JPH0420799A - Mine avoiding practice device - Google Patents

Abstract

PURPOSE:To securely inform observers and operators of vehicles of a fact of their passage in the case where they pass through a point not permitted to pass through by a method wherein once press force is applied in a piston in a set state where a flange part and a groove of a looking pawl are fitted to each other, the piston pushes and expands the locking pawl to release the engagement and hence an alarm is generated from a generation part in the piston. CONSTITUTION:In a non-set state a flange part 5 and a locking pawl 3 are separated and a piston 4 is pushed up by a push-up spring 7 and the upper part of the piston 4 is protruded. For setting a phantom mine 22, the piston 4 may simply be pushed down. In the case a vehicle is placed on the upper part of the piston 4 and predetermined or more press-down force is applied to the piston 4, the piston 4 is pushed down against the push-up spring 7 and a pressure sensitive spring 8, and a switch 9 makes contact with the bottom surface of a casing 2 for operation of the switch 9 power is supplied from a power source to an alarm generation part 10 to drive the alarm part 10.

Description

[Detailed Description of the Invention] "Industrial Field of Use The present invention is for use in exercises that display the fact that when a moving body such as a vehicle passes through the surface of the earth at the point where it is buried underground, it is buried underground. Concerning simulated landmines.

[Conventional technology] When vehicles are operated during military exercises, they are trained to avoid passing through points believed to be buried landmines, or they are objectively checked to see if they have passed through points that they should not have passed through. There was nothing to do.

[Invention or problem to be solved] In view of the above-mentioned circumstances, the present invention provides a system that, when passing through a point that should not be passed, allows an observer, a vehicle operator, etc. The purpose of this project is to provide a landmine navigation training device with

5 Means for Solving the Problems 1 The present invention provides a case in which a flange is formed at the lower end of a case that can be buried in the ground, and a piston having an alarm generating section inside which generates an alarm by the vertical movement of the piston is mounted in a vertical direction. A locking pawl is provided on the bottom of the case so as to be slidable in the radial direction, and the locking pawl is biased toward the center. A groove that can be engaged with the flange is formed in the flange, and a slope is formed on either the lower side of the flange or the periphery of the lower surface of the flange, so that when the piston descends, the lock pawl retreats and the flange and the flange are engaged with each other. a locking hole that can be engaged or released, and a locking hole is bored in the lower surface of the locking claw;
A locking ball is provided at the bottom of the piston and is biased upward so that the locking ball can be fitted into the locking hole in the disengaged position of the pawl, and the locking pawl is forced to return toward the center from outside the case. It is characterized by being constructed in such a way that it can give strength.

1 Action 1 The state in which the flange and the locking pawl are fitted together is the set state, and if a pushing force is applied to the piston in this state, the piston or locking pawl will be pushed apart and the engagement will be released. At the same time, the disengaged state of the locking pawl is maintained by the engagement between the locking hole and the locking ball. When the pushing force on the piston is removed, the piston rises due to the spring, and an alarm is issued from the alarm generator inside the piston.

When resetting the piston, a force is applied to the locking pawl in the direction of disengaging the locking pawl to return the locking pawl to its original position.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 6, the simulated landmine 22 according to this embodiment is mainly buried underground, and when a vehicle 23 passes over the buried simulated landmine 22, the simulated landmine 22 is The weight of the vehicle 23 is sensed, and after the vehicle 23 passes, an alarm signal such as light or sound is emitted.

The configuration of this embodiment will be described in detail below with reference to FIG.

A locking pawl 3 is provided at the bottom of a hollow cylindrical case 2 having an open cylindrical portion 1 at the top so as to be expandable and retractable in the radial direction. The piston 4 is slidably fitted. The piston 4 is formed with a flange 5 having a tapered lower edge, and a groove 6 is carved in the center @ side surface of the locking pawl 3 so that the peripheral end of the flange 5 can engage. Furthermore, the line groove 6 consists of an eave part 11 with a chamfered E surface and a slope 12 facing the eave part 11, and the inner* (case center side) surface of the eave part 11 is closer to the lower end of the slope 12. It is also recessed outward by the required dimension.

Further, a conical hole 14 into which a locking ball 15, which will be described later, fits is bored in the lower surface of the locking pawl 3.

The locking pawl 3 is guided by a guide block 16 so as to move forward and backward in the radial direction, and a return spring 18 provided between the locking pawl 3 and a spring receiver 17 fixed to the block 16 The claw 3 is biased toward the center.

A push-up spring 7 for causing the piston 4 to protrude from the case 2 and a pressure-sensitive spring 8 having a required initial repulsive force are provided between the lower surface of the piston 4 and the bottom surface of the case 2.

A conical hole 14 is formed in the bottom surface of the case 2 so as to match the trajectory of the conical hole 14 when the locking pawl 3 advances and retreats, and the locking ball 15 is loosely fitted into the conical hole 14. Furthermore, a locking spring 19 is provided which urges the locking ball 15 upward.

Further, a reset hole 20 is bored in the peripheral wall of the case 2 at a position facing the locking pawl 3.

An alarm generating section 10 that emits sound and light is provided inside the piston 4, and the alarm generating section 10 includes the piston 4.
Power is supplied from a power source (not shown) by actuating a switch 9 provided on the bottom surface of the device.

FIG. 1 shows the state of the simulated landmine 22 according to this embodiment before setting, and FIG. 3 shows the set state.

In the non-set state, the flange 5 and locking pawl 3 are separated,
The piston 4 is pushed up by the push-up spring 7, and the upper part of the piston 4 protrudes.

To set the simulated mine 22, it is sufficient to simply push the piston 4 downward.

When the piston 4 is pushed down, the tapered lower peripheral edge of the flange portion 5 and the upper chamfered portion of the eave portion 11 first come into contact with each other, and when the piston 4 is further pushed down, the locking pawl 3 is pressed down due to the wedge effect.
are pushed outward against the return spring 18.

When the outer peripheral surface of the flange 5 passes over the inner end surface of the eaves section 11, the locking pawl 3 is returned by the return spring 18, the flange 5 is fitted into the groove 6, and the flange 5 and the locking pawl are 3 are in an engaged state (see FIG. 3).

In the engaged state, there is a gap between the lower surface of the piston 4 and the bottom surface of the case 2, and the switch 9 is not in contact with the bottom surface of the case.

Further, the conical hole 14 provided on the lower surface of the locking claw 3
does not reach the locking ball 15, and the conical hole 14 and the locking ball 15
are not mated.

The pressure sensitive spring 8 allows the piston 4 to move downward from this set state only when a further downward force of a predetermined value or more is applied to the piston 4.

Now, when a vehicle is mounted above the piston 4 and a depressing force of more than a predetermined value is applied to the piston 4, the piston 4 is pressed down against the push-up spring 7 and the pressure-sensitive spring 8, and the switch 9 It operates by touching the bottom of case 2. Furthermore, in the process of lowering the piston 4, the locking pawl 3 is pushed outward due to the imitation between the conical surface of the flange 5 and the slope 12, and the lower end of the slope 12 is further extended from the inner end surface of the eave part 11. The locking claw 3 is pushed out to the inner state until the flange 5 and the opening 6 do not engage with each other, and the conical hole 14 and the locking ball fit together, locking the locking pawl 3 in the extended state (fourth (see figure).

When the vehicle passes and the pushing force on the piston 4 is removed,
The piston 4 is pushed upward by the repulsive force of the push-up spring 7, and the upper end of the piston 4 protrudes from the ground surface.

By operating the switch 9, power is supplied from a power supply section (not shown) to the alarm generating section 10, and the alarm section 10 is driven. Light and/or sound is emitted from the protruding piston 4, and the observer recognizes that the vehicle has passed over the simulated mine.

Once the simulated mine 22 is activated, the locking ball 1 is activated as described above.
5 and the conical hole 14 are fitted, and the locking pawl 3 is inserted into the flange 5.
It remains retracted to a position where it does not engage.

To use this simulated landmine 22 again, all you have to do is take out the simulated landmine 22, insert a metal rod or a tool driver, etc. into the reset hole 20, and forcefully push in the locking claw 3. By applying a force toward the center of the pawl 3, the locking ball 15 comes out of the conical hole 14, and the return spring 18 returns the locking pawl 3 to a position where it can engage with the flange 5.

The state in which this locking claw 3 has returned is the second state as described above.
As shown in the figure.

Furthermore, when performing maintenance or inspection of the piston 4 itself or the alarm generating section 10 built into the piston 4, the cap 1
3 and take out the piston 4.

Further, the lock between the conical hole 14 and the locking ball 15 may be released by providing a lever or the like on the case 2 itself, and applying a force toward the center of the locking pawl 3 by operating the lever.

Further, as a recognition means for issuing an alarm, in addition to the above-mentioned light and sound, radio waves or smoke may be used, and furthermore, these recognition means may be arbitrarily combined.
It is possible to omit it, or if a pressure sensitive spring 8 is provided and the set pressure of the pressure sensitive spring 8 is adjusted to the weight of the object to be passed, it will work even if a person walks on the simulated landmine 22. It is convenient and easy to handle.

[Effects of the Invention] As described above, according to the present invention, by setting a point at a point that a vehicle, etc. is not allowed to pass, when a vehicle, etc. passes that point, a warning is issued and alerts observers, vehicle operators, etc. This has the excellent effect of being able to reliably recognize the fact that the vehicle has passed through the display using a display or the like, and that it can be easily reset after the operation is completed.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing one embodiment of the present invention, Figures 2 and 3 are
FIG. 4, FIG. 5 is an explanatory diagram of the operation of this embodiment, and FIG. 6 is an explanatory diagram showing an outline of a simulated landmine.

Claims (1)

[Claims] 1) A case that can be buried underground is provided with a piston having a flange formed at the lower end and an alarm generating section inside which generates an alarm by the vertical movement of the piston, which can be moved in and out in the vertical direction, and the piston is secured by a spring. A locking pawl is provided on the bottom of the case so as to be slidable in the radial direction, and the locking pawl is urged toward the center, and the locking pawl is provided with a groove capable of engaging with the flange. At the same time, a slope is formed on either the lower side of the groove or the periphery of the lower surface of the flange, so that when the piston descends, the lock pawl retreats and the engagement between the flange and the groove is released. A locking hole is formed in the lower surface of the claw, and a locking ball is provided in the bottom of the piston and is urged upward so that the locking ball can fit into the locking hole when the locking claw is in the disengaged position. A simulated landmine for training, characterized in that the locking claw is configured to be able to apply a forcing force to return toward the center.