摘要:
An escalator drive machine includes a motor output sheave which drives a drive belt along a closed look between the output sheave and a drive sprocket. The output sheave engages the drive belt with the step chain such that the step chain and attached tread plates are propelled from one landing to the other. The output sheave includes a first set of teeth and a second set of teeth. The first set of teeth is around the output sheave hub to engage a set of belt teeth extending from the drive belt. The second set of teeth is preferably located along a rim of the output sheave and is engageable with corresponding link teeth located along each link in the drive chain. The second set of teeth maintain their relationship with the corresponding link teeth due to the first set of teeth, however, there is no contact therebetween. However, should the drive belt fail or become disengaged, the second set of teeth engage the corresponding link teeth. The step chain and attached tread plates are thereby prevented from moving independently.
摘要:
An escalator drive machine includes a motor output sheave which drives a drive belt along a closed look between the output sheave and a drive sprocket. The output sheave engages the drive belt with the step chain such that the step chain and attached tread plates are propelled from one landing to the other. The output sheave includes a first set of teeth and a second set of teeth. The first set of teeth is around the output sheave hub to engage a set of belt teeth extending from the drive belt. The second set of teeth is preferably located along a rim of the output sheave and is engageable with corresponding link teeth located along each link in the drive chain. The second set of teeth maintain their relationship with the corresponding link teeth due to the first set of teeth, however, there is no contact therebetween. However, should the drive belt fail or become disengaged, the second set of teeth engage the corresponding link teeth. The step chain and attached tread plates are thereby prevented from moving independently.
摘要:
An escalator handrail drive arrangement includes a drive belt (26) mounted within a drive housing (35). Pressure rollers (30) are mounted in pairs and pivotally attached to the drive housing. The pressure rollers bias a handrail (22) against the drive belt. The pressure roller arrangements are mounted at each axial end. A spring (44) biases the pressure roller arrangements against the handrail, with the spring being centered along the axial length of the pressure rollers. This spring is preferably mounted within the drive housing such that no additional space is required outwardly of the drive and roller arrangement to accommodate the spring.
摘要:
A drawer configured to be extended from and retracted into a furniture body. The drawer includes a bottom part; a front panel; two lateral frames; and a back wall connected via a corner joint to an end region formed with one of the lateral frames. Each corner joint including a first connecting part and a second connecting part pivotably connected to the first connecting part. The second connecting part includes detent means for connecting the second connecting part to either the first connecting part or the back wall. The first connecting part is connected to an adapter associated with the end region formed by the back wall with one of the lateral frames.
摘要:
Passenger conveyor (2) including an endless conveyor band (6) comprised of a plurality of tread elements (4) connected to and driven by a drive chain (8) at each lateral edge thereof, a moving flange moving in use together with the conveyor band (6), the moving flange being comprised of a plurality of discs (16) attached to the tread elements (4) and a plurality of bridges (18) each attached alternating between two consecutive discs (16), wherein a groove and tongue (70) engagement is provided between bridge (18) and disc (16), characterised in that an insert (64) made of a plastic material is provided between bridge (18) and disc (16).
摘要:
A stepchain for a passenger conveyor includes a plurality of stepchain links (30, 130, 230). There is only one link-to-link interface (31) on each side of the steps (24) such that the number of links (30) on each side of the steps (24) is equal to the number of steps (24). The inventive arrangement reduces rotation or contraction of the stepchain between steps (24). Elongation of the stepchain is also reduced as there is a reduction in the number of interfaces (31). The inventive arrangement also facilitates arcuate movement of the steps (24) along a constant radius through the transition zones between the inclined area (27) and the landing areas (29). Having a truly arcuate movement allows for reducing the gap (33) between the steps (24) at the transition zones. In one example at least one needle bearing (190) is associated with an attachment mechanism (184, 284) at the interface (31) between adjacent links (30) to allow for rotation between the stepchain links (30) and to eliminate the need for lubrication.
摘要:
Passenger conveyor (2) including an endless conveyor band (6) comprised of a plurality of tread elements (4) connected to and driven by a drive chain (8) at each lateral edge thereof, a moving flange moving in use together with the conveyor band (6), the moving flange being comprised of a plurality of discs (16) attached to the tread elements (4) and a plurality of bridges (18) each attached alternating between two consecutive discs (16), wherein a groove and tongue (70) engagement is provided between bridge (18) and disc (16), characterised in that an insert (64) made of a plastic material is provided between bridge (18) and disc (16).
摘要:
A passenger conveyor handrail (30) includes a plurality of teeth (36) that interact with a toothed driving member (42). In a disclosed example, a low friction material (60) is placed near an end of the teeth (36) on the handrail (30). The low friction material (60) facilitates the teeth sliding along a guidance (70) but does not interfere with a desired engagement between the teeth(36) and corresponding teeth (46) on the driving member (42).
摘要:
A passenger conveyor drive assembly (40) includes drive members such as belts (42) that engage a step chain (30). A monitoring device (50) provides an indication of a damaged or broken drive member (42) by monitoring the relative rotations between wheels (44, 46). In one example, relative rotation between deflection wheels (46) provides an indication that one of the drive members (42) is not performing as well as the other. In another example, a comparison between the speed of rotation of the drive wheels (44) on the one hand and the deflection wheels (46) on the other hand allows for independently monitoring each of the drive members (42) of the drive assembly. In a disclosed embodiment, the monitoring device includes rotating members (52, 56) that normally rotate in unison and move into another position when there is relative rotation between the selected wheels. Such movement provides an indication of a malfunction of the drive system and may actuate the brake as needed.
摘要:
Passenger conveyor (2) including an endless conveyor band (6) comprised of a plurality of tread elements (4) connected to and driven by a drive chain (8) at each lateral edge thereof, a moving flange ( ) moving in use together with the conveyor band (6), the moving flange being comprised of a plurality of discs (16) attached to the tread elements (4) and a plurality of bridges (18) each attached between two consecutive discs (16), characterised in that at least one bridge (18) is attached to the drive chain (8) by means of a pin and socket connection (38) and that a resilient locking element (54) is arranged so as to bias in use the bridge (18) against the chain (8).