HK1146030B - Step support or plate support for tread units of a conveying device, tread units and conveying device - Google Patents

Description

Technical field

The invention relates to a step or pallet support for vehicles as defined in the general concept of claim 1, step units, i.e. steps or pallets with such step or pallet support and vehicles with such step units.

State of the art

The devices described in the invention, which may also be referred to as conveyor systems, are escalators and platforms with a variety of step units, i.e. steps or platform pallets, connected to an endless conveyor. Users of the devices stand on step surfaces of the step units or walk on the step units in the same direction of motion as the traction devices move or move.

In the case of escalators, the step units form step steps, hereinafter referred to as steps, and in the case of staircases, the step units form stair pallets, hereinafter referred to as pallets.

Typically, such drive devices consist of drive strings formed as step or pallet chains. For simplicity, we shall refer to only drive strings below. These drive strings are driven to move the steps or pallets in the conveyor direction and are, according to the state of the art, at equal intervals with so-called step rollers or

The rolls are either driven or rolled along dedicated or intended running rails. At the ends of the drive equipment, the drive lines with the rolls run around the rolling wheels (e.g. chain wheels) and change direction.

In addition to the step or pallet chain and the slide or roller elements attached to it, two additional rolls, called towing rolls, are required per step or pallet, rolling along separate guide rails.

The stairs or pallets are relatively expensive to manufacture or cast and also expensive, as they must be very stable and twist-tight. In addition, the stairs or pallets must be very precisely manufactured to guarantee a safe, quiet, friction-free run. An essential element of each stage or pallet is the base of the stairs or pallet base, which has a solid, essential load-bearing function. The base must be very stable, sturdy, twist-tight and light, which leads to high material flow wall or material use and processing costs and die casting production costs.

Various proposals have already been made to reduce the weight of the step or pallet base.

DE 2051802 A1 proposes the use of foamed plastic for the construction of the stairway, which is lightweight but not stable and not durable.

According to GB 2216825, the pallet base consists of a frame of four metal angles within which three angular bars are provided.

Also according to JP 08-245152 A, two transverse bearings in the form of solid metal angles interacting with the step-rods are provided as a step support.

DD 69443 concerns a step for escalators, where the side cheeks are individually connected to a front part. The front part is covered by a seat element. On this angled element there is a step plate, which serves as a support for a step element.

Finally, JP 10-45365 also describes a substrate consisting of solid metal angles.

In particular, in order to produce more cost-effective initial equipment for rolling stock, it is desirable to replace the steps and pallets with cheaper parts without compromising the stability, ride quality, stability, robustness and reliability and stability of the rolling stock.

Description of the invention Technical task

The purpose of the invention is therefore to to provide a more cost-effective step or pallet support for a ride-on device of the type described above, while still meeting all requirements or requirements profiles and allowing safe, quiet, friction-free running, not susceptible to failure and guaranteeing a long running time or a long service life.

In addition, the use or consumption of materials should be kept to a minimum; to provide a more cost-effective driving system of the type described above, which allows safe, quiet, frictionless driving, is not susceptible to failure and guarantees a long service life.

Technical solution

This problem is solved according to the invention by the features of claim 1 and the features of claim 7.

A step support (step support, step support frame) or pallet support of the invention is essentially located below a step element and, in the case of a step, also behind a seat element. The step support or pallet support comprises a front transverse bearing and a rear transverse bearing or a rear transverse bridge, which together define or define a plane for accommodating a step element. The pedestrian pallet is intended for passengers or passengers transported by the vehicle. The pallet column is designed to be placed on the right side of the pallet, with one step column and one step column. The pallet rack is arranged essentially perpendicular to the transverse bearings on the left side.The cross-bearers are made of low-density sheet metal and are displaced or connected or screwed or wedged or bolted or glued to a supporting frame with the step-bearers or pallet-bearers. According to the invention, the height of the cross-bearers at their ends is less than the height of the cross-bearers in the middle, so that the cross-bearers have a belly shape. According to the invention, the center of the cross-bearers in the middle is at least 1.5 times as large and at most twice as large as the end of the cross-bearer,The test shall be carried out in accordance with the requirements of paragraphs 6.2.3 and 6.2.4 of this annex.

Beneficial Effects

This way, the mechanical stability is highest in the middle where it is most needed, and at the edge where less mechanical stability is needed, the lower height saves weight.

Preferred further training of the underbody and the driving equipment of the invention is defined by the dependent claims.

Brief description of the drawings

The invention is described in detail below by means of examples and in relation to the drawings. Fig. 1a stairway in a side view, partially cut;Fig. 2a sub-section A of the stairway according to Fig. 1 in a magnified view;Fig. 3a perspective view of a complete stage with a step-support according to the invention from below;Fig. 3a perspective view of a complete stage with a step-support according to the invention from the side to the rear;Fig. 4a perspective view of the step-support from the side up;Fig. 4a perspective view of the transverse stage of a stage or pallet;Fig. 4Ce (middle) -intermediate view of a complete stage with a step-support according to the invention;Fig. 4A perspective view of a step-support from the side down;Fig. 5A perspective view of a step-support from the side down;Fig. 4Ce (medium) -intermediate view of a stage;Fig. 4A perspective view of a stage with a lower level;Fig. 5A perspective view of a stage with a lower level;Fig. 4A perspective of a stage with a lower level;Fig. 5A perspective of a stage with a lower level;Fig. 5A perspective of a stage with a lower level;Fig. 5A perspective of a stage with a lower level;Fig. 5A perspective of a stage with a lower level;Fig.5A perspective view of the rear transverse support or bridge of a step-support made of sheet metal in the form of the invention;Fig. 5A perspective view of the mid-length support of a step-support made of sheet metal in the form of the invention;Fig. 6A perspective view of a step-wall from the inside;Fig. 6A perspective view of a step-wall from the outside;Fig. 6A perspective view of the lead-in-depth support or bridge of a step-support from the inside after elements of the steps have been drawn downwards;Fig. 6A perspective view of the medium-length support made of sheet metal made of step-support made of sheet metal in the form of the invention;Fig. 6A perspective view of a step-support from the inside;Fig. 7A perspective view of the step-support after elements of the step-support have been drawn downwards;Fig. 7A perspective view of the step-support or step-support from the inside; or 7A perspective view of the step-support after elements of a step-support have been drawn downwards;Fig. 7A perspective view of the step-supported support or elements of a step-support from the bottom;The first quick fastener that can be used,Fig. 8B,Second quick fastener that can be used,Fig. 8Cring that can be used,Fig. 8Clutch that can be used,Fig. 9Calculations of the stresses in the step-lock under different loads of the stages,Fig. 10A perspective view of a complete pallet with an inventive step-lock from above,Fig. 11Diesel from a perspective view from below,Fig. 12A perspective view of the pallet from a perspective view of a step-lock from above,Fig. 13Fig. 14Fig. 15Fig. 18Fig. 15Fig. 15Fig. 15Fig. 17Fig. 18Fig. 15Fig. 15Fig. 15Fig. 17Fig. 18Fig. 18Fig. 15Fig. 17Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig. 18Fig.

Ways of carrying out the invention

The drive train 1 shown in Figure 1 is a escalator connecting a lower level E1 to an upper level E2. The drive train 1 has side balustrades 4 and base plate 3 and an endless conveyor with drive lines. Two parallel conveyor chains or step chains 15 with chain rollers 16 are typically used as drive lines (see Figure 3B) to move the stages 2.

The handrail 10 is also designed to be continuous, moving in parallel or slightly forward with the drive strings or chain strings and the stages 2 or pallets.

The endless conveyor of the drive train 1 essentially comprises a large number of step units (stages 2) and the two laterally arranged drive lines, respectively step chains 15, between which the stages 2 are arranged and to which the stages 2 are mechanically connected.

Err1:Expecting ',' delimiter: line 1 column 886 (char 885)

In accordance with a first embodiment of the invention, shown in Figures 2 and 3A, steps 2 are now used, which instead of the usual step underlay comprises a step underlay 17 of deep-drawn elements.

The underbody or stairway 17 has, inter alia, two lateral step-rods 20 with running coils 6 (also known as towing coils) attached to them. These towing coils 6 are mechanically connected to the respective step-rods 20 and are so constructed that they run in the forward area along a first guide rail 5.1 or roll when the endless conveyor of the driving device 1 is in motion, as shown in Figure 2. The first guide rail 5.1 are also referred to in this context as running rails 5.1 to emphasise their function. The position and the running of the steps 15 with the adjacent chain coils 16 (not shown in Figure 2) are shown in Figure 2 only by the 8th row. The arrangement of the steps 15 and 15 is particularly well recognised in Figure 14 and the details of the three sets of chain coils 15 and 15 are shown in Figure 2.

Further details and details of the invention are now described in connection with the following figures. Figure 4A shows a perspective view of a complete underbody or stairway 17 according to the invention, including the two side stairwells 20.1, 20.2. Viewed in the direction of travel, when the stairway 2 moves from level E1 to level E2, the stairway 20.1 and the right stairway 20.2 are located to the left of the third element 9. Each stairway 20.1, 20.2 has a towing roller 6.1, 6.2 and a chain shaft or chain shaft 21.1, 21.2 respectively. In the runways 20.1 and 20.2 there is at least a poor central discharge, i.e. a breakthrough, as long as the stairway 20.1 is extended 20.2 to the left. This is necessary to remove the main board (Figure 26 or 20A) from the stairway 20 and 26 (Figure 26 or 26), and not only the edges of the stairway 6 and 26 (Figure 26 or 26), which are not necessarily visible when the entire board is removed.

Further details of the step undercarriage 17 of step 2 are shown in Fig. 4A. In addition to the mentioned step undercarriage 20.1 and 20.2, step undercarriage 17 includes, for example, a front transverse bearing 24, a rear transverse bearing 22 and a medium-length bearing 23 (medium bearing or medium-length bearing). These bearing 22, 23, 24 may also be made of deep-drawn sheet metal according to the invention.

The step element 9 and the seat element 14 are attached to or on the step support 17 and a method of attaching these elements 9 and 14 is shown in Figures 7A and 7B.

The supports 22, 23, 24 and the step wings 20.1, 20.2 are welded or threaded or connected or screwed or glued or glued or clipped. Preferably, point welding or hump welding is performed to connect these elements to each other. This shows another advantage of the invention: Since the step wings 20.1, 20.2 are made of sheet metal or steel sheet or NIROSTA sheet or zinc resin or copper plate, they can be welded or screwed or joined or glued or glued or glued together with other metal elements (e.g. the top supports 22, 23, 24) without any problems. The welding points are also made of zinc or lead and are very expensive to weld or weld against corrosion. The welding point is made of lead and is not necessary for welding and is not subject to any pressure or corrosion. - It's a twisted rigidity.

In Fig. 4B, the two supports 22 and 24 run parallel to each other in this level E3. Between the two supports 22, 24 is a medium-length support (medium support or middle support) 23 as a traction drive, inserted or wedged or connected or screwed or glued or slanted. In Fig. 4B, it is clear that supports 22 and 24 are equipped with a row of load-bearing shafts 18 to reduce the dynamic effect of the load-bearing shaft. These shafts are located in the bending area of the support 22 and 24.

In addition, there are so-called fixing areas 19 in which 24 islands or towers are formed in the plate or steel plate or NIROSTA plate or zinc plate or copper plate of the support 22, which rise slightly from the surrounding sheet material. In the middle of these fixing areas 19 there is a hole in each to allow a bolt or bolts 37 to be pierced (see also Figures 7A and 7B). The bolts 37 attach the step 9 to the support 22, 24 and the set 14 to the rear transverse support 22 and a console 40 (see Figure 3B).

Err1:Expecting ',' delimiter: line 1 column 367 (char 366)

Figure 4D shows a front view of the base of the step 17 in this figure, the lateral step jaws 20.1, 20.2 are visible, perpendicular to the transverse bearings 22, 24 and to the plane E3 respectively. In Figure 4D, three fastening areas 19 are visible. At these three fastening areas 19 the seat element 14 is fixed. At the bottom, the seat element 14 is fixed to a console 40. The console 40 extends between the two step jaws 20.1, 20.2 and is held there by fastening plates or angles 40.1, 40.2.

Unlike previous step-support structures, the invention uses elements (e.g. the supports 22, 23, 24 and the step-wings 20.1, 20.2) whose shape and thickness are adapted to the respective mechanical loads. Up to now, for example, the transverse supports 22, 24 of the step-support structure, which are sometimes also called transverse bridges, had a simple cross-sectional profile with a uniform cross-sectional area over the entire length (i.e. step-width). According to the invention, the transverse supports 22 and 24 are precisely and precisely adapted to the loads that occur, which saves a great deal of material.

Err1:Expecting ',' delimiter: line 1 column 846 (char 845)

The positive benefits of the present invention have been mathematically demonstrated and confirmed by finite element method (FEM) computer simulations.

Figure 9 shows the voltages calculated by FEM simulations in the rear transverse bearing 22 when the escalator stage 2 is loaded with 0,5 kN, 1 kN, 2 kN, 2,5 kN and 3 kN respectively (top-down).

The voltage values are given in Fig. 9 by different notations, the meaning of which is given in the character statement in Fig. 9 at the bottom right.

It can be seen from Figure 9 that the stresses under each stage 2 load reach their maximum values in the downward-facing abdomen of the rear transverse bearing 22.

In this range, however, the stresses never exceed 740 N/mm2, even when the stage is subjected to a load of 3 kN (see Figure 9 below), which is below the breaking limit of steel and which therefore meets the safety standards despite the thinness of the sheet used.

Viewed from the side, i.e. in cross section, both supports 22, 24 have essentially an L-shape, with one leg of the L-profile in the E3 plane and the second leg in a plane perpendicular to it.

Especially preferred are carriers 22, 24 which have an asymmetric U-shape, with one side thigh of the U-profile being significantly shorter and the other longer thigh having the described abdominal shape.

The use of the low-pressure method allows the production of L- and U-shaped profiles without any problems.

Preferably, the front transverse bearing 24 is of a smaller size than the rear transverse bearing 22 because the rear transverse bearing 22 is located in the area of the step edge (edge between the tread 9 and the seat 14) and is subjected to heavy loads, i.e. to more powerful loads than the front transverse bearing 24. Hunter, on the other hand, has a length L1 smaller than the length L2 (see Fig. 4B), where the length is measured in the direction of travel.

Figure 5C shows the middle longitudinal beam 23 (medium beam or centre beam or centre beam). The longitudinal beam 23 has the shape of a flat C-profile, the two side legs being of equal length and height respectively. In cross section, i.e. in a cross-sectional plane B-B running parallel to a transverse beam 22, 24, the longitudinal beam 23 has a symmetric U-shape. The side legs 23.3 and 23.4 of the U-profile have different weights, respectively, depending on the position of the beam and are not optimal in length.

When assembling and welding or joining or screwing or gluing or clipping the step base 17, the longitudinal support 23 shall not be installed in the position shown in Figure 5C but inverted, the flat area 23.2 of the U-profile connecting the two side legs 23.3 and 23.4 pointing away from step 9 or step 2 respectively.

Err1:Expecting ',' delimiter: line 1 column 188 (char 187)

The level 32 eye is completely defined by the deep-drawn sheet or steel sheet or NIROSTA sheet or zinc sheet or copper sheet or it is completely surrounded by the sheet.

In addition, the step wings 20.2 have a drawbar eye 30. Here again a sliding bearing box may be pressed in (see Fig. 6D) to accommodate a drawbar eye 25 (see Fig. 6A) or a roller pin. The drawbar eye 25 or the roller pin may be secured with a mother or welded or secured by welding seams. Preferably the drawbar eye 25 or the roll pin is a plug or plug. The drawbar eye 25 or the roll pin serves as a drawbar axis 6.2.

Preferably, the tractor eye 30 is also completely defined by the deep-drawn sheet or it is completely enclosed or surrounded by the sheet, as shown in Figure 6D.

In the area of the retractor 30 the step edge 20.2 may be supported or covered from the inside by a latch 27 (also known as the first latch) which may be welded into a cavity or hollow part or step or step-slope resulting from the deep draw.

The second locking plate 34 may be designed or constructed as an additional storage area.

Furthermore, the said eyes 30 and 32 can be pre-stained before being obtained by the staging of a circular sheet collar 31 or 33 respectively. Preferably the so-called eyes 30 and 32 are produced after the staging by cutting or cutting or punching or punching. Installation after the staging has the advantage of the uniformly smoothed collar thickness. This means that the eyes or the insert has the same or equal bearing lengths or bearing depths for the staging of the bearing or the bearing and the same or equal bearing depths or thickness for the bearing or the walls and the bearing or the walls.

The staircase edge is also given sufficient stability by the addition of additional shapes 28 and additional sheaths 28 and the sheet 26 also gives the thin low-draught sheet a very high or very high stability.

In Figure 7A, only half of a seat component 14 is shown from the rear. The seat component 14 is preferably a sheet element which has been brought into the desired shape by deep drawing or preferably by double drawing. As is common with stairway stages 2 or pallets, the surface of the seat component has 14 grooves and ribs which can be seen from the rear in Figure 7A. In Figure 3B, the front of the seat component 14 is shown with the grooves and ribs. The back of the seat component 14 is shown in the example shown.

As shown in Figure 7A, fasteners 37 can be inserted from the rear through holes in fastener plates 35, 38 by welding or attaching fastener plates 35, 38 to the back of the seat element 14, these fasteners 37 are protected from falling off. Now, if the seat element 14 is pressed against the bottom of the step 17 with its back, the fasteners 37 are taken up by holes provided for in fastener areas 19 of the seat element 17 and the fastener plates 37 are pressed down through the holes in the fastener areas 19 of the seat element 17 to the extent that the fastener can be quickly pressed on the inside of the seat or other means of fastening (frame or other means) of the seat or the seat 37 or 37.1 or 37.2 of the fastener.

In Figure 7B, only half of a step element 9 or a step surface is shown from below. The step element 9 or the step surface is preferably a sheet metal element that has been brought into the desired shape by dragging. As is common with step 2 or pallets, the surface of the step element 9 or the step surface has grooves and ridges, which can be seen from below in Figure 7B. In Figure 3B, the top of the step element 9 or the step surface can be seen with the ridges and ridges. On the side of the step element 9 or step surface, several fixed or movable stages are arranged in the example, each with a fixed or movable base 39 or 39 or 39 or more points of adhesion and mounting, or 36 or 39 or more points of adhesion and mounting, or the mounting and mounting points, or the mounting and mounting points, or the mounting and mounting points, or the mounting and mounting points, or the mounting and mounting points, or the mounting and mounting points, respectively.

As shown in Figure 7B, similar or identical bolts 37 can be inserted from the rear through holes in the fasteners 39. By welding or attaching the bolts 39 to the bottom of the step 9 or the step surface, these bolts 37 are protected from falling out. Now, if the step 9 or the step surface 9 is pressed against the bottom of step 17 with its back, the bolts 37 or bolts 37 are inserted from holes provided for in the fasteners 19 or 17 of step 17 respectively. In this way, the bolts 37 or 37 are inserted as far as possible through the bottom of step 17 or 371 of step 17 or 372 of step 17 or 371 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 or 372 of step 17 respectively, so that the bolts or bolts can be pressed on the bottom of the fasteners or other fasteners or bolts.

In Figures 8A to 8D, quick fasteners 37.1, 37.2 are shown which can be used according to the invention. It should be noted that the representations in Figures 8A and 8B are simplified representations. Neither the dimensions are correctly shown nor are the sheets or steel plate or NIROSTA plate or zinc plate or copper plate flattened on each other in the connection area.

Figures 8A and 8B show a pin-shaped fastener as bolts 37 or bolts, which are pierced by holes in the two parts to be connected (e.g. in the first plate 35 and in the transverse support 22) and which protrude through the sheet of the transverse support 22 and are fitted with a quick-attachment device 1 or 2 (with round or curved over-voltage or cap or without a retractor or hood or cap) on the back side or on the rear side.

Figures 8C and 8D show additional fasteners or clamping discs or grip rings 41 which can be placed or clamped on the useless pins of a clamping bolt 37 or plug bolt to secure the bolts 37 and the corresponding deep draw plate 22, 35.

Preferably, a H380 or H400 low tensile plate is used for parts of the step base 17, with the numbers 380 and 400 indicating the tensile strength in N/mm2. These plates are particularly suitable because they have a tensile strength of at least 900 N/mm2.

The thickness of the sheet used should preferably be between 0,75 mm and 1,9 mm. A thickness of 1,1 mm to 1,6 mm is particularly preferable.

If the low-level plate is selected as described above, the step jaws and step n shall meet all the stress tests of EN 115: Safety rules for the construction and installation of escalators and staircases and AN - American National Standard - ASME A17.1-2004: Safety code for elevators and escalators.

Preferably, the substrate has a surface coating, particularly the surface coatings produced by immersion coatings.

The use of cathodic immersion painting (CTL) is particularly suitable.

The result of the KTL is a very uniform coating of the sheet with uniform layer thickness and good surface qualities. After the KTL treatment, the sheet has a uniform, continuous coating.

It is also possible to apply the KTL treatment before deep drawing, and it is also possible to use or apply (pre) galvanized sheets or NIROSTA sheets or copper sheets.

As described, the invention is applicable not only to escalators but also to sidewalks. This is now explained by Figures 10 to 18. Many parts of the platform platform have their corresponding parts in the stair step; these parts bear the same reference sign but with a comma; the step element of the platform has the reference sign 9', because the step step element is designated by 9. If there is agreement with the step, the parts are not explained again.

As can be seen in particular from Figures 11 and 12, a major difference between pallet 2' and stage 2 is that in pallet 2' the two cross-beams 22' and 24' are pulled down from one sheet of sheet metal.

The advantage of a 2' pallet is that the 17' pallet base can be symmetrically formed in both the longitudinal and transverse directions, allowing the two parts of the 17' pallet base to be shaped identically.

Figures 16 to 18 show the structure of the 20.2' pallet collars, which are connected to the pallet base (e.g. welded). Each 20.2' pallet collar has a 30' towing eye and a 32' pallet eye, both surrounded by a 31' and 33' sheet collar, which was made by deep pulling. To secure the 30' towing eye, a 27' lock plate (e.g. Fig. 16) is used, and the ketch has a 27' opening to accommodate the towing axle.

The 21.3' pallet axis is contained in the 23' longitudinal beam, and the 21.1' and 21.2' chain bolt axes are connected by 21.1' and 21.2' bridges.

Claims (19)

1. Step support (17) or plate support for a step or plate, respectively, of a conveying device (1), wherein the step support (17) or plate support comprises:

   - a rear cross member (22) and a front cross member (24), which define a plane (E3) for receiving the tread element (9);

   - two outer step cheeks (20.1, 20.2) or plate cheeks, wherein one of the step cheeks (20.1) or plate cheeks is arranged on the right and one of the step cheeks (20.2) or plate cheeks on the left substantially perpendicularly to the cross members (22, 24),

   wherein the two cross members (22, 24) are made of deep-drawn sheet metal and welded or connected or riveted or screw-connected or adhesively bonded or clinched to the step cheeks (20.1, 20.2) or plate cheeks to form a load-bearing frame, characterised in that the height (H2) of the cross members (22, 24) at the ends thereof is smaller than the height (H3) of the cross members (22, 24) in the centre, so that the cross members (22, 24) have a bulged shape, and that the height (H3) of the cross members (22, 24) in the centre is at least 1.5 times as large and at most twice as large as the height (H2) of the cross members (22, 24) at the ends thereof, so that a uniform distribution of stress arises in the cross members (22, 24) under load.
2. Step support (17) or plate support according to claim 1, characterised in that at least one longitudinal strut or a centre member or a centre strut or a tension strut (23) connects the two cross members (22, 24), wherein the longitudinal strut or the centre member or the centre strut or the tension strut (23) is made of deep-drawn sheet metal.
3. Step support (17) or plate support according to one of claims 1 and 2, characterised in that the front cross member (24) and/or the rear cross member (22) is or are composed of a righthand and a lefthand member section or has or have mirror symmetry.
4. Step support (17) or plate support according to any one of claims 1 to 3, at least one cross member (22, 24) and/or at least one step cheek (20.1, 20.2) or plate cheek consists or consist of deep-drawn sheet metal, preferably of H380 or H400 steel (fine) sheet, and has or have a three-dimensional profile.
5. Step support (17) or plate support according to any one of claims 1 to 4, characterised in that provided at at least one cross member (22, 24) and/or at at least one step cheek (20.1, 20.2) or plate cheek is or are

   - a recess or recesses (29) and/or

   - a bead or beads (28) or moulding or mouldings and/or

   - a relief notch or notches (18).
6. Step support (17) or plate support according to any one of claims 1 to 5, characterised in that the sheet metal has a thickness between 0.75 millimetres and 1.9 millimetres, preferably 1.1 to 1.6 millimetres.
7. Escalator step (2) with step support (17) or moving walkway plate with a plate support according to any one of claims 1 to 6.
8. Escalator step (2) or moving walkway plate according to claim 7, characterised in that the tread element (9) and/or the riser element (14) is or are made of deep-drawn sheet metal.
9. Escalator step (2) or moving walkway plate according to claim 7 or 8, characterised in that the tread element (9) and/or riser element (14) is or are mechanically connected with the step support (17) or plate support by way of quick-action fastening means (37.1, 37.2) or clamping washers or grip rings or fastening means (41) in order to form an inherently load-bearing unit so that the tread element (9) and/or the riser element (14) is or are reversibly insertable, pluggable or exchangeable.
10. Escalator step (2) or moving walkway plate according to any one of claims 7 to 9, characterised in that the tread element (9) and/or the riser element (14) consists or consist of stainless steel sheet or of steel (fine) sheet or of (pre-) galvanised sheet metal or of copper sheet or of electrolytically dip-coated sheet metal or of hot-dip galvanised sheet metal.
11. Escalator step (2) according to any one of claims 7 to 10, characterised in that fastening rails (35, 38, 39) are welded or fastened to or integrated or installed in or mounted on

    - a rearward surface of the tread element (9) facing the step support (17) in the mounted state and/or

    - an underside of the riser element (14) facing the step support (17) in the mounted state

    and have receiving regions for the fastening bolts or plug bolts (37) and/or for the quick-action fasteners (37.1, 37.2, 41).
12. Moving walkway plate according to any one of claims 7 to 11, characterised in that

    - fastening rails (35, 38, 39) are welded or fastened to or integrated or installed in or mounted on a rearward surface of the tread element (9) facing the plate support (17) in the mounted state and have receiving regions for the fastening bolts or plug bolts (37) and/or for the quick-action fasteners (37.1, 37.2, 41).
13. Conveying device (1) with a plurality of steps (2) or plates according to any one of claims 7 to 12.
14. Conveying device (1) according to claim 13, characterised in that at least one step eye (32) or plate eye for reception of a chain pin axle (21.1, 21.2) of a chain or conveying chain is provided at at least one or each step cheek (20.1, 20.2) or plate cheek and wherein at least one or each step cheek (20.1, 20.2) or plate cheek comprises or includes or contains a chain pin axle (21.1, 21.2) and wherein the chain pin axle (21.1, 21.2) is preferably a chain pin plug axle.
15. Conveying device (1) according to claim 14, characterised in that an encircling sheet metal collar is present at at least one or each step cheek (20.1, 20.2) or plate cheek in the region of the step eye (32) or plate eye.
16. Conveying device (1) according to any one of claims 13 to 15, characterised in that at least one drag roller eye (30) for receiving a drag roller axle (25) and/or drag roller (6.1, 6.2) is provided at at least one or each step cheek (20.1, 20.2) or plate cheek and wherein at least one or each step cheek (20.1, 20.2) or plate cheek comprises a drag roller axle (25) with drag roller (6.1, 6.2).
17. Conveying device (1) according to claim 16, characterised in that an encircling sheet metal collar (31) is present at at least one or each step cheek (20.1, 20.2) or plate cheek in the region of the drag roller eye (30).
18. Conveying device (1) according to any one of claims 13 to 17, characterised in that at least one or each cross member (22, 24) has at least one bead (28) and/or at least one passage or recess (29) and/or at least one relief notch (18) and/or at least one fastening region (19) or fastening location or island or tower or elevation.
19. Conveying device (1) according to any one of claims 13 to 18, characterised in that at least one or each step cheek (20.1, 20.2) or plate cheek has at least one bead (28) and/or at least one passage or recess (29).