JP6531505B2 - Telescopic boom mounting structure - Google Patents

Telescopic boom mounting structure Download PDF

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Publication number
JP6531505B2
JP6531505B2 JP2015118617A JP2015118617A JP6531505B2 JP 6531505 B2 JP6531505 B2 JP 6531505B2 JP 2015118617 A JP2015118617 A JP 2015118617A JP 2015118617 A JP2015118617 A JP 2015118617A JP 6531505 B2 JP6531505 B2 JP 6531505B2
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Prior art keywords
boom
base
bracket
telescopic boom
width
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Japanese (ja)
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JP2017001840A (en
Inventor
正裕 石井
石井  正裕
征男 樫原
征男 樫原
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株式会社タダノ
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/82Luffing gear

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a mounting structure of a telescopic boom for mounting the telescopic boom on a pivot post in an undulating manner.

  Conventionally, a telescopic boom mounting structure has been known which mounts a telescopic boom in which a plurality of intermediate booms are nested inside the base boom to be telescopically extendable to a swing post pivotably provided on a base of a crane. (See Patent Document 1).

  The mounting structure of the telescopic boom is provided with a pair of holding plate parts opposed to the turning post, and the rear part of the base boom of the telescopic boom is mounted between the holding plate parts via a shaft member, and the base boom is made by this shaft member. It can be undulated with respect to the pivot post.

Unexamined-Japanese-Patent No. 2001-97673

  By the way, in the telescopic boom, the gap between the side wall portion of the base boom and the side wall portion of the intermediate boom is set narrow, and the base boom etc. is distorted by the heat of welding etc. in the side wall portion. There is a possibility that the side wall of the base boom and the side wall of the base boom may interfere with each other. In order to solve this problem, the width of the base boom may be increased. However, since the width of the base boom is set to the width between the holding plates of the pivot post, the width of the base boom should be increased. In this case, it is necessary to change the width between the pair of holding plate portions of the pivot post to the pivot post.

  An object of the present invention is to provide a telescopic boom mounting structure capable of preventing interference between a base boom and an intermediate boom without changing an existing swing post.

The invention according to claim 1 is a mounting structure of a telescopic boom for holding a rear portion of a base boom of a telescopic boom of a working machine by a bracket and attaching the base boom to the pivot post so as to be able to move up and down with the bracket.
The bracket has a pair of abutment plates joined to both side walls at the rear of the base boom,
Each of the contact plate portions has a base piece which is movably held between a pair of opposed holding portions of the pivot post,
The width of the bracket other than the base piece is set larger than the width of the bracket in the base piece.

  According to the present invention, the width of the base boom can be increased without changing the swing post, and interference between the base boom and the intermediate boom can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is the side view which showed the external appearance of the truck crane to which the attachment structure of the telescopic boom which concerns on this invention is applied. It is the perspective view which showed the bracket and base boom of the attachment structure of the expansion-contraction boom which concerns on this invention. It is the perspective view which showed the attachment structure of the telescopic boom which concerns on this invention. It is the perspective view which showed the boom structure of 2nd Example.

  Hereinafter, an embodiment which is an embodiment of a mounting structure of a telescopic boom according to the present invention will be described based on the drawings.

[First embodiment]
FIG. 1 shows a truck crane (crane) 10 as a working machine to which a telescopic boom mounting structure is applied.

The truck crane 10 includes a main frame 14 extending in the front-rear direction and provided with front wheels 11 and first and second rear wheels 12 and 13, a pivot post 20 pivotably provided on the main frame 14, and A telescopic boom 100 provided on the upper part of the swivel post 20, a hoisting cylinder 15 for hoisting the telescopic boom 100, and a position (relative to the front and rear direction) of the swivel post on both sides of the main frame 14 It has a pair of outrigger devices 30 (only one is shown), a cabin 16 provided on the main frame 14 on the front side of the swing post 20, and a loading platform 17 provided on the rear side of the swing post 20, etc. .
[Swirl Post]
The swing post 20 has a pair of opposed holding plate parts (holding parts) 21 (only one of which is shown) holding the telescopic boom 100 so as to be able to move up and down. In addition, a winch and a reduction gear (not shown) are disposed in the turning post 20, and a wire (not shown) for suspending the hanging load is wound up and drawn out.
Telescopic Boom
The telescopic boom 100 includes a base boom 110, middle booms 111 and 112, and a tip boom 113, and in this order, the telescopic boom 100 is assembled in a telescoping manner from the outside to the inside in the base boom 110. The telescopic boom 100 is configured to be telescopic by a telescopic cylinder (not shown).

  2 and 2A show the mounting structure of the telescopic boom 100 for mounting the telescopic boom 100 to the pivot post.

As shown in FIGS. 2 and 2A, a bracket 120 is attached to the rear of the base boom 110, and the base boom 110 is mounted in an undulating manner to the pivot post 20 via the bracket 120.
[bracket]
As shown in FIG. 2, the bracket 120 is provided with a pair of contact plates 130 and 130 that are in contact with the side walls 110A and 110B of the base boom 110, and a rear upper portion of the pair of contact plates 130 and 130. And an end plate 140 which connects the contact plate portions 130.

  Each contact plate portion 130 is provided at a rear portion of a welding region 131 including a welding region welded to the side wall 110A of the base boom 110 and at the rear of the welding region 131 as shown in FIG. And a base piece 132 projecting rearward from the rear end position of The boundary between the base piece 132 and the welding area portion 131 is a step portion 133.

  The width W2 between the base pieces 132 and 132 of the bracket 120 is set to be smaller than the width W1 between the welding regions 131 and 131. That is, the width W1 between the contact plate portions 130 and 130 of the portion other than the base piece 132 is set larger than the width W2 between the base pieces 132 and 132. That is, the width W1 of the bracket other than the base piece 132 is set larger than the width W2 of the bracket 120 in the base piece 132.

  The welding area portion 131 of the bracket 120 has a V-shaped protruding piece 131A protruding downward from the lower surface 110C of the base boom 110. An axial hole 129 is formed at the lowermost portion of the projecting piece 131A, and reinforcing flanges 127 and 128 are formed along ridge lines (edges) 122A and 122B of the projecting piece 131A. Further, an opening 126 for securing welding strength is formed at the center of the welding area 131.

  In the base piece 132, as shown in FIG. 2A, a shaft hole 124 for mounting the telescopic boom 100 up and down between the holding plate portions 21 of the turning post 20 and one end of a telescopic cylinder of the telescopic boom 100 are fixed. And an axial hole 125 for mounting an axial member (not shown).

Since the contact plate portion 130 joined to the side wall portion 110B of the base boom 110 also has the same configuration as that described above, the description thereof is omitted.
[Installation of telescopic boom]
The welding regions 131 and 131 of the bracket 120 are welded to the rear side wall portions 110A and 110B of the base boom 110 of the telescopic boom 100, and the bracket 120 is attached to the rear of the base boom 110 as shown in FIG.

  Thereafter, as shown in FIG. 2A, the base pieces 132, 132 of the bracket 120 are inserted between the holding plate portions 21, 21 of the pivot post 20, and the pivot holes 124, 124 of the base pieces 132, 132 are pivoted posts. The 20 shaft members 150 are inserted to attach the bracket 120 to the pivot post 20.

  Further, in order to connect one end of the relief cylinder 15 (see FIG. 1) to the bracket 120, the shaft hole 129 of one welding area 131 of the bracket 120 and the axis of a projecting piece (not shown) of the other welding area 131 Attach the shaft member (not shown) to the hole. As a result, the telescopic boom 100 is undulated about the shaft member 150 by the telescopic operation of the relief cylinder 15.

  By the way, as shown in FIG. 2, the width W1 between the contact plate portions 130 and 130 of the portion other than the base piece 132 is set larger than the width W2 between the base pieces 132 and 132, The lateral width can be increased, and the gap between the side wall portions 110A and 110B of the base boom 110 and the side wall portion (not shown) of the intermediate boom 111 (see FIG. 1) can be increased. For this reason, even if distortion due to heat such as welding occurs in the side walls of the base boom 110 and the intermediate boom 111, interference between the base boom 110 and the intermediate boom 111 can be prevented. For this reason, it is not necessary to perform strict distortion removal processing.

  Moreover, by setting the width W2 to the same as the conventional width, the existing one can be used without changing the pivot post 20, and furthermore, the existing shaft member 150 for relief can be used. . Further, since the lateral width of the base boom 110 can be increased, the lateral rigidity of the telescopic boom 100 can be enhanced. In addition, since the lateral width of the base boom 110 can be increased, the multistage boom can be easily configured.

In addition, although each contact | abutting board part 130 of the bracket 120 is formed by press forming from the board | plate material of 1 sheet, you may make it weld and form 2 board members.
Second Embodiment
FIG. 3 shows the bracket 200 of the second embodiment. The bracket 200 is disposed between a pair of contact plate portions 230 and 230 joined to the side wall portions 110A and 110B of the base boom 110, and between the rear upper portion and the rear end of the pair of contact plate portions 230 and 230. And an end plate 240 for connecting the contact plate portions 230.

  Each contact plate portion 230 is provided at the rear of a welding area (abutment area) 231 welded to the side wall 110A of the base boom 110 and both welding areas 231 and is located rearward of the rear end position of the base boom 110 And a base piece 232 projecting to the bottom.

  As the boundary 233 between the base piece 232 and the welding area 231 goes from the base piece 232 to the welding area 231, the width W3 between the contact plates 230 and 230 of the boundary 233 gradually increases. It is set to.

  That is, the bracket 200 eliminates the step portion 133 of the bracket 120 shown in FIG. 2. By eliminating the step portion 133, it is possible to eliminate stress concentration generated in the step portion 133.

  Further, the width W1 between the welding area portions 231, 231 of the bracket 200 is set to be larger than the width W2 between the base pieces 232, 232 as in the first embodiment.

  In each of the above embodiments, the width W1 between the welding area portions 131, 131, 231, 231 of the brackets 120, 200 is set larger than the width W 2 between the base pieces 132, 132, 232, 232. If the width W2 between the base pieces 132, 132, 232, 232 is set smaller than the width W1 between the welding regions 131, 131, 231, 231, the pivot post 20 can be maintained while maintaining the lateral rigidity of the telescopic boom 100. Can be reduced in size and weight.

  Further, although the above embodiment has described the case where the telescopic boom mounting structure is applied to the telescopic boom 100 of the truck crane, the present invention is not limited to this, and is applied to the telescopic boom of another working machine such as a high place work vehicle It is also good.

  The above embodiments are not limited to those described above. Also, the present invention can be modified in design without departing from the invention.

10 truck crane (working machine)
20 Pivot post 21 Holding plate part (holding part)
100 Telescopic boom 110 Base boom 110A Side wall 110B Side wall 111 Intermediate boom
Reference Signs List 120 bracket 130 contact plate portion 131 welding region portion 132 base piece 200 bracket 230 contact plate portion 231 welding region portion (contact portion)
232 base piece

Claims (2)

  1. A mounting structure of a telescopic boom for holding a rear portion of a base boom of a telescopic boom of a working machine by a bracket and attaching the base boom to a pivot post so as to be able to move up and down with the bracket.
    The bracket has a pair of abutment plates joined to both side walls at the rear of the base boom,
    Each of the contact plate portions has a base piece which is movably held between a pair of opposed holding portions of the pivot post,
    A mounting structure of a telescopic boom, wherein a width of a bracket other than the base piece is set larger than a width of a bracket in the base piece.
  2. Each of the contact plate portions includes a contact portion that is in contact with a side wall portion of the base boom, and the base piece provided at the rear of the contact portion.
    2. The telescopic boom according to claim 1, wherein the width of the bracket at the boundary between the base piece and the contact part is set so as to gradually increase from the base piece to the contact part. Mounting structure.

JP2015118617A 2015-06-11 2015-06-11 Telescopic boom mounting structure Active JP6531505B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015118617A JP6531505B2 (en) 2015-06-11 2015-06-11 Telescopic boom mounting structure

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015118617A JP6531505B2 (en) 2015-06-11 2015-06-11 Telescopic boom mounting structure
CN201680029045.9A CN107735351B (en) 2015-06-11 2016-06-06 Mounting structure of telescopic crane boom
PCT/JP2016/066762 WO2016199721A1 (en) 2015-06-11 2016-06-06 Telescopic boom mounting structure
KR1020177032309A KR101942213B1 (en) 2015-06-11 2016-06-06 Mounting structure of new boom

Publications (2)

Publication Number Publication Date
JP2017001840A JP2017001840A (en) 2017-01-05
JP6531505B2 true JP6531505B2 (en) 2019-06-19

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ID=57503384

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Application Number Title Priority Date Filing Date
JP2015118617A Active JP6531505B2 (en) 2015-06-11 2015-06-11 Telescopic boom mounting structure

Country Status (4)

Country Link
JP (1) JP6531505B2 (en)
KR (1) KR101942213B1 (en)
CN (1) CN107735351B (en)
WO (1) WO2016199721A1 (en)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5158189A (en) * 1991-12-12 1992-10-27 Watson Brothers Industries, Inc. Boom support system
US5515654A (en) * 1994-11-02 1996-05-14 Anderson; Edward E. Telescopic boom apparatus
JP3124481B2 (en) * 1996-01-12 2001-01-15 日立建機株式会社 Construction steel demolition machine
JPH09249397A (en) * 1996-03-15 1997-09-22 Aichi Corp Expandable boom
JP2001097673A (en) 1999-09-28 2001-04-10 Tadano Ltd Method for loading and unloading heavy weight to rear region of loading space of truck with crane
JP4943645B2 (en) * 2004-11-12 2012-05-30 株式会社タダノ Boom length detector for telescopic boom
JP5037050B2 (en) * 2006-07-20 2012-09-26 株式会社タダノ Telescopic boom in a working machine with a boom
KR20130124168A (en) * 2010-08-26 2013-11-13 히다치 겡키 가부시키 가이샤 Construction machine
JP5725777B2 (en) * 2010-09-17 2015-05-27 株式会社タダノ Cord reel mounting structure
US9376292B2 (en) * 2010-12-17 2016-06-28 Tadano Faun Gmbh Mobile telescopic crane
US9315966B2 (en) * 2011-05-19 2016-04-19 Hitachi Construction Machinery Co., Ltd. Arm for construction machine with upper ends of rear plate protruding upward
JP2013108247A (en) * 2011-11-18 2013-06-06 Hitachi Constr Mach Co Ltd Apparatus for connecting/disconnecting upper and lower connecting pins of work machine and method for assembling/disassembling the work machine
EP2712836B1 (en) * 2012-09-28 2015-06-03 Mesera Cranes Finland Oy A telescopic crane and a telescopic boom arrangement of a telescopic crane

Also Published As

Publication number Publication date
KR20170134714A (en) 2017-12-06
CN107735351B (en) 2019-12-31
CN107735351A (en) 2018-02-23
JP2017001840A (en) 2017-01-05
KR101942213B1 (en) 2019-01-24
WO2016199721A1 (en) 2016-12-15

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