EP1489248A2 - Ausziehbarer Gerüstquerbalken - Google Patents

Ausziehbarer Gerüstquerbalken Download PDF

Info

Publication number
EP1489248A2
EP1489248A2 EP04076472A EP04076472A EP1489248A2 EP 1489248 A2 EP1489248 A2 EP 1489248A2 EP 04076472 A EP04076472 A EP 04076472A EP 04076472 A EP04076472 A EP 04076472A EP 1489248 A2 EP1489248 A2 EP 1489248A2
Authority
EP
European Patent Office
Prior art keywords
scaffolding tube
scaffolding
profile
tube profile
saddle
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP04076472A
Other languages
English (en)
French (fr)
Other versions
EP1489248A3 (de
Inventor
Hubertus Jacobus Petronella Van Der Linden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scafom International BV
Original Assignee
Scafom International BV
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
Priority claimed from NL1023501A external-priority patent/NL1023501C1/nl
Application filed by Scafom International BV filed Critical Scafom International BV
Publication of EP1489248A2 publication Critical patent/EP1489248A2/de
Publication of EP1489248A3 publication Critical patent/EP1489248A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • 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
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/02—Connections between parts of the scaffold with separate coupling elements
    • E04G7/06—Stiff scaffolding clamps for connecting scaffold members of common shape
    • E04G7/12—Clamps or clips for crossing members
    • E04G7/14—Clamps or clips for crossing members for clamping the members independently
    • 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
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • E04G7/303—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect
    • E04G7/304—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect with tying means for connecting the bars or members
    • 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
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • E04G7/303—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect
    • E04G7/305—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect without tying means for connecting the bars or members
    • 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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G2001/157—Extensible platforms, e.g. telescopic platforms

Definitions

  • This invention relates to a device for use in scaffolding construction comprising a first scaffolding tube wherein a telescopically second scaffolding tube profile is received.
  • a device is also known as a so-called extendible scaffolding transom as described in GB2374895.
  • a second scaffolding tube profile is described that is lockable and longitudinally telescopically mounted slidably inside the first scaffolding tube.
  • the first scaffolding tube, together with the positioned second scaffolding tube profile may be used in scaffolding construction by mounting the first scaffolding tube in a horizontal plane.
  • the known telescopic second scaffolding tube profile is provided with an open V-shaped profile in cross-section which comprises some disadvantages.
  • scaffolding elements which are of light-weight and also comprise a high mechanical strength.
  • Object of the invention is to provide for an improved profile for the second tube profile, which comprises a high mechanical strength and a great resistance against bending and shear and which is light-weight and easily manufactured.
  • the device according to the invention is characterized in that a first scaffolding tube, interiorly provided with a second, in cross-section polygonally closed scaffolding tube profile longitudinally telescopically fitted mounted in such a way that the interior circumference of the first scaffolding tube is in touching contact with angle segments defined by shape between mutually distantly positioned circumferential parts along the outward circumference of the second scaffolding tube profile, these angle segments mutually enclosing an angle in a circumferential direction, the value of which is determined by 360° divided by the number of angle segments.
  • An embodiment according to the invention is characterized in that each of the angle segments in a circumferential direction enclose an angle of 90°. It appears that this shape of the second scaffolding tube profile may be easily and cheaply rolled, whereas this profile comprises a high bending and shear strength. Moreover this profile leaves enough space between the exterior of the second scaffolding tube profile and the interior of the first scaffolding tube, so that dirt drawn or blown, may be easily removed so that reliable stop and/or locking means may be mounted to lock the extendable part within the first scaffolding tube.
  • Another embodiment of the device for use in scaffolding construction is characterized in that the position of the second scaffolding tube profile inside the first scaffolding tube is suchlike that in a cross-section the diagonal connecting lines between each two opposite angle segments upon the second scaffolding tube profile are perpendicularly intersecting each other.
  • a profile regularly configured this way may be easily telescopeble in and outward and in use is supported in a regular and stable manner with its angle segments against the interior of the first scaffolding tube.
  • Another embodiment of the device is characterized, in that in its mounted position of the first scaffolding tube for a scaffolding construction the first diametrically extending angle segments of the second scaffolding tube profile are extending along a vertical plane with respect to the interior circumference of the first scaffolding tube whereas the perpendicularly positioned second angle segments of the second scaffolding tube profile are extending diametrically along a horizontal plane.
  • the extended second scaffolding tube profile is less susceptible to become polluted during use e.g. on a construction site. Because an angle segment of the second scaffolding tube profile is pointing upwards, contamination like e.g. by dust or building mortar, will less easily stick and will slide downwards over the slanting side walls adjacent to the upwardly pointing angle segment of the second scaffolding tube profile.
  • the device is characterized in that the closed second scaffolding tube profile comprises in a cross-section a square tube profile having a substantially constant wall thickness and having rounded of angles.
  • the device is characterized in that the radius of curvature of the rounded off angles of the second scaffolding tube profile at the location of its contact nearly conforms to the interior radius of curvature of the first scaffolding tube.
  • a second scaffolding tube profile is obtained with flattened or rounded off angles having a greater interior diameter between two opposite sides, then when applying right angles.
  • Increasing the exterior diameter at a constant material thickness does increase the bending and shear strength of the second scaffolding tube.
  • an optimal rounding off or flattening is obtained of the second scaffolding tube profile so that it will posses an improved bending and shear strength.
  • a preferred embodiment is characterized in that the ratio of the length of the interior diameter between two opposite angles in relation to the length of the interior diameter between two opposite sides of the second scaffolding tube profile is between about 1.40 and 1.05. In a further preferred embodiment the ratio of the exterior diameters is between 1.3 and 1.2 and in a more preferred embodiment the ratio is 1.25. It appears that for this ratio there is an optimum in the bending and shear strength of the second scaffolding tube profile with respect to the free space between the first and the second scaffolding tube needed for the locking means and with respect to easy telescoping.
  • a preferred embodiment is characterized in that the wall thickness is about 3 mm, that the interior diameter between two opposite sides is about 32.3 mm and that the exterior diameter between two opposite angles is about 40.4 mm.
  • the device is characterized in that the closed second scaffolding tube profile consists in a cross-section of a square, each opposite side comprises a vault in its cross-section in relation to the centre of the profile.
  • the sides of the second scaffolding tube profile are completely or partially convexly or concavely curved.
  • the closed second scaffolding tube profile in cross-section consists of a square all sides of which are concavely curved. More preferably all sides are concavely curved. More preferably each two opposite sides are concavely curved and the other opposite sides are convexly curved
  • the angle segments of the second scaffolding tube profile enclose an angle of 120° in circumferential direction.
  • the closed second scaffolding tube profile is a triangle with rounded angles in cross-section. With respect to the V-shape in GB2374895 an improved bending and shear strength is obtained.
  • a preferred embodiment is characterized in that the first scaffolding tube is provided at its end where the second scaffolding tube profile is mounted, with a fixing means for fixation of the direction of orientation of the angle segments of the second scaffolding tube profile.
  • the fixing means consists of a cover sheet extending in a radial plane of the first scaffolding tube, the cover sheet being provided with an opening, having a cross-sectional profile which is similar in shape and of a greater dimension then the cross-sectional profile of the second scaffolding tube profile, in such a way, that the second scaffolding tube profile is tightly enclosed by the cover sheet and is freely slidable in and out of the first scaffolding tube through the cover sheet.
  • This cover sheet has the advantage that the amount of dirt drawn in or blown in is reduced strongly and that also on the second scaffolding tube profile the deposited dirt is scraped off during telescoping inwards of the second scaffolding tube profile.
  • this cover sheet may be used as an abutment sheet to prevent the second scaffolding tube profile telescoping too far outside the first scaffolding tube.
  • a preferred embodiment is characterized in that the first scaffolding tube is provided with connecting means for interconnecting with the vertical leg members of the scaffold, which means are mounted in such a way that in its mounted position of the first scaffold tube a diagonal between opposite angle segments of the opening of the cover sheet is extending in a vertical plane.
  • a preferred embodiment is also characterized in that the second scaffolding tube profile is provided on at least one side with a protruding catch, to such an extent protruding beyond this side, that the catch cannot be displaced past the cover sheet, thus giving protection against undesirable exceeding of the maximum extension length.
  • An alternative embodiment is characterized in that a stop catch or stop sheet is provided onto the telescoping part of the second scaffolding tube profile for determining a restriction of the telescoping distance of the second scaffolding tube profile into the first scaffolding tube.
  • a further embodiment is characterized in that as a connecting means there is a coupling device having a coupling housing that on its one side is provided with a first saddle element fixedly connected with the first scaffolding tube, and further at its opposite side being provided with a fixed second saddle element to be releasably connected by means of a wedge to a girder perpendicularly positioned thereto, whereby this second saddle element being provided with a hinging saddle clamp element hingeable mounted around a hinge pin in the coupling housing that together with the second saddle element spans over least 180° of the girder circumference whereas the coupling housing and the saddle clamp element are both provided with an abutting surface for a hollow wedge-shaped locking member the tapered end of which being movably connected to a recess which is located on a rib on the back side of the saddle clamp element, whereby the locking member along its whole length, except for each of its both ends, is provided with a continuous slot in which a bracket is positioned, mounted on said rib.
  • a scaffolding construction 1 is shown assembled in a well known manner from upright pole 2 and interconnected girders 3.
  • girders 3 Upon girders 3 are mounted transverse girder or transom 4 in a horizontal plane perpendicularly to the longitudinal axis through girders 3 by means of connecting means 18 like a separate scaffolding clamp or a connecting means fixedly mounted upon the first scaffolding tube like a bracket or a half scaffolding clamp. Parallel and at a certain distance in relation to this transom 4 more transoms may be mounted (not shown).
  • transoms 4 positioned support planks 5 parallel to the longitudinal axis of girders 3 in a horizontal plane.
  • the support planks are positioned closely adjacent to each other so that they form a floor whereupon safely may be walked or worked by a person.
  • the transom 4 in this example is a so-called extendable scaffolding transom.
  • An extendable scaffolding transom is a transom provided with an telescoping scaffolding tube.
  • the extendable scaffolding transom so consists of two parts: a first scaffolding tube 6 and an in- and outwardly of this scaffolding tube telescoping second scaffolding tube profile 7.
  • this second scaffolding tube profile 7 is thus far telescoped out and extended outside the scaffolding construction that three support planks may be mounted parallel to the other support beams for forming a walking of working floor.
  • the length y of the transom is about 1400 mm
  • the length x of the telescoping second scaffolding tube profile is about 850 mm.
  • Fig.2 there is shown a detailed extendable transom 4 with a first hollow scaffolding tube 6 and a second hollow scaffolding tube profile 7.
  • a portion 7' of the second scaffolding tube profile 7 is received in first scaffolding tube 6 and a portion 7" is positioned outside scaffolding tube 6.
  • Second scaffolding tube profile 7 may be telescoped into first scaffolding tube 6 in the direction of arrow P, so that portion 7' increases within first scaffolding tube 6 and portion 7" decreases outside first scaffolding tube 6.
  • the length x of the second scaffolding tube profile is about 850 mm
  • the maximum telescoping length z is about 650 mm
  • the minimum length of the remaining portion 7' within the first scaffolding tube is about 200 mm.
  • first scaffolding tube 6 may be provided with locking means , like e.g. an opening 9, to prevent that second scaffolding tube profile 7 is telescoped outwardly too far. Opening 9 may be used for or cooperate with e.g. mounting or removing locking means in the second scaffolding tube profile like e.g. a stop catch 16.
  • the first scaffolding tube 6 at its end, where the second scaffolding tube profile is positioned, is provided with cover sheet 17, having the functions of a stop sheet, a dirt scraper and protector against contamination.
  • FIG.3 a cross-sectional view is shown of an extendable scaffolding transom 4 with first scaffolding tube 6 and an interiorly mounted second scaffolding tube profile 7.
  • First scaffolding tube 6 is mounted upon girder 3 by means of connecting means 18.
  • Second scaffolding tube profile 7 is oriented in such a way that in use in a scaffolding construction an angle 10 is pointing upwards and the opposite angle 10 is pointing downwards, while the two remaining angles 13 are positioned in an horizontal plane.
  • first scaffolding tube 6 has a thickness e of about 3.2 mm and may be a standard scaffolding tube with an exterior diameter f of about 48.3 mm.
  • the interior diameter c is in this example about 41.9 mm.
  • the second scaffolding tube profile 7 is having rounded off angles 10 and is e.g. manufactured by rolling from a piece material with a thickness d of about 3 mm into a closed scaffolding tube profile with thickness d of about 3 mm.
  • the exterior diameter a between both opposite sides 11 and also between both opposite sides 12 amounts to about 32.3 mm in this example, so that the second scaffolding tube profile comprises a square shape.
  • the radius of curvature of the rounded off angles 10 and 13 corresponds to the interior radius of curvature of the first scaffolding tube 6, as a result of which an optimal telescoping scaffolding tube is formed having a high bending strength, being telescopically far extendable and being easily inwardly telescopable.
  • the external diameter b between both opposite angles 10 is in this example about 40.4 mm.
  • the first scaffolding tube 6 is provided in this example with opening 9 and the second scaffolding tube profile 7 is provided with openings 14 and 15. These openings may be used for locking of the second scaffolding tube profile into the first scaffolding tube e.g. with stop catch 16 which may be mounted in the openings from the outside.
  • Fig.4A is shown in a cross-section a stop catch 16, which is mounted in de openings 14 and 15 of the second scaffolding tube profile 7.
  • the stop catch protrudes beyond side 11, but is not extending beyond the interior circumference of the first scaffolding tube 6 so that the second scaffolding tube profile may be freely displaced by sliding in the first scaffolding tube.
  • the end of first scaffolding tube 6, where in the second scaffolding tube profile is located, may be provided with a fixing means for fixation of the direction of orientation of the angle segments and as a result of the position of the second scaffolding tube profile.
  • the fixing means is performed as a cover sheet.
  • Fig.4B shows a cover plate 17 in a cross-sectional view.
  • Cover plate 17 is mounted upon the end of first scaffolding tube 6.
  • Cover plate 17 is provided with an opening which is similar in shape and dimensions to a cross-section of the second scaffolding tube profile 7, but in the dimension h between the opposite sides just somewhat greater then the exterior diameter a between de opposite sides 11 and 12, so that the cover sheet 17 closely encloses around the second scaffolding tube profile 7 and as a result of which blowing in of dirt from the outside is prevented and also the cover sheet removes dirt located on the portion of the second scaffolding tube profile 7" by scraping it off of during inward telescoping.
  • Cover sheet 17 in Fig.4B is fixedly mounted upon the end of first scaffolding tube 6; as shown with a dotted line in Fig.3, so that in cooperation with the fixedly mounted connecting means 18 is secured that the second scaffolding tube profile 7 in its mounted position within the first scaffolding tube 6 always is telescoping outwards in its position with an angle pointing upwards. Moreover the cooperation of cover sheet 17 with stop catch 16 results in reducing the length portion of the second scaffolding tube profile which may be telescoped beyond the first scaffolding tube.
  • stop catch 16 extends beyond the closely enclosed profile of the second scaffolding tube profile 7 the covered by cover plate 17 the stop catch 16 will make contact with cover plate 17 when second scaffolding tube profile is extended too far, so that as a result second scaffolding tube profile cannot be telescoped outwardly any further.
  • the stop catch may also be mounted upon another side of the second scaffolding tube profile or if desired upon more sides.
  • the stop catch may be e.g. mounted and removed by opening 9 provided for in first scaffolding tube 6. It is also possible for finger protection to provide a stop catch or stop sheet in the first scaffolding tube as a distance restriction to prevent telescoping inwardly too far of the second scaffolding tube profile and to prevent trapping of fingers.
  • the end of the second scaffolding tube profile located inside the first scaffolding tube contacts the stop catch or stop sheet extending into the first scaffolding tube, thus leaving free space, e.g. corresponding to the thickness of a finger, between the ends of the first scaffolding tube and the second scaffolding tube profile.
  • the end of the first scaffolding tube may be deformed into an end profile similar to the profile of the second scaffolding tube profile, so that in similarity with cover plate 17 the second scaffolding tube profile 7 is closely enclosed by the end profile and the second scaffolding tube profile is telescoped always with an angle pointing upwards in and out of the first scaffolding tube.
  • the end of the first scaffolding tube may be provided with e.g. a square end profile by means of mechanical deformation of the scaffolding tube like by pressing or reduction by means of a by a mandrel during the pressing step brought into the hollow space of the first scaffolding tube.
  • Fig.5 an embodiment of the transom 4 of the invention is shown comprising a first scaffolding tube 6 and a second scaffolding tube profile 7 with two coupling devices 100 which are provided upon the first scaffolding tube 6 for mounting transom 4 upon two girders 3.
  • Coupling device 10 comprises at least one coupling housing 101, a saddle clamp element 106 and a wedge-shaped locking member 108.
  • both coupling devices 100 are fixedly connected with first scaffolding tube 6 e.g. by means of welding.
  • the coupling devices are mounted in such a way, that the sides of the coupling devices, provided with locking members 108, are facing each other, as shown in Fig.5. By positioning the locking members 108 in this way on the inside of the coupling devices they are less easily accidentally driven out or they are less easily polluted with building products like mortar and the like.
  • Figs.6A,B,C and 7A,B,C the coupling devices 100 are shown in detail in an open and closed position.
  • Fig.6A and 6B show a first saddle element 102 on the top side of the coupling housing 101 provided for connecting the coupling device 100 with scaffolding tube 6.
  • This saddle element 102 in this example consists of a coupling housing 101 comprising two parallel side sheets 112, which are flat and straight at their top sides and which are interconnected by means of a transverse connection forming turned over parts of the side sheets 112 welded together forming connecting sheet 113.
  • Preferably connecting sheet 113 is not extending completely until the top side of the side sheets in order to leave an opening free for receiving the circular profile of scaffolding tube 6.
  • both side sheets are turned over into two turned over parts 114.
  • the coupling housing 101 is on its opposite side of the first saddle element 102 provided with a second saddle element 103 for receiving girder 3.
  • This second saddle element 103 consists in this embodiment of a circular recess 116 and a saddle clamp element 106 which together span at least 180° of the girder circumference.
  • Coupling housing 101 is provided with hinge pin 105 which is extending parallel to the girder 3 to connect there to. Over this hinge pin 105 saddle clamp element 106 is hingedly mounted by means of a hinge opening.
  • the saddle clamp element 106 is further provided with a recess or opening 109 wherein a wedge-shaped locking member 108 is mounted by means of bracket 111.
  • Recess 109 forms on its bottom side abutting surface 117 of saddle clamp element 106.
  • On the bottom side of the side sheets 112 of the coupling housing 101 are also abutting surfaces 107 formed adjacent to abutting surface 117 of saddle clamp element 106.
  • the wedge-shaped locking member 108 in this embodiment is shaped as a hollow wedge-shaped body provided with a slot 110. Fig.
  • FIG. 7C shows that locking member 108 has a U-shaped profile
  • Fig.7B shows that in side view the locking member is provided with a tapered end 115 and that this small end 115 is not releasably connected to saddle clamp element 106 by means of a welded bracket 111 on the saddle clamp element 106.
  • the coupling housing 101 is further provided with a spread spring 118, which in this embodiment engages scaffolding tube 6 with one leg and which engages saddle clamp element 106 with its other leg in such a way, that when saddle clamp element 106 is not fixed by means of locking member 108, the spread spring will freely move and retain the saddle clamp element into its open position.
  • the coupling device is operated as follows: Fig.7C shows that preceding the coupling operation with girder 3 locking member 106 is locked up between the turned over parts 114 of side sheets 112 when the transoms are in their stacked position, the coupling device being on the top side and the scaffolding tube 6 being on the bottom side. Fig.7C shows that the legs of the U-shape of the wedge-shaped locking member are pointing downward and are locked up between the turned over parts 114.
  • the locking members will less easily bend or deform because they are well protected and locked up in stacked position during e.g. transport.
  • the transom In order to mount the transom it is firstly turned over from its stacked position into the coupling position with the coupling pointing downwards.
  • the locking member 108 will now hang free downwardly as shown in Fig.7B. Because locking member 108 is not inserted between the abutting surfaces 107, 117 of the saddle clamp element 106 and the side sheets respectively, the saddle clamp element 106 is retained in the open position by spread spring 118; see Fig.7B.
  • the open saddle clamp element 106 allows easy mounting of the transom upon the girders of a scaffold construction.
  • the saddle clamp element 106 is moved to girder 3, against the spring pressure of spread spring 118, see Fig.7B and 6B.
  • the locking member 108 By inserting the locking member 108 further between abutting surfaces 107 and 117, e.g. by hitting it with a hammer on the broad end 119 for further driving the member in the direction of arrow I in Fig.6C, the saddle clamp element 106 will clamp together the girder 3 into second saddle element 103.
  • the lever arm formed between hinge point 105 and abutting surface 117 a great clamping force is exerted by the wedge-shaped locking member on girder 3.
  • the locking member 108 When the connection of the transom and the girder should be released firstly the locking member 108 is removed from its clamping position between abutting surfaces 107 and 117. This may be done by hitting it with a hammer on the small tapered end 115 , in the direction of arrow V in Fig.6C, so that the locking member 108 is driven out. When the locking member 108 is completely released from the abutting surfaces 107 and 117 the locking member 108 will rotate over 90° and will hang free downwardly, as shown in Fig 7B. As a result the spread spring 118 will move the saddle clamp element 106 away from the girder, so that the transom 4 may be easily removed from the girders 3.
  • the hanging free locking member is locked up between the turned over parts 114, so that the locking member is not protruding outside the transom making the transoms easily stackable.
  • Fig.8A,B,C an alternative embodiment is shown of the coupling device 100.
  • the coupling device in Fig.8A,B,C has been given reference number 200, all other features have been given reference numbers in the 200 series corresponding to the reference numbers of Fig.6A,B,C.
  • the locking member 208 is rotated over 90° with respect to the locking member 108 shown in Fig.6A causing the legs of the U-shaped locking member to extend in the reversed direction with respect to girder 3.
  • bracket 211 is principally U-shaped and may be easily mounted, e.g. by welding, onto saddle clamp element 206.
  • abutting surface 217 is formed by a protruding element provided in the centre of saddle clamp element 206, in this example in the shape of a cubical body, as a result of which a vertical abutting surface 217 is formed.
  • the abutting surfaces 207 on side sheets 212 are also parallelly extending to abutting surface 217 in a vertical direction, so that by means of inserting the locking member 208 between the abutting surfaces 207 and 217 the saddle clamp element 206 is moved in the direction of girder 3, against the spring pressure of spread spring 218.
  • arrow I indicates the direction of driving in or hitting of the wedge-shaped locking member
  • arrow V indicates the direction of driving in or hitting out.
  • the broadening of the wedge-shaped locking member 208 during driving in causes a direct displacement of the saddle clamp element 206 in the direction of girder 3 so that with this embodiment a higher clamping force more easily is exerted on girder 3.
  • the lever arm formed between hinge point 205 and the abutting surface 217 is greater than in Fig.6A,B,C so that by means of the wedge-shaped locking member 208 more easily a higher clamping force is exerted on girder 3.
  • Other variations in the orientation of the abutting surfaces 107, 207, 117, 217 and of the locking member 108, 208 fall within the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP04076472A 2003-05-22 2004-05-19 Ausziehbarer Gerüstquerbalken Withdrawn EP1489248A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1023501A NL1023501C1 (nl) 2003-05-22 2003-05-22 Uitschuifkorteling.
NL1023501 2003-05-22
NL1024541 2003-10-15
NL1024541A NL1024541C1 (nl) 2003-05-22 2003-10-15 Uitschuifkorteling.

Publications (2)

Publication Number Publication Date
EP1489248A2 true EP1489248A2 (de) 2004-12-22
EP1489248A3 EP1489248A3 (de) 2005-11-16

Family

ID=33422320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04076472A Withdrawn EP1489248A3 (de) 2003-05-22 2004-05-19 Ausziehbarer Gerüstquerbalken

Country Status (2)

Country Link
EP (1) EP1489248A3 (de)
NL (1) NL1024541C1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1922492A1 (de) * 2005-09-09 2008-05-21 Notool AB Verbindungsvorrichtung
EP2025832A1 (de) * 2007-08-10 2009-02-18 Alpine Bau Deutschland AG Längenveränderliche Arbeitsbühne, insbesondere für Kletterrüstungen
GB2494379A (en) * 2011-08-17 2013-03-13 Graham Fogarty Telescopic scaffolding transom
WO2024013611A1 (en) * 2022-07-15 2024-01-18 Magirus Gmbh Improved rescue stretcher assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374895A (en) 2001-04-28 2002-10-30 Lyndon Scaffolding Plc Extendible scaffold transom

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1032140A (fr) * 1951-02-07 1953-06-30 étais métalliques
US3547475A (en) * 1967-11-03 1970-12-15 Carl E Gingher Valet rack post
DE1909499A1 (de) * 1969-02-26 1970-09-10 Alfred Schoenfeldt Verlaengerungsstueck fuer Rohrgerueststiele
DE3218046A1 (de) * 1982-05-13 1983-11-17 Wolfgang 7958 Laupheim Baumann Geruest, insbesondere baugeruest
JP2593791B2 (ja) * 1993-11-25 1997-03-26 辰雄 小野 支柱の長さ調整装置
DE29805935U1 (de) * 1997-09-22 1998-07-30 Mannesmann AG, 40213 Düsseldorf Gerüstbaurohr mit höhenverstellbarem Fuß

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374895A (en) 2001-04-28 2002-10-30 Lyndon Scaffolding Plc Extendible scaffold transom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1922492A1 (de) * 2005-09-09 2008-05-21 Notool AB Verbindungsvorrichtung
EP1922492A4 (de) * 2005-09-09 2009-11-18 Notool Ab Verbindungsvorrichtung
EP2025832A1 (de) * 2007-08-10 2009-02-18 Alpine Bau Deutschland AG Längenveränderliche Arbeitsbühne, insbesondere für Kletterrüstungen
GB2494379A (en) * 2011-08-17 2013-03-13 Graham Fogarty Telescopic scaffolding transom
WO2024013611A1 (en) * 2022-07-15 2024-01-18 Magirus Gmbh Improved rescue stretcher assembly

Also Published As

Publication number Publication date
NL1024541C1 (nl) 2004-11-24
EP1489248A3 (de) 2005-11-16

Similar Documents

Publication Publication Date Title
US6908250B2 (en) Retainer for retaining collapsed poles within another pole
US20090230256A1 (en) Adapter for stacking cable hangers
CA2905908C (en) Universal wedge clamp
US10533329B2 (en) Lockable scaffold toeboard system
NL9100139A (nl) Afsteunelement voor toepassing in bouwconstructies.
CA1170694A (en) Scaffolding structure
EP1116458A1 (de) Tritthocker
EP1489248A2 (de) Ausziehbarer Gerüstquerbalken
US20050121261A1 (en) Adjustable stepladders and related methods
US10995503B2 (en) Lockable scaffold toeboard system using sleeves
EP1134332A1 (de) Anschlussklemme zur Verbindung von Stützenelementen
US20050115767A1 (en) Extensible, self locking platform and method of using same
KR200389363Y1 (ko) 건축공사용 안전망 구조물
CA2287040A1 (en) Back railing
NL1017813C2 (nl) Klem voor het koppelen van een kantplank aan een steigerbuisconstructie, alsmede een steigerbuisconstructie voorzien van dergelijke klemmen.
US4391348A (en) Scaffold safety pin
US5615751A (en) Scaffold system used with wood panels
NL1023501C1 (nl) Uitschuifkorteling.
KR200448932Y1 (ko) 우마 사다리
NL1015679C2 (nl) Randbeveiligingssysteem voor het beveiligen van randen van een gebouw.
US6447201B1 (en) Quick load relief coupler
US20070240938A1 (en) Ladder having improved mobility
NL1012857C2 (nl) Steiger.
US10844888B2 (en) Clamp for connecting ledger to shoring post
KR102131807B1 (ko) 롤러가 구비된 사다리 고정장치

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20060517