Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
  • E04G21/04—Devices for both conveying and distributing
  • E04G21/0418—Devices for both conveying and distributing with distribution hose
  • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
• • 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
  • B66C23/54—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
• • 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
• • 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
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
  • E04G21/04—Devices for both conveying and distributing
  • E04G21/0418—Devices for both conveying and distributing with distribution hose
  • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck

Definitions

• the invention relates to a concrete pump mast arm segment with egg nem upper chord, a lower chord and two side panels that connect the upper and lower chord.
• the invention also relates to a method for producing such a concrete pump-mast arm segment.
• Concrete pump mast arms are used, for example, to guide a delivery line connected to a concrete pump in such a way that the liquid concrete conveyed by the concrete pump can be discharged in an area remote from the concrete pump.
• a concrete pump mast arm is usually composed of a plurality of Mastarm segments, wherein in an unfolded state, the Mastarm segments in their sum make up the length of the mast arm and wherein in a folded state, the Mastarm segments are folded together in a compact state to facilitate the transport.
• the object of the invention is to present a concrete pump boom segment and a method for producing a concrete pump boom segment so that the concrete pump boom arm segment withstands static and dynamic loads well and is inexpensive to manufacture. Based on the cited prior art, the object is achieved with the features of the independent claims. Advantageous Ausrete tion forms are given in the dependent claims.
• the concrete pump mast arm segment according to the invention comprises a longitudinal connection between two subregions of the mast arm segment, which adjoin one another in the longitudinal direction.
• the Leksver connection extends over a belt section and a side panel section. In the first part region and in the second part region, the side part section is folded over the belt part.
• the material thickness of the Gurtab section is greater in the first portion than the second portion.
• the invention has recognized that such a longitudinal connection is well suited to accommodate the static and dynamic forces occurring in the concrete pump boom segment.
• the side panel portion is folded relative to the belt portion, results in an increased local stability ver compared with a classic concrete pump mast arm segment, in which between the belt and side part a weld is formed. If a larger load can be absorbed in the area of the edges, it is possible in certain sub-areas of the boom segment with a reduced material thickness in the Be satisfied with the upper belt and / or lower belt.
• the inventive Shen longitudinal connection the areas of different Ma teriallands are interconnected.
• the longitudinal connection may be formed as a weld. With the weld, a component of the first portion and a component of the second portion may be welded together to shock ver.
• the material thickness in the first subregion can be, for example, between 2 mm and 15 mm, preferably between 3 mm and 10 mm.
• the material thickness in the second sectionbe rich may be by a value between 0.5 mm and 4 mm, preferably between 1 mm and 3 mm less than the material thickness in the first part.
• the details of the material thickness according to the invention relate to areas away from the weld.
• the upper flange, the lower flange and the two side parts can form a cross-sectionally box-shaped profile of the concrete pump and mast arm segment.
• the side parts of the box-shaped profile can be arranged in a plane parallel to the gravitational plane.
• gravity acts transversely to the upper chord or lower chordal plane when the longitudinal axis of the mast arm segment is intended to face in a lateral direction.
• the upper and lower chords of the mast arm segment are then subjected to a large bending load.
• the terms upper chord and lower chord are not to be understood as an indication of the situation that the upper chord and the lower chord have relative to each other.
• the concrete pump mast arm segment may comprise a pivot axis for a pivotal connection with a neighboring concrete pump mast arm segment.
• the pivot axis can do so be aligned so that it cuts the sides of the concrete pump boom segment.
• the longitudinal connection according to the invention extends over sections of two surfaces of the boom segment, namely a section from a belt surface and tenivity a portion of a Be.
• the belt surface and the side surface may cross in the cross-section of the mast arm segment considered an angle close, which is between 60 ° and 120 °, preferably between 80 ° and 100 °, more preferably at about 90 °.
• Correspondingly large may be the angle formed by the fold between the Gurtab and the side panel section.
• the material thickness in the belt section can match the material thickness in the side panel section. The same can apply to the second subarea.
• the belt portion may extend in the plane adjacent to the longitudinal connection on the first portion in a plane.
• the side panel section can also extend in the plane adjacent to the longitudinal connection first portion in a plane he. If both the belt portion and the side part section have a planar shape, the folding is between tween two easier.
• the belt section and / or the side panel section may extend in a plane in the second section adjoining the longitudinal connection from the other side.
• the belt portions in the first portion and the second portion may extend in the same plane.
• the side panel sections in the first partial area and in the second partial area may extend in the same plane.
• the longitudinal connection according to the invention can extend over the ge entire width of the belt surface.
• the longitudinal connection may further extend over two side sections, wherein the one side section adjoins the belt section on one side and the second side section adjoins the belt section on the other side.
• the mast arm segment may have a Bezo gene symmetrical shape in the region of the longitudinal connection on a longitudinal axis.
• the Leksver connection may be aligned in the transverse direction, so that the longitudinal direction is cut at an angle of 90 °.
• the belt portion may be réellere in the first portion without weld seam between the two side sections. One can therefore move parallel to the longitudinal connection over the belt section without cutting a weld.
• a longitudinal connection with corresponding features may be formed in the opposite belt surface.
• the Leksver compounds in the two belt surfaces may be directed towards each other, that a plane that extends through the Leksver connections, the longitudinal axis of the Mastarm segment intersects at a right angle.
• connection side panel section can be welded ver with another component of the mast arm segment.
• the connection can be a
• the weld may extend in the longitudinal direction of the Mastarm segment.
• the side panel portion may be connected in abutment with the other component. These features may apply to the first and / or the second Operabe rich of the mast arm segment.
• the further component may be a side part section which is folded from the opposite belt surface. If one moves parallel to the longitudinal connection of one belt surface to the other belt surface, so you cut except the weld between the two side sections no further
• the two side sections, which are joined together by the longitudinally aligned weld, may have a matching material thickness. These features may apply to the first and / or the second Partbe rich of the mast arm segment.
• the side plate may extend partially in the plane of the sides.
• the side plate may be connected by a weld with the folded side section.
• the side plate may be connected in abutment with the folded soteilab section.
• the side plate may have a lower material thickness than the folded side section.
• the material thickness of the side plate can, for example between 30% and 70%, preferably between 40% and 60% of the material thickness of the folded side section are.
• the side plate may be connected on one side with a soteilab section, which is folded over the upper flange, and be connected on the other side with a side panel portion which is folded over the lower flange. If you move parallel to the longitudinal connection of the one belt surface to the other belt surface, so you cut except the two welds of the side plate no further
• the features described for the side panel may apply to a side panel of the first portion of the concrete pump-Mastarm- segment and / or a side plate of the second portion of the concrete pump-mast arm segment.
• a side plate of the first portion of the mast arm segment may be longitudinally adjacent to a side plate of the second portion of the Mastarm segment.
• the longitudinal connection may extend over the United bond between the two side plates.
• the side panels may be welded together in abutment.
• the longitudinal connection between the side panels may be aligned with the longitudinal connection in the upper flange and / or the longitudinal connection in the lower flange such that a plane extending through the longitudinal connections intersects the longitudinal axis of the Mastarm segment at a right angle.
• the mast arm segment may comprise a first side plate and a two tes side plate, so that the first side plate forms a portion of the one side part and the second side plate ei nen portion of the opposite side part.
• This can apply to the first and / or the second subsection of the mast arm segment. It can be assembled in this way a kastenförmi ges profile of four components, namely two Gurt-components with folded side panels and two side panels.
• the side parts can be oriented parallel to one another in a section perpendicular to the longitudinal axis of the mast arm segment and / or the belt surfaces can be aligned parallel to one another.
• the mast arm segment may taper from the first portion towards the second portion.
• the distance between opposing surfaces of the box-shaped profile becomes smaller as one approaches the longitudinal joint.
• the second subarea of the Distance between opposing surfaces of the box-shaped profile lower, if one ent from the longitudinal joint ent.
• the taper can refer to the distance between the two side surfaces and / or the distance between the upper belt and lower belt.
• the first portion may be located closer to a proximal end and the second portion closer to a distal end of the mast arm segment.
• Proximal refers to one end of the boom arm segment, which in the unfolded state of the boom arm is closer to the base (eg the truck) on which the boom arm is suspended. Conversely, in the unfolded state, the distal end of the mast arm segment is closer to the free end of the mast arm.
• one or more beads can be formed in each case through which the profile of the concrete pump-Mastarm segment according to the invention is reinforced.
• the beads may extend in the longitudinal direction of the mast arm segment. If a single bead is formed in a surface, then the bead can be arranged centrally between two edges delimiting the surface. It is possible to have narrow beads extending over 5% to 20% of the width of the surface. Also possible are wide beads that extend over 20% to 60% of the width of the surface.
• the beads may be curved inwardly relative to the surface or curved outward Shen.
• the mast arm segment may include a reinforcing plate extending across the longitudinal joint.
• the reinforcing plate can rest flat on other components of the Mastarm segment.
• the reinforcing sheet may rich in the first sectionbe and be connected in the second portion of the mast arm segment with at the components of the mast arm segment.
• the United bond may include a weld that extends along a Circumferential line of the reinforcing sheet can extend.
• the reinforcing plate can be welded over its entire circumference with other components of the Mastarm segment.
• the reinforcing sheet can overlap with the folded soteilab section.
• Each reinforcing plate can be seen easily in duplicate, wherein the two reinforcing plates can be arranged symmetrically to each other based on a vertical longitudinal section of the mast arm segment.
• the mast arm segment may comprise a total of four reinforcing sheets extending over the same longitudinal joint.
• two reinforcing plates can overlap with the side panel sections, which are folded over the upper belt, and two Ver strengthening plates overlap with the side panel sections, which are folded relative to the lower flange.
• the reinforcing sheet may be configured to taper with increasing distance from the longitudinal joint. This may apply to the first portion and / or the second Operabe rich of the branch arm segment.
• the taper may relate to the surface area and / or thickness of the reinforcing sheet.
• the overlapping with the soteilab reinforcing sheet may be shaped and angeord net, that the reinforcing sheet in the region of the L jossver connection arranged close to an edge of a belt section is and that the distance to the edge is increased with increasing distance from the longitudinal connection.
• This can apply to the first subarea and / or the second subarea of the mast arm segment.
• the uniform transfer of forces between tween the sub-areas of the mast arm segment can be promoted.
• the reinforcing sheet may overlap in its entirety with the side part. It is also possible that the reinforcing sheet protrudes upwards or downwards beyond the side part. The highest or lowest point in this section of the mast arm segment is then not formed by the upper flange or lower belt, but from the protruding section from the reinforcing plate. It is also possible for a reinforcing plate, which extends over the entire width of the upper belt or lower belt and overlaps with two opposite Be ten money in the manner of a cuff.
• the reinforcing sheet may overlap with a bead formed in a side part.
• the bead can project outwards relative to the surface of the side part.
• the reinforcing sheet may end on an inclined surface of the bead.
• the reinforcing plate overlaps with an area of the bead, which is aligned parallel to the side part Tet.
• the reinforcing sheet may have a greater thickness than the bead so that the reinforcing sheet protrudes more to the side than the bead.
• the reinforcing plate can have a recess adapted to the bead, so that the reinforcing plate in the region of the bead does not protrude more strongly outwards.
• the upper belt and / or the lower belt is equipped with one or more reinforcing plates Ver. These reinforcing sheets may have the same features described in connection with reinforcing sheets arranged on the side piece.
• the concrete pump-mast arm segment according to the invention may be equipped at each proximal end and at its distal end in each case with a pivot joint element.
• the Schwenkge steering element may be adapted to form a pivot joint with a matching pivot element of an adjacent Mastarm segment or a base over which the Mastarm- segment can be pivoted relative to the other part.
• the mast arm segment may include a pivot point for a hydraulic cylinder extending from the pivot point toward the distal end of the mast arm segment.
• the longitudinal connection according to the invention can be arranged between the proximal end of the Mastarm segment and the articulation point.
• the mast arm segment may include a plurality of such compounds L jossver, in particular at least three such Lekssverbin applications, preferably at least four such longitudinal connections, which are arranged between the proximal end of the mast arm segment and the pivot point.
• the material thickness can decrease successively with increasing distance from the proximal end. Between two longitudinal joints, the material thickness can be constant. This may apply to the upper belt, the lower belt and / or the side panels.
• the invention also relates to a concrete pump mast arm with a plurality of mast arm segments, wherein at least one of the mast arm segments summarizes a longitudinal connection according to the invention.
• a pivot joint is formed between each two adjacent Mastarm segments.
• the axis of the Schwenkge Lenk can be aligned so that it extends through both sides of the Mastarm segment through, the two sides preferably cut at right angles to who or with this direction an angle of less than 10 °, preferably less than 5 ° ,
• the belt surfaces Kings nen extend parallel to the pivot axis.
• the joint may comprise a first articulated lever, the
• the hinge may comprise a second toggle lever pivotally attached to the second mast arm segment and also hinged to the first toggle lever.
• a hydraulic cylinder may extend from the first mast arm segment to the first toggle such that a lift of the hydraulic cylinder translates into pivotal movement between the mast arm segments.
• the hydra likzylinder is seen from the first mast arm segment seen before preferably beyond the second articulated lever to the first Ge steering lever struck.
• the concrete pump mast arm can comprise a delivery line for a thick material, in particular fresh concrete, which extends along the mast arm.
• Each segment of the Mastarms may be assigned to a segment of the delivery line.
• Neighboring Seg elements of the delivery line can be connected to each other via a hinge, wherein the hinge axis is preferably coaxial with the joint with which the associated Mastarm segments are connected to each other.
• the single segment of winning device may be formed as a rigid pipe.
• the invention further relates to a method for producing egg nes concrete pump-boom arm segment, wherein the boom segment comprises a top flange, a bottom flange, and two connecting the top and bottom chords side parts.
• a longitudinal connection is generated between a first portion of the Mastarm segment and a second portion of the Mastarm segment, which extends over a belt portion and a side panel portion.
• a longitudinal connection is generated between a first portion of the Mastarm segment and a second portion of the Mastarm segment, which extends over a belt portion and a side panel portion.
• the material thickness of the belt portion is greater in the first portion than in the second portion.
• the method can be developed with further features that are described in the context of the boom segment according to the invention be.
• the boom segment can be trained len with other Merkma, which are described in the context of erfindungsge MAESSEN method.
• Fig. 1 a concrete pump vehicle with a mast arm in the folded state
• Fig. 2 the concrete pump vehicle of Fig. 1 with unfolded
• FIG. 3 shows a mast arm segment according to the invention
• 4 shows a joint between two mast arm segments
• 5 shows a detail of a mast arm segment according to the invention
• 6 shows the view according to FIG. 5 in a further embodiment of the invention
• Fig. 7 is a section along line A-A through the Ausry
• FIG. 8 shows a detail of a mast arm segment in an alternative embodiment of the invention.
• Fig. 9 is a section along line B-B in Fig. 8; Fig. 10: The view of Figure 9 in a further Auspar approximately form of the invention.
• FIG. 11 shows the view according to FIG. 9 in a further embodiment of the invention.
• FIG. 12 shows the view according to FIG. 8 in a further embodiment of the invention
• FIG. 13 is a view of a belt surface of a erfindungsge MAESSEN Mastarm segment.
• a truck 14 shown in FIG. 1 is equipped with a concrete pump 15 which conveys liquid concrete from a prefill container 16 through a delivery line 17.
• the delivery line 17 he stretches along a mast arm 18 which is rotatably mounted on a turntable 19.
• the mast arm 18 comprises three Mastarm- segments 20, 21, 22, which are hinged together. By the mast arm segments 20, 21, 22 are pivoted about the joints relative to each other, the mast arm 18 between egg nem folded state (Fig. 1) and an unfolded to stand (Fig. 2) change.
• the delivery line 17 extends beyond the distal end of the third mast arm segment 22, so that the liquid concrete can be discharged in an area remote from the concrete pump 15.
• the loads on the mast arm segments 20, 21, 22 in very different Richtun conditions.
• the mast arm is exposed by the intermittent promotion of liquid concrete high dynamic load.
• the pivot joints between the mast arm segments 20, 21, 22 are designed so that they union made a large swing angle. When folded, the mast arm segments are located
• the joint construction is shown in Fig. 4 on the example of the pivot joint between the first mast arm segment 20 and the second mast arm segment 21.
• the hinge axis is formed by a hinge pin 23 through which a proximal end of the mast arm segment 21 is connected to a distal end of the mast arm segment 20. Adjacent to the hinge pin 23, a first toggle lever 24 is struck on the first mast arm segment 20. At the second mast arm segment 21 is adjacent to the hinge pin 23, a second articulated lever 25 angeschla conditions.
• the two articulated levers are hinged together at 26.
• a hydraulic cylinder 27 extends from a pivot point 28 on the first Mastarm segment 20 to äuße ren end of the first articulated lever 24.
• About the articulated levers 24, 25 is a lifting movement of the hydraulic cylinder 27 in a pivoting movement between the mast arm segments 20, 21 via puts .
• a mast arm segment 30 according to the invention shown in FIG. 3 extends from a proximal end 31 to a distal end 32.
• the mast arm segment 30 is designed as a box-shaped profile with a top flange 33, a bottom flange 34 and two side parts 35, 36 Near the proximal end 31, a hinge hole 37 is formed.
• the joint bore receives the hinge pin 23, which connects the mast arm segment 30 with a be adjacent Mastarm segment.
• a stud bolt 38 is arranged, on which the articulated lever 25 is connected.
• a reinforcing plate 40 surrounds the hinge bore 37 and the stud bolt 38, so that the particularly large forces occurring in this area can be safely taken on men.
• the mast arm segment 30 includes near its distal end a further joint bore 37 and a further stud bolt 38 to which a hinge lever 24 can be connected.
• a reinforcing plate 40 surrounds the hinge bore 37 and the stud 38.
• Corresponding ampli kungsbleche 40 are formed on the opposite side portion 36 of the mast arm segment 30, which is not visible in Fig. 3.
• the box-shaped profile of the mast arm segment tapers continuously from the proximal end 31 to the articulation point 28 for the hydraulic cylinder.
• the two side parts 35, 36 as well as the upper belt 33 and the lower belt 34 thus approach each other with increasing distance from the proximal end 31. each other.
• the taper is still quite clear in the region of the joint bore 37, in the further course of the continu ously taper continues to a reduced extent, so that the cross-sectional change in Fig. 3 is barely perceptible.
• the mast arm segment comprises between the proximal end 31 and the articulation point 28 two longitudinal connections 44, 45.
• the longitudinal connection 44 is between a first portion 41 and a second portion 42 of the mast arm segment angeord net
• the longitudinal connection 45 is rich between the second Operabe 42 and a third portion 43 of the mast arm segment arranged.
• the upper flange 33 and the lower flange 34 have a material thickness of 10 mm in the first partial region 41, a material thickness of 8 mm in the second partial region 42 and a material thickness of 6 mm in the third partial region 43.
• the sub-profiles 51, 52 are each made of 10 mm thick sheet steel.
• the partial profile 51 comprises two side part sections 53, which are bent over a belt section 56 by 90 °.
• the sub-profile 52 comprises two side sections 54 which are folded relative to a belt portion 57 by 90 °.
• At their end faces are the soteilab sections 53, 54 by welds abutting each other a related party, so that a rectangular cross-section box-shaped profile is formed.
• the box-shaped profile of the Mastarm- segment in the second portion 42 of two sub-profiles 61, 62 is composed.
• the sub-profiles 61, 62 are each made of 8 mm thick steel sheet.
• the partial profile 61 to summarizes two side sections 63, the section against a strap 66 are bent by 90 °.
• the sub-profile 62 comprises two side sections 64, which cut from a Gurtab 67 are bent by 90 °.
• the side panel sections 53, 54 are joined together by butt welds so that a box-shaped profile of rectangular cross-section is formed.
• the box-shaped profile of the first portion 41 coincides with the box-shaped profile of the second portion 42, so that the two portions 41, 42 can be interconnected by a circumferential weld in the transverse direction.
• a reinforcing plate 46 is welded with a circumferential weld from the outside on the side part sections 54, 64 and extends over the longitudinal connection 44 of time. Starting from the area of the longitudinal connection 44, the reinforcing plate 46 tapers toward its two ends. In the region of the longitudinal connection 44, the reinforcing plate 46 extends to the edge to the belt portion 57, 67 zoom. The two ends of the reinforcing plate 46 are spaced from this edge.
• a similarly designed reinforcing plate 47 is welded onto the side part sections 53, 63 and also extends over the longitudinal connection 44 away. In the alternative embodiment according to FIGS.
• the side part sections 53, 54 of the sub-profiles 51, 52 as well as the side part sections 63, 64 of the sub-profiles 61, 62 are substantially shorter.
• two side plates 58, 59 are welded, which compared to the part profiles 51, 52 have a 50% reduced material thickness.
• the side plates 58, 59 therefore have a thickness of 5 mm. Accordingly, between the side part sections 63, 64 in the second portion 42 of the
• Mast arm segment side plates 68 welded.
• the soble surface 68 have a thickness of 4 mm.
• the reinforcing plates 46, 47 extend beyond the edge of the soteilab sections 53, 54, 63, 64 and also overlap with the side plates 58, 59, 68th
• the two side parts of the mast arm segment are each provided with an outwardly projecting bead 70.
• the two belt surfaces are each provided with an inwardly facing bead 71.
• the reinforcing plate 47 arranged in the upper region is thicker than the bead 70.
• the reinforcing plate 47 has a material thickness reduced on its inner side, so that the outer side of the reinforcing plate 47 forms a flat surface .
• the arranged in the lower region of the reinforcing plate 46 has a smaller thickness than the bead 70 and ends on the inclined surface of the bead 70.
• the side surfaces are each provided with two beads 72, 73 instead of the single bead 70 ,
• a Ver reinforcing plate 74 extends over the entire width of the mast arm segment and overlaps with the upper portion of the twocominglie ing side parts in the manner of a cuff.
• Fig. 12 is an embodiment shown in which the reinforcing plate 47 protrudes upward beyond the contour of the Mastarm segment.
• two reinforcement plates 75 are arranged on the belt surface and extend over the longitudinal connection 44 between the belt sections 56, 66.
• the reinforcing plates 75 project upwardly against the belt portions 56, 66, so that the extension of the boom arm segment is increased in the vertical right direction by the reinforcing plates 75.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2017
  • 2017-12-19 DE DE102017223240.4A patent/DE102017223240A1/de active Pending
• 2018
  • 2018-12-18 KR KR1020207018680A patent/KR102614228B1/ko active IP Right Grant
  • 2018-12-18 JP JP2020532721A patent/JP2021508360A/ja active Pending
  • 2018-12-18 EP EP18826599.5A patent/EP3728760A1/de active Pending
  • 2018-12-18 WO PCT/EP2018/085418 patent/WO2019121632A1/de unknown
  • 2018-12-18 CN CN201880082004.5A patent/CN111512007B/zh not_active Expired - Fee Related
  • 2018-12-18 US US16/956,055 patent/US20200370314A1/en active Pending

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