JP4923750B2 - Gun firing bullet counting device - Google Patents

Description

  The present invention relates to a gun shot number counting device for counting gun shot numbers.

  Conventionally, those disclosed in Patent Documents 1 to 7 have been proposed as counting devices for the number of shots in a gun. Patent Document 1 describes a method in which a propellant gas is introduced into a gap portion and a piston is reciprocated in the gap portion, and the number of reciprocations is displayed mechanically or electrically. As an attachment form, an attachment is attached to the muzzle, and a long pipe is pulled out from the attachment to guide the fire gas to the counter of the wood cover.

In Patent Documents 2 and 5, the bullet number counter that recognizes the bullet firing from the shock wave and sound of the fired bullet is attached to the hand of the shooter or the gun body, and the number of bullets fired from the shock wave and sound of the fired bullet is calculated. What is counted is disclosed. Patent Document 3 discloses an apparatus in which an acceleration sensor and a sound wave sensor are attached to a barrel, a monitor is connected to both sensors via a cable, and the number of shots is counted from the vibration of the gun during shooting and the shooting sound of the bullet. ing.
Patent Document 4 discloses an apparatus in which an acceleration sensor, a memory, and the like are attached to a gun body of a small firearm, and the number of fired bullets is counted by measuring and analyzing the impact acceleration of actual bullet fire. Patent Documents 6 and 7 disclose that a sensor for detecting a pressure change in the barrel is attached to the gun body, and the number of fired bullets is counted based on the change in the fire gas pressure.

In the apparatus described in the above-mentioned Patent Document 1, since the projecting gas is guided to the counter with a long pipe, there is a concern that the pressure may drop, the counter operation may not be performed accurately, and the barrel needs to be drilled. It is necessary to attach an attachment that comes in front of the muzzle to the muzzle part, and there is a problem of deteriorating the accuracy and operability of the gun.
In the devices described in Patent Documents 2 and 5, the number of fired bullets is counted because the number of fired bullets is counted from the impact wave or sound of the fired bullet, which is a physical quantity that is easily affected by shooting conditions and is easily detected as noise. There is a problem that detection is likely to be uncertain, and the devices described in Patent Documents 3 and 4 also count the number of shots from the same physical quantity of gun vibration and bullet shooting sound, or fire from the impact acceleration of the gun body. Since the number of bullets is counted, there is a problem that detection of the number of shots is likely to be uncertain.
In the devices described in Patent Documents 6 and 7, the number of fired bullets is counted in the gun body by a change in the fired gas pressure in the gun barrel. Therefore, the gun body is limited to a gun having a gas leak hole. Although it is necessary to process a gas leak hole separately for a gun that does not have a hole, there is a problem that the accuracy of the gun is deteriorated and the cost is increased.
Japanese Utility Model Publication No. 55-162800 JP-A-8-152298 Japanese Patent Laid-Open No. 10-89894 JP 2002-277193 A Japanese Patent Laid-Open No. 2005-156012 JP 2005-226843 A JP 2006-78148 A

  It is an object of the present invention to provide a gun firing bullet number counting device that can be easily and quickly adapted to a gun having an advancing and retreating member that advances and retreats by bullet firing. The number of fired bullets is counted by detecting with a strain sensor.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is a gun firing bullet counting device which counts the number of bullets fired by the gun, and an operation provided in the detector main body so as to be movable in the axial direction. There is provided a displacement detector that is biased by a spring so as to protrude from the end face and is restricted in position, and that the displacement in the axial direction of the operating rod can be detected by a strain sensor. A connecting tool that is detachably fixed to the lower side of the support tube by a mounting tool having a band member and a mounting plate surrounding the outer surface of the barrel support cylinder, and that is attached to the barrel that moves the operating rod of the displacement detector back and forth by the firing of a bullet. The strain sensor detects a change in displacement due to the backward movement of the operating rod as a change in the amount of strain in which the cantilever of the strain sensor is deformed via a spring. To determine the number of shots Wherein the counter for counting is secured to the mounting fixture.

According to the first aspect of the present invention, the operating rod provided in the detector body so as to be movable in the axial direction is urged by a spring so as to protrude from the end face, and the displacement in the axial direction of the operating rod is distorted. A displacement detector that can be detected by a sensor is provided, and the displacement detector is detachably fixed to the lower side of the barrel support tube of the gun body by a mounting member having a band member and a mounting plate surrounding the barrel support tube. The displacement sensor operating rod is connected to a connecting tool attached to a barrel that is advanced and retracted by the projectile of the bullet, and the strain sensor detects a change in displacement due to the backward movement of the operating rod via a spring of the strain sensor. detected as a change of the deformed the strain amount, because the amount of distortion and counter for counting to determine the discharge bullet number of gun bullets by distortion time is fixed to the mounting fixture, a change in the displacement of the barrel Displacement detector strain sensor Therefore, since the number of projectiles is counted based on the strain amount and strain time of the strain sensor, it is not affected by nearby shooting sounds, shock waves or vibrations, and many people perform close-range shooting But you can accurately count the number of bullets fired by each gun.

Next, an embodiment in which the present invention is implemented in a heavy machine gun will be described with reference to the drawings.
FIG. 1 shows an outline of an on-vehicle heavy machine gun (hereinafter, referred to as a machine gun) 1. A gun body 4 having a gun handle portion 2 and a trigger portion 3 is installed on an armored vehicle or the like (not shown). A gun support member is supported to be steerable. The barrel 5 is supported by a barrel support cylinder 6 provided in the gun body 4 so as to be able to advance and retreat in the front-rear direction. The bullet is fired by the machine gun 1 by pushing a not-shown pusher provided on the rear end face of the trigger part 3 while holding a pair of levers provided in the gun grip part 2 with both hands. ing.
The machine gun 1 is equipped with a fire bullet number counting device 8 capable of counting the number of shot bullets. The firing bullet number counting device 8 is detachably fixed by a mounting tool 12 having a pair of band members 9 surrounding the outer periphery of the barrel support cylinder 6 and a lateral mounting plate 10 below the barrel support cylinder 6 of the gun body 4. The displacement detector 13 that is mounted, a counter 20 (also referred to as a counter) that is detachably fixed to the mounting plate 10, and a shooter (gun operator) that is not mounted on the machine gun 1 are carried by it. A portable display device 30 and a portable operation device 40 carried by a shooter (gun operator) or the like without being mounted on the machine gun 1 are also provided.

  As shown in FIG. 2, the displacement detector 13 has an operating rod 15 protruding from one end face supported at the center of a detector main body 14 formed of a hollow tube container so as to be movable in the axial direction. Is urged in the protruding direction by a spring 17 interposed between the cantilever 16a of the strain sensor 16 installed in the detector main body 14 and the latching piece 15a fixed to the operating rod 15, and the detector main body. 14 is abutted against a stopper 18 fixed to the inner surface, and the position is regulated. The detector main body 14 of the displacement detector 13 is mounted so that the operating rod 15 faces the front of the gun, and the tip of the operating rod 15 is detachably fixed to the barrel 5 via a connector 19. The strain sensor 16 of the displacement detector 13 converts the change in displacement due to the backward movement of the operating rod 15 into a change in strain amount in which the cantilever 16a of the strain sensor 16 is deformed via the spring 17, and is shown in FIG. Such a distortion amount and a distortion time waveform are detected, that is, as a waveform data of a distortion amount change with respect to the time axis.

  As shown in FIG. 3, the counter 20 includes a substrate 23 equipped with a microcomputer 22 in which the number of bullets of a gun bullet is determined and counted in the case 21 based on the strain amount and the strain time of the strain sensor 16. Built-in via a buffer material 24, a battery 25 as a power source installed on the substrate 23 is built-in, and light emission that displays the current counter normality, abnormality, communication status, etc. by turning on, turning off, and blinking. A pair of green and red light emitting diodes 26 exemplified as a body is provided on the substrate 23. The status of the counter 20 displayed when the red and green light emitting diodes 26 are lit, extinguished, and blinking are, for example, normal, blinking green, unlit red, and abnormal (failed or not connected), blinking green, lit red. , In the case of setting bullet arrival notification, green blinking, red blinking, battery shortage, green blinking, red blinking quickly, charging / communication is lit green, red lighting, charging is completed, green lighting Although it is turned off in red, it may be changed arbitrarily. A liquid crystal may be used as the light emitter. As the power source, a battery may be used instead of the battery 25, or a rechargeable solar battery may be used. The substrate 23, the battery 25, and the light emitting diode 26 are protected from heat and impact applied from the outside by the buffer material 24. The counter 20 is provided with a detachable connector 27 for signal transmission so that it can be easily and quickly connected to and detached from a connector provided in a portable display unit described later and a connector provided in an operation unit. is there. The microcomputer 22 of the counter 20 is electrically connected to the strain sensor 16 of the displacement detector 13 via a cord 28, and inputs the strain amount and strain time detected by the strain sensor 16 to the microcomputer 22. . The microcomputer 22 uses the waveform data of the distortion amount and the distortion time indicated by the reference symbol A in FIG. Determines whether or not the gun bullet is fired based on the combination of whether or not the gun is within the reference value T (in the case of a machine gun, for example, about 0.01 to 0.1 seconds). When the time H during which the amount of distortion is greater than the reference value S by firing and within the reference value T by firing the bullet of the gun is counted as the number of bullets fired.

The display 30 is configured to be a portable type separate from the counter 20 in order to reduce the weight and size of the counter 20. The display 30 includes a display body 32 and a detachable connector 33 for signal transmission, as well as a case 31 that is about the palm of a hand that can be stored in a pocket. The display device 30 connects the connector 33 to the connector 27 of the counter 20 so that the number of bullets shot and stored by the microcomputer 22 of the counter 20 is read and displayed on the display body 32. It is.
Similar to the display device 30, the operation device 40 is configured to be a separate and portable type from the counter 20 in order to reduce the weight and size of the counter 20. The operation device 40 is configured by incorporating an operation member 42 in a case 41 having a size of a palm that can be stored in a pocket and a detachable connector 43 for signal transmission. The operation device 40 is configured to change the data of the number of bullets shot and stored by the microcomputer 22 of the counter 20 by connecting the connector 43 to the connector 27 of the counter 20. In addition, you may comprise the operating device 40 with a commercially available personal computer.

Next, an operation when the number of bullets fired from the machine gun 1 is counted by the shot number counting device 8 will be described.
First, before the bullet of the machine gun 1 is fired, it is checked that the green light emitting diode 26 blinks and the red light emitting diode 26 is turned off by looking at the light emitting diode 26 of the counter 20. Confirm that is functioning properly.
When the bullet of the machine gun 1 is fired in this state, the barrel 5 is retracted instantaneously by a predetermined amount due to the bullet gas pressure of the bullet and returned. By moving the barrel 5 backward, the operating rod 15 of the displacement detector 5 is integrally moved backward, the spring 17 of the displacement detector 13 is compressed, and the cantilever 16a of the strain sensor 16 is deformed. The sensor 16 detects and outputs the displacement change of the backward movement of the operating rod 15 as the change of the distortion amount indicated by the symbol A in FIG.
Data on the change in strain detected by the strain sensor 16 is input to the microcomputer 22 of the counter 20. The microcomputer 22 determines whether or not the amount of distortion is equal to or greater than the reference value S due to the bullet firing of the gun, based on the waveform data of the amount of distortion and the distortion time indicated by the symbol A in FIG. It is determined whether or not the gun bullet is fired by a combination of whether or not the time H is within the reference value T by the gun bullet firing, and the amount of distortion is greater than the reference value S by the gun bullet firing and the amount of distortion occurs. When the time H is within the reference value T by the gun bullet firing, it is determined that the bullet has been fired, the number of fired bullets is counted, and the microcomputer 22 stores the number of shots “1”. The count of the number of shots as described above is counted for each bullet shot of the machine gun 1 and the cumulative value of the number of shots is stored in the microcomputer 22.

When counting the number of bullets fired from the machine gun 1 as described above, if the gun is operated by operating the trigger unit 3 with no bullets inserted when the first bullet is loaded or mischief is performed, Then, the barrel 5 of the machine gun 1 moves backward to move the operating rod 15 of the displacement detector 13 backward, and the cantilever 16a of the strain sensor 16 is deformed to the same extent as in the case of bullet firing. However, in this case, the barrel 5 is moved backwards at a low speed and over a relatively long time h as shown by reference numeral B in FIG. Time h is other than the reference value T due to the bullet firing of the gun, even if the amount of distortion is greater than the reference value S, the backward movement of the barrel 5 is not judged as a bullet firing and is not counted as the number of bullets fired. . Also, the machine gun 1 is dropped and a large impact is applied to the gun. As a result, the barrel is slightly moved backward (cannot move full stroke), and the operating rod 15 of the displacement detector 13 is moved backward. The cantilever 16a of the strain sensor 16 may be deformed. However, in this case, since the barrel 5 is moved backwards slightly as compared with the bullet movement as shown by reference C in FIG. 5, the microcomputer 22 has a distortion amount that is a reference value obtained when the gun bullet is fired. Since it is less than S, the backward movement of the barrel 5 is not counted as the number of bullets fired even when the amount of distortion is within the reference value T.
As described above, the change in displacement of the barrel 5 due to the bullet firing of the machine gun 1 is detected as the strain amount and the strain time by the strain sensor 16 of the displacement detector 13, and the barrel 5 is detected by the waveform data of the strain amount and the strain time. It is possible to eliminate the malfunction due to air shooting and gun dropping, and to accurately determine the number of bullets fired from machine gun 1. Can be counted. In the above embodiment, the display unit and the operation unit are provided separately from the counter, but the display unit and the operation unit may be incorporated into the counter by reducing the size of the display unit and the operation unit. The instrument may be assembled to the gun body and electrically connected to the counter.

  In the embodiment, the display device and the operation device may be provided integrally. The counter may be provided with a switch to turn the power on and off, but since there is a risk of forgetting the operation to turn on the power, a safety device is provided so that the gun cannot be triggered unless the power is turned on, It is preferable to link with an existing safety device. In the above embodiment, when the microcomputer determines whether or not it is due to bullet firing, the time during which the amount of distortion is generated is set to be equal to or less than the reference value T. It may be set when it is between the reference values, and the number of shots can be counted more accurately by setting in this way.

1 is a perspective view of a heavy machine gun showing an embodiment in which the present invention is implemented in a heavy machine gun. It is sectional drawing which shows the displacement detector of FIG. FIG. 2 is a perspective view showing a part of the counter of FIG. FIG. 2 is an exploded perspective view of FIG. 1. It is a graph which shows the waveform data of the distortion amount and distortion time explaining the effect | action of this invention .

Explanation of symbols

1 Machine gun (gun)
4 Gun body 5 Barrel (advancing / retracting member)
8 Firing bullet number counting device 13 Displacement detector 14 Hollow tube container 15 Actuation rod 16 Strain sensor 17 Spring 20 Counter 22 Microcomputer 25 Battery (power supply)
26 Light-emitting diode (light-emitting body)
27 connector 30 indicator 33 connector 40 operation device 43 connector 50 rifle (gun)
55 槓桿

Claims (1)

In a gun shot number counting device that counts the number of shot shots of a gun, the position of the detector body is urged by a spring so as to protrude from the end face so as to be movable in the axial direction of the detector body and regulated in position. And a displacement detector capable of detecting the displacement in the axial direction of the operating rod by a strain sensor, and the displacement detector includes a band member that surrounds the outside of the barrel support cylinder on the lower side of the barrel support cylinder of the gun body. The displacement detector is fixed detachably by a mounting tool having a mounting plate, and the operating rod of the displacement detector is connected to a connecting tool attached to a barrel that is advanced and retracted by projecting a bullet, and the strain sensor detects a change in displacement due to the backward movement of the operating rod. A counter that detects and counts the number of bullets fired from the gun's bullets based on the amount of strain and the strain time is detected by the strain sensor. that it is Gun firing bullets counting device that the butterflies.

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