Sight adjustment device in simulation gun

Abstract

A sight adjustment device, which adjusts a course of a bullet to be shot when shooting the bullet loaded in a cartridge portion of each of barrels, in a simulation gun having a plurality of the barrels includes a plurality of pressurization members that add pressure to the bullet loaded in each cartridge portion such that rotation is applied to each bullet; link members that are provided on a side of a gun main body such that one end portion is disposed on a side of the pressurization members and the other end portion is disposed on a side of operation units, and transmit operations of the operation units to the pressurization members; and the operation units that are provided on the side of the gun main body in order to adjust a backspin amount.

Claims

1. A sight adjustment device, which adjusts a shooting course of a bullet loaded in a cartridge portion of each of a plurality of barrels of a simulation gun, and the sight adjustment device comprising: an operation unit, a link member and a plurality of pressurization members; wherein the operation unit is provided on a main body of the gun and the operation unit adjusts a backspin amount for the bullet, wherein one end portion of the link member is disposed on the operation unit, the other end portion of the link member is disposed on at least one of the plurality of pressurization members, and the link member transmits the backspin amount to the plurality of pressurization members, and wherein each of the plurality of pressurization members is provided in each of cartridge portions of the plurality of barrels and adds pressure corresponding to the backspin amount to the bullet in each of cartridge portions of the plurality of barrels, thereby applying a rotational motion to the bullet at the time of shooting.

2. The sight adjustment device according to claim 1, wherein the operation unit has an engagement portion and an engagement counterpart portion, the engagement portion is configured as a multi-spiral portion in a rotary operation piece, the engagement counterpart portion is provided on an end portion of the link member and able to engage with the engagement portion.

3. The sight adjustment device according to claim 1, wherein each of the plurality of pressurization members is provided in upper portion of each of cartridge portions of the plurality of barrels and has a pressurization projection that comes into contact with an upper portion of the bullet in the cartridge portion, and wherein the pressurization member adds downward pressure corresponding to the backspin amount to the bullet in each of cartridge portions of the plurality of barrels, thereby applying an upward rotational motion to the bullet at the time of shooting.

4. The sight adjustment device according to claim 1, wherein the sight adjustment device has a plurality of the operation units and a plurality of the link members, wherein each of the plurality of the operation units independently adjusts the backspin amount for the bullet, wherein each of the link members independently transmits the backspin amount at the operation unit to one of the plurality of pressurization members, and wherein each of the plurality of pressurization members adds pressure corresponding to the independently operated backspin amount to the bullet in each of cartridge portions of the plurality of barrels, thereby applying a rotational motion to the bullet at the time of shooting.

5. The sight adjustment device according to claim 1, wherein the link member has a lever and a push member, wherein the lever is pivotally supported between the one end portions and the other end portions, and one end portion of the lever communicates with the operation unit, wherein the push member is movable in a vertical direction and a lower end portion of the push member comes into contact with one of the plurality of pressurization members, and wherein the other end portion of the lever and a lower end portion of the push member come into contact with each other.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a side view illustrating an example of a simulation gun in which a sight adjustment device according to the present invention is applied.

(2) FIG. 2 is a sectional view illustrating an enlarged main portion of the simulation gun in which the sight adjustment device according to the invention is applied.

(3) FIG. 3 is an exploded perspective view illustrating a cylinder assembly and a piston assembly used in the simulation gun according to the invention.

(4) FIG. 4 consists of FIGS. 4A and 4B and illustrates the cylinder assembly used in the simulation gun according to the invention. FIG. 4A illustrates a side view, and FIG. 4B illustrates a longitudinal sectional view taken along a central line.

(5) FIG. 5 is a side view illustrating the piston assembly according to the invention.

(6) FIG. 6 is a view illustrating an electric mechanism according to the invention.

(7) FIG. 7 consists of FIGS. 7A, 7B and 7C and illustrates a cartridge assembly in which the sight adjustment device according to the present invention is embedded. FIG. 7A is a longitudinal sectional view taken along the central line, FIG. 7B is a rear view of the cartridge assembly from which a member of a bullet supply unit is removed, and FIG. 7C is at rear view of the cartridge assembly.

(8) FIG. 8 is an exploded perspective view illustrating the cartridge assembly according to the invention.

(9) FIG. 9 consists of FIGS. 9A and 9B and illustrates rear end portions of barrels. FIG. 9A is a perspective view, and FIG. 9B is a cross-sectional view.

(10) FIG. 10 consists of FIGS. 10A, 10B and 10C and illustrates the rear end portions of the barrels according to the invention. FIG. 10A is a top view, FIG. 10B is a left-side view, and FIG. 10C is a longitudinal section taken along a central line.

(11) FIG. 11 consists of FIGS. 11A and 11B and illustrates the same sight adjustment device according to the invention. FIG. 11A is a right-side view schematically illustrating a fine adjustment mechanism, and FIG. 11B is a view of the appearance of the same device.

(12) FIG. 12 consists of FIG. 12A, FIG. 12B and FIG. 12C and illustrates a state of an upper barrel when the sight adjustment device according to the present invention is not adjusted. FIG. 12A is a top view, FIG. 12B is a longitudinal sectional view taken along the central line, and FIG. 12C is a cross-sectional view.

(13) FIG. 13 consists of FIGS. 13A, 13B and 13C and illustrates a state of the upper barrel when the sight adjustment device according to the present invention is adjusted. FIG. 13A is a right-side view. FIG. 13B is a longitudinal sectional view taken along the central line, and FIG. 13C is a cross-sectional view.

(14) FIG. 14 consists of FIGS. 14A, 14B and 14C and illustrates a state of a lower left barrel when the sight adjustment device according to the present invention is not adjusted. FIG. 14A is a top view, FIG. 14B is a longitudinal sectional view taken along the central line, and FIG. 14C is a cross-sectional view.

(15) FIG. 15 consists of FIGS. 15A, 15B and 15C and illustrates a state of the lower left barrel when the sight adjustment device according to the present invention is adjusted. FIG. 15A is a right-side view, FIG. 15B is a longitudinal sectional view taken along the central line, and FIG. 15C is a cross-sectional view.

(16) FIG. 16 consists of FIGS. 16A, 16B and 16C and illustrates a state of a lower right barrel when the sight adjustment device according to the present invention is not adjusted. FIG. 16A is a top view, FIG. 16B is a longitudinal sectional view taken along the central line, and FIG. 16C is a cross-sectional view.

(17) FIG. 17 consists of FIGS. 17A, 17B and 17C and illustrates a state of the lower right barrel when the sight adjustment device according to the present invention is adjusted. FIG. 17A is a right-side view, FIG. 17B is a longitudinal sectional view taken along the central line, and FIG. 17C is a cross-sectional view.

REFERENCE NUMBERS

(18) 10 Compressed Air Generating Unit 11, 12, 13 Barrel 14 Cartridge Portion 15 Sight Adjustment Device 16 Connection Gasket 18 Switch 19 Outer Barrel 20 Cylinder Assembly 21, 22, 23 Cylinder 24 Blast Nozzle 25 Pipe Member 26 Front Fixing Member 27 Rear Fixing Member 28 Inter-Nozzle 29 Nozzle Base 30 Piston Assembly 31, 32, 33 Piston 34 Joint Portion 35 Piston Shaft 36 Rack 37 Rod 38 Seal Member 39 Gear Disposition Space 40 Electric Mechanism 41 Output Gear 42 Elastic Member 43 Electric Motor 44 Pinion 45 Reduction Gear Set 46 Piston Movement Portion 47 Guide Groove 48 Selector 49 Latch Member 50 Cartridge Assembly 51 Magazine 53 Bullet Supply Unit 54 Receiving Member 55 Switching Mechanism 57 Opening 58a, 58b Cover 60 Cartridge Portion Housing 61, 62, 63 Pressurization Member 64, 65, 66 Link Member 67, 68, 69 Operation Unit 70 Fine Adjustment Means 71, 72, 73 Push Member 74, 75, 76 Lever 77, 78, 79 Dial

DETAILED DESCRIPTION OF THE INVENTION

(19) Hereinafter, with reference to the illustrated embodiment, the present invention will be described in more detail. FIG. 1 is a general view of a simulation gun in which a sight adjustment device of the present invention is applied. The simulation gun is a long barreled-type multi-bullet shooting electric gun G. The electric gun G has three barrels 11, 12, 13. Therefore, a compressed air generating unit 10 is configured to have a cylinder assembly 20 constituted by three cylinders 21, 22, 23, a piston assembly 30 constituted by three pistons 31, 32, 33, and an electric mechanism 40 driving the piston assembly 30.

(20) A cartridge assembly 50 is provided in a rear portion of the barrels, and a detachable magazine 51 is mounted at a lower portion thereof. A cartridge portion 14 is set in the cartridge assembly 50, so that a bullet B is disposed inside the rear end of each of the three barrels 11, 12, 13. The cartridge portion 14 is provided with a sight adjustment device 15 for adjusting a trajectory (FIG. 2). A connection gasket 16 covers the outside of the rear ends of the three barrels 11, 12, 13. The connection gasket 16 is formed of a soft material such as rubber, having seal performance.

(21) The compressed air generating unit 10 is a part generating air with which the bullet B is blasted in order to shoot each bullet B from each of the barrels 11, 12, 13 in the multi-bullet shooting electric gun G. The barrels themselves are combined such that three thereof form a triangle shape when seen from the front. The compressed air generating unit 10 is disposed at the rear inside the electric gun G. The cylinder assembly 20, the piston assembly 30, and the electric mechanism 40 configuring the compressed air generating unit 10 are disposed in an approximately straight line in order thereof.

(22) The cylinder assembly 20 is positioned in a rear portion of the three barrels 11, 12, 13, has an air-blast nozzle 24 at a tip end, and has the three cylinders 21, 22, 23 in which the pistons 31, 32, 33 respectively reciprocate. The illustrated cylinder assembly 20 is configured to have three pipe members 25, a front fixing member 26 fixing each of the pipe members 25 to a tip end portion, and a rear fixing member 27 fixing each of the pipe members 25 to a rear end portion (refer to FIGS. 3 and 4).

(23) The air-blast nozzle 24 is provided in the front fixing member 26, and an insertion port 25a for the piston is open in the rear fixing member 27. A blast nozzle 24 is provided in front of a pipe attachment member 25b, and the pipe attachment member 25b is attached to the rear surface of the front fixing member 26 by a fastener 25c. The pipe attachment member 25b has a positional relationship with the pipe member 25 in which the pipe attachment member 25b is fitted, and is assembled in an air-tight manner by using seal means 26a (FIG. 4).

(24) As seen in the illustrated embodiment, an inter-nozzle 28 is connected to the cartridge portion 14 and the air-blast nozzle 24 and is provided to be movable in the forward-rearward direction by a nozzle base 28. The inter-nozzle 28 slides with respect to the blast nozzle 24 in an air-tight manner and is at a position where a bullet is blasted with compressed air generated in the compressed air generating unit 10. The inter-nozzle 28 is attached to an erected portion 29a of the nozzle base 29 and is incorporated in a main body of the simulation gun G so as to be able to advance and retract.

(25) Therefore, the inter-nozzle 28 retracts by being engaged with a latch member 49 described below, in response to retract operations of the pistons 31, 32, 33 and is caused to advance by a spring of biasing means 29b acting on the nozzle base 29 (refer to FIG. 2). Then, the tip end thereof is configured to also slide with respect to the connection gasket 16 in an air-tight manner, to be separated from the connection gasket 16, and to retract so as to ensure a gap in which the bullet B is pushed up in the rear end portion of the barrel. Thereafter, the inter-nozzle 28 advances so as to push the bullet B into the cartridge portion 14.

(26) The air-blast nozzle 24 is provided at a position leaning to the center of the pipe members 25, 25, 25 of the three cylinders 21, 22, 23. This countermeasure is provided because the air-blast nozzle 24 cannot coincide with the center of a cylinder pipe having a diameter larger than the barrel, since the number of a plurality of the barrels 11, 12, 13 in the illustrated example is three. Thus, the position of the air-blast nozzle 24 is determined based on the relationship between the barrel and the position of the center of the cylinder pipe.

(27) The piston assembly 30 has the three pistons 31, 32, 33 which respectively reciprocate inside the cylinders 21, 22, 23 and generate compressed air. In addition, the three pistons 31, 32, 33 are configured to be bound in one place by a joint portion 34 at the rear and to be integrally provided with one piston shaft 35 having a rack 36 along a reciprocating direction and the joint portion. (refer to FIG. 5).

(28) The three pistons 31, 32, 33 are flexibly joined to the joint portion 34 such that seal performance between the pistons 31, 32, 33 and cylinder inner wall surfaces is maintained due to the joined state. That is, when the pistons and the cylinders configuring a piston cylinder mechanism have high precision in the positional relationship or the fitting state therebetween, it becomes easy to obtain high compressibility. Moreover, the axial centers therebetween also have to coincide with each other with high precision. However, when a certain degree of flexibility is allowed, it is possible to obtain high compressibility without requiring excessive precision.

(29) In order to apply the flexibility, the present invention employs a configuration in which the pistons 31, 32, 33 are provided at the tip end of slender rods 37 so as to be movably pivoted by the joint portion 34 sit the rear of the rods 37. In the configuration of the illustrated embodiment, the rods 37 are pivoted with respect to the reciprocating direction of the pistons by using a pivot 37a in the transverse direction such that the rods 37 become movable in the vertical direction. The air-tightness of the pistons 31, 32, 33 is maintained by using the illustrated O-rings as seal members 38.

(30) In the configuration of the embodiment in which the piston cylinder mechanism is constituted by three sets, as described above, the three sets are combined in the piston assembly 30 so as to have a triangle shape when seen from the front, the piston shaft 35 is disposed in the joint portion 34 with a positional relationship of being shifted downward from a central portion of the three sets, and the rack 36 is positioned at the top of a part which is shifted downward. Therefore, the position of the rack 36 becomes close to the central portion of the three sets. Accordingly, it is possible to gain a disposition space 39 for the electric mechanism 40 of an output gear 41, and driving force of the output gear 41 is more efficiently transmitted from a position close to the center line.

(31) The electric mechanism 40 is configured to cause the piston assembly 30 to retract, to cause an elastic member 42 to accumulate pressure, and to drive the output gear 41 meshing with the rack 36 in order to compress air by releasing the accumulated pressure. As a description with reference to FIG. 6 in detail, the reference number 43 indicates an electric motor, that is, a motor, the reference sign 44 indicates a pinion attached to a rotary shaft thereof, and the reference number 45 indicates a reduction gear set constituted by several gears meshing with the pinion 44. The output gear 41 is constituted by a sector gear. The sector gear 41 has a toothed portion 41a which meshes with the rack 36 and causes the piston assembly 30 to retract, and a non-toothed portion 41b which does not mesh with the rack 36 and enables the piston assembly 30 to advance.

(32) The piston shaft 35 has a hollow structure and is biased in the advancing direction by the elastic member 42 illustrated as a coil spring which is hollow inside. One end of the elastic member 42 constituted by the coil spring is in contact with the front end of the piston shaft which is hollow inside, and the other end is supported by the rear end of the cavity which is a movement portion 46 for the piston provided inside the electric mechanism 40. The reference number 47 indicates a guide portion constituted by an irregular structure. The guide portion 47 is provided, in a laterally longitudinal direction of the piston shaft 35 and engages with a projection 46a which is an engagement counterpart constituted by an irregular structure provided on the gun main body side, thereby functioning as a guide for moving straight forward (refer to FIG. 6).

(33) In addition to the description above, the multi-bullet shooting electric gun G of the embodiment includes mechanisms required for operating as an electric gun, such as a power source battery (not illustrated), a circuit connecting the power source battery and the electric motor 43, and a switch for turning on and off the power source. The reference number 18 indicates the switch, the reference number 19 indicates an outer barrel housing the three barrels, the reference number 48 indicates a selector for selecting a shooting mode, and the reference number 49 indicates the aforementioned latch member. The latch member 45 is pivoted at the rear end of the nozzle base 29 by a pivot 29a as vertically movable engagement means. The latch member 49 is configured to be retractable by being engaged with an engagement counterpart portion 49a provided in the piston shaft 35 and to be able to be disengaged by coming into contact with a disengagement portion 49b provided on the gun main body side. The reference number 49c is a spring, which is biasing the latch member 49 in a direction for engaging with the engagement counterpart portion 49a (refer to FIG. 2). The spring 29b is configured to act on the nozzle base 29 as forward biasing means so as to push out the supplied bullet B to the cartridge portion 14.

(34) In the sight adjustment device 15 in a simulation gun of the present invention, an assembly is provided in a part of the cartridge assembly 50 positioned in the rear portion of the barrels (refer to FIG. 2). The detachable magazine 51 is mounted in a lower portion. Through a supply passage 51a connected to a ballet supply port thereof, the ballet B is pushed up one shot at a time and is supplied to a bullet supply unit 53. The bullet supply unit 53 is positioned at the rear end of the cartridge assembly 50 and internally has a receiving member 54 which receives the supplied bullet B. The receiving member 54 has three receiving portions 55 in total, that is, one at the top center and two at the lower right and left. The receiving member 54 is pushed downward by a spring 56 which is biasing means (refer to FIG. 7).

(35) The bullet supply unit 53 is penetrated in the forward-rearward direction by openings 57 in three places. The tip end portion of the inter-nozzle 28 can be inserted into each of the openings 57. That is, the openings 57 in the three places are set such that the disposition thereof completely coincides with the cartridge portions 14 respectively positioned inside the three barrels at the rear end, and the receiving portions 55 in the three places. Therefore, in the configuration, when the inter-nozzle 28 advances, the ballets B pushed up by the receiving portions 55 in the three places can be respectively sent to the cartridge portions 14 in the rear portions of the three barrels 11, 12, 13.

(36) In the illustrated example, the cartridge assembly 50 positioned at the rear end of the three barrels 11, 12, 13 has covers 58A, 58B constituted by two upper and lower members. In addition, the covers 58A, 58B and the bullet supply unit 53 are integrally assembled by a fastener 59 illustrated as a screw. As illustrated in FIGS. 7 to 9, the rear end portions of the covers 58A, 58B approximately coincide with the rear end portions of the three barrels 11, 12, 13. In the rear end portions of the barrels 11, 12, 13, there is provided a cartridge portion housing 60 surrounding the cartridge portions 14.

(37) The cartridge portion housing 60 has the appearance in which three cylinders are bundled, and the rear end thereof forms openings 60a, 60b, 60c facing the bullet supply unit 53 via the receiving member 54. The reference number 60d indicates a straightening portion provided for the bullet B to be induced to the target cartridge portion 14. The three barrels 11, 12, 13 respectively occupy the ins ides of the cylinders. Therefore, a device for a sight adjustment is provided in this part (loading portion 14). The sight adjustment in the illustrated embodiment applies upward rotation to a bullet. Pressurization members 61, 62, 63 are each disposed in upper portions of the barrels 11, 12, 13 (FIG. 9B).

(38) The pressurization members 61, 62, 63 are formed of elastic materials called gaskets sometimes, have cylindrical shapes, and are respectively and partially (in the illustrated example, in an upper portion) provided with pressurization projections 61a, 62a, 63a which come into contact with the bullets B (refer to FIGS. 7A, and 9B). The embodiment illustrates an example in which a plurality of link members and a plurality of operation units are provided so as to respectively correspond to a plurality of the pressurization members, and each of the link members and the operation units is configured to be able to be independently operated and adjusted. Therefore, in order to transmit operations of operation units 67, 68, 69 to the pressurization members 61, 62, 63, link members 64, 65, 65 axe provided on a side of the gun main body such that one end portion is disposed on a side of the pressurization members 61, 62, 63 and the other end portion is disposed on a side of the operation units 67, 68, 69.

(39) Similar to the three barrels 11, 12, 13, there are three pressurization members 61, 62, 63 in total, that is, one at the top center and two at the lower right and left. The operation units 67, 68, 69 are bound on one side (right side in the illustrated example) of the gun main body. For the communication thereof, there are provided the link members 64, 65, 66. The link members 64, 65, 66 are constituted by push members 71, 72, 73 which are provided so as to be movable in the vertical direction and of which lower portions come into contact with the pressurization members 61, 62, 63, and levers 74, 75, 76 of which one end portions are joined to upper portions of the push members 71, 72, 73 and of which the other end portions communicate with the operation units 67, 68, 69. The levers 74, 75, 76 are pivotally supported by shafts 74a, 75a, 76a as described below (refer to FIGS. 12C, 14C and 16C).

(40) The push members 71, 72, 73 are configured to be inserted into guide holes 71a, 72a, 73a in the vertical direction formed in the cartridge portion housing 60 so as to be movable in only the vertical direction. Meanwhile, the levers 74, 75, 76 have configurations of levers which are attached so as to be rotatable about the shafts 74a, 75a, 76a between the one end portions and the other end portions. In a case of taking the configuration as a lever, the moment arm on a side of the point of force is shorter than that on a side of the point of action. Therefore, in the configuration, the output amount of the moment arm is greater than the input amount thereof in the levers 74, 75, 76, so that the amount of fine adjustment performed by using dials 77, 78, 79 is amplified. The push members 71, 72, 73 have arc-shaped convex portions 71b, 72b, 73b at lower ends. The convex portions 71b, 72b, 73b are provided so as to serve as means for providing the bullet B with an escape route in order to prevent bullet-clogging.

(41) In addition, the operation units 67, 68, 69 are configured to include fine adjustment means 70 for allowing an operation amount to be subjected to a fine adjustment. The fine adjustment means 70 in the embodiment is configured to include multi-spiral engagement portions 67a, 68a, 69a which are provided in rotary-type operation pieces, and engagement counterpart portions 64a, 65a, 66a which are provided in the other end portions of the link members 64, 65, 66 and are able to engage with the engagement portions (refer to FIG. 11A). Thus, the movement of the operation pieces in one rotation is a small amount as much as the component in the radial direction of the multi-spiral shape. Since the small amount of the movement is further transmitted to the pressurization members 61, 62, 63 via the levers 74, 75, 76, the sight adjustment can be precisely controlled. The operation pieces are constituted by the dials 77, 78, 79, and marks 77a, 78a, 79a indicating the operation amount are proved so as to face upward (refer to FIG. 11B).

(42) The sight adjustment device in a simulation gun of the present invention having such a configuration operates as follows. FIG. 12 illustrates a configuration relating to the sight adjustment in the upper barrel 11, that is, a state before an adjustment operation is performed. The push member 71, the lever 74, and the dial 77 correspond to the pressurization member 61 of the upper barrel 11. When the dial 77 is operated, the link member 64 operates in response to engagement between the engagement portion 67a and the engagement counterpart portion 64a. The pressurization projection 61a is pushed by the push member 71 and protrudes into the cartridge portion 14, or the protruding amount changes (FIG. 13B). The change of the protruding amount corresponds to the range of the sight adjustment amount, and the adjustment amount is indicated by the mark 77a (FIG. 13A).

(43) FIG. 14 illustrates a configuration relating to the sight adjustment in the left barrel 12, that is, a state before an adjustment operation is performed, similar to the upper barrel. The push member 72, the lever 75, and the dial 78 correspond to the pressurization member 62 of the left barrel 12. When the dial 78 is operated, the link member 65 operates in response to engagement between the engagement portion 68a and the engagement counterpart portion 65a. The pressurization projection 62a is pushed by the push member 72 and protrudes into the cartridge portion 14, or the protruding amount changes (FIG. 15B). The change of the protruding amount corresponds to the range of the sight adjustment amount, and the adjustment amount is indicated by the mark 78a (FIG. 15A).

(44) Similarly, FIG. 16 illustrates a configuration relating to the sight adjustment in the right barrel 13, that is, a state before an adjustment operation is performed, similar to the upper barrel. The push member 73, the lever 76, and the dial 73 correspond to the pressurization member 63 of the right barrel 13. When the dial 79 is operated, the link member 66 operates in response to engagement between the engagement portion 69a and the engagement counterpart portion 66a. The pressurization projection 63a is pushed by the push member 73 and protrudes into the cartridge portion 14, or the protruding amount changes (FIG. 17B). The change of the protruding amount corresponds to the range of the sight adjustment amount, and the adjustment amount is indicated by the mark 79a (FIG. 17A).

(45) In the electric gun G which is at simulation gun in which the sight adjustment device of the present invention is applied, when a trigger 17 is pulled, the switch 18 is turned on, and a drive circuit is closed due to the turning-on operation. Then, the electric mechanism 40 is actuated, and the pistons 31, 32, 33 start to retract. Subsequently, the latch member 49 and the engagement counterpart portion 49a engage with each other, and are disengaged from each other by the disengagement portion 49b. Then, a next bullet is loaded while the nozzle base 29 retracts and advances. When the pistons 31, 32, 33 reach the vicinity of a retraction limit, the sector gear 41 of the electric mechanism 40 rotates from the toothed portion 41a to the non-toothed portion 41b and is unmeshed from the rack 36. As a result, pressure accumulated in the elastic member 42 is released, and the pistons 31, 32, 33 instantaneously move to an advancing limit. Then, air inside the cylinder is compressed and is blasted as compressed air from the blast nozzle 24. Consequently, one shot each from three barrels 11, 12, 13, that is, three bullets B in total are shot.