DE6602098U - NAIL WITH A LARGE HEAD DIAMETER IN RELATION TO THE SHAFT DIAMETER - Google Patents

Description

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BERQ DiPL .-! N®. STAFF

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Jan. 23, 1889

H 58 262747a Gbm
Attorney's file l4

HILTI AKTIENGESELLSCHAFT XN SCSiAAN (Liechtenstein)

Nagel rait in proportion snim the shaft diameter gnroasem fdh

The invention relates to a nail old in relation to the shank diameter, large head duffle, to be driven into hard recording material by means of hand or powder-operated bolt-setting devices, preferably devices "in which a hammer" piston transfers the driving energy to the nail head ",

With this type of fastening tool, a guide washer is pushed onto the shaft of the nail, which guides the front part of the nail. To simplify loading the device with one nail, it is advisable to use a guide washer with the diameter of the nail head in such a way instead of a second with the diameter of the barrel piercing tool to make large _B that this takes over the rear guidance of the nail in the course of the device. In this case, the diameter of the nail head corresponds to approximately two to three times the shaft diameter.

Now penetrates such a nail _fi wherein the head diameter in the • v ratio to Schaftdurchmesaer is relatively large ,, obliquely into the receiving material (for example, by striking a pebble in the concrete), it is at any prior "handener on energy or Reatenergie of the The nail head acting means (usually the haramer piston of the setting tool) the nail at its transition point from the shaft to the head is heavily loaded due to the increased torque due to shear and lingering stress. With known nails of this type

S before it, that as a result of the nail head is torn off from the shaft, "I The torn-off head to the Wegprallen the operator _f of the device or in the vicinity parties violate" In addition, the fall demolished Nagel as a supporting fastener out.

The invention is based on the object of avoiding the above-mentioned disadvantages in a nail of the type mentioned above,

According to the invention this object is achieved by _B but that the nail shank via a about the Schaftdurchinesser d is not less than O ₉ 5 d and not larger than I ₀ 5 d appropriate length is extended concave towards its rear part piece to the head and the extension curve in the first and seldom The third tsiv rises flat and in the third third it quickly becomes steeper and ends at the head circumference, which is formed by a flat edge that encircles the head and is embossed relative to the head height .

Such a combination of a "club-shaped" head shape with a predetermined breaking point rubbed through the circumferential flat edge, On the one hand, this results in a maximum absorption capacity of the bending and shear forces occurring at the transition area from the head to the shaft and all of the others If certain stresses are exceeded, first the circumferential Flat Konfrand is partially sheared off. Any excess after this work of deforming the head edge Powers are reduced to such an extent that they result in it The training according to the invention has a reinforced over-shaft / head anyway can no longer cause harm.

By partially shearing off or deforming the edge of the head becomes its coating force, i.e. its function as a holding means for example when attaching wooden slats to concrete, not impaired, so that in the case of the invention, the appropriate measure No steel washers, but destructible plastic washers can be used as front guide means.

The invention is now to be reproduced by way of example Figures are explained in more detail, namely show:

1 an embodiment of the invention and 2 masses Havels

Fig. 3 the lower portion of a bolt-firing tool in section and angled in the receiving material penetrated nail of FIG. 1

As shown in FIGS. 1 and 2, the designated as a whole by 1 | The nail is then attached to the cylindrical shaft 2 by a con * kav expanded section 3, a head 4 and a surrounding one flat edge 5 on.

III · · «

I I I I

II II

As can be seen from FIG. 3, a hammer piston 7 acting on the shaft 1 is mounted axially displaceably in a guide tube 6. In the example shown, the Mafsel penetrated the firing material at an angle; it can be seen from this that only the head edge 5 resting on one side on the firing material or the guide washer 8 is deformed. The head edge is torn at the predetermined breaking point.

6602

Claims (1)

1) 2) Hail with a head diameter which is large in relation to the shaft diameter ζώα fine drifting into hard recording material by means of hand-operated bolt set tools _p , i.e. the nail shaft (2) over a length of its rear part corresponding approximately to the shaft diameter (3) is widened concavely towards the head (4) and the widening curve rises only gently in the first and second thirds and the third third rapidly becomes steeper and ends at the head circumference, which is formed by an edge that runs around the head and is relatively flat at head height . Nail according to claim l characterized in _{s 0} that the upper Ausseniläcbe of the head A in a known catfish lens-shaped 1st.