JP2019168193A - machine gun - Google Patents

Abstract

To provide a machine gun which handles a plurality of bullets with different diameter.SOLUTION: A machine gun 10 of the present invention comprises: a receiver 12; a barrel part 14 fixed to the receiver 12 and designated just for a predetermined diameter; a bolt cover 16 fixed to the receiver 12 and designated just for the predetermined diameter; and an actuating part having a bolt part designated just for the predetermined diameter and a reciprocating mechanism of the bolt part which reciprocates the bolt part for shooting a bullet with the predetermined diameter, the actuating part being fixed to the receiver 12. Both the receiver 12 and the reciprocating mechanism of the bolt part have compatibility with a plurality of bullets with different diameter including the predetermined diameter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machine gun.

  Conventionally, there are a plurality of types of small guns such as machine guns, such as 5.56 mm and 7.62 mm, but the diameter of ammunition that can be fired by a single gun is predetermined. In other words, machine guns are designed specifically for a kind of caliber, and ammunition of another caliber cannot be fired by that machine gun.

JP 2010-96475 A

  In the operation of machine guns, it may be required to shoot with ammunition with different calibers. In that case, the shooter needs to replace the machine gun. That is, when shooting an ammunition with a certain caliber, a machine gun corresponding to the caliber must be used, and when shooting an ammunition with another caliber, another machine gun corresponding to the other caliber must be used. Often, the structure and component configuration of machine guns are completely different, so the shooter has to learn a number of operating methods and maintenance procedures, and the burden is high. In addition, the number of parts increases and the management effort also increases.

  One exemplary object of one aspect of the present invention is to provide a machine gun that accommodates multiple caliber ammunition.

  According to an aspect of the present invention, a machine gun includes a tail tube portion, a barrel portion dedicated to a predetermined diameter attached to the tail tube portion, and a free bottom cover portion dedicated to the predetermined diameter attached to the tail tube portion. A bottom portion dedicated to the predetermined diameter, and a bottom portion reciprocating mechanism for reciprocating the bottom portion for shooting the ammunition of the predetermined diameter, and an operating portion attached to the tail tube portion, The tail tube part and the free bottom part reciprocating mechanism are compatible with a plurality of apertures including the predetermined aperture.

  Note that any combination of the above-described constituent elements and the constituent elements and expressions of the present invention replaced with each other among methods, apparatuses, systems, and the like are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the machine gun corresponding to multiple caliber ammunition can be provided.

It is the schematic which shows the external appearance of the machine gun which concerns on embodiment. It is the schematic which shows the external appearance of the machine gun which concerns on embodiment. 1 is a schematic exploded view of a machine gun according to an embodiment. It is a schematic exploded view of the action | operation part of the machine gun which concerns on embodiment. Fig.5 (a) is a schematic partial enlarged view which shows the discharge port of the tail tube part which concerns on embodiment, FIG.5 (b) is a schematic part which shows the discharge port of the tail tube part which concerns on a comparative example. It is an enlarged view. Fig.6 (a) is a schematic side view which shows the action | operation part which concerns on embodiment, FIG.6 (b) is a schematic side view which shows the action | operation part concerning a comparative example.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the description and drawings, the same or equivalent components, members, and processes are denoted by the same reference numerals, and redundant descriptions are omitted as appropriate. The scales and shapes of the respective parts shown in the drawings are set for convenience in order to facilitate explanation, and are not limitedly interpreted unless otherwise specified. The embodiments are illustrative and do not limit the scope of the present invention. All features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  1 and 2 are schematic views showing the appearance of a machine gun according to an embodiment. FIG. 1 shows a surface that is on the left side for the shooter when the shooter operates, and FIG. 2 shows an opposite side, that is, a surface that is on the right side for the shooter. FIG. 3 is a schematic exploded view of the machine gun according to the embodiment, and FIG. 4 is a schematic exploded view of an operation unit of the machine gun according to the embodiment.

  The machine gun 10 shown in the figure is a machine gun classified as a light machine gun. As its basic components, a tail tube portion 12, a barrel portion 14, a bottom cover portion 16, a trigger portion 18, and a stock portion 20 are provided. A bipod 22 and an actuating portion 24. The actuating unit 24 includes a bottom part 26 and a bottom part reciprocating mechanism 28. The bottom part reciprocating mechanism 28 is configured to reciprocate the bottom part 26 for shooting ammunition, and includes a rocking bottom part 28a, a piston part 28b, and a reverse seat spring shaft part 28c. The bottom part reciprocating mechanism 28 can be said to be a part of the operating part 24 excluding the bottom part 26.

  As will be described in detail later, the tail tube portion 12 and the free bottom portion reciprocating mechanism 28 are compatible with a plurality of apertures. The plurality of apertures are, for example, two different apertures, and may be 5.56 mm and 7.62 mm as an example. Moreover, the trigger part 18, the stock part 20, and the two leg parts 22 may also be compatible with a plurality of apertures. The barrel portion 14, the bottom cover portion 16, and the bottom portion 26 are designed exclusively for a predetermined diameter (either 5.56mm or 7.62mm as an example) among a plurality of diameters.

  The tail tube portion 12 is a basic element of the machine gun 10 that holds other components of the machine gun 10. The tail tube portion 12 includes a barrel portion 14, a bottom cover portion 16, a trigger portion 18, and a stock base portion 20. The bipod 22 and the operating part 24 are attached. The operating part 24 is built in the tail tube part 12. The transition piece 12 also serves to guide the reciprocating motion of the operating portion 24 along the longitudinal direction of the machine gun 10 (left and right direction in FIGS. 1 and 2). Moreover, the tail cylinder part 12 has a bullet outlet 30 for discharging the cartridge case.

  The bottom cover 16 is disposed above the bottom 26 as a cover that covers the bottom 26. The bottom cover 16 also functions as a bullet feeding part. The free bottom portion 26 has a rear end portion supported by the rocking bottom portion 28a, and the rocking bottom portion 28a is supported by the piston portion 28b. A shaft extending into the reverse seat spring of the reverse seat spring shaft portion 28c is fixed to the tail tube portion 12, and a reverse seat spring of the reverse seat spring shaft portion 28c is mounted between this shaft and the piston portion 28b. Yes. The free bottom portion 26, the rocking bottom portion 28a, and the piston portion 28b can reciprocate in the longitudinal direction of the machine gun 10 with respect to the tail tube portion 12 by the action of the combustion gas pressure generated during shooting and the elastic force of the back seat spring.

  In the shooting process of the machine gun 10, the trigger of the trigger part 18 is first pulled by a shooter. The operating portion 24 held by the trigger portion 18 is released. The actuating portion 24 moves forward by the restoring force of the return seat spring 28c that has been compressed. At this time, the tail tube portion 12 receives the ammunition to be fired immediately after it from the bottom cover portion 16, and the ammunition is loaded into the barrel portion 14. The firing needle 32 in the operating part 24 that moves forward strikes the detonator at the rear of the ammunition, whereby the gunpowder inside the ammunition begins to burn. The gas pressure generated as the gunpowder burns injects the warhead at the tip of the ammunition toward the muzzle of the barrel portion 14. Thus, a bullet is fired from the machine gun 10.

  The explosive combustion gas passes through the gas leak hole in the side surface of the barrel part 14, passes through the inside of the tail cylinder part 12, and acts on the operating part 24 (specifically, the piston part 28b). The piston portion 28b receives a force from the combustion gas and the operating portion 24 moves backward. At this time, the ammunition (that is, the cartridge case) that has finished shooting is extracted from the barrel portion 14 by the free bottom portion 26. The cartridge case is discharged to the outside from the discharge port 30 in the middle of the retreat of the operating unit 24. The operating portion 24 compresses the return seat spring of the return seat spring shaft portion 28c while further retracting.

  The retracted operating portion 24 starts to move forward again by the restoring force of the compressed return spring. In this way, the next shooting process begins. While the trigger 18 is being triggered, the machine gun 10 continuously fires bullets.

  Regarding the basic structure of the machine gun 10 and the operation of the shooting process, various known ones can be adopted, and therefore further detailed description is omitted in this document.

  In conventional machine guns, the main component parts of the machine gun, such as the barrel part, the bottom cover part, the actuating part, the trigger part, and the tail tube part, are designed exclusively for each caliber, so there are multiple different calibers. All of their dedicated components must be replaced in order to fire their ammunition.

  However, in the machine gun 10 according to the embodiment, the tail tube portion 12 and the free bottom portion reciprocating mechanism 28 are compatible with a plurality of calibers. In addition, the trigger portion 18, the stock portion 20, and the two leg portions 22 are also compatible with a plurality of apertures. These components are compatible with both first caliber ammunition and second caliber ammunition.

  For shooting the ammunition of the first caliber, the barrel part 14, the bottom cover 16 and the bottom part 26 for the first caliber are used. For shooting a second caliber ammunition different from the first caliber, the second caliber barrel 14, the bottom cover 16 and the bottom 26 are used. For this purpose, the tail tube portion 12 is configured to be replaceable with the barrel portion 14 and the bottom cover portion 16 for the first caliber and the barrel portion 14 and the bottom portion cover portion 16 for the second caliber. Yes. The free-bottom reciprocating mechanism 28 (for example, the rocking bottom 28a) is configured so that the free-bottom portion 26 for the first diameter and the free-bottom portion 26 for the second diameter can be exchanged and attached.

  Since the tail tube portion 12 and the free-bottom reciprocating mechanism 28 are shared by a plurality of calibers, the trigger portion 18 that is attached to these and operates in conjunction with these also adopts a design common to the calibers. It becomes easy. Similarly, since the transition piece portion 12 is shared by a plurality of calibers, it is easy to adopt a design common to the caliber portion 20 and the two leg portions 22 attached to the transition piece portion 12.

  Fig.5 (a) is a schematic partial enlarged view which shows the discharge port 30 of the tail tube part 12 which concerns on embodiment, FIG.5 (b) is the discharge port 130 of the tail tube part 112 which concerns on a comparative example. FIG. To help understanding, the bullet holes (30, 130) are hatched.

  As shown in FIG. 5A, the tail cylinder 12 has a bullet outlet 30 that can discharge a cartridge case with a plurality of calibers. The discharge port 30 has a size and a shape capable of discharging, for example, a cartridge case with two different calibers. Therefore, the discharge port 30 functions as a discharge port common to the cartridge case of the first caliber and the case member of the second caliber larger than the first caliber. Through the discharge port 30, the first caliber cartridge can be normally discharged when the first caliber ammunition is shot, and the second caliber cartridge can be discharged normally when the second caliber ammunition is shot.

  As an example, as shown in the figure, the discharge port 30 is formed in the tail tube portion 12 as an elongated trapezoidal opening along the longitudinal direction of the machine gun 10. Two parallel sides (30a, 30b) of the trapezoidal opening extend substantially parallel to the longitudinal direction of the machine gun 10, and the lower side 30b of these two sides is longer than the upper side 30a. Of another set of two sides connecting two parallel sides, one side located rearward in the longitudinal direction of the machine gun 10 extends up and down so as to be substantially orthogonal to the two parallel sides and connects these two sides. . The other side located forward in the longitudinal direction extends obliquely downward from the front end of the upper side 30a of the two parallel sides to the front end of the lower side 30b.

  The long lower side 30b of the discharge port 30 is longer than the lengths of the first caliber case and the second caliber case. The height of the discharge port 30, that is, the distance between the upper side 30a and the lower side 30b is longer than the widths of the first caliber case and the second caliber case. The short upper side 30a of the discharge port 30 may be longer than the length of the first caliber case and shorter than the length of the second caliber case. Alternatively, the short upper side 30a of the discharge port 30 may also be longer than the lengths of the first caliber case and the second caliber case. In this manner, the bullet outlet 30 may be formed so as to fit the different types of shells with different calibers.

  The fact that the lower side 30b of the discharge port 30 is longer than the upper side 30a is useful for both the discharge performance and the strength maintenance of the tail tube portion 12. The cartridge case is usually discharged from below the discharge port 30. Therefore, as compared with the case where the upper side 30a is extended, the lower side 30b is lengthened according to the second caliber case, so that the second caliber case can be discharged more smoothly. Further, since the discharge port 30 is a hole formed in the tail tube portion 12, the structural strength of the tail tube portion 12 increases as the size thereof decreases. Compared to the case where the discharge port 30 is rectangular and the upper and lower sides have the same length, the discharge port 30 can be made narrower by making the upper side 30a of the discharge port 30 shorter than the lower side 30b. The strength of the portion 12 is improved.

  In addition, the dimension and shape of the bullet outlet 30 are not limited to the specific dimension and shape shown in figure. For example, of the two sides connecting the upper side 30a and the lower side 30b, the front side extends up and down so as to be substantially orthogonal to the upper side 30a and the lower side 30b to connect these two sides, and the rear side is from the rear end of the upper side 30a. You may extend diagonally to the rear end of the lower side 30b. Alternatively, both the front side and the rear side may be inclined. As another example of the shape of the discharge port 30, the discharge port 30 has an elongated rectangular shape along the longitudinal direction of the machine gun 10, and the length of the discharge port 30 in the longitudinal direction is the second. It may be longer than the length of the shell of the caliber. The bullet outlet 30 may have an arbitrary size and shape in addition to enabling discharge of a cartridge case having a plurality of calibers.

  On the other hand, the discharge port 130 of the tail tube part 112 according to the comparative example shown in FIG. 5 (b) is formed in a size and shape according to the case of the first caliber. The discharge port 30 has an elongated rectangular shape along the longitudinal direction of the machine gun 10. The length of the discharge port 30 in the longitudinal direction is longer than the case of the first caliber, but shorter than the case of the second caliber (larger than the first caliber as described above). Therefore, the cartridge with the second caliber cannot pass through the bullet outlet 130. In this way, in the conventional machine gun, the size and shape of the discharge port 130 are designed for each caliber, so when trying to shoot ammunition with different calibers, the cartridge case is not discharged normally, I can't continue.

  FIG. 6A is a schematic side view showing the operating unit 24 according to the embodiment, and FIG. 6B is a schematic side view showing the operating unit 124 according to the comparative example. In order to facilitate understanding, the bottom portion (26, 126) is shown separately from the bottom portion reciprocating mechanism (28, 128) in each figure.

  In general, the firing needle 32 is a member that strikes an ammunition detonator and ignites the gunpowder, and therefore requires a dedicated design that matches the caliber of the ammunition. In the present embodiment, as shown in FIG. 6A, the free bottom portion 26 has a firing needle 32. That is, the free bottom reciprocating mechanism 28 such as the rocking bottom 28 a does not have the firing pin 32. As described above, the free bottom portion reciprocating mechanism 28 includes the rocking bottom portion 28a, the piston portion 28b, and the return seat spring shaft portion 28c. In this manner, the bottom portion 26 incorporates the firing needle 32, so that the bottom portion reciprocating mechanism 28 can be easily designed as a common part with a plurality of apertures.

  On the other hand, in the operation part 124 according to the comparative example shown in FIG. 6B, the firing needle 132 is fixed to the rocking bottom part 128 a of the free bottom part reciprocating mechanism 128. Therefore, in order to fire ammunition with a different caliber, it is necessary to replace the rocking bottom portion 128a with one for the caliber, or to remove and replace the firing needle 132 from the rocking bottom portion 128a.

  As described above, according to the machine gun 10 according to the embodiment, unlike conventional machine guns, it is necessary to replace all or most of the components for shooting a plurality of different caliber ammunition. do not do. Many components, that is, the tail cylinder part 12, the trigger part 18, the gunstock part 20, the two leg parts 22, and the free bottom part reciprocating mechanism 28 can be commonly used for a plurality of calibers. By rearranging the barrel portion 14, the bottom cover portion 16, and the bottom portion 26, it is possible to fire ammunition with a plurality of calibers with one machine gun 10. In this way, it is possible to provide the machine gun 10 corresponding to a plurality of caliber ammunition. Since there are only a few parts dedicated to each caliber, the burden required for the shooter to learn, such as operating methods and maintenance procedures, is reduced, and parts management becomes easier.

  In the above, this invention was demonstrated based on the Example. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiment, and various design changes are possible, various modifications are possible, and such modifications are within the scope of the present invention. By the way.

  In one embodiment, the tail tube portion 12 and the free-bottom reciprocating mechanism 28 are compatible with a plurality of calibers, and at least one of the trigger portion 18, the base portion 20, and the two leg portions 22 has a plurality of calibers. It may be compatible. Even in this case, compared to the conventional case, the number of parts dedicated to each caliber is reduced, the burden required for the shooter to learn such as operation methods and maintenance procedures is reduced, and parts management is facilitated. Alternatively, in an embodiment, at least one of the transition piece 12, the trigger 18, the stock 20, the two legs 22, and the bottom bottom reciprocating mechanism 28 may be compatible with a plurality of apertures.

  In the above-described embodiment, the interchangeable parts of the machine gun 10 such as the tail tube portion 12 are compatible with two different calibers, and the barrel portion 14 designed specifically for each of the two calibers. Although the replacement parts of the machine gun 10 can be replaced with interchangeable parts and can be mounted, the present invention is not limited to this. In one embodiment, the interchangeable parts of the machine gun 10 are compatible with three or more different calibers, and replacement parts designed exclusively for each caliber can be replaced with compatible parts and attached. May be.

  DESCRIPTION OF SYMBOLS 10 machine gun, 12 tail cylinder part, 14 barrel part, 16 free bottom cover part, 18 trigger part, 24 action part, 26 free bottom part, 28 bottom bottom part reciprocation mechanism, 30 discharge port, 32 firing needle

Claims (4)

The tail tube,
A barrel part dedicated to a predetermined aperture attached to the tail tube part,
A free bottom cover part dedicated to the predetermined diameter attached to the tail tube part,
A bottom portion dedicated to the predetermined diameter, and a bottom portion reciprocating mechanism for reciprocating the bottom portion for shooting the ammunition of the predetermined diameter, and an operating portion attached to the tail tube portion,
2. The machine gun according to claim 1, wherein the tail tube portion and the free bottom portion reciprocating mechanism are compatible with a plurality of apertures including the predetermined aperture.   2. The machine gun according to claim 1, wherein the tail tube portion has a discharge port that allows discharge of the cartridges having the plurality of calibers.   The machine gun according to claim 1, wherein the free-bottom portion has a firing pin.   The machine gun according to any one of claims 1 to 3, further comprising a trigger portion that is compatible with the plurality of calibers and is attached to the tail tube portion.