DE1802964A1 - Sleeve anchor - Google Patents

Description

Patent attorney

Dipl.-lng. E. Eder

Munich 13, EHsabethsfr. 34

643Ü

Phillips Brill Cor. Wany

Il-sleeve anchor.

The invention relates to anchors for concrete, Ilauerwerl; u. df; l. of the Species in which there is a .'iantel, the flat one from oineo Blank has been shaped, which is punched out and -u a sleeve which coat has been rolled into a drilled hole with an iK tapered plug inserted in its end and into the Hole for spreading the used linden and thus for anchoring the jacket and thus for anchoring the: 'part in the hole has been driven in. The sheath of these anchors is hardened and provided with teeth and is also used in Lohren. The end of the Ilantel opposite the splayed end is provided with an internal thread for receiving a bolt, so that the expanded anchor has a dowel in the V.'and, in the Forms floor or ceiling, to which components are attached can.

The invention described in detail below provides improvement Eire 're ^ enüber a sleeve anchor is having a hollow tube, which in the above-described' is formed .'eise north, but is not bestinrvt to _: ^nn: -onren his

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own hole used to v.'erdon, so that it is not hardened, Instead, a hole is drilled in the masonry and the conical one Stopper is a training uie with an elongated Threaded bolt ordered from one piece, the sicii fully extends through the hollow bore of the tube and at its outer end survives. The conical formation is arranged so that it protrudes directly from the inner linden of the pipe, i.e. on that j-inde, which is furthest in the hole, and can be drawn into the bore of the pipe in order to expand it. .. 'e'nn the threaded bolt in the. axial obligation ": for example -

"is drawn wisely by teasing the mother who is screwed onto the outer end of the bolt, the slides conical training in the bore of the pipe and exercises a wedge = v; Effect on the spreader from »The pipe is at the bottom of the hole by the action of the nut (which usually - with a Washer is provided) spread, which counteracts an axial movement of the tube, since the end of the tube is outside of the hole against the bottom of the nut (and their washer). This expansion in the first phase secures or sets the sleeve anchor in the hole. Further tightening of the "mother" now has an effect on the. Meaning of a shortening of the tube, which can be wiped off by using or wrinkling efea metal strips Ends of the tube is made possible, which strips through a Number of axial slots formed v / earth, which are located in the area - " direction of the pipe are at a distance from each other "and strive to bend, aaeii on the outside, ». so that you be pressed against the inner wall of the hole »

The second phase when tightening the Ilutter intended to dienea ₈ Ilutter firmly against the component to press, .the to X'jsrden held against the FIA = before the masonry or Betoalcörpers ", whereby it is clamped in position =

To use the fiülseaanker, the component is equipped with a . Provided a hole that brought against the surface of the concrete body and the hole in the concrete is covered with a hard metal!

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od. d ^ l. of substantially the same diameter as the hole drilled in the component. A relative ^fi : e fit is advantageous. The assembled armature is selected in its outer Antel by Esser so, this ate substantially equal to your diameter of the predrilled hole in the masonry is. The butter is screwed onto the protruding part of the inner bolt until the bolt no longer has any oil, without, however, initiating the erosion of the lower end of the tube. In the case of the iwuuf, the anchor is preferably assembled like this. In this state, the anchor is inserted into the hole in the masonry through the hole in the hole in such a way that the underside of the nut and its washer firmly touched the surface of the building element, in which state the nut through the two preceding The spreading phps described is rotated.

The problem solved by the discovery primarily concerns the failure to fully expand the inner end of the sleeve in the setting of the anchor, whereby the failure of the anchor is reduced to that which is caused by the previously described second spreading phase and only through a part, \; <3xin at all, of the first phase is achieved.

A study of the circle: of sleeve anchors of this type, pezei, c: t, that both phases of expansion give the best potential if they take place at the same anchor. It has been found that often a clamping between the ünterkante aes tube and the conical surface of the conical formation takes place of ilutter with previous anchors during tightening. -When this happens, the first spreading phase is limited. It is possible that nothing else happens, but in most cases some friction has to take place between the neighboring ends of the hole at the bottom of the anchor, as will be explained below. The first "ewo. ^ Ung of the conical formation in the ^ efeilfe iZnd des xühres ua,: ΐ, .- r i ^: ^ 'X' / - ' _f aal' which : 'an te.!. Part ^ op ^ en the l \: ind üos Loc ^ s ^: ;;. '* .. i * ^; i - :. "" - "- vertien, whereby ei« certain (IrJ.tevcrr.i "qen U'-Mch Ifl'. 'vn ^ ο.? · ~. \ -' · - ^:. ν .. '^ - tU

909848/0474 bathroom original

A further expansion is then opposed to a strong resistance and this is the point at which something must give way as the nut continues to tighten at the thread angle of the bolt will. The lower edge of the previously used. Anchor sleeve penetrates the surface of the conical design as the bolt is not hardened, so that further relative movement between the pipe and the bolt on the inner end of the pipe cannot take place. Instead, the metal strips are grounded between the middle slits deformed and in contact with the! «and the pre-drilled one Bent hole. This gives the appearance that the anchor has been set well, however tests have shown that in such cases the Iialtebarkeit reduced against anchors where there has been full expansion of the inner ends of the tubes. It is believed to be preferable is that only the first spreading phase takes place instead of just the second spreading phase. With the previous Aryans of those mentioned Art, the training is not such that both phases can be achieved with a high degree of certainty. In fact is no Sleeve anchor known, in which the first expansion phase is inevitably ensured. IVif the first spreading phase is ensured it is possible to have an anchor without intermediate slots and to produce strips in which only the first spreading phase takes place. There will be both types in a single anchor preferred for the reasons explained below.

Another problem with previous learners is that the bolt is too free from the tube. Since the fully assembled anchor is sold in this condition, the nut must be screwed onto the bolt end when installing, which process is difficult when the bolt rotates freely. It would therefore be desirable to provide means to prevent the bolt from turning slightly with respect to the pipe. Furthermore, when using such anchors, the nut must often be removed during installation, for example when the hole is in the Component must not be larger than the bolt diameter «In this case, the outer end of the tube is supported against the inner surface of the component instead of against the chuck and the bottom ^ -

"309848/04 74 - '·

IIIIH'llH | i I'PPPIH'PliPPinillPri "ΊΙΊΙΙΙΊΙΙΙΙΙΡΡΊΙΙΙΙιιΙΙΙΙΙΙΙΙΙΙΙιΙΙΙ HIP 'I I Ii l | ii || ι ι Ιιιιΐΐΐρίριιίριι Ii i | h

'"" J ¹ FS ¹ ! ¹

disk off. Under such conditions, the failure of the Bolt out of the pipe annoying and time-consuming. With the previous sleeve anchors, no means are provided to prevent such occurrences can prevent.

The invention therefore relates to a sleeve anchor for concrete or “brickwork to set in a pre-drilled hole a component when tightening a nut with a threaded part a bolt is in engagement, which latter is coaxial with the anchor sleeve and protrudes from this, the bolt at its inner end within the hole has an enlarged conical design and the sleeve with incisions their "iantelende is provided, which during a wedging movement of the conical design in the j'antelende when tightening expand the cutter to a certain first spreading phase to effect, characterized in that the sleeve jacket has a weakening which jams with the conical Prevented training during the first splay.

The invention is further characterized by turning the use at least one projection on the inside of the sleeve which rests against the body of the bolt to prevent the Bolt slightly dre: it with respect to the sleeve and a vertical one Movement.

The invention is further characterized by the weakening mentioned and in addition through axial slots in the sleeve to form axial strips that rest against the outside of the! '.' and of the hole can be deformed, and bring about a second expansion phase following the first expansion phase.

In the accompanying drawings show:

Fig. 1 is a view in elevation of a sleeve anchor according to the invention inserted into a hole in readiness for expansion and against a structural element;

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Fig. 2 is a view in section along the line 2-2 in Fig. 1 in the specified direction;

Fig. 3 is a plan view of the developed sheet metal blank, / from the the sheath of the anchor according to Fir .. 1 is rolled to form the same;

Fig. 4 is a view in section along the line 4-4 in Fig. 3 in the specified direction;

FIG. 5 is a partial view in section along the line 5-5 in FIG and in the direction indicated, but on an enlarged scale;

Fig. Ό a partial view in section through a sleeve anchor according to Fig. 1 inserted into a drilled hole and about to be anchored;

Figure 7 is a partial view in elevation of the lower end of a Anchors of modified form;

8 and 9 are views similar to those of FIGS. 1 and 3 are, however, another embodiment of the invention correspond;

Fig.Io a view similar to FIG. 6, but in this Case of the sleeve anchor γοη shown in Fig »S Embodiment;

FIG. 11 is a view similar to FIG. 8, but in this one Case of the sleeve anchor of the embodiment shown in Fig. 1 and additionally has two extension » sleeves for receiving a longer bolt; -

Figure "12 is a view in section along the lines 12-12 is Fig ll _o in the direction indicated;

Fig «13 is a view in elevation of an anchor if the same

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Embodiment as in FIG. 11, but in which only one is relatively short extension tube is used;

14 is a view, partly in section, of a sleeve anchor similar to that shown in Fig. 1, but using a different nut shape, the anchor with two spreading stages is shown spread;

15 and 16 are views in section or partially in section two additional Iiutter forms, which in the inventive Sleeve anchors can be used;

17 shows a side view of an anchor sleeve without axial intermediate slots and strips.

The anchor described in more detail below consists of three main parts assembled from an outer sheet metal tube or from consist of an outer sheet metal sleeve, furthermore of an inner threaded bolt with a conical plug formation on his lower linden and from a nut that is screwed onto the upper end of the bolt. Usually a washer is provided under the hat or it can be the washer consist of one piece with the mother. In use, a hole is usually drilled in the concrete of a length that sufficient to ensure that the entire sleeve enters, whereupon the assembled anchor enters the hole through a structural element inserted and the bolt is tightened by tightening the nut. This creates the conical training pulled into the lower end of the sleeve, whereby this is spread and the resulting divided liantel parts into the walls of the Hole are keyed, whereby the anchor is fixed within the hole. This is the first phase of expansion of the anchor By further tightening the nut, the metal strips are twisted and outwards against the viand of the hole twist, itfas corresponds to the second spreading phase.

The sleeve cutter described in the previous paragraph is of the

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Manner in which the application of the invention is intended. The invention ordered in the. Means for weakening the lower end the sleeve, as well as the rattles that hold the sleeve and bolt together, as further described below.

The terms "above", "below", "inside" and "outside" are only related to the drawings and the pre-drilled holes. The anchors can of course be in any other arrangement be used.

The terms "Iiülse", "casing" or "tubular" are not h "limited to a single element or a single part In arrangements in which relatively deep holes and / or long bolts are required, uninterrupted extension sleeves for pressure transfer to the split end of the sleeve can be used.

The anchor, generally designated 2o, is a combination of parts consisting of an elongated sheet metal sleeve 22, an internal threaded bolt 24, a nut 26 and usually a washer 28. The sleeve 22 is formed by using a flat sheet metal blank from the one shown in FIG shown is rolled into a cylindrical tube. As Fig. 3 shows, the blank having an upper uninterrupted part 3o, an arrival v number of elongated, axially extending slots 32, which form between them metal strip 34, and a lower part, the axially extending in the expandable segments 36 cuts 38 is divided, which begin at the lower edge 4o and. end at the ends of two slots 32. When the right and left edges of the blank shown in FIG. 3 are brought into abutment, which is the case when the blank is rolled, they form a seam 42 which runs the full length of the sleeve through a Slot 44 extends, the halves of which are formed by recesses 44a along the opposite edges of the blank «The seam also extends through the uninterrupted part 3o _e

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The described polling creates three incisions in the linde of the sleeve 22, two of which through the actual incisions 38, while one is geo-formed by the seam 42.

The lower L ^; The end of the blank is provided with a knurling 46a, as shown in FIG. In the same way, the blank is formed adjacent to the edge 4o, for example by means of a pressing or pre-molding, with a flat groove 48a which extends fully over the blank so that it has an annular groove 48 in the sleeve forms.

In certain of the strips 34 two recesses 5o are pressed, which form inner projections 52. In many cases only a single one is sufficient for the intended mode of operation Head Start.

Inside the armature 2o there is a bolt 24 with a End 54 in the form of a conical plug and a shaft, which over a substantial part of its upper lindes with a thread 56 is provided. The nut 26 is on the top end of the Boifeens screwed on. The plug end 54 is cylindrical Foot part 55. The nut 26 is shown as a hexagon nut, however, other shapes for the butter can be envisaged, as shown in FIGS. 14, 15 and 16.

As mentioned, a hole 58 is drilled in the concrete body or in the structure or the like, which is denoted by 6o, and an assembled anchor 2o is inserted through a structural element 61, for example through the base of a machine In general, the component 61 has a thickness which is not greater than the axial length of the uninterrupted part 3o, but this is only a matter of structural design, since the uninterrupted part 3o has any desired length

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can be produced. As explained in connection with Figures 12 and 15, instead of being made in one piece with sleeve 22, the seamless portion may be formed by one or more independently formed sleeves which are carried by the same pin and ground act as a continuation of the same. During handling, the armature is held assembled, since the projection 52 presses against the shaft of the bolt 24, preferably on the threaded part 56, whereby the two are secured to one another, even if the nut 26 is removed. In addition, prevented when the nut 26 anc for tensioning of the bolt; ezop-en to be, the force acting on the shank of the bolt protrusion 52 whose rotation, so that the tightening of the nut can be started, although the w assembly normally urged substantially in front of the Iiinsetzen (if the nut does not need to be removed to insert it into the hole) to initiate the wedging effect »

after the anchor has been inserted into the hole, if the Nut 26 is rotated, the conical end 54 of the bolt 24 pulled up into the lower end of the anchor, through the "dumbbell parts 36 is spread along the incisions 38 and the seam 42. This can best be seen in FIG.

The expansion described above was previously referred to as the expansion of the first phase, if this is initiated, _ the nut 26 and its washer 28 are firmly against the The surface of the structural element 61 is pressed, which in turn rests against the surface of the concrete body 6o. If accepted the bolt 24 begins to move axially upwards, he strives that to press the upper end of the sleeve against the washer 28, and this resistance causes the conical formation 54 the shell parts 36 spreads to wedge it firmly against the inner wall of the hole 58. This does not necessarily put a pressure on the top of the component exercised »·

Now consider a condition in which the sleeve 22 and the bolt 24 are jointly immovable in engagement with the wall

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of the hole 58 are secured. Another turn of the nut 2 (5 a resistance is opposed by the sleeve, however the bolt cannot move, at least in theory. The sleeve 22 is permanently compressed so that the strips 34 usually strive to fold outward, twist or twist. This represents the second expansion phase and results in the clamping pressure against the component 61, to tighten this against the body 6o. This sleeve pressure is axial.

The zweiphasire spread foregoing is probably the most effective use of the anchor, but, in the previous anchors was vie mentioned, often only a spreading of the second phase and sear little obtained from the first phase. When the nut is twisted, in a considerable number of cases, by the first part of the stimulation of the first phase, the mantle of the previous, sleeve anchor is spread apart in contact with the found of the hole. This should be about the "lowering" as it is shown in Fig. 3, as far as the bolt movement is concerned Strips as shown at 34 ^f . The "creeping" felt by the paving person is deceptive, as is the resistance when the strips are wedged in the hole.

The installation obtained is a combination of only part of the stimulation of the first phase and the expansion of the second phase. The point at which clamping occurs depends on the difference in diameter between the sleeve 22 and the hole SV. away. In theory, if the sleeve diameter is very close to the diameter of the hole, chafing will start immediately, but this is not likely. It can be seen that there is sufficient spreading so that the liantel parts 36 come to rest against the inside of the hole. This yields only a limited strength and is in the clem. Trap not reliable because of the degree and shape of the deformation and

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the wedging of the strips cannot be predicted. ?. 'elcher Crad of obsolescence can be ascribed to the strips themselves cannot be determined with certainty ^ but the spread of the first phase is solely with regard to the holding capacity the spreading of the second phase and a partial spreading uiiF survive the first phase. Both together certainly add up better and more reliable installation.

The problems of spreading the sleeve anchors of the previous type stem primarily from the fact that the lower edge of the 4o iluntel of the previous anchor clamped in the conical formation 54 and a further wedging movement when the

"Strip 54 opposes a resistance, so that only one partial spread of the first phase is obtained before the spread of the second phase. In the inventive, in 1, the weakening has the shape of a groove 48 which weakens the front edge 4o of the sleeve so that that a spreading of the first phase takes place, the edge 4o tending to expand outwards, like "shown in Fig. 6. The mutual obstruction adschen dem lower edge 4o and the conical surface is therefore reduced to a minimum and a good spread of the first Phase achieved before a spread of the second phase takes place. Experiments have shown that the kaite power of a such anchors are superior to those of anchors that have no weakened parts * v / whether the reason for this is the foregoing described mode of action is likely to be attributed.

The knurling 46 in some cases contributes to the holding capacity, but is for the described mode of operation of the anchor not essential. The knurled ring 46 is against the Iiand of the hole pressed when the conical formation 54 and its foot 55 move upwards inside the bore of the sleeve 22, what by the small contradiction of the edge 4o against movement of the conical surface is ensured *

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In Fig. 7 a further embodiment of the invention is shown, in which the lower end of the anchor is tooth-shaped, as shown at 64, '.'fenn the nut on the threaded end of the Bolt 24 is tightened, digs the lower end of the anchor The insufficient contact surface is not in the conical loil 54, but rather slides and creates at most flat ones riuten at the mentioned curses, so that a nuto spreading effect; we get u.

Lei of the embodiment according to Fin, 8 and D, the anchor 7o Tenau is designed like the anchor 2o, with the exception that no knurled part is provided, the de; r. Part 46 corresponds. Furthermore, no hat 48 and no fences 64 are provided in the case of the anchor 70 ^; 'ffmmg 72 provided, which openings form the weakening in the form of a perforated * .; and. As soon as the outward pressure is exerted, the holes tend to widen as a result of the bend at the sections 74 along the lugs. This he-Uut also an r; ute spreading the first Thase \ ^r or the SpreizuiifT-the second phase.

As mentioned, it is occasionally necessary, since ^{1 of} the bolt 24 is proportionally longer than the one in I- Lr :. 1 and °> e2ei ^v; "ten bolts," i / hen the hole 58 does not provide sufficient S ^ iolraun in iiähe the surface of the body over 6o lii ^ t or vernältnismässi? thick component 61 is attached to ground vmP ·, a long bolt is used, so that the sleeve 22 must be of an appropriate length. Instead of making the sleeve 22 long, from the reading point of view of economical manufacture it is more practical to use extension sleeves. Such sleeves are shown at; lo, u2 and 84 in FIGS. 11, 12 and 13. Functionally, the sleeves form continuations of the main sleeve 22 and serve to transfer the compressive force exerted on the sleeve 22. The extension sleeves are much more economical to manufacture because they can be made either seamlessly or with a seam, as indicated at 86 and 8fl. In the latter case they can be rolled, as set out in connection with the manufacture of the sleeve 22, or it can be in each

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Case the sleeves are brought on the market in the form of long tubes, which pipes then according to the respective requirements for the anchor can be cut to size. The extension sleeves should have the corresponding inside and outside diameter Dimensions of the sleeves 22 with which they are to be used / grounded, be adjusted.

Since the bolts 24 their threaded portions 56 normally closer to their have outer ends, the deepenings are preferably in an extension sleeve is provided, as shown in FIG.

The extension sleeves in fact form extensions of the untarn Invoice s free part of the sleeve 22 and are equivalent to this.

Various shapes can be provided for the nuts, for example in the form of a nut 25 'with a slotted one round head which is provided with a shaft 9o into which the bolt 24 can be screwed. The shaft diameter is the same as that Outside diameter of the sleeve 22, so that "the shaft into the opening of the workpiece 61 as well as into the hole 58, if necessary.

The representation given in FIG. 14 shows both spreading phases. At the The lower end of the anchor is the conical portion 54 in the bore the sleeve 22 entered so far that its cylindrical extension 55 is fully within the bore. This has led to that the shell parts or segments 36 have been fully spread so that they are jammed in the V / and of the hole and held immovable. The good spread of the first phase was through the presence of the groove 48, as mentioned, brought about.

The 'effects of the spreading of the second phase are also through the twist and deformation of the strips, as shown at 34 '■, displayed. Theoretically, the strips wedge themselves into the wall, the hole and, to a certain extent, result in a

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Additional holding capacity and indeed it can be established that the element 61 is pressed more firmly against the surface of the body 6o, i.e. when the second phase has spread. The design of the strips 34 'is not to be read as restrictive, since the type of S'ircizunp cannot be predicted. The relative diameters of the sleeve and the hole, the metallurgical texture & s .letalIs, the composition of the body of concrete or other iiaterial, the other dimensions of the armature and the magnitude of the applied torque all contribute to the nature and Ueise wherein, in v / hich the strips give way and become deformed. This unpredictability makes the spread of the second phase unreliable and indicates that it is not necessary to ensure the spread of the first phase for reasons of reliability.

FIGS. 15 and 16 show two additional liutternformen designated ^flt 26 "and 26. The first is a .'iutter with an oval slotted head 92, while the second is a sleeve 94 having for the fastening of wires or Hangern each one is. formed with a hollow threaded shaft 9o.

As the spread of the first phase through the use of a training 4S, 64 or 72 can be ensured, a Luisenanker can can be produced without the need for the Slots and strips 32 and 34. In this case there is no expansion of the second phase, but the holding capacity is still better than that of an anchor, which has a small epistaxation of the first phase and a complete expansion the second phase has. The sleeve of such an anchor is shown in Fig. 17 at loo. They are the same Cezi ^ digits used for elements that are common to the previously described sleeve 22-.

Patent attorney

Dipl.-Ing. E. Eder

Munich 13, Elisabethstr. 34 Claims;

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Claims (1)

Dipl.-lng. E, Eder Munich 13, Elisabelhslr. 34 P ate η ta η si) r ϋ cue 1. Sleeve anchor for concrete or masonry to be fixed in a pre-drilled hole by a structural element when tightening a nut that is screwed onto a threaded part of a bolt, which bolt is coaxial with the anchor sleeve and protrudes from this and also at its inner end is provided inside the hole with an enlarged conical design, the sleeve is provided at its jacket end with incisions which cause the expansion during a wedging movement of the conical configuration in the sleeve to bring about a certain expansion of the first phase, characterized in that the Iiülsenmantel is designed with a weakening, which prevents jamming with the conical design during the expansion of the first phase » Sleeve anchor for concrete or masonry for fixing in a pre-drilled hole through a structural element when tightening a nut that is screwed onto a threaded part of a bolt, the latter is coaxial with the anchor sleeve and transfers from it and also an enlarged conical at its inner end inside the hole Training aufitfeist "the sleeve is provided with incisions at its shell end , which cause the expansion during a ■ wedging movement of the conical formation in the sleeve when turning the nut, to bring about a certain first expansion phase, characterized in that at least one projection on the inside the sleeve is formed, which rests against the body of the bolt. 909-848 / 0474 BATH ORIGINAL Sleeve anchor for concrete or masonry for fixing in one pre-drilled hole through a component when tightening a nut screwed onto a threaded part of a bolt is which the latter is coaxial with the anchor sleeve and protrudes therefrom and further inside at its inner end of the hole has an expanded conical design that The sleeve is provided with incisions at its end of the jacket, which the spreading during a wedging movement of the conical design cause in the sleeve when the [iutter is rotated for a certain first expansion nose, characterized in that that the Ilülsenmantol with a weakened part against Clamping the conical formation during the first expansion phase is formed and axial slots form axial strips in the sleeve at a distance from the weakening, which strips are deformable outwards in contact with the edge of the hole, followed by a second expansion phase following the first Bring about spreading phase. 4. Iiülsenanlcer according to claim 1 or 3, characterized in that the weakening is adjacent by at least one annular groove the shark end of the sleeve is formed, which is the thickness of the Sleeve significantly reduced at this point. 5. sleeve anchor according to claim 1 or 3, characterized in that that the weakening is formed by a perforated band part, which is obtained by lying parts of the: iantels will. 6. Iiülsenanlcer according to claim 1 or 3, characterized in that that the weakening is formed by a design at the jacket end of the sleeve, which is a non-contiguous system of the jacket end results in the conical training. 909848/0474 7. sleeve anchor according to claim 6, marked cMurca, ciai. the mentioned Training is formed by a number of teeth. o. sleeve anchor according to claim 1, 2 or 3, characterized in that that at least one additional tubular sleeve of iin essential the same diameter as the tubular sleeve is provided and with one of your customers to the first one ii sleeve is arranged abutting, the derr. mentioned! iantelende is opposite. 9. sleeve anchor according to claim 1 or 3, characterized in that,. daP < a projection is provided on the inside of the sleeve for friction contact with the wood. Io. Sleeve anchor according to Claim 2 or 9, characterized in that the projection is arranged so that it is on the bolt on a threaded part the same is applied. 11. Iiülsenanker according to dsn claims 1 - Io, characterized in that the sleeve has an annular knurled bar on the dumbbell. Patent attorney, Dipl.-Ing. Munich 15. Express delivery frtfrr. 34 ■, 9 0.9 BU 8 / CK 7 A BATH