OBJECT OF THE INVENTION

The object of this invention is a drill, for use in drilling a hole/recess in the ground, a road surface or a planted area, the drill being also used for making holes/ recesses for anti-tank mines.

PRIOR ART

Nowadays, anti-tank mine holes or recesses are made in the preparation of anti tank mine fields, wherein an anti-tank mine is placed in a hole or a recess and thereafter the anti-tank mine is covered, so that the enemy cannot see the anti-tank mine, the objective being to destroy the enemy vehicle with the hidden anti-tank mine. Another objective is to create anti-tank mine holes or recesses with no anti tank mines placed inside them, thereby slowing down the enemy advance, as all anti-tank mine holes or recesses must be searched. Two terms are used in connection with anti-tank mines, an anti-tank mine hole or an anti-tank mine recess, because in mine-laying on hard-surfaced road, (so-called asphalt roads, the process is referred to as perforating, and on gravel- or ground-surfaced roadways, the process is referred to as making a recess).

Nowadays, perforations or pits for anti-tank mines are implemented using a drilling head attached to a boom of a tracked excavator. Drilling heads have been in use in the defence forces for a long time, and drilling heads are also used in various mines, including coal mines.

A drawback of the current technology is having to arrange an excavator-specific fit for the drilling head. In addition, a separate energy supply line has to be set up from the excavator as they are not fitted with a hydraulic power take-off like tractors are. Further, there are few excavators in use and they must be transported on transport pallets, because chain tracks are not permitted on roads, and the tracks would reveal the location of the minefield to the enemy. A wheeled tractor or a truck moves fast and neither of them requires a transport carriage, and further, neither of them leaves revealing tracks on the road or on the terrain, rendering the mine undetectable.

PURPOSE OF THE INVENTION

The purpose is that a loader grapple attached to a timber or a general cargo crane of a tractor or a truck can be used for drilling a hole/recess in the ground, a road surface or a planted area. Further, the purpose is that the drill is used for making holes/recesses for anti-tank mines.

The above-mentioned drawbacks are eliminated and the above-mentioned objective is achieved with the drill according to the invention, characterized by what has been defined in the characterizing part of claim 1, the preferred embodiments being the object of claims 2 to 13.

The key advantages of the invention include the fact that a wheeled tractor or a truck moves fast, and neither of them requires a transportation carriage, and in addition, neither of them leaves revealing tracks on the road or the terrain, whereby the mining cannot be detected. Tractors and trucks are fitted with timber or general cargo cranes that can easily be equipped with a loader grapple. The term "grapple" is also used to refer to a loader grapple or a timber loader grapple, such as on the Internet page https://www.kesla.fi/en/products/category/grapples/, "The main grapple series is called proG and it consists wide variety of grapples starting from 0,18 m2 to 0,5 m2. In this series, special attention has been payed for optimal jaw geometry and also durability. No wonder it has gained good comments in tests (e.g. Finnish Koneviesti 12/2014 test winner) and from clients all over the world. These grapples are also compatible with loaders and cranes of other brands."

It is obvious that significant savings can be achieved with the use of the drill of the invention in making various holes or recesses.

LIST OF FIGURES

Next, the invention is described in detail with reference to the accompanying figures, in which figure 1 represents a drill according to the invention attached to a loader grapple of a timber or a general cargo crane, viewed diagonally from the front, figure 2 shows the drill according to figure 1 viewed from a perpendicular angle from the front, the drill being in the upper position with locking pins in place, whereby drill bit is prevented from moving downwards, figure 3 shows the drill according to figures 1 and 2 viewed from a perpendicular angle from the front with the locking pins removed, whereby the drill bit is allowed to move downwards, figure 4 shows the drill according to figures 1, 2 and 3 viewed from a perpendicular angle from the front with the locking pins removed, whereby the drill bit has been allowed to move downwards, figure 5 shows a sectional view of the drill according to figures 1, 2, 3 and 4 viewed from a perpendicular angle from the front with the locking pins in place, whereby the drill bit is prevented from moving down.

DETAILED DESCRIPTION OF THE INVENTION

The invention and the parts connected thereto shown in the present figures are not shown in scale, rather, the figures are schematic, representing the structure and function of the invention and a preferred embodiment thereof in principle.

The figures show the following parts of the apparatus according to the present method and the subparts thereof.

A grappling frame 1 comprising a top part la, a bottom part lb, two or more vertical parts lc and one or more intermediate struts Id.

The top part is a round pipe, shown in a horizontal position in the figures, at which the loader grapple 4 of the timber or general cargo crane grabs to the grappling frame 1, whereby the drill can be moved to a desired location with the loader grapple 4 and held in a desired position during drilling. The loader grapple 4 serves as a so-called drilling support.

The figures show that a drilling frame 2 has been attached to the bottom part lb of the vertical part lc with a sliding bearing flange 6.

A prior art drill bit 3 has been attached to the drilling frame 2, below it, the drill bit 3 being rotated by a known hydraulic rotator 3a. The drilling frame 2 is invented herein, as it is not necessary in current known equipment connectable to tracked excavators.

The loader grapple 4 shown in the figures is known in the prior art, the loader grapple 4 usually comprising two opposing grapple arms 4a, opened and closed with one or more hydraulic cylinders.

The sliding frame 5 shown in the figures is also invented herein. In the figures, the sliding frame 5 consist of two column guideways 5a surrounded by compression springs 5b. The compressions springs 5 prevent the drill bit 3 from jumping. The column guideways 5a slide into the vertical parts lc of the grappling frame 1 guided by known sliding bearings 6 (flanged sliding bearings are shown in the figures), whereby the drill bit 3 is allowed to move downwards. The bottom end 5c of the sliding frame 5 comprises a drilling support 5d. The column guideways 5a of the sliding frame 5 are attached using a known method, e.g. with threads or by welding to the top surface 5da of the drilling support 5d. The drilling support 5d comprises a hole (presented in the middle in the figures) for the drill bit 3, whereby the drill bit is allowed to move down past the drilling support 5d. In the figures, underneath the sliding frame 5d, there are rotation preventers 7, these rotation preventers 7 have also been herein invented. The rotation preventers 7 are pressed into the base, holding the drilling frame 2 still, whereby only the drill bit 3 rotates. Another new invention is a rotation preventer 8 shown in the figures consisting of a bridle chain, a chain, a cable or a corresponding known structure. In the figures, there is a lifting eye equipped with a quick-release lock at the end of the chain, this bridle chain being secured to a desired location, e.g. to the crane boom, and locked with the lifting eye to prevent rotation of the drill. To prevent rotation, for example upright timber can be used for attaching the rotation preventer 8 to a nearby fixed location, whereby the drill is also prevented from rotating. Particularly on snowy ground, a chain attachment is a reliable way of locking the drill to keep it from rotating, in the figures, the chain has been attached with a known shackle to the top part la of the grappling frame 1, but the attachment site can be different from that shown in the figures. The rotation preventer(s) 7 is/are necessary during drilling, because the loader grapples 4 are equipped with a rotator, and due to the above-mentioned, the loader grapple 4 would start to rotate on the rotator during drilling.

The figures also show locking means 9 that have been invented herein, particularly figure 5 shows a transverse locking means 9, which is a pin locked in place by a known clip.

The figures show a drill for use in drilling a hole/recess in the ground, a road surface or a planted area, the drill also being used for making holes/ recesses for anti-tank mines.

The figures show that a loader grapple 4 of a timber or a general cargo crane is used to grab onto one or more grappling frames 1 of the drill, whereby the drill can be moved to a desired location using the loader grapple 4 and held in a desired position during drilling, and further press the drill bit 3a of the drill apparatus 3 downwards, whereby the drill bit 3a rotated by the rotating apparatus 3b is pressed into the ground, road surface or planted area, whereby a hole or recess is formed in the ground, road surface or planted area.

According to an inventive structural solution, the top part la of the grappling frame 1 comprises, perpendicular to the drill bit 3a, one or more transverse tubular beams, which tubular beams the opposing grapple arms 4a and 4b of the loader grapple grab onto by closing the opposing grapple arms 4a and 4b of the loader grapple around the top part la of the grappling frame 1.

According to an inventive structural solution, the tubular beam has a round cross- section.

According to an inventive structural solution, the grappling frame 1 comprises at least two vertical parts lc, wherein the bottom parts lb of the vertical parts comprise one or more drilling frames 2, below which a drill bit 3 with a rotating apparatus 3a has been attached.

According to an inventive structural solution, the drill comprises one or more sliding frames 5, attached with one or more column guideways 5a by means of sliding bearings 6 to the bottom part lb of the grappling frame 1, whereby the column guideways 5a are able to lift into the vertical parts lc of the grappling frame 1, allowing the sliding frame 5 to rise upwards.

According to an inventive structural solution, the column guideways 5a of the sliding frame 5 are surrounded by compression springs 5b, preventing the drill bit 3 from shaking and jumping.

According to an inventive structural solution, the sliding frame 5 consists of two column guideways 5a surrounded by compression springs 5b, where the

compression springs 5b prevent the drill bit 3 from jumping, and further, prevent the drill bit 3 from freely descending into the lower position, wherein the column guideways 5a of the sliding frame 5 slide into the vertical parts lc of the grappling frame guided by sliding bearings 6, whereby the drill bit 3 is allowed to move downwards.

According to an inventive structural solution, the bottom end 5c of the sliding frame 5 comprises a drilling support 5d.

According to an inventive structural solution, the bottom end 5c of the sliding frame 5 comprises a drilling support 5d, which drilling support 5d is comprised of a straight metal sheet, the column guideways 5a of the sliding frame 5 being attached with threads or by welding onto the top surface 5da of the drilling support 5d.

According to an inventive structural solution, the drilling support 5d comprises a hole for the drill bit 3, whereby the drill bit 3 is allowed to move down past the drilling support 5d.

According to an inventive structural solution, there are drill rotation preventers 7 underneath the sliding frame 5d. The rotation preventers 7 are pressed into the base to be drilled, whereby the rotation prevents 7 hold the drill still, only allowing the drill bit 3 to rotate.

According to an inventive structural solution, there is a rotation preventer 8, comprised of a bridle chain, a chain, a cable or a corresponding known structure.

According to an inventive structural solution, a locking means (9), the locking means (9) being a transverse pin, locking the drill into the upper position, is a pin locked in place with a clip.

USE OF THE INVENTION

The invented apparatus can be manufactured using known metal structural and hydraulic engineering techniques, using known manufacturing methods, raw materials and components.

It is obvious to a person skilled in the art that the above-described exemplary embodiments are relatively simple in structure and functionality for the purpose of illustrating the description. Following the model presented in this patent application it is possible to manufacture very different structural solutions, utilizing the inventive idea presented in this patent application. The invention is not limited to the above presented options, but various variations are possible within the boundaries of the inventive idea defined by the accompanying claims.