JP6334458B2 - crane - Google Patents

Description

  The present invention relates to a crane.

  Conventionally, a crane in which a winch is mounted on a boom is known (see Patent Document 1). The base end side member 4A (base end boom) of the boom 4 described in Patent Document 1 includes a pair of left and right abdominal surface side main members 40F, a pair of left and right back side main members 40B, and a pair of left and right abdominal surface side main members 40F. A plurality of crosspieces 41F that connect each other, a plurality of crosspieces 41B that respectively connect a pair of left and right rear side main members 40B, and a plurality of sub-links that connect the abdominal surface side main member 40F and the back side main member 40B. Material 42.

  In the boom described in Patent Document 1, a winch (jib hoisting winch, main winding winch, and auxiliary winding winch) can be incorporated or removed from the back of the boom so that a plurality of crosspieces 41B can be taken out. Dimensions are determined. That is, a rectangular opening for carrying in / out a winch is formed on the rear surface of the boom described in Patent Document 1 by a pair of left and right rear main members 40B and a plurality of crosspieces 41B.

JP 2010-247554 A

  However, in the boom described in Patent Document 1, it is necessary to secure an opening area for incorporating the winch from the outside of the boom or taking it out from the inside of the boom on the rear surface of the boom. Diagonal materials could not be provided in the openings.

  Therefore, the boom described in Patent Document 1 has a structure that is not susceptible to “twist” because the diagonal member is not provided.

The crane according to claim 1 includes a boom including a plurality of unit booms, a base end of which is pivotally supported by a revolving body, and a winch that winds up a wire rope. In a state where another unit boom is connected to one unit boom, the unit boom is supported by the one unit boom so as to be arranged inside the other unit boom, and the boom is pivotally supported by the revolving unit. A proximal boom, a distal boom, and an intermediate boom disposed between the proximal boom and the distal boom, the proximal boom including the first split boom on the revolving structure side and the It is comprised by the some division | segmentation boom containing the 2nd division | segmentation boom by the side of an intermediate | middle boom, Said one unit boom is said 1st division | segmentation boom, and said other unit boom is said 2nd division | segmentation boom. .

  ADVANTAGE OF THE INVENTION According to this invention, in the crane which mounts a winch in a boom, the crane provided with the boom of the structure strong against a twist can be provided.

The side surface schematic diagram of the crane which concerns on 1st Embodiment. The external appearance perspective view which shows a base end boom. The disassembled perspective view which shows a base end boom. The schematic diagram which shows the connection part which connects between unit booms. The side surface schematic diagram of the crane which concerns on 2nd Embodiment. The side surface schematic diagram of the crane which concerns on the modification 1. FIG. Explanatory drawing explaining the winch attachment structure in the crane which concerns on the modification 2. As shown in FIG. The cross-sectional schematic diagram explaining the structure of the bracket in the crane which concerns on the modification 3. FIG. The schematic diagram explaining the structure of the base end boom in the crane which concerns on the modification 5. As shown in FIG. The schematic diagram explaining the structure of the 1st division | segmentation boom in the crane which concerns on the modification 7, and a 2nd division | segmentation boom.

  Hereinafter, an embodiment of a crane according to the present invention will be described with reference to the drawings. In the following, as shown in the drawing, the vertical and front / rear / right / left directions of the crane are defined based on the posture of FIG.

-First embodiment-
FIG. 1 is a schematic side view of a crane 100 according to a first embodiment of the present invention. The crane 100 includes a traveling body 101, a revolving body 103 that is turnably provided on the traveling body 101 via a swivel wheel, and a boom 104 that is pivotally supported by the revolving body 103 so that the base end portion is pivotally supported. Have.

  A driver's cab 108 is provided in the front part of the swing body 103, and a counterweight 109 is attached to the rear part of the swing body 103. The swinging body 103 is equipped with a hoisting winch 107 that is a winch for raising and lowering a boom. The boom 104 is equipped with a main winding winch 105 that is a winch for winding up the main hook and an auxiliary winding winch 106 that is a winch for winding up the auxiliary hook. Each winch is arranged such that the rotation shaft extends in the left-right direction of the crane.

  A wire rope 105 a is wound around the main winding winch 105, and a wire rope 106 a is wound around the auxiliary winding winch 106. By rotating the main winding winch 105, the wire rope 105a is wound or fed out, and the main hook 115 moves up and down. As the auxiliary winch 106 is driven to rotate, the wire rope 106a is wound or unwound, and the auxiliary hook 116 is moved up and down.

  One end of a pendant rope 107b is connected to the tip of the boom 104, and the other end of the pendant rope 107b is connected to a bridle 196. The hoisting rope 107 a wound around the hoisting winch 107 is wound around the bridle 196 and the hanger 197 a plurality of times via the top of the gantry 195. When the hoisting winch 107 is driven, the distance between the hanger 197 and the bridle 196 is changed, and the boom 104 is raised and lowered. The main winding winch 105, the auxiliary winding winch 106, and the hoisting winch 107 rotate by driving a hydraulic motor (not shown).

  The boom 104 has a lattice structure, and a plurality of unit booms (141, 142, 104B, 104C) are detachably connected to other adjacent unit booms by connecting portions 180, respectively. The boom 104 includes a proximal boom 104A (141, 142) that constitutes the proximal end (base part) of the boom 104, a distal boom 104B that constitutes the distal end of the boom 104, a proximal boom 104A, and a distal boom 104B. And an intermediate boom 104C disposed therebetween.

  In this specification, the intermediate boom 104 </ b> C refers to a boom structure that can be added, deleted, or changed according to specifications so that the overall length of the boom 104 can be adjusted. That is, instead of the intermediate boom 104C, an intermediate boom (not shown) longer than the intermediate boom 104C or a short intermediate boom (not shown) can be employed, so that the entire length of the boom 104 can be shortened. By arranging one or more other intermediate booms (not shown) between the proximal boom 104A and the intermediate boom 104C and / or between the intermediate boom 104C and the distal boom 104B, the overall length of the boom 104 is increased. can do. By omitting the intermediate boom 104C and directly connecting the distal boom 104B to the proximal boom 104A, the overall length of the boom 104 can be shortened.

  On the other hand, the base end boom 104A refers to a boom structure that is pivotally supported by the revolving structure 103 and connected to the intermediate boom 104C.

  The configuration of the proximal boom 104A will be described with reference to FIGS. FIG. 2 is an external perspective view showing the base end boom 104A, and shows a state in which the base end boom 104A is laid down so as to be substantially horizontal. FIG. 3 is an exploded perspective view showing the proximal boom 104A of FIG. The proximal boom 104A virtually has an abdominal surface, a back surface, and left and right side surfaces. In this specification, the abdominal surface of the boom refers to the surface of the boom located on the side where the hooks (115, 116) are suspended in the state where the boom is raised. That is, the belly surface of the boom refers to the surface of the boom that faces the ground contact surface in a state where the boom is laid down. On the other hand, the back surface of the boom means a surface on the opposite side to the abdomen surface of the boom. The left and right side surfaces of the boom are surfaces of the boom that are orthogonal to both the abdominal surface and the back surface, respectively.

  As shown in FIG. 2, a pair of left and right rear side main members 143B and a pair of left and right rear side main members 146B are arranged on one plane constituting the rear surface of the boom. In other words, a virtual plane that connects the pair of left and right rear-side main members 143B and a virtual plane that connects the pair of left and right rear-side main members 143B constitute the back surface of the boom. A pair of left and right abdominal surface side main members 143V and a pair of left and right abdominal surface side main members 146V are arranged on one plane constituting the abdominal surface of the boom. In other words, a virtual plane connecting the pair of left and right abdominal surface side main members 143V and a virtual plane connecting the pair of left and right abdominal surface side main members 146V constitute the abdominal surface of the boom.

  On the one plane constituting the left side surface of the boom, the left rear side main members 143B and 146B and the left abdominal side main members 143V and 146V are arranged. In other words, the virtual plane connecting the left back side main material 143B and the abdominal surface side main material 143V and the virtual plane connecting the left back side main material 146B and the abdominal surface side main material 146V constitute the left side surface of the boom. doing. On the one plane that forms the right side surface of the boom, the right rear side main members 143B and 146B and the right side ventral side main members 143V and 146V are arranged. In other words, the virtual plane that connects the right back side main material 143B and the abdominal surface side main material 143V and the virtual plane that connects the right back side main material 146B and the abdominal surface side main material 146V constitute the right side surface of the boom. doing.

  The proximal boom 104A has a lattice structure welded in a lattice shape, and is divided into two in the boom length direction. The split boom on the revolving structure side is referred to as a first split boom 141, and the split boom on the intermediate boom side is referred to as a second split boom 142. The first split boom 141 and the second split boom 142 each constitute a unit boom and are connected to each other by a connecting portion 180.

  With reference to FIG. 3, the 1st division | segmentation boom 141 and the 2nd division | segmentation boom 142 are demonstrated. In the following, as shown in FIG. 2, the direction connecting the left side surface and the right side surface of the proximal boom 104A, that is, the horizontal direction of the crane 100 and the direction parallel to the rotation axis of the winch is referred to as the boom width. It is written as direction. The direction connecting the back surface and the abdominal surface of the base end boom 104A is referred to as the boom thickness direction.

  As shown in FIG. 3, the first split boom 141 includes a pair of left and right rear side main members 143B arranged in parallel to each other and a pair of left and right abdominal surface side main members 143V arranged in parallel to each other. The back side main material 143 </ b> B and the abdominal surface side main material 143 </ b> V are also collectively referred to as a main material 143.

  The back side main material 143B and the abdominal surface side main material 143V are arranged so that the distance between each other in the boom thickness direction becomes shorter toward the base end side, and the base end of the back side main material 143B and the abdominal surface side main material 143V. Are connected to each other by a coupling bracket 131. The coupling bracket 131 is provided with a pin hole, and the coupling bracket 131 is rotatably connected to the revolving structure 103 by a pin (not shown).

  The pair of left and right rear side main members 143B are connected by three rear side crosspieces 144B extending in the boom width direction. The three back-side crosspieces 144B are a crosspiece on the connecting portion side that is arranged in the vicinity of the connecting portion 180, a crosspiece on the base end side that is arranged in the vicinity of the coupling bracket 131, and a crosspiece that is arranged in the vicinity of the center. These are arranged so as to be parallel to each other.

  The pair of left and right ventral surface side main members 143V are connected by three ventral surface side crosspieces 144V extending in the boom width direction. The three belly-side crosspieces 144V are a connecting-part-side crosspiece arranged near the connecting part 180, a base-end side crosspiece arranged near the coupling bracket 131, and a cross-piece arranged near the center. These are arranged so as to be parallel to each other.

  The left back side main material 143B and the left ventral side main material 143V are connected by two sub-materials 144L extending in the boom thickness direction. The right-side back side main material 143B and the right-side ventral side main material 143V are connected by two sub-materials 144L extending in the boom thickness direction.

  A plurality of base end side diagonal members 145M are bridged in a zigzag manner between the rear side beam member 144B near the center and the abdominal surface side beam member 144V near the center.

  A plurality of back side diagonal members 145B are bridged in a zigzag manner between the pair of left and right back side main members 143B. A plurality of abdominal surface side diagonal members 145V are bridged in a zigzag manner on the pair of left and right abdominal surface side main members 143V. A plurality of side-surface diagonal members 145S are bridged in a zigzag manner between the left back side main material 143B and the left ventral side main material 143V. A plurality of side-surface diagonal members 145S are bridged in a zigzag manner between the right-side back-side main member 143B and the right-side ventral-side main member 143V. The back side diagonal 145B, the abdominal side diagonal 145V, the side side diagonal 145S, and the base end side diagonal 145M are collectively referred to as the diagonal 145.

  A pair of left and right brackets 161 are bridged and welded between the rear-side beam member 144B on the base end side and the rear-side beam member 144B near the center. The auxiliary winch 106 includes a drum body (rotating body) 160, a pair of left and right drum support plates 162 that rotatably support the drum body 160 via a rotation shaft, and a hydraulic motor 163 that rotationally drives the drum body 160. I have.

  The pair of left and right drum support plates 162 are each formed in a V shape, and one end portions of the pair of left and right drum support plates 162 are connected by a connecting plate 165 to be integrated. Both ends of the pair of left and right drum support plates 162 are coupled to the bracket 161 with pins. As a result, the auxiliary winding winch 106 is supported on the rear surface of the boom and is disposed outside the boom.

  A pair of left and right brackets 151 are bridged and welded between the back-side beam member 144B on the connecting portion side and the belly surface-side beam member 144V on the connecting portion side. The main winding winch 105 has the same configuration as the auxiliary winding winch 106, and includes a drum main body (rotating body) 150 and a pair of left and right drum support plates 152 that rotatably support the drum main body 150 via a rotation shaft. And a hydraulic motor 153 that rotationally drives the drum body 150.

  The pair of left and right drum support plates 152 are each formed in a V shape, and one end portions of the pair of left and right drum support plates 152 are connected by a connecting plate 155 to be integrated. Both ends of the pair of left and right drum support plates 152 are coupled to the bracket 151 with pins.

  As described above, the main winding winch 105 is provided with the bracket 151 and the back-side beam member 144B and the abdominal surface-side beam member 144V of the first divided boom 141 disposed at the boundary between the first divided boom 141 and the second divided boom 142. The drum body 150 is supported via the drum support plate 152, and the entire drum body 150 is disposed outside the first split boom 141.

  The drum body 150 is provided so as to protrude from the first divided boom 141 toward the second divided boom 142 side, and the back-side beam member 144B, the ventral surface-side beam member 144V on the connecting portion side in the first divided boom 141, and the left and right sides By adopting a configuration in which the entire drum body 150 is disposed closer to the second divided boom 142 than the opening surfaces formed by the pair of sub-materials 144L, the winch can be easily attached and detached.

  An example of the procedure for attaching the main winding winch 105 to the first split boom 141 is as follows. The 1st division | segmentation boom 141 is laid down so that it may become substantially horizontal. The main winch 105 is suspended by an auxiliary crane or the like, positioned so that the pin hole on the upper side of the bracket 151 and the pin hole of the drum support plate 152 are aligned, and coupled with pins. The main winding winch 105 is rotated around the pin as a center of rotation, and the pin hole on the lower side of the bracket 151 and the pin hole of the drum support plate 152 are positioned so as to be aligned with each other and coupled with the pin. As a result, the main winding winch 105 is attached to the first split boom 141. The main winding winch 105 may be removed in the reverse order of assembly. Since the main winding winch 105 is provided so as to protrude from the first split boom 141 toward the second split boom 142, the main winding winch 105 can be easily attached and detached. Therefore, according to the present embodiment, assembling / disassembling workability is better than the work of carrying in and attaching the main winding winch 105 into the boom using a jig such as a rail.

  The second divided boom 142 includes a pair of left and right rear side main members 146B arranged in parallel to each other and a pair of left and right abdominal surface side main members 146V arranged in parallel to each other. The back side main material 146 </ b> B and the abdominal surface side main material 146 </ b> V are also collectively referred to as a main material 146.

  The back side main material 146B and the abdominal surface side main material 146V are arranged such that the distance between each other in the boom thickness direction becomes shorter toward the base end side.

  The pair of left and right back side main members 146B are connected to each other at both ends by back side crosspieces 147B extending in the boom width direction. The two back-side crosspieces 147B are arranged so as to be parallel to each other.

  The pair of left and right abdominal surface side main members 146V are connected to each other at both end portions by an abdominal surface side crosspiece 147V extending in the boom width direction. The two belly side bars 147V are arranged so as to be parallel to each other.

  The left back side main member 146B and the left ventral side main member 146V are connected by two sub members 147L extending in the boom thickness direction. The right back side main member 146B and the right ventral side main member 146V are connected by two sub members 147L extending in the boom thickness direction. Two sub-materials 147L are provided in the vicinity of the connecting portion 180 with the intermediate boom 104C and in the vicinity of the connecting portion 180 with the first divided boom 141, respectively.

  Between the pair of left and right back side main members 146B, a plurality of back side diagonal members 148B are bridged in a zigzag shape. A plurality of abdominal surface side diagonal members 148V are bridged in a zigzag manner on the pair of left and right abdominal surface side main members 146V. A plurality of side surface diagonal members 148S are bridged in a zigzag manner between the left back side main member 146B and the left ventral side main member 146V. A plurality of side surface diagonal members 148S are bridged in a zigzag manner between the right back side main member 146B and the right ventral side main member 146V.

  The rectangular opening 14a defined by the back-side beam member 147B, the abdominal surface-side beam member 147V, and the pair of left and right auxiliary members 147L provided in the vicinity of the connecting portion 180 of the second divided boom 142 with the intermediate boom 104C is diagonally formed. Further, a front end side diagonal material 148M is provided. On the other hand, the rectangular shape defined by the back-side beam member 147B, the abdominal surface-side beam member 147V, and the pair of left and right auxiliary members 147L provided in the vicinity of the connecting portion 180 of the second divided boom 142 with the first divided boom 141. Diagonal material is not provided in the opening 14b. The back side diagonal material 148B, the abdominal surface side diagonal material 148V, the side surface side diagonal material 148S, and the front end side diagonal material 148M are also collectively referred to as the diagonal material 148.

  A guide device 170 for guiding the wire rope 105a is disposed on the rear face of the second divided boom 142. The guide device 170 includes a guide sheave 171 that guides the wire rope 105a and a support shaft 172 that rotatably supports the guide sheave 171. The support shaft 172 is bridged and welded to the pair of left and right rear side main members 146B so as to extend in the boom width direction.

  FIG. 4 is a schematic diagram showing a connecting portion 180 that connects the unit booms. Each unit boom (141, 142, 104B, 104C) is connected to an adjacent unit boom by a connecting pin 190 at the end. Since the structure of the connection part 180 of each unit boom is substantially the same, the connection part 180 which connects the 1st division | segmentation boom 141 and the 2nd division | segmentation boom 142 as a representative is demonstrated. In FIG. 4, illustration of the bracket 151 and the main winding winch 105 is omitted.

  As shown in FIG. 4A, each of the four corners of the end of the first split boom 141 on the second split boom 142 side, that is, each of the ends of the four main members 143 constituting the first split boom 141, respectively. Is provided with a bifurcated connecting portion 182 having a bifurcated connecting plate. Each of the four corners of the end of the second split boom 142 on the first split boom 141 side, that is, each of the ends of the four main members 146 constituting the second split boom 142, is bifurcated. A connection piece 186 inserted between a pair of connection plates constituting the connection portion 182 is provided.

  As shown in FIGS. 4A and 4B, each of the bifurcated connecting portion 182 and the connecting piece 186 is provided with a circular pin insertion hole 185 through which the connecting pin 190 is inserted. The first split boom 141 and the second split boom 142 are connected by inserting the connecting piece 186 into the bifurcated connecting portion 182 and inserting the connecting pin 190 through the pin insertion hole 185. Similarly, the second split boom 142 and the intermediate boom 104C are connected, and the intermediate boom 104C and the tip boom 104B are connected.

  The connecting pin 190 has a cylindrical portion 191, a locking portion 192 provided at one end of the cylindrical portion 191, and a tapered portion 193 provided at the other end of the cylindrical portion 191. The cylindrical portion 191 is formed to have a slightly smaller diameter than the pin insertion hole 185 provided in the bifurcated connecting portion 182 and the connecting piece 186. Since the connecting pin 190 is provided with a tapered portion 193 that is tapered from the cylindrical portion 191, the insertion property into the pin insertion hole 185 is improved. The locking part 192 is a disk-shaped part having a diameter larger than that of the pin insertion hole 185. A through hole 194 through which a stop pin (pine needle pin) 199 is inserted is formed in the vicinity of the tapered portion 193 of the cylindrical portion 191.

  As shown in FIG. 4B, the connecting pin 190 is inserted into the pin insertion hole 185 provided in the bifurcated connecting portion 182 and the connecting piece 186, and the stop pin 199 is inserted into the through hole 194, whereby the connecting pin 190 is inserted. Is prevented from falling off the pin insertion hole 185 by the locking portion 192 and the set pin 199, and is held at a predetermined position.

  When the 1st division | segmentation boom 141 and the 2nd division | segmentation boom 142 are connected by the connection part 180, 104 A of proximal end booms will be comprised (refer FIG. 2). An example of a procedure for attaching the second split boom 142 to the first split boom 141 is as follows. The 1st division | segmentation boom 141 is laid down so that it may become substantially horizontal. The second divided boom 142 is suspended by an auxiliary crane or the like and is disposed in front of the first divided boom 141. The lifted second divided boom 142 is brought close to the first divided boom 141. The main winding winch 105 is inserted into the second divided boom 142 from the rectangular opening 14 b of the second divided boom 142. The connecting piece 186 is inserted into the bifurcated connecting portion 182, the positions of the respective pin holes are aligned, and the connecting pins 190 are coupled.

  When the second split boom 142 is connected to the first split boom 141, the main winding winch 105 supported by the first split boom 141 is disposed inside the second split boom 142. In the present specification, the inner side of the second divided boom 142 is a space surrounded by the rear surface, the abdominal surface, the left and right side surfaces of the boom, the virtual plane including the rectangular opening 14a, and the virtual plane including the rectangular opening 14b. Means inside. In other words, the inside of the second split boom 142 is the four main members 146 and a connecting member that connects the adjacent main members 146 at both ends of the main member 146 (back-side bar member 147B, belly surface). The inside of the space surrounded by the side bars 147V and the auxiliary material 147L).

According to the first embodiment described above, the following operational effects are obtained.
(1) The crane 100 is composed of a plurality of unit booms, and a boom 104 whose base end is pivotally supported by the revolving structure 103 and a main winding winch 105 that winds a wire rope (winding rope). It has. The main winding winch 105 is arranged inside the second split boom 142 in a state where the second split boom 142, which is another unit boom, is connected to the first split boom 141, which is one unit boom. Further, it is supported by the first split boom 141. In the boom described in Patent Document 1, it is necessary to provide a large opening for carrying a winch from the outside of the boom to the inside of the boom on the rear surface of the boom, but according to the present embodiment, the main winding winch. There is no need to provide a large opening on the back of the boom for carrying 105. Accordingly, in the present embodiment, since a plurality of diagonal members 145, 148 can be provided on the base end boom 104A, a crane equipped with a boom having a structure resistant to torsion is provided in a crane in which a winch is mounted in the boom. can do. In addition, since the diagonal members 145 and 148 can be provided, it is possible to reduce the weight of each component member (main material, crosspiece material, diagonal material, secondary material) of the boom.

(2) The main winding winch 105 is supported by the first divided boom 141 such that the entire drum body 150 constituting the main winding winch 105 is disposed outside the first divided boom 141. That is, the entire drum main body 150 of the main winding winch 105 is defined by the rear side beam member 144B, the abdominal surface side beam member 144V, and the pair of left and right auxiliary members 144L provided in the vicinity of the connecting portion 180 of the first split boom 141. It is located closer to the second divided boom 142 than the rectangular opening surface. Thereby, as compared with the case where a part or all of the drum main body 150 is disposed inside the first divided boom 141, the assembly / disassembly workability of the winch with respect to the boom is good.

(3) The main winding winch 105 includes a rear-side beam member 144B and an abdominal surface-side beam member 144V that are connecting members of the first divided boom 141 disposed at the boundary between the first divided boom 141 and the second divided boom 142. Are connected via a bracket 151 which is a support member. Thereby, the main winding winch 105 can be attached to the first split boom 141 with a simple configuration as compared with the case where the main material 143 and the diagonal material 145 are provided with brackets.

-Second Embodiment-
With reference to FIG. 5, the crane 200 which concerns on 2nd Embodiment is demonstrated. In the figure, the same reference numerals are assigned to the same or corresponding parts as those in the first embodiment, and the differences will be mainly described. In the first embodiment, the auxiliary winding winch 106 is attached to the back surface of the proximal boom 104A (see FIG. 1). On the other hand, in the second embodiment, as shown in FIG. 5, the auxiliary winding winch 106 is disposed inside the intermediate boom 104C.

  In the second embodiment, as in the first embodiment, the main winding winch 105 includes a first divided boom 141 that is one unit boom and a second divided boom 142 that is another unit boom. In this state, the first divided boom 141 is supported by the first divided boom 141 so as to be disposed inside the second divided boom 142 which is another unit boom.

  In the second embodiment, the auxiliary winding winch 106 is attached in the same manner as the main winding winch 105. That is, the auxiliary winch 106 is disposed inside the intermediate boom 104C, which is another unit boom, in a state where the intermediate boom 104C, which is another unit boom, is connected to the second divided boom 142, which is one unit boom. Thus, the second divided boom 142, which is one unit boom, is supported.

  According to the second embodiment, in addition to the same effects as the first embodiment, the proximal boom 104A is compared to the case where the auxiliary winding winch 106 is disposed outside the proximal boom 104A. Can be shortened, which is advantageous for restricting the height of transportation.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification 1)
As shown in FIG. 6, the present invention may be applied to a luffing crane 300. In the example shown in FIG. 6, a jib hoisting winch 310 for raising and lowering the jib 302 is disposed on the back surface of the first split boom 141. In the first modification, the main winding winch 105 and the auxiliary winding winch 106 are arranged in the same manner as in the second embodiment. Thus, the number of winches and the arrangement of each winch are not limited to the above-described embodiments, and can be variously changed according to the specifications of the crane. Moreover, you may apply this invention to a tower crane. The present invention may be applied to a fixed crane without being limited to a mobile crane.

(Modification 2)
The winch support structure is not limited to the above-described embodiment. For example, as shown in FIG. 7, the main winding winch 105 may be attached to the first split boom 141 via an L-shaped bracket 451. The L-shaped bracket 451 is bridged between the back-side beam member 144B and the abdomen-side beam member 144V on the connecting portion side of the first split boom 141, and is welded to the base 451b and the vicinity of the lower end of the base 451b. And a mounting portion 451a extending outward in the boom length direction. The attachment portion 451a is provided with a pair of pin holes, and both end portions of the drum support plate 152 are coupled to the attachment portion 451a with pins. By adopting such a configuration, it is possible to improve the efficiency of assembling / disassembling workability as compared with the embodiment described above.

(Modification 3)
In the above-described embodiment, the example in which the pair of left and right brackets 151 are each composed of one flat plate member has been described, but the present invention is not limited to this. For example, you may comprise a bracket with two flat members. In FIG. 3, one bracket 151 is disposed on the left side and one bracket 151 is disposed on the right side. Instead, two brackets 151 are disposed on the left side and on the right side. Two brackets 151 may be provided. In this case, the drum support plate 152 is inserted between the two brackets 151 and coupled with pins. Further, as shown in FIG. 8, two brackets 151 are not provided, and a plate 551 having a flat plate bent in an L-shape is welded to one bracket 151, and only a portion where pins are coupled is configured with two plates. It may be made to become.

(Modification 4)
In the first embodiment, the proximal boom 104A is divided into two in the boom length direction, the main divided winch 105 is supported by the first divided boom 141 on the revolving structure 103 side, and the second divided on the intermediate boom 104C side. Although the example which arrange | positions the main winding winch 105 inside the boom 142 was demonstrated, this invention is not limited to this.

  For example, in the crane 100 according to the first embodiment, the base-end boom 104A is not divided, and the main winding winch 105 is disposed at the boundary between the base-end boom 104A and the intermediate boom 104C. It is also possible to support the back-side beam member 147B and the abdominal surface-side beam member 147V, which are constituent members of 104A, via a support member similar to the bracket 151 shown in FIG.

  In the modified example 4, since the proximal boom 104A is not divided, the assembling / disassembling performance may be better than that of the first embodiment. In the modified example 4, it is necessary to provide the guide device 170 on each intermediate boom that is changed according to the specifications. However, in the first embodiment described above, the guide device 170 is provided only on the second divided boom 142. There is an advantage that it is not necessary to provide the guide device 170 in each intermediate boom that is changed according to the specification.

(Modification 5)
In the above-described embodiment, the example in which the proximal boom 104A is divided into two in the boom length direction has been described, but the present invention is not limited to this. The proximal boom 104A may be divided into three or more parts. For example, in an ultra-large crane, as shown in FIG. 9, the base end boom 104A is divided into three in the boom length direction, the base end side first split boom 941, the tip end side third split boom 943, A crane 100 in which a base boom 104A is constituted by the second split boom 942 between the first split boom 941 and the third split boom 943, and the main winding winch 105 and the auxiliary winding winch 106 are arranged in the base end boom. Can be configured. In this case, the main winding winch 105 is supported by the first split boom 941 so that the main winding winch 105 is located in the second split boom 942 at the boundary between the first split boom 941 and the second split boom 942. Furthermore, the auxiliary winding winch 106 is supported by the second divided boom 942 so that the auxiliary winding winch 106 is positioned in the third divided boom 943 at the boundary between the second divided boom 942 and the third divided boom 943.

(Modification 6)
In the first embodiment, the drum body 150 is provided so as to protrude from the first divided boom 141 toward the second divided boom 142, and the entire drum body 150 is disposed outside the first divided boom 141. Although the example which did so was demonstrated, this invention is not limited to this. A part of the drum main body 150 may be located inside the first split boom 141.

(Modification 7)
In the first embodiment, the example in which the main winding winch 105 is supported by the first split boom 141 so as to be disposed inside the second split boom 142 has been described, but the present invention is limited to this. Not. In the base end boom 104 </ b> A divided into the first divided boom 141 and the second divided boom 142, the second winding so that the main winding winch 105 is disposed inside the first divided boom 141, as shown in FIG. 10. A configuration may also be adopted in which the main winding winch 105 is supported by the split boom 142.

  As long as the characteristics of the present invention are not impaired, the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .

DESCRIPTION OF SYMBOLS 100 Crane, 103 Revolving body, 104 boom, 104A Base end boom, 104B End boom (unit boom), 104C Intermediate boom (unit boom), 105 Main winding winch (winch), 105a Wire rope, 106 Supplementary winding winch (winch) , 106a Wire rope, 131 Coupling bracket (connection member), 141 First split boom (unit boom), 142 Second split boom (unit boom), 143 Main material, 144B Rear side bar material (connection member), 144L Secondary material (Connecting member) 144V Ventral side crosspiece (connecting member), 146 Main material, 147B Rear side crosspiece (connecting member), 147L Secondary material (connecting member), 147V Ventral side crosspiece (connecting member), 150 Drum body 151 Bracket (supporting member), 160 drum body, 200 crane, 00 luffing crane (crane), 451 bracket (support member)

Claims (5)

A boom composed of a plurality of unit booms, the base end of which is pivotally supported by the swivel body;
Comprising a winch for winding a wire rope, a,
The winch is supported by the one unit boom so that the winch is disposed inside the other unit boom in a state where the other unit boom is connected to the one unit boom .
The boom has a proximal boom that is pivotally supported by the revolving structure, a distal boom, and an intermediate boom that is disposed between the proximal boom and the distal boom.
The proximal boom is composed of a plurality of divided booms including a first divided boom on the revolving structure side and a second divided boom on the intermediate boom side,
The one unit boom is the first divided boom,
The other unit boom is a crane that is the second divided boom . The crane according to claim 1,
The back-side main material and the abdominal surface-side main material of the second split boom are arranged such that the distance between the back-side main material and the abdominal surface-side main material decreases in the boom thickness direction connecting the back surface and the abdominal surface. Crane being deployed . The crane according to claim 1 or 2,
The winch is a crane supported by the one unit boom such that the entire drum body constituting the winch is disposed outside the one unit boom . The crane according to any one of claims 1 to 3,
The winch is supported by a component member of the one unit boom disposed at a boundary portion between the one unit boom and the other unit boom via a support member. A boom composed of a plurality of unit booms, the base end of which is pivotally supported by the swivel body;
A winch for winding the wire rope, and
The winch is supported by the one unit boom so that the winch is disposed inside the other unit boom in a state where the other unit boom is connected to the one unit boom.
The other unit boom includes four main members and a connecting member that connects the main members adjacent to each other at both ends of the main member,
A crane in which the winch is disposed in a space surrounded by the main member and the connecting member in the other boom in a state where the other unit boom is connected to the one unit boom .

Images