EP2789787B1 - Ladder, in particular a step ladder with prevention against sinking - Google Patents

Description

• wobei die Holme über Sprossen oder Stufen miteinander verbunde sind,
• wobei an wenigstens einem ersten Ende jedes Holmes ein Leiterfuß angebracht ist,
• wobei die Leiter so aufstellbar ist, dass sie mit einer Aufstandsfläche der Leiterfüße auf dem Boden ruht,
• wobei die Leiter einen Einsinkschutz zum Verhindern eines Einsinkens der Leiter aufweist, insbesondere in weichem Boden im Garten,
• wobei die Leiter als Einsinkschutz eine Leiste (31) aufweist, die in einer möglichen ersten Montageposition die Aufstandsflächen der Leiterfüße (13) abdeckt und lösbar an den Holmen (11) befestigt ist,
• wobei die Leiste (31) einen ersten Schenkel und einen zweiten Schenkel aufweist und
• wobei in dieser möglichen ersten Montageposition der erste Schenkel an den ersten Seiten der Holme (11) anliegt und der zweite Schenkel die Aufstandsflächen der Leiterfüße (13) abdeckt.

The present invention relates to a ladder, in particular stepladder, with a pair of spars,

• the spars being connected by rungs or steps,
• wherein a ladder foot is attached to at least a first end of each spar,
• the ladder being erectable so as to rest on the ground with a footprint of the ladder feet,
• the ladder having a sink-in protection for preventing sinking of the ladder, especially in soft ground in the garden,
• the ladder being a safety guard having a bar (31) which, in a possible first mounting position, covers the contact surfaces of the ladder feet (13) and is detachably fastened to the bars (11),
• wherein the strip (31) has a first leg and a second leg and
• wherein in this possible first mounting position of the first leg on the first sides of the spars (11) is applied and the second leg covers the contact surfaces of the ladder feet (13).

Ladders, in particular stepped ladders, are known from the prior art in many variations.

Stepped ladders are often referred to as household ladders, from which a considerable number of persons using these ladders can be deduced. Many of these ladders are used in households, for example for attaching objects to ceilings or walls, for renovations, etc. But not only indoors are these ladders used. They are also used outdoors, especially in the garden, for example when cutting shrubs, trees or hedges or for fruit harvesting.

While in the interior usually a suitable footprint is always available on which a ladder can be placed safely, this is not always the case outdoors. There is always the danger that the ladder feet will sink because of the pressure on them during use of the ladder, especially in the case of overgrown, but even more so when the garden floor is not covered. In most cases, the ladder feet at the ends of the spars do not sink into the ground at the same time and / or to the same extent. The ladder can then quickly tilt. Ultimately, there is a risk that the user falls from the ladder or the ladder and the user fall over. Injuries or even worse can be the result.

To prevent such consequences, the users of the ladders frequently place boards or the like under the ladder feet to prevent the ladder from sinking. In addition, there are also ladders that are manufactured and offered by the manufacturers with a Eininkschutz to prevent sinking of the ladder, especially in soft ground in the garden. The principle of these ladders is to reduce the pressure of the ladder feet on the ground by increasing the size of the ladder feet and thus prevent subsidence.

From the DE 600 01 496 T2 Such a ladder is known with a sink-in protection. These ladders and many other ladders with a sink-in protection can only be used indoors with restrictions. Due to the large ladder feet can be a hindrance, especially in areas with only a small free floor surface for erecting the ladders. In addition, because of the large ladder feet, the ladders take up a large footprint that is needed when the ladder is not being used and parked.

The in the document DE 600 01 496 T2 Although known conductor has an extendable by pulling ladder foot, which is attached to the first ends of both spars. But even in the retracted state, this foot has a compared to a conventional step ladder for indoor considerable space requirements for setting up the ladder.

Against the background of the disadvantages of the prior art, there has been a need in the past to propose a ladder which is suitable both for indoor and outdoor, has a small footprint and yet is able to provide a user with a safe Stand the ladder to offer. A known ladder with the features mentioned has remedied this need.

The strip is attached to the uprights in addition to the feet in the first mounting position to provide a sink-in protection when used outdoors. If, on the other hand, the ladder is to be used indoors or parked, it is possible to remove the bar and place the ladder without a bar on the ladder feet.

The strip of a conductor according to the invention has a first leg and a second leg. In the first mounting position, the first leg rests against the first sides of the spars. The second leg can cover the contact surfaces of the ladder feet.

In the documents JP 2001/193374 A and JP 2007 191978 A Ladders are disclosed with the features mentioned in the preamble of claim 1. From the document FR 2 948 143 A1 a similar ladder is known which does not have all the features mentioned above.

At the out of the document JP 2001/193374 A Known ladder is the bar via brackets and screws releasably attached to the spars of the ladder. If the ladder is used indoors, the strip can be removed, the screws must be solved. Outside, the ladder can be used with the bar. The bar can only be fixed in one position on the ladder.

At the out of the document JP 2007 191978 A known ladder is the footprint of the ladder feet covering bar pivotally attached to the spars and can be pivoted so that the bar covers the ladder feet or are pivoted so that the ladder rests with the footprint of the ladder feet directly on the ground. Thus, the ladder can be used on the one hand in the outdoor area and on the other hand in the interior, depending on whether the bar is pivoted in front of the ladder feet or not. The bar can only be fixed in one position.

At the out of the document FR 2 948 143 A1 Known ladder, the bar does not cover the footprints of the ladder feet. The bar is rather attached above the footprints on the bars and the ladder feet extend beyond the bar or protrude through the bar. By arranging a sinking of the ladder feet in a soft ground is not prevented, but at best only limited. In addition, the bar can be mounted only in one position on the ladder.

None of the documents JP 2001/193374 A . JP 2007 191978 A and FR 2 948 143 A1 Known ladders, the bar in various positions releasably attached to spars displaced be. However, the ability to fix the strip in various positions on the spars can be an advantage if the ladder is to be placed next to an immovable object, such as a wall, on a soft ground. It is advantageous if the strip can be attached to the spars such that one end of the strip does not protrude laterally beyond the spar.

This problem is inventively solved in that the bar has two screws each with a head and that the first leg has a groove in which heads of two screws are slidably mounted, with which the bar is fixed in the first mounting position on the bars. The threads of the screws may be substantially perpendicular to the bar.

The spars may have holes in the region of the first ends through which the screws are passed in the first mounting position of the strip. In the first mounting position of the strip, nuts, in particular wing nuts or star nuts, can be screwed onto the ends of the screws protruding from the holes. The strip and the spars can be releasably connected to each other by means of the screws and the nuts.

The strip can preferably not only be fastened to the ladder in the first mounting position. Rather, it is possible to attach the bar in a second mounting position on the ladder. In this second mounting position, the bar, for example be accommodated when the ladder is turned off. Also for the transport of the ladder accommodation in the second mounting position is possible.

In the second mounting position, the strip can be detachably arranged between a bracket connecting the second ends of the rails or a storage tray connecting the second ends of the rails and an uppermost rung or step or a pivot axis of a platform of the ladder or a support strut for the platform.

The strip can be fastened in a form-fitting manner in the second mounting position. The bar may have at a first end and a second end connection structures that are suitable for the positive connection and set up.

The strip in the second mounting position can be fixed non-positively exclusively or in addition to another type of fastening. Thus, for example, the strip may be clamped between the bracket connecting the second ends of the spars or the tray connecting the second ends of the spars on the one hand and the topmost rung or step or a pivot axis of the platform of the ladder or support strut for the platform on the other.

The conductor according to the invention may be a laying ladder or a stepladder, in particular a step ladder. If the ladder is a stepladder or a ladder step ladder, it can have a riser part and a support part, which are connected to one another in an articulated manner. The riser can have the spars with the attached rungs or steps, at the first ends of the bar is fixed in the first mounting position. In addition, the support member may comprise further spars, which are interconnected by cross struts and have the first ends to which further ladder feet are attached. At the other ladder feet a further bar can be releasably attached as Eininkschutz in a first mounting position.

The further bar may be equal to the releasably mounted in the first mounting position on the riser bar. The two strips can be exchanged for each other. The further strip can, just like the strip detachably mounted in the first mounting position on the strip in the first mounting position on the other spars and / or in a second mounting position between the connecting the second ends of the spars strap or the second ends of the spars connecting Tray on the one hand and the top rung or step or the pivot axis of the platform or the support strut of the platform on the other hand be arranged detachably.

Fig. 1

eine Ansicht einer erfindungsgemäßen Leiter im zusammengeklappten Zustand und einer Leiste in einer zweiten Montageposition von vorne,

Fig. 2

eine Ansicht der Leiter gemäß der Fig. 1 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von oben,

Fig. 3

eine Ansicht der Leiter gemäß der Fig. 1 und 2 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von unten,

Fig. 4

eine Ansicht der Leiter gemäß der Fig. 1 bis 3 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von der Seite,

Fig. 5

eine Ansicht der Leiter gemäß der Fig. 1 bis 4 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von hinten,

Fig. 6

eine perspektivische Ansicht der Leiter gemäß der Fig. 1 bis 5 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von vorne,

Fig. 7

eine perspektivische Ansicht der Leiter gemäß der Fig. 1 bis 5 im zusammengeklappten Zustand und der Leiste in einer zweiten Montageposition von hinten,

Fig. 8

eine Ansicht einer erfindungsgemäßen Leiter im zusammengeklappten Zustand und einer Leiste in einer ersten Montageposition von vorne,

Fig. 9

eine Ansicht der Leiter gemäß der Fig. 1 bis 8 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von oben,

Fig. 10

eine Ansicht der Leiter gemäß der Fig.1 bis 9 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von unten,

Fig. 11

eine Ansicht der Leiter gemäß der Fig. 1 bis 10 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von der Seite,

Fig. 12

eine Ansicht der Leiter gemäß der Fig. 1 bis 11 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von hinten,

Fig. 13

eine perspektivische Ansicht der Leiter gemäß der Fig. 1 bis 12 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von vorne,

Fig. 14

eine perspektivische Ansicht der Leiter gemäß der Fig. 1 bis 13 im zusammengeklappten Zustand und der Leiste in einer ersten Montageposition von hinten,

Fig. 15

eine Seitenansicht der Leiter gemäß der Fig. 1 bis 14 im aufgestellten Zustand mit den Leisten in der ersten Montageposition und

Fig. 16

eine perspektivische Ansicht einer Leiter gemäß der Fig.1 bis 14 im aufgestellten Zustand mit den Leisten in der ersten Montageposition.

Further features of the invention will become apparent from the following description of an embodiment with reference to the accompanying drawings. Show in it

Fig. 1

a view of a ladder according to the invention in the folded state and a bar in a second mounting position from the front,

Fig. 2

a view of the ladder according to the Fig. 1 in the folded state and the bar in a second mounting position from above,

Fig. 3

a view of the ladder according to the Fig. 1 and 2 in the folded state and the bar in a second mounting position from below,

Fig. 4

a view of the ladder according to the Fig. 1 to 3 in the folded state and the bar in a second mounting position from the side,

Fig. 5

a view of the ladder according to the Fig. 1 to 4 in the folded state and the bar in a second mounting position from the rear,

Fig. 6

a perspective view of the ladder according to the Fig. 1 to 5 in the folded state and the bar in a second mounting position from the front,

Fig. 7

a perspective view of the ladder according to the Fig. 1 to 5 in the folded state and the bar in a second mounting position from the rear,

Fig. 8

a view of a ladder according to the invention in the folded state and a bar in a first mounting position from the front,

Fig. 9

a view of the ladder according to the Fig. 1 to 8 in the folded state and the bar in a first mounting position from above,

Fig. 10

a view of the ladder according to the Fig.1 to 9 in the folded state and the bar in a first mounting position from below,

Fig. 11

a view of the ladder according to the Fig. 1 to 10 in the folded state and the bar in a first mounting position from the side,

Fig. 12

a view of the ladder according to the Fig. 1 to 11 in the folded state and the bar in a first mounting position from behind,

Fig. 13

a perspective view of the ladder according to the Fig. 1 to 12 in the folded state and the bar in a first mounting position from the front,

Fig. 14

a perspective view of the ladder according to the Fig. 1 to 13 in the folded state and the bar in a first mounting position from behind,

Fig. 15

a side view of the ladder according to the Fig. 1 to 14 in the erected state with the strips in the first mounting position and

Fig. 16

a perspective view of a ladder according to the Fig.1 to 14 in the erected state with the strips in the first mounting position.

The ladder according to the invention, which is a step ladder, has a riser part 1 and a support part 2. The riser 1 and the support member 2 are connected to each other via a hinge.

The riser part has two spars 11, which are connected to each other via three stages 12, a pivot axis 15 and a tray 14. The distance from step 12 to step 12 or from an uppermost of the steps 12 to the pivot axis corresponds to a customary measure. At the lower end of the ladder uprights 11 ladder feet 13 are provided, with which the ladder can stand on a substrate. The upper ends of the spars 11 are connected to each other by means of a tray 14.

Also, the support member has two spars 21, which are connected to each other via cross braces 22, 25. A first of the two transverse struts 22, 25, namely the transverse strut 22, is provided in the region of a lower end of the support part 2. An upper transverse strut 25 of the two transverse struts 22, 25 is arranged approximately at the level of the pivot axis 15 of the riser part and is also referred to as a support strut 25. The lower ends of the spars 12 are also provided with ladder feet 23. At the upper ends of the spars covers 24 are provided which cover the joint between the spars 11 of the web portion 1 and the spars 21 of the support member.

On the pivot axis 15, a platform 16 is pivotally mounted. This platform 16 is connected via a bracket 26 in a known manner with the support strut 25. The bracket 26 provides when erecting the ladder for folding down the platform 16 on the support strut 25. When folding the ladder, the bracket 26 ensures a pivoting of the platform 16 between the struts 11th

The ladder corresponds in this respect a conventional ladder, as it has been produced by the applicant for quite some time.

The particular feature of the conductor according to the invention are the strips 31, which are arranged in the first mounting position at the lower ends of the spars 11 of the riser part 1 and at the lower ends, the spars 21 of the support part.

The strips 31 have a uniform profile. They have two legs which are at an angle to each other, which preferably corresponds to the angle which a rear side of the ladder feet 13 and a bottom of the ladder feet 23 have to each other. They each have a groove, which are provided in the inner width of the legs, which rest in the first mounting position on the inside of the spars 11, 21. In the grooves heads of screws 32 are slidably guided in the longitudinal direction of the strips 31. On each bar 31, two screws 32 are provided. The threads of the screws 32 are approximately at right angles from the bar 31.

The other legs cover in the first mounting position of the bar 31, the bottom of the ladder feet 13, 23 from.

At the lower ends of the spars 11, 21 holes are provided through the spars from front to rear. Through these holes 31, the screws 32 are passed in the serious mounting position of the bar. On the out of the holes outstanding ends of the screws 32 are screwed star nuts 33. The screws 32 and the star nuts 33 fastened the strips 31 on the spars 11, 21 releasably. The star nut 33 can be solved manually and without tools.

The strips 31 can be removed from the first mounting position by loosening the star nuts 33 and pulling the screws 32 out of the holes at the lower ends of the spars 11, 21. The strips 31 can then be brought into the second mounting position.

The fact that the screws 32 are slidably mounted in the grooves of the strips 31, it is possible to freely choose the distance between the screws 32. This makes it possible to provide the strips for conductors with different distances at the lower ends of the spars 11, 21. The distances between the lower ends of the spars 11, 21 generally depend on the height of rise of a ladder. So ladders with, a greater rise height usually have a greater distance of the lower ends of the spars than ladders with a smaller rise height. Due to the displaceability of the screws 32 on the strips, it is possible to use the strips 31 for ladders with different heights.

Among other things, for fastening in the second mounting position, the strips 31 at their ends caps 34, which have connecting structures with which the strips can be positively and non-positively fixed between the tray 14 and the support strut 25 in the second mounting position. The connecting structures comprise a throat, in which the pivot axis 15 can engage.

The strips 31 are preferably housed in a transport of the ladder or for placing the ladder in the second mounting position.

Claims (10)

1. Ladder, in particular a free-standing ladder, comprising a pair of rails (11),

   - wherein the rails (11) are connected to one another by rungs or steps (12),

   - wherein a ladder foot (13) is located on at least a first end of each rail (11),

   - wherein the ladder may be erected in such a way that it bears on the ground with a contact area of the ladder feet (13),

   - wherein the ladder comprises a protection against sinking to prevent the ladder from sinking, in particular, into soft ground in the garden,

   - wherein the ladder comprises a strut (31) as a protection against sinking which, in a possible first installation position, covers the contact areas of the ladder feet (13) and is detachably mounted on the rails (11),

   - wherein the strut (31) comprises a first leg and a second leg and

   - wherein in this possible first installation position the first leg lies against first sides of the rails (11) and the second leg covers the contact areas of the ladder feet (13),

   characterized in that
   two screws (32) each having a head are provided on the strut (31) and in that the first leg comprises a groove in which the heads of these two screws are movably located.
2. Ladder according to Claim 1, characterized in that the rails comprise holes in the region of the first ends, through which holes the screws pass in the possible first installation position of the strut.
3. Ladder according to Claim 2, characterized in that in the possible first installation position of the strut (31), nuts (33), in particular wing nuts or star-grip nuts, are screwed onto the ends of the screws (32) protruding from the holes, and that the strut (31) and the rails are detachably connected to one another by means of the screws (32) and the nuts (33).
4. Ladder according to one of the Claims 1 to 3, characterized in that in a possible second installation position, the strut (31) is detachably mounted between a bracket connecting second ends of the rails (11) or a utility tray (14) connecting the second ends of the rails (11) on the one hand, and a pivot axle of a platform (16) of the ladder or a support brace (25) for the platform (16) on the other hand.
5. Ladder according to Claim 4, characterized in that the strut (31) in the possible second installation position is mounted in a form-fitting manner.
6. Ladder according to Claim 4 or 5, characterized in that the strut (31) comprises, at a first end and a second end, connecting structures which are suited to and equipped for the form-fitting connection.
7. Ladder according to one of the Claims 4 to 5, characterized in that the strut (31) in the possible second installation position may be, if appropriate, additionally mounted in a force-fitting manner.
8. Ladder according to one of the Claims 1 to 7, characterized in that the ladder is a free-standing ladder and comprises an ascending part (1) and a supporting part (2) which are connected to one another by articulated joints, wherein the ascending part (1) comprises the rails (11) with the rungs or steps (12) attached thereto, with the strut (31) being mounted to the first ends of said rails in the first possible installation position, and the supporting part (2) comprises additional rails (21) which are connected to one another by cross braces (15) and which comprise first ends to which additional ladder feet (13) are attached and on which an additional strut (31) is detachably mounted in a possible first installation position as a protection against sinking.
9. Ladder according to Claim 8, characterized in that the additional strut (31) is identical to the strut (31) detachably mounted on the ascending part (1) in the possible first installation position.
10. Ladder according to Claim 8 or 9 and 4, characterized in that the additional strut (31) is detachably mounted in the possible first installation position on the additional rails (21) and/or in a possible second installation position and or between the bracket connecting the second ends of the rails (11) or the utility tray (14) connecting the second ends of the rails (11) on the one hand, and the topmost rung or step or the pivot axle of the platform or the support brace (25) of the platform on the other hand, in the exact same manner as the strut (31) which is detachably mounted in the possible first installation position on the ascending part (1).

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