JP2020029349A - Upper spreader mounting device - Google Patents

Abstract

To facilitate alignment of a mounting hole for mounting an upper spreader on a derricking member.SOLUTION: An upper spreader mounting device 50 comprises an upper spreader 60 and a mounting part 80. The mounting part 80 comprises a guide part 83 that guides a part 70 to be guided, a regulating part 85 that regulates movement of the part 70 to be guided, and a rotation stopping part 87 that restricts rotation of the upper spreader 60 with a lateral direction Y as a rotation shaft. A mounting hole 89 at the mounting part side is arranged at a position adjacent to a mounting hole 65 at the upper spreader side of the upper spreader 60 when the part 70 to be guided contacts the guide part 83 and the regulating part 85 and the upper spreader 60 contacts the rotation stopping part 87.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to an upper spreader mounting device for mounting an upper spreader on an undulating member of a crane.

  For example, Patent Literature 1 describes a conventional crane. In the technique described in the document (see FIG. 2 of the document), an upper spreader (a bridle in the document) is attached to an undulating member (a boom in the document). In this technique, a guided portion (a roller in the document) is guided by a guide portion (an inclined surface in the document). Then, the positions of the mounting holes on the upper spreader side (pin holes in the same document) and the mounting holes on the undulating member side (fixing holes in the same document) are aligned. Then, the upper spreader is mounted on the undulating member by inserting the mounting pin into the mounting hole.

JP-A-9-278369

  When the upper spreader moves toward the mounting position of the undulating member, the upper spreader is in an unstable state (details will be described later). Therefore, the upper spreader may be inclined in various directions with respect to the undulating member. Therefore, it is difficult to align the mounting hole on the upper spreader and the mounting hole on the undulating member with the technique described in the document.

  Accordingly, an object of the present invention is to provide an upper spreader mounting device that can easily position a mounting hole for mounting an upper spreader on an undulating member.

  The upper spreader mounting device is provided on the undulating member of the crane. The upper spreader mounting device includes an upper spreader and a mounting portion. The attachment portion is attached to the undulating member, and the upper spreader is attached. The upper spreader includes an upper spreader frame, an upper spreader sheave, a guided portion, and an upper spreader-side mounting hole. The upper spreader sheave is rotatably mounted on the upper spreader frame. The guided portion is provided on the upper spreader frame. The upper spreader-side mounting hole is formed in the upper spreader frame, and a mounting pin can be inserted therein. The mounting part includes a guide part, a regulating part, a rotation stopping part, and a mounting part side mounting hole. The guide portion is capable of contacting the guided portion, and guides the guided portion along an inclined direction that is a direction inclined with respect to an axial direction of the undulating member. The regulating portion is capable of contacting the guided portion, and regulates movement of the guided portion in the tilt direction. The rotation stopper is capable of contacting the upper spreader and restricts rotation of the upper spreader about a horizontal axis as a rotation axis. The mounting pin can be inserted into the mounting portion side mounting hole. The mounting portion side mounting hole is disposed at a position where the mounting portion side mounting hole matches the upper spreader side mounting hole when the guided portion comes into contact with the guide portion and the regulation portion and the upper spreader comes into contact with the rotation stopper. You.

  With the above configuration, the positioning of the mounting hole for mounting the upper spreader on the undulating member can be easily performed.

It is the figure which looked at the crane 1 provided with the upper spreader attachment device 50 of 1st Embodiment from the side. FIG. 2 is a side view of a boom 20, an upper spreader 60, a mounting portion 80, and the like shown in FIG. FIG. 3 is a diagram corresponding to FIG. 2, showing a state in which a guided portion 70 and the like shown in FIG. FIG. 4 is a side view of a guided portion 70 and the like shown in FIG. 3. FIG. 4 is a top view of the upper spreader 60 and the mounting portion 80 shown in FIG. 3. FIG. 4 is a sectional view taken along arrow F6-F6 in FIG. 3. FIG. 4 is a sectional view taken along arrow F7-F7 in FIG. 3. FIG. 2 is a view of the gantry 30, the upper spreader 60, the mounting portion 80, and the like shown in FIG. 1 as viewed from above. FIG. 9 is a side view of the gantry 30 shown in FIG. 8. It is sectional drawing which shows the upper spreader mounting apparatus 250 of 2nd Embodiment, Comprising: It is a figure corresponding to F10-F10 arrow sectional drawing of FIG. It is the figure which looked at the upper spreader mounting apparatus 350 of 3rd Embodiment from the side, and is a figure equivalent to FIG.

(1st Embodiment)
The crane 1 including the upper spreader mounting device 50 of the first embodiment shown in FIG. 1 will be described with reference to FIGS.

  The crane 1 is a working machine that performs a work using the boom 20 (up and down members), for example, a construction machine that performs a construction work. The crane 1 includes a lower body 11, an upper revolving unit 13, a boom 20, a gantry 30 (an undulating member), a lower spreader 41, a guy line 43, an undulating winch 45, an undulating rope 47, and an upper spreader mounting device. 50.

  The lower body 11 supports the upper swing body 13 from the lower side Z2. The lower body 11 may be movable or may not be movable. The crane 1 may be a mobile crane or a fixed crane. The upper swing body 13 (the crane body) can swing with respect to the lower body 11. A boom 20 is rotatably attached to the upper swing body 13. A gantry 30 is attached to the upper swing body 13. The direction in which the rotation axis of the upper swing body 13 extends with respect to the lower body 11 is defined as a vertical direction Z. In the vertical direction Z, the side from the lower body 11 toward the upper revolving unit 13 is defined as an upper side Z1, and the opposite side is defined as a lower side Z2. The direction in which the rotation axis of the boom 20 extends with respect to the upper swing body 13 is defined as a lateral direction Y. A direction orthogonal to each of the horizontal direction Y and the vertical direction Z is referred to as a front-rear direction X. In the front-rear direction X, the side from the mounting position of the gantry 30 to the upper rotating body 13 toward the mounting position of the boom 20 to the upper rotating body 13 is defined as a front side X1, and the opposite side is defined as a rear side X2.

  The boom 20 (up / down member) is attached to the upper swing body 13 so as to be rotatable (up and down). The boom 20 is attached to a front X1 portion of the upper swing body 13. For example, the boom 20 is a lattice boom having a lattice structure in which pipes are combined. A central axis of the boom 20, which extends in the longitudinal direction of the boom 20, is referred to as a boom central axis 20a. When the boom 20 is turned down so that the direction in which the boom center axis 20a extends is horizontal, the surface serving as the upper surface of the boom 20 is referred to as a boom back surface 20b, and the surface serving as the lower surface of the boom 20 is referred to as a boom abdominal surface 20c. . The boom 20 includes a lower boom 21, an intermediate boom 23, and an upper boom 25.

(Direction related to the boom 20)
The direction in which the boom center axis 20a extends is referred to as a boom axis direction Xb. In the boom axial direction Xb, the side from the base end of the boom 20 (the part on the side attached to the upper swing body 13) toward the tip end (the part opposite to the side attached to the upper swing body 13) is the boom tip side. Xb1 and the opposite side is the boom base end side Xb2. The direction in which the rotation axis of the boom 20 extends with respect to the upper swing body 13 (lateral direction Y) is also referred to as boom lateral direction Yb. A direction orthogonal to each of the boom axis direction Xb and the boom lateral direction Yb is referred to as a boom vertical direction Zb. In the boom vertical direction Zb, the side from the boom abdominal surface 20c to the boom back surface 20b is referred to as a boom upper side Zb1 (upper member), and the opposite side is referred to as a boom lower side Zb2 (lower member lower side).

  The lower boom 21 includes the base end of the boom 20. The upper boom 25 includes the tip of the boom 20. The intermediate boom 23 is provided between the lower boom 21 and the upper boom 25. The lower boom 21, the middle boom 23, and the upper boom 25 are connected by a connecting tool such as a pin. By adjusting the number of intermediate booms 23 (two in the example shown in FIG. 1), the overall length of the boom 20 is adjusted.

  The gantry 30 (up / down member), the lower spreader 41, the guy line 43, the up / down winch 45, the up / down rope 47, and the upper spreader 60 (described later) constitute a boom up / down device that raises and lowers the boom 20 with respect to the upper rotating body 13.

  The gantry 30 is attached to the upper swing body 13 and is also called an A frame. The gantry 30 is arranged on the rear side X2 of the boom 20. The gantry 30 includes a compression member 31 and a tension member 33.

  The compression member 31 is attached to the upper swing body 13 so as to be able to undulate (rotate). The compression member 31 is detachably attached to the upper swing body 13 via a pin. When the crane 1 is used (during crane work, when lifting work is performed, etc.), the compression member 31 is arranged so as to extend from the base end to the front end to the rear side X2 and the upper side Z1. Is done. When disassembling and assembling the crane 1, the compression member 31 may be in a lying posture. The compression member 31 in the lying posture is arranged such that the longitudinal direction of the compression member 31 extends in the front-rear direction X so as to extend from the base end toward the front end toward the rear side X2 (see FIG. 9). The upper surface of the compression member 31 when the compression member 31 is in the lying posture is defined as a gantry back surface 30b. For example, the compression member 31 includes two (a pair of left and right) structures arranged at an interval in the horizontal direction Y.

  The tension member 33 is connected to the distal end portion of the compression member 31 (the part of the compression member 31 opposite to the side attached to the upper rotating body 13) and the upper rotating body 13. The tension member 33 includes two (a pair of left and right) members arranged at an interval in the horizontal direction Y. For example, each of the left and right members is a member obtained by connecting link members. The tension member 33 is folded when the crane 1 is not used (see FIG. 9).

  The lower spreader 41 is provided at the tip of the gantry 30 (of the compression member 31). As shown in FIG. 8, the lower spreader 41 includes a lower spreader shaft 41a and a plurality of lower spreader sheaves 41s. The lower spreader shaft 41a is a shaft that rotatably supports the lower spreader sheave 41s. The lower spreader shaft portion 41a extends in the horizontal direction Y and connects the left and right compression members 31 to each other. As shown in FIG. 1, the lower spreader sheave 41 s is a pulley on which the undulating rope 47 is hung. The lower spreader sheave 41s may include a vertical sheave and a horizontal sheave (not shown), or may include only a vertical sheave. The direction of the rotation axis of the lower spreader sheave 41s of the vertical sheave is the horizontal direction Y. The lower spreader sheave 41s of the vertical sheave is rotatably supported by the lower spreader shaft 41a (see FIG. 8), and more specifically, is attached to the lower spreader shaft 41a via a bearing (not shown). The direction of the rotation axis of the lower spreader sheave 41 s of the horizontal sheave (not shown) is a linear direction connecting the lower spreader 41 and the upper spreader 60, and a direction orthogonal to each of the horizontal directions Y. As shown in FIG. 8, when the lower spreader sheave 41 s is formed of only vertical sheaves, the width (in the horizontal direction Y) of the plurality of lower spreader sheaves 41 s as a whole is smaller than when the lower spreader sheave 41 s includes a horizontal sheave. (Wide width) is easy to narrow. For example, all the lower spreader sheaves 41s are arranged so as to fit inside the left and right compression members 31 in the lateral direction Y.

  The guide line 43 is connected to the upper spreader 60 and the tip of the boom 20 (upper boom 25) when the crane 1 shown in FIG. 1 is used. The guide line 43 may not be connected to the upper spreader 60 when the crane 1 is disassembled. For example, the guy line 43 may include a rope (a guy rope, a pendant rope), may include a link (a guy link), or may include a rope and a link.

  The hoisting winch 45 (boom hoisting winch) winds and unwinds the hoisting rope 47. The undulation winch 45 may be attached to the compression member 31 as in the example shown in FIG. 1 or may be attached to the upper swing body 13 (not shown).

  The undulation rope 47 is wound around the undulation winch 45. The hoisting rope 47 is pulled out from the hoisting winch 45, is hung on the lower spreader 41, and is hung on the lower spreader 41 and the upper spreader 60. The tip of the undulating rope 47 is fixed to a predetermined location. When the hoisting winch 45 winds and unwinds the hoisting rope 47, the distance between the lower spreader 41 and the upper spreader 60 changes. When the crane 1 is used, the upper spreader 60 and the tip of the boom 20 are connected by the guy line 43, so that when the interval between the lower spreader 41 and the upper spreader 60 changes, the boom 20 moves relative to the upper revolving unit 13. Undulate.

  The upper spreader attaching device 50 is a device for attaching the upper spreader 60 to the undulating member (such as the boom 20). The upper spreader mounting device 50 facilitates mounting of the upper spreader 60 to a undulating member (such as the boom 20). The upper spreader mounting device 50 includes an upper spreader 60, a mounting portion 80, and mounting pins 90 (see FIG. 3).

  The upper spreader 60 constitutes a boom raising / lowering device. As shown in FIG. 2, the upper spreader 60 includes an upper spreader frame 61, an upper spreader shaft 62, an upper spreader sheave 63, an upper spreader side mounting hole 65, a guided portion support portion 67, and a guided portion. 70.

(Direction related to upper spreader 60)
The directions related to the upper spreader 60 include a spreader front-rear direction Xs, a spreader lateral direction Ys, and a spreader vertical direction Zs. As shown by the two-dot chain line in FIG. 1, the undulating rope 47 and the guy line 43 are connected to the upper spreader 60, and the undulating rope 47 and the guy line 43 are arranged in a substantially straight line (hereinafter, this state is referred to as the upper spreader 60). "Use state"). The spreader front-rear direction Xs (see FIG. 2) is a direction in which the hoisting rope 47 and the guy line 43 extend when the upper spreader 60 is in use. In the spreader front-rear direction Xs shown in FIG. 2, the side from the undulating rope 47 toward the guy line 43 is referred to as a spreader front side Xs1, and the opposite side is referred to as a spreader rear side Xs2. The spreader lateral direction Ys is a direction that coincides (or substantially coincides) with the lateral direction Y when the upper spreader 60 is in use. In the spreader lateral direction Ys shown in FIG. 5, the side toward the center of the upper spreader 60 (the center in the spreader lateral direction Ys) is defined as the inside of the spreader lateral direction Ys, and the side away from the central part of the upper spreader 60 is defined as the spreader lateral direction Ys. Outside. The spreader vertical direction Zs shown in FIG. 2 is a direction orthogonal to each of the spreader longitudinal direction Xs and the spreader lateral direction Ys. Note that FIG. 2 and the like show a state where the spreader front-rear direction Xs and the front-rear direction X match, but the spreader front-rear direction Xs does not need to match the front-rear direction X.

  The upper spreader frame 61 is a frame (structure) that supports the upper spreader sheave 63 and the guided portion 70. For example, the upper spreader frame 61 includes a side member 61b and a guy line connecting portion 61d.

  As shown in FIG. 4, the side members 61b constitute both sides (left and right) of the upper spreader 60 outside the spreader lateral direction Ys. The side member 61b is a plate-like member extending in the spreader front-rear direction Xs and the spreader vertical direction Zs.

  The guy line connecting portion 61d is a portion to which the guy line 43 is attached, as shown in FIG. The guide line connecting portion 61d includes, for example, a pin hole, and includes, for example, a pin hole into which a pin for attaching the guide line 43 to the upper spreader 60 can be inserted. The guy line connecting portion 61d is provided on the side member 61b.

  As shown in FIG. 5, the upper spreader shaft portion 62 supports the upper spreader sheave 63 so as to be rotatable around a rotation axis in the spreader lateral direction Ys. The upper spreader shaft portion 62 is fixed to the upper spreader frame 61 and connects, for example, left and right side members 61b. The upper spreader shaft portion 62 extends in the spreader lateral direction Ys.

  The upper spreader sheave 63 is a pulley on which the undulating rope 47 (see FIG. 2) is hung. The upper spreader sheave 63 is rotatably attached to the upper spreader frame 61. More specifically, the upper spreader sheave 63 is attached to the upper spreader shaft 62 via a bearing 63b (see FIG. 6). The upper spreader sheave 63 is a vertical sheave. The direction of the rotation axis of the upper spreader sheave 63, which is a vertical sheave, is the spreader lateral direction Ys. More specifically, the upper spreader sheave 63 is rotatable with respect to the upper spreader frame 61 about a rotation axis in the spreader lateral direction Ys. The upper spreader sheave 63 is arranged between the left and right side members 61b (in the spreader lateral direction Ys). When all of the upper spreader sheaves 63 are vertical sheaves, the overall dimension (total width) of the plurality of upper spreader sheaves 63 in the horizontal direction Ys of the spreader can be reduced as compared to the case where the upper spreader sheaves 63 include horizontal sheaves. As a result, the size of the upper spreader 60 in the spreader lateral direction Ys can be reduced. The upper spreader sheave 63 may be a horizontal sheave (not shown). The direction of the rotation axis of the upper spreader sheave 63 that is a horizontal sheave is the spreader vertical direction Zs. For example, the upper spreader sheave 63 is disposed in the upper spreader 60 at the portion Xs2 behind the spreader.

  As shown in FIG. 3, the upper spreader-side mounting hole 65 is a hole into which the mounting pin 90 can be inserted (more specifically, an inner surface of the hole). The upper spreader-side mounting hole 65 is a portion for connecting the upper spreader 60 to the mounting portion 80 with the mounting pin 90. As shown in FIG. 2, the upper spreader-side mounting hole 65 is formed in the upper spreader frame 61, for example, in the side member 61b.

  The guided portion support portion 67 rotatably supports the guided portion 70 with respect to the upper spreader frame 61. The guided portion support portion 67 is fixed to the upper spreader frame 61. As shown in FIG. 5, the guided portion support portion 67 projects from the upper spreader frame 61 in the spreader lateral direction Ys. The arrangement of the guided portion support portion 67 with respect to the upper spreader frame 61 is the same as the arrangement of the guided portion 70 with respect to the upper spreader frame 61 described later. The guided portion support portion 67 extends in the spreader lateral direction Ys. The guided portion support portion 67 may also be used as the upper spreader shaft portion 62 (may be integrally formed) as in the example shown in FIG. 5, or may be provided separately from the upper spreader shaft portion 62. Good.

  As shown in FIG. 2, the guided portion 70 is movable along a guide portion 83 (described later), and is guided by the guide portion 83. The guided portion 70 is provided on the upper spreader frame 61. As shown in FIG. 5, the guided portions 70 are provided on both sides (left and right) of the upper spreader 60 in the spreader lateral direction Ys.

  The guided portion 70 is preferably arranged at a position where the guided portion 70 and other members are unlikely to interfere with each other when the upper spreader 60 is transported. Specifically, the guided portion 70 is located at a position facing the upper spreader frame 61 (for example, the side member 61b) in the spreader lateral direction Ys, and at a position wider than the upper spreader frame 61 (for example, the side member 61b). It is arranged inside Ys. The guided portion 70 is arranged on the inner side in the spreader lateral direction Ys with respect to the outer side surface (side surface) of the upper spreader frame 61 in the spreader lateral direction Ys. In addition, the guided part 70 may be arrange | positioned rather than the outer surface of the upper spreader frame 61 (of the side member 61b) in the spreader lateral direction Ys outside.

  As shown in FIG. 2, the guided portion 70 is configured so that the guide portion 83 can be moved smoothly. Specifically, the guided portion 70 is a roller that can rotate with respect to the guided portion support portion 67. The guided portion 70 is attached to the upper spreader frame 61 so as to be rotatable about a guided portion central axis 70a. For example, the guided portion 70 is attached to the guided portion support portion 67 via a bearing 70b (see FIG. 6). The guided portion center axis 70a may extend in a direction coinciding with the spreader lateral direction Ys, or may extend in a direction substantially coincident with the spreader lateral direction Ys. As shown in FIG. 6, when the guided portion support portion 67 and the upper spreader shaft portion 62 are also used, the guided portion center axis 70a is concentric with the center axis of the upper spreader shaft portion 62. In this case, the guided portion 70 is arranged concentrically with the upper spreader sheave 63.

  When the guided portion 70 is guided by the guide portion 83 shown in FIG. 2, the guided portion 70 is configured so that the upper spreader sheave 63 can be prevented from interfering with the guide portion 83 and the like. More specifically, the guided portion 70 is disposed radially outside the upper spreader sheave 63 (radially outward with respect to the rotation axis of the upper spreader sheave 63). When the guided portion 70 is a roller and the guided portion 70 and the upper spreader sheave 63 are concentric, the guided portion 70 has a larger diameter than the upper spreader sheave 63.

  At least a part of the guided portion 70 (for example, a portion that comes into contact with the guide portion 83) may be made of, for example, metal or resin (for example, nylon, for example, a nylon roller). The guided portion 70 may be fixed to the upper spreader frame 61. In this case, the guided portion 70 is, for example, a member (slide member) that can slide the guide portion 83, and is, for example, a resin slide pad. When at least a part of the guided portion 70 is made of resin, the guided portion 70 can be made lighter than when the entire guided portion 70 is made of metal. As a result, the stability of the crane 1 (see FIG. 1) can be improved, and the lifting ability of the crane 1 can be improved.

  The mounting portion 80 is a portion to which the upper spreader 60 is mounted, as shown in FIG. The mounting portion 80 includes a boom-side mounting portion 80B provided on the boom 20 and a gantry-side mounting portion 80G provided on the gantry 30. For example, the boom-side attachment portion 80B is attached to the boom back surface 20b. For example, the gantry-side mounting portion 80G is mounted on the gantry rear surface 30b. The boom-side mounting portion 80B and the gantry-side mounting portion 80G have the same or substantially the same configuration. Hereinafter, the boom-side mounting portion 80B will be mainly described. As shown in FIG. 5, the mounting portions 80 (specifically, the boom-side mounting portions 80B) are provided on both sides (left and right) of the boom 20 in the boom lateral direction Yb. The mounting portion 80 includes a left mounting portion 80L, which is a left mounting portion 80 (left side when viewed toward the boom tip side Xb1), and a right mounting portion 80R, which is a right mounting portion 80. The right attachment portion 80R and the left attachment portion 80L are provided symmetrically (or substantially symmetrically) in the boom lateral direction Yb. Hereinafter, as the mounting portion 80, the right mounting portion 80R of the boom-side mounting portion 80B will be mainly described. As shown in FIG. 2, the mounting portion 80 includes a mounting portion frame 81, a guide portion 83, a regulating portion 85, a rotation stopping portion 87, and a mounting portion side mounting hole 89.

  The mounting portion frame 81 is a structure that forms the mounting portion 80. For example, the attachment frame 81 is fixed to the boom 20. The attachment frame 81 may be fixed to the boom 20 by, for example, welding or a fixing member (for example, a bolt and a nut, for example, a pin). For example, the attachment frame 81 may be fixed to the lower boom 21 or may be fixed to the intermediate boom 23 (see FIG. 1). For example, the attachment frame 81 may be fixed to the boom tip side Xb1 portion of the lower boom 21. For example, the mounting portion frame 81 may be fixed to an inner portion of the boom 20 in the lateral direction Yb rather than an outer end of the boom lateral direction Yb as shown in FIG. It may be fixed to a part (not shown). As shown in FIG. 2, the mounting portion frame 81 projects from the boom rear surface 20b to the boom upper side Zb1. The attachment frame 81 includes a first attachment frame 81a and a second attachment frame 81b.

  As shown in FIG. 5, the first mounting portion frame 81a is a bracket to which the upper spreader 60 is connected. For example, the first mounting portion frame 81a has a plate shape or the like, and extends in the boom vertical direction Zb and the boom axial direction Xb. The first mounting portion frames 81a are provided two by two on one mounting portion 80 (two on the right mounting portion 80R and two on the left mounting portion 80L). As shown in FIG. 7, the first mounting portion frame 81a includes an inner plate 81ai and an outer plate 81ao. The outer plate 81ao is arranged outside the inner plate 81ai in the boom lateral direction Yb.

  As shown in FIG. 2, the second mounting portion frame 81b is a member (a guide member, for example, a guide plate) including a guide portion 83. For example, the second mounting portion frame 81b has a plate shape or the like, and extends in the boom vertical direction Zb and the boom axial direction Xb. The second mounting portion frame 81b is disposed closer to the boom base end side Xb2 than the first mounting portion frame 81a. Note that, for example, the second mounting portion frame 81b may be rotatable (for example, storable) with respect to the first mounting portion frame 81a when the mounting portion 80 is not used, and may be removable from the first mounting portion frame 81a. May be. Further, the mounting frame 81 does not have to be divided into the first mounting frame 81a and the second mounting frame 81b (see the third embodiment).

  The guide portion 83 can contact the guided portion 70 and guides the guided portion 70 along the inclined direction D1. More specifically, the guide section 83 moves the guided section 70 along the inclined direction D1 while making the guided section 70 contact the guide section 83. The guide portion 83 is fixed to the boom 20. The guide portion 83 is provided, for example, on the attachment frame 81, and is provided (for example, formed) on the second attachment frame 81b, for example. The inclination direction D1 of the guide portion 83 (inclined portion, inclined surface) is inclined with respect to the boom axis direction Xb. The guide portion 83 is inclined with respect to the boom axis direction Xb such that the boom tip side Xb1 is disposed on the boom lower side Zb2 (downward). The guide portion 83 may be inclined with respect to the boom axis direction Xb such that the base end side Xb2 of the boom is disposed on the lower side of the boom Zb2 (downward). Hereinafter, a case where the guide portion 83 is inclined forward and downward will be described. When the guide portion 83 is inclined backward and downward, for example, the boom tip side Xb1 and the boom base end side Xb2 in the following description may be reversed.

  The inclination direction D1 of the guide portion 83 is a direction along the inclination of the guide portion 83. When viewed from the boom lateral direction Yb, the inclination direction D1 of the guide portion 83 may be a direction along a straight line (including one line and a broken line), a direction along a curve, or a line including a straight line and a curve. It may be along the direction. The inclination of the guide portion 83 (the inclination in the inclination direction D1 with respect to the boom axis direction Xb) may change stepwise along the guide portion 83, may change continuously, or may not change. In the inclined direction D1, the direction of movement (the traveling direction) of the guided portion 70 when the guided portion 70 moves to the lower side Z2 (boom lower side Zb2) along the guide portion 83 is defined as the inclined lower side D1a. The opposite direction is referred to as an inclined upper side D1b (see FIG. 4).

  The restricting portion 85 can contact the guided portion 70, and restricts the movement of the guided portion 70 with respect to the mounting portion 80. The restricting portion 85 is continuous with the guide portion 83 in the example shown in FIG. 2, and may be discontinuous with the guide portion 83 (for example, may be separated). The restricting portion 85 is fixed to the boom 20. The restricting portion 85 is provided, for example, on the mounting portion frame 81, and is provided (for example, formed) on the second mounting portion frame 81b, for example. The restricting portion 85 may have a plate shape or a block shape. As shown in FIG. 4, the regulating portion 85 includes an inclination direction regulating portion 85a, a separation direction regulating portion 85b, and an arc-shaped portion 85c.

  The inclination direction restricting portion 85a regulates the movement of the guided portion 70 in the inclination direction D1 (to the lower inclined side D1a) and the movement of the guided portion 70 along the guide portion 83. For example, the inclination direction restricting portion 85a is disposed at a position where it can contact at least a part of the first range A85a on the surface of the guided portion 70. The first range A85a is a range of the surface of the guided portion 70 facing the inclined lower side D1a. In FIG. 4, the first range A85a is shown at a position away from the guided portion 70 (the same applies to the second range A85b).

  The separation direction restricting portion 85b restricts the movement of the guided portion 70 in a direction in which the guided portion 70 separates from the guide portion 83. More specifically, the separation direction restricting portion 85b moves in a direction (separation direction D2) in which the guided portion 70 separates from the guide portion 83 when the guided portion 70 is in contact with the guide portion 83 and the inclination direction restricting portion 85a. Of the guided part 70 is restricted. The separation direction D2 is a direction orthogonal to the inclination direction D1, and is a direction facing the boom tip side Xb1. The separation direction restricting portion 85b restricts the guided portion 70 from coming off the guide portion 83 by restricting the movement of the guided portion 70 in the separation direction D2, and the separation direction of the upper spreader 60 (see FIG. 5). Restrict movement to D2. For example, the separation direction restricting portion 85b is arranged at a position where it can contact at least a part of the second range A85b on the surface of the guided portion 70. The second range A85b is a range of the surface of the guided portion 70 facing the separation direction D2 (excluding the portion facing the inclined upper side D1b). At least a part of the separation direction restriction part 85b may be a part of the inclination direction restriction part 85a, or may be provided separately from the inclination direction restriction part 85a.

  The restricting portion 85 is arranged so as to suppress interference with the guided portion 70 when the upper spreader 60 is removed from the mounting portion 80 shown in FIG. More specifically, the regulating section 85 is arranged as follows. A state in which the boom 20 takes a posture when the upper spreader 60 is removed from the mounting part 80 and the guided part 70 contacts the guide part 83 and the regulating part 85 (for example, a state shown in FIG. 3) is referred to as a state α. I do. In this state α, as shown in FIG. 4, the restricting portion 85 is disposed only outside the region directly above the guided portion 70 (directly above the region A70). The region A70 directly above is a region through which the guided portion 70 passes if the guided portion 70 is linearly moved from the state of the state α in a direction coinciding with the upper side Z1. When the upper spreader 60 is removed from the mounting portion 80 shown in FIG. 3, the area (track) through which the guided part 70 passes may coincide with the area A70 directly above the area shown in FIG. A70 may be used. Here, the posture of the boom 20 when the upper spreader 60 is removed from the mounting portion 80 (hereinafter, the “posture of the boom 20 in the state α”) is as follows. For example, the posture of the boom 20 in the state α is a posture in which the lower boom 21 shown in FIG. 1 and the boom 20 (the intermediate boom 23 and the upper boom 25) on the tip side of the lower boom 21 are separated. is there. For example, the posture of the boom 20 in the state α is a posture where the ends of the front side X1 and the lower side Z2 of the lower boom 21 land. The posture of the boom 20 in the state α may be, for example, a posture in which the boom back surface 20b is arranged in a horizontal direction, or a posture in which the boom back surface 20b is arranged in a substantially horizontal direction, as shown in FIG. Note that the posture of the gantry 30 when the upper spreader 60 is removed from the gantry-side mounting portion 80G shown in FIG. 9 is, for example, a posture in which the gantry rear surface 30b is arranged in a horizontal direction or a substantially horizontal direction.

  As shown in FIG. 4, the arc-shaped portion 85c is a portion for holding the guided portion 70 in a stable state. The arc-shaped portion 85c has an arc shape when viewed from the boom lateral direction Yb. The arc-shaped portion 85c is formed along the outer peripheral surface of the guided portion 70. The radius of curvature of the arcuate portion 85c is equal to or approximately equal to the radius of the guided portion 70. The arc-shaped portion 85c is configured to make surface contact or substantially surface contact with the outer peripheral surface of the guided portion 70. The arc-shaped portion 85c is provided on at least one of the inclination direction restriction portion 85a and the separation direction restriction portion 85b, and may be provided on both of them.

  As shown in FIG. 3, the rotation stopper 87 restricts rotation of the upper spreader 60 about the horizontal direction Y as a rotation axis. Details of the function of the rotation stopping portion 87 are as follows. When the guided portion 70 is in contact with the guide portion 83 and the regulating portion 85, the upper spreader 60 can rotate around the guided portion 70 (for example, around the guided portion central axis 70a). At this time, the upper spreader 60 can rotate around the rotation axis in the boom lateral direction Yb. The rotation stopper 87 regulates this rotation of the upper spreader 60. The rotation stopping portion 87 is arranged, for example, so as to be able to contact the upper spreader frame 61, and is arranged, for example, to be able to support the upper spreader frame 61 from the boom lower side Zb2. The rotation stopping portion 87 is fixed to the boom 20. The rotation stopper 87 may be fixed (for example, fixed by welding) to the attachment frame 81, for example, may be fixed to the first attachment frame 81a, or may be fixed to the second attachment frame 81b, for example. For example, as shown in FIG. 7, the rotation stopping portion 87 is disposed between the inner plate 81ai and the outer plate 81ao in the boom lateral direction Yb. In the example shown in FIG. 7, the rotation stopper 87 may be fixed to the outer plate 81ao and fixed to the inner plate 81ai, or may be fixed to the outer plate 81ao and the inner plate 81ai. The rotation stopping portion 87 may have a block shape or a plate shape. In the example shown in FIG. 3, when viewed from the lateral direction Y, the rotation stopping portion 87 has a substantially sector shape, a substantially semicircular shape, and may have other shapes.

  The mounting portion side mounting hole 89 is a hole into which the mounting pin 90 can be inserted (more specifically, the inner surface of the hole). As shown in FIG. 2, the mounting portion side mounting hole 89 is fixed to the boom 20. For example, the mounting portion side mounting hole 89 is formed in the first mounting portion frame 81a. As shown in FIG. 7, the mounting portion side mounting hole 89 is formed in each of the inner plate 81ai and the outer plate 81ao such that the mounting pin 90 can pass through the inner plate 81ai and the outer plate 81ao. The details of the position of the mounting portion side mounting hole 89 will be described later.

  As shown in FIG. 3, the mounting pin 90 is a member (a mounting member, a connecting member) for mounting the upper spreader 60 to the mounting portion 80. The mounting pin 90 is inserted into the upper spreader side mounting hole 65 and the mounting portion side mounting hole 89. Thus, the mounting pin 90 connects the upper spreader 60 and the mounting portion 80.

(Position of mounting hole 89 on mounting part side)
The mounting portion side mounting holes 89 are arranged as follows. The mounting portion side mounting hole 89 is located at a position where the mounting portion side mounting hole 89 matches the upper spreader side mounting hole 65 when the guided portion 70 comes into contact with the guide portion 83 and the regulating portion 85 and the upper spreader 60 comes into contact with the rotation stopper 87. Be placed. The positions of the restricting portion 85 and the rotation stopping portion 87 are set such that the mounting portion side mounting hole 89 is arranged at such a position. At this time, when viewed from the boom lateral direction Yb, the mounting portion side mounting hole 89 is disposed at a position overlapping the upper spreader side mounting hole 65. The position of the mounting portion side mounting hole 89 with respect to the arc-shaped portion 85c and the like is set as follows. As shown in FIG. 2, the center of the arc of the arc-shaped portion 85c is defined as an arc center O1. The distance from the rotation axis of the guided portion 70 to the upper spreader frame 61 (the guided portion center axis 70a) to the center of the upper spreader-side mounting hole 65 is defined as a center-to-center distance L1. When viewed from the boom lateral direction Yb, an arc whose center is the arc center O1 and whose radius is the center-to-center distance L1 is referred to as an arc C1. At this time, the mounting portion side mounting hole 89 is arranged on the arc C1. For example, when viewed from the boom lateral direction Yb, the center of the mounting portion side mounting hole 89 is disposed on the circular arc C1.

(Actuation)
The crane 1 (particularly the upper spreader mounting device 50) shown in FIG. 1 is configured to operate as follows. When the crane 1 is transported, the crane 1 is in a disassembled state. This is because the components of the crane 1 are mounted on a transportation vehicle (such as a trailer), and the mass and dimensions during transportation are kept within regulated values. For example, at the time of transportation, the lower boom 21 and the boom 20 (the intermediate boom 23 and the upper boom 25) on the distal end side of the lower boom 21 are in a separated state. For example, during transportation, the lower boom 21 may be attached to the upper swing body 13 or may be separated from the upper swing body 13.

(Disassembly of crane 1)
The crane 1 is disassembled as follows. When the crane 1 is in a workable state, the boom 20 is in a state of being raised upside Z1 with respect to the upper swing body 13 (not shown). In this state, the hoisting rope 47 is fed out (loosen) by the hoisting winch 45. Then, the tip (upper boom 25) of the boom 20 lands. Then, the undulating rope 47 is further extended by the undulating winch 45. Then, the upper spreader 60 moves to the lower side Z2 toward the mounting portion 80 (here, the boom-side mounting portion 80B). At this time, the upper spreader 60 is affected by the tension of the undulating rope 47, the tension of the guy line 43, and the center of gravity of each of the upper spreader 60, the undulating rope 47, and the guy line 43. Therefore, the upper spreader 60 moves toward the mounting portion 80 while tilting in various directions (while rotating about the front-back direction X, the vertical direction Z, and the horizontal direction Y as rotation axes).

  As shown in FIG. 2, when the upper spreader 60 moves to the position of the mounting portion 80, the guided portion 70 contacts the guide portion 83 and moves along the guide portion 83 to the inclined lower side D <b> 1 a. When the guided part 70 is moving along the guide part 83, the upper spreader 60 may be inclined in various directions. When the guided portion 70 further moves to the lower inclined side D1a, the guided portion 70 contacts not only the guide portion 83 but also the regulating portion 85, as shown in FIG. At this time, as shown in FIG. 4, the inclination direction restricting portion 85a restricts the movement of the guided portion 70 in the inclination direction D1 (the inclined lower side D1a) of the guide portion 83. The separation direction restricting portion 85b restricts the movement of the guided portion 70 in a direction in which the guided portion 70 is separated from the guide portion 83 (separation direction D2).

  When the hoisting rope 47 shown in FIG. 1 is further fed out by the hoisting winch 45, the spreader front side Xs1 portion of the upper spreader frame 61 shown in FIG. 3 moves to the lower side Z2. At this time, the upper spreader frame 61 rotates about the guided portion center axis 70a of the guided portion 70. Then, the upper spreader frame 61 comes into contact with the rotation stopper 87. Then, the movement of the upper spreader frame 61 to the lower side Z2 of the spreader front side Xs1 is restricted. Note that the upper spreader 60 may contact the rotation stopper 87 before the guided part 70 contacts the regulating part 85.

  When the guided portion 70 contacts the guide portion 83 and the regulating portion 85 and the upper spreader frame 61 contacts the rotation stopping portion 87, the positions of the upper spreader side mounting hole 65 and the mounting portion side mounting hole 89 are aligned. The upper spreader 60 is mounted on the mounting portion 80 by inserting the mounting pin 90 into the upper spreader side mounting hole 65 and the mounting portion side mounting hole 89. As described above, only by moving the upper spreader 60 to the lower side Z2, the guided portion 70 moves along the guide portion 83, the upper spreader frame 61 contacts the rotation stopper 87, and the upper spreader side mounting hole 65 is formed. And the mounting portion side mounting hole 89 are aligned. Therefore, troublesome work such as manually moving (for example, shaking) the upper spreader 60 with respect to the boom 20 for alignment of the mounting hole can be eliminated or reduced.

  As shown in FIG. 5, the guided portions 70 are provided (left and right) on both sides of the upper spreader 60 in the spreader lateral direction Ys. Further, each of the guide portion 83 and the regulating portion 85 is provided (left and right) on both sides of the boom 20 in the boom lateral direction Yb. Accordingly, the left and right guided portions 70 contact the left and right guide portions 83 and contact the left and right regulating portions 85. Therefore, the upper spreader 60 is arranged such that the spreader lateral direction Ys and the boom lateral direction Yb coincide or substantially coincide with each other. At this time, when viewed from the boom axis direction Xb, the upper spreader 60 does not tilt (or substantially does not tilt) with respect to the boom 20 left and right. Further, the rotation stopper 87 shown in FIG. 3 regulates the rotation of the upper spreader 60 about the boom lateral direction Yb as a rotation axis. Therefore, the positions of the upper spreader-side mounting hole 65 and the mounting portion-side mounting hole 89 are matched in the left and right portions of the upper spreader 60 and the left and right mounting portions 80 (the right mounting portion 80R and the left mounting portion 80L). Therefore, the right and left mounting pins 90 can be easily inserted into the left and right upper spreader side mounting holes 65 and the mounting portion side mounting holes 89, respectively.

  Next, the guy line 43 is removed from the upper spreader 60 with the upper spreader 60 shown in FIG. Further, the boom 20 (the intermediate boom 23 and the upper boom 25) on the distal end side of the lower boom 21 is detached from the lower boom 21. After that, the compression member 31 is brought to the laid-down posture by a device that raises and lowers the compression member 31 (for example, a cylinder (not shown)). Next, the upper spreader 60 is lifted by an auxiliary crane (not shown), and the mounting pins 90 are removed from the upper spreader side mounting holes 65 and the mounting portion side mounting holes 89 shown in FIG. This auxiliary crane is a crane different from the crane 1 used for assembling and disassembling the crane 1 shown in FIG. 1, for example, used for assembling and disassembling the boom 20.

  With the mounting pins 90 removed, the upper spreader 60 is lifted. Here, as shown in FIG. 4, the regulating portion 85 is located only outside the region A70 directly above the guided portion 70. Therefore, when the upper spreader 60 is lifted and the guided portion 70 moves to the upper side Z1, the guided portion 70 does not easily interfere with the regulating portion 85. At this time, for example, the guided portion 70 does not contact the regulating portion 85. Further, for example, even if the guided portion 70 comes into contact with the regulating portion 85, the guided portion 70 easily moves to the upper side Z1. As a result, the upper spreader 60 shown in FIG. 1 easily moves to the upper side Z1 smoothly.

  While the upper spreader 60 is lifted, the undulating rope 47 is wound around the undulating winch 45. Then, the upper spreader 60 moves above (such as a position directly above) the compression member 31 in the lying state. Next, as shown in FIG. 9, the upper spreader 60 is attached to the gantry-side attachment portion 80G. The operation for attaching the upper spreader 60 to the gantry-side attachment portion 80G is the same as the operation for attaching the upper spreader 60 to the boom-side attachment portion 80B (see FIG. 1).

  With the upper spreader 60 attached to the gantry 30, the gantry 30 is lifted by an auxiliary crane or the like. At this time, the pin connecting the compression member 31 and the upper rotating body 13 shown in FIG. 1 is removed, and the pin connecting the tension member 33 and the upper rotating body 13 is removed. Then, when the gantry 30 is lifted, the gantry 30 is removed from the upper swing body 13. The gantry 30 is loaded on a transport vehicle, for example. At this time, the gantry 30 shown in FIG. 9 is in a state in which the undulation winch 45, the undulation rope 47 (only the center line of the undulation rope 47 is shown in FIG. 9), the lower spreader 41, and the upper spreader 60 are attached. At this time, the up-and-down rope 47 is wound around the up-and-down winch 45 and is wound around the lower spreader 41 and the upper spreader 60. Therefore, when the gantry 30 is attached or detached, there is no need to perform a complicated operation such as hanging the hoisting rope 47. Note that at least one of the undulation winch 45, the undulation rope 47, and the upper spreader 60 may be transported separately from (separated from) the gantry 30. Further, the upper spreader 60 does not have to be transported while being attached to the gantry 30, and the gantry-side attachment portion 80G does not need to be provided.

(Assembly of crane 1)
The assembling of the crane 1 shown in FIG. 1 is performed by a procedure reverse to or substantially reverse to the disassembly of the crane 1 described above. However, when the crane 1 is assembled, the guided portion 70 shown in FIG. 3 is guided by the guide portion 83 when the crane 1 is disassembled. When the crane 1 is assembled, the guided portion 70 is lifted from the regulating portion 85 when the crane 1 is disassembled.

(Action by vertical sheave)
When the upper spreader sheave 63 shown in FIG. 8 is a vertical sheave, there are the following advantages. In the case where the upper spreader sheave 63 is a horizontal sheave, the overall dimension (full width) of the plurality of upper spreaders 60 in the spreader lateral direction Ys is the diameter of the upper spreader sheave 63 and the number of upper spreader sheaves 63 arranged in the spreader lateral direction Ys. Is determined. As a result, the size of the upper spreader 60 in the lateral direction Ys of the spreader may become larger as it exceeds the size of the gantry 30 in the lateral direction Y, for example. In this case, when the upper spreader 60 is attached to the gantry 30, a part of the upper spreader 60 protrudes outward in the lateral direction Y from the gantry 30. Then, the upper spreader 60 protruding outward in the lateral direction Y from the gantry 30 may interfere with surrounding objects (for example, the cab or guard of the upper swing body 13 shown in FIG. 1). On the other hand, as shown in FIG. 8, when the upper spreader sheave 63 is a vertical sheave, the size of the upper spreader 60 in the spreader lateral direction Ys can be smaller than when the upper spreader sheave 63 is a horizontal sheave. Therefore, when the upper spreader 60 is attached to the gantry 30, it is possible to suppress the upper spreader 60 from interfering with surrounding objects. Note that the upper spreader sheave 63 may be a horizontal sheave.

(effect)
The effect of the upper spreader mounting device 50 shown in FIG. 1 is as follows. In the following description of the effect, the case where the mounting portion 80 is the boom-side mounting portion 80B will be described, but the mounting portion 80 may be a gantry-side mounting portion 80G. When the mounting portion 80 is the gantry-side mounting portion 80G, for example, the boom 20 in the following description may be replaced with the gantry 30.

(Effect of the first invention)
The upper spreader mounting device 50 is provided on the boom 20 (up / down member) of the crane 1. The upper spreader mounting device 50 includes an upper spreader 60 and a mounting portion 80. The attachment section 80 is attached to the boom 20. The upper spreader 60 is attached to the attachment portion 80. As shown in FIG. 2, the upper spreader 60 includes an upper spreader frame 61, an upper spreader sheave 63, a guided portion 70, and an upper spreader-side mounting hole 65. The upper spreader sheave 63 is rotatably attached to the upper spreader frame 61. The guided portion 70 is provided on the upper spreader frame 61. The upper spreader-side mounting hole 65 is formed in the upper spreader frame 61, and allows a mounting pin 90 (see FIG. 3) to be inserted.

  [Configuration 1-1] The mounting portion 80 includes a guide portion 83, a regulating portion 85, a rotation stopping portion 87, and a mounting portion side mounting hole 89. The guide portion 83 can contact the guided portion 70 and guides the guided portion 70 along an inclination direction D1 that is a direction inclined with respect to the boom axis direction Xb (the axial direction of the up-and-down member). The restricting portion 85 can contact the guided portion 70 and restricts movement of the guided portion 70 in the tilt direction D1. As shown in FIG. 3, the rotation stopper 87 can contact the upper spreader 60 and regulates the rotation of the upper spreader 60 about the horizontal direction Y as a rotation axis. The mounting pin 90 can be inserted into the mounting portion side mounting hole 89.

  [Configuration 1-2] When the guided portion 70 comes into contact with the guide portion 83 and the regulating portion 85 and the upper spreader 60 comes into contact with the rotation stopping portion 87, the upper spreader-side mounting hole 65 is formed. It is arranged in a position that matches.

  In the above [Configuration 1-1], the guided portion 70 moves along the guide portion 83, contacts the regulating portion 85, and is restricted from moving in the tilt direction D1. Further, the upper spreader 60 comes into contact with the rotation stopping portion 87, and the rotation about the rotation axis in the lateral direction Y is restricted. In this state, the mounting portion side mounting hole 89 is arranged at a position that matches the upper spreader side mounting hole 65 (the above [Configuration 1-2]). Therefore, in a state where the movement of the guided portion 70 in the inclination direction D1 and the rotational movement of the upper spreader 60 about the lateral direction Y are restricted, the upper spreader side mounting hole 65 and the mounting portion side mounting hole 89 Can be adjusted. Therefore, a state where the position of the upper spreader side mounting hole 65 and the position of the mounting portion side mounting hole 89 match can be easily maintained. Therefore, the positioning of the mounting holes (upper spreader side mounting hole 65 and mounting portion side mounting hole 89) of the mounting pin 90 for mounting the upper spreader 60 to the mounting portion 80 can be easily performed. As a result, the work load for positioning the mounting holes of the mounting pins 90 can be reduced, and the working efficiency can be improved.

(Effect of the Second Invention)
[Structure 2] As shown in FIG. 4, when the guided portion 70 comes into contact with the regulating portion 85, the regulating portion 85 (specifically, the separation direction regulating portion 85b) The movement of the guided portion 70 in the separating direction (separating direction D2) is restricted.

  According to the above [Configuration 2], the movement of the guided portion 70 in the direction in which the guided portion 70 separates from the guide portion 83 (separation direction D2) is not restricted, and the guided portion 70 is Is easy to keep in contact. As a result, it is easy to maintain a state where the positions of the upper spreader side mounting hole 65 and the mounting portion side mounting hole 89 shown in FIG. Therefore, the positioning of the mounting holes (the upper spreader-side mounting hole 65 and the mounting portion-side mounting hole 89) of the mounting pin 90 can be performed more easily.

(Effect of the third invention)
[Configuration 3] A state in which the boom 20 takes a posture when the upper spreader 60 is removed from the mounting portion 80, and a state in which the guided portion 70 contacts the guide portion 83 and the regulating portion 85 is referred to as a state α. In the state α, as shown in FIG. 4, the restricting portion 85 is disposed only outside the region directly above the guided portion 70 (directly above the region A70).

  According to the above [Configuration 3], when the upper spreader 60 is removed from the mounting portion 80 shown in FIG. 3 to the upper side Z1, the guided portion 70 does not easily interfere with the regulating portion 85. Therefore, the work of removing the upper spreader 60 from the mounting portion 80 to the upper side Z1 can be easily performed.

(Effect of the fourth invention)
[Configuration 4] The guided portion 70 is a roller attached to the upper spreader frame 61 so as to be rotatable around a rotation axis in the spreader lateral direction Ys.

  According to the above [Configuration 4], the guided portion 70 can move more smoothly with respect to the guide portion 83 than when the guided portion 70 is fixed to the upper spreader frame 61.

(Effect of the fifth invention)
The upper spreader 60 includes an upper spreader shaft 62. The upper spreader shaft portion 62 is fixed to the upper spreader frame 61 and rotatably supports the upper spreader sheave 63 around a rotation axis in the spreader lateral direction Ys.

  [Configuration 5] The guided portion 70 is arranged concentrically with the upper spreader sheave 63, and is rotatably attached to the upper spreader shaft portion 62.

  According to the above [Configuration 5], there is no need to provide a member for supporting the guided portion 70 separately from the upper spreader shaft portion 62 for supporting the upper spreader sheave 63. As a result, the upper spreader 60 can be configured simply, the cost of the upper spreader 60 can be suppressed, and the weight of the upper spreader 60 can be reduced. As a result, the stability of the crane 1 (see FIG. 1) can be improved, and the lifting ability of the crane 1 can be improved.

(Effect of the sixth invention)
[Structure 6] As shown in FIG. 4, the restricting portion 85 includes an arc-shaped portion 85c. The arc-shaped portion 85c has an arc shape when viewed from the boom lateral direction Yb, and is formed along the outer peripheral surface of the guided portion 70.

  According to the above [Configuration 6], the regulating portion 85 can more reliably hold the guided portion 70 than when the regulating portion 85 does not extend along the outer peripheral surface of the guided portion 70. As a result, it is easy to keep the guided portion 70 in contact with the regulating portion 85. As a result, as shown in FIG. 3, it is easy to maintain a state where the positions of the upper spreader-side mounting hole 65 and the mounting portion-side mounting hole 89 are aligned. Therefore, the positioning of the mounting holes (the upper spreader-side mounting hole 65 and the mounting portion-side mounting hole 89) of the mounting pin 90 can be performed more easily.

(Effect of the seventh invention)
[Arrangement 7] As shown in FIG. 2, the arc-shaped center of the arc-shaped portion 85c is defined as an arc center O1. The distance from the rotation axis of the guided portion 70 to the upper spreader frame 61 (the guided portion center axis 70a) to the center of the upper spreader-side mounting hole 65 is defined as a center-to-center distance L1. When viewed from the lateral direction Y, the mounting portion side mounting hole 89 is disposed on an arc C1 having a radius of the center distance O1 about the arc center O1.

  In the above [Configuration 7], as shown in FIG. 3, when the upper spreader 60 is rotated about the guided portion center axis 70a in a state where the guided portion 70 contacts the arcuate portion 85c, the upper spreader side The position of the mounting hole 65 and the position of the mounting portion side mounting hole 89 are surely matched.

(Effect of the eighth invention)
[Configuration 8] The upper spreader sheave 63 is rotatable with respect to the upper spreader frame 61 about a rotation axis in the spreader lateral direction Ys. The guided portion 70 is arranged radially outside the upper spreader sheave 63.

  According to the above [Configuration 8], the guided portion 70 can be easily brought into contact with the guide portion 83, and the upper spreader sheave 63 can be prevented from coming into contact with the guide portion 83.

(Effect of the ninth invention)
[Configuration 9] As shown in FIG. 5, the guided portion 70 is arranged at a position facing the upper spreader frame 61 in the spreader lateral direction Ys and inside the upper spreader frame 61 in the spreader lateral direction Ys.

  According to the above [Configuration 9], for example, when the crane 1 (see FIG. 1) is assembled or disassembled, an object arranged outside the upper spreader frame 61 in the spreader lateral direction Ys and the guided portion 70 interfere with each other. Can be suppressed. Therefore, breakage of the guided portion 70 can be suppressed.

(2nd Embodiment)
With reference to FIG. 10, differences between the upper spreader mounting device 250 of the second embodiment and the first embodiment will be described. Note that, of the upper spreader mounting device 250 of the second embodiment, common points to the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted. About the point which abbreviate | omits description of a common point, description of other embodiment mentioned later is also the same. The guided portion 270 and the guide portion 283 of the upper spreader mounting device 250 shown in FIG. 10 are different from the guided portion 70 and the guide portion 83 (see FIG. 3) of the upper spreader mounting device 50 shown in FIG. , Respectively.

  The upper spreader mounting device 250 includes a protrusion 270c and a groove 283c. The protruding portion 270c may be provided in the guided portion 270 as in the example shown in FIG. 10, or may be provided in the guide portion 283 (not shown). The groove 283c is provided by one of the guided portion 270 or the guide portion 283 which is different from the one provided with the protruding portion 270c. The direction in which the tip 270c1 of the protruding portion 270c and the bottom 283c1 of the groove 283c face each other is defined as a facing direction D3. The facing direction D3 is a direction orthogonal to the boom lateral direction Yb, and is, for example, a radial direction of the guided portion 270 (see FIG. 3). Hereinafter, a case will be mainly described in which the guided portion 270 includes the protruding portion 270c and the guide portion 283 includes the groove portion 283c, as in the example illustrated in FIG. When the guided portion 270 includes the groove portion 283c and the guide portion 283 includes the protruding portion 270c, for example, the guided portion 270 and the guide portion 283 in the following description are replaced with each other, and the upper spreader 60 and the boom 20 ( And FIG. 6).

  The protruding portion 270c protrudes from the base of the guided portion 270 (guided portion base 270b) toward the guide portion 283 in the facing direction D3 (for example, radially outward of the guided portion 270).

  The groove 283c can insert the protrusion 270c. The groove 283c has a shape recessed in the facing direction D3. Each of the groove portion 283c and the protruding portion 270c is substantially V-shaped when viewed from a direction orthogonal to each of the facing direction D3 and the boom lateral direction Yb. Therefore, the guided portion 270 is guided in the boom lateral direction Yb so that the displacement of the guided portion 270 relative to the guide portion 283 in the boom lateral direction Yb is reduced (so that the guided portion 270 is arranged at a regular position). More specifically, the guided portion 270 is guided in the boom lateral direction Yb so that the displacement of the tip portion 270c1 and the bottom portion 283c1 in the boom lateral direction Yb is reduced. The guide portion 283 is tapered on both sides (left and right) of the boom lateral direction Yb with respect to the bottom portion 283c1. The surface of the groove 283c that the protrusion 270c can contact is referred to as the “inner wall” of the groove 283c. The inner wall of the groove 283c includes an outer inner wall 283o and an inner inner wall 283i. The outer inner wall 283o is a portion of the inner wall of the groove 283c, which is located outside the bottom 283c1 in the boom lateral direction Yb. The inner inner wall 283i is a portion of the inner wall of the groove 283c that is inside the boom lateral direction Yb from the bottom 283c1.

  In the facing direction D3, the size of the inner inner wall 283i is set to a height H1i, and the size of the outer inner wall 283o is set to a height H1o. The dimension (height) of the inner wall of the groove 283c in the facing direction D3 is defined as height H1. When the height H1i is different from the height H1o, the height H1 is the higher one of the height H1i and the height H1o. The dimension (height) of the protruding portion 270c in the facing direction D3 is defined as a height H2. At this time, the height H1 of the groove 283c and the like are set as follows, for example.

  [Example of height 1] The height H1 of the groove 283c is higher than the height H2 of the protrusion 270c. In this case, the protrusion 270c is less likely to come off the groove 283c than when the height H1 is equal to or less than the height H2. [Example 2 of height] One of the height H1i of the inner inner wall 283i and the height H1o of the outer inner wall 283o is higher than the other. In the example shown in FIG. 10, the height H1o is higher than the height H1i. In this case, the higher inner wall (the outer inner wall 283o) can suppress the movement of the guided portion 270 in the boom lateral direction Yb more than the lower inner wall (the inner inner wall 283i). Further, interference between an object (for example, the upper spreader sheave 63) near the lower inner wall (the inner inner wall 283i) and the guide portion 283 can be suppressed. [Example 3 of height] Note that the relationship between the height H1i and the height H1o may be variously changed according to an object around the groove 283c. For example, if there is no possibility that the peripheral portion of the inner inner wall 283i interferes with the upper spreader sheave 63, the height H1i may be the same as the height H1o.

  Although the guide portion 283 of the right attachment portion 80R (see FIG. 5) is shown in FIG. 10, it is preferable that the same guide portion 283 is provided on the left attachment portion 80L (see FIG. 5). Specifically, for example, in the case where the height H1o is higher than the height H1i in the right mounting portion 80R (see the above [Example 2 of height]), the height H1o is also the height in the left mounting portion 80L. It is preferable to set higher than H1i. In this case, regardless of whether the upper spreader 60 shown in FIG. 5 attempts to move rightward or leftward toward the boom tip side Xb1, the higher inner wall (the outer inner wall 283o) is guided. The movement of the portion 270 in the boom lateral direction Yb can be suppressed.

  Like the guide portion 283, the regulating portion 85 (see FIG. 2) may be provided with a groove portion 283c or a protruding portion 270c. In this case, the restricting portion 85 (see FIG. 2) is provided with the same groove portion 283c and protruding portion 270c as those provided on the guide portion 283. When the guide portion 283 is provided with the groove 283c or the protruding portion 270c, the regulating portion 85 (see FIG. 2) may not be provided with the groove 283c or the protruding portion 270c.

(Effect of the tenth invention)
[Configuration 10] One of the guided portion 270 and the guide portion 283 includes a protruding portion 270c having a shape protruding in a direction orthogonal to the lateral direction Y (opposing direction D3). One of the guided portion 270 and the guide portion 283 which is different from the one provided with the protruding portion 270c is provided with a groove 283c. The groove 283c has a concave shape in a direction (opposing direction D3) orthogonal to the horizontal direction Y, and the protrusion 270c can be inserted therein.

  According to the above [Configuration 10], it is possible to suppress the guided portion 270 from moving in the boom lateral direction Yb with respect to the guide portion 283. As a result, it is possible to prevent the upper spreader 60 from moving in the boom lateral direction Yb with respect to the mounting portion 80 shown in FIG.

(Effect of the eleventh invention)
[Configuration 11] In a direction (a facing direction D3) in which the bottom 283c1 of the groove 283c and the tip 270c1 of the protrusion 270c shown in FIG. 10 are opposed (opposing direction D3), the height H1 of the inner wall of the groove 283c is the height H2 of the protrusion 270c. Higher than.

  According to the above [Configuration 11], the movement of the guided portion 270 relative to the guide portion 283 in the boom lateral direction Yb can be further suppressed.

(Third embodiment)
With reference to FIG. 11, differences between the upper spreader mounting device 350 of the third embodiment and the first embodiment will be described. The upper spreader mounting device 350 according to the third embodiment includes a mounting portion frame 381.

  In the first embodiment, as shown in FIG. 3, one mounting portion frame 81 is divided into two parts, a first mounting portion frame 81a and a second mounting portion frame 81b. On the other hand, in the present embodiment, as shown in FIG. 11, one mounting portion frame 381 is configured by one (integral) component. The guide portion 83, the regulating portion 85, the rotation stopping portion 87, and the mounting portion side mounting hole 89 are included in a mounting portion frame 381 that is integrally formed. In this case, as compared with the case where at least one of the guide portion 83, the regulating portion 85, the rotation stopping portion 87, and the mounting portion side mounting hole 89 are provided on different components, the mounting portion 80 (the mounting portion frame 381) is used. Simple configuration. As a result, the attachment frame 381 may be reduced in size and weight, and may be reduced in cost. When the weight of the attachment frame 381 can be reduced, the stability of the crane 1 (see FIG. 1) can be improved. In the attachment frame 381, the inner inner wall 283i and the outer inner wall 283o shown in FIG. 7 may be integrally formed. Further, in the mounting portion frame 381 (see FIG. 11), the outer inner wall 283o may be provided, and the inner inner wall 283i may not be provided.

(Modification)
The above embodiment may be variously modified. For example, the arrangement and shape of each component may be changed. For example, the procedure of assembling and disassembling the crane 1 shown in FIG. 1 may be changed, and a part of the procedure may not be performed. For example, the number of components may be changed, and some of the components may not be provided. For example, the fixing or connection between the components may be direct or indirect. For example, what is described as a plurality of different components may be one member or part. For example, what is described as one member or part may be provided separately for a plurality of different members or parts.

  For example, only one of the boom-side mounting portion 80B and the gantry-side mounting portion 80G may be provided. For example, the configurations (shape, number of components, and the like) of the upper spreader frame 61 and the attachment frame 81 shown in FIG. 2 may be variously changed.

1 crane 20 boom (relief member)
30 Gantry (relief member)
50, 250, 350 Upper spreader mounting device 60 Upper spreader 61 Upper spreader frame 62 Upper spreader shaft 63 Upper spreader sheave 65 Upper spreader side mounting hole 70, 270 Guided portion 80 Mounting portion 83, 283 Guide portion 85, 285 Restriction portion 85a Inclination direction restricting portion 85c Arc-shaped portion 87 Rotation stopping portion 89 Mounting portion side mounting hole 90 Mounting pin 270c Projecting portion 283c Groove portion 381 Mounting portion frame (part integrally formed)
C1 Arc D1 Incline direction H1 Height (height of inner wall of groove 283c)
H2 height (height of protrusion 270c)
L1 Distance between centers O1 Arc center

Claims (11)

An upper spreader mounting device provided on an undulating member of a crane,
An upper spreader,
An attachment portion attached to the undulating member, to which the upper spreader is attached;
With
The upper spreader is
An upper spreader frame,
An upper spreader sheave rotatably mounted on the upper spreader frame;
A guided portion provided on the upper spreader frame;
An upper spreader-side mounting hole formed in the upper spreader frame, into which a mounting pin can be inserted;
With
The mounting portion,
A guide portion that can contact the guided portion, and guides the guided portion along an inclined direction that is a direction inclined with respect to an axial direction of the undulating member;
A regulating portion that can contact the guided portion, and regulates movement of the guided portion in the inclined direction;
A rotation stopper that can contact the upper spreader and regulates rotation of the upper spreader about a rotation axis in a lateral direction;
A mounting portion side mounting hole into which the mounting pin can be inserted,
With
The mounting portion side mounting hole is disposed at a position where the mounting portion side mounting hole is aligned with the upper spreader side mounting hole when the guided portion comes into contact with the guide portion and the regulating portion and the upper spreader comes into contact with the rotation stopper. ,
Upper spreader mounting device. The upper spreader mounting device according to claim 1, wherein
The regulating section regulates movement of the guided section in a direction in which the guided section is separated from the guide section when the guided section comes into contact with the regulating section,
Upper spreader mounting device. 3. The upper spreader mounting device according to claim 2, wherein
The undulating member takes a posture when the upper spreader is removed from the mounting portion, and when the guided portion comes into contact with the guide portion and the regulating portion, the regulating portion moves the guide portion into a true position of the guided portion. Placed only outside the upper area,
Upper spreader mounting device. The upper spreader mounting device according to any one of claims 1 to 3,
The guided portion is a roller attached to the upper spreader frame so as to be rotatable around a horizontal rotation axis,
Upper spreader mounting device. The upper spreader mounting device according to claim 4, wherein
The upper spreader includes an upper spreader shaft fixed to the upper spreader frame and rotatably supporting the upper spreader sheave about a rotation axis in a lateral direction,
The guided portion is disposed concentrically with the upper spreader sheave, and is rotatably attached to the upper spreader shaft.
Upper spreader mounting device. The upper spreader mounting device according to claim 4 or 5, wherein
The regulating portion includes an arc-shaped portion that can contact the guided portion,
The arc-shaped portion is arc-shaped when viewed from the lateral direction, and is formed along the outer peripheral surface of the guided portion.
Upper spreader mounting device. The upper spreader mounting device according to claim 6, wherein
The center of the arc of the arc-shaped portion is the center of the arc,
When the distance from the rotation axis of the guided portion to the upper spreader frame to the center of the upper spreader-side mounting hole is defined as a center-to-center distance,
The mounting portion side mounting hole, when viewed from the lateral direction, is disposed on an arc having the center-to-center distance as a radius around the center of the arc,
Upper spreader mounting device. An upper spreader mounting device according to any one of claims 1 to 7,
The upper spreader sheave is rotatable about a rotation axis transverse to the upper spreader frame,
The guided portion is disposed radially outward of the upper spreader sheave.
Upper spreader mounting device. An upper spreader mounting device according to any one of claims 1 to 8,
The guided portion is located at a position laterally opposed to the upper spreader frame, and is located laterally inside the upper spreader frame.
Upper spreader mounting device. An upper spreader mounting device according to any one of claims 1 to 9,
One of the guided portion and the guide portion includes a protruding portion having a shape protruding in a direction orthogonal to a lateral direction,
One of the guided portion and the guide portion different from the one provided with the protruding portion includes a groove portion,
The groove has a shape recessed in a direction orthogonal to the lateral direction, and the protrusion can be inserted therein.
Upper spreader mounting device. The upper spreader mounting device according to claim 10, wherein
In the direction in which the bottom of the groove and the tip of the protrusion face each other, the height of the inner wall of the groove is higher than the height of the protrusion.
Upper spreader mounting device.

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