This application is a National Stage application of International Application No. PCT/FI2005/000206, filed May 4, 2005, which claims the priority benefit of Application No. FI20040907, filed in Finland on Jun. 30, 2004. The disclosures of the above-referenced applications are expressly incorporated herein by reference together with each U.S. and foreign patent and patent application mentioned below.
1. Field of the Invention
The present invention relates to a travelator system for conveying passengers.
2. Related Art
Travelators intended for transporting passengers are known e.g. from the following patent documents: Japanese patent document JP 2003-20181, U.S. Pat. No. 1,689,201, U.S. Pat. No. 2,769,522, and U.S. Pat. No. 3,592,139. In these, the conveyor includes a large number of adjacent narrow belt loops, several such belt loops being arranged over the width of the conveyor to transport users of the travelator. The conveyor has a large number of shafts arranged parallel to each other, at a distance from each other and transverse to the transport direction of the conveyor. Connected to each shaft are a number of belt pulleys placed side by side.
Further, the conveyor comprises a number of mutually parallel endless belt loops, which form the moving conveying surface of the conveyor. The mutual arrangement of the belt loops is so implemented that they are interlaced with respect to each other in a comb-like fashion around each shaft. Each belt loop is passed over two belt pulleys on two successive shafts. Of each two closely adjacent belt loops on the same common shaft that are passed over adjacent belt pulleys, one belt loop is passed over a belt pulley on the previous shaft adjacent to the common shaft while the other belt loop adjacent to the aforesaid belt is passed over a belt pulley on the next shaft adjacent to the aforesaid common shaft.
This prior-art type of travelator is designed to convey passengers from end to end, in other words, users board the travelator at one end and leave it at the other end.
A so-called fast travelator has a relatively high transport speed and it may be very long, even hundreds of meters. Such a long travelator provides the best service to areas located near the ends of the travelator. If more closely spaced areas are to be served, then it is necessary to build shorter travelators, and these have to be installed in a chain one after the other. However, in this case a higher speed of the travelator provides no corresponding advantage because time is wasted on accelerations in an acceleration section and on decelerations in a deceleration section. For example, if the nominal speed is 5 m/s, the acceleration and deceleration sections would already have a total length of about 100 m. Acceleration and deceleration require about 20 s extra time plus the time spent on walking between travelators. This type of a travelator system consisting of successive travelators provides no good service to those who travel long distances on them.
Further, U.S. Pat. No. 3,518,944 discloses a travelator which may be provided with entry and exit branchings. However, this travelator is not of the above-mentioned travelator type in which the conveying surface includes adjacent belt loops interlaced with respect to each other. Instead, in this document the conveying surface of the conveyor includes a large number of adjacently mounted rotatable rollers of small diameter. The conveying surface having separate rollers in the main and branch conveyors is not even and not a very good surface to stand or step on. Moreover, the conveying speed achieved with the construction described in the above-mentioned document is very low (about 700 mm/s) and does not allow long travelators to be built in an economically reasonable manner.
An object of the invention is to overcome the above-mentioned drawbacks.
Another object of the invention is to disclose a travelator system provided with intermediate entry connections and intermediate exit connections, giving new possibilities to make long and fast travelators that will provide good and efficient service to the entire area covered by the conveyor.
A further object of the invention is to disclose a travelator system that will serve people who travel long distances, minimizing their journey time, while at the same time serving people who make short trips, allowing them to board the main conveyor from the side and to leave the main conveyor, which may have a high conveying speed.
A further object of the invention is to disclose a travelator system having a conveyor construction that allows the conveying surface to extend substantially continuously and evenly without any discontinuities between the main conveyor and the branch conveyor branching off from it.
Example embodiments are presented in the following description and drawings of the present application. The inventive content disclosed in the application can also be defined in other ways than is done in the claims below. The inventive content may also include several separate inventions, especially if the invention is considered in the light of explicit or implicit sub-tasks or in respect of advantages or sets of advantages achieved. In this case, some of the attributes contained in the claims below may be superfluous from the point of view of separate inventive concepts. Within the framework of the basic inventive concept and/or inventive content, features and details of different embodiments of the invention can be applied in conjunction with other embodiments.
According to an embodiment of the invention, the travelator comprises a branch conveyor, which branches off in a connecting section with respect to the main conveyor to allow passengers to enter from the branch conveyor onto the main conveyor and/or to exit from the main conveyor onto the branch conveyor. The construction principle of the branch conveyor corresponds to that of the main conveyor. Thus, the branch conveyor comprises a number of shafts arranged to be parallel to each other, at a distance from each other and transverse to the transport direction of the conveyor, with a number of belt pulleys mounted side by side on each shaft. Further, the branch conveyor comprises a number of mutually parallel endless belt loops, each one of said belt loops being passed over two belt pulleys on two different shafts in such manner that, of each two closely adjacent belt loops on the same common shaft that are passed over adjacent belt pulleys, one belt loop is passed over a belt pulley on a previous shaft relative to the common shaft while the other belt loop is passed over a belt pulley on a following shaft relative to the common shaft. In the connecting section the branch conveyor and the main conveyor have at least one common shaft.
This embodiment of the invention has the advantage that the intermediate entry connections and intermediate exit connections give new possibilities to make long and fast travelators that will provide good and efficient service to the entire area covered by the conveyor.
A further advantage of this embodiment of the invention is that the travelator system will serve people who travel long distances, minimizing their journey time, while at the same time serving people who make short trips, allowing them to board the main conveyor from the side and to leave the main conveyor, which may have a high conveying speed.
An additional advantage of this embodiment of the invention is a conveyor construction that allows the conveying surface to extend substantially continuously and evenly without any discontinuities between the main conveyor and the branch conveyor.
The belt loops comprised in the conveying surface of the travelator system may serve as power transmitting belts or the power transmission to the shafts may be at least partly implemented via external power transmission.
In an embodiment of the travelator system, the connecting section between the main conveyor and the branch conveyor comprises a widening area where the main and branch conveyors have several shafts in common and where the main conveyor widens to the width of the branch conveyor. In the widening area the shaft lengths are mutually different in the transport direction and change between the width of the main conveyor and the total width of the main and branch conveyors.
In an embodiment of the travelator system, the main conveyor comprises an acceleration section for accelerating the passenger transport speed from a substantially slow initial speed to a heightened transport speed. Further, the main conveyor comprises a constant-speed section for conveying the passenger at a constant transport speed, and to which section the branch conveyor is connected. In addition, the main conveyor comprises a deceleration section for decelerating the passenger transport speed from the constant transport speed to a decelerated final speed.
In an embodiment of the travelator system, the system comprises a branch conveyor that forms an entrance to the main conveyor. The branch conveyor comprises an acceleration section for accelerating the passenger transport speed from a substantially slow initial speed to a heightened transport speed corresponding to the transport speed of the main conveyor at the point where the branch conveyor is connected to the main conveyor.
In an embodiment of the travelator system, the system comprises a branch conveyor that forms an exit from the main conveyor. The branch conveyor comprises a deceleration section for decelerating the passenger transport speed from the main conveyor's transport speed to a decelerated final speed.
In an embodiment of the travelator system, the system comprises a branch conveyor that comprises a constant-speed section for conveying the passenger at a constant transport speed.
In an embodiment of the travelator system, the system comprises at least two main conveyors, the constant-speed sections of which intersect each other at different levels. The transport speed of the branch conveyor is substantially the same as the constant transport speed of the main conveyors. The branch conveyor is arranged to interconnect the constant-speed sections of the main conveyors so as to allow passengers to be transferred from one main conveyor onto the other main conveyor.
In an embodiment of the travelator system, the travelator system forms a public transport network comprising a number of mutually intersecting main conveyors at different levels and a number of branch conveyors branching off from them.
In an embodiment of the travelator system, the two belt pulleys provided for each belt loop and placed on different shafts comprise a first belt pulley and a second belt pulley. In the deceleration and acceleration sections, a transmission ratio exists between the first belt pulley and the second belt pulley.
In an embodiment of the travelator system, the transmission ratio is determined by the ratio of the diameters of the first belt pulley and the second belt pulley.
In an embodiment of the travelator system, in the acceleration section the diameter of the first belt pulley is larger than the diameter of the second belt pulley.
In an embodiment of the travelator system, in the deceleration section the diameter of the first belt pulley is smaller than the diameter of the second belt pulley.
In an embodiment of the travelator system, the belt loops are toothed belts. In the deceleration/acceleration section, the first belt pulley and the second belt pulley are toothed belt pulleys having different numbers of teeth, the transmission ratio between the first belt pulley and the second belt pulley being thus determined by the ratio of the numbers of teeth on the belt pulleys.
In an embodiment of the travelator system, in the acceleration section the transmission ratio between the first belt pulley and the second belt pulley is 1<i≦1.1.
In an embodiment of the travelator system, in the deceleration section the transmission ratio between the first belt pulley and the second belt pulley is 1>i≧0.9.
In an embodiment of the travelator system, the initial speed and the final speed of the travelator are of the order of about 0.5-0.7 m/s.
In an embodiment of the travelator system, the transport speed in the constant-speed section is of the order of about 2.5-7 m/s, suitably about 3-6 m/s and preferably about 5 m/s.
In an embodiment of the travelator system, the change in transport speed in the acceleration section is so adapted that the average acceleration experienced by the passengers is of the order of about 0.3 m/s2.
In an embodiment of the travelator system, the change in transport speed in the deceleration section is so adapted that the average deceleration experienced by the passengers is of the order of about 0.3 m/s2.
In an embodiment of the travelator system, the travelator system is composed from conveyors designed to be mounted on a fixed base, such as a floor, the ground or some other support.
Aspects of the invention will now be described by way of example only with reference to the accompanying drawings in which:
The main conveyor 1 has at its beginning an acceleration section 7, which accelerates the passenger transport speed from a substantially slow initial speed corresponding to walking speed to a heightened transport speed. The initial speed is preferably 0.5-0.7 m/s. After the acceleration section in the transport direction, the conveyor has a constant-speed section 8 for conveying the passenger at a relatively high constant transport speed. The transport speed in the constant-speed section 8 is of the order of about 2.5-7 m/s, suitably about 3-6 m/s and preferably about 5 m/s. After the constant-speed section 8 the main conveyor has a deceleration section 9 for slowing down the passenger transport speed from the constant transport speed back to a decelerated final speed corresponding to walking speed. The final speed is preferably of the order of about 0.5-0.7 m/s. In the acceleration section 7 the change in transport speed is preferably so adapted that the average acceleration experienced by the passengers is of the order of about 0.3 m/s2. In the deceleration section 9 the change in transport speed is so adapted that the average deceleration experienced by the passengers of the order of about 0.3 m/s2.
The travelator schematically depicted in
The example travelator depicted in
In the connecting section 6, the respective transport speeds of the first and second branch conveyors 5 and the main conveyor 1 are substantially the same.
Referring to
Both the main conveyor 1 and the branch conveyor 5 comprise a plurality of shafts 2 so arranged that they are parallel to each other at a distance from each other and transverse to the transport direction of the main and branch conveyors 1, 5. Mounted side by side on each shaft 2 are a plurality of belt pulleys 3. Further, the main conveyor 1 and the branch conveyor 5 each comprise a plurality of parallel endless belt loops 4, which form the conveying surface of the main and branch conveyors 1 and 5. The belt loops 4 are preferably toothed belts. Correspondingly, the belt pulleys 3 are toothed belt pulleys, a plurality of such pulleys being mounted side by side on each shaft 2.
As is also seen from the sectional views in
In the widening area between the main conveyor 1 and the branch conveyor 5 in the connecting section 6, the main conveyor 1 and the branch conveyor have a number of common shafts 2, the transverse lengths of which shafts, as seen in the transport direction, are mutually different, changing between the width of the main conveyor 1 and the total width of the main and branch conveyors 1, 5. These shafts 2 are mounted with bearings (not shown) at either end on the frame structure of the conveyor.
In the acceleration section 7 (not shown), the diameter D1 of the first belt pulley 3-1 is larger than the diameter D2 of the second belt pulley 3-2. In the acceleration section 7, the transmission ratio between the first belt pulley 3-1 and the second belt pulley 3-2 is 1<i≦1.1.
The invention is not limited to the example embodiments described above; instead, many variations are possible within the scope of the inventive concept defined in the claims.
Number | Date | Country | Kind |
---|---|---|---|
20040907 | Jun 2004 | FI | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/FI2005/000206 | 5/4/2005 | WO | 00 | 12/21/2006 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2006/003236 | 1/12/2006 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
1412969 | Sachs | Apr 1922 | A |
1665483 | Taylor | Apr 1928 | A |
1689201 | Halter | Oct 1928 | A |
2769522 | Pfeiffer | Nov 1956 | A |
3518944 | Patin | Jul 1970 | A |
3592139 | Patin | Jul 1971 | A |
4232776 | Dean | Nov 1980 | A |
5341915 | Cordia et al. | Aug 1994 | A |
6951274 | Zeitler et al. | Oct 2005 | B2 |
Number | Date | Country |
---|---|---|
549153 | Feb 1923 | FR |
217308 | Jun 1924 | GB |
08-133465 | Sep 1996 | JP |
2003-20181 | Feb 2003 | JP |
WO 2005051829 | Jun 2005 | WO |
Number | Date | Country | |
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20080035447 A1 | Feb 2008 | US |