JPH10244115A - Method of automatically extinguishing fire in dust collector and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform early fire fighting when a fire starts in a filter to a dust collector. SOLUTION: Dust generated when a workpiece W mounted on a working table 5 of a sheeting machine is worked is sucked into a body 31 of a dust collector together with an air current through a dust collecting dust 19. The sucked dust is stuck to a filter 37 in the dust collector body 31, and the clean air current which has passed through the filter 37 is discharged outside the dust collector body 31. The filter 37 is made a cylindrical body. In the upper part of the filter 37, an extinguishant area 53a where an extinguishant is sealed to be stored in advance within a belt-shaped area having a width in the height direction of the filter 37 is installed. In the middle part of the height direction of the filter 37, an extinguishant area 53b is similarly installed. When dust stuck on the filter 37 ignites to cause a fire, the filter 37 is broken and the extinguishant in the extinguishant areas 53a, 53b falls to perform incipient fire fighting to the firing site.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically extinguishing a dust collecting device in a sheet material processing machine, and more particularly, to sucking together with an air flow dust generated during work processing in a sheet material processing machine such as a laser processing apparatus or various fusing machines. The present invention relates to an automatic fire extinguishing method and apparatus for a dust collecting apparatus that accumulates dust and discharges a purified airflow to the outside.

[0002]

2. Description of the Related Art Conventionally, in a plate material processing machine such as a laser processing device or various fusing machines, dust such as spatter is generated when a work placed on a processing table is processed, and falls to a lower portion of the processing table. I do. This dust is sucked into the dust collecting device by a blower together with the airflow, and only the dust is filtered by a filter in the dust collecting device and adhered to the filter, or accumulated at a lower portion of the dust collecting device. On the other hand, the normal air that has passed through the filter is discharged to the outside of the dust collector by a blower.

[0003]

By the way, in the conventional dust collector, the dust adhering to the filter is relatively easy to ignite, and when the temperature of the dust is high, the dust itself ignites and ignites. There was a problem that a fire occurred in the filter.

In a conventional dust collector, there is a type in which the temperature of the exhaust gas is sensed and the dust collector and the plate processing machine are stopped when the filter fires. In this type of dust collector, the occurrence of a filter fire is detected. When an alarm is given, a warning is given to the worker to inform the worker, but this does not extinguish the initial fire, leading to a serious fire.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an automatic fire extinguishing method for a dust collector, which automatically extinguishes a fire when a fire occurs in a filter of the dust collector. It is to provide a device.

[0006]

According to a first aspect of the present invention, there is provided an automatic fire extinguishing method for a dust collecting apparatus according to the first aspect of the present invention, which processes a work placed on a processing table of a sheet metal working machine. The generated dust is sucked into the dust collector main body through the dust collecting duct together with the airflow, and the sucked dust is made to adhere to a filter in the dust collector main body. In the dust collecting device, the extinguishing agent is sealed in a part of the filter in advance, and the fire is extinguished by the extinguishing agent when a fire occurs in the filter.

Therefore, if a fire occurs in the filter, the fire will damage the filter. At this time, the fire extinguishing agent previously sealed in the filter will fall and act to extinguish the fire. Since the fire extinguishing agent is provided in a part of the filter, the function of filtering the dust by a normal filter is not hindered.

According to a second aspect of the present invention, there is provided an automatic fire extinguisher for a dust collecting apparatus according to the present invention, wherein dust generated when processing a work placed on a processing table of a sheet metal processing machine is passed through a dust collecting duct together with an air flow. It is sucked into the dust collector body, and the sucked dust is attached to a filter in the dust collector body,
In a dust collector that discharges an airflow that has passed through the filter to the outside of the dust collector main body, a fire extinguishing agent region formed by enclosing a fire extinguishing agent in a band-like range having a width in the height direction of the filter is provided. It is characterized by being provided in a part.

Therefore, as in the case of the first aspect, when a fire occurs in the filter, the filter is broken by the fire. At this time, the fire extinguishing agent previously sealed in the fire extinguishing agent region of the filter moves downward. It falls and acts on the filter where the fire is occurring, and the initial fire extinguishing is performed. In addition,
Since the fire extinguishing agent area is provided in a part of the entire filter, the filtering action of dust by a normal filter is not hindered.

According to a third aspect of the present invention, there is provided an automatic fire extinguisher for a dust collecting apparatus according to the present invention, wherein the fire extinguishing agent area is provided above the filter. Is what you do.

Therefore, when the fire extinguishing agent area is provided at the upper part of the filter, more preferably at the uppermost part, the fire extinguishing agent in the fire extinguishing agent area falls down when a fire occurs, and the fire is efficiently generated. To extinguish the fire.

According to a fourth aspect of the present invention, there is provided an automatic fire extinguisher for a dust collector according to the second aspect of the present invention, wherein the extinguishing agent area is provided above the filter. A plurality of fire extinguishing agent areas are provided substantially parallel to each other at appropriate intervals below the area.

Therefore, if a plurality of fire extinguishing agent areas are provided substantially in parallel in the height direction of the filter at appropriate intervals,
Since the fire extinguishing agent in the fire extinguishing agent area closest to the upper part falls from the place where the fire occurred and the initial fire extinguishing is performed, the initial fire extinguishing is performed very quickly after the fire occurs.

According to a fifth aspect of the present invention, there is provided an automatic fire extinguisher for a dust collector according to any one of the second to fourth aspects, wherein the filter comprises a cylindrical body. The fire extinguisher area is provided in the cylindrical body so as to form an annular shape.

Therefore, when the filter has a cylindrical shape, it is effective to provide an annular fire extinguishing agent region for the initial stage of the fire, for the reason described in the third and fourth aspects. Fire extinguishing is performed.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a method and an apparatus for automatically extinguishing a dust collecting apparatus according to the present invention.

Referring to FIG. 3 to FIG. 5, the laser beam machine 1 according to the present embodiment is provided with an upright bed 3, and a front portion (see FIGS. 4, a processing table 5 is fixedly provided.

A bed-shaped processing machine body 7 is integrally provided substantially at the center of the bed 3 and a laser oscillator 9 is provided at a rear portion (left portion in FIGS. 3 and 4) of the bed 3. Is provided.

A carriage 11 is provided above the machining table 5 in FIG. 4 so as to be movable in the X-axis direction (in the horizontal direction in FIGS. 3 and 4).
1 is provided with a work clamp 13 for clamping a work W to be processed.

With the above configuration, the work W is placed on the processing table 5 and clamped by the work clamp 13. By moving the carriage 11 in the X-axis direction, the work W is moved on the processing table 5 in the X-axis direction.

The processing machine body 7 is provided with a laser processing head 15 which is movable in the Y-axis direction (vertical direction in FIG. 4 and horizontal direction in FIG. 5). Two rotatable cutting rollers 1 with a gap are provided on the processing table 5 directly below the laser processing head 15.
7 are provided. The dust collecting duct 1 is provided in the bed 3.
9 and the dust collecting duct 19
Is connected to the dust collecting device 21 at the other end.

A chiller 23 is disposed on the left side of the dust collector 21 in FIG. Further, the processing machine body 7
In FIG. 5, an NC device 27 is provided on the left side via a rotatable bracket 25.

With the above configuration, the laser beam oscillated from the laser oscillator 9 is irradiated from the laser processing head 15 onto the work W via a plurality of bend mirrors (not shown), thereby performing laser processing. Therefore, the work W clamped by the work clamp 13 is moved in the X-axis direction, and the work W
Is moved in the Y-axis direction and the Z-axis direction, laser processing is performed at a desired position of the work. In addition, spatter and dust generated during laser processing are 2
The dust falls down from between the individual cutting rollers 17, passes through the dust collecting duct 19, and is collected by the dust collecting device 21.

The laser processing machine 1 has a processing table 5
Is provided. The cover 29 has an inverted U shape, and is configured such that the lower end surface of the cover 29 is placed on the bed 3.

Hereinafter, a method and an apparatus for automatically extinguishing a main dust collecting apparatus according to an embodiment of the present invention will be described.

Referring to FIG. 1, the interior of the dust collector main body 31 has a blower chamber 35 in which a blower 33 for generating an air current flowing from the processing table 5 through the dust collecting duct 19 into the dust collector main body 31 is installed. And a cleaning chamber 41 provided with a filtration chamber 39 in which a filter 37 for removing dusts is installed.

In the cleaning chamber 41, a filtration chamber 39 communicating with the dust collecting duct 19 is formed in a part of the lower part so as to provide a space in the upper part. Upper wall 45 of this filtration chamber 39
A first vent 47 communicating with a space above the clean room 41 is provided substantially at the center.

As shown in FIG. 2, a filter 37 having a cylindrical shape having an opening 49 at the upper end and a bottom wall 51 is provided in the filtration chamber 39. The upper edge is attached to the upper wall surface of the filtration chamber 39 so as to surround the periphery of the first vent 47.

More specifically about the filter 37,
As shown in FIG. 2, wherein the upper portion of the filter 37, so that the extinguishing agent region 53a formed by sealing the extinguishing agent in the range of strip having a width L ₁ in the height direction of the filter 37 is an annular It is provided in. In the present embodiment, the outer cover of the fire extinguishing agent region is made of the same material as the ordinary filter 37.

Examples of the fire extinguishing agent include powdery, moisture-proof sodium or potassium bicarbonates and other salts or phosphates and other flame-proofing salts. It also includes those mixed or added.

Further, the other extinguishing agent zone 53b is substantially parallel to the upper extinguishing agent zone 53a below the upper extinguishing agent zone 53a from the upper extinguishing agent zone 53a of the filter 37 at a substantially constant interval.
Is provided. The lower part of the fire extinguishing agent region 53b is made of encapsulating a fire extinguishing agent with a strip-shaped range with a width L ₂ similarly to the fire extinguishing agent region 53a of the upper described above in the height direction of the filter 37, so as to form an annular Is provided.

The filter 37 except for the extinguishing agent zones 53a and 53b constitutes a filtering zone 55 that blocks the passage of dust and allows air to pass through. The bottom wall 51 also constitutes a filtration zone.

The cleaning chamber 41 and the blower chamber 35 are separated from the partition 4
3 through a second vent 57 provided in the lower part of the blower 3, and the upper wall 59 of the blower chamber 35 is connected to the blower 33.
An exhaust port 61 of the airflow discharged by the airbag is provided.

With the above configuration, when the blower 33 is operated, the air in the blower chamber 35 is discharged to the outside through the exhaust port 61, so that the air in the cleaning chamber 41 including the dust collection duct 19 and the filtration chamber 39 is removed. The air is sucked to a negative pressure.

Therefore, dust such as spatters generated by the laser processing of the work placed on the processing table 5 of the laser processing machine 1 flows from the inside of the bed 3 through the dust collection duct 19 together with the airflow to the filtration chamber 39. Then, the dust adheres to the filter wall surface of the filter area 55 other than the extinguishing agent areas 53a and 53b of the filter 37 or falls downward.

Since the extinguishing agent zones 53a and 53b are provided partially with respect to the entire filter 37,
The function of filtering the dust by the ordinary filter 37 is not hindered.

On the other hand, the clean air that has passed through the filtration zone 55 of the filter 37 rises inside the cylindrical body of the filter 37 and flows from the first vent 47 of the filtration chamber 39 into the upper part of the cleaning chamber 41. Further, the clean air descends through the space 63 between the side wall surface of the filtration chamber 39 and the partition wall 43, and the partition wall 4
The gas flows into the blower chamber 35 from the second ventilation port 57 at the lower part of the nozzle 3, and is discharged to the outside through the exhaust port 61 by the blower 33.

If the dust adhered to the filter 37 is hot and the dust itself ignites and a fire occurs in the filter 37, the filter 37 is damaged by the fire.
At this time, the extinguishing agent in the extinguishing agent region 53 previously sealed in the filter 37 collapses and falls, and the falling fire extinguishing agent extinguishes the lower fire. In other words, the initial fire extinguishing is performed early after the occurrence of the fire.

Since the fire extinguishing agent zone 53b is also provided in the middle of the filter 37 in the height direction so as to form an annular shape, the filter 3 below the intermediate fire extinguishing agent zone 53b is provided.
7, when a fire occurs from the filtration zone 55, the middle fire extinguishing agent zone 53b is broken and falls down earlier than the upper fire extinguishing agent zone 53a. The fire extinguishing action is performed earlier than the area 53a.

Therefore, the above-described upper extinguishing agent zone 53
The plurality of fire extinguishing agent zones 53 are provided substantially parallel to each other at appropriate intervals downward from the point where the fire extinguishing agent in the nearest fire extinguishing agent zone 53 drops upward from the place where the fire occurred and the initial fire extinguishing action is performed. Since the initial fire extinguishing is performed very quickly after the occurrence of the fire, it is even more effective.

When a fire occurs in the filter 37,
Since the filter 37 in the portion above the fire occurrence location is destroyed, it is the fire extinguishing agent in the fire extinguishing agent zone 53 located above the fire occurrence location since the fire extinguishing action is actually performed. It is desirable to be provided at the upper part of the filter 37, and it is particularly desirable to be provided at the uppermost position of the filter 37.

The present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes. In the example of this embodiment, a laser processing machine has been described as an example of a plate processing machine, but other plate processing machines such as a plasma processing machine may be used.

In the above-described embodiment, the filter 37 having a cylindrical shape is described as an example. However, the present invention is also effective for a filter 37 having a flat plate shape. It is applicable even if it exists.

Furthermore, the fire extinguishing agent zone 53 of the above-described filter 37 has been described as a continuous band having a width in the height direction, but may be intermittent or the entire surface of the filter 37 may be dotted. The location, range, size, and the like of the fire extinguishing agent region 53 are not particularly limited.

[0045]

As can be understood from the above embodiment, according to the first aspect of the present invention, since the fire extinguishing agent is provided in a part of the filter, the filtering action of the dust by the ordinary filter is reduced. If a fire does occur in the filter without being hindered, the filter will be damaged by this fire.
At this time, the fire extinguishing agent previously sealed in the filter falls, and the initial fire extinguishing of the fire can be automatically and effectively performed.

According to the second aspect of the present invention, similarly to the effect of the first aspect, the fire extinguishing agent is provided in a part of the filter, so that the filtering action of the dust by the ordinary filter is not hindered. If a fire occurs in the filter, the fire will damage the filter.At this time, the fire extinguishing agent that has been previously sealed in the extinguishing agent area of the filter will fall and automatically and effectively perform the initial fire extinguishing of the fire. Can be.

According to the third aspect of the present invention, if the fire extinguishing agent area is provided at the upper part of the filter, more preferably at the uppermost part, the fire extinguishing agent in the fire extinguishing agent area falls down when a fire occurs, and Can efficiently act on the filter in which the fire has occurred, and the initial fire extinguishing can be automatically and effectively performed.

According to the fourth aspect of the present invention, since a plurality of fire extinguishing agent regions are provided substantially parallel to each other in the height direction of the filter at appropriate intervals, the fire extinguishing agent closest to the upward direction from the place where the fire occurred. Since the fire extinguishing agent in the area falls to perform the initial fire extinguishing, the initial fire extinguishing can be performed earlier than the time of the fire.

According to the fifth aspect of the present invention, when the filter has a cylindrical shape, an annular fire extinguishing agent region is provided for the reason shown in the effects of the third and fourth aspects. Thereby, the initial fire extinguishing can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of a cross section of a main part schematically showing a dust collector of the present invention.

FIG. 2 is a perspective view of a filter of the present invention.

FIG. 3 is a side view of the laser beam machine according to the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laser processing machine 3 Bed 5 Processing table 15 Laser processing head 17 Cutting roller 19 Dust collecting duct 21 Dust collecting device 31 Dust collecting device main body 33 Blower 35 Blower room 37 Filter 39 Filtration room 41 Clean room 43 Partition wall 53a, 53b Fire extinguisher Area 55 Filtration area

Claims (5)

[Claims] 1. A dust generated when processing a work placed on a processing table of a sheet metal processing machine is sucked into a dust collector main body through a dust collecting duct together with an air current. Is attached to a filter in the main body of the dust collector, and the air flow passing through the filter is discharged to the outside of the main body of the dust collector. And extinguishing the fire with the extinguishing agent when a fire occurs. 2. A dust generated when processing a work placed on a processing table of a sheet metal working machine is sucked into a dust collecting device main body through a dust collecting duct together with an airflow. To a filter in the main body of the dust collector, and the airflow passing through the filter is discharged to the outside of the main body of the dust collector, wherein the extinguishing agent is applied in a band-shaped range having a width in the height direction of the filter. An automatic fire extinguisher for a dust collector, wherein a fire extinguisher area enclosing a filter is provided in a part of the filter. 3. The automatic fire extinguisher according to claim 2, wherein the fire extinguishing agent area is provided above the filter. 4. The fire extinguishing agent area is provided above the filter, and a plurality of fire extinguishing agent areas are provided below the upper fire extinguishing agent area and substantially in parallel with appropriate intervals. 2. The automatic fire extinguisher of the dust collector according to 2. 5. The filter according to claim 2, wherein the filter has a tubular shape, and the fire extinguishing agent region is provided in the tubular shape so as to form an annular shape. Automatic fire extinguisher of the dust collector described.