JP6676560B2 - Bullet for small arms - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a small arms bullet in which the outside of a bullet core is covered with an instep.

  Patent Literature 1 discloses a small arms bullet in which an annular projection formed on an inner peripheral surface of a maximum outer diameter portion of the instep comes into contact with a bullet center.

Japanese Patent No. 5244010 (paragraph [0018], FIG. 1)

  However, in the small arms bullet disclosed in Patent Document 1, the portion of the maximum outer diameter portion of the armor provided with the annular projection cannot be deformed inward, so that when the small arms bullet passes through the barrel. There was a problem that the barrel resistance was increased and the barrel was damaged due to the increased internal pressure.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small arms bullet capable of reducing the resistance received when passing through a barrel.

In order to achieve the above object, a first aspect of the present invention is to provide a small arms bullet having an outer shell covered with an armor composed of two different members arranged in the axial direction. In the above, the bullet is a straight bullet portion extending linearly in the axial direction of the small arms bullet, a tapered head portion extending from the straight bullet portion to the bullet side, A truncated cone shaped tail portion extending from the straight portion to the breech side, and the shell is a cylindrical shaped shell straight portion forming a maximum outer diameter portion of the small arms bullet; It has a tapered shape extending from the instep straight portion to the warhead side, and an instep portion fitted with the bullet center head, and a truncated cone shape extending from the instep straight portion to the warhead side. None, a bowed tail fitted with the bullet center tail, And a constricted portion that is arranged only at an intermediate position of the rib, is narrowed over the entire circumferential direction, and is fitted on the boundary surface between the two bullet center components or on the breech side from the boundary surface, A small arms bullet having an annular gap between the entire straight portion of the shell except the constricted portion and the straight center portion of the bullet.
The invention according to claim 2 is the bullet for small arms according to claim 1, wherein the bullet is such that, of the two bullet configurations, the breech side is longer than the warhead side from the boundary surface.

The invention according to claim 3 is the small arms bullet in which the outside of the bullet center is covered by an armor, wherein the armor constitutes a portion having the largest outer diameter in the small arms bullet; At least one maximum outer diameter cylindrical portion extending in the axial direction of the dexterous bullet is provided, and all the maximum outer diameter cylindrical portions are provided between the bullet and the center of the small arms bullet over the entire area in the axial direction. The bullet has an annular gap, and the bullet has a straight center portion extending linearly in the axial direction of the small arms bullet, a tapered portion extending from the straight center portion to the warhead side and tapering. And a truncated cone shaped tail portion that extends from the straight portion of the center of the bullet to the breech side and is reduced in diameter on the breech side. A straight tubular insulated straight portion extending in the axial direction of the small arms bullet, and extending from the straight portion to the warhead side; And the upper head forming a tapered shape corresponding to the bullet heart head is, and the object to be Kinoeo portion to which the form a truncated cone shape corresponding to the bullet heart tail extends in the bullet caudally from the upper straight portion, The head is fitted with the ballistic head, and the tail is fitted with the tail, so that the armor retains the bullet and the armor The straight portion has an annular gap with the bullet center straight portion over the entirety of the small arms bullet in the axial direction, and all the maximum outer diameter cylinder portions are provided in the instep straight portion. I have.

According to the first aspect of the present invention, the maximum outer diameter cylindrical portion can be deformed toward the center axis of the small arms bullet over the entire axial direction of the small arms bullet. This makes it possible to reduce the resistance that the small arms bullet receives when passing through the gun cavity. In addition, since the trajectory composed of the two trajectory components is held at the three positions of the back cover, the back cover and the constricted portion, it is possible to stabilize the fixation of the trajectory, Is fitted at least with the ballistic structure arranged on the breech side, so that the ballistic structure arranged on the breech side is held by the instep at both ends, so it is more stable Can be achieved.
According to the second aspect of the present invention, of the trajectory constituted by the two trajectory components, the armor holds the trajectory component having a long axial length at two places, thereby stabilizing the fixation of the trajectory. Can be achieved.

According to the third aspect of the invention, all the maximum outer diameter cylindrical portions can be deformed toward the central axis of the small arms bullet over the entire axial direction of the small arms bullet. This makes it possible to reduce the resistance that the small arms bullet receives when passing through the gun cavity. Also, since the instep's head fits with the head of the bullet and the tail of the back fits with the tail of the bullet, the instep's holding the center of gravity allows stabilization of the fixing of the center of gravity. It becomes possible.

Partially broken side view of a small arms bullet according to the first embodiment (A) Cross-sectional view around the head of the instep, (B) Cross-sectional view around the instep of the instep Sectional view showing the process of a small arms bullet passing through the barrel Sectional view showing the process of a small arms bullet passing through the barrel Sectional view showing the manufacturing process for bullets for small arms Partially broken side view of a small arms bullet according to a second embodiment. Sectional view showing the manufacturing process for bullets for small arms Partially broken side view of a small arms bullet according to a third embodiment. Side sectional view of a bullet for small arms according to another embodiment Side sectional view of a bullet for small arms according to another embodiment Side sectional view of a bullet for small arms according to another embodiment Side sectional view of a bullet for small arms according to another embodiment

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a small arms bullet 10 of the present embodiment (hereinafter, simply referred to as a “bullet 10”) has an outer shell 21 covered with a shell 21. The bullet 10A of the bullet 10 is formed in a tapered shape, and the breech 10B of the bullet 10 is formed in a truncated conical shape whose diameter is reduced as the bullet 10A is separated from the bullet 10A. The armor 21 is formed in a container shape with the warhead 10A side closed and the breech 10B side open. Hereinafter, the bullet 10A side of the bullet 10 will be referred to as the "front side" and the breech 10B side as the "rear side" as appropriate.

  The bullet 11 includes a bullet straight portion 12 extending linearly along the center axis J1 of the bullet 10, a bullet head 13 extending from the bullet straight portion 12 to the bullet 10A side, and a bullet straight portion 12 And a bullet tail portion 14 extending from the bullet to the bullet 10B side. Further, the armor 21 includes a straight cylindrical armored straight portion 22 extending along the center axis J1 of the bullet 10, an armored head 23 extending from the armored straight portion 22 to the warhead 10A side, And an instep part 24 extending from the straight part 22 to the breech 10B side.

  The center-of-warhead 13 is formed in a tapered shape in which the diameter is reduced toward the front side (as it moves away from the center-of-the-straight portion 12), and the instep head 23 is formed in a tapered shape corresponding to the center-of-warhead 13. I have. The bullet tail portion 14 is formed in a truncated conical shape whose diameter is reduced toward the rear side (as the distance from the bullet straight portion 12 increases), and the instep tail portion 24 has a truncated cone shape corresponding to the bullet tail portion 14. Is formed. Then, the instep 21 holds the bullet 11 by fitting the instep 23 with the head 13 and the tail 24 with the tail 14.

  In detail, the front end face 13F of the bullet head 13 is flat, while the inner face of the instep head 23 has a pointed tip. The instep head 23 has a front end gap 23S with the front end face 13F of the bullet head 13. Further, the instep tail portion 24 includes a fitting cylindrical wall 24A that fits with the bullet center tail portion 14, and a retaining wall 24B that is addressed to the outer peripheral portion of the rear surface of the bullet center tail portion 14 and prevents the bullet center 11 from coming off. It is configured.

  As shown in FIG. 1, the instep-formed straight portion 22 constitutes a portion of the bullet 10 having the maximum outer diameter. That is, in the bullet 10 of the present embodiment, the entire instep-formed straight portion 22 constitutes the maximum outer diameter cylindrical portion 31 of the present invention.

  The inner diameter of the armored straight portion 22 is larger than the outer diameter of the bullet 11 (specifically, the bullet straight portion 12), and the armored straight portion 22 extends over the entire area of the bullet 10 in the axial direction. An annular gap 32 is provided between the center and the bullet 11.

  As shown in FIGS. 2A and 2B, the axial length of the straight center portion 12 is longer than the axial length of the straight portion 22. Then, as shown in FIG. 2 (A), the rear end (the end on the side of the instep straight portion 22) of the instep head 23 is connected to the bullet 11 (specifically, the bullet straight portion 12). An annular gap 33 is provided between them. As shown in FIG. 2 (B), the front end (the end on the side of the instep straight portion 22) of the instep tail 24 is located between the center of elasticity 11 (specifically, the end of straight center of bullet 12). Has an annular gap 34.

  FIGS. 3 and 4 show the bullet 10 as it passes through the barrel 70. In the examples of FIGS. 3 and 4, the bullet 10 is fitted to the front end tube portion 42 </ b> A of the cartridge case 42 and forms a part of the ammunition 41. A barrel 71 is formed in the barrel 70 to communicate with the cartridge case 42 from the front side. More specifically, the gun cavity 71 includes a guiding portion 72 that communicates with the cartridge case 42 and is reduced in diameter toward the front side, and a straight portion 73 that communicates with the guiding portion 72 from the front side. The inner diameter of the straight portion 73 is slightly smaller than the maximum outer diameter of the bullet 10.

FIG. 3 shows the bullet 10 being fired and the front end of the bullet 10 protruding into the straight portion 73 of the gun cavity 71. Here, if the space between the instep 21 and the center of gravity 11 is clogged at the maximum outer diameter portion of the bullet 10, the diameter of the bullet 10 is less likely to be reduced, and the resistance received when the bullet 10 passes through the barrel 70 is large. Become. As a result, there may be a problem that the internal pressure of the gun cavity 71 increases and the material forming the upper shell 21 easily adheres to the gun cavity 71. However, in the present embodiment, as shown in the change from FIG. 3 to FIG. 4, when the maximum outer diameter tubular portion 31 (the instep straight portion 22) passes through the barrel 70, the maximum outer diameter of the instep 21 Since the annular gap 32 is formed between the cylindrical portion 31 and the bullet 11, the bullet 10 (specifically, the maximum outer diameter cylindrical portion 31 of the instep 21 ) can be deformed inward. Accordingly, the resistance of the bullet 10 when passing through the barrel 70 is reduced, and it is possible to suppress the problem that the material constituting the shell 21 easily adheres to the barrel 71.

  Next, a method of manufacturing the bullet 10 will be described. To manufacture the bullet 10, first, as shown in FIG. 5A, a bullet 11 and a bullet receiver 51 for forming the shell 21 are prepared. The ballistic receiver 51 has a tubular structure with one end closed, and is composed of a straight tube portion 52 and a sharp portion 53 extending from one end of the straight tube portion 52. The inner diameter of the straight tube portion 52 is slightly larger than the outer diameter of the bullet 11. The straight cylindrical portion 52 is formed to be longer than the straight portion 22, and the sharp portion 53 is formed in the same shape as the head 23.

  Next, as shown by the arrow in FIG. 5A, the bullet 11 is inserted into the bullet receiving member 51 from the side of the bullet head 13, and as shown in FIG. It is received by the ballistic receptor 51. At this time, the bullet head 13 comes into contact with the inner surface of the pointed portion 53, and the tail portion 14 is disposed forward of the open end of the bullet receiver 51 (the other end of the straight cylindrical portion 52) in the insertion direction.

  Next, as shown by an arrow in FIG. 5B, the other end of the straight cylindrical portion 52 is swaged, and the straight-tail portion 24 and the straight-fastened portion 22 are formed from the straight cylindrical portion 52. In addition, the instep head 23 is formed from the sharp portion 53. Thus, the bullet 10 shown in FIG. 1 is completed.

  Next, the operation and effect of the bullet 10 of the present embodiment will be described. In the bullet 10 according to the present embodiment, all the maximum outer diameter cylindrical portions 31 (the instep straight portions 22) formed on the shell 21 are formed in an annular shape between the bullet 10 and the entire area in the axial direction of the bullet 10. The maximum outer diameter cylindrical portion 31 can be deformed toward the center axis J1 of the bullet 10 over the entire area of the bullet 10 in the axial direction. This makes it possible to reduce the resistance of the bullet 10 when passing through the barrel 70.

  Further, in the bullet 10 of the present embodiment, the instep 21 holds the bullet 11 by fitting the instep head 23 with the bullet head 13 and the instep tail 24 with the bullet tail 14. Therefore, it is possible to stabilize the fixing of the bullet 11.

[Second embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 6, a bullet 10V for small arms of the present embodiment (hereinafter, simply referred to as “bullet 10V”) is a modified version of the bullet 10 of the first embodiment, and the configuration of the instep 121 is as follows. Are different from the upper A of the first embodiment. The bullet 10V has the same bullet 11 as the bullet 10 of the first embodiment.

  The upper shell 121 includes an upper shell straight section 122, an upper shell 123, and a lower tail section 124. The armored straight portion 122 has a straight cylindrical shape extending along the center axis J1 of the bullet 10V, and has a constricted portion 125 which is depressed toward the bullet 11 over the entire circumferential direction. An annular groove 126 is formed on the outer peripheral surface of the instep straight portion 122 by the constricted portion 125. The to-be-rested head 123 and the to-be-tailed portion 124 have the same configuration as the to-be-rested head 23 and the to-be-tailed portion 24 of the to-be-rested 21 of the first embodiment.

  As shown in FIG. 6, the annular groove 126 of the upper shell 121 engages with the cartridge case 42. Specifically, the open end of the front end tube portion 42A of the cartridge case 42 is bent inward, and the bent portion of the front end tube portion 42A engages with the annular groove 126 in an uneven manner.

  In the bullet 10V, similarly to the first embodiment, the instep head 123 and the center head 13 are fitted, and the instep tail 124 and the center tail 14 are fitted. In addition, in the bullet 10V, the constricted portion 125 of the instep straight portion 122 is fitted to the bullet straight portion 12. That is, in the bullet 10V, the bullet 11 is held on the instep 121 at the three locations of the bullet straight portion 12, the bullet head 13, and the bullet tail 14.

  As described above, since the constricted portion 125 of the shielded straight portion 122 is fitted to the center of gravity 11, each of the portion of the shielded straight portion 122 located on the front side and the rear side of the confined portion 125 is It is the maximum outer diameter cylindrical portion 31 that constitutes the portion where the outer diameter becomes maximum in the bullet 10V. Note that each maximum outer diameter cylindrical portion 31 has an annular gap 32 between itself and the bullet center straight portion 12 over the entire area of the bullet 10V in the axial direction.

  The bullet 10V is manufactured as follows. In order to manufacture the bullet 10V, first, as shown in FIG. 7A, the bullet 11 and the bullet receiver 151 for forming the shell 121 are prepared. The elastic center receiver 151 has a modified structure of the elastic center receiver 51 of the first embodiment, and differs from the elastic center receiver 51 in that a constricted portion 125 is formed in the straight cylindrical portion 52. .

In the same manner as in the first embodiment, the bullet 11 is inserted into the bullet receiver 151 (FIG. 7A), and the bullet 11 is received by the bullet receiver 151 (FIG. 7B). ). Next, as shown by the arrow in FIG. 7B, the other end of the straight cylindrical portion 52 is swaged, and a straight upper portion 124 and a straight upper portion 122 are formed from the straight cylindrical portion 52. In addition, the instep head 123 is formed from the sharp part 53 of the ballistic center receiver 151. Thus, the bullet 10V shown in FIG. 6 is completed.

  As another manufacturing method of the bullet 10V, the bullet receiver 51 of the first embodiment is used in place of the bullet receiver 151, and after the bullet 11 is inserted into the bullet receiver 51, the bullet receiver 11 is inserted. A constricted portion 125 may be formed in the body 51.

  Next, the operation and effect of the bullet 10V will be described. In the bullet 10V, the maximum outer diameter cylindrical portion 31 can be deformed toward the center axis J1 side of the bullet 10 over the entire area of the bullet 10 in the axial direction, as in the first embodiment. This makes it possible to reduce the resistance of the bullet 10 when passing through the barrel 70. In addition, in the bullet 10V, the bullet 11 is held at the three places of the instep head 123, the instep tail 124, and the constricted portion 125, so that the fixation of the bullet 11 is stabilized.

[Third embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 8, a bullet 10W for small arms (hereinafter simply referred to as “bullet 10W”) of the present embodiment is a modified version of the bullet 10V of the second embodiment, and the configuration of the bullet 111 Is different from the bullet 11 of the second embodiment. The bullet 10W has the same instep 121 as the bullet 10V of the second embodiment.

  The bullet 111 includes a first bullet component 111A and a second bullet component 111B composed of a member different from the first bullet component 111A. The first and second bullet components 111A and 111B are arranged side by side. The first bullet component 111A forms a part of the straight center portion 112 and the bullet head 113, and the second bullet component 111B forms the remaining portion of the straight straight portion 112 and the tail portion 114. I do. In the example of FIG. 8, the first bullet center component 111A is arranged on the front side. Note that the first and second bullet components 111A and 111B may be made of the same material or different materials.

In the present embodiment, the constricted portion 125 is fitted with the second bullet center component 111B. Here, the axial length of the second elastic structure 111B is longer than the axial length of the first elastic structure 111A, and the constricted portion 125 is fitted to the front end of the second elastic structure 111B. I do. As described above, in the present embodiment, the first elastic component 111 </ b> A and the second elastic component 111 </ b> B having the longer axial length are held by the upper shell 121 at two locations, so that the Stabilization of fixation of the heart 111 is achieved. In addition, since the second bullet center component 111B is held by the instep 121 at both ends, the second bullet center component 111B is stably held.

  The bullet 10W of the present embodiment is manufactured in the same manner as the bullet 10V of the second embodiment. In this case, it is preferable to use the elastic center receptor 151 having the constricted portion 125.

  According to the bullet 10W of the present embodiment, it is possible to achieve the same effects as in the second embodiment. Further, in the bullet 10W, the bullet 111 is composed of the two bullet components of the first bullet component 111A and the second bullet component 111B, so that the fixing of the bullet 111 becomes unstable. However, since the center of elasticity 111 is held at the three places of the instep-backed head 123, the instep-tailed section 124, and the constricted section 125, the fixation of the center-of-arm 111 is stabilized.

[Other embodiments]
The present invention is not limited to the above-described embodiments. For example, the following embodiments are also included in the technical scope of the present invention, and furthermore, other than the following, various modifications may be made without departing from the spirit of the present invention. It can be changed and implemented.

  (1) In the first embodiment, as shown in FIG. 9, an annular groove 126 may be formed on the outer peripheral surface of the upper 21. In this case, the maximum outer diameter cylindrical portion 31 is formed in a portion of the upper A where the annular groove 126 is not formed. In the example of FIG. 9, the portion of the shell A that is disposed on the warhead 10A side and the portion that is disposed on the breech 10B side with respect to the annular groove 126 constitute the maximum outer diameter cylindrical portion 31.

  (2) In the third embodiment, as shown in FIG. 10 (A), the constricted portion 125 may be fitted to the first elastic structure 111A, or as shown in FIG. 10 (B). Alternatively, it may be fitted with both the first and second bullet components 111A and 111B.

  (3) In the third embodiment, as shown in FIG. 11, a protrusion 111T is formed on the rear end face of the first elastic structure 111A, and a protrusion is formed on the front end surface of the second elastic structure 111B. A recess 111H engaging with 111T may be formed. Then, the protrusion 111T of the first bullet center component 111A may be engaged with the recess of the second bullet center component 111B for positioning. In addition, a concave portion may be formed on the rear end surface of the first elastic structure 111A, and a protrusion may be formed on the front end surface of the second elastic structure 111B.

  (4) Like the small arms bullet 10X shown in FIG. 12, the diameter of the shell 21X is reduced stepwise between the shell part 22X and the tail part 24X on the shell part 24X side. A configuration in which the step portion 21D is formed may be used. In this case, the bullet 11X is composed of only the bullet straight portion 12X and the bullet head 13X, and has the truncated conical bullet tails 14, 114 whose diameter is reduced on the rear side as shown in the above embodiment. do not do. The instep tail portion 24X is fitted to the rear end of the straight center portion 12X, and is annular between a portion disposed in front of the non-fitting portion of the straight center portion 12X and the straight portion 22X. Gap 32 is formed.

10,10V, 10W, 10X Bullet for small arms 11,11X, 111 Bullet 12,12X, 112 Bullet straight 13,13X, 113 Bullet head 14,14X, 114 Bullet tail 21,21X, 121 22, 22X, 122 Covered straight part 23, 23X, 123 Covered head 24, 24X, 124 Covered tail 31 Maximum outer diameter cylindrical part 32-34 Gap 125 Constricted part

Claims (3)

In a small arms bullet in which the outside of a bullet configured by arranging two different members of a bullet in an axial direction is covered with an armor,
The bullet is
A bullet straight portion extending linearly in the axial direction of the small arms bullet;
A tapered head of the tapered center extending from the straight center portion to the warhead side,
A truncated cone-shaped tail portion extending from the straight center portion to the tail side,
The instep is
A cylindrical insulated straight portion forming the largest outer diameter portion of the small arms bullet;
A tapered shape extending from the instep straight part to the warhead side, and an instep head that fits with the bullet center head,
A truncated cone extending from the instep straight portion toward the breech side, and an instep portion fitted with the bullet center tail,
It is arranged only at an intermediate position near the warhead in the instep straight portion, is squeezed over the entire circumferential direction, and fits on the boundary surface between the two bullet core structures or on the breech side from the boundary surface. Having a constricted part,
A small arms bullet having an annular gap between the entire straight portion of the shell except the constricted portion and the straight center portion of the bullet. 2. The small arms bullet according to claim 1, wherein the bullet center is longer on the stern side than the warhead side of the boundary surface among the two bullet centers. 3. In a small arms bullet with the outer shell covered by an armor,
The shell comprises a portion having the largest outer diameter in the small arms bullet, and at least one maximum outer diameter cylindrical portion extending in the axial direction of the small arms bullet is provided,
All the maximum outer diameter cylindrical portions have an annular gap between the small arms and the bullet over the entire area in the axial direction of the bullet for small arms,
The bullet includes a straight center portion extending linearly in the axial direction of the small arms bullet, a tapered head extending from the straight center portion to the warhead side, and a tapered head. And a truncated cone-shaped tail that extends from the straight part to the breech side and is contracted on the breech side.
The armor is a straight tubular armored straight portion extending in the axial direction of the small arms bullet, and a tapered shape extending from the armored straight portion toward the warhead and having a tapered shape corresponding to the bullet head. An instep head, and an instep part extending from the instep straight part toward the nose and forming a truncated cone corresponding to the center-of-arm tail part,
The armored head is fitted with the ballistic head, and the armored tail is fitted with the ballistic tail, so that the armor retains the ballistic center, while the armored straight part is An annular gap is formed between the small arms and the straight center portion throughout the entire axial direction of the bullet for small arms,
All the maximum outer diameter cylindrical portions are provided in the instep straight portion.

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