SE1950454A1 - A projectile arresting device and a method for preparing a projectile arresting device - Google Patents

Abstract

The present invention relates to a projectile arresting device (1) comprising a foundation (3) constituting a floor (7), a rear wall (5) and partition walls (9) extending in a direction substantially perpendicular to the rear wall (5). The partition walls comprises a rear edge (10a), adjacent the rear wall (5), and a front edge (1 Ob). Projectile stopping material (11) is arranged between the partition walls (9). A projectile stopping material retaining front layer (13) is disposed between the front edges (10b) of the partition walls and arranged adjacent the projectile stopping material (11). The front layer (13) has a convex shape. The invention also relates to a method for preparing a projectile arresting device.

Description

1 A PROJECTILE ARRESTING DEVICE AND A METHODFOR PREPARING A PROJECTILE ARRESTING DEVICE TECHNICAL FIELD The invention relates to a projectile arresting device. The invention also relates to amethod for preparing a projectile arresting device.

BACKGROUND The invention is advantageously used tor instaiiation on shooting ranges.

Conventionally, there are various brojeotiie arresting eientehts itnovirn in the art providedfor outdoor and indoor shooting ranges. An arresting eiernent tor outdoor use oan be anaturai siooe or oonstitute ot rnasses ot earth exoavated uo to a iongitudinai ridge, Theseoutdoor shooting ranges oan be suooiernented with nrojeotiie arresting ntateriais, suoh asa ooiyrnerio or rubber grahuiar rnateriai, on the bart ot the arresting eiernent exposed to guntire.

Aiso known in the art is a oroieotiie arresting devioe oontprising sioie waiis and oroieotiieStopping rnateriai arranged between the side waiis. Further, the device oorrtorises aresistant waii *with a number ot oioseiy situated hoiiow sections. The hoiioiiv sections areoreterabiy rnade ot a ooiynfrerio materiai or a reintorced boiynterio rnateriai, but rriay inorinoiroie be rnaoie ot any rigid materiai that withstands the ioad irorn stoobing materiai andwhioh oan be behetrated by oroieotiie.

Other advanced oroieotiie arresting eienients oornbrises a trarne ot waiis surrounding aiayer oi granuiar rnateriai, tvith a tront rubber iaver. EP0683375 At disoioses anabsorption broieotiie arresting eienteht ot the type whioh is insertabie within a container.The surtaoe of the oroieotiie arresting eiernent taoing shooters is oonstituted ot a rubbercover. Granuiar rnateriai is arranged behind said cover, ivieans for resisting the pressureot the granuiar rnateriai is arranged between the granuiar rnateriai and the cover. Theserneans inoiude vertioai eientehts ot hardened steei or rubber. Aiternativeiy, the resistancemeans oontorises a oiuraiity of biooks tfiritieh are made ot oiastio ntateriai and have a veryhigh duotiiity. The biooits rnay aiso be rrranutaotured by the use ot pressad and giuedeiastontierio granuiar ntateriai. A iayer that aiiows the passage ot the northdetorntted 2 proieetites is provided. Said iayer does not break or perntanentiy deforrn after thepassage ot the proieetiies. The proteettie arresting eiernent described in EPQ683375 isintended for tndoor use oniy. therefore, the structure ie not euitabte for outdoor use. Theheight ot the arresting eiernent is too iow for shooting outdoors due to the ionger firingdistanees outdoors, in generat. A further dtsadvantage of the projeetiie arresting eternentdisoiosed in Eifiiïtoåitfiïš is that the means to resist the pressure of the granutar rnateriatWitt tear and deforrn during penetration.

WOEOt 31 84062 At disoioses an outdoor shooting range having a covering oornprising aneiastorner iayer. A baoirtng iayer is arranged onto an inctined surface of e.g. groundrnateriai vtfhioh has been iaid as a bartit. "the oovertrtg iayer rests upon an änciined surfaceof proieetiiearresting materiai fitied into a vratertight box formed by the baoiring tayer.Since the oovering iayer is arranged upon the inciined surface of the proiectiiearrestittgrnateriai, there is no significant pressure of the proieotiie-arresting rnateriai on the oovering iayer.

Other trnovvn shooting range devices having an eiastonter front tayer rnay break anddetornt during penetration ot the proieotiies, because of rnassive eiastorner rnateriai that ispushed to the side and baeitu/ards by the penetrating proiectite. The etastonrter front tayerrnay aiso tend to adopt a buiging shape after penetration. t-iowever, a probiem over tirne niay be that the front vvatis of eiastorner rrtateriai, poiyrrterrnateriai or a reänforoed poiyrnerie and/or eiastonter rnateriai according to the prior arthave poor strength, and witi be vveakened espeoiaiiy due a non-eiastic deformation (eoid-creeping) of the ntateriai vvhen subteoted to ioad for sonie period of ttrne. As aoonseouenoe, the pressure ot the granuiar rnateriai vviii cause the front vvaii to adopt abutging shape that oontinuousiy buige out or even break after a number of penetrations during some time.

Henoe, there ts a need for an improved proiectiie arresting device and a rnethod forpreparing a projectiie arresting device tfvhton overoorrtes the above disctoseddisadvantages. 3 There is also a desire to improve the durability of the proieotiie arresting eiernente, duringpenetration ot the projeotitee. Doing this may increase the lifetime of the projeotiiearresting eiemeitte.

There is also a desire to find an alternative instead of using material for the projeotiiearresting eiernents that will be vveakerted due a non-eiastio deformation (eoid-oreeping)for a front layer subjected to penetration of the projeotiiee.

A further desire is to eliminate the risk for darnage and deformation of a front iayer duringpenetration of the projeotitee.

SUMMARY An object of the invention is to improve an inventive projeotiie arresting device and amethod for preparing a projeotite arresting devioe *vvhere the previoueiy rnentioneoiprobteme are avoided. Another object of the invention is to improve the overall quality ofprojeotiie arresting eiemente provided for construction of outdoor and indoor shootingrangee. A further object is to to improve that the front iayer wiit not break and deforntduring penetration of the projeotiies. Yet a further object is to improve iiietirne of a frontlayer of projeetiie arresting eternente that will not be weakened due a non~eiaetiodeformation (ooitzfcreeping) when subjected to penetration of the projeotitee.

The objects are achieved by a projeotite arresting devioe according to claim 1. Thus, theinvention also provides a projectiie arresting device for oomprieing: A foundationoonetituting a ftoor, a rear wati, and partition waite extenoiirtg in a direction etibstantiatiyperpendiotiiar to the rear wait. The partition Waits oornprisee a rear edge, adjaoent the rearwait, and a front edge. A projectiie stopping rnateriai is arranged between the partitionwaite. A projeotiie stopping rnateriai retaining front iayer ie dispoeed between the frontedges of the partition Waits and arranged adjaoent the projeotiie stopping materiai. Thefront tayer hae a convex shape.

Since the front layer is provided with a curved convex shape when projectile stoppingmaterial is loaded between the partition walls in the projectile arresting device, the frontlayer is subjected to more tensile strength than pressure force. The risk that the front iayermay buige, break and deforrn during penetration of the projeetiies is decreased 4 significantly. The advantage is that the lifetime of the front layer and the proiectiiearresting deviee is increased.

According to a further aspect, the invention also provides that the front layer is elastic andhas a convex shape in a loaded condition of the proiectiie stopping rriateriai. Since thefront layer is elastic it can adopt a non-curved shape when projectile stopping material isnot loaded between the partition walls in the projectile arresting device, while it adapt itsnatural shape convex shape when the projectile stopping material is loaded betvveen thepartition walls.

According to another aspect of the invention, the front layer is made of an elastic materialhaving a high tensile strength. By providing a front layer material having a high tensilestrength, the risk that the front iayer may buige, break and deforrrt during perietration oftne proiectiies is decreased significantly. The advantage is that the lifetime of the frontlayer and the preieetiie arresting devioe is increased.

According to yet another aspect of the invention the front layer is made of an elastomerwith reinforced material adapted to resist tensile forces. By providing a front layer made ofelastomer with reinforced material, the risk that the front iayer may beige, break anddeforrn during penetration of the proieetiies is decreased significantly. The advantage isthat the lifetime of the front layer and the proieetiie arresting device is increased.

According to a further aspect of the invention, the front layer is fixed to the partition wallsby fastening means. The risk that the front layer get loose, due to the pressure on thefront layer from the loaded projectile stopping material, is decreased significantly.

According to yet a further aspect of the invention the partition walls are made of steelplate stiffened by providing a corrugated shape of the walls. As a result, the partitionwalls is provided with a reinforcement in order to withstand the pressure from the stoppingmaterial against the partition walls, if one or more adjacent sections is/are completely emptied during service, repair and/or maintenance.

According to another aspect of the invention, the front layer may be attached in the upperend of the proiectiie arresting device at the upper edges of the partition vvaiie. in this way,it can be eneureoi tnat the front iayer rnay keep the stopping materiai iri position during serviee, repair and rnaintenahee oi the proiectiie arresting device, when stopping rriateriaiis removed and repiaoed tfvith new stoppirtg rnateriai.

According to yet another aspect of the invention, the front layer is stiff, provided withlimited elasticity, having a convex shape in an unloaded and a loaded condition of thepreieotiie stepping rnateriai. By providing a sdhstahtiaiiy pernranent convex shape oi thefront iayer, the iniiuenoe oi pressure ioroe en the iront iayer oan he deoreased. The riskthat the ironi iayer may beige, break and deiorm during penetration oi the proieetiies isdecreased significantly. The advantage is that the lifetime of the front layer and theproieetiie arresting device is increased.

According to a further aspect of the invention, the partition walls are made in one singlepiece with the front layer. The manufacturing of the projectile arresting device can be costefficient.

The objects are also reached with a method according to any one of claims. Thus, theobjects are achieved by a method for preparing a projectile arresting device, comprisingthe following steps: providing partition waiis to a foundation, eorrstituting a iioor, and to arear trvaii; arranging the partition Waits to extend in a direction substantiaiiy perpendiouiarto the rear waii, the partition waiis cornprises a rear edge, adjaoent the rear wait, and aironi edge; arranging proieotiie stopping ntateriai between the partition waiis; disposing apreiectiie Stopping rnateriai retainihg ironi iayer between the ironi edges oi the partitionwaiis and arranged adiaoent the proieotiie stopping rnateriai; and providing the iront iayer with a oonxfex shape.

Further advantages and advantageous features of the invention are disclosed in thefollowing description and in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS Below, embodiments of the invention will be described with reference to the drawings, inwhich:- fig. 1A shows a perspective front view of a proieetiie arresting device according to an embodiment of the invention, 6 - fig. 1B shows an enlarged detail D of the projeetiie arresting device according tothe embodiment in fig. 1A, - fig. 2A shows a perspective front view of a projectiie arresting device according toanother embodiment of the invention, - fig. 2B shows an enlarged detail D of the prefectiie arrestirtg device according tothe embodiment in fig. 2A, - fig. 3 shows a perspective front view of a proiectiie erresting device according toyet another embodiment of the invention, - fig. 4 shows a perspective front side view of prejectiie arresting device accordingto a further embodiment of the invention, - fig. 5A shows a perspective rear view of a proiectite erresting device according toyet a further embodiment of the invention, - fig. 5B shows another perspective front view of the prejectiie arresting deviceaccording to the embodiment in fig. 5A, - fig. 6A shows a perspective front view of a projectiie arresting device according toanother embodiment of the invention, - fig. 6B shows a perspective rear view of the projectiie arresting device accordingto the embodiment in fig. 6A, DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION The front side of the proiectite arresting device is defined as the side which is facingtowards the shooter and the rear side ot the projectiie erresting device is defined es theside opposite the front side.

FEGS. 1A show a perspective view of a proiectiie arresting device 'i according to anembodiment of the present invention. The proteetiie arresting device t rnay cornprise afoundation 3 made of e tiooi' ot any rriateriai that noids the pressure frorn the errestingdevice, such es eg. soii, wood, steei or concrete. The foundation 3 may eiso he astandard ground support eietneitt such as prentade steei or concrete support wait unit inL- or "f-shape for greater heights. Tne foundation 3 forms a rear watt 5 and a ffoor 7 of theproieotiie arresting device t. The height ot the proiectiie erresting device t may hebetween dörr: - 10 rn, end preferaoty between t.2 rn ~ 5 m. Partition watis 9 are arrangedto the foundation 3 and extends in the direction towards the shooter. The partition wafis 9are preferahiy rnade of steei which is ioertt in profiie to increase the strength when toaded 7 or unioaded tront grattoies. Sort ot sheet rnetai is chosen depending on the intendedammunition strength and rnay aiso he ot haiiistic steei. The partition waiis 9 cornprise arear edge tOa, which is connected to the toundation 3, and a tront edge tOh. The partitionvvaiis 9 may have a width ot about t50 min - 2500 mm, preterahiy 400 rnrn - tQOO rnrn, theproiectiie arresting device t is aiso provided twith a stopping rnateriai tt, wherein thetunction ot the stoppittg rnateriai is to capture and ahsorh the proiectiies. The stoppingrnateriai tt is preterahiy a poiyrneric or ruhher grantiiar rnateriai, hut other rnateriaiscapahie ot captoring and retaining the proiectiies can aiso he used. The stopping rnateriaitt is arranged between the partitioit waiis 9.

The projectiie arresting device 't turthet' cornprises a tront tayer t3. The tront iayer t3serves to resist the pressure ot the stopping rrtateriai tt tor keeping the stopping rnateriaitt in piace, and to prevent proiectiies penetrating the proiectiie arresting device t trornescaping. The tront iayer t3 is provided ioetvtfeen the partition waiis 9. The proiectiiearresting device t may further cornprises attachment means provided at the partition vitaiis9 tor tixatioit ot the tront iayer t3 to the partition waiis 9. The tront iayer tíš is arranged tothe tront edges ttth ot the partition waiis. The rear waii 5, the partition waiis 9 and thetront iayer tS serves to keep the stopping materiai tt in piace during service, repair andmaintenance ot the proiectiie arresting device t, viihen stopping rnateriai tt is removedand repiaced with new stopping rnateriai tt.

The tront iayer t3 has a oonvex shape as iiiustrated in tig. tA. The convex shape ot thetront tayer t3 may he provided during ttzvo aiternative conditions. According to onecondition, the tront iayer t3 is provided with a signiticant eiasticity and the tront iayer tíš iscapahie to he curved to the convex shape hy the pressure against the tront iayer t3 whenthe stopping rnateriai tt is ioaded in the projectiie arresting device t. Stretching ot thetront iayer tB rnay he tirnited hy a woven tihre reintoroetnertt tvhioh is suitahiy seiectedtrorn a sparseiy woven tihre iaver ot nature or synthetic tihre. Fibre direction shouidprimariiy he chosen so that traction torces hetween the attachments in the partition waiisare tai-ten up. According to one enthodirnent, the tiores are oniy arranged in the putiingdirection and verticai tihres exist oniy in order to keep the tihres in their position whenmanutacturing the iayer.

According to another condition, the tront iayer t3 is provided with a iimited eiasticity andkeep a constant convex shape with iittte or none variation ot its convex shape, when the 8 projectiie arresting device 1 is ioaded or untoaded with stopping ntateriai 11. A reinforcedctoth can he attached to the front surface of the front tayer 13. By providing the front Eayer13 with a iimited eiasticity and keep a oonstant convex shape, the front iayer 13 wiii nothang down due to gravšty and the pressure trorn the stopping ntateriai 11. The front layer13 may be made of a stiff elastomer or reinforced material while it still can be made thinwith a convex shape keeping the stopping material in position and having the advantagethat only tensile strength occurs in the front layer. The partition walls 9 can suitably bemade in one single piece with the front layer, with essentially the same or correspondinglimited elasticity and material as the front layer 13. in tig. 1A, the proiectite arresting device 1 is iittrstrated tiiied virith the stopping materiai 11providing a pressure P against the front iayer 13. The ioad hy the pressure P ot thestopping rnateriat 11 against the front iaver 13 wiit in generai provide tensiie forces F inthe front iayer 13. The tensiie torces F in the tront iayer 13 tviit rnainiy be spreadhorizontaiiy i-t in the tront tayer 13. With reference to the above described two aiternativeconditions to provide the convex shape ot the front iayer 13, the front layer 13 may in bothconditions be made of an elastic material having a high tensile strength. The front layer 13may be made of an elastomer, such as polyuretan (PUR), with reinforced materialadapted to resist tensile forces. Suitably, the front layer 13 may be reinforced withsynthetic fibres, carbon fibres and/or aramid fibres. Preferably, the front layer 13 may bereinforced by a synthetic fibre cloth. More preferably, the front layer 13 is made of PURthat may be provided with reinforced material.

Fig. 1B shows an enlarged detail D of the proiectite arresting device 1 according to theembodiment in fig. 1A. Fastening rneans tor attaching ot front Eayer 13 to partition vvaiis 9can he rnade ot steet or eiastorneric rrtateriai. The curved tront taver may he rnotinted withfasteners at such a distance that the hent iaver is retained by friction and eiarnping torceand does not siide out ioetvreen the attachments. tvtore particutariy, the elastic front layer13 may be fixed to the partition walls by fastening means such as a mechanicalattachment, preferably at the front edge iüh of the partition tvatis 9. The front layer 13may be attached nteehanicaity at each side of the partition tvatis 9 at severai positionsaiong the height of the proiectiie arresting device t. The front iayer may ioe arrangedtowards the surface ot the partition wait 9 and fastening devices 4, ntade of steei oreiastomer support eiernents, and can he arranged on both sides ot the partition waii andotiiied together hy screw connections, with the front tayers 13 between them. Behind the 9 attachment, on the inside of the partition tvaiis 9, the end edge 13e of the front layer 13may be further secured. lf the front layer 13 is made of an elastomer, for instance made ofan elastomer, a piece of the elastomer can be attached by gluing at the end edge of thefront layer 13 in order to ensure that the end edge of the front layer 13 is prevented due totensile forces in the layer from sliding out of the attachment at any position along theheight of the proiectiie arresting device 1.

The projectiie arresting device 1 may comprise of a second convex iayer with preferabiythe same eiasticity, dimension and onrvature as the convex front iayer 13 describedabove. Aiternativeiy, the second convex iayer may be made of a rnateriai that is iessdtirabie bot more eiastic than the front iayer 13. The second convex iayer have no ioadcarrying capacity. The second convex iayer can preferabiy be arranged on the front sideof the first convex front iayer 13. The advantage with arranging the iess durabie secondconvex iayer at the tront side of the tront iayer 13 is that damages and hoies frompenetrated projectiies can easiiy be repaired frem the front side. The partition vifaiis mayeornprise of at ieast two sheets that are attached by fasting means. The first and secondconvex iayers can be attached in the partition waiis between said at ieast two sheets.

Fig. 2A shows a perspective front view of a projectiie arresting device according toanother embodiment of the invention. Fig. 2B shows an enlarged detail D of the prciectiiearresting device according to the embodiment in fig. 2A. The same reference numeralsare used for the corresponding features as shown and described with reference to figs.1A-B. As shown in figs. 2A-B, the front layer 13 may be attached in the upper end of theprojectiie arresting device at the upper edges of the partition waits 9. in this way, it can beertsured that the front iayer 13 is not hanging down during retiiiing the proieotiie arrestingdevice 1 vvith the stopping materiai 1 1 in piaoe during service, repair and maintenance ofthe proiectiie arresting device 1, when stopping materiai 11 is removed and repiaeed withnew stoppietg materiai 11. A rigid sheet 15, such as a steei piate for instance. may bearranged on top of the proiectiie arresting device arranged adiacent the front tayer. Thesheet may be arranged betvveen the partition waiis 9 and attached to the partition waiis byattachment means 1"/'. The sheet aiso ensures that the partition vvaiis 9 are hoid in piacevrithoot the risk of cotiapsing, irorn the pressure of the stopping materiai 'i 1.

Fig. 3 shows a perspective front view of a proiectiie arresting device according to yet another embodiment of the invention. The same reference numerals are used for the corresponding features as shown and described with reference to figs. 1A-B and 2A-B. Asshown in the embodiment in Fig. 3, and described above with reference to Fig. 1A-B, thepartition waiis 9 are preterabiy made of steei which is bent in profiie to increase thestrength when ioaded from stopping rriateriai f t, such as granufes. The partition walls 9may be made of steel plate stiffened by bent in profile, providing e.g. a corrugated shapeof the walls. A bent profile, such as corrugated shaped walls, have the advantage to havea high durability for the partition wall 9.

Fig. 4 shows a perspective front side view of broiectiie arresting device according to afurther embodiment of the invention. The same reference numerals are used for thecorresponding features as shown and described with reference to figs. 1A-B, 2A-B and 3.According to the embodiment, a surface iayer få may be arranged in front of the frontiayer 13 for target broieotions. The partition waiis 9 have been extended with an extensioniivafi 9a in front of the front iayer 13 and a surface iayer can be arranged to the outermostedges tub of the partition vvaiis 9. The surface iayer may for instance be a thin sheetmade of PUR used as surface for target projections. in the space S between the frontiayer 13 and the surface iayer 19 for target proiections, stobping rnateriaf ti that maycome out via projectiie penetration hoies in the front iayer 13, oan be ooiieoted in thespace S.

Another embodiment (not shown) is to arrange a surface iayer such as a sheet ofeiastomer oioth, paper or paperboard in front of the front iayer t3, preferabiy hangirig froma raii at a ceiiing above, if indoors, or preferabfy arranged to hang from a framework or thesintiiar, if outdoors, in front of the front iayer t3. An arrangement for mechanicaiiychanging the surface iayer that has been subieoted to proiectiie tioies can be provided, bytransporting away the used iayer and bringing another new surface iayer iorwarded by a raii, roiis, trainee/ork, or the simiiar.

Fig. 5A shows a perspective rear view of a proiectiie arresting device 1 according to yet afurther embodiment of the invention. Fig. 5B shows another perspective rear view of theproieotiie arresting device according to the embodiment in fig. 5A. The same referencenumerals are used for the corresponding features as shown and described with referenceto figs. 1A-B, 2A-B, 3 and 4. The front layer 13 of the projectiie arresting detfice may beprovided with at ieast one opening 22. A sieeve 24, having fianges 24a, Elib and open ateach end, is attached to the back side i3b of the front layer 13 at the tianges around the 11 at ieast one opening 22. Qne purpose of the at teast one opening 22 in the front fayer t3,provided *with a sieeve 24, is to provide a specific designated area of the front iayer 13that is suhjected for the most concentrated firing, a so caiied “hot~spot". The sieeve 24can he provided with a detachahie vvaii portion 25 such as an expanded eiastorneriontateriai to hoid hack the Stopping rnateriat at service, repair and maintenance. A inajoramount ot the tired projectiies can he shot *without changing the front iayer 13 and insteadchange a very srnaii part of the front iayert 3. The front side ot the sieeve at the ttange24k), tacing the front tayer 13, can he covered with an easy interchangeable part of an etastomeric rnateriai.

This construction attovvs the highty ooneentrated tiring that causes great wear can heeasiiy repaired hy reptacing the eiastomer materiai in the sieeve 24, such as a. round piate26 rnade of eiastorner, preterahiy rnade of poiyurethane.

An opening 22 in the front iayer vvith a steeve 24 can aiso he designed vvith a hatch 27, inorder to get easy access into the steeve 24 tor empty the projectiies coitected inside thesteeve 24 or tor fitiing the sieeve or fiifing and/or ernptying of proiectife stoppihg rnateriaitf the space inside the projeotiie arresting device t. "the hatches 2? can be made ofetastomeric and penetrahie. The hatehes 27 may have a front of etastomer that fotiovvsthe curvature ot the front iayei" 13 to not he detected.

The steeve 24 is preterahiy arranged behind the front layer 13 and hetvveen the rear tßvatiand the partition vvaiis 9. The steeve24 is suitahie attached hy giuing on the hack side ofthe front layer 13. The front layer 13 may be provided with a reinforced portion 28 at theback side of the front layer 13 around the area where the sleeve 24 is attached. Thereinforced portion 28 is attached to the back side of the front layer 13 such that the sleeve24 follows the elastic movement of the front layer. The reinforced portion 28 is suitably asheet of elastomer that is penetrable. The sheet of elastomer can be attached to the frontlayer 13 by gluing and suitably to the partition walls with fastening means withoutrestricting the movement of the sheet together with the front layer 13. lf attachment of thesheet to the partition walls is not suitable, the sheet can be attached to the front layer 13with fastening means and/or by gluing.

The sheet of elastomer may be provided with a wedge shape and attached into the frontlayer 13 and to fit the sleeve 24 which is provided with the corresponding wedge shape. 12 Thanks to the wedge form, the sheet and the stopping material, such as an expandedeiastomerio rriateriai in the sieeve 24, oan be easiiy exohanged trom the tront iayer t3 atthe tront side ot the proiectiie arresting device 1. This ie advantageous since the part otthe front iayer 13 that is euhjeoted to vvear due to ooneentrated tiring, een he eaeiiyexehariged trorn the tront iayer t3, white the other parte ot the tront iayer t3 that havebeen eubieoted to minor or insigriitioant amount ot tiring is iees intttierioed to vrear and thus need netto he exohanged. lf it is not possible to fill stopping material from the top of the proieotiie arresting device 1due to the roof or ceiling height, for instance if the proteotiie arreeting device 1 is arrangedindoore, the filling can be done at the front layer 13 through an upper sleeve 24. Thesleeve 24 may be attached and arranged to the front layer 13 as described above.However, it may still not be possible to fully fill the entire space at the top of the proieotiiearresting device t. Theretore, a eteei piate pan he arranged in an inoiined position in thetop ot the proieotiie arreetietg devioe t in the epaoe at the top, behind the front iayer 13.The steei piate may further he provided with a tiange ot steei at the tower end to steer theproiectiie downwards inte the stopping materiai tt, extended at an angie to the eteei piateand in vertioai direction inside the proieotiie arreeting device t. 'the steei piate and thetiange oan be attaoited by vreiding. "the steei piate and the tiarige may he provided ae onesheet ot steei where the tiange ie herit to the desired ahgie reiative the upper part ot thesheet. The eteei piate vvith the angied tiange are eooperating to guide proieetiiee, enteringat the top, into the stopping materiai tt beiovv the tiange at the top. The dimension ot theeteei piate and the angied tiarige can he ohoeen depending on the ammunition used atthe shooting range. The eteei piate and the tiange are not penetrahte and are preterahiymade ot a ballistic steei piate.

With reference to the embodiments shown and described above with reference to figs.1A-B, 2A-B, 3, 4 and 5A-B, it is suitable to provide a bottom plate which holds the layerand which is extended past the layer so that a collecting channel is formed.

The collecting channel can be formed with a straight edge so that the front layer 13 ofelastomeric material can be attached hanging behind this edge so that the stoppingmaterial 11 can be collected between the straight edge and the edge following theattachment of the curved front layer 13. The distance between the layers may varydepending on the selected attachment of the front layer 13. 13 Furthermore, an inclined non-penetrable steel plate may also be arranged at the bottomportion of the proiectite arresting device i, in such a way that it guides the stoppingmateriai ii to an opening for disoharge ot stopping rnateriai ii and reduce the amount ofStopping rnateriai it.

The upper part and the lower part of the proiectiie arresting device i can pe provided instihstantiaiiy eiastorner rnateriai. A possibie discharge avaiiaoiiity at the bottom tower partof the proiectiie arresting device may faciiitate soppiy of a fire inhioiting agent, protectedfrorn rain, snovv and the arresting device rnay aiso he eeaied from air that may feed a fire.

Fig. 6A shows a perspective front view of a proiectiie arreeting device 1 according toanother embodiment of the invention. Fig. 6B shows a perspective rear view of theproiectiie arresting device according to the embodiment in fig. 6A. The same referencenumerals are used for the corresponding features as shown and described with referenceto figs. 1A-B, 2A-B, 3, 4 and 5. The proiectiie arresting device i shovrn in fig. iàA-B can beprovided with a stift seif~siipporting front iayer i3, attached at the back side edges with aLehaped steei profiie 3G that can be secured by fastening means to a vvaii or a hacking ofmetai or wood. A stahiiizing partition vvaii 9 made of eg. eiastoiner metal or woodbetween the sections has the task of keeping the shape of the part that shouid pe straight.The partition walls 9 can suitably be made in one single piece with the front layer 13, withessentially the same or corresponding limited elasticity and material as the front layer. 13in the roof at the top and at the bottom, the front iayer i3 can he seoured in a piate ofpoiyrner vtfith a ciamping joint. Opening for fiiiittg Stopping rnateriai ii can be done in thetop part. lf this is possible due to the roof height, the openings can be made with cloth ofelastomer as front. For this proiectiie arresting device i, a stiffer elastomer or two layerscan be used, where the exterior is highly elastic layer and the inner can be a rigid layer,but not so rigid that it bursts when passing through projectiles.

The projectiie arresting device may cornprise a root provided by a rigid sheet i5 proiectingfrom the rear vvaii 5 and which covers an area in front of the proiectiie arresting device i.The rooi may pe a one piece integrai part of the foundation 3, as a unit oonstittiting thefioor 7, rear vtfaii 5 and the roof, for instance aii made of concrete. A prcieoting roofprotects targets from rain and snovv. Attachments for rnechanicai targets can be arrangedheiovv said projecting roof. 14 As described above, existing vraiis, iioors and ceiiings rnay be used tor motinting theproiectiie arresting device t or proiectiie arresting arrangernent indoors. Existing waiis andfioors then acts iiite the foundation tor the proiectiie arresting device t or proieotiiearresting arrangernent. in another embodiment, however, the projeotiie arresting device tntay be a rriovabie rnodtiiar unit oorriprising a foundation constittiting a fioor T, a rear vvaii5 and a roof. in doing so, it is possibie to protfide a proieotiie arresting arrangernentcornprising at ieast two projectiie arresting devices t, where at ieast two proiectiiearresting devices are grouped together, thereby torrnihg inter aiia an i-shape, L-shape, U~shape, C-shape, Fïshape, T-shape or E-shape.

The projectiie arresting device 'i rnay he provided with a rnoistore barrier iayer' ofpoiyrneric rrrateriai. This iayer prevehts water ironi the soii to be absorbed by the stoppihgrrrateriai i t. The ntoistiire barrier iayer aiso prevents rainwater that has entered theproieotiie arresting rnodtiie t frorn ieaiting into the ground. This prevents univarited ieadand other oontaminants frorh proiectiies or stopping materiai trorn being ieached by vraterand spread in an uncohtroiied rnanner in the surrounding environment. The iayer isappiied on the foundation 3, and can aiso cover a tower part of an inner side ot the rearwaii 5. The foundation 3 can also be from soil and also use concrete slabs in differentheights to get a slope of the layer to the perforated drainage pipe. Fiain water ntay becoiiected in a. perforated drainage pipe disposed in the iower part of the proiectiiearresting device i. The drainage pipa rnay he provided with a ooupiing cotipied to the nextntoduie or with a sieeve ooupiirtg (rtot shovvn) arranged in the iayer. Another soiid pipe.ieading to a coiieotion vessei or tiiter, rnay he cotrpied to sieeve coopiing (not shown).

According to a further embodiment, the projectile arresting device 1 may be provided assemi-circular units. The front layer 13 is provided with a iintited eiastioity and keep aoonstant oonvex serrii-oirooiar shape with iittie or none variation oi its convex shape, whenthe proieotiie arresting device 'i is ioaded or tinioaded vrith stopping materiai “i i. Twosemi-circular units can be arranged with their rear back sides against each other in orderto form a complete circular projectile arresting device. As a result, a circular projectilearresting device can be provided that can be subjected to shooting at any position aroundthe projectile arresting device 1.

Further, a method for preparing a projectile arresting device as shown and describedabove with reference to figs. 1A-B, 2A-B, 3, 4, 5A-B and 6A-B, may comprise the following steps: providing partition waiis 9 to a foundation, 3 eenstitnting a tieer ï, and to a rear wait5; arranging the partitien Waits 9 to extend in a direction substantiaiiy perpendicuiar to therear wait 5, the partition waiis comprises a rear edge tüa., adjaceiit the rear wait 5, and afront edge ifib; arranging prejectiie stopping materia! ti between the partitian iitfaiis 9;dispesing a projectiie Stopping rnateriai ti retaining ironi iayer 13 between the trent edges“iüb oi the partitien *Waits and arranged adiaceitt the prejeetite stopping rnateriai 'i t, and providing the ironi iayer 13 with a convex shape.

It is to be understood that the present invention is not limited to the embodimentsdescribed above and illustrated in the drawings; rather, the skilied person will recognizethat many changes and modifications may be made within the scope of the appended claims.

Claims (10)

1. 6

2. CLA|I\/IS

3. Prejeciile arresiihg device (i) cerrrprieihg: - a ieundatieri (3) censiittrting a fleer (7), - a rear tvaii (5), - partition vvaiis (9) extending in a directien euiaetantiaiiy eerperidicniar ie therear vvaii (5), the partition tvaiis cerrrprieee a rear edge (i (Ja), adiacent the rearwait (ä), and e (rent edge (teh), - preieetiie eteppirtg rnateriai (i i) arranged between the partition vifeiie (9), - preieetiie eteppirtg rnateriai retaining frent iayer (i 3) diepesed between thefrcnt edges (i Gb) of the partition Waits and arranged adiacent ine prejectiieetopeing maieriai (i i ), - characterized in that the frent iayer (i 3) has a convex shape.

4. Prejectile arreetirtg device (i) accerding te cieirn i , wherein the front layer (13) iselastic and has a convex shape in a loaded condition of the preiectiie eteppihgmateriai (ii).

5. Preiectiie erreeting device (i) according te ciaim i er 2, wherein the front layer(13) is made of an elastic material having a high tensile strength.

6. Prejeciile arresiihg device (i) according ie any ef the preceedirrg ciaints, whereinthe front layer (13) is made of an elastomer with reinforced material adapted toresist tensile forces.

7. Prejectiie arreeting device (i) aceerding te any ef the preceedirtg ciairrts, whereinthe front layer (13) is connected to the partition walls by fastening means.

8. Preiectite arresting device (i) according te any ei the preceeding ciaime, whereinthe partition walls (9) are made of steel plate stiffened by providing a corrugatedshape of the walls.

9. Preieetiie arresting device (i) accerding te arty ef the preceedirig ciairne, whereinthe front layer (13) is attached in the upper end of the prejectiie arresting device atthe upper edges et the partition vraiis (9).

10. 17 Prejectiie arresting device (_ t) according te any ct the prcceeding ciaints, whereinthe front layer (13) is stiff, provided with limited elasticity, having a convex shape inan unloaded and a Ioaded condition of the preiectiie stepping materiat (t t). Prejectite arresting device (t) according te ciaim 8, wherein the partition walls (9)are made in one single piece with the front layer (13). A method for preparing a projectile arresting device, comprising the following steps: - providing partition vvaiis (9) te a tcurtdatian, (3) certstitutirig a ticer (7), and to arear vtfait (5), - arranging the partition vvatis (9) te extehd in a directien euhstantiaityperpendicuiar te the rear wait (5), the partition vvaits cemprieee a rear edge(t (Ja), adiacertt the rear wait (5), and a trortt edge (t Gb), - arrangihg prejectite stapping rnateriat ( t t) between the partiticn vifatia (9), - dispcsing a praiectite etopping ntateriai retairtihg trent iayer (tíš) hetta/een thetrcnt edges (t täta) et the partition Waits and arrariged adiaceht the prcjectiiestcppiitg materiai (t t), and - providing the trent tayer (t 3) vtfittt a convex shape.