摘要:
A temporary load support system including a permanent portion comprising a stud (34) having a stem (62) and crosspiece (64), and a removable load support member (32) comprising a cavity, configured to receive the stud and engage the crosspiece upon relative rotation of the support member relative to the stud while the stud is received in the cavity, whereby the support member is removably attached to the stud so as to enable load transfer from the support member to the stud.
摘要:
Eine Stufe oder Sprosse für eine Leiter, eine Stiege oder dergleichen ist mit einem Strangpreßprofil (28) aus Metall versehen, das eine Einlage (30), insbesondere aus Kunststoff, aufweist. Die Einlage (30) ist benachbart mindestens einer Rippe (32,34) des Strangpreßprofils (28) ausgebildet, über dessen Anrollen die Einlage (30) lagerbar ist.
摘要:
Die Erfindung betrifft ein Antrittsprofil aus Metall, insbesondere für die Antrittskante einer Treppenstufe, eines Podests oder eines Laufstegs oder für eine Steigleitersprosse, wobei das Antrittsprofil ein Biegeprofil mit wenigstens einem im Einbauzustand vertikalen, nach unten weisenden Schenkel (6) und wenigstens einem horizontalen, oberen Schenkel (7) ist und wobei das Antrittsprofil mit einer rutschhemmenden Kontur versehen ist. Das Antrittsprofil gemäß Erfindung ist dadurch gekennzeichnet, daß an oder in der entlang der gemeinsamen Kante des vertikalen Schenkels (6) und des horizontalen, oberen Schenkels (7) verlaufenden Biegeachse (3) des Antrittsprofils mehrere nach oben und/oder nach vorn weisende Zacken (1) einstückig angeformt sind. Weiterhin betrifft die Erfindung ein Verfahren zur Herstellung eines Antrittsprofils.
摘要:
A foothold (1) of a manhole, a quay, and the like which enables operators to put their feet or foot (7) on a tread (5; 23) in a natural state under a stable condition, and to reduce their fatigue with their feet (7) or knees when they move up and down in a manhole by use of the foothold (1). The foothold (1) of the manhole, the quay, and the like comprises the tread (5; 23) and side portions (6; 24) continued from and positioned at both sides of the tread (5; 23), wherein at least the upper surface of the tread (5; 23) is inclined upward from a central portion of the tread (5; 23) toward the side portions (6; 24) at an angle ranging from 1 to 5 degrees.
摘要:
Each step (15) is a molded one-piece hard elastomer member having a pair of rope-receiving openings, (33) the upper outlet from which closely confines a pair of ropes (13,14) while the bottom of the opening is much wider. Each opening tapers inwardly from bottom to top, and each step has a pair of vertical bolt openings (37,38) therethrough adjacent each opening. A separate wedge collar (17) for each opening (33) bears against the bottom of each step and has a single through opening (54) at its upper end the opening (54) is the same width as the lower end (34) of the step's opening (33), and it tapers inwardly down to an outlet (55) that closely confines the two ropes (13,14). Each wedge collar (17) has a pair of vertical bolt passages (57,58) aligned with those of the step (15) to enable bolting the step (15) to the collar (17). A generally diamond-shaped wedge heart (18) is wedged in between the two ropes (13,14) of each pair, lying partly inside the opening (33) through the step (15) and partly inside the opening through (54) the wedge collar (17). The wedge heart (18) has an upper vertex (63) a lower vertex (64) and two rope-engaging side grooves, which lock the pair of ropes in place.
摘要:
A modular platform system utilizing a number of components including a platform. The platform is configured so that each of the components may interchangeably connect to any side of the platform. The components include, for example, handrails and stairways, as well as other platforms. The platform and most of the components are formed from single, continuous pieces of metal.
摘要:
An extendable/retractable ladder assembly (100) includes a first stile (104) and a second stile (106) and a plurality of rungs (118, 120, 150) extending therebetween. Each stile may comprise a plurality of columns (108, 110, 112, 114) disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly (116) connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.
摘要:
A transition device (110) for fitting to an extension ladder comprising a single elongate rung portion (115) and two hook-shaped arm portions (116) at respective opposite ends of the rung portion (115). The hook-shaped arm portions (116) comprise respective wing formations (120) that project longitudinally from each end of the transition device (110). In use, the hook-shaped arm portions (116) are engaged over the uppermost exposed rung (111) of the lower section (112) of the extension ladder, such that the formations (120) abut the uprights (121) of the ladder and prevent movement or rotation of the device (110). The transition device (110) acts to increase the forward extension of the rung (111) and thereby enables a user to step safely over the transition between the lower and upper sections (112, 114).
摘要:
The disclosed invention is a collapsible ladder of simple construction and operation that can remain secure whilst being locked in the collapsed position to prevent unauthorised access. The ladder consist of a plurality of rungs pivotally connected to a pair of parallel rails. The key operated locking mechanism is designed to be tamper proof. The locking mechanism includes a rotatable latch that securely engages an opening in one of the rungs.