| 摘要 |
1,180,562. Releasable fastenings; scaffolding. KWIKFORM Ltd. 17 April, 1967 [29 April, 1966; 11 Jan., 1967], Nos. 18830/66 and 1506/67. Headings E1S and E2B. In builders scaffolding of the kind specified which comprises an upright member 10, a cross member 20a or 20b and connecting means for detachably connecting them together, wherein the connecting means comprises a socket 13 mounted on the exterior of the upright member; the socket being open at each of its two opposite ends which are spaced apart along the length of the upright member, the connecting means further comprising connector means 21 provided at or near one end of the cross member or formed integrally with it and including two limbs 23, 24 which in the operative position are spaced apart vertically to permit of the upright member socket being received therebetween, each limb having an abutment face 23a, 24a adapted to abut against the upright member, each limb further being provided with an opening which receives a wedge clamping member 27 forming part of the connector means, the arrangement being such that in connecting the cross member to the upright member the two limbs of the connector means are disposed vertically spaced apart and straddle the socket with the wedge clamping member extending through the two open ends of the socket in pressure engagement with an edge of the opening of each of the two limbs which is nearest to the upright member and also with an internal clamping face of the socket, in such a manner that said abutment faces of the two limbs are brought into pressure engagement with the upright member at positions above and below the socket. In the construction shown the upper limb 23 is provided with a pair of dependant lips 31, which extend transversely to the abutment face 23a, the lips being formed by bending over the edge portions of the upper limb and being positioned adjacent the free end thereof. The lower edge of each lip is spaced from the lower limb 24 by a distance greater than the vertical depth of the socket 13 so as to provide sufficient clearance to permit of the sideways removal of the cross member with respect to the socket. The internal faces of the lips 31 are spaced apart a sufficient amount to accommodate the maximum width of the socket so as to limit angular movement of the crossmember about the longitudinal axis of the upright member to not more than 5‹. The wedge clamping member 27 is provided with a small protrusion 28 near its narrow end and the slot 26 in the lower limb 24 is of a width sufficiently great to enable the protrusion 28 to be passed through, while the width of the slot 25 in the upper limb is slightly less so as to prevent the protrusion being passed through. As shown, the connector means is a U-shaped member, the base 22 of which is welded to the remainder of the cross-member but, in a modification, the connector means is a channelshaped member with the slots extending parallel to the base of channel and the upper limb is welded to the remainder of the crossmember. In this construction, the upper limb has no lips. In a further modification, the limbs of the connector means are formed by cutting. away a part of the cross-member. Here again the upper limb has no lips. A construction is also described in which the connector means is U-shaped with its base welded to the remainder of the cross-member and which is similar to the first construction except that the lips are omitted. In a further construction, the connector means which is identical with that first described, including the lips, instead of being welded to the remainder of the crossmember, is connected to a flattened end part by a pivot pin. |
