JP2003281637A - Antitheft device for fire extinguisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antitheft device for fire extinguisher which raises an alarm immediately when a fire extinguisher on a mount base is removed. <P>SOLUTION: This antitheft device for fire extinguisher A has a hollow fire extinguisher placing base 1 having a fire extinguisher mount surface 2 on the upper surface; and a bell 3, a hammer member 4 for continuously striking the bell 3, a spiral spring 6 for operating the hammer 4 by a restoring force, and a switch member 7 regularly biased upward by a spring 12 through the fire extinguisher mount surface 2, which are arranged within the fire extinguisher mount base 1. The switch member 7 is moved down against the spring 12 by the weight of a fire extinguisher B placed on the fire extinguisher mount surface 2, and a horizontal rod member 10 that is part of the hammer member 4 is pressed in an unmovable state by the lower end surface of the switch member 7 to suppress the restoring force of the spiral spring 6. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for a fire extinguisher that issues an alarm and prevents theft when a fire extinguisher installed at a predetermined location in a building is removed from its installation location. Is.

[0002]

2. Description of the Related Art A fire extinguisher is installed at a predetermined place in a building to prevent fire spread by performing an initial fire extinguishing activity when a fire occurs, but this fire extinguisher is portable. There is a risk that the fire extinguisher may be stolen. Therefore, a fire extinguisher has conventionally been equipped with an antitheft device.

As such an anti-theft device, a device in which a fire extinguisher is housed in a storage box and an alarm is issued when the door of the storage box is opened is often used. For example, a bell is provided in a storage box, and a hammer member that strikes the bell is operated by energizing an electromagnet, and a switch that energizes the electromagnet when the door of the storage box is opened is closed to cause a hammer member. Is configured to continuously strike the bell to generate an alarm sound.

[0004]

However, in the antitheft device as described above, an alarm sound is emitted when the door of the storage box is opened, but an alarm sound is generated when the door is immediately closed after the fire extinguisher is taken out from the storage box. Will stop ringing, and thus theft cannot be effectively prevented. Further, since the hammer member is configured to be operated by energizing, even if the door of the storage box is opened in the event of a power failure, no alarm sound will be emitted, so it has a sufficient function as an anti-theft device. In addition, the installation site is restricted because it requires connection wiring from the power supply to the fire extinguisher installation site,
There is a problem that it is difficult to transfer from that position to another place. In addition, using a battery as a power source is extremely uneconomical because it requires replacement of the battery in a fire extinguisher that is left unused for a long period of time.

The present invention has been made in view of the above problems, and an object thereof is to give an alarm when the extinguisher is installed at a predetermined position by utilizing the weight of the extinguisher. (EN) Provided is an anti-theft device for a fire extinguisher, which prevents a fire from occurring and mechanically issues an alarm immediately when the fire extinguisher comes off the installation surface.

[0006]

In order to achieve the above object, a fire extinguisher anti-theft device according to the present invention has an upper surface formed on a fire extinguisher mounting surface as described in claim 1. A bell that issues an alarm, a hammer member that continuously strikes the bell, a mainspring that operates the hammer member by the restoring force, and a mainspring that is restored by the weight of the fire extinguisher placed on the mounting surface A switch member for suppressing the force is provided, and when the fire extinguisher is detached from the mounting surface, the force for suppressing the mainspring by the switch member is released and the bell member is continuously tapped by the hammer member.

In the fire extinguisher anti-theft device thus constructed, according to the invention of claim 2, the bell, the hammer member and the mainspring are installed in the fire extinguisher mounting table.
The switch member penetrates the mounting surface of the fire extinguisher mounting table and is constantly urged upward by the spring force. The switch member is moved downward by the weight of the fire extinguisher and the lower end surface of the switch member causes a hammer member. It is characterized in that a part of is pressed in an inoperative state.

In the anti-theft device for a fire extinguisher according to a third aspect of the present invention, the base end of the hammer member is pivotally attached to the bottom plate of the fire extinguisher mounting table so as to be reciprocally rotatable. A power transmission mechanism composed of a meshing gear train for transmitting the restoring force of the mainspring to the hammer member is provided between the hammer member and the mainspring, and is integrally provided at the projecting end of the hammer member projecting from the pivot portion. The hammer member is configured to reciprocally rotate by engaging and disengaging the pawl with the gear in the last row of the power transmission mechanism.

[0009]

First, the switch member is manually pushed down to make the hammer member inoperative. In this state, the hammer member operating mainspring is wound so that the spring has a predetermined elastic restoring force. Then, the fire extinguisher is immediately placed on the placing surface of the placing table, and the switch member protruding from the placing surface is pushed down by its weight to keep the hammer member in the inoperative state. In this state, the fire extinguisher installed on the mounting table is arranged at a desired position in the building.

Next, when the fire extinguisher installed on the mounting table is lifted from the mounting table, the weight of the fire extinguisher pushed down by the switch member is released, and the fixing of the hammer member by the switch member is released. The elastic restoring force of the hammer causes the hammer member to rapidly rotate back and forth, continuously striking the bell,
Generate an alarm sound. This alarm sound will be emitted continuously for a long time until the elastic restoring force of the mainspring is lost unless the fire extinguisher is returned to the original position on the mounting table, and thus a reliable antitheft function can be exerted.

If a fire extinguisher is detached from the mounting table when a fire occurs, the alarm sound is emitted as described above, so that it is possible to inform that a fire has occurred. In this way, with the fire extinguisher installed on the mounting table,
The hammer member is mechanically fixed through the switch member by the weight of the fire extinguisher, and the hammer member is also mechanically operated by the elastic restoring force of the mainspring, so that the hammer member can be left unused for a long period of time. The alarm can be surely generated during use. Further, since the hammer member, the mainspring, and the like are arranged in the mounting table, the handling is improved, and when the installation location of the fire extinguisher is changed, the mounting table can be easily moved to the installation location. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a fire extinguisher B is installed on a mounting table 1 forming a main body of an antitheft device A for a fire extinguisher. 2 is a plan view of the mounting table 1 shown in FIG. 2, and FIG. 3 is a plan view showing an internal structure of the mounting table 1.
The mounting table 1 is formed in a hollow rectangular plate shape in which the four-sided top plate 1a and the bottom plate 1b are integrally fixed to each other by peripheral wall plates 1c having a constant height, and the top surface of the top plate 1a is fixed. The outer peripheral portion is formed on the mounting surface 2 on which the lower end surface of the fire extinguisher B is installed. Note that the mounting table 1 is not limited to a rectangular shape in a plane, and may be formed in an appropriate hollow mounting table having a circular shape, an elliptical shape, a polygonal shape, or the like. Further, at four corners of the mounting table 1, mounting holes 1d are formed to vertically penetrate the mounting table 1 for fixing the mounting table 1 to a floor surface or the like.

The mounting surface 2 includes a short cylindrical inner peripheral wall 2a having a diameter smaller than the inner diameter of the cylindrical body b of the fire extinguisher B and the cylindrical body b of the fire extinguisher B on the outer periphery of the top plate 1a. An outer peripheral wall 2b having a shorter tubular shape having a diameter larger than the outer diameter is vertically projected upward and is formed by a top plate outer peripheral portion between the inner and outer peripheral walls 2a and 2b, and the inner and outer peripheral walls 2a and 2b. The lower end of the cylindrical device body b of the fire extinguisher B is fitted into the ring-shaped space 2c between them so that the fire extinguisher B can be placed on the placement surface 2.

Further, inside the hollow of the mounting table 1 described above, a bell 3 for emitting an alarm sound, a hammer member 4 for continuously striking the bell 3, and a power transmission mechanism for the hammer member 4 by elastic restoring force of a spring. A spring (spiral spring) 6 that is operated via 5 and a switch member 7 that moves downward by the weight of the fire extinguisher B to fix the hammer member 4 in an inoperative state against the restoring force of the spring 6. An anti-theft device is provided.

The bell 3 is made of metal and formed in a bowl shape, and the central portion of the bell 3 is fixed by a fixed shaft 3a on the bottom plate 1b of the mounting table 1, for example, the front portion as shown in FIGS. 2 and 3. While being fixed in the center, the hammer member 4, the power transmission mechanism 5 and the mainspring 6 are attached to a fixed frame 8 arranged in parallel behind the bell 3. This fixed frame 8
As shown in FIG. 4, an upper surface plate 8a and a lower surface plate 8b, which are formed in an appropriate planar shape (a flat trapezoidal shape in the drawing), are fixed by a plurality of connecting shafts 8c with a certain space. That is, it is fixed to the center of the rear part of the bottom plate 1b inside the hollow of the mounting table 1.

The upper and lower face plates 8a, 8b of the fixed frame 8
A reciprocating rotary shaft 9 to which the base end of the arm rod 4a of the hammer member 4 is integrally fixed is rotatably supported between the one side ends. Then, the hammer member 4 is horizontally projected from the fixed frame 8 to one side of the bell 3, and the spherical tapping head 4b fixed to the tip of the arm rod 4a is attached to one side of the bell 3. The bell 3 is continuously struck by the operation of the reciprocating rotary shaft 9 so as to face each other.

Further, a flat surface L is formed at the lower end of the reciprocating rotary shaft 9.
The base end of a rod-shaped horizontal rod member 10 that is bent in a letter shape is integrally fixed to the horizontal rod member 10 so as to project toward one side, and the reciprocating rotary shaft 9 causes the hammer member 4 to move. A third gear 5c whose base end constitutes the power transmission mechanism 5 and which will be described later
Toward the fork, and the third gear is provided at the protruding end.
A pair of claws 4c and 4d which are alternately engaged and disengaged with 5c are formed.

Further, one side portion of the top plate 1a of the mounting table 1 facing above the horizontal rod member 10 vertically penetrates one side portion of the fire extinguisher mounting surface 2 of the top plate 1a. Is formed in the ring-shaped space 2c between the inner and outer peripheral walls 2a, 2b forming the fire extinguisher mounting surface 2, and the switch member 7 is mounted on the hole 11 in this hole 11. It is inserted and retracted in the vertical direction from inside 1 toward the ring-shaped space 2c.

As shown in FIG. 1, the switch member 7 has a hole-shaped recess 7 having a predetermined depth provided on both sides of the lower surface thereof.
The coil springs 12, 12 are interposed in a compressed state between the insides of a, 7a and the inner bottom surface of the mounting table 1, and are constantly urged upward by the elastic force of the coil springs 12, 12. When the fire extinguisher B is installed on the stand 1, the fire extinguisher B is installed.
The lower end surface of the hammer moves the switch member 7 downward against the elastic force of the coil springs 12, 12, and the lower end surface and the inner bottom surface of the bottom plate 1b of the mounting table 1 cause the horizontal rod member 10 of the hammer member 4 to move. While the hammer member 4 is held in an inoperative state by sandwiching and fixing the coil springs 12, the coil springs 12 and 12 are elastically restored when the fire extinguisher B is not installed on the mounting table 1 as shown in FIG. The upper half of the hole is
The horizontal rod member 10 is structured so as to be released upward from the above to release the fixation of the horizontal rod member 10.

The upper half of the switch member 7 is formed smaller than the lower half and a step portion 7b is formed in a continuous portion of the switch member 7, and the step portion 7b is formed on the mounting table 1 in the hole 11. The upper surface of the plate is locked to prevent further upward movement. Further, the bottom plate 1b of the mounting table 1 has the lower half portions of the coil springs 12, 12 wound thereon, and a fixing pin 13 projecting upwardly capable of being inserted into the hole-shaped recess 7a of the switch member 7. The switch member 7 is moved up and down at a predetermined position.

On the other hand, the reciprocating rotary shaft 9 of the hammer member 4 is
The spring 6 for operating the spring by the spring force is
A spiral spring formed by spirally winding a strip plate, and upper and lower face plates 8a and 8b of the fixed frame 8 fixed at a predetermined position in the mounting table 1 at the outer end of the spiral as shown in FIG. It is fixed and supported by one connecting shaft 8c among a plurality of connecting shafts 8c connecting the two, and the winding inner end is freely rotatable between the other side parts of the upper and lower plates 8a and 8b of the fixed frame 8. It is wound around the main shaft 14 supported by the main shaft 14 and the inner end of the winding is connected to the main shaft 14.

Further, an upper end portion of the main shaft 14 is projected upward from the upper surface plate 8a of the fixed frame 8 and a square columnar handle body 15 is fixed to the projecting end, and the handle body 15 is attached to the mounting table 1 described above. The handle body is exposed to the outside through the opening 16 formed on the other side of the top plate 1a of the top plate 1a from above the mounting table 1.
The mainspring 6 is wound in the diameter reducing direction by rotating 15 so as to hold a predetermined spring force.

The power transmission mechanism 5 interposed between the main shaft 14 and the reciprocating rotary shaft 9 of the hammer member 4 comprises a meshing gear train, and the main shaft 14 has a plurality of locking holes in its outer peripheral portion. 51
The first gear 5a, which is formed in the circumferential direction at small intervals.
While being loosely fitted relative to the first gear 5a, the central portion of the power transmission arm 17 is fixed to the upper portion of the main shaft 14 above the first gear 5a, and both ends of the arm 17 are fixed to the upper portion of FIG. In this case, the mainspring 6 is bent in a loosening direction, that is, counterclockwise, and the bent tip portion is bent further downward to form an engaging piece portion 17b engaging and disengaging with the locking hole 51.

Therefore, when the handle body 15 is rotated in the clockwise direction, the arm 17 integrally engages with the engaging hole 51 on the outer peripheral portion of the first gear 5a while sequentially engaging and disengaging the tip engaging piece portion 17b. While rotating to wind and tighten the mainspring 6, the elastic restoring force of the mainspring 6 acts in a direction to rotate the main shaft 14 counterclockwise after the winding and tightening, so that the engaging piece portion 17b of the arm 17 has a locking hole. The main shaft 14 is locked in a direction to bite into the shaft 51 and the rotation of the main shaft 14 is transmitted to the first gear 5a via the arm 17 so that the first gear 5a is integrally rotated in the same direction.

Further, the power transmission mechanism 5 is formed by sequentially meshing the second gear 5b and the third gear 5c with the first gear 5a. More specifically, the rotation center shafts 52 and 53 of the second gear 5b and the third gear 5c have upper and lower ends of the upper and lower plates of the fixed frame 8, respectively.
It is rotatably supported by 8a and 8b, and the second gear 5b
Has a small-diameter gear 5b 'integrally fixed to the lower part of its center shaft 52 and engages the first gear 5a with the small-diameter gear 5b'. The third gear 5c has a small-diameter gear 5c 'on the upper part of its central shaft 53. The small gear 5c 'is fixed and the second gear 5b is meshed with the small gear 5c' to form the first gear.
The ratio of the number of rotations of the third gear 5c to one rotation of 5a is increased. The hammer member 4 is operated by the rotation of the third gear 5c.

The relationship between the hammer member 4 and the third gear 5c is such that each tooth of the third gear 5c is formed in a wave shape, and the reciprocating rotary shaft 9 of the hammer member 4 is attached to any of the teeth. In the state where one claw 4c of the pair of claws 4c and 4d protruding from is locked, the other claw 4d is locked from a tooth several teeth away from the tooth on which the one claw 4c is locked. Has been solved,
When one claw 4c is disengaged from the above tooth, the other claw 4d is locked to the facing tooth, and this is alternately repeated to
The third gear 5c is intermittently sequentially rotated in one direction by the elastic restoring force of the mainspring 6 by a pitch corresponding to the teeth, and the hammer member 4 is reciprocally rotated about the reciprocating rotation shaft 9 so that the bell 3 is moved. It is configured to be tapped continuously. The pawls 4c and 4d are formed in such a shape that they can slide in the curved surface of the tooth of the third gear 5c and move in the direction of coming out of the tooth at the moment when it is locked to the tooth.

Next, the operation of the anti-theft device A for the fire extinguisher B in the embodiment configured as described above will be described. First, it projects upward from the mounting surface 1 through the hole 11 from inside the mounting table 1. By pushing down the switch member 7 against the elastic force of the coil spring 12, an L-shaped horizontal rod member protruding from the reciprocating rotary shaft 9 between its lower end surface and the inner bottom surface of the bottom plate 1b of the mounting table 1. 10 is clamped and fixed to prevent the reciprocating pivot shaft 9 from pivoting through the power transmission mechanism 5 by the spring force of the mainspring 6, and then the opening 16 of the top plate 1a of the mounting table 1.
The mainspring 6 is wound and tightened by rotating the handle body 15 facing in one direction in one direction (clockwise in FIG. 2).

Immediately after that, the lower end of the cylindrical body b of the fire extinguisher B is immediately formed in the ring-shaped space 2c between the inner and outer peripheral walls 2a and 2b projecting on the outer peripheral portion of the top plate 1a of the mounting table 1. Insert the fire extinguisher B into the mounting surface 2 with its lower end surface mounted on the mounting surface 2.
To stand upright.

At this time, the switch member 7 which is released after the mainspring 6 is tightened is again moved upward from the mounting table 1 through the hole 11 into the ring-shaped space 2c by the restoring force of the coil springs 12, 12. Since it protrudes, the lower end surface of the cylindrical body b contacts the upper end surface of the switch member 7 before the lower end surface of the cylindrical body b of the fire extinguisher B is received by the mounting surface 2. From the state, the extinguisher B is inserted into the ring-shaped space 2c while pushing down the switch member 7 against the elastic force of the coil springs 12 and 12 by the weight of the fire extinguisher B, and the lower end surface of the cylindrical device body b is placed. Place on surface 2.

When the switch member 7 is pushed down by the weight of the fire extinguisher B, the lower end surface of the switch member 7 is placed on the horizontal rod member 10 projecting from the reciprocating rotary shaft 9 of the hammer member 4 as described above. The reciprocating rotary shaft 9 that abuts and clamps the horizontal rod member 10 between the lower end surface of the switch member 7 and the upper surface of the bottom plate 1b of the mounting table 1 to fix the horizontal rod member 10 and to operate the hammer member 4. It is fixed in a non-rotatable state.

The inner and outer peripheral walls 2 forming the mounting surface 2
The width between a and 2b is wide enough so that the outer peripheral wall 2a and the fire extinguisher B
Since a space into which a fingertip can be inserted can be provided between the outer peripheral surface of the cylindrical body b of FIG. 1 and the switch member 7 is pushed down through this space, the mainspring 6 is wound and tightened. After that, without letting go of the switch member 7,
By installing the fire extinguisher B on the mounting surface 2 while maintaining the depressed state, it is possible to eliminate the temporary operation of the hammer member 4 due to the release of the switch member 7.

Further, when the horizontal rod member 10 is held down by the lower end surface of the switch member 7, the upper end surface of the switch member 7 is flush with the fire extinguisher mounting surface 2 and the cylindrical body b of the fire extinguisher B. In order to install the lower end surface of the switch on the mounting surface 2 entirely, the height of the switch member 7 must be equal to the vertical width between the horizontal rod member 10 and the mounting surface 2. However, if the switch member 7 is formed to be shorter than this vertical width dimension, the upper half and the lower half of the switch member 7 are separated, and a spring is interposed between the facing surfaces of the separated portion. It is not necessary that the height of the switch member 7 is equal to the vertical width dimension between the horizontal rod member 10 and the mounting surface 2, and the lower end face of the switch member 7 is securely and firmly placed on the horizontal rod member 10. It can be pressed.

In this manner, the fire extinguisher B is installed on the mounting table 1 and is arranged on the floor along the inner wall facing the passage in the building, and the mounting table 1 is provided at the four corners thereof. It is fixed on the floor surface with bolts or the like through the mounting hole 1d. Note that the fire extinguisher B may be installed in an exposed state on the mounting table 1 as shown in FIG. 6, and as shown in FIG. 7, it is stored in the fire extinguisher storage box C together with the mounting table 1. It may be placed in.

In the installed state of the fire extinguisher B,
When the fire extinguisher B is lifted and detached from the mounting surface 2 of the mounting table 1, the switch member 7, which was previously immersed in the mounting table 1 due to the weight of the fire extinguisher B, is restored by the restoring force of the coil springs 12, 12. The horizontal rod member 10 is moved upward to project upward from the mounting surface 2, and the lower end surface and the inner bottom surface of the bottom plate 1b of the mounting table 1 release the fixation of the horizontal rod member 10.

Then, the reciprocating rotary shaft 9 on which the horizontal rod member 10 is integrally projected is rotatable, and the spring force of the mainspring 6, that is, the elastic restoring force held by the winding tightening. It is transmitted to the reciprocating rotary shaft 9 through the power transmission mechanism 5 composed of a meshing gear train to rotate the third gear 5c in the last train in one direction, and the revolving rotary shaft 9 is rotated by this rotary power.
A pair of claws 4c and 4d of the hammer member 4 protruding from the shaft are alternately engaged and disengaged with the teeth of the third gear 5c to move the reciprocating rotary shaft 9 clockwise and counterclockwise within a certain angle range. When the hammer member 4 reciprocally rotates, the hammer member 4 integrally reciprocates around the reciprocating rotation shaft 9 to repeatedly strike the bell 3 continuously, generate an alarm sound, and the fire extinguisher B is taken out of the mounting table 1. To inform you that

The tapping of the bell 3 by the hammer member 4 occurs continuously for a long time until the spring force of the mainspring 6 disappears unless the fire extinguisher B is returned to the mounting surface 2 of the mounting table 1. However, since the alarm is issued at the moment when the fire extinguisher B is lifted from the placing surface 2 of the mounting table 1, even if the fire extinguisher is stolen, the fire extinguisher B is returned to its original position by being surprised by the alarm sound. , Can prevent theft. In order to stop the alarm sound, the switch member 7 must be pushed down to make the reciprocating rotary shaft 9 inoperative, but the position of the switch member 7 is unknown, and even if it is known, the switch member 7 cannot be operated. Since it projects between the inner and outer peripheral walls 2a, 2b forming the mounting surface 2, these inner and outer peripheral walls 2a, 2b become an obstacle, and it becomes difficult to place another heavy object on the switch member 7, thus As described above, unless the fire extinguisher B is installed again on the mounting surface 2 of the mounting table 1, the alarm sound cannot be stopped midway.

Further, if the fire extinguisher B is removed from the mounting table 1 in the event of a fire, the bell 3 is struck by the hammer member 4 to generate an alarm sound as described above. It is possible to promptly notify that a fire has occurred around.

In the above embodiment, the reciprocating rotary shaft 9 of the hammer member 4 is operated by the spring force of the mainspring 6 via the power transmission mechanism 5 composed of the meshing gear train. 9 is provided with a pair of claws 4c and 4d integrated with the base end of the hammer member 4, and these claws 4c and 4d are alternately engaged with the teeth of the third gear 5c of the meshing gear train. However, as shown in FIG. 8, the central portion of the disk 5d is integrally fixed to the gear 5c 'in the last row of the power transmission mechanism 5, and the outer peripheral portion of the disk 5d is projected at small intervals in the circumferential direction. This may be done by engaging and disengaging the short shaft portion 4e protruding from the reciprocating rotary shaft 9 with the pin 54 provided, or as shown in FIG. 5c 'to cam plate 5d'
May be integrally fixed, and the cam surface 55 formed on the outer peripheral surface of the cam plate 5d 'may be engaged with and disengaged from the short shaft portion 4e protruding from the reciprocating rotary shaft 9. In this case, the arm rod 4a of the hammer member 4 may be always biased toward the bell 3 by the spring 56. Since other structures are similar to those of the above-described embodiment, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

[0039]

As described in claim 1, a fire extinguisher anti-theft device of the present invention has a bell for issuing an alarm on a fire extinguisher mounting table having an upper surface formed on the fire extinguisher mounting surface, and A hammer member for continuously striking the bell, a mainspring for activating the hammer member by the restoring force, and a switch member for suppressing the restoring force of the mainspring by the weight of the fire extinguisher placed on the mounting surface are provided. Therefore, when the fire extinguisher is detached from the mounting surface, the switch member releases the power of the mainspring to continuously strike the bell, so that the fire extinguisher is mounted on the fire extinguisher mounting table. At the moment when the spring member is lifted from the placing surface, the force of the switch member to restrain the mainspring is released, and the elastic restoring force of the mainspring causes the hammer member to continuously tap the bell, and an alarm sound is generated.

Therefore, since the person who tries to steal the fire extinguisher is surprised by the alarm sound and returns the fire extinguisher to the original position, it is possible to prevent the fire extinguisher from being stolen. In addition, the alarm sound that is generated will continue to be generated for a long time until the elastic restoring force of the mainspring disappears, unless the fire extinguisher is placed on the fire extinguisher mounting surface of the fire extinguisher mounting table again. Therefore, a reliable antitheft effect can be obtained.

When the fire extinguisher is placed on the fire extinguisher mounting surface of the fire extinguisher mounting table, depending on the weight of the fire extinguisher placed on the fire extinguisher mounting surface of the fire extinguisher mounting table. Since the restoring force of the mainspring is mechanically restrained via the switch member, unlike the case where the restoring force of the spring is electrically restrained, the restraint of the spring may be abruptly released due to a power failure or battery exhaustion. No unforeseen circumstances will occur. Therefore, unless the fire extinguisher is removed from the fire extinguisher mounting surface of the fire extinguisher mounting table, the restoring force possessed by the mainspring continues to be retained and is maintained for a long period of time. Even after the fire extinguisher is not removed from the fire extinguisher mounting surface, if the fire extinguisher is removed from the fire extinguisher mounting surface of the fire extinguisher mounting table, an alarm sound is reliably generated.

Further, since the anti-theft device for a fire extinguisher is operated by the mainspring, it is not necessary to supply electric power to the anti-theft device for a fire extinguisher. Therefore,
A fire extinguisher anti-theft device can be installed inside a building that does not have a power supply facility. In addition, since the above fire extinguisher anti-theft device does not require connecting wiring for supplying power, it is not necessary to perform electrical work such as connecting or disconnecting wiring when changing the installation location, and it is easy to install Can be changed.

In addition, if a fire extinguisher is installed on the fire extinguisher mounting table in order to use the fire extinguisher installed on the fire extinguisher mounting table in the event of a fire, an alarm sound will be issued immediately and reliably. It is possible to inform people around you that a fire has occurred. Moreover, as mentioned above, this anti-theft device for fire extinguisher does not require electric power, so even if there is a failure in the power system in the building due to the fire, the fire extinguisher should be used to extinguish the fire on the fire extinguisher mount. If you remove it from the mounting surface,
It is possible to immediately and surely generate an alarm sound to notify people in the vicinity of the fire.

Further, as described in claim 2, while the bell, the hammer member and the mainspring are installed in the fire extinguisher mounting table, the switch member penetrates the mounting surface of the fire extinguisher mounting table and the spring force is applied. Is always urged upward by
When this switch member is moved downward by the weight of the fire extinguisher and a part of the hammer member is pressed by the lower end surface of the switch member in an inoperative state, the fire extinguisher mounting surface of the fire extinguisher mounting table is When the installed fire extinguisher is removed, the switch member immediately moves upward due to the spring force, and the lower end surface of the switch member is reliably separated from the part of the hammer member, and the pressing of the part of the hammer member is released and the mainspring The restraint of resilience is lifted. Therefore, even if the fire extinguisher is removed from the fire extinguisher mounting surface of the fire extinguisher mounting table, the switch member continues to press a part of the hammer member due to its own weight and an alarm sound is not generated. No situation occurs, and when the fire extinguisher is removed from the fire extinguisher mounting surface of the fire extinguisher mounting table, an alarm sound is reliably generated, and a high antitheft effect is achieved.

Finally, in the anti-theft device for a fire extinguisher, according to the invention of claim 3, the base end of the hammer member is pivotally attached to the bottom plate of the fire extinguisher mounting table so as to be reciprocally rotatable. A power transmission mechanism consisting of a meshing gear train for transmitting the restoring force of the mainspring to the hammer member is provided between the hammer member and the mainspring, and is integrally provided at the projecting end of the hammer member projecting from the pivot portion. Since the hammer member is configured to reciprocally rotate by engaging and disengaging the existing pawl with the gear in the last row of the power transmission mechanism, the elastic restoring force of the mainspring is restored by the power transmission mechanism which is the meshing gear train. Can be reliably transmitted to the hammer member, and the pawl provided integrally with the hammer member is disengaged from the gear in the last row of the power transmission mechanism, so that the elastic restoring force of the spring causes the hammer to move. It can be reliably reciprocatingly rotated the member. Therefore, even if the fire extinguisher on the extinguisher mounting surface of the fire extinguisher mounting table is removed, an unexpected situation such as no alarm sound is generated, and the fire extinguisher mounting surface of the fire extinguisher mounting table is extinguished. When the container is removed, the elastic restoring force of the spring causes the hammer member to surely reciprocally rotate and continuously strike the bell to generate an alarm sound, and a higher antitheft effect can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a fire extinguisher mounting base of an anti-theft device of the present invention,

FIG. 2 is a plan view thereof,

FIG. 3 is a plan view showing its internal structure,

FIG. 4 is a perspective view showing a main part thereof,

FIG. 5 is a vertical sectional front view thereof,

FIG. 6 is a perspective view showing the usage procedure thereof,

FIG. 7 is a perspective view showing the usage procedure thereof,

FIG. 8 is a plan view showing an essential part of a fire extinguisher mounting table of another anti-theft device of the present invention,

FIG. 9 is a plan view showing a main part of a fire extinguisher mounting table of another anti-theft device of the present invention.

[Explanation of symbols]

1 Fire extinguisher stand 2 Fire extinguisher mounting surface 3 bell 4 hammer members 5 Power transmission mechanism 6 mainspring 7 switch member A Fire extinguisher anti-theft device B fire extinguisher

Claims (3)

[Claims] 1. A fire extinguisher mounting base having an upper surface formed on a fire extinguisher mounting surface, a bell for issuing an alarm, a hammer member for continuously striking the bell, and a mainspring for activating the hammer member by a restoring force. A switch member that suppresses the restoring force of the mainspring due to the weight of the fire extinguisher placed on the above-mentioned mounting surface is provided, and when the fire extinguisher separates from the mounting surface, the power of the mainspring is suppressed by the switch member. A fire extinguisher anti-theft device, characterized in that the bell member is continuously tapped by the hammer member. 2. A bell, a hammer member, and a mainspring are installed in a fire extinguisher mounting table, and a switch member penetrates a mounting surface of the fire extinguisher mounting table and is constantly urged upward by a spring force. The fire extinguisher prevention device according to claim 1, wherein the switch member is moved downward by the weight of the fire extinguisher so that a lower end surface of the switch member presses a part of the hammer member in an inoperative state. apparatus. 3. A hammer member has a base end portion pivotally attached to a bottom plate of a fire extinguisher mount so as to be reciprocally rotatable, and a restoring force of the mainspring is exerted on the hammer member between the hammer member and the mainspring. By disposing a power transmission mechanism composed of a meshing gear train for transmitting, and engaging and disengaging a pawl integrally provided on the protruding end of the hammer member protruding from the pivotal attachment portion with the gear in the last row of this power transmission mechanism. The anti-theft device for a fire extinguisher according to claim 1 or 2, wherein the hammer member is configured to reciprocally rotate.