SI22638A

SI22638A - Facade screw-in anchor fitting

Info

Publication number: SI22638A
Application number: SI200700277A
Authority: SI
Inventors: Vinko Kosmatin
Original assignee: Kosmatin Vinko S.P.
Priority date: 2007-10-25
Filing date: 2007-10-25
Publication date: 2009-04-30

Abstract

The invention deals with a screw-in anchor fitting which is aimed at receiving the supporting screw for attaching objects to a facade, consisting of at least a thermo-insulating layer from relatively soft material as well as a relatively thin but far harder cover layer. The anchor fitting according to the invention can be applied to such a regularly constructed facade without any previous drilling of the hole for applying the anchor fitting while at the same time without causing any visible damage on the facade surface it may be removed from the facade and later reapplied to the same spot whenever necessary. For this purpose the nib (3) of the anchor fitting according to the invention is designed in such a way that its point looking away from the head of the anchor fitting resembles the shape of a pyramid whose dominant radial size (t) exceeds the size of the diameter (d) of at least approximately cylinder-shaped stem (1) of the anchor fitting where directly next to the head (2) there is a truncated conical section (11) which keeps extending towards the head (2) and whose dominant diameter (D) also exceeds diameter (d) of the at least approximately cylinder-shaped stem (1), while at the same time the spiral (5) at a distance from the head (2) is terminated with a slightly rounded radial edge (51) and slightly rounded corner area (52) between the aforementioned edge (51) and the circumference of this spiral (5)

Description

Izum se nanaša na fasadni vijačni vložek, ki je prirejen za privijanje v fasadno termoizolacijsko plast zgradbe in obenem predviden za prejem nosilnega vijaka, s pomočjo katerega je na fasado zgradbe možno pritrditi vsakokrat želen predmet.The invention relates to a facade screw insert adapted for screwing into a facade thermo-insulating layer of a building and at the same time intended for receiving a supporting screw by means of which the desired object can be attached to the facade of the building at any time.

Po mednarodni patentni klasifikaciji so izumi te vrste uvrščeni na področje strojnih elementov, konkretno k zidnim vložkom ali podobnim zidnim pritrjevalnim pripomočkom.According to the International Patent Classification, inventions of this type are classified in the field of mechanical elements, in particular wall inserts or similar wall fasteners.

Pri tem je izum osnovan na problemu, kako zidni vložek, ki obsega vsaj približno valjasto steblo, v katerem je na voljo vzdolžna luknja za prejem vsakokratnega nosilnega vijaka in ki je na zunanji površini opremljeno z vijačnico za sidranje vložka v razmeroma mehko termoizolacijsko plast fasade in obenem za sidranje vložka v omenjeni plasti, omenjeno steblo pa je na enem koncu zaključeno s sploščeno glavo, v katere osrednjem območju je okoli omenjene luknje za prejem nosilnega vijaka na voljo ustrezno gnezdo za privijanje samega vložka s pomočjo ustreznega orodja, še nadalje izpopolniti do te mere, da bo vložek v regularno izvedeno fasado namestljiv brez predhodnega vrtanja izvrtine za vstavljanje vložka in da bo razen tega vložek brez povzročanja vidnih poškodb na zunanji površini fasade iz slednje po izbiri tudi odstranljiv in zatem po izbiri na isto mesto kadarkoli ponovno namestljiv.The invention is based on the problem of how a wall insert comprising at least about a cylindrical stem, in which a longitudinal hole is available to receive the respective supporting screw, and which is provided on the outer surface with a helix for anchoring the insert into a relatively soft thermal insulation layer of the facade and at the same time for anchoring the insert in said layer, said stem being terminated at one end by a flattened head, in which central area around said hole for receiving the bolt is provided with a suitable socket for screwing in the insert itself by means of a suitable tool, further refine to this measures that the insert in a regularly executed facade will be adjustable without first drilling the insertion hole of the insert, and that the insert will also be removable without causing visible damage to the exterior surface of the facade of the latter, and subsequently optionally re-installed thereafter.

Iz EP 0270 913 Al je znan zidni vložek, ki sestoji iz približno valjastega stebla, v katerem je na voljo osrednja vzdolžna luknja za prejem nosilnega vijaka in ki na obodu obsega vijačnico. Slednja je namenjena predvsem za čvrsto sidranje vložka v predhodno pripravljeni izvrtini v betonskem zidu, v katero je vložek pred privijanjem vijaka v omenjeno vzdolžno luknjo zlahka vstavljiv in po izbiri iz slednje načeloma tudi odstranljiv. Tovrsten vložek je primeren za sidranje v razmeroma trdnih slojih, npr. v betonski ali opečnati steni, obenem pa popolnoma neprimeren za sidranje v plasti iz razmeroma mehkega termoizolacijskega gradiva, kakršno je npr. polistiren ali podobno.EP 0270 913 Al is known for a wall insert consisting of an approximately cylindrical stem in which a central longitudinal hole is provided for receiving a supporting screw and comprising a helix at the circumference. The latter is intended primarily for firm anchoring of the insert in a pre-prepared hole in the concrete wall, into which the insert is easily insertable and optionally removable in principle before the screw is screwed into said longitudinal hole. Such an insert is suitable for anchoring in relatively solid layers, e.g. in a concrete or brick wall, wholly unsuitable for anchoring in layers of relatively soft thermal insulation material, such as e.g. polystyrene or the like.

Prijavitelj sam proizvaja komercialno dostopen fasadni vložek, ki sestoji iz valjastega stebla, ki je na enem koncu zaključeno s sploščeno krožno glavo. V steblu je na voljo osrednje razporejena vzdolžna luknja za prejem nosilnega vijaka, ki ga je vanjo možno priviti v smeri od omenjene glave proti nasprotnemu, stožčasto zaključenemu koncu stebla. Na omenjeni glavi je v osrednjem območju ob ustju omenjene luknje za prejem vijaka na voljo ustrezno gnezdo, ki je prirejeno obliki vsakokratnega orodja, zlasti izvijača, s katerim je možno privijati vložek v fasado. Razen tega je omenjeno steblo na zunanji površini opremljeno z vijačnico, ki poteka od omenjenega stožčasto zaključenega konca vzdolž stebla v smeri proti omenjeni sploščeni glavi, vendar je z ostrim radialnim robom zaključena na odmiku od glave. Tovrsten vložek sicer omogoča dobro sidranje nosilnega vijaka tudi v razmeroma mehki toplotnoizolacijski plasti fasade in s tem pritrjevanje različnih predmetov, npr. svetilk, hišnih številk, nosilcev anten ali drugih napeljav, na samo zunanjo površino fasade. Ne glede na to so bile med uporabo tovrstnih vložkov ugotovljene določene pomanjkljivosti. Pri vgradnji vložka v fasado, pri kateri je razmeroma mehka toplotnoizolacijska plast prekrita s sicer po eni strani razmeroma tenko, po drugi strani pa znatno tršo zunanjo prekrivno fasadno plastjo, ki je običajno prevlečena še z enim ali več slojev barve ali drugega premaza, je potrebno pred vstavljanjem vložka najprej izdelati ustrezno izvrtino. V omenjeno izvrtino nato privijejo vložek in zatem v vložek še nosilni vijak. Priprava izvrtin je po eni strani povezana z dodatno porabo časa, po drugi strani pa tudi s potrebo po razpolaganju z ustreznim strojem, svedrom in znanjem, še zlasti, ker tovrstna dela neredko vršijo na višini ali v drugih neugodnih položajih in razmerah. Pogosto se tudi dogaja, da na fasadi že pritrjen predmet bodisi odstranijo ali ga zgolj premaknejo na drugo mesto. Po odstranitvi predmeta, t.j. po odvitju nosilnega vijaka, je na fasadi vidna glava vložka. Ko odstranijo vložek in torej tudi glavo, je na fasadi vidna zgolj še izvrtina, ki je bila za izvrtana za potrebe privitja vložka. Ta izvrtina bi bila sicer lahko praktično neopazna, čemur pa v praksi ni tako. Ob privijanju vložka v omenjeno izvrtino namreč oster radialni rob, ki je na obodu vijačnice vložka zaključen pravokotno, neizogibno zareže v površino prekrivne plasti fasade in s slednje odstruži barvo in/ali druge sloje premazov, kar je potem v času prisotnosti vložka sicer očem skrito pod glavo vložka, po odstranitvi vložka pa postane zelo dobro vidno. Temu ustrezno pri uporabi obstoječih vložkov zatorej odstranitev vložka iz fasade ni priporočljiva oz. je v primeru odstranitve treba računati z vsaj manjšimi popravili na fasadi.The applicant itself produces a commercially available facade insert consisting of a cylindrical stem, which is completed at one end with a flattened circular head. In the stem there is a centrally arranged longitudinal hole for receiving a support screw which can be screwed in there from the said head towards the opposite, tapered end of the stem. On the said head, in the central area at the mouth of said hole for receiving the screw, there is a suitable socket adapted to the shape of the tool in question, in particular a screwdriver, which can be used to screw the insert into the facade. Moreover, said stem on the outer surface is provided with a helix extending from said tapered end along the stem towards said flattened head, but terminated with a sharp radial edge at a distance from the head. This type of insert allows the anchor bolt to be well anchored even in the relatively soft thermal insulation layer of the facade, thus securing various objects, e.g. lamps, house numbers, antenna mounts or other fixtures to the outside surface of the facade only. Nevertheless, certain shortcomings were identified during the use of such inserts. When installing a facade insert in which the relatively soft thermal insulation layer is covered with relatively thin film on the one hand, and on the other hand, a significantly stiffer outer coating facade layer, usually coated with one or more layers of paint or other coating, is required Before inserting the cartridge, first make a suitable bore. The insert is then screwed into the hole, and then a support screw is inserted into the hole. Borehole preparation, on the one hand, is associated with additional time consuming, and on the other hand, with the need to have the appropriate machine, drill and knowledge, especially since such work is often performed at altitude or in other unfavorable situations and conditions. It is also often the case that an object already attached to the facade is either removed or simply moved to another location. After removing the object, i.e. after unscrewing the support screw, the head of the insert is visible on the facade. When they remove the insert and therefore also the head, only a hole is visible on the facade, which has been drilled for the purpose of tightening the insert. This bore may be practically imperceptible, which is not the case in practice. When the insert is screwed into the said hole, a sharp radial edge, which is closed at the periphery of the insert of the insert, inevitably cuts into the surface of the overlay layer of the facade and removes the paint and / or other layers of the coating from the latter, which is then hidden under the eye during the presence of the insert. the head of the cartridge, and after removal of the cartridge it becomes very clearly visible. Therefore, removing existing inserts from the façade is not recommended or used when using existing inserts. in the case of removal, at least minor repairs to the façade must be accounted for.

Izum se nanaša na fasadni vijačni vložek, ki sestoji iz vsaj približno cilindričnega stebla, ki je opremljen z osrednje razporejeno in v vzdolžni smeri omenjenega stebla potekajočo slepo luknjo, ki je prirejena za prejem vsakokratnega nosilnega vijaka. Omenjeno steblo na enem koncu obsega glavo, na preostalem koncu pa konico. Omenjena luknja na od konice vstran obrnjeni čelni ploskvi glave s svojim navzven odprtim ustjem formira gnezdo za prejem vsakokrat ustreznega orodja za zagotavljanje za privijanje vložka v fasado potrebnega navora. Na omenjenem steblu je nadalje na voljo v profilu izrazito sploščena vijačnica, katere zunanji premer znatno presega premer samega stebla in ki poteka v smeri od konice proti glavi, zaključena pa je na odmiku od omenjene glave.The invention relates to a façade screw insert consisting of at least approximately a cylindrical stem, which is provided with a centrally arranged and longitudinally extending blind hole adapted to receive the respective supporting screw. Said stem comprises a head at one end and a tip at the other end. Said hole on the tip of the head facing side of the head, with its mouth open outwards, forms a nest for receiving each suitable tool to secure the insert to the facade of the required torque. On the said stem there is further provided in the profile a highly flattened helix, the outer diameter of which substantially exceeds the diameter of the stem itself, and extending in a direction from the tip to the head, and terminated at a distance from said head.

Po izumu je omenjena konica zasnovana kot s svojim vrhom v smeri vstran od glave obrnjena piramida, še zlasti štiristrana piramida, katere dominantna radialna dimenzija je večja od premera vsaj približno valjastega območja stebla, na katerem je v območju neposredno ob glavi predviden prisekan konusen odsek, ki je razširjen v smeri proti glavi in katerega dominanten premer je prav tako večji od premera vsaj približno valjastega območja stebla. Obenem je vijačnica na odmiku od glave zaključena z blago zaokroženim radialnim robom in blago zaokroženim vogalnim območjem med omenjenim robom in obodom te vijačnice. Konica je neposredno ob stopničastem prehodu v vsaj približno valjasto območje stebla prednostno opremljena s posnetjem. Vijačnica je na vsaj v bistvu valjastem odseku stebla formirana začenši od stopničastega prehoda v konico v smeri proti glavi in zaključena na aksialnem odmiku od glave, pri čemer .omenjena vijačnica vzdolž svoje celotne dolžine formira 2,5 do 3,5 polnih ovojev, še zlasti prednostno pa vsaj približno 3 polne ovoje. Nadalje je proti konici obrnjena površina glave konusno zasnovana in v osrednjem območju izbočena v smeri proti konici.According to the invention, said tip is designed as a pyramid facing away from its head, in particular a four-sided pyramid whose dominant radial dimension is larger than the diameter of at least about the cylindrical area of the stem, in which a truncated conical section is provided in the area immediately adjacent to the head. which is extended in the direction of the head and whose dominant diameter is also larger than the diameter of at least about the cylindrical area of the stem. At the same time, the helix at the distance from the head is completed with a slightly rounded radial edge and a slightly rounded corner area between said edge and the circumference of that helix. The tip is preferably provided with a snapshot, directly at the stepped passage into at least about the cylindrical area of the stem. The helix is formed on at least substantially cylindrical section of the stem, starting from a stepped passage in the tip towards the head and ending at an axial distance from the head, wherein said helix forms 2.5 to 3.5 full sheaths along its entire length, in particular preferably at least about 3 full wrappers. Further, the head-facing surface is conically shaped and convex in the central region towards the tip.

Primer izvedbe izuma je v nadaljevanju podrobneje obrazložen v povezavi s priloženo skico, kjer kažeAn example of an embodiment of the invention is explained in further detail below with reference to the accompanying drawing, where it is shown

Sl. 1 fasadni vijačni vložek v narisu;FIG. 1 facade screw insert in the outline;

Sl. 2 vložek v pogledu od strani, namreč v smeri proti konici;FIG. 2 a cartridge in a side view, namely towards the tip;

Sl. 3 pa vložek v prečnem prerezu v ravnini III - III po Sl. 1.FIG. 3 is a cross-sectional view in the plane III - III according to FIG. 1.

Vložek po izumu sestoji iz vsaj približno cilindričnega stebla 1, ki je na enem koncu zaključeno z glavo 2, na nasprotnem koncu pa s konico 3. V omenjenem steblu 1 je predvidena osrednje razporejena in v vzdolžni smeri stebla 1 potekajoča luknja 4, ki je v območju glave 2 navzven odprta, na nasprotnem koncu stebla pa zaključena na odmiku od omenjene konice 3. Omenjena luknja 4 je prirejena za prejem nosilnega vijaka, ki na skici ni posebej prikazan, in sicer na tak način, daje vijak po vgradnji vložka v fasado možno priviti v omenjeno luknjo 4. Ker je omenjena luknja 4 v tem primeru križno zasnovana, je kot taka primerna za sodelovanje s križnim izvijačem, zato omenjeno ustje 40 luknje 4 na čelni ploskvi 20 območju glave 2 obenem služi kot gnezdo za prejem orodja za zagotavljanje navora, kije potreben za vgradnjo vložka.The insert according to the invention consists of at least approximately a cylindrical stem 1 which is terminated at one end by a head 2 and at the opposite end by a tip 3. In said stem 1 there is provided a centrally arranged hole extending in the longitudinal direction 1 of the stem 4 which is in The head hole 2 is open to the outside and ends at the opposite end of the stem at a distance from said tip 3. Said hole 4 is adapted to receive a support screw which is not shown in the drawing in such a way that after the insertion of the insert in the facade it is possible screwed into said hole 4. Since said hole 4 is cross-shaped in this case, it is suitable for use with a cross-screwdriver, and therefore said hole 40 of hole 4 in the face 20 of the head 2 area also serves as a socket for receiving a torque tool. needed to install the cartridge.

Nadalje je na zunanji površini 10 stebla 1 predvidena vijačnica 5, ki v prikazanem primeru po dolžini stebla 1 optimalno tvori tri polne ovoje. Omenjena vijačnica 5 je formirana kot v profilu izrazito sploščena pravokotna vijačnica (Sl. 3), ki je nadalje tako zasnovana, da se od stopničastega prehoda 31 iz konice 3 v približno cilindrično območje zunanje površine 10 stebla 1 radialna dimenzija vijačnice 5 sprva postopoma in zvezno povečuje, nakar je vzdolž pretežnega dela dolžine stebla 1 nespremenljiva. Gledano v smeri od konice 3 proti glavi 2 je vijačnica 5 zaključena na odmiku od glave 2, in sicer na tak način, da sta končni radialni rob 51 (Sl. 1) in zunanje vogalno območje 52 (Sl. 3) vijačnice 5 blago zaokrožena.Further, a helix 5 is provided on the outer surface 10 of the stem 1, which optionally forms three full sheaths along the length of the stem 1. Said helix 5 is formed as in profile a highly flattened rectangular helix (Fig. 3), further designed so that from the step passage 31 from the tip 3 to the approximately cylindrical area of the outer surface 10 of the stem 1, the radial dimension of the helix 5 is initially gradually and continuously increases, then, along most of the length of the stem 1 is unchanged. When viewed from the tip 3 towards the head 2, the helix 5 is terminated at a distance from the head 2 in such a way that the end radial edge 51 (Fig. 1) and the outer corner area 52 (Fig. 3) of the helix 5 are slightly rounded. .

Konica 3 vložka je zasnovana kot pokončna - v prikazanem primeru štiristrana piramida, katere dominantna dimenzija t v radialni smeri je večja od premera d vsaj približno cilindričnega območja 10 stebla 1. Temu ustrezno je med omenjeno konico 3 in omenjeno površino 10 stebla 1 na voljo stopničast prehod 31, v bližini katerega je konica 3 prednostno opremljena s posnetjem 32.The tip 3 of the insert is designed to be upright - in the example shown, a four-sided pyramid whose dominant dimension tv radial direction is larger than the diameter d of at least about the cylindrical area 10 of stem 1. Accordingly, a stepped passage is available between said tip 3 and said surface 10 of stem 1. 31, near which the tip 3 is preferably equipped with a clip 32.

Glava 2, ki v prikazanem primeru opremljena z ravno čelno ploskvijo 20, na proti konici 3 obrnjeni strani 21 pa z blago konusno in proti konici 3 izbočeno notranjo površino 21. Neposredno ob glavi 2 je steblo 1 odebeljeno s konusnim, v smeri proti glavi 2 razširjenim odsekom 11 z dominantnim premerom D (Sl. 1), ki po eni strani zagotavlja ugodnejše napetostno stanje med prenosom navora z glave 2 na steblo 1, po drugi strani pa ob privitju vložka v fasado privede do zagozdenja stebla 1 v trši pokrivni sloj fasade in s tem pripomore k še zanesljivejšemu sidranju vložka v fasadi.The head 2, which in this case is provided with a flat face 20, with a slightly conical and convex inner surface 21 at the tip 3 facing side 21 and a convex inner surface 21 directly adjacent to the head 2. extended section 11 with a dominant diameter D (Fig. 1), which, on the one hand, provides a more favorable stress state during the transfer of torque from the head 2 to the stem 1, and on the other hand, when the insert is inserted into the facade, leads to a wedge of the stem 1 in the harder cover layer of the facade and thus contributes to an even more secure anchoring of the insert in the façade.

Sidranje vložka v fasado, sestoječo iz termoizolacijskega sloja iz razmeroma mehkega gradiva in znatno tršega prekrivnega sloja, s katerim je proti zunanjim vplivom zaščiten prej omenjeni sloj, poteka na tak način, da konico 3 vložka v položaju vsaj približno pravokotno glede na zunanjo površino fasade pritisnemo ob pokrivni sloj fasade. Zatem po namestitvi ustreznega orodja - npr. izvijača - v ustje 40 zagotovimo ustrezen navor ob sočasnem vzdrževanju pritiska v osni smeri vložka od glave 2 proti konici 3. V takem stanju konica 3 zahvaljujoč svoji piramidasti zasnovi in postopni abraziji prekrivnega sloja fasade ta nazadnje omenjeni sloj fasade predre in s tem utre prosto pot steblu 1, nakar skozi omenjen prekrivni spoj fasade vstopi tudi vijačnica 5, ki si skupaj s steblom 1 utira pot skozi termoizolacijski material. Zahvaljujoč svoji vitki zasnovi in razmeroma veliki površini vijačnica 5 tvori povsem zadovoljivo osnovo za čvrsto sidranje stebla 1 v omenjenem termoizolacijskem sloju fasade. Tik preden glava 2 naleže na zunanjo površino pokrivnega sloja fasade, se konusni odsek 11 zagozdi v luknjo v omenjenem pokrivnem sloju. Zahvaljujoč blago zaokroženemu radialnemu robu 51 in prav tako blago zaokroženemu vogalnemu območju 52 vijačnica 5 med vrtenjem vložka bodisi med privijanjem ali tudi med odvijanjem vložka brez vsakršne znatne abrazije in slehernega omembe vrednega poškodovanja površine drsi po površini fasade. Po privitju vložka v fasado lahko z enakim orodjem v luknjo 4 vložka privijemo ustrezen nosilni vijak. Po odstranitvi vijaka je možno vložek iz fasade odstraniti in ga po izbiri na isto mesto ponovno namestiti.Anchoring the insert into the facade, consisting of a thermal insulation layer of relatively soft material and a substantially more rigid overlay that protects the aforementioned layer against external influences, is carried out in such a way that the tip of the insert 3 is pressed at least approximately perpendicularly to the outer surface of the facade. along the cover layer of the facade. Then after installing the right tool - e.g. screwdriver - ensure adequate torque at the mouth 40 while maintaining pressure in the axial direction of the insert from the head 2 towards the tip 3. In this condition, the tip 3 thanks to its pyramid design and gradual abrasion of the facade overlay, this last facade layer penetrates and thus paves the free path the stem 1, and then a helix 5 enters through said facade overlay, which together with the stem 1 makes its way through the thermal insulation material. Due to its slender design and relatively large surface, the helix 5 forms a completely satisfactory base for firmly anchoring the stem 1 in said thermal insulation layer of the facade. Just before the head 2 contacts the outer surface of the cover layer of the facade, the conical section 11 is wedged into a hole in said cover layer. Thanks to the slightly rounded radial edge 51 and also to the slightly rounded corner area 52, the helix 5 during the rotation of the insert or during screwing or also during unwinding of the insert without any significant abrasion and any significant damage to the surface is sliding over the surface of the facade. After screwing the insert into the facade, the corresponding tool screw can be screwed into the hole 4 of the insert with the same tool. After removing the screw, it is possible to remove the insert from the façade and optionally replace it.

Claims

PATENT APPLICATIONS

A facade screw insert consisting of at least approximately a cylindrical stem (1) provided with a centrally located and longitudinally extending blind hole (4) adapted to receive the respective supporting screw and comprising at one end the head (2) and the tip (3) at the remaining end, said hole (4) forming a receptacle for receiving on its side facing surface (20) of the head (20) with its outward open mouth (40). in each case, a suitable tool for securing the insert to the facade of the required torque, and wherein on said stem (1) there is further provided in the profile a highly flattened helix (5) whose outer diameter is substantially greater than the diameter (d) of the stem itself (1), and extending in the direction from the tip (3) towards the head (2) and terminated at a distance from said head (2), characterized in that the tip (3) is designed as with its apex in the direction away from the head (2) pyramid whose dominant radial dimension (/) is greater than BC emera (d) of at least about the cylindrical area of the stem (1), in which a truncated conical section (11) extending toward the head (2) is provided in the area immediately adjacent to the head (2) and whose diameter (D) is dominant also larger than the diameter (d) of at least about the cylindrical area of the stem (1), and at the same time the helix (5) at the distance from the head (2) is completed with a slightly rounded radial edge (51) and a slightly rounded corner area (52) between said the edge (51) and the circumference of this helix (5).

Facade screw insert according to claim 1, characterized in that the tip (3) is formed in the form of a four-sided pyramid.

Facade screw insert according to claim 1 or 2, characterized in that the tip (3) is provided with a snap (32) directly at the stepped passage (31) in at least about the cylindrical area of the stem (1).

Facade screw insert according to claim 1, characterized in that the helix (5) is formed on at least substantially cylindrical section of the stem (1) starting from the stepped passage (31) to the tip (3) towards the head (2) and completed at the axial distance from the head (2).

Facade screw insert according to claim 4, characterized in that the screw (5) forms 2.5 to 3.5 full sheaths along its entire length.

Facade screw insert according to claim 4 or 5, characterized in that the screw (5) forms at least about 3 full sheaths along its entire length.

Facade screw insert according to the preceding claims, characterized in that the facing surface (21) of the head (2) is conically designed and convex towards the tip (3) towards the tip (3).