JP5100257B2 - Cutting machine and method for removing dust - Google Patents

Description

  The present invention relates to a cutting machine capable of removing dust generated when cutting a sheet material such as cloth of clothing according to data generated in advance and deposited on the bottom of a suction chamber, and a dust removing method thereof.

  2. Description of the Related Art Conventionally, a cutting machine includes a table-shaped cutting unit and a cutter unit that can move two-dimensionally along the table surface of the cutting unit (see, for example, Patent Document 1). The table-like surface of the cutting part becomes a cutting table, on which a sheet material such as a cloth is placed, and is cut by the cutter part. In order to hold the sheet material so as not to move when the sheet material is cut by the cutter unit, the cutting table is made to have air permeability and sucks the sheet material downward. If a sheet material having air permeability is laminated on the cutting table and the surface is covered with a non-breathable sheet such as a synthetic resin film, a plurality of the laminated sheet materials can be simultaneously suction-fixed and cut. In order to uniformly suck the sheet material on the cutting table, a suction chamber communicating with the cutting table is provided at the lower part of the cutting table, and air is exhausted by a blower from an exhaust port provided at the bottom of the suction chamber or near the bottom. Is called.

When cutting the sheet material by the cutter unit, dust such as dusty cutting waste is generated. Dust generated at the time of cutting passes through the suction chamber below the cutting table by the flow of air and is sent to a dust box following the suction chamber. A filter is provided in the dust box, and dust is collected by the filter.
Japanese Patent No. 2979181

  In order to improve the cutting efficiency of the cutting machine, it is conceivable to increase the number of sheets to be placed, the cutting table area, the cutting speed of the cutter unit, and the like. However, the generation of dust increases with the improvement of the cutting efficiency. Further, when the area of the cutting table is increased, the suction chamber is also increased. When the suction chamber becomes large, there is a possibility that dust that could not be sucked will be deposited on the bottom and the bottom including the periphery of the bottom, such as at the end or corner away from the exhaust port.

  The objective of this invention is providing the cutting machine which can remove the dust in a suction chamber effectively, and its dust removal method.

In the present invention, a suction chamber whose top communicates with the cutting table is provided at the bottom of the air-permeable cutting table, and the sheet material is sucked and fixed onto the cutting table while exhausting from an exhaust port provided at the bottom of the suction chamber. In the cutting machine to cut
The suction chamber is provided with an air intake port at a position away from the exhaust port to form an air flow that introduces external air and removes dust accumulated on the bottom of the suction chamber with the exhaust port. ,
A cutting machine including an opening / closing mechanism for opening and closing the air intake port.

  Further, in the present invention, external air introduced while the air intake port is opened by the opening / closing mechanism is placed along the bottom of the suction chamber at a position facing the air intake port in the suction chamber. A guide member for guiding in a direction from the opening to the exhaust port is provided.

  In the invention, it is preferable that the opening / closing mechanism opens and closes the air intake port outside the suction chamber.

Furthermore, the present invention is a method for collecting and removing dust accumulated at the bottom of the suction chamber of the cutting machine,
In a state where at least part of the sheet material mounting surface of the cutting table is blocked, the amount of suction from the cutting table to the suction chamber is reduced, and the air intake port for introducing external air into the suction chamber is closed. Start sucking to remove
After lowering the pressure in the suction chamber below the outside air, open the air intake and introduce external air.
With external air introduced from the air intake port, an air flow is formed between the air intake port and the exhaust port of the suction chamber,
A dust removing method for a cutting machine, wherein dust accumulated on a bottom portion of a suction chamber between an air intake port and an exhaust port is guided to the exhaust port by the air flow and removed.

  Further, the present invention is characterized in that the air intake port is formed by placing a non-breathable sheet used to cover the sheet material during cutting so as to leave a part of the cutting table.

  According to the present invention, the air intake port is provided at a position away from the exhaust port of the bottom portion that performs exhaust in the suction chamber provided in the lower part of the air-permeable cutting table. When the air intake port is opened by the opening / closing mechanism, external air is introduced from the air intake port into the suction chamber. The introduced external air forms an air flow between the air intake port and the exhaust port, and the dust accumulated at the bottom of the suction chamber can be effectively removed.

  According to the present invention, the guide member for guiding the external air introduced while the air intake port is opened by the opening / closing mechanism to the bottom portion of the suction chamber is provided at the position facing the air intake port in the suction chamber. Dust can be effectively removed by an air flow formed by being guided by the guide member.

  According to the invention, the opening / closing mechanism opens and closes the air intake opening outside the suction chamber. Once the air intake port is closed, the suction chamber has a negative pressure that is lower than the outside air, and the closed state can be maintained by the pressure difference without driving the opening / closing mechanism.

Furthermore, according to the present invention, at least a part of the sheet material mounting surface of the cutting table is blocked, and the air intake port for introducing external air into the suction chamber is opened in a state where the suction amount from the cutting table to the suction chamber is reduced. External air is introduced to form an air flow between the air intake and the suction chamber exhaust. Dust that accumulates at the bottom of the suction chamber by the formed air flow can be guided to the exhaust port and effectively removed.
Further, since suction for removing dust is started in a state where the air intake port is closed, the suction chamber is exhausted and the pressure is reduced. Since the pressure in the suction chamber is set to a negative pressure lower than the outside air, and the outside air is introduced by opening the air intake port, the flow rate of the air flow formed by introducing the outside air into the suction chamber is increased, and dust is generated. It can be effectively removed.

  Further, according to the present invention, it is possible to effectively remove dust by changing the mounting state of the non-breathable sheet used to cover the sheet material during cutting and forming an air intake port.

  FIG. 1 shows a schematic configuration of a cutting machine 1 as an embodiment of the present invention. The cutting machine 1 includes a cutting table 2 on which a sheet material 1a such as a cloth is stacked and placed. A suction chamber 3 is provided below the air-permeable cutting table 2. The top of the suction chamber 3 communicates with the cutting table 2, and the bottom exhaust port 4 a is connected to the blower 6 through the dust box 4 and the exhaust pipe 5. When the blower 6 is driven, the air in the suction chamber 3 is discharged from the exhaust port 4a through the exhaust pipe 5 and the dust box 4. When the air in the suction chamber 3 is discharged, outside air is sucked into the suction chamber 3 from above the cutting table 2.

  The cutting table 2 is generally formed on the top of a box-shaped frame 7, and the main part is occupied by the surface of the conveyor 8. The surface of the conveyor 8 is formed by the bristles of the brush 9 and has air permeability. The brush 9 is implanted with bristles formed of an elastic material such as synthetic resin. Since the conveyor 8 formed by disposing the brush 9 has air permeability, a suction air flow 10 is formed in the suction chamber 3 by sucking outside air from the surface of the cutting table 2. The suction air flow 10 directly flows into the exhaust port 4 a provided at the bottom of the suction chamber 3 through the internal space of the suction chamber 3 through a path as indicated by a dashed arrow. When the sheet material is placed on the cutting table 2, the suction air flow 10 decreases. When placing a plurality of sheet materials 1a such as cloth on the cutting table 2, the whole is covered with a non-breathable sheet 1b. When the cutting table 2 is completely covered with the non-breathable sheet 1b, the suction air flow 10 is blocked.

  The suction chamber 3 is formed in a box shape such that the cutting table 2 is rectangular. The longitudinal direction of the rectangle coincides with the conveying direction of the conveyor 8. In FIG. 1, the longitudinal direction of the cutting table 3 is shown as a horizontal direction. The suction chamber 3 is provided with air intake ports 11 and 12 on both side surfaces in the longitudinal direction. The air intake ports 11 and 12 can be opened and closed by opening and closing mechanisms 13 and 14 provided outside the suction chamber 3, respectively. Inside the suction chamber 3 facing the air intake ports 11 and 12, guide members 15 and 16 for guiding the external air flow taken in from the air intake ports 11 and 12 to the bottom surface side of the suction chamber 3 are provided. The opening / closing mechanisms 13 and 14 place the sheet material 1a and the non-breathable sheet 1b on the cutting table 2 and close the air intake ports 11 and 12 to cut off the introduction of outside air while cutting. ing.

  In the cutting machine 1, the cutter unit 17 moves two-dimensionally on the surface of the cutting table 2 to cut the sheet material 1 a. The cutter unit 17 includes, for example, a cutting blade 18a that repeatedly moves up and down, and a cutting head 18b that moves two-dimensionally according to the cutting data. The bristle tip of the brush 9 that becomes the surface of the cutting table 2 escapes from the cutting blade 18a of the cutter unit 17 while supporting the sheet material 1a.

  Since the non-breathable sheet 1b is cut together with the sheet material 1a by the cutting blade 18a, the cut portion has air permeability, air leaks, and the suction force decreases. In order to prevent such a reduction in the suction force, the non-breathable sheet 17a can be entrained in the cutter unit 17. For example, the cutting of the sheet material 1a starts from the carry-in side to the cutting table 2, and the cut data is created so as to end sequentially on the carry-out side. If a stand 17c that holds the roll 17b of the non-breathable sheet 17a while being urged in the winding direction is installed on the carry-in side, the leading end of the non-breathable sheet 17a is taken by the cutter unit 17 and the sheet after cutting is completed. The material 1a and the non-breathable sheet 1b can be covered.

  The operation of removing dust accumulated on the bottom of the suction chamber 3 with the cutting machine 1 is preferably performed before starting the cutting operation, for example. The blower 6 is operated, and the cutting table 2 is covered with a non-breathable sheet 17a and the like, and the opening and closing mechanisms 13 and 14 are operated to open the air intake ports 11 and 12 in a state where the suction air flow 10 is reduced. Then, the external air 19 is introduced into the suction chamber 3 in a negative pressure state. The external air 19 introduced into the air intake ports 11 and 12 forms a dust removal air flow 20 that flows along the bottom of the suction chamber 3 and is sucked into the blower 6 through the exhaust port 4a. The dust removing air flow 20 moves the dust accumulated at the bottom of the suction chamber 3 to the exhaust port 4 a side and drops it into the dust box 4 to collect the dust. Prior to operation of the blower 6, the air intake ports 11 and 12 can be opened by the opening / closing mechanisms 13 and 14.

  FIG. 2 shows a configuration in the vicinity of the air intake 12 of FIG. The configuration near the air intake 11 in FIG. 1 is basically the same. The air intake 12 is provided on the wall surface at the end of the suction chamber 3. An opening / closing mechanism 14 is disposed around the air intake 12 and outside the suction chamber 3.

  An inclined surface of the guide member 16 is disposed at a position facing the air intake 12 inside the suction chamber 3. The external air introduced by opening the air inlet 12 by the opening / closing mechanism 14 hits the slope of the guide member 16 and easily forms an air flow along the bottom of the suction chamber 3. Also for the guide member 15 shown in FIG. 1, an appropriate shape is selected according to the position of the air intake port 11.

  The opening / closing mechanism 14 includes a pad 21, a holding member 22, a swing member 23, a swing shaft 24, a pulley 25, a belt 26, a pulley 27, and a motor 28. The pad 21 is made of an elastic material such as rubber and is held by a holding member 22. The holding member 22 is attached to the distal end side of the arm of the swing member 23. The swing member 23 is attached near the tip of the swing shaft 24. The swing shaft 24 is driven from the pulley 27 via a toothed belt 26 that is stretched around the pulley 25. The pulley 27 is attached to the output shaft 29 of the motor 28. When the output shaft 29 is displaced counterclockwise in the state shown in the figure, the swing member 23 is angularly displaced by an angle θ of, for example, about 20 °. By the angular displacement of the swing member 23, the pad 21 can be switched from the state in which the pad 21 is in close contact with the air intake 12 to the state in which the air intake 12 is opened.

  The state in which the pad 21 of the opening / closing mechanism 14 closes in close contact with the air intake 12 is maintained even by the suction force due to the pressure difference if the inside of the suction chamber 3 becomes negative with respect to the outside. If the suction chamber 3 side has a negative pressure, the closed state of the opening / closing mechanism 14 can be maintained even if the rotational driving force from the motor 28 is not applied.

  In FIG. 2, the motor 28 that derives the rotational driving force is used as the driving source of the opening / closing mechanism 14, but the opening / closing mechanisms 13, 14 of FIG. 1 can also use other actuators as driving sources. For example, a solenoid may be used as the actuator. The actuator may be operated not only by electric power but also by air pressure or hydraulic pressure.

  When a plurality of air intakes 12 are provided in the depth direction in the figure, the pad 21 can also be extended in the depth direction so that all the air intakes 12 can be opened and closed simultaneously. Since the plurality of air intakes 11 are opened and closed with one drive source, the configuration of the control system can be simplified, and the size and cost can be reduced. In addition, an opening / closing mechanism 14 including a pad 21 may be provided for each air intake port 12 so as to open / close individually.

  FIG. 3 schematically shows a method of removing dust accumulated on the bottom including the bottom surface 3a of the suction chamber 3 and the periphery of the bottom surface 3a. In the cutting machine 1 shown in FIG. 1, although the conveyor 8 is provided under the cutting table 2, illustration is abbreviate | omitted. The conveyor 8 can carry in the sheet material to cut from the upstream side of the cutting table 2, and can carry out the cut parts downstream in the cutting direction. Note that loading and unloading by the conveyor 8 are performed when cutting is stopped. A cutting machine that does not include the conveyor 8 and only cuts the sheet material on the stationary cutting table 2 is also used.

  The dust box 4 is provided at both ends in the width direction near the middle in the longitudinal direction of the bottom of the suction chamber 3. The air intake ports 11 and 12 are formed at a plurality of locations on the side surfaces at both ends in the longitudinal direction of the suction chamber 3. If the cutting table 2 is made non-breathable and only one of the air intakes 11 is opened and the other is closed, the outside air 19 is sucked from the open air intake 11 and the suction chamber 3 A dust removal air flow 20 up to the exhaust port 4a can be generated at the bottom. The dust removal air flow 20 collects dust accumulated on the bottom surface 3 a in the dust box 4 and exits from the dust box 4 to the lower side of the suction chamber 3 as an exhaust flow 5 a.

  If the opening / closing mechanism 14 is provided for each of the plurality of air intake ports 11 and the position at which the air intake ports 11 are sequentially opened from one end side to the other end side is shifted, the position of the dust removal air flow 20 is also sequentially changed, and the suction chamber 3 bottoms can be cleaned sequentially. Even if the combination of opening positions is changed, the bottom can be cleaned. Since the air intake 11 is opened and closed by a separate drive source, only the air intake 11 at an arbitrary position can be opened. If the position, combination, and order of opening the air intake port 11 are appropriately set, the dust collection efficiency can be improved by a large suction effect.

  When the cutting table 2 is covered with the non-breathable sheets 1a and 17a without providing the air intake ports 11 and 12 in the suction chamber 3, a part not covered is provided to form an air intake port. If the operation of changing the position is performed, dust can be removed from the bottom of the suction chamber 3. For example, in the cutting machine 1 of FIG. 1, the cutter unit 17 is moved to the end on the carry-in side, and the non-breathable sheet 1 b is covered from the carry-out side to the front of the cutter unit 17 except for a part on the carry-in side. If the non-breathable sheet 1b is used in this way, the air on the cutting table 2 is mostly blocked, the external air introduced from the opening on the carry-in side is guided to the bottom of the suction chamber 3, and the air along the bottom to the exhaust port 4a. A flow can be formed to remove dust. That is, the opening formed on the carry-in side can be used as an air intake port. Next, when the conveyor 8 is operated to send out the non-breathable sheet 1b to the carry-out side and the cutter unit 17 is also moved to the carry-out side, the cutting table is formed by the non-breathable sheet 17b entrained to the cutter unit 17 from the carry-in side. Most of the top of 2 can be closed, and an air intake can be formed on the carry-out side.

In FIG. 3, the dust box 4 is divided into two parts. Thus, when a plurality of dust boxes 4 are provided, the dust removal air flow formed at the bottom between the air intake ports 11 and 12 and the exhaust port 4a even if the dust box 4 for guiding the dust is selectively switched. 20 positions can be changed.
FIG. 4 shows a simplified configuration for removing dust accumulated on the bottom surface of the suction chamber. Fig.4 (a) shows the structure of the cutting machine 1 of FIG. In some cases, the cutting waste or the like once stays at the bristle root of the brush 9. When the brush 9 is directed downward, cutting scraps remaining at the base of the bristles fall and accumulate on the bottom surface 3a of the suction chamber 3 and the like. The dust removal air flow 20 can also collect and remove the cutting scraps falling from the conveyor 8 in the dust box 4.

  FIG. 4B shows a configuration in which a suction chamber 33 provided with air intake ports 31 and 32 at both ends in the conveying direction of the conveyor 8 is provided inside the conveyor 8 as the cutting machine 30. Even with such a configuration, the dust removal air flow 20 can be generated to effectively remove the dust.

  Although the cutting machines 1 and 30 are provided with only one suction chamber 3 and 33, they can be divided into a plurality of like the patent document 1. Moreover, although the air intake ports 11, 12; 31, 32 are provided on the side walls of the end portions of the suction chambers 3, 33, dust can be effectively removed by an air flow formed between the air intake ports 4a. If it is the position which can do, it can also provide in other positions, such as the bottom face 3a. Further, the cutter unit 17 in FIG. 1 cuts the sheet material 1a with the cutting blade 18a that reciprocates linearly, but the sheet material may be cut with a round blade that rotates and cuts.

It is the simplified side sectional view showing the schematic structure of cutting machine 1 as one embodiment of the present invention. It is side surface sectional drawing which shows the structure of the air inlet 12 vicinity of FIG. It is the simplified perspective view which shows roughly the method of removing the dust deposited on the bottom face 3a etc. of the suction chamber 3 of FIG. It is side surface sectional drawing which simplifies and shows the structure which removes the dust deposited on the bottom face etc. of a suction chamber with the cutting machine 1 of FIG. 1 and the cutting machine 30 as other form of implementation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,30 Cutting machine 1a Sheet material 1b, 17a Non-breathable sheet 2 Cutting table 3,33 Suction chamber 3a Bottom surface 4 Dust box 4a Exhaust port 5 Exhaust pipe 5a Exhaust flow 6 Blower 8 Conveyor 10 Suction air flow 11, 12; 32 Air intake port 13,14 Opening / closing mechanism 15,16 Guide member 19 External air 20 Dust removal air flow

Claims (5)

A cutting machine that has a suction chamber with the top communicating with the cutting table at the bottom of the air-permeable cutting table, and evacuates from the exhaust port provided at the bottom of the suction chamber, while the sheet material is sucked and fixed onto the cutting table. In
The suction chamber is provided with an air intake port at a position away from the exhaust port to form an air flow that introduces external air and removes dust accumulated on the bottom of the suction chamber with the exhaust port. ,
A cutting machine comprising an opening and closing mechanism for opening and closing the air intake port.   Outside air that is introduced while the air intake opening is opened by the opening / closing mechanism is located at a position facing the air intake opening in the suction chamber from the air intake opening along the bottom of the suction chamber. The cutting machine according to claim 1, further comprising a guide member that guides in a direction toward the front.   The cutting machine according to claim 1 or 2, wherein the opening / closing mechanism opens and closes the air intake port outside the suction chamber. A method of collecting and removing dust accumulated at the bottom of a suction chamber of a cutting machine,
In a state where at least part of the sheet material mounting surface of the cutting table is blocked, the amount of suction from the cutting table to the suction chamber is reduced, and the air intake port for introducing external air into the suction chamber is closed. Start sucking to remove
After lowering the pressure in the suction chamber below the outside air, open the air intake and introduce external air.
With external air introduced from the air intake port, an air flow is formed between the air intake port and the exhaust port of the suction chamber,
A dust removing method for a cutting machine, characterized in that dust accumulated at the bottom of a suction chamber between an air intake port and an exhaust port is guided by the air flow to the exhaust port and removed.   5. The cutting machine according to claim 4, wherein the non-breathable sheet used to cover the sheet material during cutting is placed so as to leave a part of the cutting table to form the air intake port. Dust removal method.

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