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
  • 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
  • E04G7/306—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect
  • E04G7/307—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect with tying means for connecting the bars or members

Definitions

• the present invention relates to a device for coupling together laterally directed scaffold elements and uprights in a scaffold or the like.
• Coupling devices for scaffolds are found in many different constructions .
• coupling devices which comprise a part belonging to an upright of the scaffold with a plurality of elements projecting radially in different predetermined directions, in which elements belonging to transverse scaffold elements are adapted to be hooked.
• This type of coupling device certainly renders possible an individual coupling together and disconnection of the transverse scaffold elements but these can only be coupled to the upright in certain predetermined directions , usually in four directions at right angles to one another.
• transverse scaffold elements there are known devices with which transverse scaffold elements can be connected to the upright in any desired direction but these are so constructed, on the other hand, that individual disconnection of the transverse scaffold elements is not possible, that is to say that at a coupling point with a plurality of scaffold elements extending transversely in relation to the upright, all these scaffold elements must be coupled to or disconnected from the upright even if it is only desired to disconnect some of the transverse scaffold elements .
• the purpose of the present invention is to eliminate the abovementioned disadvantage in known coupling devices and to provide a device which permits , on the one hand coupling of a transverse scaffold element to an upright in an arbitrary direction out from the up right and on the other hand a coupling together or disconnection independent of other transverse scaffold elements .
• each coupling device is mainly composed of an engagement member which is connected to the upright and is open upwards at least in the position of use, with a wall which extends with spaceing from the upright and which delimits a space situated between the upright and the wall, a hook-shaped member which is situated at least at one end of said scaffold element and which is adapted to be hooked into the engagement member, a first clamping member which is movable in relation to the scaffold element and which comprises one or more clamping surfaces adapted to bear against the upright and/or the engagement member, and another clamping member which is adjustable between a releasing position and a locking position and which is adapted, in the locking position , to be forcibly gripped between the first clamping and the scaffold element so that the clamping member is urged in the direction towards the upright and the scaffold element, is urged in the direction outwards from the upright and as a result is clamped by means of the hookshaped member in the engagement member.
• FIG. 1 shows, in prespective, an exploded view of a coupling device according to the invention in a first embodiment
• Fig. 2 shows a view partially broken away of the coupling device in the coupled state in a somewhat modified embodiment
• Fig. 3 shows the coupling device of Fig. 2 in the partially disconnected state.
• Fig. 4 shows , with a cross-section through an upright included in a scaffold the coupling device from above in the embodiment shown in Figs . 2 and 3
• Fig. 5 shows the coupling device according to the invention in a further modified embodiment
• Fig. 6 shows an example of a scaffold provided with coupling devices according to the invention.
• the coupling device 1 comprises an engagement member, in the example shown constructed as a mainly bowl-shaped member 2 , which belongs to an upright 3 which is included in a scaffold or the like.
• the bowl-shaped member 2 extends round the whole periphery of the upright 3 and forms a substantially axially symmetrical body which delimits a space 4 between the cylindrical wall 5 of the upright and the concave wall 6 of the bowl-shaped member 2 with a spherically curved surface for example.
• the bowl-shaped member is firmly welded to the upright and comprises drainage openings 8 between the welds 7 for the discharge of water, rubbish and the like. These drainage openings 8 can also be used as cleaning holes, in whichcase larger objects can easily be poked . out by means of a screwdriver or the like which is introduced into the openings 8 from below.
• the coupling device 1 according to the invention further comprises a hook-shaped member 9 which projects down from an end portion 10 of a scaffold element 11.
• the scaffold element 11 consists , for example, of an elongated horizontal member which is included in a scaffold 12 which is shown by an example in Fig. 6.
• the hook-shaped member 9 comprises, on the one hand a surface 12 which is substantially adapted in shape to the shape of the wall 5 of the upright 3, and on the other hand a surface 13 which faces away from said surface 12 and which is substantially adapted in shape to the shape of the inner wall 6 of the bawl-shaped member 2.
• a first clamping member 14 which is movable along the end portion 10 of the scaffold element 11 between the hook shaped member 9 and an elongated tube section 15 of which only a portion is shown in Fig. 1 and into which the end portion 10 is inserted for a distance.
• the tube section 15 is , for example; pressed onto the end portion 10 or welded to this .
• the first clamping member 14 comprises mainly two side pieces 16 and two transverse pieces 17, 18.
• the side pieces 16 each comprise a recess 19, adapted to receive the bowl-shaped member 2 in the assembled state, and each of the two clamping surfaces 20, 21, which are adapted to bear against the wall 5 of the upright 3.
• another clamping member 22 which , in the example shown, is constructed in the form of a wedge which is adapted to be introduced into a transverse, through slit 23 in the end portion 10 which is made of a solid metal material, for example steel.
• the wedge 22 has two edges 24, 25 which converge in relation to one another in the downward direction and of which the one edge 24 is adapted to cooperate with the transverse pieces 17, 18 and the other edge 25 is adapted to cooperate with an end surface 27 (see Figs 2 and 3) in the slit 23 in a manner which will be described in more detail below .
• Fig. 2 shows in more detail how the various parts are adapted to cooperate with one another in the coupling device 1 according to the invention in its coupled state.
• the embodiment shown in Figs . 2, 3 and 4 differs from the embodiment 1 only in that the wedge 22 comprises two laterally directed pins 26 which project laterally at each side of the wedge 22 and so form stop elements which strike against the under side of the end portion 10 and so prevent the wedge 22 from being taken out of the slit 23.
• the upper end position of the wedge can be seen from Fig. 3.
• the operation of the coupling device is just the same as the embodiment according to Fig. 1 in the embodiment according to Figs . 2, 3 and 4 while the position of the parts included differs somewhat during coupling and disconnection.
• the wedge 22 is thus completely removed and the clamping member 14 can be displaced sideways in the direction away from the hook-shape member 12.
• a scaffold element for example an elongated part of a scaffold
• the hookshaped member 9 is hooked into the bowl-shaped member 2, after which the clamping member 14 is pushed forwards so that its clamping surfaces 20, 21 bear against the wall 5 of the upright 3.
• the transverse pieces 17, 18 are then in such a position that the main part of the slit 23 is outside the transverse pieces .
• the wedge 22 is lowered into the slit 23 and is knocked down by means of a suitable tool, for example a hammer, a sledge-hammer or the like, and as a result of the shape of the wedge 22, the clamping member 14 is pressed with its clamping surfaces 20, 21 against the wall 5 of the upright 3, more specifically as a result of the fact that the edge 24 of the wedge 22 is pressed against the transverse pieces 17, 18 and the edge 25 is pressed against said edge surface in the slit 22.
• the hook-shaped member 9 is pressed simultaneously with its convex surface 13 against the inside of the bowl-shaped member 2.
• the slit may advantageously be provided, at least in the last-mentioned edge surface, with an oblique surface which corresponds to the inclination of said edge 25 in the assembled state of the device.
• Fig. 2 shows the bearing of the wedge 22 against the transverse pieces 17, 18 and its position in the slit 23.
• Fig. 4 the coupling device according to the invention is shown by way of example with four scaffold elements 11 connected to the upright 3 in direction at right angles to one another. According to the invention, however, any arbitrary directions can be se- lected for the scaffold elements 11 one the one hand in relation to one another and on the other hand in relation to a certain predetermined position of the upright 3.
• Fig. 4 shows that the clamping surfaces 20,- 21 in the example shown are not bevelled obliquely to match the wall of the upright, which gives a particularly stable edge engagement, held against rotation, through edge contact between the clamping surfaces 20, 21 and the wall 5 of the upright. In practice a certain minor deformation of the wall 5 occurs , which gives a further improved engagement.
• coupling together and disconnection can take place individually for each separate scaffold element 11 in relation to the upright 3.
• the peg 22 is driven upwards into the release position shown in Fig. 3, after which the clamping member 14 can be swung out and the scaffold element 11 can be unhooked with its hook-shaped member 9 from the bowl-shaped member 2. Then the scaffold element 11 can be removed from the upright 3.
• the clamping member 14 is modified somewhat and provided with an upper and a lower guide wall 28, 29 at each side of the end portion 10 of the scaffold element 11.
• These guide walls 28, 29 consist, for example, of transverse metal pieces which extend from the one end piece 16 to the other.
• the other clamping member consists , instead of a wedge, in this example of an arm 31 mounted pivotally on an eccentric pin 30 with a clamping surface 32 which is adapted to be placed against the edge surface 33 of the end piece 16.
• an arm 31 may approximately be disposed at each side of the end portion 10 so that each end piece 16 cooperates with an associated arm .
• the pin 30 is thus anchored in the scaffold element 11 and extends , for example, through a bore through this .
• Fig. 5 the coupling device is shown in the assembled state, in which the clamping member 14 is pressed against the upright in principle in the same manner as in the examples described above, the clamping action coming about by means of the mounting of the arm 31 in the end portion 10 of the scaffold element 11 and pressing with its clamping surfaces 32 against the associated edge surface 33 on each of the end pieces 16 in the clamping member 14.
• the arm 31 is protected from accidental manipulation by means of a protective plate 34 which is fitted to the top of the end portion 10 and extends sideways somewhat beyond its width to cover the arm 31 seen from above.
• the arm 31 or arms are swung down about their pins 30, and as a result of this successively reduced radii in relation to the pin 30 serving as pivotal centre, the clamping member 14 is released and can be moved backwards so that the scaffold element 11 can be unhooked from the upright 3.
• Fig. 6 shows an example of a scaffold 12, provided with coup- ling devices 1 according to the invention .
• the uprights 3 can thus be provided along their length with bowl-shaped members 2 with even spacing apart, while the transverse scaffold elements 11 each comprise said end portions 10, provided with the hook-shaped members 9 at each of their two ends .
• a scaffold can be lifted, for example by a crane and displaced while retaining its correct shape.
• a scaffold for example in the form of a lift tower, can be built lying down and then be raised by means of a crane to the upright position of use.
• the coupling device according to the invention can be used on other types of scaffold than pure building scaffolds , for example so-called mould stands to support moulds in foundry work.
• the bowl-shaped member may have another shape, for example it may be made with a plane shell wall and a plane bottom. The bottom can be perforated to a greater or lesser extent, for example the bottom can be replace by spacing members which support the wall 6.
• the bowl-shaped member may be replaced by a plurality of yokes determining the maximum number of scaffold elements 11 so that the continuous wall 6 extending with spacing from the upright is replaced by a plurality of separate walls , one for each yoke.
• the yokes can be formed as U-iron for example .
• both the hook-shaped member 9 and the clamping member 14 can have a completely different shape.
• the four clamping surfaces can be replaced by an upper and a lower wider coherent clamping surface for example.
• the clamping member may possibly comprise clamping surfaces adapted to bear against the upright only at one side of the bowl-shaped member, and the clamping member may be movably, for example, pivo tally, anchored in the end portion of the scaffold element 11.
• the clamping member 14 may, for example, consist of one of the end pieces 16 in which case the slit 23 has a leng thened extent in the longitudinal direction of the scaffold element so that the clamping member 14 can be introduced into this , after which the wedge 22 can be driven into the slit 23 outside said first clamping member and be pressed against its edge 33 (see Fig. 5) .
• Said first clamping member may be in two parts , in which case the lower part which forms the lower clamping surface can be displaceable in a groove in the longitudinal direction of the scaffold element and be adapted to be located in a clamping position by said other clamping member, for example a wedge.
• a threaded nut on the scaffold element can be used as the other clamping member which can be dis placed axially by turning about this and press said first clamping member against the upright.
• the nut can be replaced by another element, which can be turned axially round the scaffold element, for example a bevelled length of tube which, on turning, presses the first clamping member against the upright.
• the hookshaped member 9 can in practice, be made with a certain play in relation to the upright 3, which nevertheless gives a rigid coupling together without play, according to the principle of the invention .
• the scaffold element 11 may, instead of a transverse strut, consist of a bracket for example to support wings such as planks or the like or a vertical guide for a lift.
• the tube section 15 can be omitted and possibly be replaced by another element.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Ladders (AREA)
• Clamps And Clips (AREA)
• Movable Scaffolding (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20339106

Family Applications (1)

Country Status (18)

Cited By (9)

Families Citing this family (3)

Citations (6)

Family Cites Families (4)

• 1979
  • 1979-10-19 SE SE7908679A patent/SE423735B/sv not_active IP Right Cessation
• 1980
  • 1980-10-15 AU AU63918/80A patent/AU539039B2/en not_active Ceased
  • 1980-10-15 NL NLAANVRAGE8020381,A patent/NL189871C/xx not_active IP Right Cessation
  • 1980-10-15 WO PCT/SE1980/000250 patent/WO1981001164A1/en active IP Right Grant
  • 1980-10-15 JP JP55502328A patent/JPH0125862B2/ja not_active Expired
  • 1980-10-15 BR BR8009052A patent/BR8009052A/pt not_active IP Right Cessation
  • 1980-10-15 GB GB8134516A patent/GB2086522B/en not_active Expired
  • 1980-10-15 DE DE803049971T patent/DE3049971T1/de active Granted
  • 1980-10-17 FR FR8022254A patent/FR2467940A1/fr active Granted
  • 1980-10-17 IT IT25448/80A patent/IT1149861B/it active
  • 1980-10-18 ES ES1980262253U patent/ES262253Y/es not_active Expired
• 1981
  • 1981-06-15 DK DK261081A patent/DK151824C/da not_active IP Right Cessation
  • 1981-11-17 FI FI813642A patent/FI65837C/fi not_active IP Right Cessation
  • 1981-11-18 SU SU813358858A patent/SU1227124A3/ru active
• 1982
  • 1982-10-13 BE BE0/203234A patent/BE894693Q/fr active
• 1986
  • 1986-08-01 SG SG653/86A patent/SG65386G/en unknown
  • 1986-12-30 MY MY156/86A patent/MY8600156A/xx unknown
• 1988
  • 1988-12-29 HK HK1058/88A patent/HK105888A/xx not_active IP Right Cessation

Patent Citations (6)

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