EP3034773A1 - Ladder or stairs - Google Patents

Abstract

Ladder (10) or staircase with two parallel to the conductor longitudinal direction (LL) parallel spaced guide bars (12) and between the ladder stiles (12) parallel in the conductor longitudinal direction (LL) spaced on the ladder stiles left and right connected ladder rungs or steps (14), wherein at least in the lower end of each ladder Holmes (12) a bearing shoe means (20) is connected and / or transverse to the conductor longitudinal direction (LL) extending truss unit (60) connected or connected, whose length (TL) is greater than the distance of the ladder struts (12 ), characterized in that in the interior of the bearing shoe means (20) from the outside in the longitudinal direction of the conductor (LL) accessible Innenanschlusseinheit for direct or indirect connection of the truss unit or other components is present.

Description

TECHNICAL AREA

The present invention relates to a ladder or stairs with two transversely spaced parallel to the conductor longitudinal direction ladder beams and spaced between the ladder struts parallel conductor longitudinally connected to the ladder spars left and right ladder rungs or steps, wherein at least in the lower end of each ladder Holmes a bearing shoe device is connected and / or a transverse to the conductor longitudinal direction extending truss unit is connected or connected, whose length is greater than the distance of the ladder struts.

STATE OF THE ART

Known ladders with trusses for stand widening have ex works recesses in the respective bars in order to retrofit a crossbar by means of a screw connection. The trusses are enclosed with the delivery. This solution is time-consuming for the customer due to additional montages to be carried out, in addition, there is an additional effort in the production for the production of the notch. In addition, there is a risk that the notch during transport can be damaged and thus the subsequent insertion of a traverse is no longer possible.

In principle, such trusses serve to broaden the position of the ladder and thus increase the safety in the conductor application, so that in future an increasing spread due to the increased safety requirements to be met is to be expected. Basically, ladders are considered accident prone. Therefore, the truss solution is sought.

Another solution on the market for such ladders is a special ladder shoe to which the crosshead can be mounted. For this purpose, the ladder shoe is made possible by means of specially adapted fastening elements, which are connected to the ladder stiles and to which the traverse is then connected. This too is very time-consuming for the respective user, since the ladder feet are often riveted to the ladder spar, screwed or pressed. In addition, in these solutions, a use of the ladder without traverse is no longer possible without replacing the ladder feet again.

If ladders are used, for example, on soft ground (for example a meadow), mandrels are mounted on the ladder rails or the traverse of the ladder to prevent slippage. Here are special holding structures are used, which must be mounted on the ladder beams directly or on the crossbar, in many cases additional holes must be made to allow the connection.

From the Catalog and price list "Layher mobile scaffolding and ladders" from April 2014, page 7 , an entry-level ladder type TOPIC 1054 is known. In this ladder, it is possible to connect the Traverse ends usually covered with the plastic shoe due to the existing in the front end recesses after deduction of plastic shoes a Traverse by means of screws. The edges of the traverse, which is designed as a sawn extruded profile, is usually very sharp-edged, which is a risk of injury. This is countered by the fact that in the sawed end of the trusses plastic caps are pushed.

PRESENTATION OF THE INVENTION

Based on the cited prior art, the present invention, the object or the technical problem of specifying a ladder or staircase of the type mentioned, which is economical to produce, ensures high stability, retrofitting options for existing ladders and allows the additional security elements such Traverse, mandrel or hook can be retrofitted or dismantled without much time.

The ladder or staircase according to the invention is given by the features of claim 1. Advantageous embodiments or further developments are the subject of claims dependent directly or indirectly from the independent claim 1.

The ladder or staircase according to the invention of the type mentioned in the introduction is accordingly distinguished by the fact that an internal connection unit accessible from the outside in the longitudinal direction of the ladder for direct or indirect connection of the truss unit or further components is provided inside the bearing shoe device.

A particularly preferred advantageous embodiment with high functionality is characterized in that the internal connection unit is designed as an internal threaded unit.

The internal connection unit can also be designed as a latching or plug-in unit.

By providing a bearing shoe device with an accessible in the ladder longitudinal direction Innenanschlusseinheit or female threaded unit, it is easily possible additional safety components such as traverse, mandrel or hook subsequently connect or remove. There is no need for additional drilling to make the connection of the additional components are performed. The additional components are mounted or dismantled in a simple manner by the connection to the Innenanschlusseinheit or female threaded unit of the bearing shoe device, if necessary.

A particularly preferred embodiment of the ladder or staircase according to the invention is characterized in that the internal connection unit or internal threaded unit is designed as a separate unit arranged in a rotationally fixed manner in a receiving space of the bearing shoe device. This design ensures economical production and guarantees a permanently reliable functionality. In an advantageous manner, the internal connection unit or internal threaded unit is designed as a steel or cast component, which ensures particularly high strength and stability.

A particularly preferred development is characterized in that the bearing shoe device has on its underside a downwardly open, transversely continuous, substantially U-shaped groove recess with two parallel spaced legs and a groove bottom, the Innenanschlusseinheit or female threaded unit on the groove bottom is accessible from the outside.

Due to the feature that a U-shaped Nutausnehmung is present on the underside, the connection of a traverse is particularly simple. In addition, at the same time the connection of additional components such as thorns or hooks just as easily possible.

The functionality with respect to a simple application while ensuring a high stability is ensured by a preferred embodiment, characterized in that the bearing shoe means, starting from the groove bottom in the conductor longitudinal direction, a first continuous recess, in particular Schraubausnehmung, the receiving space for the Innenanschlusseinheit or female threaded unit and a second continuous recess, in particular Schraubausnehmung, wherein the first recess, the internal thread of the Innenanschlusseinheit or female threaded unit and the second recess are in alignment in the conductor longitudinal direction.

An economic production according to a preferred embodiment is ensured by the fact that the bearing shoe device is designed as a 2-component plastic component, wherein the first component is designed as a support component with high strength and the second component formed by an at least partially below and outside existing over-cover of non-slip plastic is, this embodiment ensures a high stability even when using the ladder without traverse.

A particularly advantageous embodiment with regard to cost-effective production, which also ensures a very high level of safety of the components connected to the bearing shoe device, is characterized in that the bearing shoe device has an upper region and a lower region, wherein the upper region has an outer peripheral contour, the form-fitting is introduced into the inner contour of the formed as a hollow profile ladder Holmes and the lower portion of the bearing shoe means projects over the ladder spar and between the upper region and the lower region an at least partially circumferential stop surface is present, which abuts against the front end face of the ladder Holmes.

The provision according to the invention of a groove recess in the bearing shoe device enables, in a simple manner, the connection of a truss unit in connection with the internal thread unit in direct or indirect form.

A particularly preferred embodiment, which ensures a very high connection security is characterized in that the truss holding unit has a first projection unit on the upper side, whose outer peripheral contour is positively inserted into the inner contour of the Nutausnehmung the bearing shoe means, two laterally outwardly projecting second protrusion units, which on the Abut the underside of the bearing shoe device and integrally formed on the second projection units, extending downward in the conductor longitudinal direction, parallel spaced flanges, wherein the clear inner spacing of the flanges substantially corresponds to the width of the truss unit, so that the truss unit can be positively inserted into the region between the flanges of the truss holding unit are.

A particularly preferred embodiment, which allows economical production, is characterized in that the truss holding unit is formed as an extruded profile, in particular aluminum extruded profile, and / or in that the internal threaded unit is designed as a square nut.

An advantageous embodiment, which reliably ensures the reliable connection of a truss unit in a simple manner, is distinguished by the fact that the length is chosen so large that the end region of the flanges projects beyond the lower end region of the truss unit when the truss unit is inserted and protrudes A connection unit is arranged, by means of which the flanges are clamped together and thereby cause a clamping and positive locking of imported between the flanges truss unit.

Further embodiments and advantages of the invention will become apparent from the features further listed in the claims as well as by the embodiments given below. The Features of the claims may be combined in any way as far as they are not obviously mutually exclusive.

BRIEF DESCRIPTION OF THE DRAWING

Fig. 1

schematische Darstellung einer Leiter mit zwei Leiterholmen und Leitersprossen, wobei im oberen und unteren Endbereich der Leiterholme Lagerschuheinrichtungen angeschlossen sind, die den Anschluss zusätzlicher Bauteile ermöglichen und im unteren Endbereich eine Traverseneinheit an die Lagerschuheinrichtungen angeschlossen ist,

Fig. 2a

schematische Seitenansicht einer Lagerschuheinrichtung für die Leiter gemäß Fig. 1,

Fig. 2b

schematische Draufsicht auf die Lagerschuheinrichtung gemäß Fig. 2a,

Fig. 3a

schematische Seitenstirnansicht der Lagerschuheinrichtung gemäß Fig. 2a mit einer eingesetzten Innengewindeeinheit,

Fig. 3b

schematische Schnittdarstellung gemäß der Schnittführung A-A in Fig. 2a mit einer eingesetzten Innengewindeeinheit,

Fig. 3c

schematische Schnittdarstellung der Lagerschuheinrichtung gemäß Schnittführung B-B in Fig. 3a,

Fig. 4a

schematische Schnittdarstellung mit Ansichtsdarstellung der Lagerschuheinrichtung gemäß Fig. 2a mit angeschlossener Traversenhalteeinheit mit Traverseneinheit,

Fig. 4b

schematische Seitenansicht der Traversenhalteeinheit gemäß Fig. 4a,

Fig. 4c

schematische Untersicht der Traversenhalteeinheit gemäß Fig. 4a,

Fig. 5

schematische Perspektivdarstellung der Innengewindeeinheit der Lagerschuheinrichtung gemäß Fig. 3 und 4,

Fig. 6

schematischer Querschnitt durch die Lagerschuheinrichtung gemäß Fig. 2a und b mit einem als Dorn ausgebildeten angeschlossenen Bauteil,

Fig. 7

schematischer Querschnitt durch die Lagerschuheinrichtung gemäß Fig. 2a und b mit einem als Haken ausgebildeten angeschlossenen Bauteil und

Fig. 8

perspektivische Detaildarstellung des Anschlusses einer Traverseneinheit an eine Lagerschuheinrichtung gemäß Fig. 2a und b unter Einsatz einer Traversenhalteeinheit gemäß Fig. 4a, b und c.

The invention and advantageous embodiments and developments thereof are described in more detail below with reference to the examples shown in the drawing and explained. The features to be taken from the description and the drawing can be applied individually according to the invention or to a plurality of them in any desired combination. Show it:

Fig. 1

schematic representation of a ladder with two ladder bars and ladder rungs, wherein in the upper and lower end of the ladder struts bearing shoe devices are connected, which allow the connection of additional components and in the lower end of a truss unit is connected to the Lagerschuhinrichtungen,

Fig. 2a

schematic side view of a bearing shoe device for the ladder according to Fig. 1 .

Fig. 2b

schematic plan view of the bearing shoe device according to Fig. 2a .

Fig. 3a

schematic side end view of the bearing shoe device according to Fig. 2a with an inserted female thread unit,

Fig. 3b

schematic sectional view according to the cutting guide AA in Fig. 2a with an inserted female thread unit,

Fig. 3c

schematic sectional view of the bearing shoe device according to cut BB in Fig. 3a .

Fig. 4a

schematic sectional view with a view of the bearing shoe device according to Fig. 2a with connected truss holding unit with truss unit,

Fig. 4b

schematic side view of the truss holding unit according to Fig. 4a .

Fig. 4c

schematic bottom view of the truss holding unit according to Fig. 4a .

Fig. 5

schematic perspective view of the female threaded unit of the bearing shoe device according to Fig. 3 and 4 .

Fig. 6

schematic cross section through the bearing shoe device according to Fig. 2a and b with a connected as a mandrel connected component,

Fig. 7

schematic cross section through the bearing shoe device according to Fig. 2a and b with a hook formed as a connected component and

Fig. 8

perspective detailed representation of the connection of a truss unit to a bearing shoe device according to Fig. 2a and b using a truss holding unit according to Fig. 4a, b and c ,

WAYS FOR CARRYING OUT THE INVENTION

In Fig. 1 schematically a Stufenanlegelleiter 10 is shown, which has two ladder stiles 12, which have a transverse distance LQ in the transverse direction Q to its longitudinal direction LL, wherein between the ladder struts 12 in the longitudinal direction LL parallel spaced ladder rungs 14 are present, whose end portions in each case on the inside of the ladder struts 12 connected are. Both in the upper end region and in the lower end region of the ladder stiles 12 is a bearing shoe device 20 connected, whose geometry is described with reference to the following figures.

The ladder rails 12 are formed for example as rectangular hollow sections, in particular as aluminum extruded profiles.

To the bearing shoe devices 20 of the lower end portions of the ladder struts 12, a truss unit 60 is connected in the transverse direction whose length TL is greater than the transverse distance LQ of the ladder struts 12, so that the truss unit 60 laterally protrudes beyond the ladder struts 12.

The truss unit 60 is formed, for example, as a rectangular hollow profile, in particular extruded aluminum profile, whose end-side end region is covered in each case with a Abdecklagerkappe 32, this Abdecklagerkappe 32 is also formed as a bearing shoe with which the truss unit 60 rests on the ground (see Fig. 8 ).

A constructive embodiment of a bearing shoe device 20 is in the Figures 2 and 3 shown in more detail.

In principle, the upper side is indicated by the reference character O and the lower side by the reference symbol U in the figures.

The bearing shoe device 20 has a base body 34 with an upper region 21 and a lower region 23. On the upper side, a wall unit 36 is integrally formed on the base bodies 34 on both sides in the transverse direction Q, in the outer region of which a latching lug is formed. The upper portion 21 has an outer peripheral contour which is substantially rectangular in shape, wherein the outer dimensions of this rectangular contour substantially correspond to the inner dimensions of the inner cavity of the ladder stiles 12, so that the upper portion 21 can be introduced in the end region of the ladder stile 12 in its interior. Between the upper portion 21 and the The lower region 23 is provided with an outwardly projecting stop unit, up to which the upper region 21 can be introduced into the interior of the ladder stile 12.

The attachment of the bearing shoe device 20 can now take place in that the latching lugs 38 shown in the embodiment snapped in the inserted state into corresponding recesses present on the wall of the ladder stiles, whereby the bearing shoe device 20 is fixed in its entirety.

Alternatively, it is also possible to dispense with the locking lugs 38 and connect the bearing shoe device 20 via a rivet or screw to the ladder stiles 12.

In the lower region 23, a downwardly open Nutausnehmung 24 with a groove bottom 28 and laterally adjoining groove legs 26 is formed. To the groove legs 26 closes outwardly an upwardly inclined bearing surface 76 at. In the lower edge region, the base body 34 of the bearing shoe device 20 on the outside a coating 35 which consists of non-slip material, while the remaining base body made of plastic material with high strength. In other words, the bearing shoe device is designed as a 2-component shoe device.

In the central region of the base body 34, a receiving space 22 is present on the inside, which has a cuboid inner peripheral contour and is accessible from the outside from the outside. To the receiving space 22 close upwards and down in the longitudinal direction LL extending in each case a first screw recess 44 and a second screw recess 46 at.

In the receiving space 22, there is provided an inner terminal unit which, in the illustrated embodiment, is formed as an internally threaded unit 40 laterally inserted from the outer opening of the receiving space 22, which in FIG Fig. 5 is shown in more detail. The outer contour of the Female threaded unit 40 is chosen so that it is present against rotation after insertion into the receiving space 22. The internal threaded unit 40 has an internal thread 42. In the inserted state of the internal threaded unit 40, the internal thread 42 is aligned with the first screw recess 44 and the second screw recess 46. The first screw recess 44 extends from the receiving space 22 to the groove bottom 28 so that from the bottom in Longitudinal LL a screw unit 52 can be screwed into the internal threaded unit 40, 52 additional additional components can be connected to the bearing shoe device 20 by this screw unit.

The lateral opening of the receiving space 22 is covered by the inner wall of the ladder stile 12 in the inserted state of the bearing shoe device 20.

One possible component that can be connected to the lower side of the bearing shoe device 20 is a truss holding unit 50, which in FIG Fig. 4 is shown in more detail.

The truss holding unit 50, which may be formed, for example, as an extruded profile unit, has on the upper side a first protruding unit 54, the protruding outer peripheral contour of which essentially corresponds to the inner circumferential contour of the groove recess 24 of the bearing shoe device 20. As a result, this first projection unit 54 can be inserted into the groove recess 24.

To the first projection unit 54 includes each laterally on a projecting second projection unit 56 whose top geometry is formed so that the top of the second projection unit 56 inserted into the Nutausnehmung 24 Traverseshalteeinheit 50 or first projection unit 54 on the underside of the bearing surface 76 and the Outside of the coating 35 is applied. The second projection unit 56 consists of two legs, wherein on the lower legs in End region in each case one extending in the longitudinal direction LL flange 58 is integrally formed. The length of the flange 58 is in Fig. 4a with LT. The inside clearance of the two parallel flanges 58 is in Fig. 4a with FA indicated.

Via a screw recess 68, the interior of the first projection unit 54 is accessible, wherein the first projection unit 54 has a further screw recess 72 on the upper side. The screw recess 68 and the further screw recess 72 are in an inserted truss holding unit 50 in an axis with the first and second Schraubausnehmung 44, 46 and the internal thread 42 of the bearing shoe means 20. Therefore, after inserting the first projection unit 54 of the truss holding unit 50 in the Nutausnehmung 24 a Screw unit 52 are introduced via the interior of the truss holding unit 50 and bolted to the internal thread 42 of the female threaded unit 40, so that a secure connection of the truss holding unit 50 to the bearing shoe means 20 in a simple manner possible.

The clear inner spacing FA of the two flanges 58 substantially corresponds to the width TB of a truss unit 60. As a result, the truss unit 60 can be inserted between the two flanges 58. The length TL of the flanges 58 is dimensioned so large that they protrude when imported truss unit 60 on the lower end portion of the truss unit 60, wherein in the region of the supernatant Schraubausnehmungen 80 are present, so that the two flanges 58 can be clamped by a clamping screw 82 , which serves for a secure fixation of the truss unit 60 within the truss holding unit 50.

The use of a clamping screw 82 is in Fig. 8 shown.

Due to the structural design of the bearing shoe device 20 according to the invention, it is possible to use the stepladder 10 with or without truss unit 50, wherein the assembly or accomplish the disassembly of a truss unit 60 in a simple and fast manner. It is also possible, if necessary, to the bearing shoe means 20 with its female threaded unit 40, a spit 62 (see Fig. 6 ) or a hook 64 (see Fig. 7 ).

It is only necessary that the spike 62 has a corresponding external thread which can be screwed into the internal thread 42 of the internal thread unit 40. Such Spiese are often used when a point-wise secure installation of the ladder on a soft surface, for example, a meadow is required.

By attaching a hook 64, which also has a corresponding thread for screwing into the internal thread 42 of the female thread unit 40 in its free end region, in the upper end of the ladder struts, the ladder 10 to increase the stability in an existing profile 74 in a simple manner be hung.

It is also possible to screw the mandrel 62 in the opposite direction, so that it practically disappears inside the ladder stile 12 and can only be used in the opposite direction if necessary.

The described design of the bearing shoe 20 gives rise to some advantages over the prior art. Thus, a simple assembly or disassembly of a truss unit 60 is basically possible without problems for all types of conductors. In this case, a truss holding unit 50 is preferably interposed. Furthermore, a simple assembly or disassembly of a mandrel 62 or other accessories - without additional holding device - implemented. The connection is made by simply screwing in the respective accessories. If the connection of the bearing shoe device 20 to the ladder spar 12 is formed as a detachable connection, for example, as described as a detent or screw connection, the ladder shoe device 20 can be easily replaced in case of damage.

For the user resulting from the inventive design of the conductor 10 described a time savings in the assembly of a traverse or other conductor accessories and in a repair. The simple connection of trusses makes it possible to increase the stability of the ladder in a simple manner.

Claims (13)

Ladder (10) or stairs with - two conductor bars (12) spaced parallel to the longitudinal direction of the conductor (LL) and spaced parallel between the conductor bars (12) in the conductor longitudinal direction (LL) to the ladder bars or steps (14) connected on the left and right of the ladder bars, - Wherein at least in the lower end of each ladder Holmes (12) is connected to a bearing shoe device (20) and / or transverse to the conductor longitudinal direction (LL) extending truss unit (60) connected or connected, the length (TL) is greater than the distance (A ) of the ladder stiles (12), - characterized in that - Inside the bearing shoe means (20) from the outside in the conductor longitudinal direction (LL) accessible Innenanschlusseinheit for direct or indirect connection of the truss unit (60) or other components (62, 64) is present. Ladder or stairway according to claim 1, - characterized in that - The Innenanschlusseinheit is designed as an internal threaded unit (40). Ladder or staircase according to claim 1 or 2, - characterized in that - The Innenanschlusseinheit or internal threaded unit (40) as a separate, in particular, laterally open, receiving space (22) of the bearing shoe device (20), in particular rotationally fixed, arranged unit is formed. Ladder or staircase according to one or more of the preceding claims, - characterized in that - The Innenanschlusseinheit or internal threaded unit (40) is designed as a steel or cast component. Ladder or staircase according to one or more of the preceding claims, - characterized in that - The bearing shoe means (20) on its underside (U) has a downwardly / outwardly open, in the transverse direction (Q) continuous, substantially U-shaped Nutausnehmung (24) with two parallel spaced legs (26) and a groove bottom (28) , wherein the Innenanschlusseinheit or the female threaded unit (40) via the groove bottom (28) is accessible from the outside. Ladder or stairway according to claim 5, - characterized in that - The bearing shoe means (20) starting from the groove base (28) in the conductor longitudinal direction (LL) a first continuous recess, in particular Schraubausnehmung (44), the receiving space (22) for the Innenanschlusseinheit or female threaded unit (40) and a second continuous recess, in particular Schraubausnehmung ( 46), wherein the first recess, the internal thread (42) of the Innenanschlusseinheit or female threaded unit (40) and the second recess are in alignment in the conductor longitudinal direction (LL). Ladder or staircase according to one or more of the preceding claims, - characterized in that - The bearing shoe means (20) is designed as a 2-component plastic component, wherein the first component is designed as a support component with high strength and the second component is formed by an at least partially below and outside existing over-cover of non-slip plastic. Ladder or staircase according to one or more of the preceding claims, - characterized in that - The bearing shoe means (20) has an upper portion (21) and a lower portion (23), wherein the upper portion (21) has an outer peripheral contour which is positively inserted into the inner contour of the formed as a hollow profile ladder Holmes (12) and the lower Area (23) of the bearing shoe means (20) on the ladder spar (12) protrudes and between the upper portion (21) and the lower portion (23) an at least partially circumferential abutment surface (25) is provided, which at the front end face of the ladder Holmes (12 ) strikes. Ladder or staircase according to one or more of the preceding claims, - characterized in that - On the female threaded unit (40) via a in the internal thread (42) of the female threaded unit (40) engaging screw unit (52) a truss unit (60) is connected directly or indirectly via a truss holding unit (50). Ladder or staircase according to claim 9, - characterized in that - The cross-member holding unit (50) on the upper side a first projection unit (54) whose outer peripheral contour is positively inserted into the inner contour of the Nutausnehmung (24) of the bearing shoe means (20) has two laterally outwardly projecting second projection units (56) on the underside the bearing shoe means (20) and on the second projection units (56) integrally formed downwardly in the conductor longitudinal direction (LL) extending, parallel spaced flanges (58), wherein the inside clearance (FA) of the flanges (58) is substantially the width ( TB) of the truss unit (60), so that the truss unit (60) are positively inserted into the region between the flanges (58) of the truss holding unit (50). Ladder or stairway according to claim 9 or 10, - characterized in that - The truss holding unit (50) is formed as an extruded profile, in particular extruded aluminum profile. Ladder or staircase according to one or more of the preceding claims, - characterized in that - The internal threaded unit (40) is designed as a square nut. Ladder or stairs according to claim 10, - characterized in that - The length (LT) of the flanges (58) is chosen so large that the end portion of the flanges (58) with inserted truss unit (60) projects beyond the lower end region of the truss unit (60) and arranged in Überagenden a connecting unit (66) is, by means of which the flanges (58) are clamped together and thereby a clamping and positive locking of between the flanges (58) imported truss unit (60) is effected.

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