EP3341554B1 - Ladder top securing system - Google Patents

Description

The invention relates to a ladder head safety device for securing a ladder with rungs and bars on a gutter.

From the DE 10 2013 101 943 A1 a safety element for attachment to a rung ladder is known. The securing element has a securing bracket which rests against a gutter, wall covering, window sill or the like when the stepladder is leaning against it. The securing bracket is arranged so that it can pivot relative to the rung ladder, with the securing element being fastened to a rung of the rung ladder.

However, the angle of attack of the ladder cannot be freely selected with this safety element. It is fixed before setting up by connecting the safety element with a rung. The predetermined position of the securing element on the ladder determines the ladder angle at which the securing element can be leaned against a gutter.

In order to maintain an angle of approx. 70 degrees between the ladder and a surface on which the ladder stands, which is prescribed for safety reasons, the first step is to lay the ladder at the prescribed angle. In a second step, it is then necessary for a user of the ladder to remember the rung that rests against the gutter. In a subsequent third step, the user is forced to turn the ladder and attach the safety element to the rung he has remembered.

This process, which must be carried out when attaching the security element, is time-consuming and error-prone.

In the prior art is the U.S. 7,134,525 B1 known, which discloses a ladder head fuse. The ladder head safety device can be attached to the edge of a gutter using a clip and is also intended for attachment to a ladder stile. The relative position between the ladder rail and the bracket is adjustable.

Next is in the prior art BE 1010158 A6 known which discloses a safety system for maintaining a position of a ladder. This safety system can be attached to a gutter between two clamp latches, while it can be attached to a ladder by clamping the safety system between two rungs.

the DE 10 2008 022 678 A1 discloses a ladder head safety device which is intended for attachment to two rungs of a ladder. A boom that can be displaced in the longitudinal direction of the ladder is proposed, which is provided at its upper end with a device for engaging in a roof gutter.

It is therefore the object of the invention to provide a safety device, in particular a ladder head safety device for securing a ladder to a gutter, in which the ladder head safety device can be arranged on the ladder in a simple manner after a ladder has been erected at a specific angle.

This object is achieved according to the invention by the features of the independent patent claim. Further advantageous developments are the subject matter of the dependent claims.

According to the invention, the ladder head safety device for securing a ladder to a gutter has the following features individually and/or in combination, with the invention, however, being defined by the subsequent patent claims.

The ladder head safety device is used to secure a ladder against falling or tipping over by ensuring that the ladder is held securely on a gutter.

The ladder head safety device is used to secure a ladder against falling or tipping over by ensuring that the ladder is held securely on a gutter.

A ladder head safety device is preferably an assembly that can be arranged on any ladder. In this case, the most suitable rung for holding the ladder can be selected for fastening the ladder head safety device. For this purpose, the ladder head safety device can preferably be fastened to different rungs. The ladder head safety device is preferably designed to be removable from the ladder. This allows the ladder head safety device to be dismantled after, for example, a work process on the roof. This also allows for multiple use of the ladder head safety device on one or different ladders, as well as easy maintenance of the ladder head safety device.

It is also possible to permanently connect the ladder head protection to the ladder. For example, it can be firmly connected to a single rung, in particular directly or indirectly via at least one element arranged between the ladder and the ladder head safety device.

A ladder fastening device of the ladder head safety device can be attached to precisely one rung or to a single rung of a ladder. In this way, the ladder head safety can be connected to a ladder quickly and easily.

The ladder head safety device has an insertion device for insertion into the water-carrying area of a gutter. The ladder head safety device can thus be held securely on a gutter, for example, with the aid of the insertion device. In the context of this patent application, "insert" means that the insertion device is inserted into the gutter from above. In the fastened state of the ladder head safety device, the insertion device can be adjusted relative to the ladder rung to which the ladder head safety device is fastened, preferably in the direction of the gutter and/or the rails of the ladder and/or in the direction of gravity. This changes the relative height of the insertion device in relation to the rung of the ladder to which the ladder head safety device is attached.

The ladder head safety device includes an actuating device that connects the ladder fastening device to the insertion device. The insertion device can thus support the ladder fastening device fastened to a rung on, for example, a roof gutter of a house via the adjusting device. Thus, a secure hold of a ladder is possible with the help of the ladder head safety device.

The adjusting device includes a displacement guide for a relative displacement of the insertion device with respect to the conductor attachment device. By means of the sliding guide it is possible, after the ladder to be secured has been positioned at a certain angle, in particular at an angle of approx. 70 degrees relative to the direction of gravity, to adjust the ladder head safety device to the distance between a ladder rung to which it is attached and a position in the part of the gutter intended for water flow, in particular the bottom of a gutter. The insertion device for securing the ladder is inserted into the gutter at this position. This prevents the ladder from slipping and tipping over.

In a first, non-locked state, the insertion device can preferably be displaced relative to the ladder fastening device by means of the adjusting device and preferably also rotated. In this way, the insertion device can be optimally positioned, in particular within a gutter.

In contrast to the first state, in which the insertion device can be displaced in relation to the ladder fastening device, the insertion device is locked in a second, locked state in relation to the ladder fastening device. In this state, the ladder can be prevented from tipping sideways and slipping when the insertion device is inserted into the gutter. Nevertheless, it is possible to lift the ladder and thus move it by lifting it up and moving it laterally in a gutter. The ladder can therefore be used with the ladder head safety device at different points in the gutter and thus at different points on the roof. By lifting, a system of the insertion device on the inner wall of the gutter is relieved or eliminated, so that the ladder with the ladder head safety device can be moved relative to the gutter. Preferably, the insertion device remains fixed to the ladder in the same relative position during work on one side of a roof.

In this description, the term “displaceable” is understood to mean a translational movement that can run in a straight line, but this does not necessarily have to be the case. The adjusting device can be displaced along a theoretical displacement axis, along which the translatory movement takes place. The distance or distance between the insertion device and a holding device with which the ladder head safety device can be fastened to a rung can be adjusted by the displacement.

The adjusting device is preferably arranged such that it can rotate about an axis of rotation. In this way it is possible to pivot the adjusting device in relation to the ladder fastening device.

Both the displacement along a displacement axis and the rotation about a rotation axis are preferably stepless. This has the advantage that any angle and length can be adjusted.

The axis of rotation is preferably aligned essentially parallel to a rung of a ladder when it is fastened to the ladder. The ladder attachment device can be designed in such a way that the axis of rotation is oriented similar to a rung of a ladder. “Substantially parallel” is understood to mean a deviation of the center line, in particular the ideally assumed center line, of the rung from the axis of rotation, the deviation from the axis of rotation being able to lie, for example, in a cylinder with a diameter of 5 cm. In other words, in the present specification, a rung and an axis of rotation are considered "substantially parallel" if the axis of rotation lies within an idealized cylinder oriented parallel to the rung and having a diameter of 5 cm.

The ladder head safety device can be designed in such a way that the displacement axis can be rotated about the axis of rotation. The displacement axis is preferably oriented perpendicular to the axis of rotation. The axis of rotation preferably forms a surface normal for a surface in which the displacement axis is arranged.

With the adjusting device, the insertion device can be inserted into the gutter and removed from it. The insertion device can perform a pivoting movement about a theoretical axis of rotation and/or a superimposed displacement movement along a theoretical displacement axis. Depending on the rotational position of the adjusting device, the displacement movement can take place in different directions along the displacement axis rotated with the adjusting device. The axis of rotation preferably runs through the adjusting device. The axis of rotation is preferably arranged outside of the gutter when the ladder head safety device is in the state in which it is fastened to the gutter. When the ladder head safety device is in the attached state to the gutter, the axis of displacement preferably extends into the gutter.

The ladder head safety device preferably has a locking device for releasably locking the adjusting device. The locking device can lock the ladder head safety device in the second state. Consequently, the directions of movement of the actuating device can be at least restricted and preferably completely prevented with the aid of the locking device.

In the second, locked state of the ladder head safety device, the ladder fastening device, the insertion device, the actuating device and the locking device are preferably firmly connected to one another.

The locking device can act on the axis of rotation and at the same time on the axis of displacement, so that both the rotation and the displacement can be locked with the same process. This leads to easy handling.

Alternatively, the locking device can be constructed in such a way that the displacement and the rotation can be locked individually. The rotation can then be locked before or after the translation is locked. In another variant, only one rotation or only one displacement can also be possible. These can then each be fixed by means of a locking device.

A relative movement of the insertion device relative to the ladder fastening device, in particular a relative movement of the actuating device relative to the ladder fastening device, can preferably be releasably arrested by the locking device by means of a frictional connection. In this way, the head-of-the-ladder safety device can restrict or prevent the movement of the insertion device or the actuating device relative to the ladder-fastening device with the aid of the locking device. The non-positive connection principle preferably enables a stepless adjustment of the adjustment device in the locked, second state. There are then generally no form-fitting catches or the like required. The adjusting device is preferably locked by clamping.

The displacement of the insertion device along the displacement axis can preferably be arrested by means of the arresting device. Consequently, it is no longer possible to move the insertion device along an axis, but it is beneficial to rotate it.

Furthermore, it is preferred that the rotation of the insertion device about the axis of rotation can be locked by means of the locking device. Thus, the rotation of the insertion device can be blocked, whereas its displacement is still possible.

The displacement guide of the adjusting device is preferably arranged between the locking device and the ladder fastening device. This is meant in relation to a flow of forces between the ladder and the gutter and can deviate in relation to the spatial arrangement.

The locking device is preferably arranged immovably on the ladder fastening device. A user of the ladder head safety device then always knows where the locking device is, which makes operation easier. However, it is conceivable that in the case of a locking device which has individual locking mechanisms for rotation and displacement, only one of the locking mechanisms is arranged immovably on the ladder fastening device.

Furthermore, it is preferred that the ladder head safety device comprises two locking devices for one adjusting device each. This can increase security against unintentional release of a locking device can be guaranteed. Alternatively, a single alternative locking device can also be provided for all movements and all actuating devices. This has the advantage of quick and easy operation.

Furthermore, it is favorable if the insertion device is designed to be elongated. Due to the elongated shape, it is possible to insert the insertion device into a narrow gutter over a larger section. With the help of the elongated insertion device, a wide support surface for the ladder head safety device can also be realized within or on the base of the gutter, which increases the mechanical stability.

The insertion device is preferably arranged on the actuating device. This configuration allows the insertion device to be displaced and/or rotated with the aid of the adjusting device.

The insertion device is preferably suitable for being placed in the part of a roof gutter provided for water drainage and preferably for being placed at its base or at its deepest point. As a result, the mechanical stability of the ladder head safety device can be ensured when arranged on a ladder and on a gutter.

In a preferred embodiment, the displacement guide of the adjusting device includes an elongated hole. As a result, a simple structural design of the displacement guide can be implemented.

The adjusting device is preferably formed from a flat material. The configuration from a flat material is simple, inexpensive and mechanically stable.

In a preferred embodiment, the locking device forms part of the displacement guide, with which the actuating device can be clamped. In a variant, the part of the locking device is inserted through a slot in the adjusting device. In another variant, the sliding guide at least partially surrounds the actuating device from the outside. With both variants, a simple and safe holding or locking or clamping of the actuating device in a definable position is possible.

Preferably, the adjusting device for adjusting the distance from the insertion device to the ladder fastening device is designed to be elongated. This makes it possible to adjust the ladder head safety device to the distance between a rung of a ladder and a gutter or the bottom of the gutter.

The ladder attachment device preferably comprises a holding element. With its help, the ladder fastening device or the ladder head safety device can be securely arranged on a rung. The holding element is preferably designed as an open U-profile. It can also be designed as a differently shaped profile suitable for at least partially encompassing a rung.

Preferably, the ladder attachment device includes a securing device. This preferably closes the open U-profile of the holding element. As a result, the ladder head safety device or the ladder fastening device is fastened to a rung of a ladder in such a way that the ladder fastening device completely encompasses the rung and cannot be inadvertently released from the rung.

It is also preferred that the ladder attachment device has a connecting element. This element enables the holding element to be connected to the actuating device and the locking device.

The connecting element preferably extends from the holding element in the direction in which a rung can be introduced into the opening of the profile of the holding element. In this way, the connecting element can be spaced apart from the rung, as a result of which operation of the ladder fastening device, in particular the locking device, is less cramped and thus made easier.

The connecting element can preferably be connected or is connected to a locking device and preferably to a cross brace. Two receptacles are preferably provided for these connections, which make it possible to attach the locking device and the cross brace to the connection element. Alternatively, the cross brace can also be formed in one piece with one or both receptacles.

The cross brace preferably has an eyelet for transporting the ladder head safety device. As a result, the ladder head safety device can be carried hanging around the shoulder to the intended fastening point on a rung, for example with a belt that is passed through the eyelet.

In a preferred embodiment, the ladder head safety device comprises two adjusting devices, two locking devices and an insertion device. The adjusting devices are preferably spaced apart from one another. An insertion device is arranged at each end of the actuating devices. The ladder head safety device preferably comprises two spaced-apart adjusting devices which hold a single insertion device at two points, as a result of which high mechanical stability is achieved.

The adjustment device preferably has a minimum adjustment range of at least 15 cm, preferably between 30 cm and 50 cm. With the help of this configuration, it is possible for the distance between the insertion device and the ladder fastening device to be adjustable within the scope of the minimum adjustment range.

Ideally, the minimum adjustment range corresponds to the distance between two rungs of a ladder. It can thus be ensured that a gutter or the bottom of a gutter, which is arranged between two rungs of a ladder, can be reached by the insertion device with the aid of the minimum adjustment range.

In other words, the distance between the rung of a ladder, which protrudes over the gutter when erected, and the bottom of a gutter can be adjusted with the minimum adjustment range. Thus, a safe erection of a ladder under z. B. an angle of 70 degrees to the ground possible.

The displacement guide of the adjusting device is preferably arranged on the connecting element. As a result, the displacement guide can be fastened to the first receptacle. This attachment is preferably effected by the locking device. In this variant, the locking device is preferably equipped with a screw thread. The screw thread preferably runs through the sliding guide.

The ladder fastening device can preferably be adjusted in such a way that the position of the insertion device can be shifted approximately in the direction of gravity when the ladder head safety device is fastened to a ladder. This facilitates operation because the insertion device can be inserted into the gutter in the direction of gravity.

The head-of-ladder safety device preferably includes a safety projection which, in the intended fastening state, protrudes in the direction of the side of the ladder on which it is to be leaned against a gutter, for example. When fastened, the safety projection is firmly connected to the ladder head safety device. The ladder head safety device is preferably fastened in such a way that the safety projection is located above the gutter when the ladder is leaning against it. So it is possible that in a case where the ladder is leaning against the gutter but slips when climbing the ladder, the safety projection gets caught on the gutter and prevents the ladder from falling completely. Since the weight of the person climbing up the ladder also presses the ladder against the gutter when climbing the ladder, a good hooking of the safety projection on the edge of the gutter is guaranteed. The safety projection can, for example, be a section of the ladder head safety device which is located between a locking device and a fastening device.

In one embodiment, when fastened, the ladder head safety device preferably extends from the rung to which it is fastened, with the connecting element in the direction of the roof gutter. At the end of the connecting element, the locking device is arranged from the ladder in the direction of the gutter. The locking device has in this embodiment, manually adjustable screws, by means of which a person Locking device can lock and release without tools. The manually adjustable screws are arranged on the side of the ladder when the ladder head safety device is in the fastened state. In this way, they are easy to reach for an operator. The adjusting device extends from the locking device in the direction of the gutter. The adjusting device can be rotated about the locking device and can be displaced along the locking device. Locking by means of the locking device prevents both rotation and displacement of the adjusting device. The insertion device is arranged at the end of the actuating device. When fastened to the gutter, the insertion device is arranged inside the gutter and is preferably in contact with its inner wall.

The ladder head safety device or the ladder fastening device, the insertion device, the adjusting device and/or the locking device preferably has aluminum or an aluminum alloy. The design made of aluminum, in particular flat aluminum material, is simple, inexpensive, mechanically stable and easy to transport.

In a further aspect of the invention, a method for securing a ladder is proposed. According to the method, the ladder is placed against a gutter at a predetermined angle. Then the ladder is climbed by one person. Then the insertion device of the ladder head protection is adjusted in such a way that the adjusting device is inserted in the area of the gutter provided for the water flow. The locking device is then locked so that the ladder is secured by means of the ladder head safety device.

The ladder head safety device can be attached to the ladder before it is placed on the gutter. The ladder can then be engaged with the ladder head safety device. The ladder head protection can also offer protection against slipping away if the ladder head protection is not yet arranged in the optimal position in the gutter. If the ladder slips away, it usually slides along the gutter, so that the ladder head safety device comes to rest in the gutter. This can prevent the ladder from slipping further. A person who climbs up can thus be protected from falling. The ladder is preferably erected with the ladder head safety device locked. The protective effect is then significantly increased since the insertion device can transfer forces from the gutter into the ladder, which supports the ladder. However, a part of the ladder fastening device which protrudes towards the gutter can also prevent further slippage when it comes to rest on the gutter.

Alternatively, the line can be secured to the ladder after a person has gotten close to the gutter by climbing the ladder. The ladder is leaning against the gutter and protrudes over the gutter. the Ladder head protection is fastened to the part that protrudes over the gutter, preferably to the first rung above the edge of the gutter on which the ladder rests.

Figur 1

eine Leiterkopfsicherung zum Sichern einer Leiter mit Sprossen und Holmen an einer Dachrinne in einer räumlichen Darstellung;

Figur 2

eine seitliche Ansicht auf die Leiterkopfsicherung aus Figur 1 mit einem vergrößerten Halteelement;

Figur 3

zwei Stelleinrichtungen und eine Einlegeeinrichtung in räumlicher Darstellung;

Figur 4

einen vergrößerten Teilbereich der Leiterkopfsicherung aus Figur 1;

Figur 5

eine Leiterbefestigungseinrichtung der Leiterkopfsicherung aus Figur 1; und

Figur 6

die Leiterkopfsicherung zusammen mit einer Leiter.

The invention is explained in more detail below using an exemplary embodiment in conjunction with the associated drawings. These show schematically:

figure 1

a ladder head safety device for securing a ladder with rungs and bars on a gutter in a three-dimensional representation;

figure 2

a side view of the ladder head fuse figure 1 with an enlarged holding element;

figure 3

two adjusting devices and an insertion device in a three-dimensional representation;

figure 4

an enlarged section of the ladder head fuse figure 1 ;

figure 5

a ladder fastening device of the ladder head safety device figure 1 ; and

figure 6

the ladder head safety together with a ladder.

In the following description, the same reference symbols are used for the same objects.

figure 1 shows an embodiment of a ladder head safety device 1 for securing a ladder with rungs and bars on a gutter in a three-dimensional representation.

In this case, the ladder head safety device 1 has two ladder fastening devices 2 , an insertion device 3 , two adjusting devices 4 and two locking devices 6 as well as a cross brace 13 which includes an eyelet 15 . The adjusting devices 4 and the ladder fastening devices 2 are spaced apart from one another, with the insertion device 3 being arranged at one end of the adjusting devices 4 . Each adjusting device 4 has a displacement guide 5 for a relative displacement of the insertion device 3 with respect to the ladder fastening device 2 .

In this case, in a first, non-locked state, the insertion device 3 can be displaced and rotated relative to the ladder fastening devices 2 by means of the actuating devices 4 . With the present ladder head safety device 1 it is possible to move the insertion device 3 along the sliding guides 5 . In this way, the distance between the Head attachment devices 2 or the cross brace 13 to the insertion device 3 are changed. As a result, after it has been attached to a ladder, the ladder head safety device 1 can be optimally adjusted, for example to the distance between a rung of a ladder and the base of a gutter in which the insertion device 3 is positioned.

On the other hand, in a second, locked state, the insertion device 3 is locked in relation to the ladder fastening devices 2 .

Below is the embodiment from the Figures 1 to 6 described in detail, wherein for the sake of simplicity one of the ladder attachments 2, one of the locking devices 6, one of the adjusting devices 4 and one of the displacement guides 5 is described.

With reference to figure 1 and figure 2 the ladder fastening device 2 has a holding element 9 , a connecting element 10 and a holding lock 14 .

The holding element 9 is designed similar to a U-profile, which can grip a rung of a ladder. In order to close the open U-profile or to secure the holding element 9 of the ladder fastening device 2 on the rung of a ladder, the holding device 14 is arranged on the open side of the U-profile.

The retaining lock 14 is designed as a simple linch pin or linch pin, which is passed through two holes at the open end of the U-profile. In this way, the ladder head safety device 1 or the ladder fastening device 2 can be quickly and easily attached to a rung and also removed again. Securing the linch pin ensures that it is in the correct position on the retaining element 9.

The connecting element 10, which extends in the opposite direction to the opening direction of the opening O of the U-profile of the holding element 9, has a first receptacle 11 for the locking device 6 and a second receptacle 12 for the cross brace 13.

Various designs are possible for the receptacle 11 for the locking device, for example it is possible for the receptacles to have a thread into which the locking device 6 engages. However, it is also possible for the receptacle 11 to be in the form of a through hole into which a screw which interacts with the locking device 6 can be inserted.

In the figures 1 and 3 the insertion device 3 and the actuating devices 4 are shown.

In this case, the insertion device 3 is designed to be elongated, similar to a rod. The insertion device 3 is arranged or fastened at one end of the actuating device 4 . the Insertion device 3 can be inserted in the area of a roof gutter intended for water conduction.

Referring to the figures 1 , 2 and 3 the adjusting device 4 is described below.

As already explained above, the adjusting device 4 comprises a displacement guide 5 for a relative displacement of the insertion device 3 with respect to the ladder fastening device 2.

In this case, the adjusting device 4 connects the ladder fastening device 2 to the insertion device 3 , the insertion device 3 and the displacement guide 5 being arranged on the actuating device 4 on the first receptacle 11 of the ladder fastening device 2 .

In the present example, the displacement guide 5 of the adjusting device 4 comprises an elongated hole 8. The adjusting device 4 is cut out of a flat profile and also has a minimum adjustment range or an elongated hole 8 of at least 15 cm. The insertion device 3 can thus be displaced along the slot 8 with the aid of the slot 8 .

In other words, the adjusting device 4 is arranged to be displaceable along a displacement axis V, which is formed by the elongated hole 8 . As in figure 1 and figure 4 As can be seen, the actuating device 4 is not only displaceable along the displacement axis V, but is also arranged so as to be rotatable about an axis of rotation A.

In the figures 1 and 4 shows how the slot 8 is arranged on the first receptacle 11 of the locking device 6 . In this way, rotation about the axis of rotation A is possible, with the ladder attachment devices 2 from figure 1 are arranged to one another in such a way that the axis of rotation A extends through the first receptacles 11 in each case.

When the ladder head safety device 1 is attached to a ladder, the axis of rotation A is aligned essentially parallel to a rung of the ladder. This situation is in figure 6 shown.

The adjusting device 4 is arranged on the ladder fastening device 2 so that it can be displaced along the displacement axis V, which is oriented perpendicular to the axis of rotation A.

In the following, with reference to the figures 1 and 4 the locking device 6 is described, which is used to releasably lock the adjusting device 4 and is connected to the ladder fastening device 2 .

One part of the displacement guide 5 of the adjusting device 4 is arranged between the locking device 6 and the ladder fastening device 2 or the connecting element 10 and the insertion device 3 . A second part is formed by a screw element of the locking device 6, with the two parts of the sliding guide 5 being guided against one another. In this way, the locking device 6 can releasably lock a relative movement of the insertion device 3 in relation to the ladder fastening device 2, in particular a relative movement of the actuating device 4 in relation to the ladder fastening device 2, by means of a frictional connection. This results in a non-positive connection when the locking device 6 moves closer to the connecting element 10 , as a result of which the adjusting device 4 is clamped between the locking device 6 and the connecting element 10 .

In other words, it is possible to lock or fix the displacement of the insertion device 3 along the displacement axis V and the rotation of the insertion device 3 along the axis of rotation A by means of the locking device 6 .

In an alternative embodiment of the locking device 6 (not shown), this includes a displacement guide, which is designed for clamping the actuating device 4 from the outside. In this case, the sliding guide at least partly or partially surrounds the actuating device 4 from the outside. Here, too, the adjusting device 4 for adjusting the distance from the insertion device 3 to the ladder fastening device 2 is designed to be elongated.

Consequently, the locking device 6 is also in the alternative embodiment able to lock the adjusting device 4 with the help of the sliding guide and thus to adjust the distance of the insertion device 3 to the ladder fastening device 2 or to the rung of a ladder on which the ladder head safety device 1 is arranged.

That in the Figures 1 to 5 illustrated embodiment of the ladder head fuse 1 is briefly summarized again below.

In a first, unlocked state, the insertion device 3 can be displaced and rotated relative to the ladder fastening device 2 by means of the adjusting device 4, with the insertion device 3 being locked relative to the ladder fastening device 2 in a second, locked state.

In other words, in the second, locked state, the displacement of the insertion device 3 along the displacement axis V and the rotation of the insertion device 3 about the axis of rotation A are locked.

While in the first, non-locked state, the adjusting device 3 is arranged detachably from the ladder attachment device 3, in the second, locked state of the ladder head safety device 1, the ladder fastening device 2, the insertion device 3, the actuating device 4 and the locking device 6 are firmly arranged on one another.

In figure 6 the ladder head fuse 1 is shown together with a ladder 20 and a gutter 21 in the second locked state.

The arrangement shown shows that the ladder head safety device 2 can be adjusted in such a way that the position of the insertion device 3 can be displaced approximately in the direction of gravity G when the ladder head safety device 1 is fastened to the ladder.

Claims (12)

1. Ladder-top securing system (1) by means of which a ladder with rungs and stiles is secured on a roof -gutter, having:

   - a ladder-fastening device (2),

   - an insertion device (3) for insertion into a roof-gutter region provided for water-channelling purposes,

   - a positioning device (4), which connects the ladder-fastening device (2) to the insertion device (3),

   - wherein the positioning device (4) comprises a displacement guide (5) for displacement of the insertion device (3) relative to the ladder-fastening device (2),

   characterized in that the ladder-fastening device (2) is connectable to one single rung, wherein, in a state in which it has been inserted into the roof gutter and locked in relation to the ladder-fastening device, the insertion device can be raised up in the roof-gutter and displaced transversely therein.
2. Ladder-top securing system according to Claim 1,

   - wherein, in a first, non-locked state, the insertion device (3) can be displaced in relation to the ladder-fastening device (2), and preferably also rotated, by means of the positioning device (4),

   - wherein, preferably in a second, locked state, the insertion device (3) is locked in relation to the ladder-fastening device (2).
3. Ladder-top securing system according to Claim 1 or 2,

   - wherein the positioning device (4) is arranged such that it can be displaced along a displacement axis (V) and is preferably arranged such that it can be rotated about an axis of rotation (A),

   - wherein preferably the positioning device (4), for the purpose of adjusting the distance between the insertion device (3) and the ladder-fastening device (2), is of elongate design, and/or

   - wherein, preferably in the fastened state on the ladder, the axis of rotation (A) is oriented at least more or less parallel to a rung of the ladder, and/or

   - wherein preferably the positioning device (4) is arranged on the ladder-fastening device (2) such that it can be displaced along the displacement axis (V), wherein the positioning device (4) is oriented preferably at least approximatly at right angles to the axis of rotation (A), and/or

   - wherein, preferably in the second, locked state, the movement of the insertion device (3) along the displacement axis (V) is locked, and preferably the rotation of the insertion device (3) about the axis of rotation (A) is locked.
4. Ladder-top securing system according to one of Claims 1 to 3,

   - wherein the ladder-top securing system (1) comprises a locking device (6) for locking the positioning device (4) in a releasable manner,

   - wherein preferably the locking device (6) is connected to the ladder-fastening device (2), and/or

   - wherein preferably the locking device (6), as seen in relation to a flow of forces which can be transmitted, during operation, from the roof gutter to the ladder via the ladder-top securing system (1), is arranged between the ladder-fastening device (2) and the insertion device (3), and/or

   - wherein preferably movement of the insertion device (3) relative to the ladder-fastening device (2) in particular movement of the positioning device (4) relative to the ladder-fastening device (2), can be released and locked by the locking device (6), by way of a frictional connection, and/or

   - wherein the movement of the insertion device (3) along the displacement axis (V), and preferably also the rotation of the insertion device (3) about the axis of rotation (A), can be locked preferably by means of the locking device (6), in particular in the same locking operation, and/or

   - wherein preferably part of the displacement guide (5) on the positioning device (4), as seen in relation to a flow of forces which can be transmitted, during operation, from the roof gutter to the ladder via the ladder-top securing system (1), is arranged between the locking device (6) and the ladder-fastening device (2).
5. Ladder-top securing system according to one of Claims 1 to 4,

   - wherein the insertion device (3) is of elongate design,

   - wherein preferably the insertion device (3) is arranged on the positioning device (4).
6. Ladder-top securing system according to either of Claims 4 and 5, wherein the locking device (6) comprises part of the displacement guide (5), by means of which the part of the displacement guide (5) is clampable on the positioning device (4).
7. Ladder-top securing system according to one of Claims 1 to 6,

   - wherein the displacement guide (5) of the positioning device (4) comprises a slot (8),

   - wherein preferably part of the locking device (6) engages in the slot (8), such that the slot (8) is guided on the locking device (6).
8. Ladder-top securing system according to one of Claims 1 to 7,

   - wherein the locking device (6) engages around the positioning device (4) from the outside at least to some extent, such that the positioning device (4) is guided in the locking device (6).
9. Ladder-top securing system according to one of Claims 1 to 7, wherein the ladder-fastening device (2) comprises:

   - a holding element (9), which preferably has a U profile for engaging around a rung of a ladder,

   - preferably a connecting element (10), which extends preferably in the direction opposite to the opening (0) of the U profile of the retaining element (9), and/or

   - preferably the connecting element (10) has a first mount (11) for a locking device (6) and preferably a second mount (12) for a transverse strut (13), and/or

   - preferably a retaining safeguard (14), which preferably closes the open U profile of the holding element (9).
10. Ladder-top securing system according to one of Claims 1 to 9,

    - having two positioning devices (4), two locking devices (6) and an insertion device (3),

    - wherein the positioning devices (4) are spaced apart from one another and the insertion device (3) is arranged at one end of each of the positioning devices (4).
11. Ladder-top securing system according to one of Claims 1 to 9,

    - wherein, in the second, locked state of the ladder-top securing system (1), the ladder-fastening device (2), the insertion device (3), the positioning device (4) and the locking device (6) are fixed to one another,

    - wherein preferably the positioning device (4) has a minimum adjustment range of at least 15 cm, and/or

    - wherein preferably the displacement guide (5) of the positioning device (4) is arranged on the first mount (11) of the connecting element (10), and/or

    - wherein preferably the ladder-fastening device (2) can be adjusted such that, in the state in which the ladder-top securing system is fastened on a ladder, the position of the insertion device (3) can be displaced approximately in the direction of gravitational force.
12. Method for securing a ladder using a ladder-top securing system (1) according to one of the preceding claims,

    - wherein the ladder is placed at a predetermined angle against a roof gutter, a person climbs up the ladder, and

    - then the insertion device (3) of the ladder-top securing system (1) is inserted, by virtue of the positioning device (4) being adjusted, into the region of the roof gutter which is provided for water-channelling purposes, and

    - then the locking device (6) is locked, such that the ladder is secured by means of the ladder-top securing system (1).

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