JP6579175B2 - Crane and crane weight guy line storage method, crane weight guy line transportation method - Google Patents

Description

  The present invention relates to a crane, a method for storing a crane weight guy line, and a method for transporting a crane weight guy line.

  Conventionally, a crane including a crane main body, a boom, and a mast is known. The boom is attached to the front part of the crane body so as to be able to undulate around a horizontal rotation axis. In addition, the mast is provided on the crane body so as to be able to undulate around a rotation axis parallel to the rotation axis of the boom at the rear of the boom, and functions as a support column for raising and lowering the boom. When the crane is used, the boom is inclined forward and the mast is inclined backward.

  The crane further includes a mast backstop. When the mast is positioned at a predetermined angle with respect to the crane body, the mast backstop prevents the mast from falling backwards.

  Patent Document 1 discloses a crane having a weight disposed behind the crane body. The weight is supported by a weight guy link (weight guy line) suspended from the tip of the mast. The balance of the crane under operation is maintained by arranging the weight on the side opposite to the boom in the front-rear direction.

JP 2017-7777 A

  When the crane as described above is disassembled, there is a problem that if the lower end portion of the weight guy link is removed from the weight, the weight guy link is swung by wind or the like, and therefore, the disassembly work tends to be disturbed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a crane and a crane weight guy line capable of stably housing a weight guy line suspended from the tip of the mast on the mast. The object is to provide a storage method and a transportation method.

  In the disassembling work of the crane, when the mast is rotated forward after the lower end portion of the weight guy line is removed from the weight, the lower end portion of the weight guy line moves so as to approach the mast. The inventor of the present invention has found that the weight guy line is stored in the mast by using the movement of the weight guy line. On the other hand, in order to reduce the width in the lateral direction of the crane, a weight guy line and a mast backstop may be arranged on the same plane orthogonal to the rotation axis of the mast or in the vicinity thereof. In this case, when the mast is rotated during the crane disassembly work as described above, the lower end portion of the weight guy line interferes (contacts) with the mast backstop. At this time, there is a problem that the weight guy line is difficult to be stored in the mast because the weight guy line is swayed in the lateral direction or its position is shifted.

  In order to solve the above-described new problem, a crane according to one aspect of the present invention includes a crane main body, a boom supported by the crane main body so as to be rotatable about a horizontal rotation axis, and the boom. A mast that is pivotally supported by the crane main body around a rotation axis parallel to the rotation axis of the boom at a rear side position and extends rearward and upward from the crane main body. And a pair of left and right mast backstops that prevent the mast from falling backward at a position rearward of the rotation axis of the mast. The mast backstop includes a pair of left and right mastback stops each having a mast side end connected to the mast and a body side end capable of contacting the crane body, and the mass A pair of left and right weight guy lines hanging from the tip of the mast so as to be respectively disposed on or near a pair of planes perpendicular to the rotation axis and passing through the pair of left and right mast backstops, A pair of left and right weight guy lines has a guy line upper end and a guy line lower end rotatably supported at the tip of the mast, respectively, and a pair of left and right weight guy lines and a lower end of the pair of left and right weight guy lines. A mast body rotatably supported by the crane body, and a rear side of the mast body above the mast side ends of the pair of left and right mast backstops. At least left that is arranged on the side and can hold the upper part of the pair of left and right weight guy lines A pair of mast-side holding portions and a mast-side holding portion are disposed so as to protrude rearward from the rear side surface of the mast main body above the mast-side end portion, and for the weight while restraining the pair of left and right weight guy lines in the left-right direction A pair of left and right mast side guide portions that guide the upper portion of the guy line to the mast side holding portion, and the pair of left and right mast backstops, respectively, a backstop body supported by the mast, A backstop side holding portion that is arranged on the rear side surface of the backstop body and can hold a lower portion of the weight guyline, and is arranged on the rear side surface of the backstop body and restrains the weight guyline in the left-right direction. While the lower part of the weight guy line is the backstop side holding part A backstop side guide portion that guides the lower end portion of the weight line, and the lower end portions of the pair of left and right weight lines are respectively detached from the weight and the pair of left and right portions. When the mast is rotated forward from the rearward tilted position with the main body side end of the mast backstop being detached from the crane main body, the lower end of the guy line of the pair of left and right weight guy lines Prior to the timing at which the portions reach the pair of left and right backstop side guide portions, the upper portion of the pair of left and right weights is such that the upper portion of the weight guideline is restrained by the mast side guide portion in the left and right direction, The mast side guide part protrudes from the mast body.

  According to this configuration, when the mast is rotated forward, the upper part of the weight guy line is restrained by the mast side guide part before the lower end part of the weight guy line reaches the mast backstop. For this reason, the shaking and position fluctuation in the left-right direction of the weight guy line are suppressed. As a result, the lower end of the guy line of the weight guy line can smoothly enter the backstop side guide part.

  In the above-described configuration, it is desirable that the at least one pair of left and right mast side guide portions include a plurality of left and right mast side guide portions that are spaced apart from each other along the longitudinal direction of the mast.

  According to this configuration, when the mast is rotated, the upper portion of the weight guy line can be stably guided, and the weight guy line can be prevented from shaking in the left-right direction and from changing in position.

  In the above configuration, the at least one pair of left and right mast side guide portions project from the mast main body and can guide the weight guy line, and a retracted posture arranged along the rear side surface of the mast main body. It is desirable that the posture can be changed between.

  According to this configuration, the occupied space on the transport vehicle can be reduced during transportation of the mast and the weight guy line.

  In the above configuration, the mast side guide portion is a pair of guide members that are spaced apart from each other in the left-right direction, and the weight guide line is allowed to be inserted between the pair of guide members. The mast side holding portion is configured by a base end portion of the pair of guide members, and the weight guide line fits between the pair of guide members, It is desirable that the mast side holding portion holds the weight guy line.

  According to this configuration, the guide function and the holding function of the weight guy line are realized with a simple configuration of the pair of guide members.

  In the above configuration, it is preferable that the mast side guide portion is disposed at a distance from the mast side holding portion in the longitudinal direction of the mast.

  According to this configuration, a structure suitable for the guide function and holding function of the weight guy line can be employed for each of the mast side guide part and the mast side holding part.

  In the above-described configuration, the weight guy line is a guy link, and the plurality of line parts and the plurality of line parts are rotatable with respect to each other about an axis extending in parallel with the rotation axis. It is desirable to have a plurality of link portions that connect the line portions.

  According to this structure, the shaking in the left-right direction of the weight guy line at the time of rotation of a mast is further suppressed.

  According to another aspect of the present invention, a crane weight storage method for a crane includes a crane body, a boom supported by the crane body so as to be rotatable about a horizontal rotation axis, and a rear side of the boom. And a mast that is pivotally supported by the crane body about a rotation axis parallel to the rotation axis of the boom at the position, and the mast falls backward at a position behind the rotation axis of the mast. A pair of left and right mastback stops for preventing the tip of the mast, and a front end of the mast so as to be disposed on or near a pair of planes orthogonal to the rotation axis of the mast and passing through the pair of left and right mastback stops A pair of left and right weight guy lines suspended from the left and right weights, and a weight connected to the lower ends of the left and right pair of weight guy lines. A method of retracting the I-line, wherein the mast is in a rearwardly inclined posture extending rearward and upward from the crane body, and removing the lower ends of the pair of left and right weights from the weights, The mast is rotated forward from the rearward tilted posture, and the upper portions of the pair of left and right weight guy lines are restrained in the left-right direction by a pair of left and right mast side guides provided on the mast, respectively, Further rotating forward, restraining the lower ends of the pair of left and right weight guy lines in the left and right directions by a pair of left and right backstop side guides provided on the pair of left and right mast backstops, and Rotate further forward and left on the left and right mastback stops By retaining the lower portion of the guy line for the pair of left and right weights by a pair of backstop holding portion, and a storing the weight for guy line to the mast and the mast backstop.

  According to this method, when the mast is rotated, the upper part of the weight guy line is first restrained by the mast side guide part, so that the shaking and position fluctuation in the left-right direction of the weight guy line are suppressed. As a result, the lower end of the guy line of the weight guy line can smoothly enter the backstop side guide part.

  In the above method, before the lower end portions of the left and right pair of weight guy lines are constrained by the pair of left and right backstop side guide portions, a plurality of gaps arranged in the longitudinal direction on the rear side surface of the mast are arranged. It is desirable that the mast side guide portion further includes restraining the upper portions of the pair of left and right weight guy lines in order.

  According to this method, when the mast is rotated, the upper portion of the weight guy line can be stably guided, and the weight guy line can be prevented from shaking in the left-right direction and position fluctuation.

  In the above method, a plurality of mast sides arranged at intervals in a longitudinal direction of the mast before lower portions of the pair of left and right weight guy lines are held by the pair of left and right backstop sides It is desirable to further comprise holding the upper portions of the pair of left and right weight guy lines in order by a holding portion.

  According to this method, when the mast is rotated, the upper portion of the weight guy line can be stably held, and the weight guy line can be prevented from shaking in the left-right direction and from changing in position.

  A crane weight guy line transportation method according to another aspect of the present invention is the crane weight guy line storage method according to any one of the above, the weight guy line is the mast and the mast backstop. In the state where the mast is further moved forward, the mast is laid down on the ground, and the weight and the weight guy line are stored in the mast. And transporting them together.

  According to this method, the space occupied on the transport vehicle can be reduced when the mast and the weight guy line are transported.

  In the above method, in the state where the weight guy line is stored in the mast, the mast and the weight guy line are divided into a plurality of areas along the longitudinal direction, and the mast in each area and the weight guy line It is desirable to further comprise transporting each of them together.

  According to this method, the mast and the weight guy line can be divided and transported as one body, and the necessity of preparing a transport vehicle or a plurality of vehicles having a large space for transporting separately is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the storing method of the weight guy line for cranes and the crane which can accommodate stably the guy line for weight suspended from the front-end | tip part of a mast in a mast, and the transportation method are provided.

It is a side view of the crane concerning one embodiment of the present invention. It is a side view which shows the mode of the disassembly work of the crane which concerns on one Embodiment of this invention. It is a side view which shows the mode of the disassembly work of the crane which concerns on one Embodiment of this invention. It is a side view which shows the mode of the disassembly work of the crane which concerns on one Embodiment of this invention. It is a rear view of the mast and weight guy line of a crane concerning one embodiment of the present invention. It is the perspective view which expanded the periphery of the guide part and holding | maintenance part of the mast of the crane which concerns on one Embodiment of this invention. It is the perspective view which expanded the periphery of the guide part and holding | maintenance part of the mast of the crane which concerns on one Embodiment of this invention. It is the perspective view which expanded the periphery of the guide part and holding | maintenance part of the mast of the crane which concerns on one Embodiment of this invention. It is a perspective view in the state where the mast backstop stood up to the mast in the crane concerning one embodiment of the present invention. It is a perspective view in the state where the mast backstop laid down with respect to the mast in the crane concerning one embodiment of the present invention. In the crane which concerns on one Embodiment of this invention, it is a side view which shows a mode that the guy line for weights is stored in a mast. In the crane which concerns on one Embodiment of this invention, it is a side view which shows a mode that the guy line for weights is stored in a mast. In the crane which concerns on one Embodiment of this invention, it is a side view which shows a mode that the guy line for weights is stored in a mast. In the crane which concerns on one Embodiment of this invention, it is a side view which shows a mode that the guy line for weights is stored in a mast. In the crane which concerns on one Embodiment of this invention, it is a side view which shows a mode that the guy line for weights was stored in the mast. It is a side view which shows a mode that the mast shown by FIG. 15 is removed from a crane main body. It is the side view to which a part of mast of FIG. 16 was expanded. In the crane which concerns on one Embodiment of this invention, the weight guy line is stored in a mast and it is a side view of the state which can be conveyed. It is the side view to which a part of mast back stop of FIG. 18 was expanded. FIG. 20 is a plan view of the mast backstop of FIG. 19. It is the side view to which the mast and weight guy line of the area | region A of FIG. 18 were expanded. It is a rear view of the mast and weight guy line of FIG. It is the side view which expanded a part of guide part and holding | maintenance part of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a crane 10 according to an embodiment of the present invention. In the following, in each drawing, directions of “up”, “down”, “front”, and “rear” are shown. The directions indicate the structure and the assembly method of the crane 10 according to the present embodiment. It is shown for the sake of explanation, and does not limit the moving direction or usage of the crane according to the present invention.

  The crane 10 includes a revolving body 11 corresponding to the crane body of the present invention, a traveling body 12 that supports the revolving body 11 in a turnable manner, a boom 13 as a hoisting member, and an HL mast 14 that is a boom hoisting member. And a box mast 15.

  The boom 13 shown in FIG. 1 is supported at the front portion of the revolving structure 12 so as to be rotatable in the undulation direction. The boom 13 includes a boom foot 13S. The boom foot 13 </ b> S serves as a fulcrum part for the rotation of the boom 13. The boom foot 13S forms a horizontal rotating shaft extending in the left-right direction (lateral direction).

  Further, the boom 13 includes a boom idler sheave 130 and idler sheaves 131 and 132. The boom idler sheave 130 is disposed on the rear side surface of the central portion of the boom 13 in the longitudinal direction. The idler sheaves 131 and 132 are rotatably supported at the tip of the boom 13.

  A pair of left and right boom back stops 28 are provided on the base end side of the boom 13. These boom back stops 28 come into contact with the revolving structure 11 when the boom 13 reaches the standing posture shown in FIG. By this contact, the boom 13 is restricted from being beaten rearward by a strong wind or the like.

  The HL mast 14 is rotatably supported by the revolving structure 11 around a rotation axis parallel to the rotation axis of the boom 13 at a position on the rear side of the boom 13. In other words, the HL mast 14 can also be rotated in the same direction as the direction in which the boom 13 is raised and lowered. The HL mast 14 includes an HL mast foot 14S. The HL mast foot 14 </ b> S serves as a fulcrum part in the rotation of the HL mast 14. The HL mast foot 14S forms a rotation axis extending in the left-right direction (lateral direction). As shown in FIG. 1, the HL mast 14 functions as a support column in the rotation of the boom 13 in a backward tilting posture that extends rearward and upward from the revolving structure 11 obliquely. In other embodiments, the mast of the present invention exemplified by the HL mast 14 may have other forms such as a box-type mast. The HL mast 14 also includes a mast idle sieve 140. The mast idle sheave 140 is disposed on the rear side surface of the central portion of the HL mast 14 in the longitudinal direction. In the present embodiment, the HL mast 14 can be divided into three members along the longitudinal direction as described later.

  A pair of left and right mast back stops 29 are provided on the base end side of the HL mast 14. These mast backstops 29 extend from the HL mast 14 in the rearward tilting posture (standing posture) shown in FIG. 1 at a position on the rear side of the rotation axis (HL mast foot 14S) of the HL mast 14 and the swing body. The HL mast 14 is prevented from falling backward due to a strong wind or the like.

  Each of the pair of left and right mast backstops 29 has a backstop upper end 290 (mast side end) and a backstop lower end 295 (main body side end). The backstop upper end 290 is connected to the HL mast 14 as shown in FIG. The backstop lower end portion 295 abuts on the receiving portion (not shown) disposed on the revolving unit 11. As described later, the mast backstop 29 is rotatably supported by the HL mast 14 with the backstop upper end 290 as a fulcrum. By rotating the mast backstop 29 about the backstop upper end 290, the mastback stop 29 can be changed in posture between the protruding posture (FIG. 9) and the retracted posture (FIG. 10).

  The box mast 15 is rotatably connected to the revolving structure 11 on the rear side (downward) of the HL mast 14. The box mast 15 has a rectangular shape in cross-sectional view. The rotational axis of the box mast 15 is arranged in parallel with the rotational axis of the boom 13 and at substantially the same position as the rotational axis of the HL mast 14. In other words, the box mast 15 can also be rotated in the same direction as the direction in which the boom 13 is raised and lowered. The box mast 15 includes a box mast foot 15S. The box mast foot 15 </ b> S serves as a fulcrum for the rotation of the box mast 15. The box mast foot 15S forms a rotation axis extending in the left-right direction (lateral direction).

  The crane 10 further includes a lower spreader 18, an upper spreader 19, a guy line 20, a boom hoisting rope 21, a boom hoisting winch 22, and a mast guy link 23.

  The lower spreader 18 is supported at the tip of the HL mast 14. The lower spreader 18 includes a lower sheave block (not shown), and a plurality of sheaves are arranged in the width direction (left-right direction).

  The upper spreader 19 is disposed in front of the lower spreader 18 at a predetermined interval. The upper spreader 19 is connected to the tip of the boom 13 through the guy line 20. The upper spreader 19 includes an upper sheave block (not shown), and a plurality of sheaves are arranged in the width direction (left-right direction).

  A pair of guy lines 20 are arranged in the left-right direction orthogonal to the paper surface of FIG. The rear end portion of the guy line 20 is connected to the upper spreader 19, and the front end portion of the guy line 20 is connected to the distal end portion of the boom 13. The guy line 20 includes guy links (metal plates), guy ropes, guy wires (metal wires), and the like.

  The boom hoisting rope 21 is pulled out from the boom hoisting winch 22 and hooked on a sheave (not shown) at the tip of the HL mast 14, and then the lower sheave block of the lower spreader 18 and the upper sheave block of the upper spreader 19. It is hung multiple times in between. Note that the tip portion of the boom hoisting rope 21 after being hung around the lower sheave block and the upper sheave block is fixed to the tip portion of the HL mast 14.

  The boom hoisting winch 22 is disposed on the base end side of the HL mast 14. The boom hoisting winch 22 changes the distance between the lower sheave block of the lower spreader 18 and the upper sheave block of the upper spreader 19 by winding and unwinding the boom hoisting rope 21 so that the boom 13 is moved to the HL mast. The boom 13 is raised and lowered while being rotated relative to 14.

  Further, the crane 10 includes a pair of left and right mast guy links 23, a mast hoisting rope 24, and a mast hoisting winch 25.

  The mast guy link 23 connects the tip of the HL mast 14 and the tip of the box mast 15. This connection links the rotation of the HL mast 14 with the rotation of the box mast 15.

  The mast hoisting rope 24 includes a sheave block 26 arranged on the revolving body 11 and a plurality of sheaves arranged in the width direction, and a sheave block arranged on the tip of the box mast 15 and a plurality of sheaves arranged in the width direction. 27 and multiple times.

  The mast hoisting winch 25 is disposed on the revolving structure 11. The mast hoisting winch 25 winds and unwinds the mast hoisting rope 24. By winding and unwinding the mast hoisting rope 24 by the mast hoisting winch 25, the distance between the sheave block 27 at the front end of the box mast 15 and the sheave block 26 at the rear end of the swivel body 11 is changed. While the box mast 15 and the HL mast 14 are integrally rotated with respect to the revolving structure 11, the HL mast 14 is raised and lowered. The rotation of the HL mast 14 and the box mast 15 is mainly performed when the crane 10 is assembled and disassembled. When the crane 10 is used, the positions (ground angles) of the HL mast 14 and the box mast 15 are substantially fixed.

  In addition to the above-described mast hoisting winch 25 and boom hoisting winch 22, a main winding winch 30 and an auxiliary winding winch 31 for lifting and lowering a suspended load are mounted on the crane 10. In the crane 10 according to the present embodiment, the main winding winch 30 and the auxiliary winding winch 31 are both installed on the revolving structure 11. The winches 30 and 31 of the crane 10 may be mounted on the base end portion of the boom 13. As shown in FIG. 1, a main winding idler 30 </ b> S and an auxiliary winding idler 31 </ b> S are disposed at the base end portion of the HL mast 14. The main winding idler 30S and the auxiliary winding idler 31S each include a rotatable sheave.

  The main winding winch 30 performs lifting and lowering of the suspended load by the main winding rope 32 (FIG. 1). With respect to this main winding, the above-described guide sheaves 131 and 132 are rotatably provided at the tip of the boom 13, and a plurality of main winding point sheaves are arranged in the width direction at positions adjacent to the guide sheave. A sheave block is provided. A main hook 34 for suspended loads is connected to the main winding rope 32 suspended from the main winding sheave block. Then, the main winding rope 32 drawn out from the main winding winch 30 is hung on the guide sheaves 131 and 132 in order, and the sheave of the main winding sheave block and the sheave of the sheave block provided on the main hook 34 It is passed over between. Therefore, when the main winding winch 30 winds up or unwinds the main winding rope 32, the main hook 34 is wound and lowered.

  Similarly, the auxiliary winding winch 31 performs lifting and lowering of the suspended load by the auxiliary winding rope 33. The auxiliary winding has a structure (not shown) similar to that of the main winding. When the auxiliary winding winch 31 winds or unwinds the auxiliary winding rope 33, the auxiliary hook for unillustrated suspension connected to the end of the auxiliary winding rope 33 is wound up or down. .

  The crane 10 includes a pair of left and right weight guy links 36, a pallet weight 37 (weight), and a counterweight 38 (see FIG. 11). The pallet weight 37 is disposed behind the revolving unit 11 in order to adjust the balance of the crane 10. The pallet weight 37 is configured by stacking plate-like weights (weights) vertically. The pallet weight 37 has a function of keeping the balance of the crane 10 as an SHL (Super Heavy Lifting) weight provided for the crane 10 to lift a heavy object. The pallet weight 37 is connected to the tip of the HL mast 14 by a pair of left and right pallet weight guy links 36 (weight guy lines). In other words, the pallet weight 37 is suspended from the tip of the HL mast 14 via the pair of pallet weight guy links 36.

  The pair of left and right weight guy links 36 are suspended from the tip of the HL mast 14 so as to be arranged on a pair of planes orthogonal to the rotation axis of the HL mast 14 and passing through the pair of left and right mast backstops 29, respectively. (FIG. 5). Each weight guy link 36 is provided with fulcrum part 36A (guy line upper end part) and lower end part 36B (guy line lower end part). The fulcrum part 36 </ b> A is rotatably supported by the tip part of the HL mast 14. The lower end portion 36B is connected to the pallet weight 37.

  Each weight guy link 36 includes a cylinder 361, a plurality of line portions 362, and a plurality of link portions 363. The cylinder 361 is disposed at the upper end of the weight guy link 36 and can be expanded and contracted by hydraulic pressure. The cylinder 361 is expanded and contracted to adjust the length of the weight guy link 36. The plurality of link portions 363 connect the plurality of line portions 362 to each other so that the plurality of line portions 362 can rotate around an axis extending in parallel with the rotation axis of the HL mast 14. For this reason, in the plane orthogonal to the rotation axis of the HL mast 14, the weight guy link 36 can be bent with each link portion 363 as a fulcrum (see FIG. 15).

  The counterweight 38 (see FIG. 11) is attached to the rear portion of the revolving structure 11 in order to balance the crane 10 like the pallet weight 37.

<Crane disassembly process>
Next, the disassembly process of the crane 10 according to the present embodiment will be described with reference to FIGS. 2 to 4 in addition to FIG. FIG. 2 thru | or FIG. 4 is a side view which respectively shows the mode of the disassembly work of the crane 10 which concerns on this embodiment.

  In the crane 10 shown in FIG. 1, when the cylinders 361 of the pair of left and right weight guy links 36 are extended, the pallet weight 37 is placed on the ground. Then, the lower end portions 36B of the pair of left and right weight guy links 36 are removed from the pallet weight 37, respectively. Thereafter, when the boom hoisting winch 22 extends the boom hoisting rope 21, the distance between the lower spreader 18 and the upper spreader 19 increases, and the crane 10 eventually becomes in the state shown in FIG. 2. That is, the boom 13 is rotated forward with respect to the revolving structure 11 and is in a state of lying on the ground. Next, when the mast hoisting winch 25 unwinds the mast hoisting rope 24 while the boom hoisting winch 22 winds the boom hoisting rope 21 from the state shown in FIG. 2, the sheave block 26, the sheave block 27, As the distance increases, the crane 10 eventually becomes in the state shown in FIG. At this time, the HL mast 14 shifts from a rearward tilting posture that extends rearward and upward from the revolving structure 11 to a forward tilting posture that extends forward and upward. As shown in FIG. 3, when the HL mast 14 is rotated forward, the back stop lower end portion 295 of the mast back stop 29 is detached from the revolving structure 11. Even in this case, the attitude (angle) of the mast backstop 29 with respect to the HL mast 14 is maintained.

  Furthermore, as shown in FIG. 3, the upper spreader 19 is directly connected to the center of the boom 13, so that the boom 13 can be lifted by the HL mast 14. Therefore, when a pin (not shown) fitted in the boom foot 13S is detached from the boom foot 13S, the boom 13 is lifted by the HL mast 14 and placed on the ground. As a result, the boom 13 is removed from the revolving structure 11.

  Thereafter, the mast hoisting winch 25 further feeds out the mast hoisting rope 24, whereby the HL mast 14 is laid down on the ground as shown in FIG. Thereafter, when the mast guy link 23 is cut off and a pin (not shown) fitted in the HL mast foot 14S is detached from the HL mast foot 14S, the HL mast 14 is lifted by the box mast 15 (see FIG. 16). ), Placed on the ground. As a result, the HL mast 14 is removed from the swing body 11. At this time, a pin (not shown) is detached while the HL mast 14 is suspended by the mast hanging sling 15H suspended from the tip of the box mast 15, and the HL mast 14 is placed on the ground. The mast hanging sling 15H includes an extendable cylinder.

  In the disassembling process of the crane 10 as described above, the HL mast 14 shifts from the backward leaning posture to the forward leaning posture in the state change shown in FIGS. At this time, since the lower end portions 36B of the pair of left and right weight guy links 36 are previously removed from the pallet weight 37, the weight guy links 36 are moved forward with the fulcrum part 36A as a fulcrum so as to follow the rotation of the HL mast 14. Move to. By using the movement of the weight guy link 36, the weight guy link 36 can be stored in the HL mast 14.

  On the other hand, as described above, in the present embodiment, the pair of left and right weight guy links 36 are respectively disposed on or near a pair of planes that are orthogonal to the rotation axis of the HL mast 14 and pass through the pair of left and right mast backstops 29. In this way, it is suspended from the tip of the HL mast 14. For this reason, when the lower end portion 36B of the weight guy link 36 first comes into contact with the mast backstop 29 as the HL mast 14 rotates, the weight guy link 36 is shaken in the left-right direction, and the weight guy link 36 The position becomes unstable. As a result, it becomes difficult to store the weight guy link 36 according to the turning operation of the HL mast 14. The present embodiment is characterized by the HL mast 14 and the pair of left and right mast backstops 29 in order to solve such a problem in storing the weight guy link 36. The pair of left and right weight guy links 36 are suspended from the tip of the HL mast 14 so as to be arranged on a pair of planes orthogonal to the rotation axis of the HL mast 14 and passing through the pair of left and right mast backstops 29, respectively. However, it may not completely coincide with the plane, and part or all of the mast backstop 29 overlaps (interferes with or touches) when viewed from the rear in a state where the weight guy link 36 is suspended. As long as they are arranged.

  FIG. 5 is a rear view of the HL mast 14 and the pair of left and right weight guy links 36 of the crane 10 according to the present embodiment. FIG. 6 is an enlarged perspective view of the periphery of the first guide 142A and the first receiving portion 141A in the HL mast 14 of the crane 10. 7 and 8 are enlarged perspective views of the periphery of the second guide 142B and the second receiving portion 141B in the HL mast 14 of the crane 10. FIG. 7 is a diagram in which the second guide 142B is in a protruding posture, and FIG. 8 is a diagram in which the second guide 142B is in a retracted posture.

  Referring to FIG. 5 (FIG. 11), the HL mast 14 includes a mast main body portion 14H, a pair of left and right first receiving portions 141A (mast side holding portions), a second receiving portion 141B (mast side holding portions), The third receiving portion 141C, the fourth receiving portion 141D, the fifth receiving portion 141E, the sixth receiving portion 141F, and a pair of left and right first guides 142A and 142B, respectively.

  The mast main body portion 14H is a main body portion of the HL mast 14, and includes four main pipes and a plurality of lattice pipes connecting these main pipes. As described above, the mast main body 14H can be divided into three members along the longitudinal direction (see the member lower mast 14A, the intermediate mast 14B, and the upper mast 14C in FIG. 11).

  As shown in FIGS. 5 and 11, the pair of left and right first receiving portions 141 </ b> A to 141 </ b> F is provided on the rear side surface of the mast main body portion 14 </ b> H above the back stop upper end portion 290 of the pair of left and right mast back stops 29. It is arrange | positioned at the right-and-left both ends. 141 A of 1st receiving parts and 141 B of 2nd receiving parts are arrange | positioned at intervals in the longitudinal direction in the uppermost part (upper mast 14C) of the mast main-body part 14H which can be divided | segmented. The first receiving portion 141 </ b> A and the second receiving portion 141 </ b> B can hold the upper portion of the weight guy link 36 when the weight guy link 36 is stored in the HL mast 14.

  Similarly, the third receiving portion 141C, the fourth receiving portion 141D, the fifth receiving portion 141E, and the sixth receiving portion 141F are spaced apart from each other in the longitudinal direction at the central portion (intermediate mast 14B) of the split mast main body portion 14H. Placed. The third receiving portion 141C, the fourth receiving portion 141D, the fifth receiving portion 141E, and the sixth receiving portion 141F hold the central portion in the vertical direction of the weight guy link 36 when the weight guy link 36 is stored in the HL mast 14. be able to.

  As shown in FIGS. 5 and 11, the pair of left and right first guides 142A and second guide 142B (both mast side guide portions and left and right pairs of mast side guide portions) Above the top upper end 290, the mast body 14H is disposed so as to protrude rearward from the left and right ends of the rear side surface. The first guide 142A and the second guide 142B are spaced apart from each other in the longitudinal direction of the HL mast 14, and are adjacent to the first receiving portion 141A and the second receiving portion 141B with a slight interval, respectively. Has been placed. The first guide 142A and the second guide 142B are configured such that when the weight guy link 36 is stored in the HL mast 14, the upper part of the weight guy link 36 is restrained in the left-right direction while the upper part of the weight guy link 36 is the first receiving portion 141A and the second guide 142B. It has a function of guiding to the receiving portion 141B.

  Referring to FIG. 6, the first receiving portion 141 </ b> A includes a concave portion 141 </ b> T that can grip the line portion 362 of the weight guy link 36, and a lock pin 141 </ b> S that prevents the line portion 362 from being detached. Further, the height of the first guide 142A protruding from the mast main body portion 14H is set to be higher than the height of the first receiving portion 141A protruding from the mast main body portion 14H. As a result, as described later, the first guide 142A comes into contact with the line portion 362 of the weight guy link 36 before the first receiving portion 141A.

  Further, as shown in FIG. 6, the first guide 142A is composed of a pair of guide members that are spaced apart from each other in the left-right direction. The first guide 142A allows the line portion 362 of the weight guy link 36 to be inserted between the pair of guide members. For this reason, as shown in FIG. 6, the front-end | tip part of a pair of guide member has a guide surface which spreads forward, and makes the approach of the line part 362 easy.

  7 and 8, the second guide 142B and the second receiving portion 141B have the same shape and function as the first guide 142A and the first receiving portion 141A. In the present embodiment, the protruding height of the second guide 142B relative to the mast main body portion 14H is larger than the protruding height of the first guide 142A relative to the mast main body portion 14H (FIGS. 7, 8, and 11). This is because the front end side of the HL mast 14 has a tapered shape, and the second guide before the lower end portion 36B of the weight guy link 36 abuts on the backstop guide 291 of the mast backstop 29 as described later. This is for bringing 142B into contact with the weight guy link 36.

  Further, referring to FIGS. 7 and 8, the second guide 142B having a large protrusion height is supported so as to be rotatable (possible to change the posture) with respect to the mast main body 14H. The guide fulcrum part 142S functions as a fulcrum part in the rotation of the second guide 142B. The fixed pin P is inserted into the pin holes PH1 and PH2 that are opened in accordance with the protruding posture (the guide posture capable of guiding the weight guy link 36) in FIG. 7 and the retracted posture in FIG. Fixed to each posture. Further, as shown in FIG. 8, the second guide 142B is in a posture along the longitudinal direction of the HL mast 14, and more specifically, below the upper end of the main pipe constituting the outer peripheral portion of the mast main body 14H. By arranging the second guide 142B, the space occupied by the HL mast 14 when the HL mast 14 is transported is reduced.

  FIG. 9 is a perspective view of a state in which a pair of left and right mast backstops 29 stands up with respect to the HL mast 14 in the crane 10 according to the present embodiment. FIG. 10 is a perspective view of the crane 10 with a pair of left and right mastback stops 29 lying on the HL mast 14. 9 and 10 show a posture in which the mast backstop 29 is lying on the ground as shown in FIG. Therefore, when the crane 10 as shown in FIG. 1 is used, the backstop lower end 295 of FIGS. 9 and 10 is positioned at the lower end of the mast backstop 29, and the backstop upper end 290 is the upper end of the mastback stop 29. Located in the department.

  Referring to FIGS. 9 and 10, the pair of left and right mast backstops 29 includes a backstop main body portion 29H, a backstop guide 291 (backstop side guide portion), and a backstop receiving portion 292 (backstop side), respectively. Holding portion) and a backstop support portion 29S.

  The backstop main body 29H is a main body portion of the mast backstop 29, and is made of a cylindrical pipe member. The above-described backstop upper end 290 is disposed at one end of the backstop body 29H, and the backstop lower end 295 is disposed at the other end of the backstop body 29H.

  The backstop receiving portion 292 is disposed at the center in the longitudinal direction of the backstop main body portion 29H. The backstop receiving portion 292 is disposed on the rear side surface of the backstop main body portion 29H of FIG. 1 and can hold the lower portion of the weight guy link 36 when the weight guy link 36 is stored in the HL mast 14. Note that the backstop receiving portion 292 has the same structure as the first receiving portion 141A described above.

  The backstop guide 291 is a member disposed between the backstop lower end portion 295 and the backstop receiving portion 292 (below the backstop receiving portion 292 in FIG. 11), and extends along the longitudinal direction of the mast backstop 29. It extends. Further, the backstop guide 291 is disposed on the rear side surface of the mast backstop 29 of FIG. When the weight guy link 36 is retracted with respect to the HL mast 14, the back stop guide 291 restrains the weight guy link 36 in the left-right direction until the lower part of the weight guy link 36 reaches the back stop receiving part 292. It has a function of guiding the lower end portion 36B.

  The backstop guide 291 has a substantially U shape in a cross section orthogonal to the longitudinal direction of the mast backstop 29. Specifically, the backstop guide 291 has a pair of left and right side walls 291A and a bottom portion 291B (see FIG. 20). As shown in FIG. 10, the lower end portion 36 </ b> B of the weight guy link 36 can be accommodated in the U-shaped portion of the backstop guide 291. Further, when the weight guy link 36 is stored in the HL mast 14, the lower end portion 36 </ b> B can move so as to slide inside the U-shaped portion of the backstop guide 291.

  The backstop support portion 29S supports the mastback stop 29 from below and keeps the posture (angle) of the mastback stop 29 with respect to the HL mast 14 constant.

<About storing the weight guy line>
As described above, in the disassembling process of the crane 10, the HL mast 14 shifts from the backward leaning posture to the forward leaning posture in the state change shown in FIGS. 2 to 3. FIGS. 11 to 15 are side views showing how the weight guy link 36 is stored in the HL mast 14 in the crane 10 according to the present embodiment. From FIG. 11 to FIG. 15, the ground angle θ of the HL mast 14 (the angle formed by the center line of the HL mast 14 and the ground G) is reduced from θ1 to θ5.

  In the state shown in FIG. 11 (ground angle θ 1), the lower end portion 36 B of the weight guy link 36 is disposed behind the back stop guide 291 of the mast back stop 29. Further, the upper portion of the weight guy link 36 is not in contact with the first guide 142A and the second guide 142B. In FIG. 11, the distal end portion of the first guide 142A and a part of the weight guy link 36 intersect each other. However, actually, the weight guy link 36 is the distal end portion of the pair of guide members of the first guide 142A. Are located between the forwardly expanded portions (FIG. 6).

  When the HL mast 14 is rotated forward from the state shown in FIG. 11 to the state shown in FIG. 12 (ground angle θ2), the uppermost line portion 362 of the weight guy link 36 is a pair of the first guide 142A. It enters between the guide members. As a result, the upper part of the weight guy link 36 is restrained in the left-right direction by the first guide 142A.

  When the HL mast 14 is further rotated forward from the state shown in FIG. 12 to reach the state shown in FIG. 13 (ground angle θ3), the uppermost line portion 362 of the weight guy link 36 is connected to the second guide 142B. It enters between a pair of guide members. As a result, the upper portion of the weight guy link 36 is restrained in the left-right direction by the second guide 142B in addition to the first guide 142A. Further, the lower end portion 36 </ b> B of the weight guy link 36 is close to the backstop guide 291 of the mast backstop 29. Further, when the HL mast 14 is rotated forward to reach the state shown in FIG. 14 (ground angle θ4), the lower end portion 36B of the weight guy link 36 enters the U-shaped portion (FIG. 10) of the backstop guide 291. At this time, the uppermost line portion 362 of the weight guy link 36 is held by the first receiving portion 141A.

  When the HL mast 14 is further rotated forward from the state shown in FIG. 14 to the state shown in FIG. 15 (ground angle θ5), the portion of the weight guy link 36 that is located above the upper end 290 of the backstop. Are held by the first receiving portion 141A, the second receiving portion 141B, the third receiving portion 141C, the fourth receiving portion 141D, the fifth receiving portion 141E, and the sixth receiving portion 141F. In addition, the weight guy link 36 bends at the link portion 363 located in the vicinity of the backstop upper end portion 290. The line part 362 positioned below the link part 363 is held by the backstop receiving part 292. That is, as the HL mast 14 rotates forward, the pair of left and right weight guy links 36 are held and stored in the HL mast 14 and the pair of left and right mast back stops 29.

  In the present embodiment, as described above, the lower end portions 36B of the pair of left and right weight guy links 36 are detached from the pallet weights 37, and the back stop lower end portions 295 of the pair of left and right mast back stops 29 are turned. When the HL mast 14 is rotated forward from the backward tilted posture while being detached from the body 11, the lower ends 36B of the pair of left and right weight guy links 36 reach the pair of left and right backstop guides 291 respectively. Prior to the timing, the first guide 142A and the second guide 142B with respect to the mast main body 14H so that the upper portions of the pair of left and right weight guy links 36 are restrained by the first guide 142A and the second guide 142B in the left-right direction. Is set (FIG. 11). For this reason, when the HL mast 14 is rotated, the upper portion of the weight guy link 36 is first restrained, so that the weight guy link 36 is prevented from shaking and changing in the left-right direction. As a result, the lower end portion 36B of the weight guy link 36 can smoothly enter the backstop guide 291. In other words, when the first guide 142A and the second guide 142B according to the present embodiment are not provided, the weight guy link 36 is left and right by the distance between the fulcrum part 36A and the lower end part 36B with the fulcrum part 36A as a fulcrum. It can swing freely in the direction. On the other hand, when the first guide 142A and the second guide 142B restrain the upper part of the weight guy link 36 as in the present embodiment, the weight guy link 36 is moved to the left and right by the distance between the second guide 142B and the lower end 36B. It can swing in the direction. Since the width of the U-shaped portion of the backstop guide 291 is set so as to be able to absorb the swing, the lower end portion 36B of the weight guy link 36 is connected to the backstop guide 291 when the HL mast 14 is rotated. Passing outside the door is suppressed. In this way, the weight guy link 36 is restrained from the upper side of the HL mast 14, so that the weight guy link 36 can be prevented from swinging left and right, and the weight guy link 36 can be stored in the backstop guide 291. The

  In the present embodiment, the HL mast 14 includes a plurality of left and right pairs of a first guide 142A and a second guide 142B (both are mast side guide portions) that are spaced apart from each other along the longitudinal direction. For this reason, when the HL mast 14 is rotated (FIGS. 11 to 15), the upper part of the weight guy link 36 is stably guided, and the weight guy link 36 can be prevented from shaking in the left-right direction and position fluctuation. it can.

  In the present embodiment, the first receiving part 141A and the second receiving part having a function of holding the weight guy link 36 with respect to the first guide 142A and the second guide 142B having the function of guiding the weight guy link 36. 141B are arranged at intervals in the longitudinal direction. For this reason, a structure suitable for the guide function and the holding function can be employed for each member. Specifically, in the first guide 142A and the second guide 142B, the distance between the pair of guide members is set larger than the width of the line part 362 of the weight guy link 36, so that the line part 362 is rotated when the HL mast 14 is rotated. Can easily enter between the pair of guide members. On the other hand, in the first receiving portion 141A and the second receiving portion 141B, the gap between the concave portions 141T (FIG. 6) that holds the line portion 362 is made close to the width of the line portion 362, thereby suppressing rattling of the line portion 362 during storage. be able to.

  In the present embodiment, the weight guy link 36 includes a plurality of line portions 362 and link portions 363. The link portion 363 connects the plurality of line portions 362 so that the plurality of line portions 362 can rotate around an axis extending in parallel with the rotation axis of the HL mast 14. In other words, the link part 363 has a structure that restricts the line part 362 from swinging in the left-right direction. Therefore, the shaking in the left-right direction of the weight guy link 36 when the HL mast 14 is rotated is further suppressed.

  FIG. 16 is a side view showing how the HL mast 14 shown in FIG. 15 is removed from the revolving unit 11. FIG. 17 is an enlarged side view of a part of the HL mast 14 of FIG. FIG. 18 is a side view of the crane 10 according to the present embodiment in which the weight guy link 36 is stored in the HL mast 14 and the pair of mast backstops 29 and can be transported. FIG. 19 is an enlarged side view of a part of the mast backstop 29 of FIG. 20 is a plan view of the mast backstop 29 of FIG. FIG. 21 is an enlarged side view of the HL mast 14 and the weight guy link 36 in the region A of FIG. 22 is a rear view of the HL mast 14 and the weight guy link 36 of FIG. FIG. 23 is an enlarged side view of the second receiving portion 141B and the second guide 142B of FIG.

  From the state shown in FIG. 15, through the state shown in FIG. 4, the HL mast 14 is suspended by the box mast 15 as shown in FIG. In the process from FIG. 4 to FIG. 16, the lower spreader 18 and the upper spreader 19 are moved from the tip of the HL mast 14 onto the lower mast 14A by another auxiliary crane or the like (FIG. 17). As a result, as will be described later, the lower spreader 18 and the upper spreader 19 can be transported together with the lower mast 14A.

  In FIG. 16, the upper part of the weight guy link 36 (the front part of FIG. 16) is stored on the upper surface part of the HL mast 14 (the rear side of the HL mast 14 of FIG. 1), and the lower part of the weight guy link 36. Is stored on a mast backstop 29 upright with respect to the HL mast 14. More specifically, as shown in FIG. 17, the link portion 363 located at the lowest position among the weight guy links 36 is placed on a mast bracket 14T fixed to the HL mast 14. And the line part 362 located in the lowest position among the weight guy links 36 extends rearward and upward from the link part 363. At this time, a part of the line part 362 is held by the backstop receiving part 292. Further, the lower end portion 36 </ b> B of the weight guy link 36 is disposed at the U-shaped portion of the backstop guide 291.

  When the pair of left and right backstop support portions 29S that respectively support the pair of left and right mastback stops 29 is reduced from the state shown in FIGS. 16 and 17, the mast backstop 29 is moved to the HL mast as shown in FIG. 14 (lower mast 14A) is laid down (FIG. 10). As described above, the lowermost link portion 363 among the weight guy links 36 is placed on the mast bracket 14T (FIGS. 21 and 22). The link part 363 has two fulcrum parts 363A and 363B (FIG. 21). For this reason, the line part 362 located at the lowest position among the weight guy links 36 can be rotated downward with the fulcrum part 363 </ b> B as a fulcrum in conjunction with the rotation of the mast backstop 29. During this time, the state in which the link portion 363 shown in FIG. 21 is placed on the mast bracket 14T is maintained. For this reason, the upper portion of the weight guy link 36 is prevented from moving greatly as the mast backstop 29 rotates.

  In other words, as shown in FIG. 21, the mast bracket 14T supports the fulcrum part 363B side of the link part 363 from below so that the link part 363 is inclined. Then, by utilizing the height of the link part 363 due to this inclination (the difference in height between the fulcrum part 363A side and the fulcrum part 363B side), the line part 362 located at the lowest position can be easily and safely rotated. The Even when the pair of left and right mast backstops 29 are rotated as shown in FIG. 18, the lower end portion 36B of the weight guy link 36 is maintained in the state of being arranged at the U-shaped portion of the backstop guide 291 (FIG. 19, FIG. 20). In FIG. 19 and FIG. 20, the lower end portion 36B when the weight of the pallet weight 37 is different and the length of the weight guy link 36 is set longer than that of the present embodiment is indicated by a two-dot chain line. Yes. That is, since the back stop guide 291 has a shape extending along the longitudinal direction of the mast back stop 29, the lower end 36B can slide in the back stop guide 291 when the HL mast 14 is rotated as described above. 19 and 20, even when the length of the weight guy link 36 is set to be different, the lower end 36B can be safely disposed in the backstop guide 291 during storage.

  As shown in FIG. 18, after the pair of left and right mast backstops 29 are laid down on the HL mast 14, the HL mast 14 is divided into a lower mast 14A, an intermediate mast 14B, and an upper mast 14C to be transportable. . At this time, the link portions 363 of the weight guy links 36 are arranged corresponding to the division positions of the lower mast 14A and the intermediate mast 14B and the division positions of the intermediate mast 14B and the upper mast 14C, respectively. For this reason, the weight guy link 36 can be divided at the link portion 363. Therefore, a part of the divided weight guy link 36 can be transported together with each divided mast portion. At this time, as described above, the lower spreader 18 and the upper spreader 19 can be transported together with the lower mast 14A (FIG. 17).

  In the state shown in FIG. 18, the second guide 142B extends upward from the mast main body 14H (FIGS. 7 and 23). For this reason, by changing the posture of the second guide 142B from the protruding posture (guide posture) to the retracted posture (two-dot chain line in FIGS. 8 and 23), when the upper mast 14C (FIG. 18) is transported, Occupied space is reduced. Note that a similar storage mechanism may also be provided in the first guide 142A.

  In addition, as described above, the method for retracting the weight guy link 36 of the crane 10 according to the present embodiment includes the revolving unit 11, the boom 13 supported by the revolving unit 11 so as to be rotatable about a horizontal rotation axis, An HL mast 14 rotatably supported by the revolving body 11 around a rotation axis parallel to the rotation axis of the boom 13 at a rear side position of the boom 13, and a rear side of the rotation axis of the HL mast 14. A pair of left and right mast backstops 29 that connect the HL mast 14 and the revolving body 11 in position and prevent the HL mast 14 from falling backward, and a pair of left and right mastback stops orthogonal to the rotation axis of the HL mast 14. Connected to the pair of left and right weight guy links 36 respectively suspended from the tip of the HL mast 14 so as to be arranged on a pair of planes passing through 29 and the lower ends of the pair of left and right weight guy links 36 A pallet weight 37 which is a method of storing weights Guy link 36 of the crane 10 with a. The storage method includes removing the lower ends 36B of the pair of left and right weight guy links 36 from the pallet weights 37 in a state where the HL mast 14 is in a rearwardly inclined posture extending rearward and upward from the revolving structure 11; The HL mast 14 is rotated forward from the backward tilted posture, and the upper portions of the pair of left and right weight guy links 36 are respectively moved in the left-right direction by the pair of left and right first guides 142A and 142B provided in the HL mast 14. Restraining and rotating the HL mast 14 further forward, the pair of left and right backstop guides 291 provided in the pair of left and right mast backstops 29 causes the lower end portions 36B of the pair of left and right weight guy links 36 to move in the left-right direction. Each restraining and rotating the HL mast 14 further forward, By holding the lower portions of the pair of left and right weight guy links 36 by the pair of left and right back stop receiving portions 292 provided on the mast back stop 29, the weight guy link 36 is connected to the HL mast 14 and the pair of left and right mast back stops 29. Storing.

  According to this method, when the HL mast 14 is rotated, the upper portion of the weight guy link 36 is first restrained, so that the weight guy link 36 is restrained from shaking and changing in the left-right direction. As a result, the lower end portion 36B of the weight guy link 36 can smoothly enter the backstop guide 291.

  In addition, the weight guy link 36 according to the present embodiment is stored on the rear side surface of the HL mast 14 before the lower end portion 36B of the pair of left and right weight guy links 36 is restrained by the pair of left and right backstop guides 291. It further comprises constraining the upper portions of the pair of left and right weight guy links 36 in order by a plurality of first guides 142A and second guides 142B arranged at intervals in the direction.

  According to this method, when the HL mast 14 is rotated (FIGS. 11 to 15), the upper part of the weight guy link 36 is stably guided, and the weight guy link 36 is prevented from shaking in the left-right direction and position fluctuation. can do.

  The weight guy link 36 according to the present embodiment is stored in the longitudinal direction of the HL mast 14 before the lower portions of the pair of left and right weight guy links 36 are held by the pair of left and right backstop receiving portions 292. It further includes holding the upper portions of the pair of left and right weight guy links 36 in order by the plurality of first receiving portions 141A to sixth receiving portions 141F arranged at intervals.

  According to this method, when the HL mast 14 is rotated (FIGS. 11 to 15), the upper portion of the weight guy link 36 is stably held, and the weight guy link 36 is prevented from shaking in the left-right direction and position fluctuation. can do.

  In addition, the transportation method of the weight guy link 36 according to the present embodiment includes the storage method of the weight guy link 36 described above and the state in which the weight guy link 36 is stored in the HL mast 14 and the mast backstop 29. The HL mast 14 and the weight guy link with the weight guy link 36 stored in the HL mast 14 and the mast backstop 29 by turning the mast 14 further forward to incline the ground. And 36 are integrally transported.

  According to this method, when the HL mast 14 is transported, the space occupied by the HL mast 14 and the weight guy link 36 is reduced.

  The weight guy link 36 according to the present embodiment is transported along the longitudinal direction of the HL mast 14 and the weight guy link 36 with the weight guy link 36 stored in the HL mast 14 and the mast backstop 29. It further comprises dividing into a plurality of regions and transporting the HL mast 14 and the weight guy link 36 in each region integrally.

  According to this method, the HL mast 14 and the weight guy link 36 can be divided and transported as a single unit, and the need to prepare a transport vehicle or a plurality of vehicles having a large space for transporting separately is reduced. The

  In the above, the crane 10 which concerns on embodiment of this invention, the storage method of the weight guy line of the crane 10, and the transportation method were demonstrated. The present invention is not limited to these forms. The present invention can take, for example, the following modified embodiments.

  (1) In the above-described embodiment, the weight guy link 36 has been described as constituting the weight guy line according to the present invention, but the present invention is not limited to this. The weight guy line according to the present invention may be a cable, rope, wire or the like other than the guy link.

  (2) In the above-described embodiment, the first guide 142A and the second guide 142B, and the first receiving portion 141A and the second receiving portion 141B have been described as being composed of different members. It is not limited to. As an example, the first guide 142A and the second guide 142B may be combined with the mast side holding portion and the mast side guide portion of the present invention without including the first receiving portion 141A and the second receiving portion 141B. The base end portions of the pair of guide members of the seventh second guide 142B constitute a mast side holding portion according to the present invention, and the line portion 362 of the weight guy link 36 is fitted between the pair of guide members. The line part 362 may be guided and held. In this case, the guide and holding of the weight guy link 36 are realized with a simple configuration.

  (3) In the above-described embodiment, the HL mast 14 is suspended by the box mast 15 and removed from the revolving unit 11. However, the present invention is not limited to this, and the HL mast 14 is separated by another crane. May be suspended and removed from the revolving unit 11.

10 Crane 11 Rotating body (Crane body)
12 traveling body 13 boom 130 boom idler sheave 13S boom foot 14 HL mast (mast)
140 Mast Idle Sheave 141A First receiving part (mast side holding part)
141B Second receiving part (mast side holding part)
141C Third receiving portion 141D Fourth receiving portion 141E Fifth receiving portion 141F Sixth receiving portion 141S Holding portion 142A First guide (mast side guide portion)
142B 2nd guide (mast side guide part)
142S guide fulcrum part 14A lower mast 14B intermediate mast 14C upper mast 14H mast main body (mast main body)
14S HL mast foot 14T mast bracket 15 box mast 15S box mast foot 18 lower spreader 19 upper spreader 20 guy line 21 boom hoisting rope 22 boom hoisting winch 23 mast guy link 24 mast hoisting rope 25 mast hoisting winch 26 sheave block 27 Sheave block 28 Boom back stop 29 Mast back stop 290 Back stop upper end (mast side end)
291 Backstop guide (Backstop side guide)
292 Backstop receiving part (backstop side holding part)
295 Backstop lower end (end of main body side)
29H Backstop body (backstop body)
29S Backstop support 30 Main winding winch 30S Main winding idler 31 Additional winding winch 31S Additional winding idler 32 Main winding rope 33 Additional winding rope 34 Main hook 36 Weight guy link (weight guy line)
361 Cylinder 362 Line part 363 Link part 36A A fulcrum part (Guy line upper end part)
36B Lower end (Guyline lower end)
37 Pallet weight (weight)
P Fixing pin

Claims (11)

The crane body,
A boom supported by the crane body so as to be rotatable around a horizontal rotation axis;
A mast that is pivotally supported by the crane body about a pivot axis parallel to the boom pivot axis at a rear position of the boom, and extends rearward and upward from the crane body. A mast that functions as a support column in the rotation of the boom in an inclined posture;
A pair of left and right mastback stops that prevent the mast from falling backward at a position rearward of the rotation axis of the mast, the pair of mastback stops being on the mast side connected to the mast A pair of left and right mastback stops each having an end and a main body side end capable of contacting the crane main body;
A pair of left and right weight guy lines hanging from the tip of the mast so as to be respectively disposed on or near a pair of planes orthogonal to the rotation axis of the mast and passing through the pair of left and right mast backstops. A pair of left and right weight guy lines each having a guy line upper end and a guy line lower end supported rotatably at the tip of the mast;
A weight connected to the lower end of the pair of left and right weight guy lines;
With
The mast is
A mast body rotatably supported by the crane body;
At least a pair of left and right mast side holding portions that are disposed on the rear side surface of the mast main body above the mast side end portions of the pair of left and right mast backstops and can respectively hold the upper portions of the pair of left and right weight guy lines. When,
The mast body is disposed so as to protrude rearward from the rear side surface of the mast body above the mast side end, and the upper portion of the weight guy line is restrained in the left and right direction while restraining the pair of left and right weight guy lines in the left and right directions. At least a pair of left and right mast side guide portions for guiding to the side holding portion;
Have
The pair of left and right mast backstops each have a backstop body supported by the mast,
A backstop-side holding portion that is disposed on the rear side surface of the backstop body, and that can hold the lower portion of the weight guy line;
The lower end of the guy line of the weight guy line is disposed on the rear side of the back stop body until the lower part of the weight guy line reaches the back stop side holding part while restraining the weight guy line in the left-right direction. A backstop side guide for guiding
Have
In a state where the lower end portions of the guy lines of the pair of right and left weights are respectively detached from the weights and the main body side ends of the pair of left and right mast backstops are detached from the crane body, the mast is The pair of left and right weights before the timing at which the lower end portions of the pair of left and right weight guy lines respectively reach the pair of left and right backstop side guides when rotated forward from a rearward tilt posture A crane in which the mast side guide portion protrudes from the mast body with a protruding amount such that the upper portion of the guide line is restrained by the mast side guide portion in the left-right direction.   2. The crane according to claim 1, wherein the at least one pair of left and right mast side guide portions includes a plurality of left and right pairs of mast side guide portions arranged at intervals from each other along a longitudinal direction of the mast.   The at least one pair of left and right mast-side guide portions change posture between a guide posture that protrudes from the mast main body and can guide the weight guy line, and a retracted posture that is arranged along the rear side surface of the mast main body. The crane according to claim 1 or 2, which is enabled. The mast side guide portions are a pair of guide members that are spaced apart from each other in the left-right direction, and a pair of guide members that allow the weight guide line to be inserted between the pair of guide members. Have
The mast side holding portion is configured by a base end portion of the pair of guide members, and the mast side holding portion is inserted into the weight guide line by fitting the weight guide line between the pair of guide members. The crane according to any one of claims 1 to 3, wherein the crane is held.   The crane according to any one of claims 1 to 3, wherein the mast side guide portion is disposed at a distance from the mast side holding portion in a longitudinal direction of the mast. The weight guy line is a guy link,
A plurality of line sections;
A plurality of link portions connecting the plurality of line portions to each other so that the plurality of line portions can be rotated around an axis extending in parallel with the rotation axis;
The crane according to any one of claims 1 to 5, comprising: A crane body, a boom supported by the crane body so as to be rotatable around a horizontal rotation axis, and a crane body about a rotation axis parallel to the rotation axis of the boom at a rear position of the boom. A mast that is pivotally supported on the mast, a pair of left and right mast backstops that prevent the mast from falling backward at a position behind the rotation axis of the mast, and a rotation axis of the mast. A pair of left and right weight guy lines suspended from the tip of the mast so as to be arranged on or near a pair of planes orthogonal to each other and passing through the pair of left and right mast backstops, and a pair of left and right weight guy lines A weight connected to a lower end, and a storage method of the weight guy line of the crane comprising:
Removing the lower ends of the pair of left and right weight guy lines from the weights in a state where the mast is in a rearwardly inclined posture extending rearward and upward from the crane body;
Rotating the mast forward from the backward inclined posture, and restraining the upper portions of the pair of left and right weight guy lines in the left-right direction by a pair of left and right mast side guides provided in the mast,
Rotating the mast further forward and restraining the lower end portions of the pair of left and right weights in the left and right directions by a pair of left and right backstop side guides provided on the pair of left and right mastbackstops;
The mast is further rotated forward, and the lower portions of the left and right weight guide lines are held by the left and right pair of back stop side holding portions provided in the left and right pair of mast back stops. Storing a guy line in the mast and the mast backstop;
A method for storing a crane weight line.   A plurality of mast-side guide portions arranged at intervals in the longitudinal direction on the rear side surface of the mast before lower ends of the pair of left and right weight guy lines are restrained by the pair of left and right backstop side guide portions. The crane's weight guy line storage method according to claim 7, further comprising constraining the upper portions of the pair of left and right weight guy lines in order.   Before the lower portions of the pair of left and right weight guy lines are held by the pair of left and right backstop side holding portions, the left and right sides are separated by a plurality of mast side holding portions arranged in the longitudinal direction of the mast. The crane weight guy line storage method according to claim 7 or 8, further comprising: sequentially holding upper portions of the pair of weight guy lines. A method for storing a crane weight weight line according to any one of claims 7 to 9,
With the weight guy line stored in the mast and the mast backstop, by rotating the mast further forward, the mast is laid down on the ground,
Transporting the mast and the weight guy line integrally with the weight guy line stored in the mast;
A method of transporting a crane weight guy line. In the state where the weight guy line is stored in the mast, the mast and the weight guy line are divided into a plurality of areas along the longitudinal direction, and the mast and the weight guy line in each area are integrally formed, respectively. Transportation,
The transportation method of the guy line for weight of a crane of Claim 10 further equipped with these.

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