CN116194232A

CN116194232A - Processing line system

Info

Publication number: CN116194232A
Application number: CN202180065446.0A
Authority: CN
Inventors: 堀升悟; 柴山健
Original assignee: Sankyo Manufacturing Co Ltd
Current assignee: Sankyo Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2021-09-24
Publication date: 2023-05-30
Also published as: TW202220921A; JPWO2022071132A1; KR20230075441A; WO2022071132A1; EP4201542A1

Abstract

Provided is a processing line system provided with a plate material supply device capable of supplying plate materials so as to improve production efficiency. The processing line system (101) comprises: a processing device (102) for processing the plate (106); a sheet material conveying device (103) for intermittently conveying a sheet material (106) to the processing device (102); and a sheet material supply device (104) for supplying the sheet material (106) from the uncoiler (105) to the sheet material conveying device (103), wherein the sheet material supply device (104) can change the speed of supplying the sheet material (106) to the sheet material conveying device (103) according to the process of the sheet material (106) by the processing device (102).

Description

Processing line system

Technical Field

The present invention relates to a processing line system having a sheet material supply device capable of supplying a sheet material to a sheet material conveying device that intermittently conveys the sheet material to a processing device to improve production efficiency.

Background

When the sheet material conveying device conveys a sheet material such as a coil stock to a processing device such as a press device, the sheet material conveying device intermittently conveys the sheet material so as to repeat the traveling and stopping of the sheet material in accordance with the processing in the processing device. The inertial force generated by the travel and stop of the plate material acts on the plate material, and the plate material vibrates or fluctuates, which is called "shake". When such vibration occurs, not only is an excessive load applied to the sheet material conveying apparatus, but also bending or scratches are generated in the sheet material, and therefore, a buffer region called a collar needs to be provided. As a method for reducing the vibration of the plate material, there is a plate material supply device provided with a U-shaped, S-shaped or other collar as a buffer section. Although the jitter is smaller than in the case where no loop such as U-shaped or S-shaped is provided, the jitter is generated when the sheet material is conveyed at a high speed, and the sheet material cannot be conveyed at a further high speed, and there is a problem that the processing capability cannot be fully exhibited during the period when the processing is required to be performed at a high speed.

Patent document 1 discloses a coil stock supply device which is disposed in the vicinity of a sheet material conveying device of a press device, and includes: a pair of conveying rollers having a servo motor for conveying the coil while bending the coil along the coil; the position sensor is used for detecting the annular bending amount of the coil stock; and a control device for controlling the servo motor according to the signal from the position sensor, thereby controlling the conveying amount of the coil stock conveyed by the conveying roller. Patent document 2 discloses a coil stock supply device for supplying a coil stock to a sheet material conveying device of a press device, comprising: a coil stock supply unit; a position sensor for detecting the amount of loop of the coil stock provided on the downstream side of the coil stock supply unit; a control device for controlling the servo motor according to the signal from the position sensor, thereby controlling the conveying amount of the coil stock conveyed by the conveying roller; and a holder that holds the coil stock supply unit in a state in which the mounting angle of the coil stock supply unit can be adjusted so that the supply angle of the material can be changed in accordance with the conditions. Patent document 3 discloses a coil stock supply device including a sensor provided at a portion where a loop is formed, the sensor controlling the bulge of the loop to be optimal, the coil stock supply device including: a straightening unit for straightening and feeding out the coil stock; an outlet guide portion provided at an outlet of the straightening portion at a portion where a loop of the coil stock is formed; and an upper guide part arranged at the annular bending part for forming the coil stock, one part is arranged at the outlet of the straightening part, and the other part is arranged at the horizontal moving part of the annular bending part.

Prior art literature

Patent literature

Patent document 1: japanese unexamined patent publication No. 6-5716

Patent document 2: japanese patent application laid-open No. 2004-142876

Patent document 3: japanese patent laid-open No. 2011-104650

Disclosure of Invention

Technical problem to be solved by the invention

In a processing line system including a processing device such as a press device, the following problems exist even when a coil stock supply device based on patent documents 1 to 3 is used as a sheet material supply device that supplies a sheet material to a sheet material conveying device: when the plate conveying device intermittently conveys the plate to the processing device at a high speed, the plate is vibrated by the inertia force generated by the advancing and stopping of the plate, so that the shake is easy to occur, and the production efficiency of the processing line system cannot be improved.

Accordingly, an object of the present invention is to provide a processing line system having a board feeding device for solving the above-described problems, the board feeding device being capable of reducing the influence of an inertial force generated by the running and stopping of a board by a board conveying device, and further, supplying the board to the board conveying device while suppressing the occurrence of chatter, so as to improve the production efficiency.

Means for solving the problems

According to one aspect of the invention, a processing line system includes: a processing device for processing the plate; a sheet material conveying device that intermittently conveys a sheet material to the processing device; and a sheet material supply device that supplies the sheet material from the uncoiler to the sheet material conveying device, wherein the sheet material supply device is capable of changing the speed at which the sheet material is supplied to the sheet material conveying device in accordance with the process of the sheet material by the processing device.

According to a specific example of the present invention, in the machining line system, the process of the machining device includes a process of moving the plate material and a process of machining the plate material, and the plate material feeding device in the moving process feeds the plate material at a faster speed than the plate material feeding device in the process of machining.

According to a specific example of the present invention, in the processing line system, the sheet material supply device may change the speed of supplying the sheet material to the sheet material conveying device according to the speed at which the sheet material conveying device conveys the sheet material to the processing device.

According to a specific example of the present invention, in the processing line system, the sheet material supply device is capable of increasing the speed of supplying the sheet material to the sheet material conveying device when the conveyance of the sheet material by the sheet material conveying device starts, and reducing the speed of supplying the sheet material to the sheet material conveying device when the conveyance of the sheet material by the sheet material conveying device stops.

According to a specific example of the present invention, in the processing line system, the sheet material feeding device may change the speed at which the sheet material is fed to the sheet material conveying device so that the amount of the sheet material fed from the sheet material feeding device to the sheet material conveying device during 1 cycle of the process of the processing device is substantially the same as the amount of the sheet material transferred from the sheet material conveying device to the processing device.

According to a specific example of the present invention, in the processing line system, the sheet material supply device always supplies the sheet material to the sheet material conveying device.

According to a specific example of the present invention, in the processing line system, the sheet material feeding device feeds the sheet material to the sheet material conveying device when the sheet material conveying device does not convey the sheet material to the processing device.

According to a specific example of the present invention, in the processing line system, the speed at which the sheet material is supplied from the sheet material supply device to the sheet material conveying device is different from the speed at which the sheet material conveying device conveys the sheet material to the processing device.

According to a specific example of the present invention, in the processing line system, the processing device is provided with a sensor for detecting a process of the processing device, and the sheet conveying device is capable of intermittently conveying the sheet to the processing device based on an output signal from the sensor.

According to a specific example of the present invention, in the processing line system, the sheet material supply device can change the speed of supplying the sheet material to the sheet material conveying device based on the output signal from the sensor.

Effects of the invention

According to the invention, the processing line system can process the plate at high speed, and the production efficiency can be improved.

Other objects, features and advantages of the present invention will be apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of a processing line system according to an embodiment of the present invention.

Fig. 2A is a diagram showing an example of the operational relationship of the processing device, the sheet material conveying device, and the sheet material supply device in the processing line system of fig. 1.

Fig. 2B is a diagram showing another example of the operational relationship of the processing device, the sheet material conveying device, and the sheet material supply device in the processing line system of fig. 1.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments.

A processing line system 101 as an embodiment of the present invention is described with reference to fig. 1. As shown in fig. 1, the processing line system 101 includes: a processing device 102 such as a press device for performing a processing such as press processing on a sheet 106 such as a coil; a sheet conveying device (feeder) 103 that intermittently conveys the sheet 106 to the processing device 102; and a board feeding device (stock controller) 104 for feeding the board 106 from the unwinder 105 to the board conveying device 103. The processing line system 101 further includes a control device 107 for controlling the processing device 102, the sheet material conveying device 103, and the sheet material supply device 104. The sheet material conveying apparatus 103 may include a pair of rollers, a motor that drives at least one of the pair of rollers to rotate, and a control device that controls the motor, and the control device of the sheet material conveying apparatus 103 may control intermittent conveyance of the sheet material 106 to the processing apparatus 102 by causing the pair of rollers to grip the sheet material 106 or causing the pair of rollers to separate and release the sheet material 106. However, the sheet conveying device 103 is not limited thereto. The sheet material supply device 104 is a device for leveling and straightening the sheet material 106 taken out from the uncoiler 105, and may include: two or more rollers for gripping and conveying the sheet 106; a motor for driving at least one of the two or more rollers to rotate; and a control device for controlling the motor to control the amount of the sheet 106 supplied to the sheet conveying device 103 by two or more rollers, which can be coupled by a coupling device such as a timing belt or a gear. However, the board feeding device 104 is not limited thereto. The control device of the sheet material feeding device 103 and the control device of the sheet material feeding device 104 may be incorporated in the control device 107.

A space 108 capable of retaining the sheet 106 by intermittent conveyance of the sheet conveying device 103 to the processing device 102 is provided between the sheet feeding device 104 and the sheet conveying device 103. The space 108 becomes an empty space for the sheet 106. When the sheet material feeding device 104 feeds the sheet material 106 to the sheet material conveying device 103, the sheet material 106 is conveyed so as to form a loop as shown in fig. 1 in the space 108. The conveying operation of the sheet 106 by the sheet conveying device 103 is intermittently performed so that the sheet 106 is repeatedly moved and stopped in accordance with the processing in the processing device 102. When the sheet material conveying device 103 stops conveying the sheet material 106 to the processing device 102 and the sheet material feeding device 104 continues to feed the sheet material 106 to the sheet material conveying device 103, the sheet material 106 stays in the space 108, and the loop formed by the sheet material 106 gradually moves to the left in the space 108 shown in fig. 1 in accordance with the stop time of the conveyance of the sheet material by the sheet material conveying device 103. When the sheet conveying device 103 starts conveying the sheet 106 to the processing device 102 again, the loop formed by the sheet 106 gradually moves toward the right in the space 108 shown in fig. 1. By providing the space 108 in this way, the amount of the sheet material conveyed to the processing device 102 by the sheet material conveying device 103 can be adjusted, but in the loop bending without a guide for guiding the sheet material 106, the sheet material 106 is vibrated by the inertial force generated by the traveling and stopping of the sheet material 106 by the sheet material conveying device 103, and the vibration is more likely to occur.

The sheet material supply device 104 can change the speed of supplying the sheet material 106 to the sheet material conveying device 103 according to the process of the processing device 102 for the sheet material 106. The process of the processing device 102 includes: a step of moving the sheet 106 according to the target length by the sheet conveying device 103; and a step of processing the moved sheet 106. The sheet material supply device 104 can change the speed of supplying the sheet material 106 to the sheet material conveying device 103 when switching from the step of moving the sheet material 106 to the step of processing the sheet material 106, and when switching from the step of processing the sheet material 106 to the step of moving the sheet material 106. For example, when the processing device 102 is a pressure device, the pressure device may have: after the step of moving the plate 106, the control device of the press machine can control the motor to rotate the crankshaft 109 provided with the eccentric cam or the like, thereby moving the upper die 111 engaged with the eccentric cam or the like to the upper side and the lower side in the vertical direction, and press the moved plate 106 by cooperation of the upper die 111 and the lower die 112. After the step of pressing the sheet 106, the sheet 106 may be moved again by the sheet conveying device 103 according to the target length. However, the processing device 102 is not limited thereto. The control device of the processing device 102 may be built in the control device 107. The control device of the sheet material supply device 104 can change the rotation speed of the output shaft of the motor when switching from the step of moving the sheet material 106 to the step of press working the sheet material 106 and from the step of press working the sheet material 106 to the step of moving the sheet material 106, and can change the rotation speeds of two or more rollers holding the sheet material 106 and the speed of supplying the sheet material 106 to the sheet material conveying device 103 in accordance with the change in the rotation speed of the output shaft of the motor.

The sheet material supply device 104 can supply the sheet material 106 to the sheet material conveying device 103 at a higher speed in the step of moving the sheet material 106 than the sheet material 106 is supplied to the sheet material conveying device 103 in the step of performing the processing of the sheet material 106. Fig. 2A shows an example of the operational relationship among the processing device 102, the sheet material conveying device 103, and the sheet material supply device 104 in 1 cycle of the process of the processing device 102. In particular, when the processing device 102 is a pressure device, an example of the operational relationship when the die a is used as an example of the upper die 111 and the lower die 112 is shown. The angle (°) shown in fig. 2A indicates the rotation angle of the crankshaft 109, and the period from 270 ° to 90 ° by 0 ° rotation of the crankshaft 109 indicates the step of moving the sheet 106 according to the target length by the sheet conveying device 103. A period of rotation of the crankshaft 109 from 90 ° to 270 ° through 180 ° indicates a state in which the sheet conveying device 103 stops conveying the sheet 106 to the processing device 102, and a period of rotation of the crankshaft 109 around 180 ° indicates a process of processing the moved sheet 106. In addition, the sheet material feeding device 104 feeds the sheet material 106 to the sheet material conveying device 103 at a fixed first speed in the case of a process in which the sheet material 106 is moved by the sheet material conveying device 103, which is a period in which the crankshaft 109 starts to rotate from 270 ° through 0 ° to 90 °. Further, the plate material feeding device 104 feeds the plate material 106 to the plate material conveying device 103 at a fixed second speed in a period from 90 ° to 270 ° through 180 °, that is, in a case including a process of processing the plate material 106. The first speed corresponds to the speed of the process of moving the sheet 106 by the sheet conveying device 103, and is thus faster than the second speed.

Fig. 2B shows another example of the operational relationship among the processing device 102, the sheet material conveying device 103, and the sheet material supply device 104 in 1 cycle of the process of the processing device 102. In particular, when the processing device 102 is a pressure device, another example of the operation relationship is shown when a different mold B from the mold a is used as another example of the upper mold 111 and the lower mold 112. The angle (°) shown in fig. 2B indicates the rotation angle of the crankshaft 109, and the period from 240 ° to 120 ° by 0 ° rotation of the crankshaft 109 indicates the step of moving the sheet 106 according to the target length by the sheet conveying device 103. A period from 120 ° to 240 ° by 180 ° rotation of the crankshaft 109 indicates a state in which the sheet material conveying device 103 stops conveying the sheet material 106 to the processing device 102, and a period in which the crankshaft 109 rotates around 180 ° indicates a process of processing the moved sheet material 106. Comparing fig. 2A and 2B, the rotation angle of the crankshaft 109 during the process of moving the sheet 106 by the sheet conveying device 103 is 180 ° in fig. 2A, and 240 ° in fig. 2B. If the conveying amount of the sheet 106 of the sheet conveying device 103 per unit time is the same, the sheet conveying device 103 can convey a larger amount of the sheet 106 in the case of fig. 2B as compared with fig. 2A. In addition, if the rotation angle of the crankshaft 109 during the process of moving the sheet 106 by the sheet conveying device 103 is set to 120 °, the sheet conveying device 103 can convey a smaller amount of the sheet 106 than in fig. 2A. In this way, the amount of the sheet 106 transferred to the processing device 102 by the sheet conveying device 103 can be adjusted according to the rotation angle of the crankshaft 109 so as to match the die used in the pressing device.

The crankshaft 109 may be rotated either rapidly or slowly depending on the rotation angle. For example, in fig. 2A, the rapid rotation of the crankshaft 109 through a period of 0 ° to 90 ° from 270 ° can shorten the time to convey the sheet material 106 to the processing apparatus 102, reducing the amount of conveyance of the sheet material 106 to the processing apparatus 102. In addition, the slow rotation of the crankshaft 109 from 270 ° to 90 ° through 0 ° can lengthen the time for which the sheet material 106 is conveyed to the processing device 102, and increase the conveying amount of the sheet material 106 to the processing device 102.

The sheet material feeding device 104 can change the speed of feeding the sheet material 106 to the sheet material conveying device 103 according to the speed at which the sheet material 106 is conveyed to the processing device 102 by the sheet material conveying device 103. Since the sheet material 106 conveying operation by the sheet material conveying device 103 is intermittently performed so that the sheet material 106 is repeatedly moved and stopped in accordance with the processing in the processing device 102, if the sheet material conveying device 103 stops conveying the sheet material 106 to the processing device 102, the sheet material feeding device 104 continues to feed the sheet material at the same speed as the sheet material conveying device 103 conveys the sheet material 106 to the processing device 102, and there is a case where the inertial force generated by the movement and stop of the sheet material 106 by the sheet material conveying device 103 shakes. Accordingly, the sheet material feeding device 104 can change the speed of feeding the sheet material 106 to the sheet material conveying device 103 in synchronization with the speed of conveying the sheet material 106 to the processing device 102 by the sheet material conveying device 103. As shown in fig. 2A and 2B, when the sheet material conveying device 103 stops conveying the sheet material 106 to the processing device 102, the speed at which the sheet material feeding device 104 feeds the sheet material 106 to the sheet material conveying device 103 can be reduced as compared with the case where the sheet material conveying device 103 conveys the sheet material 106 to the processing device 102, thereby reducing the feeding amount of the sheet material 106 from the sheet material feeding device 104 to the sheet material conveying device 103. This can adjust the amount of the plate material 106 retained in the space 108, thereby suppressing the occurrence of the chatter vibration.

As shown in fig. 2A and 2B, when the sheet material conveying device 103 stops conveying the sheet material 106 to the processing device 102, the sheet material feeding device 104 may change the speed so as to slow down the speed of feeding the sheet material 106 to the sheet material conveying device 103. When the sheet material conveying device 103 resumes the conveyance of the sheet material 106 to the processing device 102, the sheet material feeding device 104 may change the speed so as to increase the speed of feeding the sheet material 106 to the sheet material conveying device 103. In addition, during 1 cycle of the process of the processing device 102, the sheet material feeding device 104 may change the speed at which the sheet material 106 is fed to the sheet material conveying device 103 so that the feeding amount of the sheet material 106 from the sheet material feeding device 104 to the sheet material conveying device 103 is substantially the same as the conveying amount of the sheet material 106 from the sheet material conveying device 103 to the processing device 102. This can adjust the amount of the plate material 106 retained in the space 108, thereby further suppressing the occurrence of the chatter vibration.

Although the sheet material feeding device 104 can feed the sheet material 106 to the sheet material conveying device 103 at an arbitrary speed, when the sheet material feeding device 104 is operated to intermittently feed the sheet material 106 to the sheet material conveying device 103 in the same manner as the sheet material conveying device 103, a shake may occur between the sheet material feeding device 104 and the unwinder 105. In order to suppress the occurrence of such chatter, the sheet material feeding device 104 can always feed the sheet material 106 to the sheet material conveying device 103, and even when the sheet material conveying device 103 does not convey the sheet material 106 to the processing device 102, the sheet material feeding device 104 can feed the sheet material 106 to the sheet material conveying device 103.

As shown in fig. 2A and 2B, the speed at which the sheet material 106 is supplied from the sheet material supply device 104 to the sheet material conveying device 103 is not necessarily the same as the speed at which the sheet material 106 is conveyed from the sheet material conveying device 103 to the processing device 102, and may be different regardless of the process of the processing device 102. The feeding speed of the sheet material 106 by the sheet material feeding device 104 and the conveying speed of the sheet material 106 by the sheet material conveying device 103 may be set according to the conditions such as the material, thickness, and conveying length of the sheet material 106, so that occurrence of chatter can be suppressed.

The processing device 102 may also include a sensor for detecting the process of the processing device 102. For example, when the processing device 102 is a pressure device, as a sensor, an encoder or the like detector 110 that detects the rotation angle of the crankshaft 109 may be provided. The rotation angle of the crankshaft 109 shown in fig. 2A and 2B is detected by an angle detector 110. The output signal of the rotation angle detected by the angle detector 110 is transmitted to the control device 107. Thereby, the control device 107 can recognize the process of the processing device 102. For example, as shown in fig. 2A, when the rotation angle of the crankshaft 109 is between 0 ° and 90 ° from 270 °, the control device 107 can recognize that the sheet material 106 is moved by the sheet material conveying device 103 according to the target length. When the rotation angle of the crankshaft 109 is around 180 °, the control device 107 can recognize that the process of processing the moving plate 106 is performed. When the control device 107 recognizes that the rotation angle of the crankshaft 109 is 90 °, the sheet conveying device 103 is caused to stop the conveyance of the sheet 106 to the processing device 102. When the control device 107 recognizes that the rotation angle of the crankshaft 109 is 270 °, the sheet material conveying device 103 is caused to restart the conveyance of the sheet material 106 to the processing device 102, and the sheet material 106 is conveyed to the processing device 102 at a constant speed. In this way, the control device 107 can intermittently transfer the sheet 106 to the processing device 102 by the sheet conveying device 103 based on the output signal from the angle detector 110.

In the case where the control device 107 recognizes that the rotation angle of the crankshaft 109 is between 0 ° and 90 ° through 270 °, that is, in the process of moving the sheet 106 according to the target length by the sheet conveying device 103, the sheet feeding device 104 can be caused to feed the sheet 106 to the sheet conveying device 103 at the first speed. When the control device 107 recognizes that the rotation angle of the crankshaft 109 is between 180 ° and 270 ° from 90 °, that is, when the process of processing the sheet material 106 is included, the sheet material feeding device 104 is caused to feed the sheet material 106 to the sheet material conveying device 103 at the second speed. When the control device 107 recognizes that the rotation angle of the crankshaft 109 is 90 °, the speed at which the sheet material feeding device 104 feeds the sheet material 106 to the sheet material conveying device 103 is changed from the first speed to the second speed. When the control device 107 recognizes that the rotation angle of the crankshaft 109 is 270 °, the speed at which the sheet material feeding device 104 feeds the sheet material 106 to the sheet material conveying device 103 is changed from the second speed to the first speed. In this way, the control device 107 can change the speed at which the sheet material 106 is supplied to the sheet material conveying device 103 by the sheet material supply device 104 based on the output signal from the angle detector 110.

The processing line system 101 may further include: a lower limit sensor 113 for detecting a lower limit of the loop of the plate 106 formed in the space 108; an underside sensor 114 that detects the underside of the loop of sheet material 106; an upper sensor 115 for detecting the upper side of the loop of the sheet 106; and an upper limit sensor 116 that detects an upper limit of the loop of the sheet 106. The control device 107 can recognize the state of the loop of the sheet material 106 based on the output signals from the sensors 113 to 116, and can stop the state of the processing device 102, the sheet material conveying device 103, and the sheet material feeding device 104 from changing the state of the operation based on the state of the loop of the sheet material 106, thereby suppressing the occurrence of chatter.

By using the processing line system 101 of the present invention as described above, the sheet material supply device 104 can alleviate the influence of the inertial force generated by the traveling and stopping of the sheet material 106 by the sheet material conveying device 103, suppress the occurrence of chatter in the sheet material conveying device 103 that intermittently conveys the sheet material 106 to the processing device 102 such as a press device, suppress the vibration of the sheet material 106, and also can supply the sheet material 106 at a high speed in response to the processing such as press processing. The processing device 102 such as a press machine performs processing such as press working on the sheet 106 intermittently conveyed with high accuracy from the sheet conveying device 103, and can manufacture structures such as small components used in information-related devices such as cellular phones and personal computers, structural components such as motor components for automobiles and industries, and home appliances.

The above description is directed to specific embodiments, but the present invention is not limited thereto, and various changes and modifications can be made within the scope of the principles of the present invention and the appended claims, which will be apparent to those skilled in the art.

Description of the reference numerals

101. Processing line system

102. Processing device

103. Plate conveying device

104. Plate material supply device

105. Uncoiling machine

106. Plate material

107. Control device

108. Space of

109. Crankshaft

110. Angle detector

111. Upper side mould

112. Lower side die

113. Lower limit sensor

114. Underside sensor

115. Upper sensor

116. Upper limit sensor

Claims

1. A process line system, comprising:

a processing device for processing the plate;

a sheet material conveying device that intermittently conveys the sheet material to the processing device; and

a board feeding device for feeding the board from the uncoiler to the board conveying device,

the sheet material supply device may change a speed of supplying the sheet material to the sheet material conveying device according to a process of the sheet material by the processing device.

2. The process line system according to claim 1, wherein,

the process includes a step of moving the plate material and a step of processing the plate material, wherein the plate material feeding device in the moving step feeds the plate material at a speed faster than the plate material feeding device in the processing step feeds the plate material.

3. The processing line system according to claim 1 or 2, wherein,

the sheet material supply device may change a speed of supplying the sheet material to the sheet material conveying device according to a speed of conveying the sheet material to the processing device by the sheet material conveying device.

4. A process line system according to any one of claim 1 to 3, wherein,

the sheet material feeding device is capable of increasing the speed of feeding the sheet material to the sheet material conveying device when the sheet material conveying device starts conveying the sheet material, and reducing the speed of feeding the sheet material to the sheet material conveying device when the sheet material conveying device stops conveying the sheet material.

5. The processing line system according to any one of claims 1 to 4, wherein,

the sheet material feeding device may change a speed at which the sheet material is fed to the sheet material conveying device so that an amount of the sheet material fed from the sheet material feeding device to the sheet material conveying device during 1 cycle of the process is substantially the same as an amount of the sheet material transferred from the sheet material conveying device to the processing device.

6. The processing line system according to any one of claims 1 to 5, wherein,

the sheet material supply device always supplies the sheet material to the sheet material conveying device.

7. The processing line system according to any one of claims 1 to 6, wherein,

the sheet material supply device supplies the sheet material to the sheet material conveying device when the sheet material conveying device does not convey the sheet material to the processing device.

8. The processing line system according to any one of claims 1 to 7, wherein,

the speed at which the sheet material is supplied from the sheet material supply device to the sheet material conveying device is different from the speed at which the sheet material is conveyed from the sheet material conveying device to the processing device.

9. The processing line system according to any one of claims 1 to 8, wherein,

the processing device is provided with a sensor for detecting the process, and the sheet conveying device can intermittently convey the sheet to the processing device according to an output signal from the sensor.

10. The process line system according to claim 9, wherein,

the sheet material feeding device may change a speed of feeding the sheet material to the sheet material conveying device based on an output signal from the sensor.