DE7240306U - WOODEN LATTICE GIRDER - Google Patents

Description

Artur Schwörer KG

7900 Ulm

Friedrich-Ebert-Str. 16

Stuttgart, 1ό. Gm 730 L / au

Wooden lattice girders

The ürfindung relates to a wooden lattice girder for Scallings in which at least a part of the edges delimiting the end face of the longitudinal spars is beveled.

In known wooden lattice girders of this type, the edges are the end face broken, so that this is only a short section of the longitudinal spars of the Support extending inclined phase adjoins the longitudinal surfaces of the support spars.

It is often unavoidable that end sections of the longitudinal spars of wooden lattice girders are unintentionally set in concrete. Then the known girders can only be pulled out of the concrete with great effort, which is associated with severe wear and tear and damage to the girder end, since grooves and gaps can be dug into the girder surface when the girder is pulled out, which would cause parts of the girder end section to splinter favor. In addition, the protective caps provided for known carriers and covering only on 01 / j.rniiaüuc uuu uugixuucrncxDc will be torn off.

The object of the invention is to avoid these disadvantages.

This object is achieved according to the invention in that the carrier end is tapered conically, with the taper extends over a length comparable to the thickness and width of the carrier.

This has the advantage that if a girder end is accidentally concreted in, it is easier to do so can be pulled out of the concrete.

The wear and tear and the risk of damage to the support beam when it is pulled out of the concrete is therefore high in the case of a conically tapered end section reduced"

♦ /.

This is especially the case when, according to a preferred embodiment of the invention, the outer surface the tapered part of the carrier is covered by a protective cap. One off Plastic existing protective cap can easily be produced so that unevenness of the outer surface be avoided, which are unavoidable in woodworking, so that in addition by choosing one Sufficiently strong plastic with a smooth surface, the possibility of catching the protective cap largely excluded from the outset with the concrete can be. If the protective cap consists, for example, of an elastic Kunststo.Ti *, and has a sufficient wall thickness that the deformation be absorbed by the plastic layer when the carrier end section is pulled out of the plastic can, wear is practically completely prevented. The protective cap can also consist of a die Concrete milk-repellent plastic.

If 'em according to a further embodiment of the invention 3 slots running at right angles to the star surface are provided in the end section of the beam, the protective cap can thus be held in these slots with fastening means, for example webs be that from the front of the Trkgerholmes in the slots are insertable

It canoe be sufficient if it is provided, the conical _Verjüngunc% only on two opposite sides of the support longitudinal members according to another embodiment of the invention. It is understood that in this case preferably the side surfaces of the support spars that come into contact with the concrete with the larger surface area have the tapered iron, i.e. in most cases the upper and lower longitudinal surfaces of the support spars.

In these cases there is also the penetration of concrete flooring between the protective cap and the end portion of the support beam.

If, according to a particularly preferred embodiment of the wooden lattice girder, the slots in parallel Planes or, in a further embodiment of the invention, the slots are perpendicular to the longitudinal plane of the carrier run, the protective cap can go in the direction of the "") para-planks. Slots, in the special case of the

Side surfaces of the support spar are pushed into the slots with their webs. This design of the end portion of the support spars it also allows. dem, the protective caps made of profile rails that each Have desired cross-section, cut to any desired length.

When loosening such a carrier, which is set in concrete with its conical protective cap, However, there is still a risk, albeit a small one, that it will be caused by the concrete getting caught in bumps the protective cap or by tilting the

I I I I (I

When pulling out also the concrete, the protective cap was torn off the end section of the girder beam and

damaged. A very secure attachment of the

Protective cap on the end section of the support beam is then I.

guaranteed if according to a particularly preferred;

Embodiment of the invention, the webs that are in the f

Slits are held, laterally protruding elevations ^

exhibit. These side elevations that make an out-r? J

slide the webs out of the slots in the beam ρ-

prevent can be designed very differently. '4

You can as transverse to the longitudinal axis of the carrier ^

Tilting with an angular or rounded cross-section ψ

be designed and with appropriately shaped grooves ^

of the support beam are in engagement or simply in the h

Be indented slotted walls. Other? |

Elevations, for example scale-like shaped, ■ ;;

rags pressed resiliently against the walls of the slits. '

be provided, which are oriented so that the webs f;

slightly into the slots from the front side

pushed, but can not be pulled out because \ the tabs of the side walls can now engage barb-like · dig into the side walls of the slots or projections.

As particularly tabil, embodiments of the invention have been found, the end portion of the \ carrier spars bei'denen as in the protective cap and embedded with
this is connected that the end faces of the end section of the spars and the side faces of the slots
directly on the carrier-side inner surfaces or _;

(111

The bars of the protective caps are in contact, i.e. none or only small ones Voids between the inner surface of the lobe and the outer surface the spars are present. A particularly favorable embodiment of this type can consist in dai; the Slits provided in the end face of the spars divide the end section of the carrier into a central and two lateral ones Divide parts and that the end faces of the. lateral parts opposite the face of the middle Are set back.

The end faces of the middle piece and the side parts can be perpendicular to the side faces of the in the middle part, so that the processing of a support spar is particularly easy, or it can be how. it is the case with further embodiments of the invention is, the end faces of the side parts at a greater angle than the conical taper of the support. end section against the side surfaces of the middle 3nd section be inclined, and there can also be the edges between the end face of the middle parts and the cheeks of the slots be beveled.

These embodiments, in which the end faces are at least partially inclined, have the additional advantage of that because of the special shape of the protective cap when the wearer is subjected to heavy impacts in the longitudinal direction the end faces of the side parts against the side faces of the middle part or the webs of the Schuczkappe are pressed and optionally also the middle part in the area of its front edges are also pressed together so that neither the side nor the middle part can be pushed apart or splinter, as it might be the case if a side cover of the band section of the carrier would not be present.

-lt.il

Further embodiments of the invention, which are characterized by a particularly low cost of material for the protective cap or the possibility of particularly efficient production of the support spar, consist in dats the slope of the beveled edges of the central part 'de.? Slope of the conical taper or slope, aer Corresponds to the end faces of the side parts.

Further details and embodiments of the invention, in any combination, individually or au several "can find application in the invention" emerge from the description of a preferred exemplary embodiment on the basis of the drawing.

The drawing shows a perspective view of the end section of the upper support beam of a Wooden lattice girder.

The illustrated in the drawing wooden lattice girder according to the invention has an upper beam, whose End section 1 is embedded in a protective cap 2 made of plastic. This is the snd section of the beam covering protective cap has conically tapering outer surfaces · 3 and 4, which the upper and Cover the underside of the end section of the support beam, as well as a vertically extending outer surface 5 on the forehead side of the carrier.

The end portion of the support beam 1 is formed by slots 6 running parallel to the upper and lower longitudinal surface of the support beam in a central part 7 and laterally

Divided into parts 8, the end faces 9 are inclined at a V angle of about 60 ° against the side surfaces of the natural part or the upper and lower length surfaces of the support spar and about half the length of the central part 7 against the End face 10 of the middle piece are set back. The edges 11 between egg end face 10 and the side faces 12 of the central part? are also beveled and lie in planes running parallel to the inclined end faces 9 of the lateral parts. The thin webs 13 formed on the inside of the protective cap 2, with which the protective cap is held in the slots 6 of the carrier spar, have ribs 14 facing one another at their inner ends, which are in engagement with grooves 15 of the carrier end section. The cap 2 encloses the end of the carrier without any significant cavities, so that the cap is supported substantially tightly on the end of the carrier and tensile and truck forces are well transmitted between this and the cap.

The cap can also be made of metal.

7243386-U.73

Claims (1)

Protection claims 1. Wooden lattice girders for formwork, in which at least a part of the end face of the longitudinal spars delimits Edges is beveled, characterized in that the support end (1) is conically tapered, whereby the taper (3 »4 ·) extends over a length comparable to the thickness and width of the beam ... 2. Wooden lattice girder according to claim 1, characterized in that that 4 the outer surface of the tapered part of the carrier covered by a protective cap (2) 3. Wooden lattice girder according to claim 2, characterized in that in the band section (1) of the carrier at right angles to the end face (10) extending slots (6) are provided. / Wooden lattice girder according to one of the preceding claims, characterized in that the conical tapering (3, 4-) is provided only on two opposite sides of the longitudinal height of the girder · γ 5. Wooden lattice girder according to claim 3 or 4, characterized in that that the slots (6) in parallel planes lie./ 6. Wooden lattice girder according to claim 5, characterized in that the slots (6) perpendicular to the longitudinal plane of the carrier get lost* , TMMM -IL y. Metal lattice girder according to an outer surface 3 to 6j, characterized in that the protective cap (?) has webs (13) which are held in slots (G), and that the webs (13) have laterally protruding elevations (15). , 8. Wooden lattice girder according to one of claims 3 to 7, characterized in that 3 the slots (6) provided in the end face (9, 10) of the spars, the änd section (1) ci.es girder ^ in a middle (7) and two side parts (8) subdivide and düii the end faces (9) of the side parts are set back with respect to the end face (10) of the central part (7). 9 · Kolz lattice girder according to claim 8, characterized in that that the edges (11) between the end face (10) of the central part (7) and the cheeks (12) of the Slits (6) beveled "TO. Holzgitter ^ räger according to claim 9» characterized in that that the inclination of the beveled edges (11) of the central part (7) cLer inclination of the conical Taper (3, 4) corresponds to / ' 11. Wooden lattice girder according to claim 9, characterized in that the inclination of the beveled edges (11) the middle part (7) of the inclination of the end faces (9) of the side parts (8) corresponds to. ^