WO2011067856A1 - 作業車 - Google Patents

作業車 Download PDF

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Publication number
WO2011067856A1
WO2011067856A1 PCT/JP2009/070417 JP2009070417W WO2011067856A1 WO 2011067856 A1 WO2011067856 A1 WO 2011067856A1 JP 2009070417 W JP2009070417 W JP 2009070417W WO 2011067856 A1 WO2011067856 A1 WO 2011067856A1
Authority
WO
WIPO (PCT)
Prior art keywords
pad
sliding member
work vehicle
roller
work
Prior art date
Application number
PCT/JP2009/070417
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
博 青山
貴彦 澤田
Original Assignee
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to KR1020127003061A priority Critical patent/KR101357956B1/ko
Priority to PCT/JP2009/070417 priority patent/WO2011067856A1/ja
Priority to CN200980160806.4A priority patent/CN102471041B/zh
Priority to JP2011544161A priority patent/JP5318224B2/ja
Publication of WO2011067856A1 publication Critical patent/WO2011067856A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes 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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes 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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration

Definitions

  • the present invention relates to a work vehicle having a translational expansion / contraction mechanism.
  • a work vehicle provided with a translational telescopic mechanism configured to extend and contract by translating a plurality of long structures (work booms and ladders) combined in a nested manner includes a crane vehicle, an aerial work vehicle, There are firefighting ladder cars.
  • work is performed by appropriately expanding and contracting the work device according to the work radius, but in order to smoothly perform the expansion and contraction operation of the work device, sliding of two long structures that translate and extend relative to each other is performed. It is necessary to consider sex.
  • the working device having the translational expansion / contraction mechanism as described above has a load resistance that allows a heavy object to be hung at the tip or the working radius can be increased, and the weight of the device can be reduced. Is required.
  • a method of suppressing the plate thickness of a member by replacing with a material having high strength is often used. The same applies to the reduction of the weight of the work boom of the work vehicle and the ladder of the fire-fighting ladder vehicle, and it is common to design the plate so as not to cause a problem in strength while suppressing the plate thickness.
  • An object of the present invention is to provide a work vehicle having a lightweight translational expansion / contraction mechanism that can withstand a heavy load.
  • a translational expansion / contraction mechanism constituted by a plurality of elongated structures combined in a nested manner, a portion in which two elongated structures that translate and extend each other overlap each other.
  • a first sliding member that slides on one of the two long structures, and a portion where the two long structures overlap, the first sliding member And a second sliding member that comes into contact with the one long structure for the first time when a load of a predetermined size or more is applied thereto.
  • size acts on the roller in the 1st Embodiment of this invention.
  • the perspective view of the sliding structure which concerns on the modification of the 7th Embodiment of this invention.
  • the perspective view of the aerial work vehicle which concerns on the 8th Embodiment of this invention.
  • the perspective view of the fire-fighting ladder vehicle which concerns on the 9th Embodiment of this invention.
  • FIG. 1 is a perspective view of a crane truck according to an embodiment of the present invention
  • FIG. 2 is an enlarged view of an overlapping portion 17 of two work booms 7 and 8 in the crane truck of FIG.
  • a crane vehicle (work vehicle) shown in FIG. 1 includes a work device 40 composed of a plurality of long work booms (long structures) 7 and 8, and a crane 41 is provided at the tip of the work device 40. Is attached.
  • the work boom (front-end work boom) 7 positioned on the front end side of the work device 40 can be housed inside the work boom (rear-end work boom) 8 positioned on the rear end side. It is formed to be slightly smaller and is combined with the rear end side work boom 8 in a nested manner. That is, the working device 40 includes a translational telescopic mechanism whose length can be expanded and contracted when the front end side working boom 7 and the rear end side working boom 8 are translated relative to each other, and the working radius can be adjusted by this mechanism. ing.
  • the work boom 7 or work boom 8 positioned above each of the overlapping parts (overlapping part 17) of the front work boom 7 and the rear work boom 8 assembled in a nested manner
  • the sliding structure 30 (30A, 30B) that slides is installed.
  • the front end side work boom 7 and the rear end side work boom 8 are Sliding structures 30A and 30B are installed in portions that overlap in the vertical direction.
  • the sliding structure 30 ⁇ / b> A is installed below the lower surface of the outer side surface of the front end side work boom 7, and the rear end side is slidable with the outer side surface of the front end side work boom 7.
  • the sliding structure 30 ⁇ / b> B is installed below the upper surface of the inner side surface of the rear end side work boom 8, and the front end side work boom 7 is slidable with the inner side surface of the rear end side work boom 8. It is fixed at the rear end. From the viewpoint of improving the stability during sliding and the load resistance of the working device, it is preferable to install a plurality of sliding structures 30A, 30B in the width direction of the working booms 7, 8. In the embodiment, two sliding structures 30A and 30B are respectively installed in the width direction of the work booms 7 and 8 (in FIG. 2, one sliding structure 30A and 30B is provided for each work boom 7 and 8. Only is shown).
  • FIG. 3 is a perspective view of the sliding structure 30A according to the first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of the sliding structure 30A fixed to the tip of the work boom 8.
  • symbol is attached
  • the sliding structure 30 ⁇ / b> A shown in these drawings is formed between the two rollers 1 and the two rollers 1 disposed at intervals in the longitudinal direction of the rear end side work boom 8 (the expansion / contraction direction of the translational expansion / contraction mechanism).
  • An installed pad 3, two rollers 1, and a support member 6 that supports the pad 3 are provided.
  • the support member 6 rotatably supports the two rollers 1 and the pad 3, and the rear end side work boom 8 is interposed via a pad base shaft (rotation shaft) 5 positioned between the two rollers 1. Is rotatably supported. As shown in FIG. 5 to be described later, the support member 6 is elastically deformed in a convex shape around the pad base shaft 5 in accordance with the magnitude of the load acting on the two rollers 1 via the distal end side work boom 7. It is made of a material (a material that bends in a convex shape). In addition, from the viewpoint of deforming the support member 6 in the same manner as the work booms 7 and 8, it is preferable to form the same material (for example, carbon steel or stainless steel).
  • the support member 6 in the present embodiment is a frame-like structure, and as shown in FIG. 2, the pad base shaft 5 is interposed in a hole provided by cutting out the lower surface on the front end side of the rear end side work boom 8. It is supported.
  • the roller 1 is a sliding member obtained by machining carbon steel, stainless steel, or aluminum alloy into a cylindrical shape by machining, and is fixed to the distal end side work boom 7 located above the sliding member so as to be always slidable.
  • the roller 1 is supported by a roller shaft 2 via a sliding member (not shown) such as a bearing installed at its core portion, and is rotatable around the roller shaft 2.
  • the pad 3 is a sliding member that can come into contact with the work boom 7 on which the roller 1 slides, and is fixed to the upper part of the pad base 4. From the viewpoint of ensuring strength and slidability, the pad 3 is preferably formed of a fiber reinforced composite material. Further, as shown in FIG. 4, the pad 3 is formed so that the upper end surface thereof is positioned below the upper end surface of the roller 1 in a state where the load acting on the roller 1 is small and the support member 6 is not deformed. Has been. That is, in this state, the pad 3 is not in contact with the distal end side work boom 7.
  • pad base shafts 5 protrude from both side surfaces of the pad base 4, and the two pad base shafts 5 are supported by the rear end side work boom 8 through through holes provided in the support member 6. .
  • the rotation shafts of the support member 6 and the pad base 4 are combined with the pad base shaft 5 for simplification of the configuration.
  • the rotation shafts of the support member 6 and the pad base 4 are individually provided. It may be provided.
  • the sliding structure 30 ⁇ / b> B is rotatably supported via the pad base shaft 5 in a recess provided on the upper surface of the outer surface of the distal end side work boom 7.
  • the roller 1 of the sliding structure 30B is supported by the support member 6 through the roller shaft 2 so as to be slidable at all times with the distal end side work boom 8 positioned above the roller 1.
  • the upper end surface of the pad 3 is formed to be positioned below the upper end surface of the roller 1 in a state where the support member 6 is not deformed.
  • the other parts are the same as those of the sliding structure 30A, and the description thereof is omitted.
  • FIG. 5 is a cross-sectional view of the sliding structure 30 ⁇ / b> A when a load of a predetermined size or more is applied to the roller 1.
  • the load having a predetermined magnitude means that when the pad 3 comes into contact with the lower surface of the work boom 7 for the first time as the support member 6 is elastically deformed in a convex shape upward, Indicates the applied load.
  • a load (set load) that acts on the roller 1 when a heavy object close to the design load of the work device 40 is suspended on the crane 41 as a load of a predetermined size that acts on the roller 1. It is assumed that it is set.
  • the lower surface of the work boom 7 may be plastically deformed.
  • the crane truck according to the present embodiment is configured such that, in such a case, the pad 3 contacts the lower surface of the work boom 7 in addition to the two rollers 1 as described above. Thereby, even when a heavy load is applied to the work device 40, plastic deformation of the lower surface of the work boom 7 can be prevented without increasing the plate thickness of the lower surface of the work boom 7. That is, according to the present embodiment, it is possible to provide a work vehicle including a lightweight work device that does not deform even when a heavy load is applied.
  • the contact with the work boom 7 is made only when a load of a predetermined magnitude or more is applied to the roller 1.
  • the pad 3 capable of being in surface contact with the work boom 7 was used.
  • a sliding member for example, a roller or the like
  • the pad 3 may be formed of metal or resin in addition to the fiber reinforced composite material described above.
  • the pad 3 is formed of a fiber reinforced composite material, scratches generated on the work boom 7 can be reduced as compared with the case of using a metal one, and moreover than the case of using a resin one. The wear amount of the pad 3 can be reduced.
  • FIG. 6 is a perspective view of the pad 3A according to the second embodiment of the present invention
  • FIG. It is a perspective view of the pad 3B which concerns on the modification of the 2nd Embodiment of invention.
  • the pad 3A shown in FIG. 6 is formed by laminating a plurality of prepreg sheets 9 containing a semi-cured epoxy resin on a cloth woven with glass fibers orthogonal to each other and heating and pressing with a press plate.
  • a cloth 10 woven with organic fibers orthogonal to each other is fixed on the surface in contact with the booms 7 and 8.
  • As a method of fixing the cloth 10 in this way there are a method of integrally molding with the prepreg sheet 9 at the time of press molding of the pad 3A, and a method of adhering the cloth 10 to the upper surface of the pad 3A after molding.
  • the organic fiber used for the fabric 10 include fibers made of polybenzimidazole, polyparaphenylenebenzobisoxazole, aromatic polyamide, polyarylate, and aromatic polyester.
  • the pad 3B shown in FIG. 7 is formed by laminating a plurality of prepreg sheets 9 in the same manner as the pad 3A, and the surface that comes into contact with the work booms 7 and 8 is obtained by cutting organic fibers short (for example, from 1 mm A sheet 11 formed in a cloth shape is fixed.
  • a method for fixing the sheet 11 there are a method in which the sheet 11 is integrally formed with the prepreg sheet 9 at the time of press molding of the pad 3B, and a method in which the sheet 11 is adhered to the upper surface of the pad 3B after molding. What is necessary is just to use the thing similar to the fiber used for 10.
  • FIG. 8 is a diagram showing a change in friction coefficient between the fiber-reinforced composite material and the metal.
  • the friction coefficient between the composite material formed only of the prepreg sheet 9 made of glass fiber and the metal increases as the number of friction repetitions increases. That is, if the pad 3 is made of a composite material made only of glass fibers, the coefficient of friction with the contact surface with the metal work boom 7 increases, and the expansion and contraction driving force of the work booms 7 and 8 increases. There is a risk of causing an increase or an increase in the amount of wear on the pad 3 and the lower surface of the work boom 7.
  • FIG. 9 is a perspective view of a sliding structure including the pad 3C according to the third embodiment of the present invention.
  • the surface 15 where the pad 3C comes into contact with the work booms 7 and 8 is formed as a curved surface having a constant curvature convex upward toward the work booms 7 and 8. .
  • the surface where the pad 3 contacts the work booms 7 and 8 is made flat as in the first embodiment, corners are formed at the ends of the flat surfaces, so that the pad 3 abruptly forms the work booms 7 and 8. There is a possibility that the corners may be damaged when touching.
  • the surface 15 is provided in a curved shape as in the present embodiment, even if the working booms 7 and 8 are suddenly contacted or contacted at various angles, the local compressive stress increases. Therefore, the reliability on the strength of the pad 3C can be improved.
  • FIG. 10 is a perspective view of a sliding structure 34 according to the fourth embodiment of the present invention.
  • the roller 1 shown in this figure is supported by a bearing 12 via a roller shaft 2.
  • a leaf spring 13 that shrinks in the vertical direction according to the magnitude of the acting load is attached below the bearing 12, and the bearing 12 is fixed to the support member 6 via the leaf spring 13.
  • there is bolt fastening as a method of coupling the bearing 12 and the leaf spring 13, and the leaf spring 13 and the support member 6, for example, there is bolt fastening.
  • the load acting on the roller 1 is small, the upper end surface of the pad 3 is positioned below the upper end surface of the roller 1, and when the load acting on the roller 1 reaches the set load, the upper end surface of the pad 3.
  • the leaf spring 13 contracts before the contact with the work boom 7, and the pad 3 comes into contact with the work boom 7 for the first time.
  • the pad 3 can be brought into contact with the work boom without using the elastic deformation of the support member 6 as in the first embodiment. You may fix to the front end of the boom 8 or the rear end of the front end side work boom 7 so that rotation is impossible.
  • leaf springs 13 are provided at both ends of the roller shaft 2 as in the present embodiment, even if there is a variation in the direction of the roller shaft 2 in the load acting on the roller 1 from the work boom, 2 according to the variation. Since the two leaf springs 13 are individually deformed, variations in the compressive load when the roller 1 contacts the lower surface of the work boom 7 can be reduced.
  • FIG. 11 is a perspective view of a sliding structure 34A according to a modification of the fourth embodiment of the present invention.
  • the sliding structure 34A shown in this figure supports the bearing 12 via a coil spring 14 instead of the leaf spring 13 in FIG. Even if the bearing 12 is supported by the coil spring 14 in this way, the pad 3 can be brought into contact with the work boom 7 in addition to the roller 1 when the load acting on the roller 1 reaches a set load or more. As in the example of FIG. 10, the plastic deformation of the work boom 7 can be prevented.
  • the load threshold value for sinking the roller 1 can be set finely by changing the number of turns of the coil spring 14. It will be an advantage over the case.
  • FIG. 12 is a cross-sectional view of the sliding structure 35 according to the fifth embodiment of the present invention.
  • the sliding structure 35 shown in this figure is arranged so as to sandwich two rollers 1 arranged adjacently along the longitudinal direction of the work boom 8 and the two rollers 1 from the longitudinal direction of the work boom 8. And a support member 6 rotatably supported by the work boom 8 via a load transmission pin 16.
  • the bearing 12 that supports the roller 1 is fixed on a shelf plate 25 attached to the side surface of the support member 6 via a leaf spring 13.
  • the roller 1 and the pad 3 are compared with the case where there are two rollers 1 and one pad 3 as in the first embodiment.
  • the load sharing can be further reduced.
  • the pad 3 is arranged so as to sandwich the roller 1 from the outside. Compared to the case of the first embodiment, the pad 3 is accessed when performing the pad replacement work. Since it is easy, replacement work can be performed speedily.
  • the case where two rollers 1 and two pads 3 are attached has been described as an example. However, one or more rollers 1 may be provided, and one pad 3 may be provided. Three or more may be sufficient.
  • FIG. 13 is a perspective view of a sliding structure 36 according to the sixth embodiment of the present invention.
  • the sliding structure 36 shown in this figure includes a pad base 4 fixed to the lower surface of the inner surface of the rear end side work boom 8, a pad 3 fixed on the pad base 4, and a rear end side work boom 8.
  • a bearing 12 fixed to a lower surface of the inner surface of the inner surface of the inner surface of the inner surface of the inner surface of the inner surface of the inner surface of the inner surface by a leaf spring 13 and a roller 1 supported by the bearing 12 through a roller shaft 2 are provided.
  • the upper end of the pad 3 is positioned below the upper end of the roller 1 when the leaf spring 13 is extended as shown in FIG. 13, and the leaf spring 13 contracts. The height difference between the two is reduced.
  • the pad 3 can be brought into contact with the lower surface of the distal working boom 7 in addition to the roller 1. Plastic deformation of the work boom 7 can be prevented.
  • the support member 6 and the like as in the first embodiment are not necessary, so that the number of parts can be reduced and the manufacturing cost can be reduced.
  • FIG. 14 is a perspective view of a sliding structure 36A according to a modification of the sixth embodiment of the present invention.
  • the sliding structure 36A shown in this figure includes a bearing 12 fixed to the lower surface of the inner surface of the rear end side working boom 8 via a leaf spring 13, and a roller 1 supported by the bearing 12 via a roller shaft 2.
  • two pad bases 4 fixed to the lower surface of the inner surface of the rear end side work boom 8 so as to sandwich the roller 1 from the direction of expansion and contraction of the work device 40, and fixed on the two pad bases 4 respectively.
  • a pad 3D is provided.
  • the pad 3D is formed so that its cross-sectional area increases as it approaches the work boom 7 from the viewpoint of securing a large contact area with the work boom 7 as much as possible.
  • the leaf spring 13 when the leaf spring 13 is extended, the upper end portion of the pad 3D is positioned below the upper end portion of the roller 1, and when the leaf spring 13 contracts, the height difference between the two becomes smaller. It is like that.
  • FIG. 15 is a perspective view of a sliding structure 37 according to the seventh embodiment of the present invention.
  • the sliding structure 37 shown in this figure includes a pad base 4 fixed to the lower surface of the inner surface of the rear end side work boom 8 via a leaf spring 13, a pad 3 fixed on the pad base 4, A bearing 12 fixed to the lower surface of the inner side surface of the rear end side working boom 8 and a roller 1 supported by the bearing 12 via a roller shaft 2 are provided.
  • the upper end of the roller 1 is located below the upper end of the pad 3 when the leaf spring 13 is extended as shown in FIG. When 13 shrinks, the difference in height between the two becomes smaller. That is, in the present embodiment, the pad 3 can always slide on the lower surface of the work boom 7.
  • the roller 1 can be brought into contact with the lower surface of the distal end side work boom 7 in addition to the pad 3. Plastic deformation of the work boom 7 can be prevented.
  • the work boom 7 can be smoothly expanded and contracted even when an excessive load is applied.
  • a lubricant such as grease is applied to the surface where the pad 3 comes into contact with the work boom 7 from the viewpoint of improving slidability. It is preferable to apply.
  • FIG. 16 is a perspective view of a sliding structure 37A according to a modification of the seventh embodiment of the present invention.
  • the sliding structure 37 ⁇ / b> A shown in this figure includes a bearing 12 fixed to the lower surface of the inner surface of the rear end side working boom 8, a roller 1 supported on the bearing 12 via the roller shaft 2, and a working device 40.
  • Two pad bases 4 fixed to the lower surface of the inner side surface of the rear end side work boom 8 via the leaf spring 13 so as to sandwich the roller 1 from the extending and contracting direction, and fixed on the two pad bases 4 respectively.
  • a pad 3D is provided.
  • the leaf spring 13 when the leaf spring 13 is extended, the upper end of the roller 1 is located below the upper end of the pad 3D, and when the leaf spring 13 is contracted, the height difference between the two is reduced. It has become.
  • FIG. 17 is a perspective view of an aerial work vehicle according to an eighth embodiment of the present invention.
  • the aerial work vehicle shown in this figure includes a working device composed of three working booms combined in a nested manner, and has two working boom overlapping portions 17.
  • a working device composed of three working booms combined in a nested manner, and has two working boom overlapping portions 17.
  • This embodiment relates to a fire fighting ladder car.
  • a ladder of a fire fighting ladder car is formed by a welded structure of a square steel pipe, and a thin plate having a thickness of about 2 to 5 mm is used. Therefore, when the maximum loading mass is mounted on the basket installed at the tip of the ladder and the ladder is fully extended, the sliding structure (roller lifting part) installed at the overlapping part of the ladder part High local stress was generated, which could cause plastic deformation or buckling deformation of the entire ladder.
  • the present embodiment has been invented in view of this problem.
  • FIG. 18 is a perspective view of a fire ladder truck according to the ninth embodiment of the present invention.
  • the fire fighting ladder car shown in this figure includes a four-stage ladder (working device) 50 composed of four ladder parts combined in a nested manner, and has three overlapping parts 18 of the ladder parts.
  • a basket 55 is attached to the tip of the ladder 50.
  • the four ladder parts constituting the ladder 50 are arranged in order from the front end to the rear end of the ladder 50, the first ladder part 51, the second ladder part 52, the third ladder part 53, and the fourth ladder part 54. Called.
  • FIG. 19 is a perspective view of the sliding structure 39 in the overlapping portion 18 of the first ladder portion 51 and the second ladder portion 52.
  • the sliding structure 39 shown in this figure is installed on the lower side of the lower bone 19 of the first ladder portion 51, and the lower bone 20 of the second ladder portion 52 is slidable with the lower bone 19. It is installed at the tip.
  • the lower bone 20 of the second ladder portion 52 has a gap extending in the expansion / contraction direction of the ladder 50, once split into two forks at the tip side, and then joined again. Yes.
  • the support member 6 of the sliding structure 39 is accommodated in the space of the lower bone 20 and is supported by the lower bone 20 through the load transmission pin 16 so as to be rotatable.
  • the support member 6 supports two rollers 1 that can always slide with the lower bone 19 and two pad bases 4 so as to be rotatable.
  • the two pad bases 4 are arranged with the load transmission pin 16 in between, and the two rollers 1 are arranged with the two pad bases 4 in between.
  • Pads 3 (not shown) are fixed on the two pad bases 4, and when the load acting on the roller 1 is small, the upper end of the pad 3 is located below the upper end of the roller 1.
  • the support member 6 is the same as in the case of the first embodiment. Is gradually elastically convex upward, so that when the load acting on the roller 1 reaches the set load, the two pads 3 come into contact with the lower bone 19 in addition to the two rollers 1. As a result, the maximum compressive stress on the lower surface of the lower bone 19 is reduced, so that the plastic deformation of the lower bone 19 is prevented. That is, according to the present embodiment, it is possible to provide a lightweight ladder that does not deform even when a heavy load is applied, so that the ladder can be expanded and contracted quickly, and the time required for rescue operations can be shortened. Can do.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)
PCT/JP2009/070417 2009-12-04 2009-12-04 作業車 WO2011067856A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020127003061A KR101357956B1 (ko) 2009-12-04 2009-12-04 작업차
PCT/JP2009/070417 WO2011067856A1 (ja) 2009-12-04 2009-12-04 作業車
CN200980160806.4A CN102471041B (zh) 2009-12-04 2009-12-04 作业车
JP2011544161A JP5318224B2 (ja) 2009-12-04 2009-12-04 作業車

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/070417 WO2011067856A1 (ja) 2009-12-04 2009-12-04 作業車

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WO2011067856A1 true WO2011067856A1 (ja) 2011-06-09

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KR (1) KR101357956B1 (ko)
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Publication number Priority date Publication date Assignee Title
CN102275835A (zh) * 2011-06-16 2011-12-14 三一汽车起重机械有限公司 移动导轨机构及具有其的起重机
DE102011119654A1 (de) 2011-11-29 2013-05-29 Liebherr-Werk Ehingen Gmbh Mobile Arbeitsmaschine, insbesondere Fahrzeugkran
CN103174715A (zh) * 2011-12-23 2013-06-26 苏州海伦哲专用车辆有限公司 一种伸缩臂滑块装置

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CN104847759B (zh) * 2014-09-15 2017-04-05 北汽福田汽车股份有限公司 一种伸缩臂架及具有其的起重机和胎带机
KR102341864B1 (ko) * 2021-06-17 2021-12-21 강희곤 손상방지 기능을 갖는 사다리차 붐
CN113501449B (zh) * 2021-07-30 2023-05-09 湖南三一中型起重机械有限公司 作业机械及作业机械支腿组件

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