HK1213539B - An escalator having a step band or to a moving walkway having a pallet band - Google Patents

Description

Escalator with step belt or moving walkway with pallet belt

Technical Field

The invention relates to an escalator with a step band or a moving walkway with a pallet band. The step band or pallet band comprises at least one articulation chain on which the steps or pallets are arranged.

Background

Escalators and moving walkways are subjected to high loads, which vary due to fluctuations in the number of users, and have long operating times of 10 to 18 hours per day. In public transport buildings, such as airports, railway stations or subway stations, escalators and moving walkways may even be continuously put into use all the time. Accordingly, the moving parts of the conveyor are subject to high wear and therefore have to be maintained intensively and thoroughly. The parts (vulnerable parts) which have high loss degree and need to be replaced regularly are especially finger pallet belt or step belt and conveying chain wheel and steering chain wheel. The transfer sprockets drive the articulation chain and the turning sprockets are used to turn the articulation chain assembly from the feed section to the return section or from the return section to the feed section depending on the direction of travel of the step band or pallet band. Recently, articulated chains have rather long chain links, so that the number of hinge parts subject to wear can be reduced to the minimum required. Preferably, the hinge spacing between two hinges is equal to the platform depth or step depth. Each additional articulation also means a higher manufacturing cost of the articulated chain or conveyor chain and requires a higher number of connecting elements, such as chain pins or carrier shafts, and guide elements (such as chain rollers).

Pallet or step belt can be replaced relatively easily, and the replacement of the conveyor and diverting sprockets requires a very high work effort, which causes the associated conveyor to be out of service for a long time.

In recent years, escalators and moving walks of flat construction have been increasingly developed. Such escalators and moving walkways have numerous advantages in terms of construction technology for the passengers. For example, it is possible to dispense with a shaft pit in the ground in the case of a moving walkway with a small structural height. Escalators with a smaller structural height can be installed in existing buildings, since the installation space provided by dismantled old escalators is mostly sufficient. If necessary, the support means of the escalator to be replaced can be retained, while a new escalator can be installed incorporated into the old support means or frame structure.

In order to construct a flat-structured escalator or a flat-structured moving walkway, the diameters of the transfer and steering sprockets must be reduced. This causes a greater deflection of the chain section or chain link of the articulated chain in the region of the diverting or conveying sprocket. In addition, with the same pitch (Teilung), the non-uniform movement of the step band or pallet band increases with decreasing sprocket pitch circle diameter and with decreasing number of teeth, the so-called polygon effect. Different measures for eliminating the polygon effect are disclosed for example in EP 1876135B 1.

These measures enable the use of long chain links or chain sections in combination with small steering and conveying sprockets without the occurrence of a polygon effect or at least with little perception of such a polygon effect by the user. The long joint spacing additionally increases the pivot angle of the joints and, when the pitch diameter is predefined on the circumference of the sprocket, fewer teeth engage the articulated chain, as a result of which the pressure and thus the wear of the tooth roots and flanks of the steering sprocket or of the conveying sprocket becomes significantly greater compared to a sprocket having the same pitch and pitch diameter.

Disclosure of Invention

The object of the invention is therefore to provide an escalator or moving walkway whose conveyor and/or deflection sprockets have a significantly longer service life than the known sprockets of similar dimensions.

The object is achieved by an escalator with a step belt or a moving walkway with a pallet belt, wherein the step belt or pallet belt has at least one articulated chain comprising engagement sections arranged behind one another with a theoretically identical engagement distance. This is theoretically possible because the engagement distance can vary to a large extent within the permissible range due to manufacturing tolerances and due to wear. On the articulated chain, steps or pallets are arranged. The escalator or moving walk also has a first deflection area and a second deflection area with at least one conveyor sprocket, wherein the conveyor sprocket deflects and drives the articulated chain. The first diverting area can have at least one diverting sprocket or at least one diverting arc for diverting the articulated chain. At least one articulated chain is arranged between the deflection regions in a revolving manner, wherein the engagement section engages in the tooth gap of the conveying sprocket and, if necessary, in the tooth gap of at least one deflection sprocket arranged in the first deflection region.

In order to increase the service life, at least one conveying sprocket and/or at least one steering sprocket has a pitch circle with a pitch relative to the tooth gap, which pitch is equal to half the engagement distance. On the basis of the relationship that the pitch of the conveying sprocket and/or the deflecting sprocket is equal to half the engagement distance, in the deflecting region, there is always one engagement portion for every other tooth gap. As will be described in more detail below, the life of the sprocket can thus be almost doubled.

The inlay can be constructed in very different ways. The hinge of the at least one hinge chain may for example form a scarf joint.

On the at least one articulated chain, a chain roller can also be arranged, which serves as an engagement. The chain rollers have a chain roller width which is equal to the length of the contact line of the sprocket and the chain rollers during the engagement. The length of the contact line is selected as follows: so that the allowable pressure of the chain roller material or the turning sprocket material and/or the conveying sprocket material is not exceeded. Preferably, such chain rollers are arranged on the articulations of an articulated chain. Here, not every hinge is necessarily provided with a chain roller.

In a first embodiment of the invention, the characteristic features of articulated chains or roller chains used in escalators and moving walks are exploited. The characteristic feature is that the articulated chain has long chain links or chain parts compared to the usual roller chains on the market, based on the pallet length or step length or pallet depth or step depth. Without using a sprocket with very thick teeth that are coordinated with the length of the chain element, the invention provides for using a sprocket with almost double number of teeth. Preferably, at least one of the conveying sprockets and/or the steering sprocket has an odd number of teeth. The odd number of teeth is such that: after two revolutions of the transfer or diverting sprocket, all the tooth spaces are occupied once. Since each tooth gap can engage with the engagement portion, the engagement portion of the articulated chain does not have to be offset relative to the steering sprocket and/or the conveyor sprocket. Of course, an even number of teeth is also possible, so that when half the life of the transmission sprocket or the deflection sprocket is reached, the articulated chain is displaced by a pitch offset from the deflection sprocket and/or the transmission sprocket, so that during the other half of the life, the corresponding backlash is not utilized until then.

The second embodiment of the invention is based on the teaching disclosed in EP 1876135B 1 and is particularly suitable for moving escalators and moving walks with a very low construction height. In this embodiment, the chain roller of the at least one articulated chain serving as the hitching section is divided into a first chain roller and a second chain roller. In addition, the first chain roller is arranged on the articulated chain offset relative to the second chain roller, so that the first chain roller and the second chain roller roll over on tracks which are arranged next to one another. The conveying or diverting sprocket has the width of one track and is, for example, aligned with the first track. By means of this offset arrangement of the chain wheels, a very long engagement distance between the chain rollers is achieved, which, in the manner according to the invention, enables a greater number of tooth gaps (weiterer) to be arranged on the chain wheels, all of which can be occupied by an odd number of teeth.

As proposed in EP 1876135B 1: for example, a first chain roller is guided by the conveying sprocket and the steering sprocket, and a second chain roller is guided by the steering knuckle aligned with the conveying sprocket or the steering sprocket. In order to eliminate the so-called polygon effect, the chain rollers can be placed on the base circle of the conveyor sprocket or the deflection sprocket in the respective deflection region, wherein the base circle radius is smaller than the radius of the deflection element.

Instead of a steering knuckle, a second sprocket may also be applied. The first chain rollers are then guided on the first conveyor sprocket, and the second chain rollers are guided on a second conveyor sprocket arranged parallel to the first conveyor sprocket and connected to the first conveyor sprocket in a rotationally fixed manner. In the opposite deflection region, the first chain roller is guided on a first deflection sprocket and the second chain roller is guided on a second transmission sprocket arranged parallel to and rotationally fixed to the first transmission sprocket, provided that a deflection wheel is provided there. As long as the conveying sprockets or the steering sprockets have the same pitch circle diameter, the polygon effect always exists. However, when the first conveying sprocket and the first diverting sprocket have a larger pitch circle diameter than the second conveying sprocket and the second diverting sprocket, then the polygon effect can be at least significantly reduced according to the teaching of EP 1876135B 1.

The chain rollers can be constructed in stages if they are not arranged offset on the articulated chain. This means that: the chain roller has a first roller diameter in a first half of its chain roller width and a second roller diameter smaller relative to the first roller diameter in a second half of its chain roller width. The chain rollers can be arranged alternately in their stepped configuration between the chain links of the articulated chain, so that a first portion of the chain rollers and a second portion of the chain rollers roll with their first roller diameter on tracks or rails which are arranged next to one another.

Articulated chain chains with chain rollers of stepped design can also be used in escalators and moving walks, the conveying sprocket and the deflecting sprocket of which have a base radius, wherein the width of the conveying sprocket and the deflecting sprocket is equal to half the chain roller width of the stepped chain rollers. The transfer sprocket and the diverting sprocket are aligned with one of two tracks placed next to each other. In addition, a deflecting curve element is respectively present which is aligned with the conveyor sprocket or deflecting sprocket and the second path, so that in the deflecting region the first roller diameter alternately engages on the base radius or on the deflecting curve element. The stepped chain rollers which project into the tooth gaps of the chain wheel never lie with their second roller diameter on the base radius and are therefore not engagement parts in the manner according to the invention.

Even in the case of roller staging, the conveying and steering sprockets still have a smaller radius than the steering knuckle.

Another embodiment of the articulated chain provides in turn a chain roller of stepped configuration having a first roller diameter in a first half of its chain roller width and a second roller diameter smaller relative to the first roller diameter in a second half of its chain roller width. In the embodiment with its stepped design, the chain rollers are also arranged alternately between the chain links of the articulated chain and are thus divided into a first and a second part of the chain rollers. In contrast to the previously described embodiments, the first portion of the chain rollers and the second portion of the chain rollers roll over a common intermediate path with their first roller diameters. While a first portion of the chain rollers are aligned with respect to their second roller diameter with respect to a first side track running parallel to the center track and a second portion of the chain rollers are aligned with respect to their second roller diameter with respect to a second side track running parallel to the center track.

The conveying and, where present, diverting sprockets of this embodiment have a base radius and the width of the conveying and diverting sprockets is equal to half the chain roller width of the stepped chain rollers. The width of the transfer and turnaround sprockets is aligned with one of the two side tracks. In addition, there are steering bends aligned with the conveyor or steering sprockets and the intermediate path, respectively, so that in the steering region the first roller diameter rests on the steering bends and the second roller diameter of the side path rests on the base radius.

A development of this embodiment is that the first part of the chain rollers is guided with their second roller diameter by means of a first transmission sprocket and a first diverting sprocket aligned with one of the two side tracks. The second portion of the chain rollers is guided with their second roller diameter by means of a second transfer sprocket aligned with the second side path and arranged parallel to the first transfer sprocket and rotationally fixedly connected to the first transfer sprocket and by means of a second diverting sprocket arranged parallel to the first diverting sprocket and rotationally fixedly connected to the first diverting sprocket. In addition, in the deflection region, the first and also the second portion of the chain rollers roll with their first roller diameter over a deflection element arranged between the conveyor sprocket or deflection sprocket. The deflection curve can be interrupted in sections, so that in the deflection section sections the chain rollers engage with the two conveying sprockets or the two deflection sprockets only with their second roller diameter.

According to the teaching of EP 1876135B 1, the first conveying sprocket and the first diverting sprocket have a larger pitch circle diameter than the second conveying sprocket and the second diverting sprocket. The deflecting element arranged between the first deflecting chain wheel or conveying chain wheel and the second deflecting chain wheel or conveying chain wheel serves here only for introducing chain rollers into the first and second deflecting chain wheels or into the first and second conveying chain wheels in order to completely eliminate the polygon effect.

Drawings

An escalator or moving walkway with at least one conveying sprocket and/or deflecting sprocket with increased service life is explained in detail below with the aid of exemplary embodiments and with reference to the drawings. Wherein:

fig. 1 shows an escalator with a revolving step band, which is arranged between a first turnaround region and a second turnaround region, in a schematic view in a side view;

FIG. 2 shows in a schematic view in side view a portion of the conveyor sprocket and the articulated chain of the step band of the second turnaround region shown in FIG. 1;

FIG. 3 shows in three-dimensional view a turn-around region of a moving walkway with a conveying sprocket, a turn-around bend and an articulated chain according to a first embodiment with graduated chain rollers;

FIG. 4 shows in three-dimensional view a turn-around region of a moving walkway with a conveying sprocket, a turn-around bend and an articulated chain according to a second embodiment with graduated chain rollers;

fig. 5 shows in a three-dimensional view a diverting area of a moving walkway with two conveying sprockets, a diverting bend and an articulated chain which operate in the same manner, wherein the articulated chain has chain rollers according to a second embodiment;

fig. 6 shows the turning region of a moving walkway with an articulated chain with chain rollers arranged alternately offset to one another in a three-dimensional view.

Detailed Description

Fig. 1 schematically shows in side view an escalator 1 with a protective railing 2 and a handrail 3 revolving around the protective railing 2. The escalator 1 connects a lower floor E1 with an upper floor E2, wherein the carrying structure 4, which is constructed as a frame structure, serves as a carrier for the protective railing 2 and as a mounting frame for the other components of the escalator 1. The carrying structure 4 also has a first diverting area 5 and a second diverting area 6. Between the first and second turnaround regions 5, 6, a step band 7 is arranged in a revolving manner in the carrying structure 4. The step band 7 has at least one articulated chain 8, which is only partially shown in fig. 1 and on which a step 9 is arranged. The step band 7 has a forward conveying portion 10 by which people or articles are conveyed, and a return portion 11 for returning the steps 9. The steps 9 and the articulated chain 8 are guided in the forward feed section 10 by means of running rails 12 and in the return feed section 11 by means of running rails 13.

In order to divert the step band 7, at least one diverting sprocket or diverting guide, which is only schematically illustrated here for the sake of overview, is arranged in the first diverting region 5. In the second diverting area 6, a conveying sprocket 14 is arranged, which conveying sprocket 14 is connected to a drive motor 16 by means of a drive train 15. The transfer sprocket 14 engages in the articulation chain 8, whereby the rotational movement of the drive motor 16 is transmitted in a positive-locking manner to the articulation chain 8 and thus to the step band 7.

In fig. 2, the detail view a of fig. 1 is shown enlarged and illustrates the basic principle of the invention. The transfer sprocket 14 has an odd number of teeth 21 and a tooth gap 22. The teeth and tooth spaces are arranged on the circumference of the conveying sprocket 14 at the same pitch T in relation to the pitch circle diameter 23.

The articulated chain 8 is schematically illustrated for a better overview and comprises a chain link 25, a hinge 26 and an engagement portion 27 arranged in the region of the hinge 26. The jogged portion 27 may be a chain roller, a chain pin, a chain bushing, a sliding element (such as a slide or a slider, etc.). In the illustrated embodiment, the engagement portion 27 is aligned with the base radius R in the tooth gap 22_GIn accordance therewith, the pivot axis of the hinge 26, which is arranged orthogonally with respect to the plane of the drawing sheet, lies on the pitch diameter 23.

The scarf part 27 can also be arranged on the chain connecting piece 25, for example, in the middle between the two hinge parts 26. The engagement portions 27 are arranged or formed following one another on the articulated chain 8 with a theoretically identical engagement distance E. As is clearly shown in fig. 2, the engagement distance E is not the length L of the chain link 25, but is the arc length on the pitch diameter 23 of the conveyor sprocket 14 and is equal to twice the distance T at the pitch diameter 23. In the present example, the length L of the chain link 25 corresponds to the engagement distance E in the following manner: the length L of the chain link plates 25 is equal to the chord length of the pitch circle segment of the transfer sprocket 14, which is defined by the depth of engagement E.

If the conveying sprocket 14 is now rotating, every second tooth gap 22 always comes into contact with or is in active connection with the engagement portions 27 following one another in the region of the conveying sprocket 14 wrapped around by the articulated chain 8. Since the number of teeth is odd, all the tooth spaces 22 come into abutment with the engagement portions 27 during two revolutions of the transfer sprocket 14. The same embodiment is of course also applicable to a steering sprocket.

Fig. 3 shows a three-dimensional view of the deflecting region 106 of the moving walkway, not shown in detail, with a pallet belt 107. The pallet band 107 is constructed substantially identically to a step band, wherein instead of a step a number of pallets 109 are arranged on at least one articulation chain 108. The articulated chain 108 has a number of chain links 131, which are interconnected by hinges 126. On each hinge section 126, a chain roller is arranged between the chain links 131, wherein every other chain roller is used as a hitching section 127 as described below. The chain rollers of the at least one articulated chain 108 are constructed in stages. Thus, the chain roller has a first roller diameter 128 in a first half of its chain roller width and a second roller diameter 129 in a second half of its chain roller width that is smaller than the first roller diameter 128. The chain rollers are alternately arranged in their stepped configuration between the chain links 131 such that a first portion of the chain rollers roll with their first roller diameters 128 over a first track 132 of the guide rail 134 and a second portion of the chain rollers roll with their first roller diameters 128 over a second track 133 of the guide rail 134.

In the deflection region 106, the conveyor sprocket 114 is arranged so as to be rotatable about a rotation axis X, wherein the illustration of the shaft and the bearing is omitted for a better overview. The transfer sprocket 114 is aligned with the first track 132 and is approximately the same track width as the first track. Beside the transfer sprocket 114 and in alignment with the second track 133, a turn-around piece 136 is fixed to the guide rail 134. The turn center point of the turn-around turn 136 is precisely aligned with the rotational axis X of the transfer sprocket 114. Although the pitch of the conveyor sprocket 114 is equal to the pitch of the articulations 126, only the first chain roller engages with its first roller diameter 128 in the tooth gap 122 of the conveyor sprocket 114 as an engagement 127, based on the stepped roller diameter and the alternating arrangement of the chain rollers. The second chain roller rolls over the turnaround 136 with its first roller diameter 128, whereby the second roller diameter 129 of the second chain roller is spaced from the transfer sprocket 114 throughout the turnaround area. Thus, based on this embodiment, the result is: only the first chain roller is the scarf joint 127 according to the invention. The teaching disclosed in fig. 3 is of course also suitable for a steering sprocket wheel, not shown.

The roller bodies of the chain rollers can be made of various materials, so that for example a first half with a first roller diameter 128 is made of a synthetic material and a second half with a small second roller diameter 129 is made of metal (for example steel). Of course, other materials, such as aluminum, copper, glass-fiber-reinforced, aramid-fiber-reinforced and carbon-fiber-reinforced composite materials, can also be used for the roller body, and the properties of these materials can be combined with one another accordingly. In addition, instead of a graduated roller body, it is also possible to use two roller bodies arranged next to one another with different roller diameters. The two roller bodies arranged next to one another do not have to be combined with one another in a rotationally fixed manner at a time. The chain rollers can of course also be constructed in accordance with fig. 4 described below.

The turnaround area 206 shown in fig. 4 illustrates another possible arrangement of stepped chain rollers on an articulated chain 208. The graded chain rollers previously described in connection with fig. 3 can also be arranged in the following manner: the first roller diameter 228 of the chain roller is arranged on an intermediate path 232, which intermediate path 232 is aligned with the deflection curve 236, so that all chain rollers roll with their larger roller diameter 228 on the deflection curve 236. The second half of the chain roller having the smaller roller diameter 229 is alternately disposed toward one side and the other side of the first roller diameter 228.

By this alternating arrangement, to a certain extent there are three tracks 232, 233, 234, namely a middle track 232, a first side track 233 and a second side track 234. A transfer sprocket 214 is arranged laterally of the turnaround member 236 and the transfer sprocket 214 is aligned with one of two lateral tracks 233, 234 extending parallel to the middle track 232. Only every second chain roller thus engages with the conveyor sprocket 214 with its second half having the smaller roller diameter 229. Only chain rollers are used as the hitches 227. Since the transfer sprocket 214 has a pitch equal to the hinge pitch or chain pitch of the hinge links 208, every other tooth space 222 remains unoccupied on the wrapped-around circumference of the transfer sprocket 214. Due to the odd number of teeth, each tooth space 222 engages or is operatively connected to the engagement portion 227 of the hinge chain 208 once during two revolutions.

It is also noted that the transfer sprocket 214 has a plurality of teeth 223 that each have a recess 224 on its crest 225. The recess 224 is an open portion for the connecting pin 209 of the articulation chain 208. The connecting pins 209 interconnect the chain links 231, 231' of the articulated chain 208 in pairs, so that the chain links form a stable chain part.

Fig. 5 shows another embodiment of the turning region 306, in which most of the components are the same as shown in fig. 4. Therefore, the same members have the same reference numerals, and repeated description of the members is omitted. As already shown in fig. 4, the chain rollers are arranged alternately on the articulated chain 208 in terms of their stepped shape, whereby there is a first portion 327A of the chain roller and a second portion 327B of the chain roller, which serve as a jogged portion. The difference from the exemplary embodiment of fig. 4 is that a first part 327A of the chain roller is guided with its second roller diameter 229 on a first transmission sprocket 314A or a first deflection sprocket aligned with the first side path 233, and a second part 327B of the chain roller is guided with its second roller diameter 229 on a second transmission sprocket 314B aligned with the second side path 234 and arranged parallel to the first transmission sprocket 314A and connected rotationally fixed thereto, wherein the chain roller rolls with its first roller diameter 228 on a deflection bend 236 arranged between the transmission sprockets.

According to the teachings in EP 1876135B 1, the first transfer sprocket 314A can have a first pitch diameter R1 that is greater than a second pitch diameter R2 of the second transfer sprocket 314B. To completely eliminate the polygon effect, the turnaround 236 disposed between the first transfer sprocket 314A and the second transfer sprocket 314B is used only to introduce or divert chain rollers to the first and second transfer sprockets 314A, 314B.

It goes without saying that all of the above embodiments for the first and second transfer sprockets 314A, 314B are also applicable in a rational manner to a first steering sprocket or to a second steering sprocket arranged parallel to the first steering sprocket and connected rotationally fixed thereto.

Fig. 6 shows a further embodiment of a deflection region 406 in a three-dimensional view, with an articulated chain 408 with a conveying sprocket 423, a deflection curve 436 and chain rollers 427 arranged in the articulation. The chain rollers 427 are divided into first chain rollers 427A and second chain rollers 427B. The second chain roller 427B is disposed between the chain connecting links 431 of the articulated chain 408. The first chain roller 427A is arranged on one side of the articulated chain 408 and offset relative to the second chain roller 427B, so that the first chain roller 427A rolls on a first track 434 and the second chain roller 427B rolls on a second track 433 extending parallel to the first track 434. The turn-around bend 436 is aligned with the second track 433 and the transfer sprocket 423 is aligned with the first track 434 so that the second chain roller 427B rolls over the turn-around bend 436 in the turn region 406. Only the first chain roller 427A serves as an engagement portion and is engaged in the backlash 422 of the conveying sprocket 423 in the turning region 406. Disclosed in combination with the embodiment of fig. 5 are: instead of a chain roller and a deflecting element, the exemplary embodiment shown in fig. 6 can also have two chain wheels arranged parallel to one another and connected to one another in a rotationally fixed manner. Of course, all of the previous embodiments for the transfer sprocket 423 are also applicable to the turning sprocket in a reasonable manner.

Although reference is mainly made in the description to chain rollers and the figures also show chain rollers, it applies for all embodiments: instead of or in combination with chain rollers, it is also possible to arrange sliding elements as a joggle and/or guide element on the articulated chain. All embodiments can be used for both escalators with step bands and moving walkways with pallet bands. The step and pallet belts usually have two revolving articulated links arranged parallel to one another, which are connected to one another transversely to the direction of movement by the steps or pallets arranged thereon. In the deflection region, a conveying sprocket or a deflection sprocket is provided for each of the two articulation chains in a rational manner, corresponding to the described exemplary embodiment. Since the steering sprocket does not have to transmit torque, the steering sprocket can also be replaced by a steering bend or by a steering arc or a tensioning arc. Embodiments which comprise only a conveying sprocket constructed according to the invention and which have a diverting bend or a diverting guide in the first diverting area are likewise part of the invention.

In principle, the present invention teaches: the very wide teeth can be shared by arranging more tooth spaces and thus the service life of the steering sprocket and the transmission sprocket can be increased in a simple and cost-effective manner. If the engagement distance of the articulated chain is sufficiently long, it is of course also possible to arrange more than one tooth gap between two engagement distances following one another on the conveyor sprocket or on the steering sprocket, so that not only the service life is multiplied, but also a multiplication of the service life is possible in accordance with the multiplication of the tooth gap. Such embodiments are equivalents of the embodiments in accordance with the invention.

Claims (15)

1. An escalator with a step band or a moving walkway with a pallet band, wherein the step band or pallet band has at least one articulated chain, the at least one articulated chain comprises engagement sections arranged behind one another with a theoretically identical engagement distance, on which a step or pallet is arranged, wherein the escalator or moving walkway has a first diverting area with at least one conveyor sprocket and a second diverting area, the at least one articulation chain is arranged to rotate between the deflection regions, the engagement section engages in a tooth gap of the conveyor sprocket and engages in a tooth gap of at least one deflection sprocket arranged in the first deflection region, characterized in that the at least one conveying sprocket and/or the at least one diverting sprocket has a pitch circle, the pitch circle has a pitch distance, which is equal to half the engagement distance of the joint chain, in relation to the tooth gap.

2. The escalator or moving walkway of claim 1, wherein the at least one transfer and/or turnaround sprocket has an odd number of teeth.

3. Escalator or moving walkway according to claim 1 or 2, wherein the at least one articulated chain comprises a chain roller which is arranged on the articulation of an articulated chain, forms a nest, and has a chain roller width.

4. Escalator or moving walkway according to claim 3, wherein the chain roller of the at least one hinge chain is divided into a first chain roller and a second chain roller, the first and second chain rollers being arranged staggered in an alternating sequence on the hinge chain such that the first and second chain rollers roll over tracks arranged next to each other.

5. Escalator or moving walk according to claim 4, wherein the first chain roller is guided over the conveying sprocket and over the diverting sprocket and the second chain roller is guided over a diverting turn aligned with the conveying sprocket or the diverting sprocket.

6. Escalator or moving walkway according to claim 5, wherein in the respective turnaround areas the chain rollers rest on the base circle of the conveyor or turnaround sprocket with a radius smaller than the radius of the turnaround.

7. Escalator or moving walkway according to claim 4, wherein the first chain roller is guided on a first conveyor sprocket and the second chain roller is guided on a second conveyor sprocket arranged parallel to the first conveyor sprocket and connected non-rotatably to the first conveyor sprocket.

8. The escalator or moving walk according to claim 7, wherein a first pitch diameter of the first conveyor sprocket is greater than a second pitch diameter of the second conveyor sprocket.

9. Escalator or moving walk according to claim 3, wherein the chain rollers of the at least one articulated chain are constructed in stages and have a first roller diameter in a first half of the chain roller width of the chain roller and a second roller diameter smaller than the first roller diameter in a second half of the chain roller width of the chain roller, the chain rollers being arranged alternately in relation to their stepped construction between the chain links of the articulated chain, so that the first and second chain rollers roll with their first roller diameter over parallel first and second trajectories arranged next to one another.

10. Escalator or moving walk according to claim 9, wherein the conveying sprocket and the diverting sprocket have a base circle radius, the width of the conveying sprocket and the diverting sprocket being equal to half the chain roller width of the stepped chain rollers, the sprockets being aligned with the first track, there being a diverting turn aligned with the conveying sprocket or the diverting sprocket and with the second track, respectively, so that in the diverting area the first roller diameter fits alternately on the base circle radius and on the diverting turn.

11. The escalator or moving walk according to claim 10, wherein the transfer sprockets and the turnaround sprockets have a base radius that is smaller than the radius of the turnaround.

12. An escalator or moving walkway according to claim 3, wherein the chain rollers of the at least one articulated chain are constructed in stages and have a first roller diameter in a first half of their chain roller width and a second roller diameter smaller than the first roller diameter in a second half of their chain roller width, the chain rollers being arranged alternately in relation to their stepped construction between the chain links of the articulated chain, wherein the first and second chain rollers roll with their first roller diameters on a common intermediate trajectory, the first chain roller being aligned with its second roller diameter with a first side trajectory extending parallel to the intermediate trajectory, the second chain roller being arranged with its second roller diameter in alignment with a second side trajectory extending parallel to the intermediate trajectory.

13. Escalator or moving walk according to claim 12, wherein the conveying sprocket and the diverting sprocket have a base circle radius, the width of the conveying sprocket or the diverting sprocket being equal to half the chain roller width of the stepped chain rollers and being arranged in alignment with one of the two side tracks and there being a diverting bend in alignment with the conveying sprocket or the diverting sprocket and the track in between, respectively, so that in the diverting area the first roller diameter fits over the diverting bend and the second roller diameter of one of the two side tracks fits over the base circle radius.

14. Escalator or moving walk according to claim 12, wherein the first chain roller is guided with its second roller diameter on a first transfer sprocket aligned with one of the two side tracks and on a first diverting sprocket and the second chain roller is guided with its second roller diameter on a second transfer sprocket aligned with the second side track and arranged parallel to the first transfer sprocket and connected rotationally fixed to the first transfer sprocket and on a second diverting sprocket arranged parallel to the first diverting sprocket and connected rotationally fixed to the first diverting sprocket, wherein the chain roller rolls with its first roller diameter on a diverting bend arranged between the transfer sprockets or diverting sprockets.

15. The escalator or moving walk according to claim 14, wherein the first transfer sprocket or first turnaround sprocket has a first pitch diameter that is greater than a pitch diameter of the second transfer sprocket or second turnaround sprocket.