DE9407474U1 - Gas concrete dowels made of plastic - Google Patents

Description

PATENT ATTORNEYS I '.'... Accreditation: I I'. .

DiPL-iNG. CONRAD KÖCHLING \. ^: ... ^: ' ^: 7. ^: ... ^J ~ K ^: ~T "

DlPL-ING. CONRAD-JOACHIM KÖCHLING ^Note - ^{: 0B0} Bettermann OHG

Hiiingser Ring P. O. Box 2069, D-58020 Hagen

Fleyer Straße 135, D-58097 Hagen _{n co} -7in μj

Call(0233i)8ii64 + 85033 D-So/LU Contact

Fax(02331) 84840

Telegrams: Patent Cook Hagen

Accounts: Commerzbank AG, Hagen 3515095 (bank code 45040042) ———— _ — - —— -- — -

Sparkasse Hagen 100012043(BLZ45050001)

Postgiro: Dortmund 5989-460 (BLZ44010046)

VNR: Ll 58 51

Serial No. UM7/94

from i: May 1994

CJK/Hi.

Plastic aerated concrete dowels

The invention relates to a plastic aerated concrete dowel for holding a nail clamp, consisting of an expandable dowel body with protruding wings.

Aerated concrete dowels of this type are widely known in the state of the art. To insert such aerated concrete dowels into aerated concrete blocks or the like, it is necessary to first pre-drill a corresponding hole with a drill. The dowel can then be driven into this hole and spread by screwing in screws or the like. The radially protruding, essentially axial or spirally running wings press into the cavity of the aerated concrete block or the like as the screw is screwed in, thus ensuring a secure position.

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Such dowels are not suitable for holding nails and therefore nail clamps.

Based on this state of the art, the invention is based on the object of creating a gas concrete dowel for holding a nail clamp, in which a secure and proper fit of the dowel and nail clamp is guaranteed after the driving-in process.

To solve this problem, the invention proposes that the dowel has a cylindrical receiving channel for

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Receiving the nail shaft of the nail clamp, that the receiving channel has a transverse slot closed at the edge at least on the mouth side and that the transverse slot is limited at its ends in particular by V-shaped, springy, expandable elements of the dowel.

This arrangement ensures that the aerated concrete dowel can first be driven into the aerated concrete material properly, for example by hammering, whereby the dowel is radially pre-stressed and the cylindrical receiving channel for receiving the nail shaft is narrowed. In addition, the legs of the preferably V-shaped spring elements of the dowel are elastically pressed towards each other, brought into contact with each other if necessary and held in place. The dowel is thus pre-stressed in the corresponding aerated concrete material. The nail of the nail clamp can then be driven in, whereby the pre-stress on the spring elements is increased by driving in the nail and their legs are spread so that despite the nail's impact movement, the dowel does not move further.

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into the aerated concrete material. The receiving channel for the nail shaft is then widened by the driven-in nail shaft, so that a secure fit of the dowel in the aerated concrete material is guaranteed over the entire length of the dowel, which is approximately the same as the length of the driven-in nail.

The preferably V-shaped spring elements not only ensure sufficiently secure pre-fixing in the corresponding hole in the aerated concrete material, but these V-shaped spring elements also ensure the cohesion of the dowel.

A preferred further development is seen in that the dowel consists of two essentially solid half-shells, which are separated by a separating slot running from the dowel head to near the dowel tip and which are connected to one another at the dowel tip by a material bridge and at the dowel head via the spring-loaded webs.

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In this way, the desired radial preload when driving in the dowel is further improved, as the separating slot running from the dowel head to near the dowel tip is narrowed, whereby the cohesion of the two approximately half-shell-shaped parts is achieved by the material bridge at the dowel tip and the spring-loaded web at the dowel head.

To facilitate the insertion of a corresponding nail into the receiving channel, it is also provided that the opening of the receiving channel is cylindrically expanded on the dowel head and the spring-loaded webs form the closed ends of the transverse slot crossing the expansion,

A particularly preferred further development is that the resilient webs are formed by - when viewed from above onto the dowel head - V-shaped strips of material of the dowel, the mouths of which face each other.

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Furthermore, it is particularly preferred that the resilient webs are formed onto a solid, longitudinally slotted core of the dowel, which has the receiving channel, at a radial distance from the receiving channel.

A preferred further development is seen in the fact that the dowel tip, seen in the cross section of a plane that runs transversely at right angles to the slot of the head that is closed at the edge, forms approximately an isosceles triangle, the outer surfaces of which are beveled converging towards each other.

An embodiment of the invention is shown in the drawing and described in more detail below. It shows:

Fig. 1 A dowel according to the invention in side view;

Fig. 2 also in a position rotated by 90° around the vertical axis;

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Fig. 3 shows the dowel in the view according to Figure 1 in a central longitudinal section;

Fig. 4 the dowel according to Fig. 2 seen in the central longitudinal section;

Fig. 5 the dowel in the position according to Figure 2 seen from above;

Fig. 6 shows detail VI of Figure 5 in an enlarged view;

Fig. 7 a dowel driven into the aerated concrete material in the view according to Figure 4 with a nail clamp placed in front of the head side;

Fig. 8 shows the anchor according to Figure 7 seen from the head side;

Fig. 9 the dowel including nail clamp in the driven position in the aerated concrete material.

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In the drawing, the aerated concrete dowel is generally designated with 1. It is used to hold a nail clamp 2, through which a nail 3 is inserted. The dowel body of the dowel 1 has, for example, protruding wings 4.

As can be seen in particular from Figure 4, the anchor has a cylindrical receiving channel 5 for receiving the shaft of the nail 3 of the nail clamp 2. The
Receiving channel has a peripheral
closed transverse slot 6, wherein the transverse slot 6 is limited at its ends by V-shaped spring elements of the dowel.

In the embodiment, the dowel 1 consists of two essentially solid half-shells 8, which are separated by a separating slot 9 running from the dowel head to near the dowel tip and which are
are connected to each other by a solid material bridge 10 and at the dowel head via the spring webs 7.

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At the dowel head, the opening of the receiving channel 5 is cylindrically expanded. The expansion is designated 11. The spring-loaded webs 7 form the closed ends of the transverse slot 6 crossing the expansion 11.

As can be seen in particular from Figures 5, 6 and 8, the resilient webs 6 are formed by V-shaped material strips of the dowel 1, seen in plan view of the dowel head, whose mouths face each other. The resilient webs 7 are formed onto a solid core of the dowel, which has the receiving channel 5 or the extension 11, at a radial distance from the receiving channel 5 or the extension 11.

As can be seen in particular from Figures 2 and 4, the dowel tip, seen in the cross section of a plane that runs transversely to the slot 6 of the head, which is closed at the edge, is designed approximately in the form of an isosceles triangle, the outer surfaces of which converge towards one another.

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are bevelled. The converging bevels are shown at 12. Figures 7 to 9 show the position of the dowel 1 in a hole in a gas concrete material 13. According to Figure 7, the dowel 1 is driven into the gas concrete material 13, whereby the receiving channel 5 as well as the corresponding longitudinal slot are narrowed to such an extent that the two dowel half-shells 8 are pressed against one another at least in the middle area. The V-shaped spring elements 7 are also pressed against one another to such an extent that there is practically no space between their legs, as can be seen from Figure 8.

Thus, a provisionally secure fit of the anchor 1 in the aerated concrete material 13 is achieved.

The nail 3 of the nail clamp 2 can then be driven into the dowel, whereby the nail shaft is first inserted into the extension 11 and then driven in by hammering. The corresponding receiving channel 5 expands as does the slot extending from it, whereby the opening area

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of the dowel 1, an expansion takes place so that the V-shaped spring elements 7 are spread at least slightly.

The invention is not limited to the embodiment, but is variable in many ways within the scope of the disclosure.

All new individual and combination features disclosed in the description and/or drawing are considered essential to the invention.

Claims (6)

OBO 11417/94 -12- Protection claims: 1. Aerated concrete dowel made of plastic for holding a nail clamp, consisting of an expandable dowel body with protruding wings, characterized in that the dowel has a cylindrical receiving channel for receiving the nail shaft of the nail clamp, that the receiving channel (5) has a transverse slot (6) closed at the edge at least on the mouth side and that the transverse slot (6) is limited at its ends in particular by V-shaped, springy expandable elements (7) of the dowel (1). 2. Aerated concrete dowel according to claim 1, characterized in that the dowel (1) consists of two essentially solid half-shells (8) which are separated by a separating slot (9) running from the dowel head to near the dowel tip and which are connected to one another at the dowel tip by a material bridge (10) and at the dowel head via the resilient webs (7). OBO11417/94 -13- 3. Aerated concrete dowel according to claim 1 or 2, characterized in that the mouth of the receiving channel (5) is cylindrically widened at the dowel head and the resilient webs (7) form the closed ends of the transverse slot (6) crossing the widened portion (11). 4. Aerated concrete dowel according to one of claims 1 to 3, characterized in that the resilient webs (7) are formed by - seen in plan view of the dowel head - V-shaped material strips of the dowel (1), the mouths of which face each other. 5. Aerated concrete dowel according to one of claims 1 to 4', characterized in that the resilient webs (7) are formed on a longitudinally slotted, solid core of the dowel (1) having the receiving channel (5,11) at a radial distance from the receiving channel (5,11). 6. Aerated concrete dowel according to one of claims 1 to 5, characterized in that the dowel tip in cross section OBO11417/94 -14- viewed from a plane that runs transversely at right angles to the slot (6) of the head that is closed at the edge, it forms an isosceles triangle, the outer surfaces of which are bevelled in a converging manner towards one another. · ·