SE437409B - nail plate - Google Patents

Description

sø @@ š2 @ = s lÛ ''20' 2 very important for the function of the nail plate, that these weakenings are reduced as much as possible. The object of the present invention is therefore to provide a nail plate of the type indicated in the introduction, in which two or more spikes are thus punched and bent out of each hole in the plate and in which at least parts of the side edges of the spikes are formed with a toothing and which nail plate is designed so that the punching hole for the spikes causes a substantially smaller weakening of the plate than is the case with previously known nail plates of this kind. "According to the invention this is achieved by placing the tooth on such side edges of the spikes bent out of a common punching hole in the plate, which are formed by a punching cut common to the tags in question, while the side edges of the spikes formed by punching cuts, which also form part of the edges of the hole, lack toothing, so that the edges of the hole are substantially smooth and have no marked incisions or protrusions, such incisions or protrusions in the edges of the punch hole, which a occurs with previously known nail plates of the type in question, namely gives rise to significant stress concentrations and fracture indications, which seriously impair the strength of the plate.

The invention thus achieves a nail plate in which the spikes are provided with the desired toothing, the total number of holes in the plate is comparatively small despite a relatively large number of spikes per unit area and at the same time the holes have a favorable shape from a strength point of view.

The invention will be further described in the following in connection with the accompanying drawing, which shows by way of example some embodiments of the invention, Figs. 1, 2 and 3 illustrating a first embodiment, in which two spikes are punched out and bent out of each hole in the plate; and Fig. 4 illustrates a second embodiment, in which three spikes are punched and deflected from the same hole.

The nail plate according to the invention illustrated as an example in Figs. 1, 2 and 3 consists of a plate 1, in which spikes g2 have been punched and raised out of hole 3 in such a way that each it, ff>: »1 @“ f, eooasza-s 3 punching holes 3 have given rise to two spikes 2. The bending points for the spikes 2 bent out of the holes 3 are denoted by 4. According to the invention, the common punching cut for the two spikes punched out and bent out of a common hole 3 2 so designed that this punching section gives rise to a toothing 5 on one side edge of each tag 2.

The punching sections which form the other side edges of the two spikes 2 and at the same time also form the edges of the hole_3, on the other hand, are straight, so that the edges of the hole 3 do not have any marked points or incisions which can give rise to stress concentrations and fracture indications.

In the embodiment of the invention illustrated in Fig. 4, three spikes 2 are punched out and bent out of a common hole in the plate 1. Also in this case, the punching sections which form side edges of adjacent spines are so designed that these side edges on the spines a toothing is obtained ', while on the other hand the punching cuts which also form side edges of the formed hole in the plate 1 are straight and have no toothing.

In this case, the middle tag 2 thus obtains a toothing on both its side edges. In this case, these teeth are advantageously offset relative to each other, so that the teeth in the two teeth are not located opposite each other. As a result, the strength of this thorn 2 toothed on both side edges becomes greater.

It will be appreciated that many different embodiments and modifications of a nail plate according to the invention are possible within the scope of the invention. Thus, for example, the punched and bent thorns can be made twisted and / or bent or bent in a cross section. This can further improve the anchors' anchoring in the wood material.

POQR QU: Lfíiïzv

Claims (3)

1., soods2a ~ z É 'se 4. Claim I. Nail plate, the spikes (2) projecting from the plane of the plate (I) are made by punching and bending the spikes in such a way that at least two spikes (2) are deflected from In a common hole (3) in the plate (1), and at least parts * of the side edges of the spines are toothed (5), characterized in that the toothing (5) is placed on such side edges of those from a common hole ( 3) in the plate (1) bent out the tags (2), which are formed by a punching joint common to the tags in question, while the side edges of the tags (2) which are formed punching cuts, which also form a part of the edge of the hole (3) lacks toothing, so that the edges of the hole (3) are substantially smooth and lack marked notches or protrusions. Nail plate according to claim 11, in which at least three spikes (2) are punched and bent out of a common hole (3) in the plate (1), characterized in that the tag located during the punching between two other spikes is provided with teeth (5) on both their side edges, these teeth being displaced relative to each other, so that the teeth in the two teeth are not located opposite each other. 3. A method of manufacturing a nail plate, in which - spines (2) are punched out in a plate (1) and bent out from the plane of the plate in such a way that at least two spikes are punched and bent out of a common hole (3) in the plate (1), characterized in that the two, adjacent side edge of each of these spikes forming the punching cut forming and bending apart, two side edge of each of these tags forming a punch , said side edges of the two barbs receiving a toothing (5), while the punching cuts which simultaneously form a side edge of a bent bar (2) and an edge of the hole (3) in the plate (1) are designed so that the side edge of the barrel toothing and the edge of the hole (3) become substantially smooth and without marked tips or incisions.