EP0173227A2 - Anchor element for the fastening of step irons in wall surfaces - Google Patents

Abstract

1. Step iron anchor element which can be fastened in wall surfaces (34) and has an internal reinforcement (5) of metal, with at least one insert end (5a) and an anchor sleeve (7) of plastic which sits firmly on the insert end, said anchor sleeve having a frontal terminating cone (8), a central anchoring portion (10) which is a continuation of the terminating cone and is provided with transverse ribs (9), an elastic sealing collar (11) being arranged to be freely displaceable on the end of said anchor sleeve that is opposite the terminating cone (8), characterised in that a) the end of the anchor sleeve (7) is provided with a series of adjacent, continuously encircling annular ribs (13, 18) and annular grooves which form retention members, and b) the sealing collar (11) is a flexible elastomer collar which fits snugly on the annular ribs (13, 18) and on its inside face likewise has a series of annular ribs (15) which cooperate elastically with the annular ribs (13, 18) of the anchor sleeve (7) to form a sealing system of teeth.

Description

The invention relates to an anchoring element which can be fastened in wall surfaces for a climbing device with an internal reinforcement made of metal with at least one installation end and with an anchoring sleeve made of plastic which is firmly seated at the installation end and which has a front end cone, a middle one adjoining the end cone and with Cross ribs provided anchoring part and a rear sealing collar.

Stirrups with anchoring elements of this type are known, for example, from French patents 2,071,601 and 2,440,461. To manufacture them, the plastic protective cover is drawn onto a straight reinforcement bar or a reinforcement tube and then cold-formed together to form the stirrup. The anchoring sleeves with a press fit are then pushed onto the free ends of the reinforcing bar in such a way that the free protective covering is sealingly covered by the free end of the anchoring sleeve.

This manufacturing method known from French patent specification 1 265 598 has the disadvantage that the protective cover at the bending points of the stirrup is squeezed too much and bursts, or that the reinforcement tube at the bending points kinks or tears without this manufacturing defect immediately due to the protective cover lying over it becomes visible. In addition, due to the high risk of buckling or tearing, the step of the stirrup may only be bent moderately, which in turn does not rule out the risk of slipping sideways when walking on the stirrup. At the point of overlap of a protective cover end with the corresponding anchoring sleeve, a tight seal is not always guaranteed, especially not because of there occurring bending elasticity, so that corrosive media reach the internal reinforcement at this point and can cause the same invisible corrosion from the outside.

The wall surfaces can consist of masonry, concrete, wood or comparable materials. The anchoring element fastened by driving into boreholes in the wall surfaces or by inserting it into the concrete mass to be poured should also lie tightly against the wall surface with the sealing collar of the anchoring sleeve in order to prevent the penetration of corrosive or decomposing media into the hole wall surrounding the anchoring sleeve.

In order to ensure effective sealing, it was proposed to adapt the side of the sealing collar facing the masonry to the mostly cylindrical, curved shape of the masonry (shaft or tower wall). Here, however, the curvature of the masonry is due to its radius of curvature, so that for differently arched masonry, different sealing collars, each adapted to the curvature, would have to be used, which in turn serves for a varied and complicated storage of the stirrups.

The present invention has for its object to provide an anchoring element of the type described above, which ensures a secure seal even with different shapes or radii of the wall surfaces.

This object is achieved in that the anchoring sleeve has retaining members behind the anchoring part, and that the sealing collar is designed as a soft elastic, freely adjustable and tight-fitting elastomer sleeve on the retaining members.

Due to the adjustability of the elastomer cuff in the area of the retaining members, the elastomer cuff can be adapted or deformed around the anchoring sleeve, be it on a flat or curved wall surface, and thereby an effective and permanent seal can be achieved. The elastomer sleeve also represents a stop for a prefabricated manhole shape.

Advantageously, the retaining members for the elastomer sleeve are formed by a large number of closely spaced, continuously circumferential circular ring ribs and grooves, while the inside of the elastomer sleeve has a number of annular grooves and ribs, which cooperate with the retaining members in a double manner to form a sealing toothing . The circular ribs and grooves of the retaining members define a large number of parallel planes which are all perpendicular to the axis of the anchoring sleeve, while those through the individual inner ribs and grooves certain planes of the elastomer machine, depending on the position of the elastomer sleeve, can also run obliquely to the axis of the anchoring sleeve (FIG. 7).

The retaining elements have the function of sealing ribs in particular: opposite the wall surfaces if they are partly in the fastening hole for the anchoring sleeve, and opposite the elastomer sleeve if they are at least partially enclosed by the latter. For the purpose of better sealing against the mounting hole, the retaining members have an outer diameter that is slightly, e.g. by 1 to 2 mm, larger than that of the immediately adjacent transverse rib or transverse rib segments of the anchoring part, the triangular profile of the retaining members in radial section corresponding to that of the transverse ribs on the anchoring part.

It is also advantageous if the retaining members consist of two groups of circular lips with different fineness and if the outer diameter of both groups is the same. The first group, which can consist, for example, of three to five circular, continuous circular ribs, has a coarser pitch in the axial direction of, for example, 3 to 5 mm with a depth of the grooves in between of 1.5 and 3 mm. The first group is preferably also used for sealing against the wall surface or the fastening hole. The second group, for example, from a variety Geometrically similar circular ring lips can have a finer pitch in the axial direction, so that 20 to 40, preferably about 30 circular ring lips fall to an axial length of 30 mm, the depth of the grooves lying between being about 0.20 to 0.80 mm can. This second group is preferably used for adjustment and sealing against the elastomer sleeve.

• Es wird möglich, die Innenbewehrung noch vor dem Aufbringen des Kunststoff-Schutzmantels, z.B. mittels -eines Spritzgußverfahrens, zu verformen, gegebenenfalls auch derart, daß die Verbindungsarme zwischen dem abgekröpften Trittstück und den Befestigungsschenkeln sowohl auf die Trittstückachse als auch auf die Schenkelachsen im wesentlichen, wie an sich bekannt, senkrecht ausgerichtet sind (siehe CH-PS 289 007). Etwaige Fehler an der kaltverformten Innenbewehrung können dabei sofort erkannt werden. Die Innenbewehrung kann auch in bestimmten Fällen aus Gußeisen bestehen. Dabei kann die gleichmäßige Wandstärke des Schutzmantels verhältnismäßig gering gehalten werden. Als Ummantelungskunststoff wird vorzugsweise Polyäthylen oder Polypropylen gewählt. Insbesondere ist es möglich, die Verankerungshülse einstückig und aus dem gleichen Kunststoff wie der Schutzmantel zusammen mit diesem durch Umspritzen aufzubringen.

When the anchoring element is structurally combined with other parts of an internal reinforcement to form a complete stirrup, there are further advantages:

• It is possible to deform the inner reinforcement before applying the plastic protective jacket, for example by means of an injection molding process, if necessary also in such a way that the connecting arms between the cranked tread piece and the fastening legs essentially on both the tread piece axis and the leg axes, as known per se, are oriented vertically (see CH-PS 289 007). Any errors in the cold-formed internal reinforcement can be recognized immediately. The inner reinforcement can also consist of cast iron in certain cases. The uniform wall thickness of the protective jacket can be kept relatively low. Polyethylene or polypropylene is preferably selected as the sheathing plastic. In particular, it is possible to make the anchoring sleeve in one piece and from the same Apply plastic like the protective sheath together with it by overmolding.

All-plastic stirrups are already known from US Pat. No. 4,100,997. However, these have to be bulky and solid due to their starting material and also cannot have a step piece that is bent downwards. In order to prevent the user from sliding sideways from the step piece, protruding stops are integrally formed on the end piece of the step piece, but this again entails the risk of getting caught on trouser legs and other items of clothing when the user descends. In the case of the known stirrups, protection of the masonry in the area of the hole edge is also not guaranteed.

It is particularly advantageous to form the transverse ribs of the anchoring part by a plurality of rib segments which follow one another in the circumferential direction at short intervals, as is known per se from DE-PS 22 54 550. The main advantage associated with this is that due to the subdivision of the transverse ribs into rib segments, a harder elastic starting material for the entire plastic protective jacket can be selected than would be the case with continuous transverse ribs on the anchoring part. In the present case, the rib segments are individually deformable and anchor themselves better in the wall hole without their Deformation would have an impact on neighboring segments. In an axial section through the leg axis, the rib segments show a triangular profile, the back of which is perpendicular and the base of which is or lies parallel to the axis of the leg or anchoring sleeve. The third side of the triangular profile is inclined from the outside inwards and from the back to the front to the axis of the leg.

A position of the connecting arms between the tread piece and the fastening legs perpendicular to the leg axes creates the prerequisite for a safe, error-free driving of the anchoring sleeves of the stirrup into the wall holes, which are known to be somewhat smaller in diameter. In order to define a striking plane or face on the stirrup that is exactly perpendicular to the leg axis, it is advantageous to form on the side of each connecting arm facing away from the anchoring sleeves a stop which is aligned parallel to the connecting arm and has a flat stop face which is perpendicular to the leg axis aligned with that of the stop associated with the other link arm.

Further advantageous embodiments of the subject matter of the invention emerge from the remaining subclaims.

Two exemplary embodiments of the subject matter of the invention are explained in more detail below with reference to FIGS. 1 to 7.

• Figur 1 zwei erfindungsgemäße Verankerungselemente an einem Steigbügel in perspektivischer Ansicht,
• Figur 2 eine Draufsicht auf eines der Einbau-Enden des Steigbügels nach Figur 1,
• Figur 3 einen Axialschnitt durch den Gegenstand von Figur 2 entlang der Linie III-III in Figur 2,
• Figuren 4,5 u. 6 perspektivische Ansichten einer einzelnen Verankerungshülse (Figur 4), einer Elastomermanschette (Figur 5) und einer Innenbewehrung, deren eines Ende als Rohrschelle für die Aufnahme eines Leiterholms ausgebildet ist (Figur 6), und
• Figur 7 einen Axialschnitt durch eine Verankerungshülse nach Figur 4 mit einer schräg aufgeschobenen Elastomermanschette nach Figur 5.

Show it:

• FIG. 1 shows two anchoring elements according to the invention on a stirrup in a perspective view,
• FIG. 2 shows a plan view of one of the installation ends of the stirrup according to FIG. 1,
• 3 shows an axial section through the object of FIG. 2 along the line III-III in FIG. 2,
• Figures 4,5 u. 6 perspective views of a single anchoring sleeve (FIG. 4), an elastomer sleeve (FIG. 5) and an internal reinforcement, one end of which is designed as a pipe clamp for receiving a ladder stile (FIG. 6), and
• 7 shows an axial section through an anchoring sleeve according to FIG. 4 with an obliquely pushed-on elastomer sleeve according to FIG. 5.

Seen from the outside, the U-shaped stirrup 1 according to FIG. 1 consists of two mutually parallel, horizontal fastening legs 2, 3 and a central, transversely oriented, horizontal tread piece 4 that is bent down relative to the fastening legs 2, 3.

The cross section of the stirrup 1 is essentially circular. The stirrup 1 has a tubular or full-rod-shaped, rigid inner reinforcement 5 made of metal or a metal alloy and a protective sheath 6 surrounding the inner reinforcement 5 made of plastic, as well as, in each leg end area, an anchoring sleeve firmly seated on the inner reinforcement 5 7. This anchoring sleeve 7, which is also made of plastic, has a front end cone 8, a central, possibly tapering slightly towards the front, adjoining the end cone 8, provided with transverse ribs 9, anchoring part 10 and a sealing collar 11 placed at the rear.

As can be seen from FIGS. 1 to 3, the protective sleeve 6 and the anchoring sleeve 7, with the exception of the sealing collar 11, are designed as a one-piece protective jacket 12 which surrounds the correspondingly pre-shaped inner reinforcement 5 and which, for has been applied by an injection molding process. On its periphery, the anchoring sleeve 7 behind the anchoring part 10 has a section provided with two groups of retaining members 13 and 18, on which the sealing collar 11 designed as a soft elastomer sleeve lies tightly and is freely adjustable and in the set position by the retaining members 13 and / or 18 is held.

The retaining members 13 of one group are formed by a plurality of closely spaced, alternating circular ring ribs and grooves, which run continuously around the circumference of the anchoring sleeve 7 and perpendicular to its axis. On the inside of the sealing collar 11, a number of annular ribs 15 are provided, which cooperate elastically with the retaining members 13 and / or 18 to form a sealing toothing.

The transverse ribs 9 of the anchoring part 7 are formed by a plurality of rib segments 16 which follow one another in the circumferential direction at short intervals, the individual rib segments lying on circles being arranged parallel to one another. In addition, the rib segments 16 of adjacent transverse ribs 9 are arranged at an angle to one another, so that a gap 17 between two adjacent segments 16 of the same transverse rib 9 is covered by a segment 16 of the adjacent transverse rib 9.

Between the retaining members 13 and the transverse ribs 9 of the anchoring part 10, the retaining members 18 are provided, which are likewise formed by a plurality of continuously rotating, annular ribs, the outer diameter of which is slightly larger than that of the immediately adjacent transverse rib 9. The retention members 18 of the other group cover an area that is about a quarter in length up to a third of the length of the area occupied by the transverse ribs 9. The retention members 13 directly adjoin the adjacent retention members 18. The outer diameter of the retaining members 13 is preferably the same size as that of the retaining members 18, so that - as already mentioned - the sealing collar 11 can also seat sealingly on the retaining members 18. At the front part, the sealing collar 11 has a wide sealing flange 19 with a flat front surface 20 (in a relaxed state).

The fastening limbs 2, 3 are connected to the transverse tread piece 4 via perpendicular, downwardly bent, vertical connecting arms 21, 22, which is also essentially perpendicular to the connecting arms 21, 22.

On the side facing away from the anchoring sleeves 7, a parallel stop 23, 24 is formed on each vertical connecting arm 21, 22, which has a flat stop surface 25 or 26 which is perpendicular to the axis of the leg and which corresponds to that (26 or 25) of the other connecting arm (22 or 21) associated stop (24 or 23) and serves as a protective cushion for hammer blows.

The stirrup described is torsion-resistant and corrosion-resistant in itself and also against the wall surfaces surrounding it. It can be hammered into wall surfaces made of concrete, masonry, wood or comparable material with the appropriate holes or inserted in prefabricated manhole forms using the wet process or installed on the construction site. Due to the previous shape of the inner reinforcement made of steel, chrome steel or aluminum (alloy) and the subsequent sheathing with e.g. molten polyethylene by means of high pressure, a homogeneous, tight-fitting elastic jacket is obtained which is neither brittle, so sensitive to impact, nor can it be infiltrated by corrosive media.

4 to 7, the same reference numerals are used for the same parts or elements.

The anchoring sleeve 7 according to FIG. 4 is in this case designed as an individual part and can be used both in connection with a stirrup 1 according to FIGS. 1 to 3 and in connection with a ladder bracket 30 according to FIG. 6. The anchoring sleeve 7 has a longitudinal bore 27 for pressing in or hammering in the installation end 5a of the internal reinforcement 5. Behind the retaining members 18 there is a cylinder surface 28, the diameter of which corresponds to that at which the retaining members 13 are located in FIG Outer diameter of the retention

organs 18 coincides, so that the sealing collar 11 can at least partially support or fix sealingly on the cylinder surface 28 (see FIG. 7). The cylinder surface 28 merges by means of a transition cone 29 into the end face of the anchoring sleeve 7, in which the opening of the longitudinal bore 27 is located.

FIG. 6 shows how the end of the inner reinforcement 5 facing away from the installation end 5a can be designed as a pipe clamp 31 for the clamping of a ladder stile 32, which is indicated by dashed lines. The pipe clamp 31 consists in a conventional manner of a half-shell 31a fixedly connected to the inner reinforcement 5 and a movable half-shell 31b which can be braced by means of a tension screw 33. A complete anchoring element is created by driving the inner reinforcement 5 into the anchoring sleeve 7. The sealing collar 11 (Figure 5) can then be opened from the front, i.e. slide on the end cone 8.

In FIG. 7, the cylindrical wall surface 34 of a shaft, which is perpendicular to the plane of the drawing, is indicated by a dashed circular line, to which the axis of the anchoring sleeve 7 runs eccentrically or on a chord. It can be seen in which elastic deformation compared to the initial shape shown in FIG. 5, the sealing collar 11 can be applied to this wall surface 34 in order to ensure a tight and optically clean closure.

Claims (10)

1. Fixable in wall surfaces anchoring element for a climbing device with an internal reinforcement made of metal with at least one installation end and with an anchoring sleeve made of plastic which is firmly seated at the installation end and which has a front end cone, a middle one which adjoins the end cone and is provided with transverse ribs Anchoring part and a rear sealing collar, characterized in that the anchoring sleeve (7) behind the anchoring part (10) has retaining members (13, 18), and that the sealing collar (11) as a flexible, on the retaining members (13, 18) freely adjustable and tight-fitting elastomer sleeve is formed. 2. Anchoring element according to claim 1, characterized in that the inner reinforcement (5) consists of two mutually parallel fastening legs (2, 3) each with an installation end and a central, with respect to the fastening legs bent down, transverse tread piece (4) and forms a stirrup, which is covered with a protective cover (6) made of plastic, that an anchoring sleeve (7) is arranged on each installation end, and that the protective cover (6) and the Anchoring sleeves (7) with the exception of the sealing collar (11) are designed as a one-piece protective jacket (12) and surround the preformed inner reinforcement (5). 3. Anchoring element according to claim 1, characterized in that the end of the inner reinforcement (5) facing away from the installation end is designed as a pipe clamp (31) for clamping a ladder stile ( ₃₂ ). 4. Anchoring element according to claim 1, characterized in that the retaining elements (13, 18) of the anchoring sleeve (7) are formed by a series of adjacent circular circumferential ribs and grooves, while the inside of the elastomer collar (11) is a series of circular grooves and ribs (15) which cooperate elastically with the retaining members (13, 18) to form a sealing toothing. 5. Anchoring element according to claim 1, characterized in that the transverse ribs (9) of the anchoring part (10) are formed by a plurality in the circumferential direction with spaced successive rib segments (16), wherein the rib segments of adjacent transverse ribs are arranged offset to one another in the circumferential direction. 6. Anchoring element according to one of claims 1 to 5, characterized in that the outer diameter of the retaining members (13, 18) is slightly larger than that of the adjacent transverse ribs (9) of the anchoring part (10), and that the retaining members (13, 18) have a triangular profile in axial section, which corresponds to the profile of the transverse ribs (9) of the anchoring part (10). 7. Anchoring element according to one of claims 1 to 6, characterized in that the retaining members (13, 18) consist of two groups of annular lips with different fineness and that the outer diameter of both groups is the same. 8. Anchoring element according to one of claims 1 and 2, as well as 4 to 7, characterized in that the cross-directional tread piece (4) bent downwards relative to the mutually parallel fastening legs (2, 3) into these legs via a connecting arm (21, 22) passes over, which is substantially vertical both on the legs and on the transverse step. 9. Anchoring element according to one of claims 1 to 8, characterized in that on the side facing away from the anchoring sleeves (7) on each connecting arm (21) is formed in each case a stop (23) aligned parallel to the latter, which has a flat, on the leg axis has a vertical stop surface (25) which is aligned with the stop surface (26) of the stop (24) assigned to the other connecting arm (22). 10. Anchoring element according to one of claims 1 to 9, characterized in that the anchoring sleeve (7) - seen from the anchoring part (10) - behind the retaining members (13, 18) has a cylindrical surface ( ₂₈ ) whose diameter with the outer diameter of the Retaining elements (13, 18) essentially coincide.

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