CZ177498A3 - Boring-in bracket - Google Patents

Abstract

Boring bracket (10) for hanging heavy objects for example, radiators, on the wall, consists of a span a dowel (12), which consists of a cylindrical housing (16); in which the axial cut extending over its entire length is formed (18), in which a cone (22) is provided, provided with two from with an axial spacing arranged conically t regions (26, 28), wherein from the cylindrical housing (16) spaced anchors (12) up to the threaded hole (24) of the cone (22) engages a bolt (20) that is on the front face (60) of the cylindrical sleeve (16) passes through the drilling head (14) a bracket (10) for supporting or suspending the heater or similarly, the cylindrical housing (16) is spaced from its ends provided with internally oriented constrictions for the abutment of the cone (22) and on its front face (60) is encircled by the drill bracket head (17). Curse are formed by the circumference of the cylindrical sleeve (16) spaced and axially cylindrical (16) running recesses (30) between which they are in cylindrical the housing (16) is formed further, only in part length running cuts (32, 34).

Description

Technical field

BACKGROUND OF THE INVENTION The invention relates to a drilling bracket for hanging heavy objects, such as heaters, on a wall consisting of an expansible plug comprising a cylindrical housing in which an axial cutout extends over its entire length and in which a cone provided with two apart with an axially spaced tapered region, wherein a spigot extends into the cylindrical sleeve of the expansible plug into the threaded tapered bore that extends at the front face of the cylindrical sleeve through the head of a drill bracket to support or suspend the heater; provided with inwardly directed constrictions for engaging the cone and is encircled by the head of the drilling bracket on its front face.

BACKGROUND OF THE INVENTION

A drilling bracket of this kind is already known from DE 33 36 168 C2. The disadvantage of the known drill bracket is, on the one hand, that it consists of a relatively large number of components, which complicates and increases the cost of manufacture and can be a problem during assembly, and that it has proved to be insufficiently stable in some areas of application. It has been found, for example, that the plastic cone extends in length when the bolt passing through it and may even tear the front, first conical region of the cone from its rear conical region. In addition, it has been shown that for some building materials and shapes of drilled holes in the wall, the front end of the drill bracket is not in the wall.

9 9 9 9 9 9 sufficiently stable to hold. The drill bracket head can then jam against the cylindrical bushing, thereby affecting the load-bearing capacity of the drill bracket.

Boring brackets are also known which consist of fewer components and in which stability is increased by additional leaning against the wall. In this connection, reference can be made to DE 195 10 781 A1. On the other hand, only a single cone is used in this drill bracket, so that the expansion is less uniform along the length of the cylindrical sleeve and problems can again arise in certain wall materials. In addition, the stepping or stepping of the drill bracket, which has been used, also means that it has to protrude more from the wall in order to accommodate the additional stepping.

console in which is

The drill includes a cone, a cutout formed in the rear to prevent the attachment screw.

both of the above described with a projection which fits into the end of the cylindrical bushing and the co-rotation of the cone in the embodiments to serve to attract

For the sake of completeness, reference may also be made to DE 39 08 639 A1, which discloses a drilling bracket with a sleeve for attaching a heater to a wall and to which a tightening ring which is supported against the wall and after expansion the front end of the housing prevents axial movement of the expansible plug further into the wall.

SUMMARY OF THE INVENTION The object of the present invention is to simplify their construction without losing their advantageous properties, in particular as uniformly as possible over the entire length of the cylindrical sleeve, in view of these drawbacks of the known drill brackets. Addition

Their stability should be as high as possible, even if the cone is made of plastic.

Furthermore, the drill bracket should be designed so as to allow additional lining at the point where it protrudes from the wall, without the need for additional elements extending from the plane of the wall. In addition, the drill bracket design should be designed such that such additional elements can also be pulled out together with the drill bracket before final clamping of the drill bracket, for example to otherwise adjust the depth of insertion of the drill bracket into a hole drilled in the wall.

SUMMARY OF THE INVENTION

Said set of tasks is at least partially solved by a drill bracket for hanging heavy objects, for example heating elements, on a wall consisting of a spacer, which consists of a cylindrical sleeve in which an axial cutout extends over its entire length and in which a cone is arranged provided with two conical regions spaced apart from one another with axial spacing, wherein a bolt pin extends into the cylindrical sleeve of the expansible anchor up to the threaded cone bore and extends at the front face of the cylindrical sleeve through the head of a drilling bracket to support or suspend the heater; spaced from its ends with inwardly directed cone-shaped constrictions and encircled on its front face by the head of the drilling bracket according to the invention, which consists in that the constrictions are a plurality of recesses extending over the circumference of the cylindrical sleeve and extending in the axial direction of the cylindrical sleeve, between which there are further recesses in the cylindrical sleeve,

Β · ·· Β · · · · · · ·

Β Β ΒΒΒ ΒΒΒ · «Β« «« «« «« «« «« «« ΒΒΒ

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Po '* · ΒΒ ΒΒ ΒΒ ΒΒ ΒΒ only a portion of its length extending through cutouts.

This solution achieves that, on the one hand, only a one-piece cylindrical sleeve is used, as opposed to the prior art, according to which the halves of the sleeve must be held together by locking rubber rings, but on the other hand a substantially uniform expansion of the cylindrical sleeve the sleeves, both in the longitudinal direction and around the circumference of the cylindrical sleeve. Manufacturing is simplified because only one sheet metal member is punched and bent, again, unlike the prior art, according to which two such members and other additional components are required, which then have to be assembled lengthwise to one another in the production process.

It has proven to be particularly advantageous if three cylindrical pockets, each of which are substantially 120 [deg.] Rotated relative to one another, are formed on the cylindrical sleeve, the axial cut-out running along the entire length of the cylindrical sleeve and one of two further cut-outs. substantially only within the axial length of the indentations. This is sufficient to achieve a largely uniform material compression.

In the same direction, further advantages are obtained if, according to another embodiment of the invention, the axial cut-out which extends over the entire length of the cylindrical sleeve extends into a further cut-out near the rear face of the cylindrical sleeve.

In relation to the shape of the cone, it has proven advantageous, as in the prior art, if the cone is provided with two conical regions with mutually different maximum diameters spaced apart from one another in the axial direction, the first conical region with a smaller maximum diameter abutting the recesses.

in a cylindrical housing. According to the invention, this solution is improved by providing a further cut-out at the rear face of the cylindrical sleeve, which is arranged opposite the axial cut-out extending along the length of the cylindrical sleeve and shorter than the axial cut-out. housings, separated here by cutouts. This results in halves of the cylindrical housing whose surfaces can be spaced evenly from each other.

In order to avoid problems with the stretching of the plastic cone, which is provided with a pair of conical regions, it has been found to be advantageous if the screw pin in a further preferred embodiment of the invention extends to the rear face of the cylindrical housing. In this way, the plastic material is only subjected to compressive forces, thereby eliminating the tensile stress of the material, which is particularly undesirable for plastics. Stretching of the cone to length is also avoided.

As in the prior art, it is advantageous if the cone is provided with a projection which fits into a recess in the rear face of the cylindrical bushing, but which not only serves to secure against rotation as in the prior art, but also performs other tasks. According to the invention, this projection extends beyond the outer circumference of the cylindrical housing. By engaging this projection in the axially extending recess of the cylindrical sleeve, it is possible for the cylindrical sleeve, together with the cone, to be retracted from the hole drilled in the wall even when the drill bracket has already been tightened.

For this reason it is also advantageous if the projection on the cone is formed on its cylindrical region which is located between the conical regions, preferably at a distance from the beginning of the second conical region which corresponds to the axial length of the slots.

- 7 • ·

Které »· • · which extend from the rear face of the cylindrical housing.

In order to further stabilize the cylindrical sleeve, especially at the front end in problematic wall materials, it has proven to be advantageous if the cylindrical sleeve is provided with a plastic ring which can be inserted on it, in which an axial cutout is formed and which has a conical outer periphery.

By means of this plastic ring, the front end of the cylindrical sleeve is supported in the wall. This is particularly advantageous in. in the event that the opening of the drilled hole into which the drill bracket is to be inserted widens. The drill bracket is then better supported by the additional plastic ring in the drill hole widening. In order that this additional plastic ring does not remain trapped in the wall when the drill bracket is withdrawn again to adjust its position, it is preferable that the projection on the cone projects beyond the outer periphery of the cylindrical housing. By this measure it is achieved that this protrusion at. pulling the drill bracket out of the wall will inevitably also carry this plastic ring and cylindrical sleeve.

On the other hand, the projection does not interfere with the final expansion of the cylindrical sleeve in the masonry, since it can be cut off from the plastic cone during the final tightening, so that it is no longer disturbing.

In some drill bracket applications, it is preferred that the drill bracket head is secured against rotation on the cylindrical housing. For this purpose, according to a further embodiment of the invention, a solution is provided in that at least one tooth protrudes from the front face of the cylindrical bushing and is pressed into the material of the head that surrounds the front face. b page. If the head is made of a material harder than the mass, for example metal, according to another invention, the bearing surface for the front face of the sleeve inside the head can be provided with toothing.

is an artificial cylindrical design

As in the prior art, it is advantageous if the head has a hexagonal circumference for engaging the wrench in the region where it surrounds the front face of the cylindrical bushing so that the head can be held or rotated to a certain position. This is particularly advantageous if the region of the head that surrounds the front end of the cylindrical housing is adjoined by an eccentric portion of the head, on which a bearing surface in the form of a notch for a support foot or the like of a heater or the like is formed.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated by the following non-limiting examples, which are described in the accompanying drawings, which show:

- on giant. 1 overall perspective view of the drill bracket according to the invention; - on giant. 2 detail view of respective expanding screw flail; - on giant. 3 a look at the plastic cone itself that is used in FIG. 1; - on giant. 4 a view of the additional ring being used FIG.

ftft ftft • ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft · ftft ft ft ft ft ft ft ft ft

Fig. 5 is a view of the housing and head of the drill bracket in the opposite direction to Fig. 1;

FIG. 6 shows details of an embodiment of the head;

7 in FIG. 8, facing the head, the facing end of the double tooth housing on the front side; and a schematic representation of the housing cut-outs and indentations.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a perspective perspective oblique front view of a drill bracket 10 consisting of an expansible plug 12 with an eccentrically disposed head 14 at its front end. The expansible plug 12 consists of a cylindrical sleeve 16 with an axial cutout 18 extending along the entire length of the cylindrical sleeve 16. Through the cylindrical sleeve 16 a bolt 20 extends, which is screwed into a threaded bore 24 of a cone 22, preferably plastic. . The cone 22 is provided with two conical regions 26, 28 spaced apart in the axial direction.

The cylindrical sleeve 16 is provided with axial spacings from both ends thereof with constrictions or inwardly oriented recesses 30 which, when the cone 22 is pulled into the cylindrical sleeve 16, can come into contact with the cone 22, namely its first conical region 26 . The front end of the cylindrical sleeve 16 is encircled by the head 14 of the drill bracket 10, this head 14 being an eccentric - see FIGS. 1 and 5. As shown in the drawing, said constrictions are formed more over the circumference of the cylindrical sleeve 16 by in the axial direction. It is preferred that three such φ φ φ φ φ φ be used

- 9 * φ Φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ ’φ φ

φ φ φφ recesses 30, which are rotated by approximately 120 ° relative to each other according to FIG. In each case approximately halfway between these recesses 30, further cuts 32, 34 are formed which extend only over a portion of the length of the cylindrical sleeve 16, so that finally between each pair of adjacent depressions 30 there is a cutout, whether axial cutout 18. the housing 16, or the cutout 32 or 34, which is shorter. These slots 18, 32, 34 allow the material of the cylindrical sleeve 16 to extend close to each recess 30 by the first conical region 26 of the cone 22, evenly over the entire 360 ° circumference of the cylindrical sleeve 16, 34, which extend axially along the indentation areas 30. Since the further slots 32, 34 extend only over a portion of the length of the cylindrical sleeve 16, the cylindrical sleeve 16 is not split into thirds, similar to the halves of the prior art, so that the cylindrical sleeve 16 does not disintegrate into a single part. to be held together by special devices such as rubber rings as described in the prior art.

As a result, a uniform expansion of the cylindrical sleeve 16 over its entire circumference is achieved at the first conical region 26 of the cone 22.

In order to keep the expansion as uniform as possible also in the longitudinal direction of the cylindrical sleeve 16, the cone 22, as in the prior art, is provided with a second conical region 28 which cooperates with further cutouts 38, 40 extending inwards from the rear face 36 of the cylindrical sleeve 16 and allow the thus-formed halves 42, 44 of the cylindrical sleeve 16 to extend apart. One such cutout 38 may coincide with an axial cutout 18 which extends over the entire length of the cylindrical bushing 16, but is preferably widened over this axial cutout 18. Other · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The cutout 40 may be disposed opposite the cutout 38, having only a limited length, and preferably does not extend up to the area of the cutouts 32, 34 which are spaced from both ends of the cylindrical sleeve 16.

As can be seen in FIG. 8, the slots 18, 32, 34 are spaced 120 ° at the periphery of the cylindrical sleeve 16, thus allowing a relatively uniform expansion of the entire circumference of the cylindrical sleeve 16 at the first conical region 26 of the cone 22. the slots 38, 40 have an angular spacing of 180 ° to each other, and the pair of slots 38, 40 also allows a relatively uniform expansion of the cylindrical sleeve 16 at the location of the second conical region 28 of the cone 22. It is also advantageous that the cutout 40 in the end region of the cylindrical sleeve 16 extends exactly between the cutouts 32, 34 in the central region of the cylindrical sleeve 16 and thus does not interfere with their function.

As in the prior art, there is also a projection 22 on the cone 22 which, when the cone 22 is inserted into the rear end of the cylindrical sleeve 16, can engage in one of the slots 38, 40. This projection 46 prevents the cone 22 from co-rotating In order to clamp the drill bracket 10. In the prior art, the corresponding projection is formed on the outer conical region, while in the solution according to the invention this projection 46 is arranged on the cylindrical region 48 of the cone 22 which extends between the two conical regions 26, 28. This solution has the advantage that the projection 46 can act over a longer axial length of the cutout 38, 40. This has the further advantage that the projection 46 can then assume another function, namely to increase the bearing accuracy of the cylindrical sleeve 16. in the borehole, simply so that, for example, when the cylindrical sleeve 16 is inserted too deep, the cylindrical sleeve 16 may retract a little and the protrusion 46 engages the inner end of this movement.

·· φφ φφ Φ'φ φ φφφ φ φ ·

φ φφ φφφ φ φ φ φ φ φ. Thus, it is not so important that the cylindrical sleeve 16 is mounted in a head 14 which surrounds the front edge of the cylindrical sleeve 16, since the head 14 is co-extracted by the screw pin 20 when the head 14 is pulled out. which is connected to the cone 22, and by a protrusion 46 on the cone 22.

It may also be mentioned that the axial length 76 of the two slots 38 and 40 of the projection 46 of the cone 22 from the beginning of the second conical region 28 may be approximately equal. Due to this measure, the projection 46 remains intact until the drill bracket 10 is firmly clamped in its final position. In this case, the cone 22 is inserted into the cylindrical sleeve 16 and the projection 46 is then optionally cut off by the end of the cutout 38 or 40 of the cylindrical sleeve 16 during this movement. But it doesn't matter at this point.

The bolt 20 is preferably designed to extend to the end of the cylindrical sleeve 16 at the beginning of the clamping and thus engage the cone 22 not only at its first conical region 26 and the cylindrical region 48, but also into its second conical region 28 so that the cone 22 exerts a pressure along its entire length, thereby preventing the cone 22, which is usually made of plastic, from being stretched.

Referring to FIG. 4, a plastic ring 50 is shown as an additional component, the inner diameter 52 of which allows the cylindrical sleeve 16 to slide in its original, unstretched condition. The outer periphery of the plastic ring 50 is preferably conical so that the outer diameter 54 at one end of the plastic ring 50 is somewhat larger than the outer diameter 56 at its other end. This tapered plastic ring 50 is slid onto FIG.

4 ·

4

44 • 4 4 • 4 44

4 4

44 4 4 - 4 4 5

4 4 4

In the embodiment of FIG. 1, an axial cutout 58 is formed in the plastic ring 50 to facilitate sliding of the plastic ring 50 onto the cylindrical sleeve 16 in the event that this cylindrical sleeve 16 has a somewhat larger diameter or is slightly extended.

The purpose of this arrangement 150 of the plastic ring 50 is to underlay the front end of the drill bracket 10 in a drilled hole which widens conically at its inlet end due to impure drilling or unstable wall material. The plastic ring 50 and 150 respectively provide additional lining of the drill bracket 10 in the wall material.

It can be seen from FIG. 7 that one or two teeth 62 protrude from the front face 60 of the cylindrical sleeve 16 which, when the front end of the cylindrical sleeve 16 engages the tightly formed annular space 64 and the end of the sleeve 16 abuts the bottom 66 of the annular sleeve. space 64 presses the head material 14 into the plastic material. As the bolt 20 is tightened, pressure is exerted by the teeth 62 in the region of the bottom 66 into the material of the head 14. This ensures that the head 14 cannot rotate relative to the cylindrical sleeve 16. This is advantageous at the moment when the load on the heating element foot is transferred to the eccentrically arranged cylindrical sleeve 16, which would tend to move the cylindrical sleeve 16 from its eccentric position if it is not in its lowest position.

If the material of the head 14 is relatively stiff, for example the head 14 is of metal, a secure connection can also be achieved by turning the ring 66 so that teeth are formed on the bottom 66 of the annular space 64.

ft ft ft ft ft ft ft ft · ft «ft. ftft · ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft • ftft · ft ^; ft ftft • ftft ft ft ft ft ft ft ft ftft

Prior to the final tightening of the bolt 20, for example, the eccentric head 14 can be adjusted by setting the jaw wrench in the region of the hexagon 68 to adjust the heater seating height. This is also described in detail in the prior art.

The heater may be mounted, for example, by placing the heater foot with its lower edge in a slot 70 that may be defined by a front ring 72 and a rear ring 74, as also described in the prior art.

Claims (12)

PATENT CLAIMS A drill bracket (10) for hanging heavy objects, such as heaters, on a wall consisting of an expansible plug (12) consisting of a cylindrical sleeve (16) in which an axial cutout (18) extending over its entire length and wherein a cone (22) is provided with two conical regions (26, 28) spaced apart axially from one another, wherein a screw pin engages a cylindrical sleeve (16) of the expansible plug (12) up to the threaded bore (24) of the cone (22). (20), which on the front face (60) of the cylindrical sleeve (16) passes through the head (14) of the drill bracket (10) to support or suspend the heater or the like, the cylindrical sleeve (16) is inwardly spaced from its ends oriented constrictions for engaging the cone (22) and on its front face 60 is encircled by the head (14) of the drill bracket (10), characterized in that the throttles consist of a plurality of circumferentially extending cylindrical sleeves (16) and axially extending the cylindrical sleeves 116) extending recesses (30), between which further slits (32, 34) extending over a portion of its length are formed in the cylindrical housing (16). The drill bracket according to claim 1, characterized in that three cylindrical pockets (30) each rotated substantially at 120 ° relative to each other are formed on the cylindrical sleeve (16), and are formed along the entire length of the cylindrical sleeve (1). 16) an axial cut-out (18), one of the two cut-outs (32, », ···) 4 4 Φ 'i? »· · · · · < Κ ^κ «· φ φ φ φ φ φ φ 9 9 4 34) which extend substantially only over the axial length of the indentations (30). Drilling bracket according to claim 2, characterized in that the axial cutout (18) extending over the entire length of the cylindrical sleeve (16) extends near the rear face (36) of the cylindrical sleeve (16) into a further cutout (38) . The drill bracket according to claim 2 or 3, wherein the cone (22) is provided with two conical regions (26, 28) spaced apart from one another in axial spacing with different maximum diameters, the first conical region (26) having a smaller maximum diameter. it abuts against the indentations (30) in the cylindrical sleeve (16), characterized in that a further cut-out (40) is formed at the rear face (36) of the cylindrical sleeve (16) opposite the axial cut-out (18) running along the entire length of the cylindrical sleeve (16) and is shorter than the axial cutout (18), the second conical region (28) abutting the halves (42, 44) of the cylindrical sleeve (16) separated by the slots (38, 40) . Drilling bracket according to claim 4, characterized in that the bolt (20) extends as far as the rear face (36) of the cylindrical bushing (16). Drilling bracket according to claim 3, 4 or 5, wherein the cone (22) is provided with a projection (46) which fits into a recess (38, 40) in the rear face (36) of the cylindrical bushing (16), wherein said protrusion (46) extends beyond the outer periphery of the cylindrical housing (16). 443 4 4 4 4 4 44 · 4 44 44 4 4 ·· 4 · · 4 4 4 4 4 4 4 · 4> Drilling bracket according to claim 6, characterized in that the projection (46) is formed on the cone (22) on its cylindrical region (48) which is located between the conical regions (26, 28), preferably at a distance (78) from the beginning of the second conical region (28) corresponding to the axial length (76) of the slots (38, 40) that extend from the rear face (36) of the cylindrical housing (16). Drilling bracket according to one of Claims 1 to 7, characterized in that the cylindrical sleeve (16) is provided with a plastic ring (50, 150) which can be inserted on it. Drilling bracket according to claim 8, characterized in that an axial cutout (58) is formed in the plastic ring (50, 150). Drilling bracket according to claim 8 or 9, characterized in that the plastic ring (50, 150) has a conical outer circumference. Drilling bracket according to one of Claims 1 to 10, characterized in that at least one tooth (62) protrudes from the front face (60) of the cylindrical bushing (16) and is pressed into the material of the head (14) which surrounds this head. the front face (60). Drilling bracket according to claim 11, characterized in that the bearing surface (66) for the front face (60) of the cylindrical bush (16) inside the head (3.4) is provided with a toothing. * 99 · 9 9 9 · ··· 9 9 ··· £ ·· 9 9 · · · 9 ~ · · · ·. · »« • 9 · · 9 8 «·· · · Drill bracket according to one of claims 1 to 12, confesses č u j so that that the head (14) has in the area, where surrounds the front front the cylindrical side (60) bushings (16), hexagonal circuit (68) for deployment jaw wrench. Drilling bracket according to claim 13, characterized in that in the region of the head (14) which surrounds the front face (60) of the cylindrical bushing (16), an eccentric bearing surface (70) in the form of a cut-out for the support a foot or the like of a heater or the like.