EP1443012B1 - Escalator or moving walk - Google Patents

Abstract

Chain care rolls (38, 40) provided next to the sides of the chain roll (20) are used to support parts of the chain wheel during high load conditions. Two drive chains (24) are positioned on either side of a stepped or pallet belt guided along a runner rail (22). Each chain is associated with a chain roll which rotatably mounted on bearing journals (18) for the steps or pallets and which forms part of the chain.

Description

The invention relates to an escalator or moving walk, according to the preamble of claim 1.

From US-PS 4,249,649 an escalator is known, the drive chain has chain rollers which are rotatably mounted on journals.

Another escalator is also known from US-A-5806653, for example. In this solution, it is necessary to make the inlet of the chain in the deflection wheels end of the escalator or the moving walk particularly, namely with a so-called transitional arc.

The uniform rotation of the drive wheel for the chain produces a periodic speed change in the drive train. This is due to the so-called polygon effect, which results from the different effective lever arm of the chain in the course of a chain link in the leadership of the deflection wheel. To combat this polygon effect, various measures have become known. Thus, sometimes quite complicated designs of the drive wheels have been proposed, with which the polygon effect is to be at least reduced.

For cost reasons, on the other hand, it would be desirable to work with the longest possible chain links. Chains with long chain links have a higher specific strength, so a better ratio of strength to weight and are also cheaper and low-maintenance, after fewer chain joints incurred.

In order to dampen the polygon effect and vibrations introduced into the drive train at least somewhat, it has become known to provide the chain rollers of the chain with a running surface made of rubber, so that the chain roller also runs comparatively smoothly on the running rail.

Although this solution also provides some flexibility in changing the direction of travel, peaks of the speed change can be somewhat buffered. On the other hand, such chain rollers, especially if they are designed as internal chain rollers, partially loaded quite heavily, so that they are relatively wear-intensive.

Furthermore, it has also been proposed to spatially separate the rollers of the steps or pallets from the journals. By this measure, the constructive freedom in the design of both the rollers and the chain bearing can be significantly increased. However, a disadvantage is the increased width of the escalator, because in this solution, it is necessary to provide rollers and the storage of the steps on the drive chains on the one hand and on their rollers on the other hand at two separate levels.

Escalators and moving walks can be subject to significantly different stress situations. While an empty escalator in up-down operation already has different load conditions on the two pulleys for the drive chains, this applies even more for loaded escalators. Especially at elevated escalator lengths and heights, as they are used for example for subway stations, enormous forces are to be applied by the drive of the escalator in the upward travel, which are also transmitted accordingly by the drive chain and must be supported by the rails.

For example, when loading an escalator with 100 people, a pulling force of about 700 kN must be expected. In order to absorb such forces, as rigid a drive as possible is desirable. also to be able to meet the required tolerances in the leadership. However, this requirement is in contrast to the comfort requirements of escalator operators who want the quietest possible and "smooth" escalator run.

The invention is therefore based on the object to provide an escalator or a moving walk according to the preamble of claim 1, which combines the demand for an improved drive comfort with the demands for a strong duty drive.

This object is achieved by claim 1. Advantageous developments emerge from the subclaims

According to the invention, it is particularly favorable that even in partial load operation or during minimum load operation according to the invention, only the chain rollers - which can be provided with a corresponding rest pad on the running surface - rest on the sprocket or chain idler. This initially ensures that the escalator can run in this load condition with the desired comfort.

On the other hand, it is envisaged that at higher load points in addition to the chain rollers stiffer chain lock rollers are used. The dimensioning of the Kettenschonrollen can be done so that by the deflection of the tread of the chain rollers at a certain level, the Kettenschonrollen get into contact with corresponding parts of the sprocket so that virtually automatically prevents the running surfaces of the chain rollers are loaded too much. The point of application of the chain lock rolls can be adapted to the requirements in a wide range. For example, it can be about half of the possible deflection.

The use of the chain lock rollers ensures that the operating point, ie also the running height of the steps, does not differ from the nominal running height by more than a specified amount that, for example, the tines of the comb plate can not be disengaged. After the escalator is already heavily loaded in this state anyway and therefore regularly sends out an increased noise level alone from the drive train, it is uncritical that the running noise is significantly higher than when idling the escalator or the moving walkway by the additional edition of the chain saver.

Despite the increased chain pitch can thus achieve a total comfort improvement, and by the possibility of realization of an internal chain roller is a reduction in the required width of the escalator is possible.

In a preferred embodiment of the invention, it is provided that the Kettenschonrollen be used in the field of sprockets or chain pulleys focus. For this purpose, the chain pulleys may have U-shaped teeth in section. The support sheets or tooth surfaces of the teeth then only engage under the chain lock rollers, so that the running surfaces of the chain rollers are spared there.

Also in this embodiment, however, it is preferred that the support on the transition arc and thus the optimal inlet of the step chain in the sprockets via the softer equipped chain rollers.

Fig. 1

eine Schnittansicht eines Teils einer ersten Ausführungsform einer erfindungsgemäßen Fahrtreppe oder eines erfindungsgemäßen Fahrsteigs, unter Darstellung der Kettenrollen, der Kettenschonrollen und der Laufschiene im Schnitt;

Fig. 2

die Ausführungsform gemäß Fig. 1, wobei der Übergangsbogen und das Kettenrad dargestellt ist;

Fig. 3

ein Schnitt durch das Kettenrad und dem Übergangsbogen gemäß Fig. 2;

Fig. 4

eine weitere Ausführungsform einer erfindungsgemäßen Fahrtreppe oder eines erfindungsgemäßen Fahrsteigs, wobei die Darstellung gemäß Fig. 1 gewählt wurde;

Fig. 5

eine Fig. 2 entsprechende Darstellung zum Ausführungsbeispiel gemäß Fig. 4;

Fig. 6

eine Fig. 3 entsprechende Darstellung zu dem Ausfühungsbeispiel gemäß Fig. 4;

Fig. 7

eine weitere Ausführungsform einer erfindungsgemäßen Fahrtreppe oder eines erfindungsgemäßen Fahrsteigs, wobei die Darstellung gemäß Fig. 1 gewählt wurde;

Fig. 8

eine Fig. 5 entsprechende Darstellung zum dem Ausführungsbeispiel gemäß Fig. 7;

Fig. 9

eine Fig. 6 entsprechende Darstellung zu dem Ausfühungsbeispiel gemäß Fig. 7;

Fig. 10

eine weitere Ausführungsform einer erfindungsgemäßen Fahrtreppe oder eines erfindungsgemäßen Fahrsteigs, wobei die Darstellung gemäß Fig. 1 gewählt wurde;

Fig. 11

eine Fig. 8 entsprechende Darstellung zum Ausführungsbeispiel gemäß Fig. 10; und

Fig. 12

eine Fig. 9 entsprechende Darstellung zu dem Ausfühungsbeispiel gemäß Fig. 10;

Further advantages, details and features will become apparent from the following description of an embodiment with reference to the drawings:

Fig. 1

a sectional view of a portion of a first embodiment of an escalator according to the invention or a moving walkway according to the invention, showing the chain rollers, the Kettenschonrollen and the running rail in section;

Fig. 2

the embodiment of Figure 1, wherein the transition arc and the sprocket is shown.

Fig. 3

a section through the sprocket and the transition arc of FIG. 2;

Fig. 4

a further embodiment of an escalator according to the invention or a moving walk according to the invention, wherein the representation was selected in accordance with Figure 1;

Fig. 5

a representation corresponding to FIG. 2 for the embodiment of FIG. 4;

Fig. 6

a representation corresponding to FIG. 3 to the Ausfühungsbeispiel according to FIG. 4;

Fig. 7

a further embodiment of an escalator according to the invention or a moving walk according to the invention, wherein the representation was selected in accordance with Figure 1;

Fig. 8

a representation corresponding to Fig. 5 for the embodiment of FIG. 7;

Fig. 9

a representation corresponding to FIG. 6 to the Ausfühungsbeispiel according to FIG. 7;

Fig. 10

a further embodiment of an escalator according to the invention or a moving walk according to the invention, wherein the representation was selected in accordance with Figure 1;

Fig. 11

a representation corresponding to FIG. 8 for the embodiment of FIG. 10; and

Fig. 12

a representation corresponding to FIG. 9 to the Ausfühungsbeispiel of FIG. 10;

In Fig. 1, an escalator 10 is shown, in the relevant part of the invention. The escalator has an escalator step 12, which is mounted in a conventional manner. A not further relevant tow roller 14 of the stage runs on a secondary rail 16. The escalator stage 12 is guided and driven by a bearing pin 18 on which a chain roller 20 is rotatably mounted. The chain roller 20 runs in a running rail 22 and is at the same time formed inside a drive chain 24 for the escalator.

On the chain sleeve 30 also has a rolling bearing 34, here a ball bearing, attached, which supports the chain roller 20.

This design is commonly referred to as an internal chain roller drive. In the solution according to the invention, it is provided that the chain roller also has a tread surface 36, which is slightly more elastic and consists for example of rubber. The tread covering springs under load somewhat, but reduces the running noise.

According to the invention, it is provided next to the chain roller 20 and preferably immediately adjacent to the ball bearing 34 Kettenschonrollen 38 and 40 which fill the entire cylindrical area between the ball bearing 34 and the two chain links 28 and at the same time centering the ball bearing 34.

The function of the Kettenschonrollen will be explained with reference to FIGS. 2 and 3.

In the illustrated embodiment, the track rail 22 in the running area in a substantially U-shaped structure. This solution has the advantage that the material of the tread cover 36 can not move laterally under heavy load, so that there is a spring characteristic with slope.

In Fig. 2, a sprocket 42 is shown in fragmentary form in the upper region, in association with a transition arc 44th

The transition arc 44 is used in a conventional manner to improve the entry of the drive chain on the sprocket 42. It has a horizontal portion, and a bent portion 46 which serves in known manner to reduce the polygon effect.

The transition arc 44 is shown in the lower area of Fig. 2 again in plan view.

As can be seen, the transition arc 44 is divided into two in this embodiment. It extends, as it can be better seen in Fig. 3, in this way laterally of a central portion 48 of the sprocket, the same amount of height both the sprocket and the transition arc can bear the tread surface 36 of the chain roller 20. This achieves a smooth transition.

From Fig. 3 it can be seen that the sprocket 42 is formed substantially in three parts. On the outside, the teeth 50 and 52 are formed, while the central area has a further toothing 54. The teeth 50 and 52 each have a tooth base 56 and 58, while the toothing 54 has a tooth base 60, which in contrast is radially inwardly.

According to the invention, it is provided that the radial distance between the tooth bottoms 56 and 58 on the one hand and 60 on the other hand is slightly less than the distance between the surface of the tread surface 36 and the surface of the Kettenschonrollen 38 and 40th

This measure can achieve the following effect:

At low load, the drive chain - and thus the chain rollers - only on the tooth base 54. As the load becomes higher, the tread lining 36 somewhat springs, and the skip rollers 38 and 40 rest on the tooth bottoms 56 and 58 on. This measure ensures that a gentle and comfortable realization of the chain drive is ensured at low load. The soft support dampens vibrations and further reduces the polygon effect.

Only under heavy load, the chain lock rollers 40 come into contact with the tooth bases 56 and 58. In this state of stress, the support is quite stiff, so that the tread linings 36 are not or not significantly further pressed and therefore can not be destroyed quickly.

In the illustrated embodiment, the three-piece sprockets are each attached via screw or rivets 66 to each other. It is understood that any other embodiment is also possible here.

Figs. 4, 5 and 6 show substantially the same configuration as Figs. 1, 2 and 3 in a corresponding manner, but all a larger diameter of the chain rollers 20 is present, which allows an even higher load capacity.

In the illustrated embodiments, chain pitch can be extended to 135 mm without creating a loss of comfort. This contributes significantly to the cost reduction.

In Fig. 4, a further embodiment of the track rail 22 is also apparent. This running rail 22 leads to a further increased spring comfort, however, the tread surface 36 is pressed more under load.

From FIGS. 7 to 12, other embodiments are apparent. In all figures, like reference numerals are used for the same or corresponding parts. A significant difference between the two embodiments between Figs. 1 to 3 and 4 to 6 on the one hand and the other figures in the configuration of the sprocket 42 and the transition arc 44. This will be explained with reference to FIG.

The transitional bend 46 has the same configuration in side view as the transitional bend according to FIG. 2 or 5. The horizontal portion 68 of the transition sheet is not divided into three, but has a width which is slightly larger than the width of a chain roller 20. In this respect, in the horizontal section 68 of the transition arc of its tread 70 is formed substantially conventional. However, on its underside, it has arcuate recesses 72, on its outer sides. These recesses serve to receive corresponding areas of the sprocket 42, to which reference is made to FIG.

The transition arc 46 runs in the bent region in a tongue 74, which has half the width of the transition arc in the section 68 in the illustrated embodiment. The tongue 74 continues the recesses 72. As can be seen in Figure 9, its tread 70 is at the same height as shoulders 76 and 78 of the sprocket. The sprocket according to FIG. 9 has a sectionally U-shaped construction. The teeth 50 and 52 extend on both sides of a recess 80. The width of the recess 80 corresponds to the width of the chain roller 20, including a certain side play.

Similar to the embodiment according to the embodiment according to FIGS. 3 and 6, the teeth 50 and 52 have teeth bottoms 56 and 58, which carry the chain lock rollers 38 and 40. In this embodiment, however, the distance between the shoulders 76 and 78 and the tooth bases 56 and 58 on the one hand chosen so that the chain rollers 20 are practically not charged when deflecting the chain on the sprockets 44. In this way, although the chain roller 20 takes over the deflecting action over the bent portion 46 of the transitional bow 44, but the Kettenschonrollen lie on the sprockets and can be there correspondingly heavily loaded.

All of the illustrated embodiments have in common that damping buffers in the sprocket are dispensable due to the gentle inlet of the drive chain.

Claims (11)

1. Escalator or moving walk, with two drive chains on both sides of a step or pallet belt guided on running rails, said drive chains each having chain rollers, which are capable of rotational movement on bearing journals of the steps or pallets and are part of the drive chain, characterised in that chain wear rollers (38, 40) are provided laterally next to the chain roller (20), which, at least in the case of high loads, are intended for imposition on parts of the chain wheel (42).
2. Escalator or moving walk according to Claim 1, characterised in that the imposition takes place on a correspondingly designed area, in particular on the contact bend element or the tooth base (56, 58) of the chain wheel (42) .
3. Escalator or moving walk according to Claim 1 or 2, characterised in that in the area of the transition bend element (44) exclusively the chain rollers (20), particularly fitted with roller bearings, come in contact with the transition bend element (44).
4. Escalator or moving walk according to one of Claims 1 to 3, characterised in that the chain rollers (20) have an elastically resilient running surface (70), in particular of plastic or a rubber mixture, and the chain wear rollers (38, 40) have a metallic surface.
5. Escalator or moving walk according to one of the preceding claims, characterised in that the projecting areas of the chain wheel (42) are formed beneath the chain wear rollers (38, 40).
6. Escalator or moving walk according to one of the preceding claims, characterised in that the chain rollers (20) are intended for contact with the intake or transition bend elements (44) at the end side of the escalator (10) or the moving walk.
7. Escalator or moving walk according to one of the preceding claims, characterised in that the drive chain (24) has an interior chain roller (20) in each link.
8. Escalator or moving walk according to one of the preceding claims, characterised in that the chain wear rollers (38, 40) are mounted on the chain sheath (30) free of roller bearings (34).
9. Escalator or moving walk according to one of the preceding claims, characterised in that the transition bend element (44) is divided into two and, at the transition point, the chain roller (20) concerned lies on the transition bend element (44).
10. Escalator or moving walk according to one of the preceding claims, characterised in that the transition bend element (44) is designed as being multi-part.
11. Escalator or moving walk according to one of the preceding claims, characterised in that the transition bend element (44) runs in a tongue element (74), the width of which is perceptibly less than the width of the chain roller (20).

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