JPH07178695A - Sheet cutting device - Google Patents

Abstract

PURPOSE:To improve reliability, in a device by which accurately conveying a sheet and cutting it while conveyed can be attained without generating deflection in the sheet even when it is cut. CONSTITUTION:A device comprises a conveying mechanism 4 for delivering a sheet 1 conveyed to be driven running in a prescribed direction, running table 10 runnably supported in parallel to the sheet conveyed running by this conveying mechanism and a cutter mechanism 14 provided in this running table to cut the sheet. The device has a feed mechanism 9 for driving the running table to run parallelly to the sheet and a control part 7 supervising conveying the sheet, controlling the feed mechanism so that a relative speed between a running speed of the running table and a conveying speed of the sheets is generated zero and controlling an operation of the cutter mechanism by taking the timing where the relative speed is generated zero.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a winding device for winding sheets of a flexible material such as a synthetic resin film. The present invention relates to a sheet cutting device for cutting sheets.

[0002]

2. Description of the Related Art A high-speed winding device for winding a sheet of a flexible material such as a synthetic resin film is known. In this type of device, a long sheet is wound in advance in a roll shape, which is unwound and cut into a predetermined length.

In a conventional cutting device, for example, as shown in FIG. 4, a sheet s is slid on a frame a and conveyed. Stand a
A groove b is provided on the upper surface, and a cutter mechanism C is provided facing the groove.

The cutter mechanism C comprises a cutter d having a blade portion facing the groove b via a sheet s, and a drive cylinder e for driving the cutter up and down. In this type of structure, the sheet s is cut by stopping the feeding and stopping the feeding of the sheet s, then driving the cylinder e to lower the cutter d and pressing it against the groove b provided in the pedestal a. ing.

Therefore, even if the sheet s is fed out at a high speed, it is necessary to stop the sheet conveyance each time the sheet is cut, so that it is difficult to ensure the productivity. Therefore,
JP-A-51-97886 and JP-A-51-117
As shown in Japanese Patent No. 388, a cutting device has been devised which cuts a sheet such as a paper or a film wound in a roll shape while being conveyed and traveling.

In all of these cutting devices, a rotary cutter is used as a cutter mechanism, which enables the sheet to be cut at a predetermined length while being conveyed at high speed.

Alternatively, as shown in FIG. 5, the cutting device is intended for a plate glass f. There is a device that drives k in a direction oblique to the traveling direction of the glass f to enable highly accurate cutting.

In this case, in the feeding direction of the cutter k, the relationship of sin α = feeding speed of the sheet glass f / traveling speed of the cutter k is established, so that the cutting of the glass is perpendicular to this feeding direction.

[0009]

However, in the apparatus disclosed in Japanese Unexamined Patent Publication No. 51-97886, which is described above, the rotary blade of the rotary cutter blocks the path of the conveyed sheet when the sheet is cut. However, the sheet may be bent to impair the feeding of an accurate length, and it may be impossible to convey the sheet.

On the other hand, in the configuration shown in FIG. 5, since the feeding direction of the cutter k has a relationship of sin α = feeding speed of glass sheet / cuttering speed, when the feeding speed of the glass f is changed, the cutting speed and the feeding speed are changed. Both mechanisms need to be adjusted simultaneously. This kind of adjustment is extremely difficult and unreliable.

The present invention has been made in view of such circumstances, and an object thereof is to accurately convey and convey sheets without bending even when the sheets are cut. Another object of the present invention is to provide a sheet cutting device capable of cutting while maintaining reliability.

[0012]

In order to satisfy such an object, the sheet cutting apparatus according to the present invention has a conveying mechanism for feeding and driving the sheets in a predetermined direction, and a conveying mechanism for conveying and traveling by the conveying mechanism. A traveling table movably supported at a position facing the sheets, a cutter mechanism provided on the traveling table for cutting the sheet, a feeding mechanism for driving the traveling table together with the sheets, The conveyance of sheets is monitored, the feeding mechanism is controlled so that the relative speed between the traveling speed of the traveling table and the conveying speed of the sheets becomes zero, and the cutter mechanism operates at the timing when the relative speed becomes zero. And a control unit for controlling the.

Further, the feeding mechanism has a linear guide for supporting the traveling table, a ball screw connected to the traveling table, and a servomotor for rotationally driving the ball screw.

The cutter mechanism is provided with a receiving portion that supports the conveyed sheets, and a cutter that is provided via the receiving portion and the sheets and is movable in a direction orthogonal to the sheet feeding direction. Have and.

Further, the cutter is a member which is moved in the vertical direction with respect to the sheets and cuts the sheets. One end of the cutter is rotatably supported and the other end is rotated as a free end. At least one of those for cutting sheets, the rotary blade, and the fixed blade for pressing the rotary blade to cut the sheets at a timing synchronized with the rotation of the rotary blade.

Further, the above-mentioned sheets are provided with a mark for position detection, and the above-mentioned control unit detects a detection signal from a position sensor for detecting the mark for position detection and a detection signal from an encoder for measuring the feed amount of the sheets. The feeding mechanism is controlled based on the signal.

The mark for position detection provided on the sheets is a tab protruding from the edge of the sheet, and the position sensor is arranged at a position separated from the origin position of the traveling table by a predetermined distance. A first position sensor that resets the encoder based on a signal that detects passage of a tab, and a position provided on the traveling table to detect the position of the tab along with traveling of the traveling table,
And a second position sensor that corrects the feed rate based on the signal.

[0018]

With this structure, the relative speed between the sheet and the cutter is set to zero, and the sheet is cut while being conveyed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the figure, 1 is a sheet that is a sheet,
Have flexibility. The tab 2 which is a mark for position detection protruding from the edge of the sheet at a predetermined interval in the longitudinal direction.
Is provided.

The sheet 1 has a long delivery portion 3 wound in a roll. On the delivery side of the delivery unit 3, a transport mechanism 4 that drives and transports the sheet 1 at high speed is provided.

The transport mechanism 4 has a plurality of transport rolls 5 provided at predetermined positions, a driving source (not shown here) for rotationally driving these transport rolls, and a cutting end after the sheet 1 is cut as described later. And a sheet gripping mechanism for gripping a portion and engaging the transport roll.

An encoder 6, which is a measuring instrument, is provided in the middle of the transport mechanism 4. The encoder 6 can measure the feed amount of the sheet by measuring the rotation of the transport roll 5 that contacts the sheet 1 and rotates without slipping. The measurement signal is a control signal electrically connected to the encoder. Output to the unit 7.

On the other hand, a feed mechanism 9 is provided in parallel with and parallel to the main transport path 8 of the transport mechanism 4. The feed mechanism 9 reciprocally drives a traveling table 10 that supports the traveling freely.

The feed mechanism 9 includes the traveling table 10
Linear guide 11 that locks and this linear guide 11
A ball screw 12 mechanically connected to the ball screw, a coupling 12a connected to the ball screw, and a servomotor 13 that rotationally drives the coupling.

The servomotor 13 is electrically connected to the control section 7 and is controlled based on the feed speed signal and the feed direction support signal from the control section. The traveling table 10 is provided with a cutter mechanism 14. It should be noted that the cutter mechanism 14 includes a receiving portion 15 that slidably contacts the lower surface of the sheet 1 to support the same, a cutter 16 that is disposed to face the receiving portion with the sheet interposed therebetween, and drives the cutter up and down. And a cylinder 17 which is a drive source for moving the sheet in a direction orthogonal to the sheet feeding direction.

The cylinder 17 is electrically connected to the control section 7 and drives the cutter 17 up and down based on an instruction signal from the control section. A first position sensor 18 for detecting the tab 2 of the sheet 1 is arranged at a predetermined position on the main conveyance path 8, while a second position sensor 18 is provided on the traveling table 10 near the cutter mechanism 14. A position sensor 19 is provided and also detects the tab 2 being conveyed.

The first position sensor 18 is arranged at a distance l on the upstream side of sheet conveyance from the origin position of the traveling table 10 described later. The first and second position sensors 18 and 19 are electrically connected to each other to the control unit 7, and when the passage of the tab 2 is detected, the detection signals are output to the control unit 7. It has become.

In the cutting device thus configured, the transport mechanism 4 feeds the sheet 1 from the delivery section 3 and transports it along a predetermined transport path. When the tabs 2 provided at a predetermined interval on the sheet 1 pass directly above the first position sensor 18, this sensor detects the tab and outputs the detection signal to the control unit 7.

The first position sensor 18 is the traveling table 10
Is separated from the origin position (indicated by a chain double-dashed line in the figure) by a predetermined distance l. The control unit 7 uses the first position sensor 1
Upon receiving the detection signal of 8, the reset signal is immediately sent to the encoder 6. Since the sheet 1 is continuously conveyed by the conveying mechanism 4, the measurement value of the encoder 6 increases.

When the output of the encoder 6 reaches a predetermined value, the control section 7 sends a drive signal to the feed mechanism 9 to start driving. That is, the traveling table 10 starts traveling in the same direction as the sheet 1 conveyance direction from the origin position.

The traveling speed of the traveling table 10 is gradually increased to approach the conveying speed of the sheet 1. When the value obtained from the output from the encoder 6 reaches a predetermined value (at this time, the tab 2 approaches the second position sensor 19), the relative feed speed of the sheet 1 and the feed speed of the traveling table 10 is determined. The feed mechanism 9 is controlled so that the speed becomes zero.

The second position sensor 19 detects the position of the tab 2 while facing the tab 2 almost accurately.
That is, the traveling table 10 is driven to travel almost in synchronization with the conveyance of the sheet 1.

When the transport speed of the sheet 1 by the transport mechanism 4 is changed, the output value of the encoder 6 and the detection signal of the second position sensor 19 are changed, so that the control section 7 performs the correction calculation. The correction speed is instructed to the feed mechanism 9.

Therefore, the relative speed between the conveying speed of the sheet 1 and the feed speed of the traveling table 10 is controlled to be zero at all times, and the sheet 1 and the traveling table 10 are actually traveling, but are as if they were mutually stopped. Is made.

Here, from the control unit 7 to the cutter mechanism 14
The drive signal is output to the cutter 16, the cutter 16 descends, and the sheet 1
Disconnect. After all, since the cutting is performed while moving the cutter 16 at the same speed as the sheet 1, it is not necessary to stop the sheet at the time of cutting, and the required working time can be shortened.

Since the relative speed between the sheet 1 and the cutter 16 is zero, the cutter does not block the sheet conveying path during the cutting action, and the sheet does not bend. Therefore, the cut sheet and the newly cut sheet can be transferred to the next working process without any trouble.

Further, when the conveying speed of the sheet 1 is changed, if the feeding speed of the cutter 16 is changed, that is, if the feeding mechanism 9 is controlled, the sheet can be cut accurately while continuing the traveling.

Since the position of the tab 2 is detected by the first and second position sensors 18 and 19 and the relative speed between the sheet 1 and the cutter 16 is controlled to be zero, the sheet conveying speed is not constant. Even in such a case (for example, in the working time zone), if the speed changes to some extent, it can be sufficiently followed, and the positional deviation of the cutting position does not occur at all.

In the above embodiment, the cutter mechanism 14
In the above description, the receiving portion 15 that supports the seat 1 and the cutter 16 that is opposed to the receiving portion via the seat and is supported so as to be movable up and down are provided, but the present invention is not limited to this, and will be described below. Any cutter mechanism may be adopted.

That is, as shown in FIG. 2A, the cutter 16A is of a so-called guillotine type, and is dropped by its own weight to cut the sheet 1 on the receiving portion 15A. After cutting, the cutter 16A is locked by lifting it to a predetermined position by a lifting mechanism (not shown), and when the cutting instruction signal is received, the lock is released and the cutter is dropped.

As shown in FIG. 6B, the cutter 16B is of a so-called push-cut type. It should be noted that one end of the cutter 16B is provided with the receiving portion 15B via the pivot pin 20.
Is rotatably supported, and an actuating mechanism (not shown) is connected to the free end which is the other end. Therefore, if the actuating mechanism receives the actuating signal, the cutter 16B is rotationally driven, and the receiving portion 1
The sheet 1 on the sheet 5B is cut in the push-cut state.

As shown in FIG. 6C, the rotary blade 16C
It may be a so-called rotary cutter structure in which the fixed blade 16D and the fixed blade 16D make a pair. In this case, a plurality of rotary blades 16C are usually provided on the surface of the cylindrical body. Above fixed blade 16D
Is connected to a spring mechanism (not shown) and is brought into a pressure contact state at the same timing as the rotation of the rotary blade 16C.
And the sheet 1 is cut.

Further, in the above embodiment, the feeding mechanism 9
Although the ball screw 12 is provided to drive the traveling table 10 as a component of the above, the present invention is not limited to this, and for example, the feeding mechanism 9 as shown in FIG.
It may be A.

That is, the traveling table 10A provided with the cutter mechanism 14 is movably supported by the linear guide 11A constituting the feeding mechanism 9A. The traveling table 10A is provided with a belt fixing portion 21 in which the belt 12A penetrates and is integrated by a fixing tool. Belt 12A
Is locked to a pulley (not shown) as a drive source, a conveyor pulley, etc., and these constitute a feed mechanism 9A.

In this case as well, it is needless to say that the relative speed between the conveyance speed of the sheet 1 and the feed speed of the cutter is controlled to zero based on a control signal from a control unit (not shown).

Further, although the tab 2 is provided on the sheet 1 as the position detecting mark, the present invention is not limited to this, and it is merely a mark on the sheet or a hole formed on the sheet. Good.

Further, in the above-mentioned embodiment, the flexible sheets are applied as the sheets to be cut, but the present invention is not limited to this, and thin metal, paper, glass, film. Or a sheet or tape or the like.
Furthermore, various configurations can be adopted without departing from the scope of the present invention, and similar effects can be obtained.

[0048]

As described above, according to the present invention, since the sheet is cut while being conveyed and run without stopping the sheet, the manufacturing time can be greatly shortened and the productivity can be improved.

Since the relative speed between the sheet and the cutter mechanism is set to zero before the sheet is cut, there is no phenomenon of blocking the sheet conveying path by the cutter mechanism, and therefore, the occurrence of bending of the sheet is prevented. The effect of facilitating the transition to the next process and improving work reliability can be achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a sheet cutting device according to an embodiment of the present invention.

FIG. 2A is a configuration diagram of a cutter mechanism according to another embodiment of the present invention. (B) is a block diagram of a cutter mechanism of still another embodiment. (C) is a block diagram of a cutter mechanism of still another embodiment.

FIG. 3 is a configuration diagram of a feeding mechanism according to another embodiment of the present invention.

FIG. 4 is a configuration diagram of a sheet cutting device showing a conventional example of the present invention.

FIG. 5 is a configuration diagram of a sheet cutting device showing still another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheets (sheets), 4 ... Conveying mechanism, 10 ... Traveling table, 14 ... Cutter mechanism, 9 ... Feeding mechanism, 7 ... Control part, 11 ... Linear guide, 12 ... Ball screw, 13 ... Servo motor, 12A ... Belt, 15 ... Receiving part, 16 ... Cutter, 2 ... Position detection mark (tab), 6 ... Encoder, 18 ... First position sensor, 19 ... Second position sensor.

Claims (7)

[Claims] 1. A transport mechanism for feeding out sheets to transport and drive them in a predetermined direction, a traveling table movably supported at a position facing the sheets transported by the transport mechanism, and the traveling table. A cutter mechanism provided on the table for cutting the sheet, a feeding mechanism for driving the traveling table to travel together with the sheets, a conveyance mechanism for the sheets, and monitoring the traveling speed of the traveling table and the conveying speed of the sheets. A sheet cutting apparatus, comprising: a control unit that controls the feeding mechanism so that the relative speed becomes zero, and controls the operation of the cutter mechanism at a timing when the relative speed becomes zero. 2. The feed mechanism includes a linear guide that supports the traveling table, a ball screw connected to the traveling table, and a servomotor that rotationally drives the ball screw. 1. The sheet cutting device according to 1. 3. The feeding mechanism comprises a linear guide that supports the traveling table, a belt connected to the traveling table, and a drive source that drives the belt to travel. Sheet cutting device. 4. The cutter mechanism is provided with a receiving portion for supporting the conveyed sheets, and is provided via the receiving portion and the sheets, and is movable in a direction orthogonal to a sheet feeding direction. A cutter is provided.
The sheet cutting device described. 5. The cutter is for moving sheets in a vertical direction with respect to the sheets to cut the sheets, one end of which is rotatably supported and the other end of which is a free end. Characterized in that at least one of the one which cuts the sheets by the rotary blade and the fixed blade which is pressed against the rotary blade and cuts the sheets in synchronization with the rotation of the rotary blade. The sheet cutting device according to claim 4. 6. The sheet is provided with a mark for position detection, and the control unit is provided with a detection signal from a position sensor for detecting the mark for position detection and an encoder for measuring the feed amount of the sheet. The sheet cutting apparatus according to claim 1, wherein the feeding mechanism is controlled based on a detection signal. 7. The position detecting marks provided on the sheets and the like are tabs protruding from the edge of the sheet, and the position sensor is arranged at a position separated from the origin position of the traveling table by a predetermined distance. A first position sensor that resets the encoder based on a signal that detects passage of the tab, and a position sensor that is provided on the traveling table and detects the position of the tab along with traveling of the traveling table, and based on the signal. 7. A sheet cutting device according to claim 6, further comprising a second position sensor that corrects the feed rate.