JP2007120814A - Device for counting number of fired bullet, and system for tabulating number of used bullet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable device for counting the number of fired bullets and system for tabulating the number of used bullets, capable of counting even the number of fired bullets of a gun other than an automatic loading type. <P>SOLUTION: Every time a bullet is fired, bullet firing gas is exhausted to the side from an antiflash brake 12, and a pressure receiving member 23 is distorted by receiving a pressure of the bullet firing gas. Distortion of the pressure receiving member 23 is detected by a distortion sensor 27A, output of a distortion detecting part 27 becomes a wave form, and a counting part 37 counts output waves of the distortion detecting part 27 as the number of fired bullets. By this, if a gun is provided with an antiflash brake 12, even the number of fired bullets of a gun other than an automatic loading type can be counted. Since the distortion sensor 27A is attached to the pressure receiving member 23 externally attached to the gun, it attachment work becomes more easy than a conventional one, and manufacturing costs can be suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fired bullet number counting device that counts the number of bullets fired using a bullet fired gas pressure, and a bullet number counting system that can count the number of bullets used in a plurality of guns.

The self-loading rifle that operates by gas pressure is equipped with a cylinder attached to the barrel, and has a structure in which the bullet striking part is returned to the strikeable position by the firing gas pressure taken into the cylinder from the barrel. In the conventional bullet number counting device, a strain sensor is attached to a regulator screwed into the cylinder, and the number of shot bullets is counted based on the detection result of the strain sensor (for example, Patent Document 1). reference).
Japanese Patent Laying-Open No. 2005-226843 (paragraphs [0009] and [0010], FIG. 1)

  However, the conventional structure described above cannot count the number of bullets fired by a gun other than the automatic loading type. Further, since it is necessary to attach the strain sensor to a portion of the regulator that fits in the cylinder, it is difficult to attach the strain sensor, and the manufacturing cost increases.

  The present invention has been made in view of the above circumstances, and is capable of counting the number of shots of a gun other than the automatic loading type, and of the shot number counting device and the number of used bullets counting system that can be manufactured at low cost. For the purpose of provision.

  In order to achieve the above-mentioned object, the fire bullet counting device according to the invention of claim 1 is externally attached to the gun in a state of facing the flame extinguishing device of the gun from the side. A pressure sensing member that is distorted by the bullet firing gas pressure, a strain sensor that is fixed to the pressure sensing member, detects a distortion of the pressure sensing member due to the bullet firing gas pressure, and emits an output wave of the strain detection portion It is characterized by having a counting unit that counts as the number of bullets.

  The invention according to claim 2 is characterized in that, in the fire bullet number counting device according to claim 1, the strain sensor is arranged on a surface of the pressure receiving member facing the opposite side to the flame extinguishing device.

  According to a third aspect of the present invention, in the fired bullet number counting device according to the first or second aspect, the cantilever structure includes a bracket fixed to the barrel and protruding sideways from the barrel, and the pressure receiving member extends from the bracket. The strain sensor is characterized in that it is arranged on the base end side from the position of the pressure receiving member that receives the bullet firing gas pressure.

  The invention according to claim 4 is characterized in that in the fire bullet number counting device according to claim 3, the bayonet mounting portion for mounting the bayonet on the gun is also used as the bracket.

  The invention according to claim 5 is characterized in that, in the fired bullet number counting device according to claim 3 or 4, the counting portion is fixed to the bracket.

  A sixth aspect of the present invention is the firing bullet number counting device according to any one of the first to fifth aspects, wherein the pressure receiving member has a structure having cylindrical portions at both ends of the plate portion, and is fitted to both cylindrical portions. It is characterized in that a cylindrical cover that covers the plate part from the side is provided.

  According to a seventh aspect of the present invention, in the fire bullet number counting device according to any one of the first to sixth aspects, the pressure receiving member is formed with a pin hole coaxially with the gas discharge hole opened on the side surface of the flame extinguishing device. And has a feature in that a positioning pin inserted in common into the gas discharge hole and the pin hole is provided.

  The invention according to claim 8 is the firing bullet number counting device according to any one of claims 1 to 7, wherein the counting unit outputs only the output wave of a predetermined reference value or more among the output waves of the distortion detection unit. It has a feature in counting as.

  The invention according to claim 9 is characterized in that, in the fired bullet number counting device according to any one of claims 1 to 8, a data output unit capable of outputting a count result by the counting unit to a line or wirelessly is provided.

  According to a tenth aspect of the present invention, in the fire bullet number counting device according to the ninth aspect, the data output unit is configured to output identification data for identifying the shot bullet number counting devices together with the counting result. However, it has characteristics.

  The invention according to an eleventh aspect is characterized in that in the fired bullet number counting apparatus according to the ninth or tenth aspect, a display unit is provided which is connected to the data output unit and displays the counting result.

  A used bullet number counting system according to a twelfth aspect of the invention includes a plurality of fire bullet number counting devices according to any one of claims 1 to 11 and a counting result obtained from the plurality of shot bullet number counting devices. It has a feature in that it is provided with a data aggregation device.

[Invention of Claim 1]
According to the configuration of the first aspect, each time a bullet is fired, the bullet firing gas is discharged from the flame extinguishing device to the side, and the pressure receiving member is distorted by receiving the pressure of the bullet firing gas. At this time, the strain of the pressure receiving member is detected by the strain sensor, the output of the strain detector becomes a waveform, and the counting unit counts the output wave of the strain detector as the number of bullets fired. As described above, according to the present invention, the number of bullets fired by a gun other than the automatic loading type can be counted as long as the gun is equipped with a flame extinguishing device. In addition, since the strain sensor is attached to the pressure receiving member attached to the gun, the attachment work is easier than before, and the manufacturing cost can be reduced, and the influence of heat on the sensor is reduced and reliability is improved. Can be improved.

[Invention of claim 2]
According to the configuration of the second aspect, since the strain sensor is fixed to the surface of the pressure receiving member facing the side opposite to the flame extinguishing / retracting device, the influence of heat on the strain sensor by the bullet firing gas is further reduced. The

[Invention of claim 3]
According to the third aspect of the present invention, since the pressure receiving member has a cantilever structure, when receiving the bullet firing gas pressure, the base end side is bent and distorted from the position where the bullet firing gas pressure is received. And since the distortion sensor is arrange | positioned in the base end side from the position which receives the bullet firing gas pressure among the pressure receiving members, it can detect reliably the distortion of the pressure receiving member by bullet firing gas pressure.

[Invention of claim 4]
According to the configuration of the fourth aspect, since the bayonet mounting portion for mounting the bayonet on the gun is also used as the bracket, the manufacturing cost can be reduced as compared with the case where a separate bracket is provided.

[Invention of claim 5]
According to the fifth aspect of the present invention, since the counting unit is also fixed to the bracket to which the pressure receiving member is fixed, the fire bullet number counting device has a compact configuration.

[Invention of claim 6]
According to the configuration of the sixth aspect, the strain sensor can be protected by being covered with the cover.

[Invention of Claim 7]
According to the configuration of the seventh aspect, when the pressure receiving member is attached to the gun, the positioning pin can be easily positioned by inserting the positioning pin through the gas discharge hole of the flame extinguishing device and the pin hole of the pressure receiving member. Variations in position can be prevented.

[Invention of Claim 8]
According to the configuration of the eighth aspect, since the counting unit counts only the output wave of a predetermined reference value or more among the output waves of the distortion detection unit as the number of bullets to be fired, an error caused by an obstacle colliding with the pressure receiving member. Detection can be prevented.

[Invention of claim 9]
According to the configuration of the ninth aspect, it is possible to manage the number of bullets by outputting the counting result by the counting unit from the data output unit and taking it into an external device.

[Invention of Claim 10]
According to the configuration of the tenth aspect, it is possible to identify the number of fire bullets counting devices by the identification data output from the data output unit and know the number of bullets fired for each gun.

[Invention of Claim 11]
According to the configuration of the eleventh aspect, it is possible to know the number of projectiles by looking at the display on the display unit.

[Invention of Claim 12]
According to the configuration of the twelfth aspect, since the counting results of the number of shots of a plurality of guns are taken in and counted by the data counting device, management of the bullets is facilitated.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an example of a gun 10 to which a shot number counting device 20 of the present embodiment is attached. This gun 10 extends with a cylindrical barrel 11 exposed from the gun body, and is equipped with a flame extinguishing device 12 at the tip of the barrel 11. As shown in FIG. 2, the flame extinguishing / retreating device 12 is formed with a plurality of gas discharge holes 13 arranged in the axial direction. Each gas discharge hole 13 penetrates the flame extinguishing and retreating device 12 in the lateral direction. In addition, the gas discharge hole 13 disposed near the tip of the flame extinguishing device 12 has an oval shape extending in the axial direction of the flame extinguishing device 12, and two gas discharge holes disposed near the base end. Reference numeral 13 denotes an oval shape extending in the circumferential direction of the flame extinguishing / retreating device 12.

  The shot number counting device 20 according to the present invention is attached to a position close to the flame extinguishing device 12 in the barrel 11. For this purpose, the projectile counting device 20 is provided with a bracket 21 that can be externally attached to the barrel 11. The bracket 21 includes a pair of prismatic members 22 and 22 that extend in a direction orthogonal to the barrel 11 and face each other in the vertical direction. At one end in the longitudinal direction of these prismatic members 22 and 22, barrel housing grooves 22A and 22A are formed on the opposing surfaces. The barrel housing grooves 22 </ b> A and 22 </ b> A are addressed to the barrel 11 from the side, and the prism members 22 and 22 are fastened with bolts, whereby the bracket 21 is fixed to the barrel 11.

  A pressure receiving member 23 is held at the other end of the bracket 21 in the longitudinal direction. The pressure receiving member 23 has a structure in which cylindrical portions 25 and 26 are provided at both ends of the plate portion 24. The plate portion 24 is formed by, for example, cutting an intermediate portion in the axial direction of a columnar steel material, and the columnar portions 25 and 26 are configured by part of the columnar steel material left at both ends of the plate portion 24. One cylindrical portion 25 (hereinafter referred to as “base end side cylindrical portion 25”) is accommodated in the pressure receiving member accommodating grooves 22 </ b> B and 22 </ b> B formed on the opposing surfaces of the prismatic members 22 and 22 of the bracket 21. Is sandwiched between. As a result, the pressure receiving member 23 has a cantilever shape parallel to the barrel 11 and extends forward from the bracket 21. In addition, a part of the base end side cylindrical portion 25 protrudes forward from the bracket 21, and a cover 50 described later is fitted therein.

  The other cylindrical portion 26 (hereinafter referred to as “front end side cylindrical portion 26”) of the pressure receiving member 23 is opposed to the gas discharge hole 13 on the most proximal end side of the flame extinguishing device 12. Further, the plate portion 24 is in a state where the normal line of the flat surface thereof is orthogonal to the axis of the barrel 11. Here, in order to align the pressure receiving member 23 with respect to the flame extinguishing / retracting device 12, the tip side cylindrical portion 26 of the pressure receiving member 23 has a pin hole 26 </ b> A in a direction parallel to the normal of the flat surface of the plate portion 24. And a special positioning pin 15 is provided for alignment. The positioning pin 15 has a small diameter portion 15A corresponding to the pin hole 26A on one end side and a large diameter portion 15B corresponding to the gas discharge hole 13 on the other end side. The pressure receiving member 23 is inserted into the pin hole 26A of the pressure receiving member 23 while the large diameter portion 15B is inserted into the gas discharge hole 13 of the flame extinguishing suppressor 12 so that the pressure receiving member 23 is inserted into the flame extinguishing suppressor 12. Can be easily positioned at a regular mounting position (see FIG. 3).

  As shown in FIG. 2, four strain gauges 27 </ b> A corresponding to the “strain sensor” of the present invention are fixed to the plate portion 24 of the pressure receiving member 23 on a flat surface facing the opposite side of the flame extinguishing device 12. Yes. These strain gauges 27 </ b> A are arranged side by side at the same position in the longitudinal direction of the plate portion 24. As described above, in this embodiment, since the strain gauge 27A is attached to the outer surface of the pressure receiving member 23 attached to the gun 10, the attaching operation becomes easier than before, and the manufacturing cost can be reduced.

  On the outer peripheral surface of the base end side cylindrical portion 25, an electric wire receiving groove 25A is formed at a portion facing the opposite side to the flame extinguishing and retreating device 12. The electric wire accommodation groove 25A extends in the axial direction of the base end side cylindrical portion 25, and the electric wire of the strain gauge 27A is accommodated therein and introduced into the data processing unit 28 described below. In addition, a resin (not shown) is molded on the plate portion 24 so as to cover the strain sensor 27 </ b> A, and the outside is covered with a cover 50. The cover 50 has a cylindrical shape, and both end portions thereof are fitted to the proximal end side columnar portion 25 and the distal end side columnar portion 26 to cover the entire plate portion 24.

  A data processing unit 28 is attached to the rear end surface of the bracket 21. As shown in FIG. 3, the data processing unit 28 includes a button battery 30, a circuit board 31, and the like inside a case 29. The case 29 has a structure in which a flange 29F protrudes laterally from one end of the cylindrical body, is disposed concentrically with the pressure receiving member 23, and is fixed to the bracket 21 with a screw penetrating the flange 29F.

  As shown in FIG. 4, a gauge connection circuit 32, an amplifier 33, a rectifier circuit 34, a comparator 35, and a microcomputer 36 are mounted on the circuit board 31. Four strain gauges 27A are bridge-connected to the gauge connection circuit 32, and the strain detection unit 27 according to the present invention is configured by the gauge connection circuit 32 and the strain gauge 27A. When the resistance value of the strain gauge 27 </ b> A changes according to the strain of the pressure receiving member 23, the output voltage of the gauge connection circuit 32 changes, and this is output as the output wave of the strain detection unit 27 through the amplifier 33 and the rectifier circuit 34. Is taken in. The comparator 35 compares the level of the output wave of the distortion detector 27 with a predetermined reference value. When the level of the output wave of the distortion detector 27 is equal to or higher than a predetermined reference value, the output of the comparator 35 becomes H level, and when not, the output of the comparator 35 becomes L level. Here, the predetermined reference value described above is obtained by actually measuring the output wave of the distortion detection unit 27 when the pressure receiving member 23 is distorted by receiving the bullet firing gas pressure, and the distortion detection unit with the bullet firing gas pressure as a factor. The 27 output waves are set so as to surely exceed the predetermined reference value and the output waves of the distortion detector 27 due to other factors do not exceed the predetermined reference value.

  The output of the rectifier circuit 34 is taken into the microcomputer 36. The microcomputer 36 is a package of CPU, RAM, and ROM, executes a signal processing program stored in the ROM, and increments the counter every time the output of the comparator 35 is inverted from L level to H level. Thereby, the output wave more than a predetermined reference value among the output waves of the distortion detector 27 is counted as the number of fired bullets. In the present embodiment, the comparator 35 and the microcomputer 36 constitute a counting unit 37 according to the present invention.

  The microcomputer 36 includes a wireless circuit 38 corresponding to the “data output unit” of the present invention. Through this wireless circuit 38, the microcomputer 36 wirelessly outputs the counter value (that is, the result of counting the number of shots) together with the identification data stored in the ROM. The data totaling device 40 shown in FIG. 4 can be wirelessly connected to the wireless circuit 38. Note that the bullet count device 20 of the present embodiment is configured to communicate wirelessly with an external device, thereby eliminating the need for a connector and facilitating waterproofing and dustproofing.

  The data counting device 40 includes a microcomputer 41 and a wireless circuit 42 that are packaged with a CPU, a RAM, and a ROM, as well as the shot number counting device 20, and includes a display unit 43, a data read switch SW1, and a reset switch SW2. I have. When the data reading switch SW1 is operated, the microcomputer 41 executes a data reading program stored in the ROM, and wirelessly outputs a data output command to each shot number counting device 20. Then, the microcomputer 36 of each shot number counting device 20 wirelessly outputs the counter value (that is, the counting result of the number of shot bullets) together with the identification data stored in the ROM, and the data totaling device 40 wirelessly receives this. Further, when the reset switch SW2 is operated, the microcomputer 41 executes a reset program stored in the ROM, and wirelessly outputs a data reset command to each shot number counting device 20. Then, the microcomputer 36 of each fire bullet number counting device 20 resets the value of the counter to zero. Here, a single data counting device 40 is provided for the plurality of shot number counting devices 20, and the used bullet number counting system 44 according to the present invention is constituted by the shot number counting device 20 and the data counting device 40. Has been. In addition, a personal computer 45 is connected to the data totaling device 40, and data from each shot number counting device 20 is also taken into the personal computer 45 via the data totaling device 40.

  Next, the operation of the present embodiment configured as described above will be described. When a shooting exercise is performed using a plurality of guns 10, a shot number counting device 20 is attached to each gun 10. At this time, the reset switch SW2 of the data totaling device 40 is operated to reset the counters of the respective shot number counting devices 20 to “0”.

  Each time a bullet is fired by each gun 10 during shooting practice, the bullet firing gas is discharged from the gas discharge hole 13 of the flame extinguishing device 12 to the side, and the pressure receiving member 23 is distorted due to the pressure of the bullet firing gas. . At this time, the distortion of the pressure receiving member 23 is detected by the distortion sensor 27A, the output of the distortion detection unit 27 becomes a waveform, and the counting unit 37 counts the output wave of the distortion detection unit 27 as the number of shots. As described above, according to the shot number counting device 20 of the present embodiment, the number of shot bullets of the gun 10 other than the automatic loading type can be counted as long as the gun 10 includes the flame extinguishing and retracting device 12. Further, the pressure receiving member 23 is also distorted when it abuts against a protective wall or the ground during the exercise. However, the output wave of the distortion detector 27 in this case does not exceed the reference value, and this output wave is not counted as the number of fired bullets. Further, the strain gauge 27A is attached to the pressure receiving member 23 separated from the barrel 11 and the flame extinguishing device 12, and is disposed on the surface facing away from the flame extinguishing device 12, so that the gun 10 is fired by firing. Even if heat is generated, the influence of heat on the strain gauge 27A can be suppressed. Thereby, the reliability (durability) of the shot number counting device 20 can be improved and used repeatedly over and over. In addition, since the bullet number counting device 20 receives the bullet firing gas discharged from the flame extinguishing device 12 outside the flame extinguishing device 12, the function of the flame extinguishing device 12 is not disturbed.

  When the shooting exercise is completed, the number-of-shots counting device 20 together with each gun 10 is collected in the vicinity of the data counting device 40. Then, by operating the data reading switch SW1, the identification data of each fire bullet number counting device 20 and the value of the counter (that is, the result of counting the number of shot bullets) are taken into the data counting device 40. Then, the microcomputer 41 of the data totaling device 40 displays the number of shots for each shot number counting device 20 on the display unit 43 and adds the number of shots of all the shot number counting devices 20. The number is also displayed. Thereby, the number of bullets used in the shooting exercise can be easily known, and management of the bullets becomes easy. In addition, data acquired by the data counting device 40 from the plurality of projecting bullet count devices 20 can be taken into the personal computer 45 for more detailed management. Also, resetting the counter of the fire bullet number counting device 20 is performed by operating the data counting device 40, and the fire bullet number counting device 20 is not provided with an operation unit, so that highly reliable count data is acquired. Can be managed easily.

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

  (1) In the above embodiment, the bracket 21 dedicated to the pressure receiving member 23 is attached to the barrel 11, but the pressure receiving member is attached to the bayonet mounting portion 60 (see FIG. 3) for mounting the bayonet to the gun 10. Also good.

  (2) Although the pressure receiving member 23 of the above embodiment has a cantilever structure, the pressure receiving member may have a double-supported beam structure.

  (3) You may provide the display part for displaying a count result on the outer surface of the data processing part 28 among the shot number counting devices 20 of the said embodiment.

  (4) In the above-described embodiment, each of the projectile counting devices 20 is wirelessly connected to the data counting device 40, but may be configured to be connected in a line with a USB cable or the like.

  (5) The data totaling apparatus according to the present invention may be configured by a personal computer equipped with, for example, a wireless module, an infrared communication module, and the like. The personal computer may be provided with a database that associates the identification data of each shot number counting device with the user of each gun, and the user name of each gun and the number of shots may be displayed in correspondence with each other. In addition, the number of ammunition supplied for each gun before the shooting exercise is input to the data totaling device in advance and reflected in the database. After the shooting exercise is completed, the counting result is taken from the shooting ammunition counting device of each gun and unused. The bullets may be managed by receiving the bullets and inputting the number of the bullets into the data counting device.

  (6) In the embodiment, the strain gauge 27A is provided as the strain sensor according to the present invention. However, for example, a piezoelectric element may be provided as the strain sensor.

Side view of a gun according to an embodiment of the present invention Perspective view of the projectile counting device attached to the barrel The plan view Block diagram showing the configuration of the counting unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gun 11 Barrel 12 Flame extinguishing device 13 Gas discharge hole 15 Positioning pin 20 Firing bullet number counting device 21 Bracket 23 Pressure receiving member 24 Plate part 25, 26 Cylindrical part 26A Pin hole 27 Strain detection part 27A Strain gauge (strain sensor)
37 Counting unit 38 Wireless circuit (data output unit)
40 data totaling device 42 wireless circuit 43 display unit 44 ammunition number totaling system 50 cover

Claims (12)

A pressure-receiving member that is externally attached to the gun in a state of facing the extinguishing device of the gun from the side, and is distorted by receiving the bullet firing gas pressure from the extinguishing device,
A strain detection unit that has a strain sensor fixed to the pressure receiving member, and detects strain of the pressure receiving member due to the bullet firing gas pressure;
A fired bullet number counting device, comprising: a counting unit that counts the output wave of the distortion detection unit as the number of fired bullets.   The fire bullet count device according to claim 1, wherein the strain sensor is disposed on a surface of the pressure receiving member facing away from the flame extinguishing device. A bracket fixed to the barrel and protruding laterally from the barrel,
The pressure receiving member has a cantilever structure extending from the bracket,
3. The shot number counting device according to claim 1, wherein the strain sensor is disposed on a base end side from a position of the pressure receiving member that receives the bullet firing gas pressure. 4.   The fire bullet number counting device according to claim 3, wherein a bayonet mounting portion for mounting a bayonet on the gun is also used as the bracket.   The firing bullet number counting device according to claim 3 or 4, wherein the counting portion is fixed to the bracket. The pressure receiving member has a structure having cylindrical portions at both ends of the plate portion,
The fire bullet number counting device according to any one of claims 1 to 5, further comprising a cylindrical cover that is fitted to both the column portions and covers the plate portion from the side.   The pressure receiving member is provided with a positioning pin that is coaxially formed with a gas discharge hole opened on a side surface of the flame extinguishing / retreating device and is inserted in common with the gas discharge hole and the pin hole. The fire bullet number counting device according to any one of claims 1 to 6.   The counting unit according to any one of claims 1 to 7, wherein the counting unit counts only an output wave of a predetermined reference value or more among the output waves of the distortion detection unit as the number of projecting bullets. apparatus.   9. The fire bullet number counting device according to claim 1, further comprising a data output unit capable of outputting a count result by the counting unit to a line or a radio.   10. The fire bullet number counting device according to claim 9, wherein the data output unit is configured to output identification data for identifying the shot number counting devices together with the counting result.   The fire bullet number counting device according to claim 9 or 10, further comprising a display unit connected to the data output unit to display the counting result. The number of bullets used comprising the plurality of projectile counting devices according to any one of claims 1 to 11 and a data counting device that acquires and counts the counting results from the plurality of projectile counting devices. Aggregation system.

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