EA034810B1 - Crossbow - Google Patents

Abstract

The invention relates to the field of sports and hunting weapons, namely, to crossbows. The technical result of using the invention is a higher rate of shooting, ease of handling, reduced size, cost, higher shot efficiency, simplified design and better reliability of the weapon. The technical result is achieved due to the fact that the removable bow of the crossbow contains a rigid frame with fixed blocks and guide rods. Rods are capable of sliding and have bushings with blocks installed. Bushings are spring-loaded with coil springs. Fixed and movable blocks are connected by a bowstring so that tackles are formed. The crossbow foregrip has additional guides shaped as rails or grooves along which the carriage resting on rolling bearings moves. The front upper part of the carriage is fitted with two hooks for the bowstring. Hooks may also feature rolling bearings. To cock the crossbow, the carriage is pulled back using cocking devices of known designs. The crossbow has a trigger device with a hook for the bowstring arranged as a rolling bearing and a safeguard device. The sight has a mechanical connection with the shooter's finger to enter range adjustments in operational mode.

Description

The invention relates to the field of sports and hunting weapons, namely to crossbows.

The crossbar is a complex product, incorporating several devices and devices. These include a body with a trigger, a bow, a forend with a guide chute, above which a magazine with arrows can be located. There is also a cocking device that serves to tension the bowstring. In addition, a safety device and an aiming device may be included. For a better understanding of the material presented, it is necessary to familiarize yourself with the descriptions of our patents, which are selected as analogues.

A typical crossbow of modern production is known (Lesnikov V., Our crossbow is ARLET, J. Magnum, No. 6, 1999, pp. 14-17). The article gives general views of several modifications of crossbows, sketches of their components and explains how to handle them. The crossbow contains a wooden box with a butt, a guiding device with a clamping spring for the arrow and a bow with plate shoulders. The cocking mechanism is represented by a stirrup in the front. Depicts a section of the trigger with a fuse. Optical or diopter sights are mounted on crossbows. The crossbow is transported disassembled in a bulk case - bow, bowstring and stirrup separately from the box. To build a crossbow requires considerable time and the availability of tools. Cocking is carried out due to the muscular strength of the shooter, who must put his foot in the stirrup for this, bend down, grasp the bowstring on both sides and cock the crossbow, which is automatically put on the fuse. It is necessary to pull the bowstring evenly so that there are no distortions that can lead to an inaccurate shot or even to drop the boom from the guiding device. Then the shooter inserts the feathered arrow into the guiding device and moves it back until it touches the bowstring, while the arrow is pressed by the spring. After that, the shooter intercepts the crossbow, is applied to the bed, removes from the fuse, takes aim and fires a shot.

All these manipulations take a lot of time, which leads to low combat (practical) rate of fire. The crossbow is very bulky, to a large extent due to the butt and the large dimensions of the bow. When fired, the bow produces a large return due to the fact that the shoulders of the bow move forward, and its body, respectively, back. The shoulders of a modern crossbow are expensive and difficult to manufacture, require the use of high technology and scarce materials. The bow has no straighteners, in the final phase of the shot the residual energy falls on the bowstring, therefore, as a rule, when the shot is idle (without an arrow), it bursts. When fired, such a bow is subject to harmful vibrations. Due to material fatigue, the shoulders may break, which can even lead to injury to the shooter. The trigger device is too complicated and has a lot of trigger pull. Feathered arrow has excessive stability in flight and a large gas-dynamic resistance. The crossbow layout with a wooden stock and butt has poor balance due to the fact that the center of mass of the device is relatively far from the shooter's body.

Known crossbow with lever cocking (Zotov Yu., King of crossbows, w. Weapon, No. 8, 2009, p. 28-31). The crossbow is equipped with a simple bow with titanium arches, a fuse for the index finger, a Kevlar bowstring and an optical sight. Its total length is 75.5 cm; arc length 80 cm; bowstring stroke 19 cm, weight 3 kg. To store and carry the disassembled crossbow, a voluminous case is used. The lever system is located under the fore-end. The order of cocking is as follows: it is necessary to turn the crossbow with the forearm toward you, put the butt on the ground, with one hand rest against the bow arc closer to the middle, with the other hand pull the lever towards you until it clicks, and then return the lever to its original position. After this, it is necessary to insert the arrow, pressing it with a spring, apply, turn off the fuse and fire.

The disadvantage of this device is its large size. The cocking system, although it reduces the cocking force, but increases the complexity and weight of the structure and, accordingly, reduces reliability. Manipulation with a lever device takes a lot of time, which leads to a low practical rate of fire.

Known crossbow with double blocks (A. Aleskovsky, Black Python, w. Weapon, No. 2, 2005, p. 59-62). The crossbow has a spring-type block bow with a double-pulley system. This allowed to significantly increase the course of the bowstring, at the same time reduce the width of the crossbow and slightly reduce the return. However, using such a bow significantly increases the length of the crossbow. Dimensions of onions also remain significant, the system is subject to harmful vibrations. The return on the shot is significant.

Known crossbow trigger device (patent of the Republic of Kazakhstan No. 6310, class F41B 5/00, MG Girfanov; A. Shakirov, 1998). The invention allows to significantly (several times) reduce the trigger effort without complicating the design, provides automatic fixation of the bowstring under tension and remote firing using the trigger cord. The nut hook can be made in the form of a rolling bearing, which leads to automatic equalization of the forces of both shoulders of the bow.

In the description of the invention, all possible manufacturing options for the launching device, in particular the upper lock variant, are not fully described.

Known trigger device of small arms (patent RK No. 8080, class F41B 5/00, Shakirov A.L., 1998). The trigger device is compact, low trigger force, the ability to carry out remote firing from any direction.

The description of the invention does not indicate the possibility of manufacturing an upper lock with a fixing console.

Block bow is known (patent of the Republic of Kazakhstan No. 9166, class F41A 17/00, F41A 17/22, A. Shakirov, 1998). The device comprises a pair of rigid shoulders with chain hoists fixed to them and elastic elements in the form of coil springs. The invention improves the efficiency, compactness of the bow and ease of use, reduce weight and eliminate spurious vibrations after a shot.

The disadvantages of this device can be attributed to the variant with cylindrical tension springs, the fact that they are too heavy, prone to stretching and harmful vibrations. A design variant with cylindrical compression springs and guide tubes is bulky, has a large weight and a tendency to jam.

Known accelerator reloading small arms (patent RK No. 5358, CL F41B 5/18, MG Girfanov, AL Shakirov, 1996). The reloading accelerator of small arms comprises a traction with a hook on the front end and a traction guide, a return elastic member, a fastening carabiner and a shoulder suspension. The use of the device allows to increase the rate of fire of weapons and to provide greater ease of handling. In particular, if mounted on a crossbow, this device increases the rate of fire by ten times.

In the description of the mechanism, not all possible options for the manufacture of rods are given, for example, a rod of the U-shaped profile, in the cavity of which a return elastic element can be located.

Known sighting of small arms (patent of the Republic of Kazakhstan No. 7231, class F41B 5/00, F 41 G 1/00, MG Girfanov; A. Shakirov, A. 1998). The invention improves firing efficiency. The sighting device includes a sight with a correction mechanism and a bar with a scale mounted in the field of view of the shooter. The control element of the amendment mechanism is made in the form of a handle, which is controlled by the hand of an arrow not in contact with the trigger. The sighting device is equipped with a locking mechanism, including a gear sector with a stopper and a latch, as well as a level for leveling the weapon, located in the field of view of the shooter. The disadvantages of this device include the lack of ergonomics of the locking mechanism and retainer. Also, the possibility of introducing range corrections with a hand in contact with the trigger is not indicated.

Patent of the Republic of Kazakhstan. Shop crossbow and an arrow to it were selected as a prototype (patent of the Republic of Kazakhstan No. 6799, class F41B 5/00, F42B 6/02, MG Girfanov; A. L. Shakirov, 1997). The crossbow store is located above the guide groove on the crossbow and is a long narrow box with front, rear and two side walls with two vertical stops located inside for the front ends of the arrows. At the top of the store there is an arrow feeder in the form of a lever spring with a rocker spring-loaded with external springs. There is a spring-loaded top cover of the magazine, which can play the role of a latch. The design indicates a trigger device. The arrow includes a cylindrical body and a tip, the front of which can be made in the form of a point or a container with special equipment.

The disadvantage of this store with external tension springs of the feed lever is the possibility of damage to these springs during operation. The design of the crossbow does not indicate a cocking device.

The objective of the invention is the creation of a crossbar with increased practical rate of fire.

The technical result from the use of the invention is to increase the rate of fire, ease of handling, reduce dimensions, cost, increase the efficiency of the shot, simplify the design and increase its reliability.

The technical result is achieved by the fact that the removable bow of the crossbow contains a rigid frame with fixed blocks and guide rods. On the rods with the possibility of sliding installed bushings with blocks. The bushings are spring-loaded with coil springs. Fixed and movable blocks are connected by a bowstring so that tackles are formed. The forearm of the self-gun additionally contains guides in the form of rails or grooves along which the carriage moves on the rolling bearings. The front upper part of the carriage is equipped with two hooks for a bowstring. Hooks may include rolling bearings. Cocking a crossbar is carried out by moving the carriage using cocking devices of known designs. The crossbar has a trigger device with a hook for a bowstring in the form of a rolling bearing and a safety device. The sight has a mechanical connection with the finger arrow for the operational introduction of range corrections.

An increase in the rate of fire and ease of handling is provided by reducing the number of operations by using a cocking device such as a goat leg or another with automatic feeding of the next arrow to the guide chute.

Improving the convenience of handling is also provided by the use of the sight, which provides the ability to quickly introduce range corrections with the hand holding the gun.

The reduction in size, cost and increase the efficiency of the shot are provided using block onions with coil compression springs. Such a bow has significantly smaller dimensions than 2 034 810 you in comparison with traditionally used bows with expensive flat springs. The reduction in size during transportation is also achieved by the possibility of incomplete disassembly and the absence of a butt.

Simplification of the design and increase of reliability is provided by the design of the trigger device, containing only two moving parts and the presence of a safety device.

List of figures

In FIG. 1 - view of the left side;

in FIG. 2 - front view of a self-propelled gun;

in FIG. 3 - top view of a crossbar;

in FIG. 4 - rear view of the self-propelled gun;

in FIG. 5 is a view of a cocking device such as a goat leg;

in FIG. 6 - types of arrows used;

in FIG. 7 is a rear view of the forend with guides in the form of rails with carriage elements and with forearm manufacturing options;

in FIG. 8 is a variant of a carriage with 8 bearings;

in FIG. 9 is a variant of a carriage with 8 bearings and hooks for a bowstring in the form of rolling bearings; in FIG. 10 is a rear view of the forend with guides in the form of grooves and with carriage elements;

in FIG. 11 is a variant of a carriage with 4 bearings;

in FIG. 12 is a view of a self-shoot with the left wall removed;

in FIG. 13 - onion design;

in FIG. 14 is a diagram of a bow installation on a block;

in FIG. 15 is a diagram of a core feeder;

in FIG. 16 is a diagram of a lever feeder;

in FIG. 17 is a diagram of the sight;

in FIG. 18 is a view of a self-propelled gun in a variant with a recharge accelerator;

in FIG. 19 is a view of a self-shoot in the cocking start phase;

in FIG. 20 is a view of a self-propelled gun in the phase of the start of cocking with the wall removed;

in FIG. 21 is a view of a self-gun in the mid-cocking phase with the wall removed;

in FIG. 22 is a view of a self-gun in the phase of the end of cocking with the wall removed;

in FIG. 23 is a view of a bow in a taut state;

in FIG. 24 is a top view of a crossbow with a bow tied;

in FIG. 25 is a view of a crossbar with a rod feed and a removed wall;

in FIG. 26 is a view of a crossbar with a lever feeder and a removed wall;

in FIG. 27 is a diagram of the sight in operation;

in FIG. 28 is a view of a self-propelled gun with a recharge accelerator in operation.

The crossbar is structured as follows: In FIG. Figures 1–4 show the types of the crossbar from the left, front, top, and rear sides, respectively, with the designation of the main nodes. Here 1 is a fore-end, on both sides of which guides 2 are mounted, on which a carriage 3 is mounted with the possibility of moving along them on rolling bearings along the entire length of the fore-end 1. Over the fore-end 1, the housing 4 is fixed rigidly in the form of a flat vertical box, the front part of which is a store for placing arrows, the tips of which 5 are visible in front, and in the rear of the hull separated by a partition there are launching and safety devices. The store has a removable cover 6 in the upper part, which is fastened with four fungi 7. The safety device and part of the trigger device are located inside the cavity of the handle 8. The trigger 9 has a hole for attaching the trigger cord. On the front of the forend 1 is a block 10, on which a removable bow 11 is attached. The sight 12 is located on the left side of the housing 4.

In the lower part of the gunshot there is a goat-type cocking device (Figs. 1-5). Here, the front hinge 13 is fixed on the block 10, the crank 14 with the handle 15 has the middle hinge 16. The connecting rod 17 of the U-shaped front part is pivotally attached to the middle hinge 16. The rear hinges 18 of the connecting rod 17 are symmetrically fixed on both sides of the rear lower part of the carriage 3.

The following types of arrows charged to the magazine are used in this self-gun: FIG. 6a-6g. The arrow 19 is its main type and consists of a tube 20, a shaft 21 and a tip 5. The tip 5 has a wood carving at the back of which it is screwed into the shaft. The front of the tip can be made in the form of a flat skeletal blade (Fig. 6b), in the form of a harpoon blade (Fig. 6c) (when used for spearfishing), a container with special means (for example, with tear gas) (Fig. 6d). All types of arrows have a neck for placing it in the slot of the store - this prevents the movement of the arrow. This shape of the arrow provides good stabilization in flight, since the center of gravity divides it in a ratio of about 1/3.

In FIG. 7 shows a rear view of the forend 1 with the elements of the carriage 3 and with the options for manufacturing the forearm. The forend 1 with rails 2 in the form of rails has a guide chute 22 for arrows in the upper part. The carriage 3 (Fig. 7, 8) contains paired side plates 23 with hooks 24 for the bowstring. Eight rolling bearings 25 are fixed inside the plates with screws and studs 26 with the possibility of rotation of 3,034,810. Studs can be made as solid with a thickened middle part, or simple with an additional spacer sleeve. The shanks 27 of the rear studs serve as the axes of the hinges 18 (Fig. 1, 5). The forend 1 can be made compound (Fig. 7a), recruited from metal profiles fastened with a rivet or screw connection. In the case of mass production, a profile (Fig. 7b) of a strong but lightweight titanium alloy can be used. As an option (Fig. 9), the hooks for the bowstring 24 may be rolling bearings - this ensures free running of the bowstring along the hooks when cocking, which is necessary to equalize the forces from the sides of the bow.

An alternative form of the forearm 1 and carriage 3 is shown in FIG. 10 and 11. In this case, the guides have the form of grooves 28 for rolling bearings 25 along them. Bearings 25 are mounted on a plate 29 on vertical studs, the shanks of two front studs can be used as hooks 24. Rolling bearings can also be mounted on these shanks. The axis 30 is fixed motionless on both sides of the plate 29 and also serve as the axis of the hinges 18 (Fig. 1, 5).

In FIG. 12 is a view of a crossbar with the left wall of the store and the body removed. Of the new elements here: nut 31 - the main element of the trigger device, which serves to hold the bowstring and its descent. The nut is fixed on both walls of the housing on the axis 32 and is spring-loaded with a spring 33 to lift its front part relative to the forearm. In the front lower part of the nut, a rolling bearing 34 is fixed for rotation to hold the bowstring. Alternatively, instead of the bearing 34, a nut hook in the form of a protrusion with lapped edges can be used, made to hold the bowstring and lower it without damage. Walnut 31 also contains a fixing console 35 and a cocking console 36, the latter passing through a longitudinal through groove of the forearm 1. The partition 37 serves to separate the store cavity from the body cavity. The trigger lever 38 is mounted on both walls of the housing on the axis 39 and is spring-loaded with a spring 40. On the front shoulder of the trigger lever there is a trigger 9 with a hole. A sear is located on the rear shoulder of the trigger lever to hold the latching console 35.

A crossbar may include a safety device. Here, the safety lever 41 is fixed on the axis 42 and is spring-loaded with a spring 43. A sear is located on the upper shoulder of the safety lever to hold the rear shoulder of the trigger lever. The lower shoulder of the safety lever is a key 44, made with the possibility of pressing on it with the inner side of the palm.

The bow (Fig. 13) is attached to the front of the forend. It consists of a rigid frame of onion 45, the central part of which is a platform 46 for insertion into the block 10 (Fig. 1). Four fixed blocks 47 are installed on the onion frame 45. They are of different diameters and are mounted at different heights. Small fixed blocks are installed close to the plane of the frame, large - on high axes. The rods 48 are also fixedly mounted on the frame, and their internal fastening elements serve as guides for the block 10. The cylindrical compression springs 49 are worn on the rods 48. The rods 48 are also fitted with sleeves 50 that slide freely on them. On the bushings 50, the movable blocks 51 are oppositely mounted on the axes in pairs. All the blocks are made on rolling bearings. As a bowstring 52, a steel cable with a diameter of 1.5-2 mm can be used. The bowstring 52 is attached at one end to the mount 53, and at the other end to the other same mount. The fastening is a screw, close to the head of which a hole is made, i.e. they are completely identical to the bicycle cable mounts. The fasteners are made with the possibility of free extension of the cable with its subsequent fixation. This is done to increase the durability of the bowstring, which experiences maximum wear at the point of contact with the trigger and boom. For this purpose, the bowstring can have a slightly longer length so that the free ends of the bowstring are twisted into coves and attached to the bow frame (Fig. 4). The bowstring is threaded through a system of movable and fixed blocks in such a way that tackles are formed.

In FIG. 14 shows a diagram of the installation of a bow with platform 46 on a crossbow using block 10. Here 1 is a forend with a guide channel in the upper part. The bow is held by friction and does not require additional fasteners.

The store can be supplemented with a rod feeder (Fig. 15). Here, the feeder housing 54 is fixed to the cover. The feed bar 55 with the feed spring 56 put on it passes through the opening of the feed housing of the feeder 56. The rod is connected to the rocker 58 through the hinge 57. This option is simple, but significantly increases the size of the self-shooter. A more compact version of the lever feed is shown in FIG. 16. Here, the rocker arm 58 is set in motion by the known system of levers 59 with hinges 60. The upper end of the lever through the hinge 61 is connected to the tube 62. Inside the tube there is a slider 63 with a hinge 64 fixed to it. A longitudinal slotted groove is provided in the tube for passing the hinge 64. The slider is spring loaded relative to the tube by a tension spring 65.

Sight 12 is mounted on the left side of the crossbar (Fig. 17). All elements of the sight can be mounted on the frame of the sight, which, in turn, is attached to the body of the gun (the frame of the sight is not indicated). The crank of the sight 66 is mounted on the frame of the sight using the hinge of the sight 67 with the possibility of swinging on it and is spring-loaded to lower down with a pin spring (spring

- 4 034810 is not indicated). The screw for setting the range of direct shot 68 limits the lowering of the crank of the sight 66 down. The Picatinny rail 69 is mounted on the crank, on which the optical sight 70 is mounted. The connecting rod of the sight 71 is connected to the free end of the sight crank 66 by the hinge of the sight 72, and the upper part is connected to the front arm of the sight sight lever 74 through the hinge of the sight 73. The lever of the sight 74 is mounted on the frame of the sight through the hinge of the sight lever 75. The rear shoulder of the lever of the sight 76 is made with the possibility of periodic contact with the thumb of the right hand arrow. The range bar 77 is fixedly mounted relative to the frame of the sight and is curved in a circle sector with a center lying on the hinge of the sight 67. The range bar on the outside can have guides for a flexible interchangeable strip with the range values printed on it. The arrow 78 (in the form of a point in the plan) is fixedly mounted on the crank of the sight 66. Under the arrow 78, a bubble level can be fixed for leveling (the level is not indicated). Instead of a Picatinny rail, a Weaver rail or dovetail mounts can be used. Instead of an optical sight, you can use any other attachments, such as a collimator sight, a laser rangefinder, a laser target designator, etc.

In FIG. Figure 18 shows a self-shooter with a cocking device of a different type, a recharge accelerator. Here, the rod 79 is rigidly mounted on the carriage and has a fastening carabiner 80 on the right end. The cable 81 is fixed to the belt loop 82 with the possibility of adjusting the length of the release. The belt loop is adapted to be worn on the shoulder bend of the shooter and, to avoid slipping, may have another loop worn on another shoulder bend and connected to the first loop-harness. The auxiliary handle 84 is rigidly mounted on the block by means of the console 85. On the right side of the crossbar there is a return elastic element (not shown) in the form of a rubber band, with the front end secured to the front of the block, and the rear end to the back of the carriage, working to return to the front position.

The use of other known cocking devices, for example, polyspast, electric or pneumatic drives, etc., is also possible. Cocking devices can be quick-detachable with the possibility of replacing them with cocking devices of other types.

Above, only the simplest design of the crossbar is described. Improvements of a non-fundamental nature can be made to it, improving its properties, but complicating the design. These may include reinforced jacks of hinge axles; a strip of wear-resistant material at the point of contact with the bowstring; the presence of a protective cover of the store on the arrowheads; the presence of a rigidly spring-loaded cam on the carriage for the cocking console of the nut. Also, in the design of the bow, instead of cylindrical compression springs, gas springs can be used, the springs of the trigger mechanism or sight can have stiffness adjustments. Appearance - painting, camouflage, decoration, etc. - remain at the discretion of the manufacturer. Although the proposed design is designed for right-handed people, a special option can be made for left-handed people - for this, the sight should be moved to the right side.

A crossbow is handled as follows: it is transported in a disassembled condition, packed in a standard case of a diplomat type, with a bowstring removed from the hooks. To do this, remove the bow from the block (Fig. 14) and lay parallel to the body below the sight. The bowstring in this case is somewhat stretched, and its working part is located in the gap between the guide groove and the bottom edge of the store.

If necessary, the self-shooter is removed and inserted onion into the block (Fig. 14). After that, feed the carriage forward and put on the bowstring on the left and right hooks of the carriage. After that, remove the cover of the store, feeding it forward and up. Arrows are placed in the store and closed with a lid, dropping it down on the fungi and feeding back all the way. The crossbow is ready for cocking (Fig. 19, 20).

After that, take the handle 8 with your right hand (Fig. 1), and use the handle 15 with your left hand, and pull it with an effort on yourself. In this case, the bowstring is fond of carriage hooks. In the case when the hooks are made in the form of rolling bearings, the bowstring has the ability to run around them, automatically leveling the forces from the side of the bow arms.

The central part of the bowstring slides along the gap formed by the guide groove and the lower edges of the walls of the store, slipping under a packet of arrows (Fig. 21).

After the bowstring has passed the back of the lower arrow, the latter rests on the guide trough under the weight of the overlying arrows. Then the bowstring passes the nut rolling bearing, the carriage presses with a pin 26 (Fig. 9) on the end of the cocking console 36, creating a moment of force that deflects the front of the nut 31 down (Fig. 12). In this case, the locking console 35 engages with the sear of the trigger lever 38, which rotates on the axis 39 under the action of the spring 40. At the same time, the fuse is turned on, the sear 41 of which engages with the end face of the arm 38 after turning on the axis 42 under the action of the spring 43.

After that, the handle 15 is fed forward, the bowstring rests on the rolling bearing 34, and the carriage goes to its extreme forward position. The Central section of the bowstring while running around the rolling bearing 34, automatically aligning the efforts of both shoulders of the bow. The crossbow is ready to fire (Fig. 22).

If necessary, firing the fuse, turn off the palm by pressing the key 44, overcoming the resistance of the spring 43, while it whispers out of engagement with the torus

- 5 034810 kg of the shoulder 38. After that, pull the trigger 9, the trigger lever rotates on the axis 39, overcoming the resistance of the spring 40, while it releases the locking console 35 in a tentative fashion. Since the nut axis 32 lies above the bowstring plane, in the absence of supporting force side of the fixing bracket, the bowstring cannot be meshed with the nut bearing 34. The bowstring breaks down and makes a working move to the front position, striking the end of the arrow and giving it acceleration. A shot is taking place. After that, if necessary, a cocking-shot cycle is repeated. A user of average physical ability is able to reproduce this cycle at a speed of one shot per second until the pack of arrows is completely exhausted.

In the bow (Fig. 13, 23, 24), when the bowstring is pulled, the bushings with the blocks mounted on them move along the guide rods in different directions, compressing the coil springs. At the same time, the energy necessary for throwing the arrow is accumulated in the springs. After the bowstring is hooked onto the rolling bearing of the nut of the trigger device, the bow remains taut. When a shot is fired, the bowstring is released, the springs straighten, the bowstring returns to its original state.

When shooting from uncomfortable positions (for example, when shooting up), feeders are used to avoid delays. The rod feeder (Fig. 15) is installed instead of the cover in a similar manner (Fig. 25). The feeder provides a more reliable supply of arrows to the guide chute, but limits the number of arrows placed in the store. By the degree of extension of the rod can judge the number of arrows remaining in the store.

The lever feeder (Fig. 16, 25) is placed in the store on top of the package of arrows under the cover.

When shooting from a crossbow at short ranges, use a scope mounted on the direct range of the shot, which is set using screw 68 (Figs. 17, 27). The sighting line can be shifted slightly to the right so that the arrow would fly exactly at the target at the range of the direct shot. When the distance to the target increases while continuing to hold the crossbow, with the thumb of the right hand press (contour arrow) on the rear shoulder of the sight lever 76, which rotates on the hinge of the sight lever 75. This movement is transmitted through the connecting rod 71 to the crank 66, which also rises, overcoming the resistance hairpin springs (spring not marked). Thus, the angle between the line of departure of the boom and the optical axis of the sight associated with the crank 66 is changed. Range corrections are made during the aiming process, while maintaining the self-shoot with two hands, which reduces the gap between the phases of making corrections and shots. The magnitude of the introduced range corrections is determined by the range scale installed on the bar 77. Holding the crossbar with two hands and continuing the aiming process, give it the necessary elevation angle (Fig. 27). Thus, shooting is possible even on a hinged trajectory, which increases the aiming range. At the same time, the crosshairs are horizontal using the level that is in the field of view (the level is not indicated). Slight parallax practically does not affect the effectiveness of shooting and is compensated by aiming errors.

If remote shooting is necessary, the trigger cord is tied to the trigger hole and a force is applied to this cord to fire the shot. To guard the crossbow during hunting, it is attached firmly on the ground in the desired direction, the trigger cord is passed through a separate separate unit. The end of the cord is fixed so that the game during migration can act on it and produce a descent. In this case, the fuse is turned off, for example, by wrapping the handle 8 with tape and pressing the fuse button 44.

When using a cocking device in the form of a reloading accelerator (Figs. 18, 28), hold the self-arrow with the right hand on the handle 8, and the left hand - on the auxiliary handle 84. For firing a shot, the self-arrow attached to the shoulder suspension is pushed away from the body, overcoming the bow resistance. In this case, the carriage 3 goes to its extreme rear position. After that, the crossbow is returned to its original state, pressing it to the body, which also contributes to the rubber harness. With this movement of the carriage in the self-gun, all the above processes occur. With this type of cocking, a rate of fire of 1 shot per second is also provided.

A working model of the self-gun was made, the test results of which proved the efficiency of the proposed scheme. The presence of the claimed positive technical results was also confirmed. Such sports equipment can be successfully used in such a new sport as practical shooting.

Claims (1)

A crossbar containing a bow, a forend with a guide chute, a box magazine with a back and two side walls, with internal stops for placing the neck of the arrow, characterized in that the bow contains a rigid frame with fixed blocks, guide rods on which spring-loaded bushings are mounted with the possibility of sliding with blocks, the fixed and movable blocks being connected by a bowstring to form the chain hoists, and the forend additionally contains rails and a carriage with two side plates rigidly connected ezhdu in a lower portion under the forend, wherein the plate with the inner sides each have four rolling bearing, - 6 034810 mounted in pairs above and below the rails on the axles with the possibility of moving the carriage using known cocking devices, and the front upper part of the carriage is equipped with two hooks for a bowstring that contain rolling bearings mounted on vertical axes.