JP2847268B2 - Cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an efficient arrangement of air pipes used in a cutting device for cutting a sheet material such as cloth.

[0002]

2. Description of the Related Art In order to cut a flexible sheet material such as cloth into a predetermined shape, an automatically controlled cutting device is used. In this cutting device, a carry-in table section, a cutting section, and a carry-out table section are arranged on the upper surface of the apparatus, and a pipe is connected between an air suction device provided inside or the like and a filter. The cutting section uses an endless belt conveyor structure, and is provided with a suction-type cleaner in order to prevent clogging of the conveyor.

The carry-in table section and the carry-out table section are
Conventionally, in order to convey the sheet material in a slightly floating state, air is ejected from a large number of small holes provided on the table surface.

The cutting section has a structure in which the sheet material is sucked to the table surface in order to fix the sheet material. Further, the cleaner has a structure that removes thread waste clogged in the conveyor by suction. The carry-in table section and the carry-out table section require a compressed air source, and the cutting section and the cleaner require an air suction device and a filter.

[0005] Therefore, it is proposed to use a part of the air suction device and the filter because they are inefficient in terms of space and cost if they are respectively provided with the air suction device and the filter. For example,
Japanese Patent Publication No. 62-50280 discloses a configuration in which an air suction device for a cutting section and a cleaner is used in common, and a compressed air source for a transfer table is separately provided. Here, the technical idea of sharing the air suction device and the compressed air source is not disclosed.

[0006]

Problems to be Solved by the Invention Japanese Patent Publication No. Sho 62-5028
In the conventional cutting apparatus such as No. 0, the apparatus cannot be shared any more, so that there is a problem that efficiency is still low in terms of space and cost. Therefore, in order to use the air suction device and the compressed air source more efficiently, not only the problem that the air flow needs to be reversed but also the flow rate of the suction air used for the cutting device is reduced by the compressed air of the transfer table. A problem arises that the flow rate is too large for the source.

[0007] If the capacity of the blower is constant, the suction force may be too high depending on the cutting conditions, and it is necessary to provide a valve for adjusting the pressure in JP-A-60-52299.
However, this is not energy efficient. In order to solve these problems, in the present invention, the air suction device of the cutting unit and the cleaner is shared, and the air suction device is also intended to be used as a compressed air source for the transfer table. A special piping configuration and a control device are prepared.

[0008]

In a cutting apparatus according to the present invention, a conveying air table configured to blow air from a table surface and a breathable air table for mounting and conveying a sheet material to be cut are provided. In a cutting device including a cutting unit having an endless belt conveyor, a cleaner for sucking deposits on the endless belt conveyor, and a blower for sucking air from a suction port and exhausting air from an exhaust port, the suction port of the blower A suction switching mechanism for switching and connecting to the cutting portion or the cleaner, an exhaust supply pipe for supplying an exhaust port of the blower to an air table, and a rotation for controlling the number of rotations of the blower to control the amount of suction and exhaust. A means of providing a number control device was taken.

Further, the exhaust supply pipe may include an exhaust switching mechanism for switching between supplying the exhaust gas from the exhaust port to the air table and discharging the exhaust gas to the outside.

[0010]

As described above, according to the cutting apparatus of the present invention,
Since a suction pipe switching mechanism is provided for sucking air between the cutting portion and the cleaner, the blower can be shared. Further, since the pipe for supplying the exhaust air of the blower to the air table is provided, the blower can be used also as an air source for the air table.

In order to obtain an appropriate suction amount or discharge amount, the rotation speed control device of the blower is provided, and the blower and the suction switching mechanism are systematically controlled by the control device. Further, the exhaust switching mechanism of the exhaust supply pipe switches between supplying the air from the exhaust port to the air table and discharging the air to the outside, and discharging the air to the outside when the air table is not operated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cutting device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall view of the cutting device, and FIG. 2 is a piping diagram of a main part of the cutting device.

1 and 2, reference numeral 1 denotes a cutting device, 2 denotes a cutting unit, 3 denotes a carry-in table, 4 denotes a carry-out table, and 51,
52 and 53 are filter boxes having a built-in suction switching mechanism. The cutting unit 2 is an endless belt conveyor 24.
And is divided into three suction chambers 21, 22, 23.

The suction chamber 21 is provided with a filter box 51.
The air outlet 512 of the filter box 51 is connected to the suction port of the blower 61 by piping. The suction chamber 22 is connected to the air inlet 521 of the filter box 52 by piping, and the air outlet 522 of the filter box 52 is connected to the suction port of the blower 62 by piping. The suction chamber 23 is connected to the air inlet 531 of the filter box 53 by piping, and the air outlet 532 of the filter box 53 is connected to the suction port of the blower 63 by piping.

The filter boxes 51, 52, 53
3 is shown in FIG. 3 and will be described in detail with reference to FIG. B in FIG. 3 indicates the filter boxes 51, 52, 53.
Is shown. The filter box B includes a first air inlet B1 connected to the suction chamber, a second air inlet B3 connected to the cleaner 7, an air outlet B2 connected to the blower, and an exhaust outlet B4 open to the outside. I have.

D1 is a first pressure sensor for detecting the pressure on the first air inlet B1 side of the filter box B;
D2 is a second pressure sensor that detects the pressure on the air outlet B2 side of the filter box B.

V1 is a check valve which has a backflow prevention structure which opens and closes in accordance with the flow of air, ie, forward / reverse rotation of the blower. V2 is an L-shaped on-off valve as a suction switching mechanism, which is driven to rotate about 90 degrees by a switching motor M, and has two positions, a cleaner suction state shown by a solid line and a cutting section suction state shown by a dashed line. Switching is controlled.

V3 is a check valve, which has a backflow prevention structure that opens and closes according to the flow of air, that is, the reverse rotation / forward rotation of the blower. The air inlet B1 communicates with the suction chamber B5, and the suction chamber B5 is connected to one of the suction chambers 21, 22, and 23.

The cleaner 7 is for sucking and removing lint and the like adhering to the conveyor 24, and is connected to a second air inlet 533 of the filter box 53 by a suction pipe. The cleaner 7 may be connected to the filter boxes 51 and 52 as well. An exhaust port of the blower 63 is connected to an air chamber of the carry-in table 3 via an exhaust box 31 as an exhaust switching mechanism. The exhaust box 31 switches the exhaust from the blower 63 to an exhaust port 311 and a table side connection port 312.

The outlet of the blower 61 is connected to the discharge table 4 via an exhaust box 41 as an exhaust switching mechanism.
The pipe is connected to the air chamber. The exhaust box 41
Is to switch the exhaust from the blower 61 to the exhaust port 411 and the table side connection port 412.

In FIG. 9, reference numeral 8 denotes the blowers 61, 6;
An inverter controller that controls the on / off control, the rotation speed control, and the forward / reverse rotation control by the blower control circuit 9. The blower control circuit 9 is provided in each of three sets of filter boxes. Based on pressure signals from the first pressure sensor D1 and the second pressure sensor D2 provided in each of the filter boxes, the blower control circuit 9 is provided. The blowers 61, 62, 63 are controlled via the controller 8.

A block diagram of the blower control circuit 9 will be described with reference to FIG. When an arbitrary pressure value is set in the pressure setting section 91, a signal corresponding to the set pressure is output. The signal and the first pressure sensor D1 are compared in the comparison operation unit 92, and if there is a difference between them, a difference signal is output. Upon receiving the difference signal, the frequency control unit 93 changes the frequency signal corresponding to the difference signal, controls the rotation speed of the blower motor via the inverter controller 8, and controls the first pressure sensor by the suction force of the blower. Control is performed so that the pressure detected by D1 matches the pressure set in the setting unit 91.

The controller 90 controls the blower control circuit 9, the L-shaped on-off valve V2 provided in each filter box as a suction switching mechanism, the switching motor M, and the exhaust boxes 31, 41 as the exhaust switching mechanism. You.

The functions of the cutting apparatus of the present invention having the above-described structure, such as cleaning the filter box, loading, cutting, and unloading the sheet material will be described.

FIG. 4 shows the flow of air when dust such as lint accumulated in the filter box is removed. At this time, the exhaust box 31 is switched to the exhaust port 311 side, the air inlet 531 and the air inlet 533 of the filter box 53 are closed, and when the blower 63 is reversed, the filter box 53 is reversed by the air sucked from the outside. Since washing is performed, dust such as lint sucked together with air from the cleaner 7 and each suction chamber is discharged to the outside through the discharge port 534.

At this time, the reverse rotation control of the blower 63 is controlled by the inverter controller 83.

FIG. 5 shows the flow of air when a sheet material is carried in. When loading the sheet material, the blower 6
3 is driven forward at a low speed, and the L-shaped on-off valve V2 is operated by the switching motor M provided in the filter box 53, so that the filter box 5 is operated.
The third air inlet 531 is closed, and the air inlet 533 is opened. At the same time, the exhaust box 31 is switched to the table side outlet 312 by the exhaust box 31.

At this time, the air sucked from the cleaner 7 enters the filter box 53 through the air inlet 533, the lint and the like are captured and sucked into the blower 63 from the air outlet 532, and the exhaust gas is exhausted into the exhaust box 31. Is supplied to the carry-in table 3 from the table-side outlet 312 through the exhaust supply pipe 32 and is blown out from the blow-out hole. Therefore,
The lint and the like on the conveyor 24 are eliminated and captured by the filter box 53, and the sheet material is floated on the carry-in table 3 to facilitate carry-in.

FIG. 6 shows the flow of air when cutting in the suction chamber 23. At this time, the blower 63 is operated at a rotation speed at which the pressure set by the blower control circuit 9 is obtained in order to sufficiently obtain the suction force in the cutting section 2.
At this time, the air inlet 53 of the filter box 53
1 is opened, the air inlet 533 is closed, and the exhaust box 31 is switched to the exhaust port 311 side.

The air sucked from the suction chamber 23 is trapped in the filter box 53 to trap lint and the like, and is exhausted to the outside through the exhaust port 311 of the exhaust box 31.

In the state where the sheet is cut in the suction chamber 23, since the cut portion is small, the pressure in the suction chamber 23 is reduced even at the same rotation speed, and the suction force on the sheet material is increased from an appropriate state. Then, the pressure change due to the reduced pressure is
Detected by the first pressure sensor D1, the comparison operation unit 9
The frequency output from the frequency control unit 93 is reduced by being compared with the set pressure in 2. Therefore, the rotational speed of the blower motor decreases, and the suction force of the blower decreases, so that the reduced pressure state of the suction chamber 23 is restored and returns to an appropriate state. At this time, since the rotation speed of the blower motor is reduced, power consumption can be reduced.

Conversely, if the suction force on the sheet material in the suction chamber 23 falls below an appropriate state, the first pressure sensor D1 detects an insufficient pressure reduction, and the rotational speed of the blower motor is increased to further reduce the pressure. Then, the suction force of the blower is increased to return the suction force to the sheet material to an appropriate state. Therefore, there is no shortage of suction force, and stable cutting can be performed.

Thus, the first pressure sensor D
Since the pressure detected in 1 is always controlled to the set pressure, the pressure is not reduced too much. Therefore, the waste does not generate a suction force, so that there is an effect that power consumption can be reduced. In addition, since there is no shortage of suction force, stable cutting can be always performed. Such control of the blower is the same for the blowers 62 and 61.

When the cutting area moves from the suction chamber 23 to the suction chamber 22, the blower 63 is stopped and the blower 62 is rotated forward. At this time, the air sucked in the suction chamber 22 is trapped by the filter box 52 and exhausted.

FIG. 7 shows the flow of air when the cutting area has moved from the suction chamber 22 to the suction chamber 21. At this time, the blowers 62 and 63 stop and only the blower 61 rotates forward. The air inlet 511 of the filter box 511 is opened, the air inlet 513 is closed, and the exhaust box 41 is switched to the exhaust port 411 side.

The air sucked from the suction chamber 21 is trapped in the filter box 51 to catch lint and the like, and is exhausted to the outside from the exhaust port 411 of the exhaust box 41.

FIG. 8 shows the flow of air when the sheet material after the cutting is carried out. When the sheet material is carried out, the blower 61 is rotated forward at a low speed, and the air inlet 511 of the filter box 51 is closed.
The air inlet 513 is opened, and the exhaust box 41 is switched to the table side outlet 412 side. At this time, the air sucked from the cleaner 7 enters the filter box 51 through the air inlet 513, traps lint and the like, is sucked into the blower 61 from the air outlet 512, and the exhaust is discharged from the table side of the exhaust box 41. Exhaust supply pipe 42 from outlet 412
And is supplied to the carry-out table 4 through the blow-out hole.

Accordingly, the lint and the like on the conveyor 24 are eliminated and captured by the filter box 51.
In the carry-out table 4, the sheet material is floated to facilitate carrying out.

As described above, according to the cutting device, the suction force for the cutting device 2, the compressed air for the air table 3 for carrying in, and the cleaner 7 for cleaning the conveyor 24. Can be shared by one blower 63, so that the number of necessary devices is reduced, and an extremely efficient cutting device can be provided in terms of space and cost. Is obtained.

Further, generation of suction force for the cutting device 2, generation of compressed air for the air table 4 for carrying out, and generation of suction force for the cleaner 7 for cleaning the conveyor 24 Since it can be shared by one blower 61, the number of necessary devices is reduced, and an effect is obtained that a very efficient cutting device can be provided in terms of space and cost.

The cutting device 2 is divided into three cutting areas, and the suction chamber 2 is divided according to each cutting area.
Since 1, 2, and 23 are separately sucked, useless suction energy is not required. Further, by reversing the blowers 61 and 63, the filter can be cleaned.

Since the above-mentioned various operation patterns are systematically controlled based on the control program of the control device 9, the efficient cutting operation can be performed by eliminating unnecessary blower operation and wasted time. It is possible to do. Further, since the rotation speed of each blower is controlled by the inverter controller to control the suction force to be constant, a sufficient suction force can be obtained, and wasteful power consumption can be suppressed and an energy saving effect can be obtained.

[0043]

As described above, according to the cutting apparatus of the present invention, a suction switching mechanism is provided in the filter box in order to share the air suction blower of the cutting section and the cleaner. Since the piping is used as the air source for the air blower, one blower can be used as the air source for the cut table, the cleaner, and the air table. In addition, in order to obtain an appropriate suction amount or discharge amount, a blower rotation speed control device is provided.

Therefore, the number of necessary devices for the cutting device is reduced, and the effect that a very efficient cutting device can be provided in terms of space and cost can be obtained. In addition, an energy saving effect can be obtained by lowering the rotation speed of the blower in order to prevent the suction force from excessively increasing.

Also, when the air table is not operated, the exhaust is discharged to the outside by the exhaust switching mechanism of the exhaust supply pipe, so that the control of the suction force of the blower can be increased or decreased independently of the operation of the air table. , Suitable driving becomes possible.

[Brief description of the drawings]

FIG. 1 is an overall view of a cutting device of the present invention.

FIG. 2 is a piping diagram of a main part of the cutting device.

FIG. 3 is an explanatory view showing a structure of a filter box in the cutting device.

FIG. 4 is an explanatory view showing the flow of air when cleaning the filter in the cutting device.

FIG. 5 is an explanatory diagram showing a flow of air when the cutting device is carried in.

FIG. 6 is an explanatory view showing an air flow at the time of cutting in the cutting device.

FIG. 7 is an explanatory view showing a flow of air at the time of cutting in the cutting device.

FIG. 8 is an explanatory view showing a flow of air when the cutting device is carried out.

FIG. 9 is a block diagram around a blower control circuit in the cutting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting device 2 Cutting part 3 Loading table (air table) 31 Exhaust switching mechanism 32 Exhaust supply pipe 4 Unloading table (air table) 41 Exhaust switching mechanism 42 Exhaust supply pipe 51 Filter box (suction switching mechanism) 52 Filter box (suction switching) 53) Filter box (suction switching mechanism) 61 Blower 62 Blower 63 Blower 7 Cleaner 8 Inverter controller (rotation speed controller) 9 Blower control circuit B Filter box S Sheet material V2 Switching valve (Suction switching mechanism)

Claims (2)

(57) [Claims] 1. A conveying air table configured to blow air from a mounting surface of a sheet material, a cutting unit having a gas permeable table for mounting a sheet material to be cut, and the cutting unit. A cleaner that sucks the adhering matter of the air, a blower that exhausts the air sucked through the suction port from the exhaust port, a suction switching mechanism that switches and connects the suction port to the cutting section or the cleaner, A cutting device, comprising: an exhaust supply pipe for supplying to an air table; and a rotational speed control device for controlling the rotational speed of the blower to control the amount of suction and exhaust. 2. The cutting apparatus according to claim 1, wherein the exhaust gas supply pipe includes an exhaust gas switching mechanism for switching between supplying the exhaust gas from the exhaust port to the air table and discharging the exhaust gas to the outside. apparatus.