
6 Second hoisting cylinder 6a Second cylinder main body 6b Second operating portion 8 Mast hoisting adapter 10 Mast hoisting sub-adapter 12 Cylinder controller 22 Arm 22a Arm main body 22b Roller 24 Adapter main body 24b Mast normal support portion 24c Arm support portion 102 Lower traveling body (lower body)
104 Rotating frame 112 Mast 112a First mast main body 112b Second mast main body 112d, 112e Base end portion 114a First mast foot pin (support shaft)
114b 2nd mast foot pin (support shaft)
116 Main Wind Winch (Winch)
118 Supplementary Winch (Winch)
120 Boom hoisting winch (winch)

Claims (7)

A lower body, a swivel frame that is pivotably mounted on the lower body, a mast extending in a specific direction, a front part of the swivel frame, and detachably coupled to a base end of the mast; A support shaft for supporting the base end of the mast so that the base end of the mast can rotate about a horizontal axis extending in a width direction orthogonal to the front-rear direction of the swivel frame in the coupled state; and the mast supports the support A winch mounted on a portion of the swivel frame located below the mast in a lying posture that extends to the rear of the swivel frame with a shaft as a fulcrum, and attached to a front portion of the swivel frame A cylinder body and an undulating cylinder that has an operating part that advances and retreats with respect to the cylinder body along the axial direction of the cylinder body, and that expands and contracts by the advance and retreat of the operating part. The mast used in the lane and driven by the actuating portion that advances from the cylinder main body and pushes up a portion positioned behind the base end portion of the mast in the lying posture, and the support shaft is a base of the mast. The mast stands up with the support shaft as a fulcrum when it is connected to the end portion, while the base end portion of the mast when the connection between the support shaft and the base end portion of the mast is released A mast raising and lowering adapter for separating the upper part from the revolving frame,
It is attached to the front part of the swivel frame so as to be rotatable around an axis extending in the width direction of the swivel frame, and is connected to the actuating part at a part located behind the attaching part. An adapter body that rotates up and down according to the advance and retreat of the
An arm that pivots together with the adapter body to push up the mast from below when the base end of the mast in the lying posture is separated upward from the swivel frame;
The adapter body includes a mast normal support portion that rotates together with the adapter body to push up the mast from below when the mast in the lying posture is raised with the support shaft as a fulcrum, and the arm lowers the mast. An arm support portion for supporting the arm so as to be displaceable relative to the adapter main body between a support position arranged when the mast is pushed up and a retracted position arranged when the mast is not pushed up. Have
When the arm is in the support position, the arm is located behind the mast normal support portion when the adapter body is disposed at a specific rotation position so that the mast normal support portion extends rearward. When the arm is in the retracted position, the tip of the arm is located at the end of the arm when the adapter body is disposed at the specific rotation position with the arm in the support position. Mast undulation adapter that is placed in front of the tip. The arm support portion supports the arm so that the arm can be displaced with respect to the adapter main body along the longitudinal direction thereof,
The mast raising / lowering adapter according to claim 1, wherein the retracted position of the arm is a specific position where the arm is retracted from the support position along the longitudinal direction toward the adapter main body. The arm support portion supports the arm so that the arm is rotatable with respect to the adapter body about an arm rotation axis extending in the width direction of the swivel frame.
2. The mast undulation according to claim 1, wherein the retracted position of the arm is a specific position in which the arm is rotated about the arm rotation axis so that the tip of the arm is displaced downward from the support position. Adapter.   The arm extends in the longitudinal direction of the arm, and is supported so as to be rotatable about an axis extending in the width direction of the swivel frame at an end of the arm body supported by the arm support portion. The mast raising / lowering adapter according to any one of claims 1 to 3, further comprising a roller that comes into contact with a lower surface of the mast when the arm supports the mast from below. A lower body, a swivel frame that is pivotably mounted on the lower body, and arranged side by side in a width direction that extends in a specific direction and is orthogonal to the front-rear direction of the swivel frame, and is connected to be integrated with each other A mast having a first mast main body and a second mast main body, and a front end of the swivel frame, which are detachably coupled to the base end portions of the both mast main bodies, and the base ends of the mast main bodies in the coupled state A support shaft for supporting the base end portions so that the portion can rotate about a horizontal axis extending in the width direction of the swivel frame, and the mast extending to the rear of the swivel frame with the support shaft as a fulcrum. In a lying down posture, the swing frame is used in a crane equipped with a winch mounted on a portion located below the mast, and the support shafts are When the mast in the lying posture is raised with the support shaft as a fulcrum when in the coupled state with the base end of the main body, the connection between the support shaft and the base ends of the both mast bodies is released. A mast hoisting device for separating the base end of the mast upward from the swivel frame when
A first cylinder body mounted at a position corresponding to the first mast body in the front portion of the revolving frame, and a first operation that advances and retreats with respect to the first cylinder body along the axial direction of the first cylinder body. A first undulation cylinder that has a portion and expands and contracts by advancing and retreating the first operating portion;
A second cylinder body mounted at a position corresponding to the second mast body in the front portion of the revolving frame, and a second operation that advances and retreats with respect to the second cylinder body along the axial direction of the second cylinder body. A second undulation cylinder that has a portion and expands and contracts by advancing and retreating the second operating portion;
Any one of Claims 1-4 which pushes up the site | part located behind the base end part among the said 1st mast main body which is driven by the said 1st action | operation part advanced from the said 1st cylinder main body, and is in the said lying posture. Or the mast undulating adapter according to claim 1;
The mast hoisting adapter is attached to a position corresponding to a base end portion of the second mast main body of the front portion of the swivel frame so as to be rotatable about the same axis as the adapter main body, and the support shaft is When the two mast main bodies are coupled to the base end portions, the second main body is driven by the operating portion advanced from the second cylinder main body and is rotated to synchronize with the adapter main body, so that the second posture is in the lying posture. A portion of the mast body located behind the base end is pushed up to raise the second mast body with the support shaft as a fulcrum, and the mast raising / lowering adapter pushes up the first mast body to raise the mast. When the base end portion of the second mast body is separated upward from the revolving frame, a gap is formed in the vertical direction between the base end portion of the second mast body moving upward. And a sub-adapter mast undulations to stay the mast hoisting device.   When erecting the mast in the lying posture with the support shaft as a fulcrum, the first operating part is advanced from the first cylinder body, and the second operating part is advanced from the second cylinder body. A cylinder control device for moving only the first operating part from the first cylinder main body without moving the second operating part from the second cylinder main body when the base end of the first moving part is moved upward from the revolving frame. The mast hoisting device according to claim 5, further comprising: A winch removal method for removing the winch mounted on the swivel frame using the mast raising and lowering adapter according to any one of claims 1 to 4,
A coupling release step for releasing the coupling between the support shaft and the base end of the mast in the lying posture;
An arm displacement step of displacing the arm from the retracted position to the support position;
After the decoupling step and the arm displacing step, the operating portion of the hoisting cylinder is advanced from the cylinder body to rotate the arm together with the adapter main body, and the mast in the lying posture at the tip of the arm A separation step of pushing up from the bottom and separating the base end of the mast upward from the swivel frame;
A winch removing step of removing the winch mounted on the revolving frame from the revolving frame through a gap between the base end portion of the mast and the upper surface of the revolving frame after the separating step; How to remove.

Images