Abstract: A rope pulley construction comprising a frame, at least one rope pulley equipped with a rope groove, rope pulley bearing, guard to prevent a lifting rope from coming off the rope pulley, and suspension point for hanging the rope pulley. The frame of the rope pulley construction comprises two plate parts joined together which simultaneously provide suspension for the rope pulley, at least one suspension point for hanging the rope pulley construction and guard to prevent a lifting rope from coming off the rope pulley.

Abstract: A method and an apparatus for measuring a load of a hoisting apparatus, where electricity is used as the driving force and a squirrel cage motor as the hoisting motor for moving a load attached to a hoisting member of the hoisting apparatus substantially in the vertical direction. The method and arrangement are employed to determine air gap torque of the hoisting motor, which describes the load of the hoisting apparatus, utilizing magnetization flux of the hoisting motor determined on the basis of the current, supply voltage and stator winding resistance of the hoisting motor. The value of the air gap torque is compared with an air gap torque curve determined for the hoisting apparatus at known reference loads to determine the load that corresponds to the air gap torque in question.

Abstract: A method for manufacturing a lifting hook and a lifting hook. In this method a supporting portion is formed of a lifting hook billet at the end of a lifting hook shaft, the lower surface of the supporting portion is formed into a bearing surface and correspondingly a separate uniform bearing ring surrounding the shaft is separated from the lifting hook billet, and a bearing surface is formed into the bearing ring. The lifting hook comprises a supporting portion at the end of the shaft and a uniform bearing ring surrounds the shaft between the hook and the supporting portion.

Abstract: A method and an arrangement for adjusting the disc brake of a squirrel cage motor, the squirrel cage motor having a stator, a rotor arranged on a shaft of the motor and having a deflector for deflecting part of the magnetic field of the stator to a stray flux of the magnetic field of the rotor in the direction of the shaft, the motor further having an armature arranged on the shaft, a flexible element arranged between the deflector and the armature for pushing the armature away from the deflector, at least one brake disc supported to a motor frame via at least one slot, at least one trigger gear arranged on the shaft and a shaft bearing.

Abstract: The invention relates to a power transmission and bearing arrangement for a drum, the drum (1) being provided for a rope (2) that exerts a tangential force on the circumference of the drum, and the arrangement comprising the mounting of the drum in bearings (7 to 10) to a frame structure (6) and a drive arrangement for rotating the drum, the drive arrangement comprising at least one member (3) that is in drive engagement with the drum surface. To simplify the structure and to eliminate the bending moment acting on the drum, the drum bearing arrangement comprises means (7 to 10) that carry the drum and support the drum surface (1) to the frame structure (6) directly from the outer and inner surfaces (4, 5) of the drum surface, the point where the rope is unwound from the drum being located within the bearing area when seen from the end of the drum.

Abstract: An axial support of a winding drum, i.e. a support in the direction of the longitudinal axis of the winding drum, in a hoisting apparatus comprising a frame, a grooved winding drum supported substantially perpendicular to its longitudinal axis against the frame by bearings, a hoisting rope and machinery. The winding drum comprises at least one axial support element and the frame comprises at least another axial support element, and at least either the axial support element of the winding drum or the axial support element of the frame substantially extends round the circumference of the winding drum. The axial support element of the winding drum and the axial support element of the frame are arranged in respect of each other such that the movement of the winding drum in the direction of its longitudinal axis, which is caused by the axial component of the rope force of the hoisting rope, is hindered at least in one direction.

Abstract: The invention relates to a vacuum gripping apparatus for moving roll-like loads, the loads being piled on top of each other and resting on their even end faces, the vacuum gripping apparatus comprising a suction plate (3) to be arranged against the end face of a load, the outer circumference (12) of the suction plate being provided with corner portions (19), side edges (21) that connect the corners of the portions being curved inward, that the outer circumference (12) of the suction plate (3) determines the maximum lateral dimensions of the structure above the suction plate.

Abstract: The invention relates to an arrangement for fastening a plug into the edges of an opening of a case. In the arrangement of the inventions the plug includes, in connection therewith, fastening portions and grooves of varying depths for fastening the plug into the case opening. The arrangement also comprises a flexible element for arranging the plug into the case opening. The invention further relates to a plug to be arranged into the edges of an opening in the case. The plug includes, in connection therewith, fastening portions and grooves of varying depths for fastening the plug into the edges of the case opening, and a flexible element to be placed at the bottom of the deeper groove for arranging the plug into the case opening.

Abstract: The invention relates to a disc brake to be opened by torque, the disc brake being arranged between a drive shaft (3) and a driven shaft (11) and comprising a brake wheel (12) arranged on the driven shaft (3) non-rotatably in the peripheral direction; a friction surface (15) arranged to cooperate with the brake wheel (12); a spring device (14) arranged to press the brake wheel (12) axially against the friction surface (15) and means (19 to 21) causing, by the action of the torque and torsion of the drive shaft (3) and a possible counter-torque of the driven shaft (11), the brake wheel (12) and the friction surface (15) to drift axially apart and, accordingly, the braking coupling between them to loosen against the spring force of the spring device (14), whereby the drive shaft (3) and the driven shaft (11) are interconnected in such a way that they may turn a restricted rotational angle with respect to each other and that means for causing said axial displacement and for loosening the braking coupling compris

Abstract: A profile rail joint for use for example in light crane systems has connecting ends of profile rails to be joined, provided with jointing sleeves arranged on side surfaces of the rails, the sleeves comprising through holes for locking devices of the joint, and at least two of the sleeves being situated in profile recesses of the rails. The joint also includes guide elements extending over the joint surface for aligning the connecting ends. At least two jointing sleeves provided in the profile recesses are arranged such that the bottom of the recess and the side wall of the jointing sleeve are spaced apart at least over a section of the sleeve's length, the guide elements for the joint being placed in resulting intermediate spaces.

Abstract: A load brake having a load shaft, a flange-like pressure plate fixedly mounted onto the load shaft, and a cogwheel arranged on the load shaft. A tension device produces an axial motion and force in the cogwheel as the wheel rotates with respect to the load shaft, and a ratchet wheel is mounted between the pressure plate and the cogwheel. A pawl prevents the rotation of the ratchet wheel at least in the release direction of the load shaft, and friction surfaces are provided between the pressure plate and the ratchet wheel, and the ratchet wheel and the cogwheel. Rotation that tends towards the release direction of the load shaft and that is faster than the speed of rotation of the cogwheel brings the pressure plate and the cogwheel closer together in the axial direction and presses them against the ratchet wheel.

Abstract: The invention relates to a chain elevator comprising an elevating chain (1) made up of links (2) attached to each other, whereby the planes formed by adjacent links are primarily at a 90° angle in relation to each other; an elevating element (3) having a driven chain gear (7) arranged to it, the elevating chain (1) being led to couple with the driven chain gear from the fixing point (9) of the fixed end (8) of the elevating chain located above the driven chain gear (7); and a driving chain gear (100) located above the driven chain gear (7), the elevating chain being led to couple with the driving chain gear from the driven chain gear (7).

Abstract: A press roll unit for a roll-up of a paper cutter has two adjacent rolls. A belt or plurality of belts is wound around the rolls to operatively interconnect them. An electric motor inside at least one roll drives the roll unit. The belt or plurality of belts have at least one aperture for cooling the electric motor and the roll surrounding it.

Abstract: The invention relates to an apparatus for reducing overload and dampening collision energy, for instance, in connection with a container crane, the apparatus comprising a movable bar (16) to receive a load and a resistance device (18) against the predetermined resistance of which the movable bar are able to move in a dampening situation, and the resistance device comprise at least one friction device (18) arranged to cooperate with the movable bar (16).

Abstract: A bridge crane includes at least one main girder (1), a trolley moving on the main girder or at least one hoist gear fixed to the main girder, end carriages (4) arranged at the ends of the main girder to support the main girder, wheels arranged to the end carriages intended to move along substantially parallel rails (7) substantially parallel to the end carriages and on the other hand substantially transverse in relation to the main girder and thus to support the entire crane on the rails, while slides (10 to 17) have been arranged between one end carriage (4) and the corresponding end (9) of the main girder (1) allowing a longitudinal movement of the end carriage (4) in relation to the main girder (1) and a rotation of the end carriage and main girder in relation to each other.

Abstract: A control system for a rope bucket, the rope bucket being designed for the hoisting and transfer of materials and adapted to be suspended from a hoist trolley transferable along an essentially horizontal travel path. The control system includes a hoist mechanism for hoisting the rope bucket, and a close mechanism for closing and opening the scoops of the rope bucket, and also for hoisting and lowering the rope bucket. The hoist mechanism includes two separate mechanisms, and similarly the close mechanism includes two separate mechanisms which also form the transfer mechanism of the hoist trolley.

Abstract: In an electric chain hoist, there is a slipping clutch in the drive line which connects the electric motor to the chain sprocket, the slipping clutch acting as an overload safeguard. A holding brake is also provided to hold the drive line in the braked state when the motor is switched off. The brake exerts its braking action primarily on that part of the drive line which lies between the slipping clutch and the chain sprocket. To prevent the slipping clutch from entering the slipping state when the motor is switched on before the brake has been released to a sufficient extent, the brake is designed in such a way that it acts on both parts of the drive line.

Abstract: A chain hoist contains a slipping overload clutch in the drive line which connects the electric motor to the chain sprocket. This slipping clutch has two clutch halves which are in frictional engagement with one another and are preloaded into frictional engagement with one another by a spring. A holding brake is furthermore provided and this holding brake acts against the clutch disks so as to increase the frictional grip between the clutch disks in the applied state. This ensures that when the hoist is started and the disengagement of the brake is delayed, the slipping clutch does not enter the slipping state.

Abstract: A travel drive for a trolley traveling gear of hoists has a drive train which has the properties of a freewheel as regards the direction of travel. Consequently load oscillation can be rapidly damped out because the speed of the traveling gear is not forcibly held constant during the semioscillation of the load in which it moves ahead of the traveling gear. On the contrary, the swinging load is able to drag the traveling gear behind it, accelerating it in the process, and in this way to convert oscillation energy into driving energy.