DE8702771U1 - Device for driving in piles - Google Patents

Description

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Device for driving in piles

The innovation concerns a device for driving wooden or metal posts into the ground. Such devices are known and essentially consist of tubes with caps firmly attached to their upper ends, weighing the same as a sledgehammer (10 kg). Using U-shaped brackets attached to the tube and positioned opposite one another, these devices are placed over a post to be driven in, manually lifted and dropped so that the caps mentioned above act on the head of the post and drive it into the ground.

It is not just the relatively high total weight of such devices that is required to drive in posts quickly and effectively that is a hindrance to the work. The U-shaped brackets attached to the side of such a pipe and serving as handles, which are parallel to the pipe and the post to be driven in, i.e. pointing upwards, also require a firm grip. Otherwise, the brackets can slip out of your hands. Another disadvantage of such a device is that the brackets that are firmly attached to the pipe require unfavorable lifting heights. In particular, when positioning a post to be driven into the ground, the device must be lifted very high.

The aim of the innovation is to create a device that is easier to use and whose handles can be easily adjusted to different lifting heights. According to the innovation, this is achieved by having the heavy disk attached to a tube so far away from the upper edge of the tube that the distance between the edge and the disk corresponds to about a quarter of the length of the tube. Furthermore, a guide rod is firmly inserted in the middle of the heavy disk. At the end of this protruding outwards there is a thread.

onto which a lid can be screwed to close the tube. Between the inside of the lid and the heavy disc, several additional weight discs with central holes can be inserted.

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Finally, handles are arranged at the lower end of the tube, vertically to the tube axis, and are height-adjustable. The handles can be adjusted in rails arranged opposite one another on the tube by means of square nuts sliding in the rails in a torsion-proof manner, into whose threads threaded inserts inserted in the middle of round handles can be screwed. Furthermore, according to the innovation, a semi-circular guide bracket, the radius of which corresponds approximately to that of the tube, is attached to the downward-facing ends of the rails. It can also be useful to attach a ring between the rails, the inner and outer diameter of which corresponds to that of the tube.

Finally, the lid is provided with a handle for screwing onto the guide rod.

The drawing shows an embodiment according to the innovation and is described in more detail below. It shows:

^; j?ig. 1 the view of a device, Fig. 2 a section along the line AA of Fig. 1, Fig. 3 the enlarged cross section of a rail with square nut and handle and

Fig. 4 shows a ring fixedly arranged between the rails. According to Fig. 1, the device consists of a tube 1 in which a heavy disk 2 is fixedly inserted. A cover 6 rests on the upper edge 3 of the tube and can be screwed onto the thread 5 of the guide rod 4 by means of a handle 16. Weight disks 8, 8 ^' provided with holes 7, 7' can be inserted between the inside of the cover 6' and the disk 2. Rails 10, 10' are attached, e.g. by welding, to the lower end of the tube 1, into which handles 9» 9' are inserted in _a height-adjustable manner. This shows the dot-dash position B of a handle.

Furthermore, according to Figures 1 and 2, a semi-circular guide bracket 13 connects the rails 10, 10 ^' . The radius of the guide bracket corresponds to that of the pipe 1 and has the task of guiding the device when lifting on the post 17, which is to be inserted into the ground 18, or of avoiding excessive tilting when lifting by means of handles 9, 9'.

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The weight disks 8, θ ¹ do not only serve the purpose of changing the effective weight of the device at will. Rather, the effect of inertia or inertia is used in the weight disks. If, after the device has been raised, it is dropped onto the head 17' of the post 17, the weight disks 8, 8* remain in a position above the heavy disk 2 for fractions of a second. They therefore fall back onto the heavy disk 2 a little later than the disk 2 hits the head of the post, which means a second impact when the device is lifted.

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In order to be able to adapt the handles 9, 9* to the ergonomic requirements for handling the device when using posts 17 of different lengths, the handles are adjustable in height, as mentioned above.

For this purpose, according to Fig. 3, square nuts 11 are inserted into the rails 10, which have an approximately omega-shaped cross-section, in a way that prevents them from twisting and can be moved up and down. The threaded bolts 12, which are firmly inserted into the handles 9, can be screwed into their threads.

By turning the handles, they can now be loosened and pushed into the required position in the rails 10 and tightened again by turning in the opposite direction.

In order to achieve better central guidance of the device during use, it may be expedient to provide a ring 15 as shown in Fig. 4 between the rails 10, 10' instead of the guide bracket 13 as shown in Fig. 1 and 2. This also stabilizes the rails better than the bracket 13.

Claims (5)

&Mgr;&igr; r · r · e · r * - &bgr; it« ■····· ■ «&bull;13 I «It*··* ·· * S chut &zgr; claims before 1. Device for driving wooden or metal posts into the ground, consisting of a tube which fits over a post and at the upper end of which a heavy disk which acts on the head of the post is firmly inserted, and which furthermore has handles attached to the tube for lifting and then dropping it, characterized in that the heavy disk (2) attached in the tube (1) is far enough away from the upper edge (3) of the tube that the distance to the edge of the disk corresponds approximately to a quarter of the length of the tube, that furthermore a guide rod (4) is firmly inserted centrally in the disk (2), at the outwardly projecting end of which there is a thread (5) onto which a cover (6) can be screwed by means of a centrally inserted thread, between the inside (6') of which and the disk (2) there are several additional, e.g. B. two weight plates (8, 8') provided with central holes (7, 7*) can be inserted and that finally at the lower end of the tube (1) round handles (9, 9') are arranged which are height-adjustable and whose axes are perpendicular to the axis of the Rcares (1). 2. Device according to claim 1, characterized in that the handles (9, 9') in rails (10, 10') arranged opposite one another on the outer walls of the tube (1) are height-adjustable in that square nuts (11) slide in the rails in a torsion-proof manner and threaded bolts inserted centrally in handles (9, 9') can be screwed into their threads. 3. Device according to claims 1 and 2, characterized in that a semicircular guide bracket (13), whose radius corresponds approximately to that of the pipe (1), is attached to the downwardly pointing ends of the rails (10, 10'). ■ &igr; j &igr; rj iti ■ ·■ · 1 &igr;· TÖ7 I · · 4. Device according to claims 1 and 2, characterized in that a ring (15) is fixedly arranged between the rails (10, 10'), the inner and outer diameters of which correspond to those of the pipe (1). 5. "Device according to claim 1, characterized in that that the cover (6) is provided with a handle (16) for screwing onto the guide rod (4). ItItIIII