Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
  • E01C19/50—Removable forms or shutterings for road-building purposes; Devices or arrangements for forming individual paving elements, e.g. kerbs, in situ
  • E01C19/502—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes
  • E01C19/504—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes adapted to, or provided with, means to maintain reinforcing or load transfer elements in a required position
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F21/00—Implements for finishing work on buildings
  • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
  • E04F21/04—Patterns or templates; Jointing rulers
  • E04F21/05—Supports for jointing rulers

Definitions

• the present invention relates to a method and an appara- tus for forming a path for a screeding means and speci ⁇ fically relates to a method and an apparatus for forming a path for a screeding means, such as a vibrating screed or the like being used for the direct smoothing of single-course structural floors, said path being adjust- able in height.
• the apparatus comprises a foot or base having " a support for an elongated screeding beam mounted thereon, said support being adjustable in height.
• the invention is especially applicable in connection with casting larger single-course structural floors, such as industrial floors which may have an area of up to
• the object of the present invention is to provide a method and an apparatus of the kind indicated in the introduction, by means of which the above described disadvantages of the known technique may be eliminated to the greatest possible extent and which specifically permit easy adaption to floors having diffe ⁇ rent thickness.
• the apparatus shall be com ⁇ paratively inexpensive to manufacture.
• Fig. 1 in a side view and partially in section illustrates a completed path for a screeding means in accordance with the invention and in a first embodiment for floors without reinforcement,
• Fig. 2 is a partial view illustrating the embodiment according to Fig. 1 in a front view, 4
• Fig. 3 in a side view and partially in section illustrates a completed path for a screeding means in accordance with the invention and in a second embodiment for floors with reinforcement, 5
• Fig. 4 is a partial view illustrating portions of the embodiment of Fig. 3 in a front view
• Fig. 5 is a side view of the foot according to the inven- 10 tion, with an adjustable support means mounted
• Fig. 6 illustrates the foot according to the invention as viewed from the left in Fig. 5,
• Fig. 7 is a top view of the foot of Fig. 5, and
• Fig. 8 is a partial view of a screeding beam for use in connection with casting floors with reinforcement.
• the apparatus comprises a base or foot 1
• base plate 30 consisting of a base plate 2 intended to support the apparatus on the ground and, in the illustrated embodi ⁇ ment, having a rectangular shape and being manufactured from for instance flat bar steel.
• shape of the base plate may be varied and it should only have
• the base plate may be 100 mm wide, 180 mm long and 5 mm thick.
• a guide tube 3 is removably attached to the upper side of the base plate 2, substantially in a central position thereon.
• the removable attachment is achieved by welding a nut 4 to the lower end of the tube 3, whereupon the nut may be screwed onto a threaded pin 5 (only indicated in Fig. 5) extending up through the upper surface of the base plate 2 and being firmly connected thereto.
• a through bore 6 may be provided adjacent the upper end of the guide tube, so that for instance a screw driver may be pushed in through the bore to facilitate the turning or rotation of the guide tube.
• the nut 4 may alter ⁇ natively be provided inside the lower end of the guide tube.
• this guide tube in the illustrated embodiment has a cylindrical shape
• the guide tube may for instance also have a square cross-section, whereby it is only of importance that those portions of the below described slide tube 7 which co-operatate with the guide tube have a corresponding shape.
• the guide tube 3 is manufactured in different lengths of for instance between 70 and 300 mm and through the above described removable attachment of the guide tube to the base plate the guide tube may be easily replaced for adaption to different thickness of the floors to be cast.
• a slide tube 7 which for permitting an adjustment of the height of the screeding path is manufactured having a cross-sectional shape substantially corresponding to that of the guide tube 3, but having a slightly larger inner dimension than the outer dimension of the guide tube, so that it may be dis ⁇ placed along the guide tube 3.
• a locking device consisting of a locking washer or securing plate 8 having an aperture 9 the inner dimen ⁇ sions of which corresponds to the inner dimensions of the slide tube 7, i.e. such that the securing plate 8 in a substantially horizontal position may be displaced freely along the guide tube 3, but such that it engages and is secured to the guide tube when it is tilted to a position inclined in relation to the horizontal.
• the securing plate 8 is pivotally connected to the slide tube 7 and in the illustrated embodiment this pivotal connection has been achieved by providing the securing plate with two lugs 10 inserted through the corresponding apertures 11 in a support 13 firmly attached to the slide tube 7 and intended to support the actual screeding beam 14.
• the lugs are slightly bent upwardly at their free ends in o'rder not to slip out of the apertures 11.
• the securing plate is connected to the slide tube 7 through a spring 12.
• the spring 12 will normally pull the securing plate 8 to an inclined position for securing the plate and the slide tube 7 in position on the guide tube 3.
• the securing plate 8 In adjus ⁇ ting the position of the slide tube 7 the securing plate 8 is pressed down with a finger to a substantially hori ⁇ zontal position such that the plate and the slide tube may be freely displaced along the guide tube. With this securing structure the slide tube 7 is safely secured in the desired position, and it is also clear that the more the slide tube is loaded the more firmly the securing plate engages the guide tube 3, and thereby a very stable support for the screeding beam and the vibrating screed is achieved.
• a support 13 is welded to the slide tube 7 for supporting the actual screeding beam 14 on an upper, angled portion of the support.
• these different guide tubes may also be combined with different configu ⁇ rations of slide tubes 7 with the upper angled portion of the support 13, extending upwardly past the actual slide tube, having different height. This makes it possible to obtain optimum adaption of the supporting base 1 to the thickness of the floor to be cast.
• Preferably different slide tubes are manufactured, with the support 13 pro- truding for instance 15 mm, 35 mm and 85 mm upwardly past the upper portion of the actual slide tube.
• the screeding beam is in itself provided in two different variants 14, 14' intended for casting floors with re- inforcement and without reinforcement respectively.
• the screeding beam for casting floors without reinforcement is provided with an upper hook-like portion 15 having a first or outer vertical portion 15a intended to grip behind the support 13 in its mounted condition; a second, horizontal position 15b intended to rest on the angled portion of the support 13 and forming the actual scree ⁇ ding path; and a third vertical portion 15c extending down past the outer end of the angled portion of the support 13, whereby the screeding beam 14 is securely maintained in position on the support.
• the screeding beam 14 is provided with a substantially verti ⁇ cal portion 16 connected to the third, vertical portion 15c and forming a casting joint support against which a section of the concrete floor is cast.
• This lower portion 16 of the screeding beam 14 is preferably provided with a longitudinal groove 16a. When casting a section this groove 16a formes a recess (tenon) for the next section to be cast against the first section; this provides a better joint between the sections and also stiffens the actual screeding beam which is preferably manufactured in lengths of 4 meter.
• the lower portion 16 of the screeding beam 14 is also provided with a horizontally angled portion 16b intended to be positioned close to the ground, forming the lower portion of the casting joint support and with its outer end abutting the guide tube for further stabilization of the s creeding beam.
• the screeding beam may also be provided with knock-out punchings 16c in the region of the longitudinal groove 16a. In these punchings there may be provided mortise bolts 16d which are cast into the concrete for further stabilization of the joint.
• the screeding beam 14' for use in casting concrete floors with reinforcement is provided with the same hook-like upper portion 15' as described above, but i s provided with a straight and shorter lower portion 16' intended to cooperate with a casting joint support of a conventional type , which wil l be described more closely below.
• the screeding beam 14' for concrete floors with reinforcement is furthermore, at the lower portion 16 ' thereof , pro- vided with a number of slots 17 extending from the lower, longitudinal edge thereof and a distance up towards the upper portion of the s creeding beam (Fig. 8 ) .
• the s lots 17 are provided along the lower edge at a distance of approximately 100 mm from each other, and are intended to receive reinforcement bars of the top reinforcement of the floor.
• a steel tip 18 is preferably driven down behind the respective base plate " 2.
• the base plate 2 may also be provided with a bore (not shown) in the region of its rear end, through which bore the steel tip is driven down.
• the screeding beam 14 When the support bases 1 are assembled and completed and are positioned and fixed in the described manner the screeding beam 14, likewise selected according to the thickness of the concrete floor, may be hooked to the supports of the slide tubes 7 with the upper hook-like portion 15 abutting and partly gripping the upper portion of the support 13.
• the screeding beam 14 is finally adjusted to the correct height by releasing the locking of the slide tube 7 to the guide tube 3, which is achieved by pressing down the securing plate 8 at its end closest to the spring 12, whereby the slide tube 7 may be freely pushed upwardly or downwardly along the guide tube for the adjustment.
• the securing plate As soon as the securing plate is un ⁇ loaded it engages the guide tube 3 again and thereby secures the slide tube 7 and the screeding beam 14 in the desired position.
• the support bases 1 are removed by actuating the securing plate 8 again, such that the slide tube 7 may be brought down ⁇ wardly along the guide tube 3 until it is free from the screeding beam 14 and such that the complete base 1 may be removed. Finally the screeding beam 14 is also removed from the cast concrete section, whereupon the procedure may be repeated for casting a new section.
• a casting joint support 18 of a conventional type is initially pro ⁇ vided on the bottom reinforcement 19 and is tied thereto.
• a casting joint support normally consists of a flat, elongated plate which may be provided with a longitudinal groove, corresponding to the groove 16a of the screeding beam 14, for forming a recess.
• Angled bars are preferably provided at the rear side of the elongated plate and at a mutual distance of for instance 80 mm along the plate, whereby one leg of the angled bar is connected to the plate and the other leg is extended perpendicularly, rearwardly from the plate.
• a concrete block 20 is also provided under the bottom reinforcement for sealing off the section so that concrete is prevented from leaking out under the reinforcement.
• the support bases 1 are then assembled and completed in the manner described above and are positioned along the position of the casting joint, whereby the mutual dis ⁇ tance between the support bases may vary somewhat depen- ding upon how the reinforcement is laid.
• the support bases 1 are set out at a distance just behind the casting joint support 18 and then the screeding beam is hooked on, and in this case the straight screeding beam 14' is selected, which is provided with slots 17 opening at the lower edge of the beam.
• the top reinforcement 21 is inserted into the s lots 17 and due to the fact that the support bases 1 have been positioned in correct position behind the casting joint support 18 the lower end of the screeding beam 14' will overlap and closely join the upper end of the casting joint support 18 for forming an adequate casting joint support in cooperation therewith .
• the adaption of the screeding beam to the thickness of the floor to be cast is, as in the above described case, carried out by chosing the appropriate guide tube 8 and slide tube 7.
• the screeding beam 14' is preferably manufactured in only one width so that the adaption of the casting joint support to floors having different thickness will be carried out by selec ⁇ ting casting joint supports 18 of different height or width or by cutting off the casting joint supports to the correct height or width.
• the adjustment of the screeding beam to the correct height as well as the removal of the support bases and of the screeding beam is carried out in a manner correspon- ding to that described above.

Landscapes

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

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26660311

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (5)

• 1989
  • 1989-09-13 EP EP19890910684 patent/EP0436595A1/en not_active Withdrawn
  • 1989-09-13 WO PCT/SE1989/000495 patent/WO1990003478A1/en not_active Application Discontinuation
• 1991
  • 1991-03-28 FI FI911545A patent/FI911545A0/fi not_active Application Discontinuation

Patent Citations (5)

Also Published As

Similar Documents

Legal Events