JP3481082B2 - Remote blast method and remote blast device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention deploys (lays) a lightweight fuel tube having a metal foil film such as an aluminum foil film attached to its inner surface by means of a projection device, and then causes an artificial avalanche by an explosion. The present invention relates to a remote blasting method and a remote blasting device that are used to blow or to obstruct obstacles such as rocks.

[0002]

2. Description of the Related Art For example, as a method for causing an artificial avalanche, there are a mechanical method and a method using gunpowder. Among them, the mechanical method is a method in which a snow pip on the upper part of the snow is dropped to stimulate the snow surface or a person manually stacks the snow to cause an avalanche.

Further, methods of using explosives include a direct blasting method and a remote blasting method. The direct blasting method is a method in which a person climbs on a slope trying to cause an avalanche, punches it, loads explosives and blasts it, and is generally used in Japan. The remote blasting method is a method in which an explosive body is shot by a projector onto a slope where an avalanche is likely to occur, and explodes to cause an avalanche.

[0004]

According to the above-mentioned prior art, the mechanical method and the direct blasting method have a high risk that a natural avalanche will occur during the preparatory work and the operator will be caught in the avalanche. In addition, there is a case where the worker cannot access because the risk is too high and the worker cannot access.

In the remote blasting method, it is difficult to generate an artificial avalanche as planned due to the projection accuracy. In other words, the remote blasting method requires multiple shots of explosives with a small amount of charge, for example, to shoot linearly along snowflakes, so whether or not an artificial avalanche can be generated as planned is highly dependent on projection accuracy. It depends. In addition, the price of explosives is high and the economy is poor. A delayed ignition device is used to detonate the explosive body.

Therefore, the invention of claim 1 of the present invention is intended to provide a remote blasting method which can be easily deployed and exploded even in a place or area where an operator cannot approach. is there.

Further, the invention according to claim 5 is to provide a remote blasting device capable of easily, reliably and economically realizing an explosion as planned.

[0008]

In order to achieve the above-mentioned object, in the remote blasting method according to claim 1 of the present invention, a fuel tube having a metal foil film adhered to its inner surface is used as a projection device. After deploying through a projectile ejected by, the fuel is injected into the fuel tube, and the fuel is ignited to explode.

Therefore, according to the first aspect of the present invention, by using the fuel tube having the metal foil film attached to the inner surface, the detonation propagation property can be improved and the tube diameter can be reduced to reduce the weight. Therefore, the device can be made compact and the transportation can be easily performed. Further, the deployment via the projectile emitted by the projection device can be easily performed from a remote location to a place or area where an operator cannot approach. Moreover, since the fuel tube is used, the fuel can be laid linearly along the planned cutting line.

According to a second aspect of the present invention, in the remote blasting method according to the first aspect of the present invention, the fuel tube is connected to the projectile side with the portion where the electric detonator is attached as a boundary and the metal foil. It is characterized in that it is divided into a projecting body side tube portion having a film attached to the inner surface thereof and a fuel supply device side tube portion connected to the fuel supply device side and having no metal foil film attached thereto. .

Therefore, according to the second aspect of the present invention, the tube portion on the projectile side can facilitate detonation propagation and can reduce the limit drug diameter. Moreover, in the tube portion on the fuel supply device side where the metal foil film is not applied. , The detonation is difficult to propagate and the explosion is
By creating this non-explosion area, the fuel supply device side will not be damaged by the effect of the explosion.

The remote bombardment method according to claim 3 of the present invention is the method according to claim 1, wherein the fuel is
It is characterized in that it is in the form of a liquid or foam in which a flame-retardant substance, or a bubble-containing material and a thickening agent are mixed based on the flame-retardant substance.

Therefore, according to the third aspect of the invention, as the fuel, one having improved detonation sensitivity and detonation propagation can be used. Furthermore, the remote blasting method according to claim 4 of the present invention is characterized in that, in the configuration according to claim 3 described above, the flame-retardant substance is nitromethane.

Therefore, according to the invention of claim 4, since nitromethane having low explosiveness is used, the handling safety is enhanced. According to a fifth aspect of the present invention, in a remote blasting apparatus, a projection device having a launching barrel, a projecting body loaded in the launching barrel and having expandable wings, and a projecting body which is housed in the projecting body and is launched. And a fuel supply device for injecting liquid or foamy fuel into the expanded fuel tube, and a metal foil film is attached to the inner surface of the fuel tube. It is characterized by that.

Therefore, according to the invention of claim 5, the projecting member is loaded into the projecting barrel of the projecting device, and then the projecting member is fired so that the operator cannot approach the fuel tube contained in the projecting member. It can be easily deployed remotely to locations and areas, and in the deployed fuel tube,
By injecting liquid or foamy fuel with the fuel supply device and then igniting the fuel, a linear explosion can be performed as planned.

A remote blasting apparatus according to a sixth aspect of the present invention is characterized in that, in the above-mentioned configuration of the fifth aspect, the fuel supply apparatus is a pump pressure type. Therefore, according to the invention of claim 6, the fuel can be sufficiently and reliably supplied by pumping.

Further, a remote blasting apparatus according to a seventh aspect of the present invention is characterized in that, in the above-mentioned configuration of the fifth aspect, the fuel supply device is an air pressure type.
Therefore, according to the invention of claim 7, the weight can be made simpler and lighter than the pump type.

Further, in the remote blast device according to claim 8 of the present invention, in the structure according to claim 5 described above, a braking cable is provided over the entire length of the fuel tube, and a free end portion of the braking cable is provided. It is characterized in that it is connected to a suspension cable support frame, and the tip portion of the suspension cable is connected to a projecting body.

Therefore, according to the invention of claim 8, when the fuel tube is pulled out from the projectile, the tension thereof is applied to the braking rope. As a result, when a strong wind is blowing at the time of launch, the fuel tube is used. The tube can be pulled out in a state of fluttering with the braking rope side on the windward side, and in a state in which it is hardly affected by the wind. Then, the fuel tube is dropped by setting the braking cable as a lower layer and increasing the speed by the weight of the braking cable, that is, shortening the time affected by the wind.

According to a ninth aspect of the present invention, in the remote blasting apparatus according to the fifth aspect, the connecting portion between the tip portion of the fuel tube and the projectile has a value equal to or more than a set value on the fuel tube side. It is characterized by being separated when the tension of is applied.

Therefore, according to the ninth aspect of the present invention, even if the projectile hits the ground and jumps or falls depending on the landing posture or the landform at the landing point, there is nothing on the separated fuel tube side. It will have no effect and the fuel tube can be laid without twisting or cutting.

Further, a remote blasting apparatus according to a tenth aspect of the present invention is characterized in that, in the configuration of the above-mentioned fifth aspect, an igniter utilizing high-voltage discharge energy is used to ignite fuel. It is what

Therefore, according to the tenth aspect of the invention, there are fewer restrictions on handling as compared with the case of using an ignition device such as an electric detonator using explosive.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 and FIG. 2, a compressed air type projection device 1 is configured such that a launching barrel 2, an air storage unit repelling device 3 and an air storage unit 4 are integrated, and a pedestal 5 is mounted via the air storage unit repelling device 3. The positioning device 6 is provided on the gantry 5 while being installed on the top. An air cylinder 48 is connected to the air storage unit 4 via a charging hose 7, and a pilot air hose 9 is branched via a pilot air control valve 8 provided in the middle of the charging hose 7. Is connected to the air storage unit 4.

As shown in FIGS. 1 to 4, the projectile 10 projected by the compressed air type projection apparatus 1 comprises a tip cover 11, a front wing storage section 12, a body section 13, and a rear lid 14. The front cover 11 and the front wing storage section 1 are composed of parts.
The front wing storage portion 12 and the body portion 13 are connected to each other by a screw structure.

The tip cover 11 is made of a resin such as plastic and is formed so as to be crushed by an impact when it hits a tree or the ground. And the tip cover 11
An arrowhead body 15 is provided inside, and when the tip cover 11 is crushed by an impact, the arrowhead body 15 pierces a tree or the ground to serve as an anchor.

The four (plural) front wings 16 provided in the front wing storage section 12 are foldable so that they can be stored in the front wing storage section 12. That is, as shown in FIGS. 1 to 7, support shafts 18 in the left-right direction, the up-down direction, and the like are provided at four locations inside the front wing storage unit 12 via brackets 17 and the like, and the support shafts 18 are provided in front of each other. The base end of the blade 16 is swingably supported. A slit 19 is formed in the front wing storage portion 12 for expanding and swinging the front wing 16 stored in the front wing storage portion 12, and a spring 20 for urging the swing is provided at a portion of the support shaft 18. It is installed in.
The front wing 16 also serves as a gripping device, so that the free end side of the front wing 16 has a notch 21 for gripping the ground or the like.
Are formed.

The four (a plurality of) rear wings 22 provided at the rear of the body 13 are foldable along the outer surface of the body 13. That is, FIG.
As shown in FIGS. 5, 8 and 9, support shafts 24 in the front-rear direction are provided via brackets 23 and the like at four locations on the outer periphery of the body portion 13, and these support shafts 24 support the rear wing 22. The base end is swingably supported. These rear wings 22 are the body part 13
Is formed in a circular arc plate shape so as to closely follow the outer surface of, and a spring 25 is provided at a portion of the support shaft 24 in order to deploy and swing the rear blade 22. These rear blades 22 also serve as a gripping device.

The rear lid 14 serves to prevent compressed air from leaking between the projecting body 10 and the launch tube 2 to the outside when the projecting body 10 is fired, and an O-ring 26 as a packing. Is provided. And the rear lid 14
After the projectile 10 is fired, it is configured to naturally come off due to air resistance.

A fuel tube 30 is provided in the projectile 10.
Is paid. This fuel tube 30 is shown in FIGS.
As shown in FIG. 0 and FIG. 11, the elongated projecting body side tube portion 30A connected to the projecting body 10 side and the fuel supply device (described later) side are connected to each other with the portion where the electric detonator 33 is attached as a boundary. And a short fuel supply device side tube portion 30B. Here, the projecting body side tube portion 30A has a metal foil film 3 such as an aluminum foil film on the inner surface of an outer skin 31 made of a fiber base cloth for strength (ultra high molecular weight polyethylene) or the like.
The fuel supply device side tube portion 30B is formed by only an outer skin (without a metal foil film) made of a fiber fabric for strength or the like. Then, the fuel tube 30 is folded to have a width that fits in the cylinder, and the body portion 1
It is stored in 3.

A connector 34 is provided at the free end of the fuel supply device side tube portion 30B of the fuel tube 30, and the free end portion of the fuel supply device side tube portion 30B is provided with a braking cable 35 and the like. It is connected to the mooring stand 36. Here, the portion of the braking rope 35 that enters the inside of the cylinder is coated with resin or the like so that the braking rope 35 does not become a dumpling or entangle.

As shown in FIG. 11, a fuel supply device 40 for injecting fuel into the fuel tube 30 is provided. The fuel supply device 40 includes a fuel injection pump 41.
A fuel tank 42 connected to the suction side of the fuel injection pump 41, a supply hose 43 connected to the discharge side of the fuel injection pump 41, and a connector 44 provided at the free end of the supply hose 43. Composed. An igniter 46 connected to the electric detonator 33 via an ignition busbar 45 is provided.

The operation of the above-described first embodiment will be described below. First, the compressed air type projection device 1 is installed. That is, the gantry 5 is installed with the launch tube 2 oriented in a desired direction, and then positioned by the positioning device 6. Next, the charging hose 7 connected to the gas storage unit 4 is connected to the air cylinder 48. In this state, the compressed air from the air cylinder 48 is injected into the air storage section 4 via the charging hose 7, whereby the compressed air is stored in the air storage section 4. After the compressed air is injected in this way, the air cylinder 48 is connected to the pilot air hose 9 side by switching the pilot air control valve 8.

Subsequently, the braking cradle 36 is fixed to the ground slightly in front of the compressed air type projection device 1, and the rear lid 14 is attached.
The projectile 10 with the lid is loaded from the front side into the firing tube 2 of the compressed air type projection apparatus 1. After loading, by opening the pilot air control valve 8 by remote control,
The compressed air stored in the air storage unit 4 is released at once,
As a result, a strong projection force is generated and the projectile 10 is launched.

At this time, after the projectile 10 is fired, the rear lid 14
When the projectile 10 comes out of the launch tube 2, the front wing 16 and the rear wing 22 are automatically expanded by the elastic forces of the springs 20 and 25, respectively, and the projectile 10 is further inside (inside the body). It is flown while pulling out (deploying) the fuel tube 30 stored in. This causes the projectile 10 to fly near the ground with a small head, and to fly without being caught by obstacles such as undergrowth and branches, so that the fuel tube 30 is linear along, for example, a snow plow. Is laid (deployed) in.

After the fuel tube 30 is laid in this way, the fuel tube 30 is removed from the braking cable 35, and the connector 34 is reconnected to the connector 44 on the fuel supply device 40 side. After the connection is changed, the fuel tank 4 is operated by operating the fuel injection pump 41.
The second fuel is injected into the fuel tube 30 via the supply hose 43 and the like. Here, the fuel is a liquid or foam, for example, based on only nitromethane belonging to Class 5 dangerous materials, and mixed with a thickening agent such as glass microballoons which are a bubble-containing material made of a film material that does not dissolve The one that has improved detonation sensitivity and detonation propagation is used.

After the fuel tube 30 is filled with the fuel, the gel-like non-explosive liquid is injected.
Make sure that the impact of the explosion does not reach the fuel supply device 40 side. After that, the fuel is ignited by operating the igniter 46 by remote control to ignite the electric detonator 33.
Therefore, an artificial avalanche is generated due to a linear explosion.

At this time, in the projectile-side tube portion 30A on which the metal foil film 32 is applied, the metal foil film 32 improves the detonation propagation property of the fuel and facilitates the detonation propagation. The drug diameter can be reduced. However, the metal foil film 3
In the tube portion 30B on the fuel supply device side where 2 is not installed, if the same drug diameter is used, detonation is difficult to propagate and conversely no explosion occurs.
By utilizing this, the fuel supply device 4 from the portion of the electric detonator 33
The explosion on the 0 side is prevented, and the fuel injection pump 41 and the fuel tank 42 are prevented from being damaged due to the explosion.

In the above-described first embodiment, the compressed air projection device 1 is shown as the projection device, but this may be another type. In the above-described first embodiment, the fuel is injected until the fuel tube 30 becomes full, and then the gel-like non-explosive liquid is injected, so that the impact at the time of explosion does not reach the fuel supply device 40 side. However, for example, when the fuel supply device-side tube portion 30B to which the metal foil film is not attached is made thinner than the limit drug diameter, detonation propagation can be reliably blocked, so that a gel-like non-explosion occurs. The ionic liquid can also make its injection (use) unnecessary.

In the above-described first embodiment, as the flame-retardant substance which is a fuel, only pure nitromethane belonging to the dangerous substance class 5 is used as a base, and a bubble-containing material made of a film material which does not dissolve in it is used. Liquids or foams are used that have improved detonation sensitivity and detonation propagation by mixing thick glass micro-balloons and other thickeners, but other flame-retardant substances are used for nitromethane. It is also possible to employ one kind or a mixture of plural kinds such as diethyl ether, pentane, butylamine and benzene.

In the above-described first embodiment, the pump pressure feed type fuel supply device 40 is used, but it may be an air pressure feed type fuel supply device. That is, FIG.
14 is a second embodiment and shows an air pressure type fuel supply device 50. The fuel supply device 50 includes a fuel tank 51 containing liquid fuel and an air cylinder 60 for pressure feeding.
Composed of etc. Here, the fuel tank 51 is of a three-stage stacking type (single-stage type or multiple-stage type), and each fuel tank 51 has an upper connecting portion 52 and a lower connecting portion 53.
And are provided. And in the stacked state,
The lower connection portion 53 of the upper fuel tank 51 and the upper connection portion 52 of the lower fuel tank 51 are connected by a relay hose 54.

The lower connection portion 53 of the fuel tank 51 at the lowermost stage
A non-explosive supply hose 55 made of a polyethylene laminate tube or the like is connected to the. A connection flange 56 is provided at the tip of the supply hose 55, and the fuel tube 30, that is, the completely explosive projectile-side tube portion 30A made of an aluminum laminate tube or the like is connectable to the connection flange 56. It The booster 57 provided on the connection flange 56 includes an electric detonator 3
3 is provided, and the electric detonator 33 is connected to an igniter 46 via an ignition bus 45. Top fuel tank 5
An air pressure feeding hose 61 from a pressure feeding air cylinder 60 is connected to the upper connection portion 52 of No. 1.

The fuel tank 51 is set on the frame 58,
Then, the fuel tank 51 group is stacked via the frame 58. A portable band 59 is provided on the uppermost fuel tank 51 side.
The fuel tank 51 can be carried or carried by using the portable band 59. Reference numeral 62 denotes an ejector in which an air cylinder 48, a pilot air control valve (not shown) and the like are set.

According to the second embodiment described above, the fuel supply device 50 is divided into a fuel tank 51 group and a pressure-feeding air cylinder 60, each of which is carried by a portable band 59 or the like and carried on site. When it is carried to the fuel supply and is supplied with fuel, it is installed at a predetermined position and then the pneumatic hose 6
Connected by 1. At this time, the pneumatic feed type fuel supply device 50 can be made simpler and lighter than the pump type, and thus can be easily carried by hand.

Similar to the first embodiment described above,
After the projectile 10 is fired by the compressed air projecting device 1 and the fuel tube 30 is laid, the fuel tube 30 is removed from the braking cable 35, and the connector 34
Is connected to the connection flange 56 on the fuel supply device 50 side, and the supply hose 55 is connected to the projecting body side tube portion 30A.
To connect. After such connection change, the compressed air in the air cylinder 60 for pressure feeding is press-fitted into the uppermost fuel tank 51 via the hose 61 for air pressure feeding.

Then, the air pressure applied to the uppermost fuel tank 51 is sequentially applied to the lower fuel tank 51, so that the explosive on the lowermost fuel tank 51 side is supplied to the fuel tube 30 via the supply hose 55 and the like. Injected inside. Here, the fuel is in a liquid state, and for example, only pure nitromethane belonging to Class 5 dangerous substances is used.

After the fuel tube 30 is filled with fuel, the igniter 46 is remotely operated.
Is activated to ignite the electric detonator 33, the fuel is ignited, and a linear explosion can be performed. At this time, the non-explosive property of the supply hose 55 is used to prevent the explosion from the connection flange 56 to the fuel supply device 50 side, and the fuel tank 51, the air cylinder 60 for pressure feeding, etc. are not broken by the influence of the explosion. I am trying.

According to the second embodiment described above, by directly applying the air pressure to the fuel in the uppermost fuel tank 51, the fuel in the fuel tank 51 group is gradually emptied from the upper stage to the lower stage. There is a risk that air bubbles will be mixed in the fuel in the process and explosion will be inconvenient. In such a case, the air pressure may be indirectly applied.

That is, FIG. 15 shows a third embodiment, in which each fuel tank 51 has a flexible partition wall 65 made of rubber or the like.
Is provided. An air branch pipe 66 is connected to the air pressure feed hose 61 from the pressure feed air cylinder 60, and a branch portion of the air branch pipe 66 is connected to the upper connection portion 52 of each fuel tank 51 via a branch hose 67. ing.
Further, the upper and lower fuel tanks 51 have lower connecting portions 53.
The spaces are connected by a relay hose 54. In each fuel tank 51, of the upper and lower chambers partitioned by the flexible partition wall 65, the lower chamber in which the lower connection portion 53 is formed is filled with fuel.

According to the third embodiment described above, the compressed air in the air cylinder 60 for pressure feeding is supplied by the hose 6 for air pressure feeding.
1, air branch pipe 66, one branch hose 67 selected
Via, for example, is press-fitted into the upper chamber of the uppermost fuel tank 51.

Then, due to the air pressure applied to the upper room,
The flexible partition wall 65 is pushed down to compress the fuel in the lower chamber, the fuel in the lower chamber is pressed into the lower chamber in the lower fuel tank 51, and the fuel in the lower fuel tank 51 is compressed. Are injected into the fuel tube 30 via the supply hose 55 and the like. As a result, when the fuel in the uppermost fuel tank 51 is emptied, the same pressure is applied to the next fuel tank 51 while maintaining the pressurized state on the uppermost fuel tank 51 side. .

As described above, according to the third embodiment, the fuel can be injected while the air pressure is indirectly applied to the fuel through the flexible partition wall 65. Therefore, there is no possibility that air bubbles are mixed in the fuel. No, the explosion is always good. A balloon type may be adopted instead of the flexible partition wall 65.

According to the above-mentioned first and second embodiments, the projecting body side tube portion 30A is shown as a pipe shape, but this tube shape may be various. That is, FIG. 16 shows a fourth embodiment, in which a mat-shaped projecting body side tube portion 70 is adopted. In this case, the projecting body side tube portion 70 may be folded so as to be easily deployed and stored in the body portion 13, or may be gathered outside the projecting body 10 and pulled by the projecting body 10 to be deployed. become.

According to the fourth embodiment, the width W of the expanded mat-shaped projecting body side tube portion 70
Bombardment of a wide range of planes is possible, and the blasting effect can be improved. In each of the above-described embodiments, the pipe-shaped projectile-side tube portion 30A and the mat-shaped projectile-side tube portion 70 are lightweight, and therefore, when the installation work is performed on a windy day, the projectile-side tube portions 30A, 70 are used. Will flow downwind and will be laid in a bow, and fuel cannot be laid along the planned line. In particular, it becomes remarkable in the case of the mat-shaped projecting body side tube portion 70. In such a case, a type that can be installed without being affected by wind is desired.

That is, FIG. 17 shows a fifth embodiment, in which a braking rope 76 is provided over the entire length on one side in the width direction of the mat-shaped projecting body side tube portion 75 constituting the fuel tube. Therefore, the weight of the projecting body side tube portion 75 is lost due to the presence of the braking cable 76. The free end portion of the braking rope 76 is connected to the braking rope supporting base 36, and the tip end portion of the braking rope 76 is connected to the projecting body 10.

According to the fifth embodiment, the projecting body side tube portion 75 is crushed into a tape shape, then folded into a bellows shape, and housed in the projecting body 10 in a compressed state. And after firing the projectile 10,
It is pulled out from the inside of the projectile 10 while eliminating the bellows shape, and is developed into a tape shape. At that time, the tension at the time of pulling out is applied to the braking rope 76. Therefore, for example, when the cross wind 77 is blowing at the time of launch, the weight balance of the projecting body side tube portion 75 is lost as described above, so that the projecting body side tube portion 75 is as shown by the solid line in FIG. Therefore, the braking rope 76 is pulled out in the windward state and is not easily influenced by the side wind 77.

Then, the drop of the projecting body side tube portion 75
As shown by the phantom line in FIG. 17, the braking rope 76 is set at a lower level and the speed is increased by the weight of the braking rope 76, that is, the time affected by the crosswind 77 is shortened. As a result, the projecting body side tube portion 75 is laid in a straight line, and the fuel can be laid along the planned line. In addition, the mat-shaped projecting body side tube portion 75
However, the same applies to the case of a pipe-shaped projecting body side tube portion.

In each of the above embodiments, the projectile 1
Depending on the attitude at the time of landing of 0 or the landform at the landing point, a situation may occur in which the projectile 10 that has landed once jumps or falls. In such a case, for example, if the tip portion of the pipe-shaped fuel tube 30 is fixed to the projectile 10, the fuel tube 30 may be twisted or cut, and such a situation is solved. A possible format is desired.

That is, FIGS. 18 and 19 show the sixth embodiment, in which one end of the connecting cable 80 is connected to the tip portion of the pipe-shaped fuel tube 30, and the other end of the connecting cable 80 is locked. It is connected to the tool 81. This locking tool 81
A pair of locking plates 83, 84 connected to each other via a pin 82 so as to be rotatable relative to each other, and a torsion spring provided at a portion of the pin 82 for urging the locking plates 83, 84 to rotate in the opening direction. 85 and a connecting body 86 provided on the locking plate 84 near the pin 82, and the other end of the connecting cable 80 is connected to the connecting body 86.

According to the sixth embodiment, when the fuel tube 30 is housed in the projecting body 10, the locking tool 81 is located at the back (the tip side of the projecting body 10).
At this time, in the locking tool 81, the elastically urging force of the torsion spring 85 causes the locking plates 83 and 84 to rotate in the opening direction, and each end is pressed against the inner surface of the body portion 13, whereby the projection body 10 side. Is locked to.

Then, by projecting the projectile 10,
The fuel tube 30 is pulled out from the projecting body 10 and deployed, and at that time, when the pulling-out approaches the end, the tension at the time of pulling out acts on the locking member 81, and this tensioning force is applied. When the pressure contact force of 81 is overcome, the locking tool 81 is pulled out from the inside of the projecting body 10. That is,
The connecting portion between the tip portion of the fuel tube 30 and the projectile 10 is automatically separated when a tension of a set value or more is applied to the fuel tube 30 side.

Therefore, depending on the attitude of the projectile at the time of landing or the landform at the landing point, even if the projectile 10 once lands and then jumps or falls, there is nothing on the side of the separated fuel tube 30. It has no effect. As a result, the fuel tube 30 can be laid without twisting or cutting, and the fuel can be laid along the planned line.

In the above-described sixth embodiment, the projectile 10 may fly to an unplanned distance after being separated from the fuel tube 30. For this, it is conceivable to provide the projecting body 10 with various speed reducers.

That is, FIG. 20 shows a seventh embodiment, in which the inside of the projecting body 10 is deeper than the locking tool 81 (projecting body 1).
A parachute (an example of a speed reducer) 87 is provided on the front end side of 0. The suspension line 87A of the parachute 87 is connected to the projectile 10 via the connection line 88, and the main umbrella 8
7B is connected to the locking tool 81 via a connecting cable 89. At that time, the connecting portion C between the main umbrella 87B and the connecting cord 89
Is configured to be automatically cut off when a tension equal to or higher than a set value is applied to the fuel tube 30 side.

According to the seventh embodiment, the projectile 1
When 0 is fired, the fuel tube 30 causes the projectile 1
When it is pulled out from 0 and deployed, and when the drawer approaches the end, the tension at the time of withdrawal acts on the locking tool 81, and this tension overcomes the pressure contact force of the locking tool 81. 81 is pulled out from the inside of the projectile 10, and the parachute 87 is further pulled out and opened (state of FIG. 20).

Then, the connecting portion C between the main umbrella 87B and the connecting cord 89 is automatically disconnected when a tension of a set value or more is applied to the fuel tube 30 side.
The fuel tube 30 is laid without twisting or cutting so that the fuel can be laid along the planned line.
The projectile 10 separated from the fuel tube 30 side
Is slowed down by opening the parachute 87, and landed nearby without flying far away unscheduled.

Next, FIG. 21 shows the eighth embodiment of the present invention.
It will be described based on. In this eighth embodiment, an ignition device 90 utilizing high-voltage discharge energy is used to ignite fuel. That is, the ignition device 90
Has a pair of electrodes 92 held by a holding member 91, and an electric energy supply circuit 93 for obtaining a predetermined amount of discharge energy is connected to the electrodes 92.

The electric energy supply circuit 93 is connected in series between the power supply device 94 connected to the terminal 92a of each electrode 92 and the power supply device 94 and one terminal 92a, and the power supply device 94 and both terminals are connected. A charge control circuit 96 for controlling a capacitor 95 connected in parallel with 92a to store a predetermined amount of electric capacity, and a discharge connected between this charge control circuit 96 and one terminal 92a. It is composed of a switch 97 and the like.

According to the eighth embodiment, the pair of electrodes 92 is attached to the fuel tube 30 via the holding member 91, and the tip end of each electrode 92 is attached to the fuel tube 30.
Located inside. Then, the electric energy supply circuit 93 is connected to the terminal 92a of the electrode 92, a predetermined electric capacity is accumulated in the capacitor 95, and then the discharge switch 97 is turned on. Then, a predetermined amount of electric energy is supplied to the electrodes 92 in a short time, and high-voltage discharge energy is generated between the tips of both electrodes 92, which ignites the fuel and explodes. Therefore, compared with the case of using an ignition device such as an electric detonator that uses explosives, there are fewer restrictions on handling, and blasting can be performed easily.

[0070]

According to claim 1 of the present invention described above, by using a fuel tube having a metal foil film attached to the inner surface thereof, detonation propagation can be improved and the tube diameter can be reduced. As a result, the weight can be reduced, and the device can be made compact to facilitate transportation. Furthermore, it is possible to easily deploy the fuel tube through the projectile ejected by the projecting device, even in places and areas where workers cannot approach, so that an explosion causes an artificial avalanche. Blasting of obstacles such as rocks can be performed easily and economically.

According to claim 2 of the present invention described above,
The projectile side tube part can facilitate detonation propagation and reduce the critical drug diameter, and the fuel supply device side tube part without the metal foil film creates an area that does not easily propagate detonation and is non-explosive. Accordingly, it is possible to prevent the fuel supply device side from being destroyed due to the influence of the explosion.

According to the third aspect of the present invention described above, as the fuel, one having improved detonation sensitivity and detonation propagation can be used. Further, according to the above-mentioned claim 4 of the present invention, since nitromethane having a low explosive property is used, the safety in handling can be enhanced.

According to claim 5 of the present invention described above,
It is possible to provide a remote blasting device that easily and reliably realizes the occurrence of an artificial avalanche and the blasting of obstacles such as rocks as planned.

According to the sixth aspect of the present invention described above, the fuel can be sufficiently and reliably supplied by pumping. Further, according to the above-mentioned claim 7 of the present invention, it can be made simpler and lighter than the pump-using type, so that it can be carried easily by carrying.

According to claim 8 of the present invention described above,
When the fuel tube is pulled out from the projectile, the tension is applied to the braking rope, and as a result, when strong wind is blowing at the time of launch, the fuel tube flutters with the braking rope side upwind. And, it can be pulled out in a state where it is not easily affected by the wind. Then, the fuel tube can be dropped by setting the braking cable as a lower layer and increasing the speed by the weight of the braking cable, that is, shortening the time affected by the wind. As a result, the fuel tube can be laid linearly, and the fuel can be laid along the planned line.

According to the above-mentioned claim 9 of the present invention, even if the projectile lands and then jumps or falls depending on the landing posture or landing landform, the separated fuel tube side Therefore, the fuel tube can be laid without twisting or cutting, so that the fuel can be laid along the planned line.

Further, according to the tenth aspect of the present invention described above, by using the ignition device utilizing high-voltage discharge energy, as compared with the case of using an ignition device such as an electric detonator using explosive, There are fewer restrictions on handling, and blasting can be performed easily.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a perspective view of a remote blast device when a projectile is fired.

FIG. 2 is a partially cutaway side view of a main part of the remote blast device when the projectile is loaded.

FIG. 3 is a partially cutaway side view of a projectile in the remote blast device.

FIG. 4 is a bottom view of a projectile in the remote blast device.

FIG. 5 is a front view of a projectile in the remote blast device.

FIG. 6 is a side view of a front wing portion of a projectile in the remote blast device.

FIG. 7 is a rear view of the front wing portion of the projectile in the remote blast device.

FIG. 8 is a side view of a rear wing portion of a projectile in the remote blast device.

FIG. 9 is a rear view of the rear wing portion of the projectile in the remote blast device.

FIG. 10 is a sectional view of a main part of a fuel tube in the remote blast device.

FIG. 11 is a side view of the remote blast device when fuel is supplied.

FIG. 12 is a perspective view showing the second embodiment of the present invention when the projectile is fired in the remote blast device.

FIG. 13 is a perspective view of a pneumatic feeding type fuel supply device portion of the remote blast device.

FIG. 14 is a cross-sectional view of a connecting flange portion in the remote blast device.

FIG. 15 shows a third embodiment of the present invention and is a partially cutaway side view of a pneumatically-powered fuel supply device portion of the remote blasting device.

FIG. 16 is a perspective view of a mat-shaped fuel tube portion of the remote blast device according to the fourth embodiment of the present invention.

FIG. 17 is a schematic perspective view showing the fifth embodiment of the present invention when the fuel tube is deployed in the remote blast device.

FIG. 18 shows a sixth embodiment of the present invention and is a vertical cross-sectional side view of a main part of a projectile in a remote blast device.

FIG. 19 is a vertical sectional front view of a projectile in the remote blast device.

FIG. 20 is a schematic perspective view showing the seventh embodiment of the present invention when the fuel tube is deployed in the remote blast device.

FIG. 21 is an overall configuration diagram of an ignition device in a remote blast device, showing an eighth embodiment of the present invention.

[Explanation of symbols]

1 Compressed air projection device 2 launcher 4 Air storage 10 Projectile 13 body 14 Rear lid 16 front wing 22 rear wing 30 Fuel tube 30A Projector side tube 30B Fuel supply device side tube 31 outer skin 32 Metal foil film 33 Electric detonator 36 Braking cable support 40 Pump pressure feeding type fuel supply device 41 Fuel injection pump 42 Fuel tank 46 igniter 48 air cylinders 50 Air pressure type fuel supply device 51 fuel tank 58 frame 59 portable bands 60 Air cylinder for pressure feeding 65 Flexible partition 70 Matte-shaped projecting body side tube 75 Matte-shaped projecting body side tube 76 Braking rope 81 Locking tool (joint part) 83 Lock plate 84 Lock plate 87 Parachute 90 Ignition device 93 Electric energy supply circuit C connecting part W width

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-52-121904 (JP, A) JP-A-8-233496 (JP, A) JP-A-8-109089 (JP, A) JP-A-8- 159700 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F42D 1/00-3/00 F41H 11/12 E04H 9/16

Claims (10)

(57) [Claims] 1. A fuel tube having a metal foil film adhered to the inner surface thereof is developed through a projectile ejected by a projection device, and then fuel is injected into the fuel tube.
And a remote blast method characterized by igniting fuel to explode. 2. The fuel tube is connected to the projectile side tube portion, which is connected to the projectile body side and has a metal foil film attached to the inner surface, and the fuel supply tube side, with the electric detonator attached as a boundary. The remote blasting method according to claim 1, characterized in that it is divided into a tube portion on the fuel supply device side to which the metal foil film is not attached. 3. The remote according to claim 1, wherein the fuel is a flame-retardant substance, or a liquid or foam in which a bubble-containing material and a thickening agent are mixed based on the flame-retardant material. Bombing method. 4. The remote blasting method according to claim 3, wherein the flame-retardant substance is nitromethane. 5. A projection device having a launch tube, a projecting body loaded in the launch tube and having deployable wings, and a fuel tube which is housed in the projecting body and deployed by firing the projecting body. And a fuel supply device for injecting liquid or foamed fuel into the expanded fuel tube, wherein a metal foil film is attached to the inner surface of the fuel tube. 6. The remote blasting device according to claim 5, wherein the fuel supply device is of a pumping type. 7. The remote blasting device according to claim 5, wherein the fuel supply device is of pneumatic type. 8. A braking line is provided on the fuel tube over the entire length, a free end portion of the braking line is connected to a braking line support frame, and a tip end portion of the braking line is connected to a projecting body. 6. The remote blasting device according to claim 5, wherein 9. The remote blast according to claim 5, wherein the connecting portion between the tip portion of the fuel tube and the projectile is separated when a tension of a set value or more acts on the fuel tube side. apparatus. 10. The remote blasting apparatus according to claim 5, wherein an ignition device utilizing high-voltage discharge energy is used to ignite the fuel.