EP1443012A1 - 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.

An escalator is known from US Pat. No. 4,249,649, the drive chain of which Has chain rollers that rotatably on the journal are stored.

With this solution it is necessary to insert the chain in the deflection wheels at the end of the escalator or moving walk especially to design, namely with a so-called transition arch.

By the even rotation of the drive wheel for the chain there is a periodic change in speed in the drive train. This is due to the so-called polygon effect, the due to the different effective lever arm of the chain in the course a chain link when it is guided around the deflection wheel. There are several ways to combat this polygon effect Measures become known. So are sometimes quite complex Designs of the drive wheels have been proposed with which the polygon effect should at least be reduced.

On the other hand, for cost reasons, it would be desirable to use as much as possible long chain links to work. Chains with long links have a higher specific strength, so a better ratio of strength to weight and are also less expensive and less maintenance after less chain links attack.

Around the polygon effect and introduced into the drive train At least to dampen vibrations, it has become known the chain rollers of the chain with a rubber tread to be provided, so that the chain roller on the running rail too runs comparatively smoothly.

This solution also offers a certain flexibility the change in the direction of movement so that peaks in the speed change something can be buffered. on the other hand become such chain rollers, especially if they are as internal Chain rollers are formed, sometimes quite strong loaded, so that they are comparatively wear-intensive.

Furthermore, it has also been suggested the casters of the steps or spatially separate pallets from the bearing journals. By this measure allows the constructive freedom in the design both the rollers and the chain bearing clearly enlarge. However, the increased width is disadvantageous the escalator because with this solution it is necessary Rollers and the storage of the steps on the drive chains on the one hand and on their rollers on the other hand on two of them to provide separate levels.

Escalators and moving walks can be significantly different Stressful situations exist. While an empty one Escalator in up-down operation already different Load conditions on the two deflection wheels for the drive chains this applies all the more to loaded escalators. Especially with increased escalator lengths and heights, such as, for example used for subway stations are driven to exert enormous forces on the escalator during the ascent, which are also transferred accordingly from the drive chain and must be supported by the running rails.

For example, if an escalator is loaded with 100 people a tensile force of about 700 kN can be expected. To such To absorb forces, a drive that is as rigid as possible is desirable, also about the required tolerances in the management to be able to comply. However, this requirement is in conflict to the comfort requirements of the escalator operators, which one wish for noiseless and "gentle" escalator running.

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

This object is achieved by claim 1. advantageous Further training results from the subclaims.

According to the invention, it is particularly favorable that also when Partial load operation or at minimum load operation according to the invention only the chain rollers - the ones with a corresponding protective cover can be provided on the tread - on the sprocket or chain idler wheel. This first ensures that the escalator is in this load state can run to the desired comfort.

On the other hand, it is envisaged that additional load at points more rigid chain rollers are used with the chain rollers reach. The dimensioning of the chain idlers can be so done that by the deflection of the running surface of the chain rollers to a certain extent, the chain idlers in the system with appropriate parts of the sprocket so that practically automatically prevents the running surfaces of the chain rollers be overburdened. The point of use of the chain idlers can be adapted to requirements in a wide range become. For example, it can be about half of the possible deflection.

The use of chain sprockets means that the working point, So also the running height of the steps, not more than a given dimension differs from the nominal running height, so that, for example, the teeth of the comb plate are not excluded Intervention. Having the escalator in this condition is heavily burdened anyway and therefore regularly alone emits an increased noise level from the drive train, it is not critical that the additional support of the chain sprockets the running noise is significantly higher than when idling the escalator or moving walk.

Despite the increased chain pitch, it can be used as a whole achieve an improvement in comfort, and through the possibility of implementation an inner chain roller is a diminution the required width of the escalator possible.

In a preferred embodiment of the invention, it is provided that the chain sprockets in the area of the sprockets or chain deflection wheels are mainly used. You can do this the chain idler wheels have U-shaped teeth on average. The support sheets or tooth bases of the teeth then only reach under the chain sprockets so that the treads of the chain rollers be spared there.

In this embodiment, too, however, it is preferred that the Support on the transition arch and thus the optimal entry of the Step chain into the sprockets over the softer ones Chain rollers are done.

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 result from the following description of an exemplary embodiment with reference to the drawings:

Fig. 1

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

Fig. 2

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

Fig. 3

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

Fig. 4

a further embodiment of an escalator according to the invention or a moving walk according to the invention, the representation according to FIG. 1 being chosen;

Fig. 5

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

Fig. 6

a representation corresponding to FIG. 3 for the exemplary embodiment according to FIG. 4;

Fig. 7

a further embodiment of an escalator according to the invention or a moving walk according to the invention, the representation according to FIG. 1 being chosen;

Fig. 8

a representation corresponding to FIG. 5 for the exemplary embodiment according to FIG. 7;

Fig. 9

a representation corresponding to FIG. 6 for the exemplary embodiment according to FIG. 7;

Fig. 10

a further embodiment of an escalator according to the invention or a moving walk according to the invention, the representation according to FIG. 1 being chosen;

Fig. 11

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

Fig. 12

a representation corresponding to FIG. 9 for the exemplary embodiment according to FIG. 10;

In Fig. 1, an escalator 10 is shown, namely in the part relevant to the invention. The escalator has one Escalator level 12, which is stored in a conventional manner is. A drag roller 14 of the stage which is not relevant here runs on a secondary track 16. The escalator step 12 is guided and driven by a journal 18 on which a chain roller 20 is rotatably mounted. The chain roller 20 runs in a track 22 and is at the same time inside a drive chain 24 for the escalator.

On the chain sleeve 30 there is also a roller bearing 34, here a ball bearing, plugged on, which supports the chain roller 20.

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

According to the invention, it is provided in addition to the chain roller 20 and preferably immediately adjacent to the ball bearing 34 chain rollers 38 and 40 provide the entire cylindrical Area each between the ball bearing 34 and the two chain links Fill 28 and center the ball bearing 34 at the same time.

The function of the chain sprockets is shown in FIGS. 2 and 3 explained.

In the illustrated embodiment, the running rail has 22 has a substantially U-shaped construction in the running area. This solution has the advantage that the tread material 36 Do not dodge sideways under heavy loads can, so that there is a spring characteristic with a slope.

2, a sprocket 42 is cut out in the upper region shown, namely in association with a transition curve 44.

The transition arc 44 is used for improvement in a manner known per se the entry of the drive chain to the sprocket 42. It has a horizontal section and a curved one Section 46, the reduction in a conventional manner of the polygon effect.

The transition curve 44 is again in the lower area of FIG. 2 shown in top view.

As can be seen, the transition arc 44 is in this embodiment divided in two. It stretches as better 3 can be seen in this way, one laterally central section 48 of the sprocket, which is also the same height both the sprocket and the transition arch the tread surface 36 of the chain roller 20 can wear. This will make a smooth transition achieved.

From Fig. 3 it can be seen that the sprocket 42 essentially is formed in three parts. The teeth 50 and 52 are on the outside trained, while the central area has another set of teeth 54 has. The teeth 50 and 52 each have a tooth base 56 and 58, while the toothing 54 has a tooth base 60, which, on the other hand, is radially inward.

According to the invention, it is provided that the radial distance between the tooth bases 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 chain sprockets 38th and 40.

The following effect can be achieved by this measure:

When the load is low, the drive chain lies - and therefore also the chain rollers - only on the tooth base 54. If the Load increases, the tread covering 36 deflects somewhat, and the chain sprockets 38 and 40 lie on the tooth bases 55 and 58. This measure ensures that at low load a smooth and comfortable realization of the Chain drive is ensured. Because of the soft pad vibrations are dampened and the polygon effect is further reduced.

The chain sprockets 40 only come in when the load is high System with tooth bases 56 and 58. In this load condition the pad is quite stiff, so the tread coverings 36 not or not significantly further indented and therefore cannot be destroyed quickly.

In the illustrated embodiment, the three-part Sprockets each with screw connections or rivets 66 attached to each other. It goes without saying that any other Design is also possible here.

4, 5 and 6 show essentially the same configuration 1, 2 and 3 in a corresponding manner, wherein however, there is a larger diameter of the chain rollers 20, which allows an even higher resilience.

In the illustrated embodiments, chain division can be Extend to 135 mm without sacrificing comfort arises. This contributes significantly to the cost reduction.

4 is a further embodiment of the running rail 22 can be seen. This track 22 leads to an even further increased spring comfort, although the tread covering 36 is pressed in more under load.

Other embodiments can be seen from FIGS. 7 to 12. In all figures, the same or corresponding parts the same reference numerals are used. An essential difference between the two embodiments between FIGS. 1 to 3 or 4 to 6 on the one hand and the other figures in the design of the sprocket 42 and the transition arch 44. This will be explained with reference to FIG. 8.

The transition arch 46 has the same side view Design like the transition curve according to FIG. 2 or 5. The horizontal section 68 of the transition arch is not divided into three, but has a width that is slightly larger than that Width of a chain roller 20 is. In this respect is horizontal Section 68 of the transition arch from its tread 70 essentially conventionally trained. Points at its bottom However, he has arcuate recesses 72 on his Outsides. These recesses serve to create appropriate areas of the sprocket 42 to record, for which reference to Fig. 9 is.

The transition arch 46 runs in the tongue in the curved region 74, which in the illustrated embodiment is half the width of the transition curve in section 68. The tongue 74 continues the recesses 72. As can be seen from Fig. 9 is, their tread 70 is at the same level as shoulders 76 and 78 of the chain wheel. The chain wheel according to FIG. 9 has an on average U-shaped structure. 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, inclusive a certain side game.

Similar to the configuration according to the embodiment according to 3 and 6, teeth 50 and 52 have tooth bases 56 and 58, which carry the chain idlers 38 and 40. In this However, the embodiment is the distance between the Shoulders 76 and 78 and the tooth bases 56 and 58 on the one hand chosen that the chain rollers 20 when deflecting the chain over the sprockets 44 are practically not loaded. hereby The chain roller 20 adopts the deflection effect over the curved one Section 46 of transition arch 44, but the chain idlers lie on the sprockets and can there accordingly be heavily burdened.

All of the illustrated embodiments have in common that Damping buffer in the chain wheel due to the smooth running-in of the Drive chain are unnecessary.

Claims (11)

Escalator or moving walk, with two drive chains on both sides of a step or pallet belt guided on running rails, which drive chains each have chain rollers, which can rotate on bearing journals of the steps or pallets and are part of the drive chain, characterized in that chain sprockets on the side next to the chain roller (20) (38, 40) are provided, which are intended at least in the case of high loads for the support on parts of the chain wheel (42). Escalator or moving walk according to claim 1, characterized in that the support is carried out on an appropriately designed area, in particular the support arch or the tooth base (56, 58) of the chain wheel (42). Escalator or moving walk according to claim 1 or 2, characterized in that in the region of the transition arch (44) only the chain rollers (20), in particular with roller bearings, bear against the transition arch (44). Escalator or moving walk according to one of Claims 1 to 3, characterized in that the chain rollers (20) have an elastically yielding tread (70), in particular made of plastic or a rubber mixture, and the chain rollers (38, 40) have a metallic surface. Escalator or moving walk according to one of the preceding claims, characterized in that projecting regions of the chain wheel (42) are formed below the chain sprockets (38, 40). Escalator or moving walk according to one of the preceding claims, characterized in that the chain rollers (20) are intended for contact with inlet or transition arches (44) at the end of the escalator (10) or the moving walk. Escalator or moving walk according to one of the preceding claims, characterized in that the drive chain (24) has an internal chain roller (20) in each joint. Escalator or moving walk according to one of the preceding claims, characterized in that the chain sprockets (38, 40) are mounted free of roller bearings (34) on the chain sleeve (30). Escalator or moving walk according to one of the preceding claims, characterized in that the transition arch (44) is divided into two and at the transition the chain roller (20) concerned rests on the transition arch (44). Escalator or moving walk according to one of the preceding claims, characterized in that the transition arch (44) is constructed in several parts. Escalator or moving walk according to one of the preceding claims, characterized in that the transition arch (44) ends in a tongue (74), the width of which is significantly smaller than the width of the chain roller (20).

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