EP2009223A2 - Step ladder with support foot - Google Patents

Abstract

The step ladder (1) has a string unit (2), which are arrange to the stair treads (3) and with an articulated supporting unit (6) arranged at the string unit. The string unit comprises two support legs (4,5) at the lower end. The supporting unit comprises a third support leg, which is parallelly arranged to the stair treads, which longitudinally corresponds to the distance between the two support legs.

Description

The invention relates to a stepladder with a spar device are arranged on the treads and with a pivotally mounted on the spar device supporting device, the spar device at the lower end having a first and a second support leg,

Out DE 102 10 867 A1 is a stepladder with a support member and a step part known, which are hinged together, wherein the support and the step part in the swung-open state occupy an acute-angled triangle. The stepladder is characterized in that the support member is formed shorter in length than the step portion, wherein with the support member in the length of variable legs cooperate, which are arranged individually leveling to the support surface adjustable on the support member. As a result of the training that the support member is formed shortened, there is the possibility, for example, to use the stepladder in the range of stairs, without affecting the stability is impaired. In order to be able to set up the stepladder safely, in particular in the step area, stand legs which are variable in length are arranged on the support part, said legs being arranged so as to be adjustable in leveling relation to the support part individually relative to the standing surface. A similar ladder is also off DE 202 19 086 U1 known. The known stepladders have the disadvantage that the setting is relatively cumbersome, since always the lengths of two legs must be coordinated.

Out DE 44 02 760 A1 is a ladder known, which can be placed on uneven ground with the help of a variable-length and articulated to the spars of the rung ladder support. The ladder has the disadvantage that it does not provide sufficient stability.

It is the object of the present invention to provide a stepladder, the can also be used universally on uneven ground - especially on stairs or stair landings - and at the same time offers good stability.

The object is achieved by a stepladder, which is characterized in that the support device has a parallel to the treads arranged third support leg whose length corresponds at least to the distance between the first and second support leg, wherein the length of the support device is adjustable.

The stepladder according to the invention has the advantage that it is extremely easy to operate, in particular since, in an advantageous embodiment, it has only a single telescopically telescoping supporting element. The stepladder is thus adjustable to almost all climbing requirements in the home and at the same time safe. It has been shown that even on spiral staircases no adjustment of several feet is required.

A particular embodiment of the stepladder according to the invention has a telescopically telescoping support element. In this case, it can be advantageously provided that the telescopically telescoping support element and the third support leg are arranged in a T-shape relative to one another. This design is particularly convenient and stable.

Preferably, the telescopically telescoping support member in different length settings - again releasably - temporarily locked. In a particular embodiment, it is provided that an - preferably spring-loaded - locking bolt is provided on an outer tube of the telescopically nestable support element, which engages in one of a plurality of holes of an inner tube. However, it may also be provided that a - preferably spring-loaded - locking pin is provided on an inner tube of the telescopically telescoping support member, which engages in one of a plurality of holes of an outer tube. This version is particularly safe against unintentional adjustment.

In a particular embodiment, a tread platform is provided. In a particularly advantageous embodiment, the tread platform is articulated to the support device - and not as usual on the handlebar - arranged. It is preferably provided that the Tread platform in the Aufspreizstellung the stepladder on the spar device - for example, a cross member on the spar device - is supported and preferably secured there with platform locking. This special arrangement of the tread platform has the very special advantage that an unintentional collapse of the stepladder is impossible, because the tread platform is pressed under load in the platform lock. The platform lock can be embodied, for example, as latching noses arranged on the tread platform, which engage around a cross strut arranged on the rail device in the locking position.

In an advantageous embodiment, the stepladder is designed as a step ladder. It can be advantageously provided that the adjustment of the support device is designed such that the steps of step ladder according to the invention almost always with horizontal treads (both longitudinal and transverse) can be placed on stairs, regardless of which gradients, which riser height or which Step entrance width has the stairs.

In a particular embodiment is provided, it is provided that the length of the third support leg is increased. For example, this extendable and / or fold-out Stützfußverlängerungen be provided.

Fig. 1

erfindungsgemäße Stufenstehleiter zusammengeklappt in der Rückansicht,

Fig. 2

die erfindungsgemäße Stufenstehleiter während der Aufklappphase von der Seite, und

Fig. 3

eine Detailansicht der Verstellvorrichtung der Stützvorrichtung.

• Fig. 1 zeigt eine erfindungsgemäße Stehleiter 1 zusammengeklappt in der Rückansicht, die als Stufenstehleiter ausgebildet ist. Die Stehleiter 1 weist eine Holmvorrichtung 2 auf, an der Trittstufen 3 angeordnet sind. Die Holmvorrichtung 2 weist an ihrem unteren Ende einen ersten Stützfuß 4 und einen zweiten Stützfuß 5 auf. An der Holmvorrichtung 2 ist außerdem gelenkig eine Stützvorrichtung 6 mit parallel zu den Trittstufen angeordneten dritten Stützfuß 7 angeordnet. Die Länge des dritten Stützfußes 7 entspricht dem Längenabstand zwischen erstem Stützfuß 4 und zweitem Stützfuß 5. Die Länge der Stützvorrichtung 6 ist mit Hilfe eines teleskopartig ineinanderschiebbares Stützelementes 8 einstellbar. Das Stützelementes 8 und der dritte Stützfuß 7 sind t-förmig zueinander angeordnet. Das teleskopartig ineinanderschiebbare Stützelement 8 ist darüber hinaus in unterschiedlichen Längeneinstellungen wieder lösbar arretierbar. Hierzu weist das Stützelement 8 ein Außenrohr 9 und ein Innenrohr 10 auf, wobei an dem Außenrohr 9 ein federbelasteter Rastbolzen 11 vorgesehen ist, der in eine von mehreren Bohrungen 15 eines Innenrohres 10 eingreift; dies ist in Fig. 3 im Detail dargestellt. Die Stehleiter 1 weist eine Trittplattform 12 auf, die beim Aufklappen zwangsgeführt und automatisch in die Waagerechte gedreht wird.
• Fig. 2 zeigt die erfindungsgemäße Stehleiter 1 während der Aufklappphase von der Seite. Die Trittplattform 12 ist gelenkig an der Stützvorrichtung 6 angeordnet. Sie stützt sich in der Aufspreizstellung der Stehleiter 1 an der einer zwischen den Holmen der Holmvorrichtung angeordneten Querstrebe 16 ab. Es ist eine Plattformverriegelung 13 vorgesehen, die als an der Trittplattform 12 angeordnete Rastnasen 14 ausgeführt sind. Die Rastnasen 14 umgreifen die Querstrebe 16 in der Aufspreizstellung. Es ist gut zu erkennen, dass die Trittplattform 12 auf Grund der Geometrie bei Belastung in die Plattformverriegelung gedrückt wird, was ein ungewolltes Zusammenklappen der Stehleiter wirksam verhindert.

In the drawing, the subject invention is shown schematically and will be described below with reference to the figures, wherein like-acting elements are provided with the same reference numerals. Showing:

Fig. 1

Staged ladder according to the invention folded in the rear view,

Fig. 2

the step ladder according to the invention during the unfolding phase from the side, and

Fig. 3

a detailed view of the adjustment of the support device.

• Fig. 1 shows a stepladder 1 according to the invention folded up in the rear view, which is designed as a step ladder. The stepladder 1 has a spar device 2, are arranged on the treads 3. The Holmvorrichtung 2 has at its lower end a first support leg 4 and a second support leg 5. In addition, a support device 6 with a third support foot 7 arranged parallel to the treads is articulated on the spar device 2. The length of the third support leg 7 corresponds to the longitudinal distance between the first support leg 4 and second support leg 5. The length of the support device 6 is adjustable by means of a telescopically nestable support member 8. The support member 8 and the third support leg 7 are T-shaped to each other. The telescopically nestable support member 8 is also releasably lockable in different length settings. For this purpose, the support member 8 an outer tube 9 and an inner tube 10, wherein on the outer tube 9, a spring-loaded locking pin 11 is provided which engages in one of a plurality of holes 15 of an inner tube 10; this is in Fig. 3 shown in detail. The stepladder 1 has a tread platform 12, which is forcibly guided on opening and automatically rotated in the horizontal direction.
• Fig. 2 shows the stepladder 1 according to the invention during the unfolding phase from the side. The tread platform 12 is articulated to the support device 6. It is supported in the spread-open position of the stepladder 1 at the arranged between the spars of the spar device cross member 16 from. It is a platform lock 13 is provided, which are designed as arranged on the tread platform 12 locking lugs 14. The locking lugs 14 engage around the transverse strut 16 in the spread-open position. It is good to see that the tread platform 12 is pressed into the platform lock due to the geometry under load, which effectively prevents unintentional folding of the stepladder.

LIST OF REFERENCE NUMBERS

1

stepladder

2

Holm device

3

treads

4

first support foot

5

second support foot

6

support device

7

third support foot

8th

support element

9

outer tube

10

inner tube

11

Indexing plungers

12

stepping platform

13

platform lock

14

locking lugs

15

drilling

16

crossmember

Claims (15)

Stepladder with a spar device are arranged on the treads and arranged with a pivotally mounted on the spar device support device, the spar device at the lower end having a first and a second support leg, characterized in that the support device has a parallel to the tread arranged third support leg whose Length at least equal to the distance between the first and second support leg, wherein the length of the support device is adjustable. Stepladder according to claim 1, characterized in that the supporting device has a telescopically telescoping support member. Stepladder according to claim 1, characterized in that the supporting device has a single telescopically telescoping support member. Stepladder according to one of claims 2 or 3, characterized in that the telescopically telescoping support member and the third support leg are T-shaped to each other. Stepladder according to one of claims 2 to 4, characterized in that the telescopically nestable support member is releasably lockable in different length settings again. Stepladder according to one of claims 2 to 5, characterized in that on an outer tube of the telescopically nestable support element a - preferably spring-loaded - locking bolt is provided, which engages in one of a plurality of holes of an inner tube. Stepladder according to one of claims 2 to 5, characterized in that on an inner tube of the telescopically telescoping support element a - preferably spring-loaded - locking pin is provided which engages in one of a plurality of holes of an outer tube. Stepladder according to one of claims 1 to 7, characterized in that a tread platform is provided. Stepladder according to claim 8, characterized in that the tread platform is articulated to the support device. Stepladder according to one of claims 8 or 9, characterized in that the tread platform is supported in the Aufspreizstellung the stepladder on the spar device. Stepladder according to one of claims 8 to 10, characterized in that the tread platform is supported in the spread-open position of the stepladder on a transverse strut between Holmen the Holmvorrichtung. Stepladder according to one of claims 8 to 11, characterized in that a platform locking is provided. Stepladder according to one of claims 1 to 12, characterized in that the length of the third support leg is increased. Stepladder according to claim 13, characterized in that the length of the third support leg by means of extendable and / or fold-out Stützfußverlängerungen is increased. Stepladder according to one of claims 1 to 14, characterized in that the stepladder is designed as a step ladder.

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