CH652806A5 - FASTENING DEVICE. - Google Patents

Description

The invention relates to a fastening device with a further advantageous possibility is that the anchor rod and one is arranged in a destructible container under the influence of the granulate. The

Anchor rod supplied heat fusible plastic 20 destructible container can be made of plastic, for example. Paper or glass. The granules are loose in the

For anchoring a fastening element such as a container and closing it. When instructing an anchor rod in a borehole, the heated anchor rod will basically melt or the container will borrow two options. After the first possibility, it will be mechanically destroyed.

Anchoring through mechanical expansion in borehole 25 Special requirements are met for the plastic material. To do this, great forces must be exerted in order. On the one hand, this is intended to generate a relatively low melting well to produce the required high spreading pressure. point and on the other hand have a high strength. In order to improve the application of such due to these pressure conditions, it is expedient that the plastic body dowels are not possible everywhere. For example, has an additive for fasteners. The additive can be in the granules with a small edge spacing, there is a risk of blasting. 30 itself arranged or mixed with it.

In such and similar applications, in which the additive can be fibrous, flaky or spherical.

Generating a high spreading pressure in the borehole that is not shaped and is metallic, organic or inorganic is desirable, so-called composite or adhesive anchors. Glass, for example, can be used as the fibrous additive. The components of a curable asbestos or carbon fibers as well as steel wire are used. Mixtures are usually placed in separate, destructible containers in Bohr-35. All of these substances have a certain heat-resistant hole and speed in the borehole, destroying the container. After the plastic has hardened, the fibers form mixed with one another. This type of anchoring is mainly a reinforcement. Talc and mica are very suitable as flaky additives because of the separate packaging of the components. Usable spherical agile and the required mixing of the components additives, for example quartz powder, glass balls or in the borehole are not without problems. In addition, the curing is 40 steel shot. Spherical additives have the advantage that the time during which the dowel is not yet loadable does not result in a notch effect.

very much dependent on the ambient temperature. Various thermoplastics can be used as plastic materials

To the described difficulties with composite or thermosets are used. Are particularly suitable

To bypass adhesive anchors, it is already known to produce a hollow body made of synthetic material, which can also be melted at a certain temperature in a thermoplastic, such as polyamide or polyphenyl sulfide (PPS), under the trade name “Rayton”. The volume of material to be inserted into the borehole and by introducing the part of the additives can be approximately 15 to 60%. The density of the heated fastening element in the borehole of at least part of the plastic body can melt, depending on the requirements of the setting method. However, a hollow body has the disadvantage that the fastening speed can be changed. It also becomes corresponding that its inner diameter must be matched to the fastening to be inserted - the compression of the plastic body when inserting the element. The manufacture of the hollow body-50 anchor rod more or less large. For recording material-pers is relatively complex. Melting the massive plastic with high strength can also plastic bodies of high hollow material requires a lot of energy. Density can be used.

The invention has for its object a simple, from The invention will be explained below with reference to, for example, an anchor rod and a reproducible drawings fusible with heat. It shows plastic body existing fastening device 55 show:

fen, which is universally applicable and only low heat of fusion Fig. 1 requires a plastic body according to the invention in one. lead into a borehole;

According to the invention, this is achieved in that FIG. 2 drives the heated anchor rod into the

Plastic body made of thermoplastic or thermoset granulate the borehole provided the plastic body.

consists. 60 Fig. 1 shows a granulate according to the invention

The plastic body is preferably made as a solid body - plastic body 1 when inserted into a borehole 2. The plastic body 1 forms and is thus at a certain outside diameter, it has a cylindrical shape and its outside diameter for a certain hole for receiving differently sized essentially corresponds to the diameter Anchor rods suitable. The art of the borehole 2, which is made of granulate. The granules are aggregate bodies and are easier to melt than a corresponding solid 65 tert. The plastic body 1 can also additives, such as ver body. If softened, the individual granules - for example glass or asbestos fibers - can be contained. These additional grains move against each other without completely increasing the strength of the plastic body 1. The density is melted. By inserting the heated anchor of the plastic body 1, depending on the application, various

652 806

which are chosen large. In order to avoid confusion, the granulate can be colored differently depending on the use, for example for concrete, brick or gas concrete.

2 shows the driving in of an anchor rod, denoted overall by 3, into the plastic body 1 inserted into the borehole 2. The anchor rod 3 is provided with a thread 3a over its entire length and has a roof-shaped cutting edge 3b at its front end. Both the thread 3a and the cutting edge 3b are, however, only practical designs and are not absolutely necessary for the fastening device to function. Instead of the thread 3a, for example, bead-shaped ribs can also be provided on the shaft of the anchor rod 3 in order to achieve a positive fit. Before the anchor rod 3 is driven into the plastic body 1, the anchor rod 3 is heated to a temperature just below the melting point of the granulate. When the anchor rod 3 previously heated to approximately 180 to 350 ° C. is driven into the plastic body 1, the granules are softened and brought into a plastic state,

without melting. The anchor rod 3 is driven in by means of a setting tool 4 in a striking or rotating manner. When the anchor rod 3 is driven in, the softening granules are compressed in the borehole 2 and thus adapt on the one hand 5 to the geometry of the borehole 2 and on the other hand to the shape of the anchor rod 3. This adjustment also leaves larger dimensional deviations, both of the borehole 2 and the anchor rod 3, without any significant disadvantages.

Instead of sintering the granules together to form a shaped body, the granules can also be arranged in a destructible container, for example made of film, paper or glass.

The plastic body 1 can contain more or less large amounts of additives in addition to the granules. These 15 additives consist, for example, of glass or asbestos fibers and increase both the strength and the temperature resistance of the anchoring. A major advantage of the proposed attachment is the problem-free storage of the plastic body and the immediate resilience 20 of the attachment after the setting process.

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1 sheet of drawings

Claims (4)

652 806 2 PATENT CLAIMS The plastic material is pressed against the deepest hole and compressed. With thermoset material, such as 1. Fastening device with an anchor rod and a white epoxy resin or polyester resin, takes place during the setting process under the action of supplied by means of the anchor rod by the applied pressure and the heat of a heat-fusible plastic body, thereby marked 5 hardening. The plastic mass of the Geo-net adapts to the plastic body made of thermoplastic or thermoset geometry of the borehole. That may exist between the granules. Air volume present through individual granules is determined by 2. Device according to claim 1, characterized in that the anchor rod is taken. The insertion of the anchor rod that the granules are sintered. can, for example, by hitting a hammer or 3. Device according to claim 1, characterized in that 10 take place rotationally. that the granules are arranged in a destructible container. The plastic body can be designed in different ways 4. Device according to one of claims 1 to 3, characterized in that. For reasons of handling, but also for reasons of cost, it is characterized that the thermoplastic or thermoset granules are expedient, that the granules are sintered. The sintering of one additive contains. Granules are made by pressing the body under increased 15 temperature. The pressure and heat generated thereby "bake" the individual granules into a dimensionally stable body.