JP6945813B2 - Paper processing equipment - Google Patents

Description

The present invention relates to a paper processing apparatus.

Patent Document 1 below discloses a paper processing apparatus provided with a pressing roller that presses the paper on which an adhesive is applied to the overlapping surfaces of the paper with a pressure equal to or higher than a predetermined value and adheres the paper. The pressing roller of this device is adjacent to the pressing portion that presses the overlapping surface of the paper with a pressure equal to or higher than a predetermined value, and is a non-pressing portion that does not press a part of the peripheral edge of the overlapping surface of the paper with a pressure equal to or higher than a predetermined value. Is provided. As a result, a non-adhesive portion can be formed on the paper that has passed through the pressing roller.

Japanese Unexamined Patent Publication No. 2016-147677

In Patent Document 1, when the paper is conveyed while being pressed by the pressing roller, the overlapping surfaces of the paper are pressed with a pressure equal to or higher than a predetermined value that can be adhered. Therefore, a large load is applied to the rotation of the pressing roller. If the thickness of the paper is slightly thicker than other papers, it may be difficult to transport the paper and the transport speed may decrease. In addition, when the paper is left for a long time and the adhesive applied to the overlapping surfaces deteriorates, it becomes difficult to transport the paper by the pressing roller when it must be pressed with a large pressure by the pressing roller. The transport speed may decrease. If the transport speed of the preceding paper is reduced, the distance between the preceding paper and the following paper is shortened, and jam occurs.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a paper processing apparatus capable of maintaining the space between the front and back papers and suppressing the occurrence of jam.

In order to achieve the above object, the paper processing apparatus according to the present invention presses the paper on which the adhesive is applied to the overlapping surfaces of the paper with a pressure equal to or higher than a predetermined value, and a pressing roller for adhering the paper and the pressing. Based on the supply unit that supplies the paper to the rollers, the paper thickness detection unit that detects the thickness of the paper, and the thickness of the paper that is detected by the paper thickness detection unit, the paper is pressed by the supply unit to the roller. It is equipped with a control unit that controls the supply speed.

Further, in the above configuration, the control unit controls the paper supply speed to the pressing roller by the supply unit so as not to exceed a predetermined upper limit value based on the paper thickness detected by the paper thickness detection unit.

Then, the paper processing apparatus according to the present invention presses the paper on which the adhesive is applied to the overlapping surfaces of the paper with a pressure equal to or higher than a predetermined value, and supplies the paper to the pressing roller and the pressing roller. Controls the paper supply speed to the pressing rollers by the feeding unit based on the detection results of the pressing roller distance detecting unit that detects the distance between the feeding unit and the pair of pressing rollers and the pressing roller distance detecting unit. It is equipped with a control unit.

Further, in the above configuration, the control unit does not exceed a predetermined upper limit value for the speed at which the paper is supplied to the pressing rollers by the supplying unit based on the distance between the pressing rollers detected by the pressing roller distance detecting unit. To control.

Further, in each of the above configurations, the supply unit is provided in a cutting unit that cuts a long continuous sheet into a unit sheet having a predetermined length.

Further, in each of the above configurations, an AC motor for rotating the pressing roller at a constant rotation speed is provided.

According to the paper processing apparatus according to the present invention, the paper thickness detecting unit for detecting the thickness of the paper is provided, and the control unit is pressed by the feeding unit based on the thickness of the paper detected by the paper thickness detecting unit. Since the paper supply speed to the rollers is controlled, the paper can be supplied at an appropriate supply speed when the paper thickness fluctuates.

Further, when the control unit controls the paper supply speed to the pressing roller by the supply unit based on the paper thickness detected by the paper thickness detection unit so as not to exceed a predetermined upper limit value, the control unit of the paper Depending on the thickness, the paper can be fed at a speed that does not exceed the upper limit when the paper should not be fed to the pressing rollers at a very high speed.

Further, a distance detection unit between the pressing rollers for detecting the distance between the pair of pressing rollers is provided, and the control unit supplies the paper to the pressing rollers by the supply unit based on the detection result of the distance detecting unit between the pressing rollers. Is controlled, the supply speed can be adjusted to an appropriate speed according to the distance between the pressing rollers.

Further, when the control unit controls the speed at which the paper is supplied to the pressing rollers by the supplying unit so as not to exceed a predetermined upper limit value, based on the distance between the pressing rollers detected by the pressing roller distance detecting unit. Can supply paper at a speed that does not exceed the upper limit when the paper should not be supplied to the pressing rollers at a very high speed, depending on the distance between the pressing rollers.

Further, when the supply unit is provided in the cutting unit that cuts a long continuous paper into a unit paper having a predetermined length, the paper cut to a predetermined length by the cutting unit can be appropriately supplied to the pressing roller.

Further, when an AC motor for rotating the pressing roller at a constant rotation speed is provided, the occurrence of jam can be suppressed by adjusting the supply speed of the paper supplied to the pressing roller even if the rotation speed cannot be changed. ..

It is a vertical sectional view which shows the schematic structure of the paper processing apparatus which concerns on one Embodiment of this invention. This is a control flow of the paper processing apparatus. It is a control flow of the paper processing apparatus which concerns on other embodiment of this invention. It is a figure which shows the result of processing the paper by the paper processing apparatus which concerns on one Embodiment of this invention. It is a figure which shows the result of processing the paper by the paper processing apparatus which concerns on other embodiment of this invention. It is a figure which shows the result of processing the paper by the conventional paper processing apparatus. It is a figure which shows the result of processing the paper by the conventional paper processing apparatus.

(First Embodiment)
FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a first embodiment of the paper processing apparatus according to the present invention. The paper processing device 1 includes a cutting unit 25, a pressing unit 26, and a control unit 7. The cutting unit 25 includes a continuous paper supply unit 2, a tractor transport unit 3, an edge removal unit 4, and a cutting processing unit 5. The pressing unit 26 includes a unit paper supply unit 71, a pressing roller 72, and a unit paper placing unit 6.

The continuous paper supply unit 2 has a continuous paper placing unit 10 and a folding unit 11. The continuous paper placing portion 10 is provided at the lower part of the paper processing device 1. On the mounting table 20 of the continuous paper mounting portion 10, the continuous paper C, which is a long paper, is placed in a zigzag shape at the perforations M1 formed along the width direction.

In the continuous paper C as a long paper, perforations M1 are formed at predetermined lengths along the width direction orthogonal to the longitudinal direction. The predetermined length, which is the length between the front and rear perforations M1, is set to the dimension of the long side or the short side of the postcard. Further, in the continuous paper C, perforations M2 and M3 are formed along the longitudinal direction at two locations in the width direction. At the perforations M2 and M3 along the longitudinal direction, the paper is folded in a mountain fold and a valley fold, and can be folded in three outside. Further, the continuous paper C has a large number of feed holes H and perforations M4 and M5 at both edge portions E1 and E2 in the width direction. The feed holes H are formed side by side at regular intervals in the longitudinal direction of the paper. The feed hole H is a hole into which the pin 36 is inserted in the tractor transport unit 3. The perforations M4 and M5 are cut and removed at the edge removing portion 4. Continuous paper C is perforated M2. A crimping adhesive that is adhered when pressed with a pressure equal to or higher than a predetermined value is applied to the overlapping surface when the surface is folded in three in the outer direction by M3.

The continuous paper C on the mounting table 20 is supplied to the folding portion 11. The folding portion 11 includes a guide portion (not shown) that guides the continuous paper C so as to fold the continuous paper C in a mountain fold along the fold line F1 and make a valley fold along the fold line F2, and a presser roller 12 that presses the continuous paper C in the folded state. And.

The tractor transport unit 3 includes a pin-type tractor 31, a supply speed detection unit 32, and a transport motor 33. The pin-type tractor 31 is formed by projecting a large number of pins 36 all around the outer circumference of the forwarding chain 34. The pin-type tractor 31 inserts the pin 36 into the feed holes H formed at both edges in the width direction of the continuous paper C and rotationally drives the forwarding chain 34 by driving the transport motor 33 to transport the continuous paper C in the transport direction. It is designed to be transported to T. The forwarding chain 34 is hung on a pair of front and rear chain rollers 37.

The supply speed detection unit 32 includes an encoder 321 and an encoder detector 322. The encoder 321 is installed at one end of the rotation shaft of the front chain roller 37 on the downstream side of the continuous paper C in the transport direction T. The encoder detector 322 includes a light emitting element and a light receiving element, detects a notch formed in the encoder 321 and detects the amount of rotation of the chain roller 37 based on the notch formed in the encoder 321. Measure the transport speed of.

The edge removing portion 4 includes a slitter 45 in which a disk-shaped upper blade 42 and a lower blade 43 are installed in the unit case 41. Then, the upper blade 42 and the lower blade 43 are used to cut the edge regions E1 and E2 at both the left and right ends of the continuous paper C. Further, the edge removing portion 4 includes an edge collecting portion 44. The edge collecting portion 44 is installed below the slitter 45, and collects an unnecessary edge region separated from the continuous paper C by the slitter 45. The edge collecting portion 44 is formed in a box shape having an upper opening.

The cutting processing unit 5 includes a holding roller 51, a cutting auxiliary member 52, a paper detecting unit 53, a paper thickness detecting unit 54, and a contact / detaching drive unit 55. The holding roller 51 is composed of a delivery roller 57 and a high-speed roller 58. The delivery roller 57 feeds the continuous paper C to the downstream side. The delivery roller 57 is arranged so as to face the fixed roller 571 installed below the transport surface of the continuous paper C and the fixed roller 571 via the transport surface of the continuous paper C, and is movable in the contact / separation direction. Roller 572 and the like are included.

The high-speed roller 58 is installed at a predetermined amount from the delivery roller 57 to the downstream side in the transport direction T of the continuous paper C. The high-speed roller 58 rotates at a higher speed than the delivery roller 57. Similar to the delivery roller 57, the high-speed roller 58 is arranged so as to face the fixed roller 581 installed below the transport surface of the continuous paper C and the fixed roller 581 via the transport surface of the continuous paper C to be brought into contact with each other. A directionally movable contact / detachment roller 582 is included.

As the fixed rollers 571 and 581 and the contact and disengagement rollers 572 and 582 of the delivery roller 57 and the high-speed roller 58, respectively, a roller called a rubber roller whose outer peripheral portion is made of a rubber-like substance can be used. When the continuous paper C is sandwiched, the rubber-like material portions of both the fixed rollers 571 and 581 and the contact and disengagement rollers 572 and 582 are pressed against each other and slightly deformed, and the contact portions with each other have a slightly flat shape. It becomes.

The contact / detachment rollers 572 and 582 of both the delivery roller 57 and the high-speed roller 58 move in the contact / separation direction by the drive of the contact / separation drive unit 55, and can be brought into contact with and detached from the opposite fixed rollers 571 and 581. The contact / separation rollers 572 and 582 of both the delivery roller 57 and the high-speed roller 58 are moved synchronously in the contact / separation direction.

Both the fixed rollers 571 and 581 of the delivery roller 57 and the high-speed roller 58 are connected to the transfer motor 33 constituting the tractor transfer unit 3 via a rotation transmission mechanism (not shown). When the continuous paper C is sandwiched between the contact / detachment rollers 572 and 582 and the fixed rollers 571 and 581, the contact / release rollers 572 and 582 are driven to rotate with the rotation of the fixed rollers 571 and 581. The rotation transmission mechanism is configured such that the high-speed roller 58 rotates faster than the delivery roller 57 by a predetermined ratio. Therefore, the transport speed of the paper by the high-speed roller 58 when the paper is sandwiched is increased by a predetermined ratio with respect to the transport speed by the delivery roller 57.

The paper transport speed associated with the rotation of the delivery roller 57 and the high-speed roller 58 can be detected from the paper transport speed of the continuous paper C by the supply speed detection unit 32 using the pin-type tractor 31. As described above, the amount of rotation of the pin-type tractor 31 is detected by the encoder detector 322 provided in the encoder 321 and sent to the control unit 7.

The pin-type tractor 31, the delivery roller 57, and the high-speed roller 58 form a supply unit that supplies paper to the pressing unit 26 on the downstream side. Therefore, the supply unit is provided in the cutting unit 25 that cuts the long continuous paper C into the unit paper D having a predetermined length. The paper transport speed by the pin-type tractor 31, the delivery roller 57, and the high-speed roller 58 corresponds to the supply speed at which the paper is supplied from the cutting portion 25 to the pressing portion 26. The control unit 7 can grasp the supply speed when the paper is supplied from the cutting unit 25 to the pressing unit 26 by detecting the conveying speed of the continuous paper C by the supply speed detecting unit 32 using the pin type tractor 31. Based on this, the supply speed setting can be changed.

Since the high-speed roller 58 is driven synchronously with the pin-type tractor 31 and rotates at a high speed of a predetermined ratio with respect to the pin-type tractor 31, the speed at which the paper actually reaches the pressing portion 26 is the pin-type tractor 31. It becomes a predetermined ratio faster than the paper transport speed by.

The cutting auxiliary member 52 is arranged between the delivery roller 57 and the high-speed roller 58. The cutting auxiliary member 52 is formed in a plate shape and extends in the width direction of the continuous paper C. Instead of the plate-shaped blade, the cutting auxiliary member 52 may be formed in a roller shape and the position of contact with the paper may be slightly projected. The tip of the cutting auxiliary member 52 is installed so as to project slightly downward from the surface where the delivery roller 57 and the high-speed roller 58 connect the surfaces holding the continuous paper C, respectively. As a result, when the continuous paper C is sandwiched between the delivery roller 57 and the high-speed roller 58 at a predetermined timing and tension is applied to the continuous paper C due to the difference in rotation speed, the tip of the cutting auxiliary member 52 comes into contact with the continuous paper C. Then, the continuous paper C is cut at the perforations M1 formed along the width direction orthogonal to the longitudinal direction of the continuous paper C. The cutting auxiliary member 52 provides an opportunity to cut the continuous paper C into the unit paper D having a predetermined length.

The paper detection unit 53 is provided near the downstream side of the cutting auxiliary member 52 and is provided at a substantially central portion in the width direction of the paper. The paper detection unit 53 includes an optical system detector including a light emitting element installed above the paper transport surface and a light receiving element installed below the paper transport surface. The paper detection unit 53 is installed so that the light of the light emitting element is emitted toward the paper transport surface. When the paper transported on the transport surface blocks the light emitted from the light emitting element, the amount of light received by the light receiving element installed below the transport surface is reduced. From this, the presence or absence of paper on the transport surface is determined. In addition, if necessary, the thickness of the paper and the number of stacked sheets of paper are detected from the rate of decrease in the amount of received light. The detection signal from the paper detection unit 53 is sent to the control unit 7.

The paper thickness detection unit 54 is installed near the upstream side of the delivery roller 57. The paper thickness detection unit 54 includes a paper thickness detection roller 541 and a paper thickness detector 542. The paper thickness detecting roller 541 is urged downward by an elastic member such as a spring (not shown). The paper thickness detection roller 541 is configured to be movable in the vertical direction according to the thickness of the continuous paper C when the continuous paper C is sandwiched between the support rollers 543 arranged to face each other via the transport surface of the continuous paper C. Will be done. The paper thickness detector 542 detects the amount of movement of the paper thickness detecting roller 541 in the vertical direction. The detection signal of the paper thickness detector 542 is sent to the control unit 7.

The pressing unit 26 includes a unit paper supply unit 71, a pressing roller 72, a drive motor 74, a pressing roller speed detecting unit 76, and a paper detecting unit 77. The unit paper supply unit 71 has a pair of upper and lower transfer rollers 711 and 712. The unit paper supply unit 71 feeds the unit paper D, which is folded and cut to a predetermined length, into the pressing roller 72.

A pair of upper and lower pressing rollers 72 are installed. The pressing roller 72 presses the paper on which the adhesive is applied to the overlapping surfaces of the paper with a pressure equal to or higher than a predetermined value and adheres the paper. The distance between the pair of pressing rollers 72 can be manually adjusted by the user according to the thickness of the paper. The pressing roller 72 is connected to the unit paper supply unit 71 by a connecting member. The pressing roller 72 and the unit paper supply unit 71 are rotationally driven synchronously by the drive motor 74.

The type of the drive motor 74 is not particularly limited, and AC motors such as single-phase AC motors and three-phase AC motors, DC motors, brushless DC motors, servo motors, stepping motors, and the like can be used. Further, if necessary, an inverter or a converter may be installed. Of these, considering the load applied to the pressing roller 72, it is preferable to use an AC motor. When the drive motor 74 is an AC motor, the pressing roller 72 may be rotated at a constant rotation speed, and if necessary, an inverter or a converter may be installed to change the rotation speed of the pressing roller 72.

The pressing roller speed detection unit 76 includes an encoder 761 and an encoder detector 762. The encoder 761 is installed on the rotation shaft of one of the pair of upper and lower transport rollers 711 and 712. The encoder detector 762 detects the amount of rotation of the encoder 761 and transmits it to the control unit 7. The pressing roller speed detecting unit 76 detects the rotational speed of the conveying rollers 711 and 712 using the encoder 761, and thereby the pressing roller 72 connected to the conveying rollers 711 and 712 by a connecting member and rotates synchronously. Detect the rotation speed.

The paper detection unit 77 is installed between the transport rollers 711 and 712 and the pressing rollers 72. The paper detection unit 77 is provided at a substantially central portion in the width direction of the paper. The paper detection unit 77 is composed of a reflection type optical system detector including a light emitting element and a light receiving element installed above the paper transport surface. The detection signal from the paper detection unit 77 is sent to the control unit 7.

The unit paper loading unit 6 shown in FIG. 1 includes a stacker device 61 that sequentially loads the unit paper D sent out from the pressing unit 26 from the downstream to the upstream in an upright state.

The control unit 7 includes a CPU (central processing unit), a storage unit such as a ROM or RAM, and the like. The control unit 7 controls the operation of the entire paper processing device 1. At that time, the control unit 7 inputs and sets the detection signals sent from the various detectors 32, 53, 54, 76, and 77 and the setting unit 8 composed of the operation panel by the user of the paper processing device 1. Based on the information, the necessary motors 33, 74, 55 are driven by a predetermined amount at a predetermined timing corresponding to these.

The setting unit 8 is configured so that the thickness of the paper automatically detected by the paper thickness detecting unit 54 can be manually input and set. In this case, the setting unit 8 is configured as a paper thickness detecting unit that detects the thickness of the paper. When the thickness of the paper is detected both automatically and manually, the storage unit of the control unit 7 stores the priority order regarding which detection result is used.

Further, the user can manually set the distance between the pair of pressing rollers 72 by the setting unit 8. In this case, the setting unit 8 is configured as a pressing roller distance detecting unit that detects the distance between the pair of pressing rollers 72. A detection device that can automatically detect the distance between the pair of pressing rollers 72 may be installed. When the distance between the pressing rollers 72 is detected both automatically and manually, the storage unit of the control unit 7 stores the priority order of which detection result to use.

The control unit 7 controls the speed at which the paper is supplied to the pressing roller 72 by the feeding unit based on the detection result of the pressing roller speed detecting unit 76. The control unit 7 controls to slow down the paper supply speed to the pressing roller 72 by the feeding unit when the rotation speed of the pressing roller 72 detected by the pressing roller speed detecting unit 76 is slower than a preset threshold value. .. The control unit 7 is based on the values of a plurality of transport speeds detected by the pressing roller speed detection unit 76 at a plurality of locations of the paper of a predetermined length when the paper of a predetermined length is pressed and conveyed by the pressing roller 72. Then, the feeding speed of the paper to the pressing roller 72 by the feeding unit is controlled.

Further, the control unit 7 controls the paper supply speed to the pressing roller 72 by the supply unit based on the paper thickness detected by the paper thickness detection unit 54. The control unit 7 controls the paper supply speed to the pressing roller 72 by the supply unit so as not to exceed a predetermined upper limit value based on the paper thickness detected by the paper thickness detection unit 54. The control unit 7 controls the feeding speed of the paper to the pressing roller 72 by the feeding unit based on the detection result of the pressing roller distance detecting unit. The control unit 7 controls the feeding speed of the paper to the pressing roller 72 by the feeding unit based on the detection result of the pressing roller distance detecting unit.

Next, the operation of the paper processing device 1 will be described. The continuous paper C placed on the mounting table 20 of the continuous paper placing portion 10 is set so that the portion constituting the uppermost tip portion is pulled up by the user and folded into an outer tri-fold at the guide portion. .. Then, the feed hole H is engaged with the tractor pin 36 of the pin type tractor 31 which is pressed by the pressing roller 12 and whose facing interval in the width direction is adjusted in the tractor transport unit 3. When the user performs the operation of starting the processing of the continuous paper C from the setting unit 8, the control unit 7 drives the transfer motor 33.

By driving the transport motor 33, the continuous paper C on the mounting table 20 is sequentially folded by the folding portion 11, and is transported to the downstream side by the tractor transport portion 3 in the form of an outer tri-fold to reach the edge removing portion 4. .. At this time, the control unit 7 accelerates the transfer speed of the continuous paper C by the tractor transfer unit 3 detected by the supply speed detection unit 32 until the transfer speed of the continuous paper C by the tractor transfer unit 3 reaches a predetermined value set in advance. Then, when the transport speed by the tractor transport unit 3 detected by the supply speed detection unit 32 reaches a predetermined value, the transport motor 33 of the tractor transport unit 3 is controlled so as to maintain this predetermined value.

In the edge removing portion 4, the continuous paper C is collected in the edge collecting portion 44 after the edge regions E1 and E2 are cut off by the slitter 45. The continuous paper C from which the edge regions E1 and E2 have been removed is conveyed to the downstream cutting processing unit 5. In the cutting processing unit 5, the continuous paper C passes below the cutting auxiliary member 52, passes through the installation position of the paper detecting unit 53, and reaches between the contact / detaching roller 582 of the high-speed roller 58 and the fixed roller 581.

The control unit 7 drives the contact / detachment drive unit 55 before the perforation M1 forming position of the continuous paper C reaches the cutting auxiliary member 52 installation position by a predetermined amount. The continuous paper C is sandwiched between the delivery roller 57 and the high-speed roller 58 by driving the contact / detachment drive unit 55. Tension is applied to the continuous paper C due to the difference in rotation speed between the rollers 57 and 58. The perforation M1 of the continuous paper C reaches the installation position of the cutting auxiliary member 52, and the perforation M1 of the continuous paper C to which tension is applied comes into contact with the tip of the cutting auxiliary member 52, so that the continuous paper C has a predetermined length. It is cut into the unit paper D. As a result, the unit paper D is processed into a piece of paper that is folded in three outside the predetermined length.

The unit sheet D is conveyed to the downstream side by the high-speed roller 58 and is supplied to the pressing portion 26 at a predetermined supply speed. In the pressing unit 26, the unit paper D is conveyed to the pressing roller 72 by the unit paper supply unit 71, and is pressed by the pressing roller 72 with a pressure equal to or higher than a predetermined value. From this, the unit paper D is adhered by the adhesive pre-applied to the overlapping surfaces of the papers. The bonded paper sent out from the pressing roller 72 is loaded on the unit paper mounting portion 6.

In the above processing step, in the pressing portion 26, the paper folded in three outside is sandwiched and conveyed by the pair of pressing rollers 72. The distance between the pair of pressing rollers 72 is appropriately manually adjusted so that the paper is pressed with a pressure larger than a predetermined value and can be properly adhered by the adhesive applied to the overlapping surfaces of the paper. At the time of adjustment, various conditions such as the thickness and type of paper, the type and amount of adhesive applied to the overlapping surfaces, and deterioration of adhesive performance due to the passage of time after application are taken into consideration. As a result, the adhesive force of the unit paper obtained by pressing can be stabilized.

The control unit 7 controls the drive motor 74 of the pressing unit 26 so that the pressing roller 72 rotates at a preset constant speed. However, when the distance between the pair of pressing rollers 72 is set shorter than the predetermined value used for ordinary paper and the paper is pressed and adhered with a pressure higher than usual, the pressing rollers 72 are excessively loaded and the paper is subjected to an excessive load. It becomes difficult to carry the paper by sandwiching it, and the paper transport speed may decrease. If the conveying speed of the preceding paper is lower than a preset constant speed, the distance between the sheets and the following paper may be shortened and jam may occur.

Further, when a plurality of electric devices are connected to one outlet, the power supply voltage of the drive motor 74 of the pressing roller 72 may decrease to, for example, 90 V or less. In such a case, the torque for rotationally driving the pressing roller 72 is reduced. Then, the rotation speed of the pressing roller 72 when the paper is sandwiched is reduced, and the paper conveying speed tends to be slowed down.

Even when the rotation speed of the pressing roller 72 is reduced in this way, the rotation speed of the pressing roller 72 does not pinch the paper after the preceding paper is fed until the subsequent paper is started to be pinched. It can be recovered while the load is not applied. Therefore, if there is sufficient time for the subsequent paper to be sandwiched by the pressing roller 72, the subsequent paper can be started to be conveyed at a constant speed after recovery.

However, when the succeeding paper reaches the nip position of the pressing roller 72 before the pressing roller 72 recovers to a constant speed, the subsequent paper is started to be conveyed in a state where the rotation speed of the pressing roller 72 is slower than the constant speed. It ends up. In this case, it becomes more difficult to rotate the pressing roller 72 at a constant speed, and it becomes more difficult to convey the paper. As a result, the transport speed by the pressing roller 72 gradually decreases, and jam occurs.

Therefore, in the first embodiment, when the paper transport speed by the pressing roller 72 fluctuates, the paper feeding speed to be supplied to the pressing portion 26 is adjusted. When the paper transport speed by the pressing roller 72 is lower than a preset predetermined value, the paper feeding speed to be supplied to the pressing portion 26 is reduced by a predetermined amount accordingly.

The fluctuation of the paper transport speed by the pressing roller 72 can be grasped based on the fluctuation of the rotation speed of the pressing roller 72. The rotation speed of the pressing roller 72 is detected by the pressing roller speed detecting unit 76. The supply speed of the paper supplied to the pressing unit 26 is adjusted according to the rotation speed of the pressing roller 72 detected by the pressing roller speed detecting unit 76. Therefore, the control unit 7 detects the rotation speed of the pressing roller 72 by the pressing roller speed detecting unit 76 of the pressing unit 26, and based on the obtained detection result, the feeding speed of the paper to the pressing roller 72 by the supply unit. To control.

The control unit 7 determines whether or not the paper transport speed by the pressing roller 72 is slower than a predetermined threshold value. Therefore, the control unit 7 determines whether the rotation speed of the pressing roller 72 detected by the pressing roller speed detecting unit 76 is slower than a preset threshold value, and if it is slower than the threshold value, the pressing roller 72 by the supply unit. Control to slow down the paper supply rate to. Therefore, the control unit 7 controls the drive amount of the transfer motor 33 of the cutting unit 25, and reduces the supply speed of the paper to the pressing roller 72 by a predetermined amount. As a result, the length between the papers sequentially supplied to the pressing portion 26 is not shortened, and collision of the front and rear papers is avoided.

A plurality of threshold values for determining whether to change the supply speed supplied to the pressing unit 26 can be set. The control unit 7 can suppress jam more appropriately and process the paper by changing the supply speed stepwise according to each set threshold value.

The control unit 7 sends a drive control signal for driving the transfer motor 33 based on the detection result of the pressing roller speed detection unit 76. As a result, the tractor transport unit 3, the delivery roller 57, and the high-speed roller 58 are synchronized in speed adjustment. The adjusted speed will be a preset speed corresponding to the detection result of the pressing roller speed detection unit 76.

FIG. 2 shows a flowchart for controlling the paper supply speed to the pressing roller 72. In FIG. 2, when the paper processing process is started, the paper transport speed in the pressing portion 26 is detected in step 1.

When the method of detecting the paper transport speed in the pressing unit 26 is based on the rotation speed of the pressing roller 72, for example, the encoder detector 762 detects a predetermined number of notches of the encoder 761 such as one or a plurality of notches. Get the time required for the process at any time. The rotation speed of the pressing roller 72 can be calculated by dividing the amount of rotation of the pressing roller 72 corresponding to the number of notches of the encoder 761 by the acquired time. In this case, the values detected by the pressing roller speed detection unit 76 are the time required for the rotation of the encoder 761 and the rotation amount and rotation angle of the encoder 761 at predetermined time intervals. These values are converted into paper transfer speeds.

It is preferable that the paper transport speed is detected a plurality of times while the paper is sandwiched and conveyed by the pressing roller 72. The timing for detecting the transport speed may be a predetermined portion of the unit paper D, such as from the time when the tip of the unit paper D is sandwiched by the pressing roller 72 to a predetermined length, or a range of a predetermined position to a predetermined length of the unit paper D. Often, it may be detected a plurality of times at predetermined time intervals or predetermined length intervals. Further, the transport speed may be detected in the entire range of one unit sheet D having a predetermined length from the front end to the rear end of the unit sheet D. Of these, it is preferable to detect the transport speed in the entire range of one unit paper D, because it is possible to reflect the influence of the paper thickness, the folded state, and the like, which are different for each paper, on the transport speed. Further, the transport speed of a plurality of unit sheets D may be detected, or may be detected every predetermined number of sheets.

It can be assumed that the timing at which the paper is sandwiched by the pressing roller 72 and the transfer is started is after a predetermined time has elapsed from the time when the paper tip is detected by the paper detection unit 77. This predetermined time is preset based on experimental results and calculated values.

Alternatively, the timing at which the paper is sandwiched by the pressing roller 72 and the transfer is started can be grasped from the rotation amount of the paper detection unit 77 and the encoder 761. That is, for example, when the paper detection unit 77 detects that the tip of the unit paper D has reached the paper detection unit 77 installation position, the control unit 7 starts the measurement of the encoder 761 by the encoder detector 762. After that, when the amount of rotation of the encoder 761 reaches the amount of rotation required for the tip of the unit paper D to reach the nip portion of the pressing roller 72, the timing at which the tip of the paper is pinched by the pressing roller 72 may be set. can.

By determining the timing at which the paper is pinched by the pressing roller 72 and the transfer is started based on the amount of rotation of the paper detecting unit 77 and the encoder 761, the timing at which the paper is pinched by the pressing roller 72 is more accurately determined. Can be grasped. The rotation speed of the pressing roller 72 varies depending on the conveying state of the preceding paper.

Therefore, when the pinching start timing of the succeeding paper by the pressing roller 72 is set after a lapse of a predetermined time from the detection of the tip of the succeeding paper, the holding of the succeeding paper is actually started even though the succeeding paper is not yet pinched by the pressing roller 72. As a result, there is a risk that the detection of the paper transport speed will be started.

In this case, the detected paper transfer speed becomes faster than it actually is, and the risk of jam increases. On the other hand, by using the rotation amount of the encoder 761, the amount of the succeeding paper actually conveyed by the transfer rollers 711 and 712 can be measured. It is possible to reduce the deviation of the value of the paper transport speed by the pressing roller 72 calculated by the control unit 7 based on the detection value of the transport speed detection unit 76 with respect to the actual paper transport speed by the pressing roller 72.

The length of the paper transport direction T can be determined from the value set by the user using the installation unit 8. Further, the control unit 7 can also grasp the length of the paper transport direction T by using the detection value of the paper detection unit 77. That is, when the unit paper supply unit 71 supplies the paper to the pressing roller 72, the length of time during which the paper detection unit 77 receives the light reflected by the paper on the transport surface is used to determine the paper transport direction T. The length can be calculated.

By using the detection result of the paper detection unit 77 in this way, even if the value set by the user is incorrect, the correct length of the paper transport direction T can be obtained. As a result, it is possible to avoid setting the range in which the transfer speed of the paper pressing roller 72 to be detected to be an erroneous range. Further, when the paper is not properly conveyed, that is, when the thickness of the paper is thinner than usual, slippage is likely to occur when the paper is conveyed by the transfer rollers 711 and 712. Even in such a case, the transport speed can be detected in substantially the same range while the paper is actually sandwiched and transported by the pressing roller 72.

In step 2, it is determined whether or not the paper transport speed detected in step 1 is slower than a predetermined first threshold value set in advance. When a plurality of transfer speed values are acquired in step 1, the paper supply speed to the pressing roller 72 by the supply unit can be controlled based on the plurality of transfer speed values. That is, each of these plurality of values can be compared with the first threshold value. Further, instead of this, for example, the average value for one sheet of unit paper D may be used, or the cumulative value or the median value may be used.

As still another method, among a plurality of values representing the transport speed, a value indicating the slowest transport speed or a value indicating the fastest transport speed may be used as a representative. On the contrary, the value indicating the slowest or fastest transport speed may be excluded, and the average value, cumulative value or representative value of the remaining values may be used.

As yet another method, the amount of change in the transport speed may be used. When the amount of change in the conveying speed is used, for example, when the amount of change is larger than a predetermined threshold value, it is determined that the paper is not properly conveyed by the pressing roller 72, and the subsequent feeding speed of the paper to the pressing portion 26 is slowed down. can do. Of these, it is preferable to use the average value of the transport speed for one sheet of the unit paper D in that the transport speed of the entire paper can be compared with the threshold value for judgment.

When the paper transport speed in step 2 is faster than the first threshold value, step 2 is not satisfied and the process proceeds to step 3. In step 3, the paper supply speed to the pressing portion 26 is maintained at a predetermined first speed, and the paper processing process is continued. The first speed in step 3 is the same as the supply speed at the start of processing, and the supply speed has not been changed.

The process proceeds to step 4 to determine whether or not the conditions for ending the machining process are satisfied. As a condition for ending the processing, for example, all the paper placed on the mounting table 20 can be conveyed to the downstream side, cut, and pressed to disappear. Further, as another condition, the processing process of the number of sheets set in advance by the user using the setting unit 8 may be executed.

In step 4, while the unprocessed paper remains, step 4 is not satisfied and the process returns to step 1. After that, while the paper transport speed in the pressing portion 26 is maintained faster than the first threshold value, steps 1 to 4 are repeated until the condition for not satisfying step 2 and the condition for ending the processing process is satisfied. When the conditions for ending the processing are satisfied, step 4 is satisfied and the processing is completed.

In step 2, when the paper transport speed in the pressing portion 26 is slower than the first threshold value, step 2 is satisfied and the process proceeds to step 5. In step 5, it is determined whether the paper transport speed is slower than the second threshold value. The second threshold value is set to be a value slower than the first threshold value. When the paper transport speed in step 5 is faster than the second threshold value, step 5 is not satisfied and the process proceeds to step 6.

In step 6, the feeding speed of the paper to the pressing portion 26 is set to a predetermined second speed set in advance. This second speed is set to a value slower than the first speed, which is the supply speed to the pressing portion 26 at the start of processing. The process proceeds to step 7, and the processing is continued with the supply speed set to the second speed. The process proceeds to step 8 to determine whether or not the conditions for ending the machining process are satisfied. In step 8, while the unprocessed paper remains, step 8 is not satisfied and the process proceeds to step 9. In step 9, the paper transport speed in the pressing portion 26 is detected. The method of detecting the paper transport speed at the pressing portion 26 in step 9 is the same as in step 1.

Return from step 9 to step 5. While the paper transport speed in the pressing portion 26 is maintained faster than the second threshold value, steps 5 to 9 are repeated until the conditions for ending the processing are satisfied. At this time, even if the paper conveying speed in the pressing unit 26 becomes faster than the first threshold value in step 2, the supply speed from the cutting unit 25 that supplies the paper to the pressing unit 26 is from the second speed to the first speed. It will not be returned to and the supply speed will not accelerate. In this way, even if the length between the front and rear papers becomes longer after setting the paper supply speed to the second speed in step 6, the paper supply from the cutting unit 25 is supplied until the end of processing. The speed maintains the second speed.

In step 5, when the paper transport speed in the pressing portion 26 becomes slower than the second threshold value, step 5 is satisfied and the process proceeds to step 10. In step 10, it is determined whether the paper transport speed is slower than the third threshold value. The third threshold value is set so that the paper transport speed is slower than the second threshold value in step 5.

In step 10, when the paper conveying speed in the pressing portion 26 is faster than the third threshold value and the step 10 is not satisfied, the process proceeds to step 11, and the supply speed to the pressing portion 26 is set to the third speed. The process is continued in step 12. Then, in the same manner as described above, while the paper transport speed in the pressing portion 26 is faster than the third threshold value, steps 10 to 14 are repeated until the condition for ending the processing is satisfied.

In step 10, when the paper transport speed in the pressing portion 26 is slower than the third threshold value, the process proceeds to step 15 to determine whether the transport speed is slower than the fourth threshold value. When the transport speed is equal to or higher than the fourth threshold value, the process proceeds to step 16 and the paper supply speed to the pressing portion 26 is set to the fourth speed, which is even slower than the third speed. The processing is continued in step 17, and in the same manner as described above, while the paper transport speed in the pressing portion 26 is faster than the fourth threshold value, steps 15 to 19 are repeated until the conditions for terminating the processing are satisfied.

In step 15, when the paper conveying speed in the pressing portion 26 is faster than the fourth threshold value and the step 15 is not satisfied, the process proceeds to step 16 and the supply speed to the pressing portion 26 is set to the fourth speed. The process is continued in step 17. Then, in the same manner as described above, while the paper transport speed in the pressing portion 26 is faster than the fourth threshold value, steps 15 to 19 are repeated until the number of sheets for which the processing execution is set is processed.

In step 15, when the paper transport speed is slower than the fourth threshold value, the process proceeds to step 20 and the supply speed to the pressing portion 26 is set to a fifth speed slower than the fourth speed. Then, steps 21 to 22 are repeated while maintaining the fifth speed until the condition for ending the processing is satisfied.

As a result, even if the paper transport speed in the pressing unit 26 decreases, the supply speed of the cutting processing unit 5 that supplies the paper to the pressing unit 26 is gradually reduced according to the rate of decrease in the speed of the pressing unit 26. Can be made to. Therefore, it is possible to prevent the distance between the papers transported back and forth from being shortened, and to maintain the distance between the papers so as to be equal to or higher than a predetermined value as much as possible to suppress the occurrence of jam.

Further, in the first embodiment, after the processing is started, once the paper supply speed is set to any of the first speed to the fifth speed, the supply speed is not increased again and accelerated. .. Therefore, it is easy to create a program. Further, since the supply speed does not fluctuate so much, it is possible to prevent the timing at which the perforation M1 of the paper comes into contact with the cutting auxiliary member 52 in the cutting processing unit 5 from shifting. If the paper is separately formed with other perforations that are neither fold lines nor cutting lines along the transport direction T or along the width direction, such perforations are formed on the cutting auxiliary member 52 at the cutting position of the paper. If the timing at which the perforations M1 come into contact with each other is deviated, the perforations M1 may be cracked due to an impact. However, when the transport speed of the cutting portion 26 does not fluctuate so much, such a problem can be suppressed.

Based on the above, the paper processing device 1 according to the first embodiment includes a control unit 7 that controls the paper supply speed to the pressing roller 72 by the feeding unit based on the detection result of the pressing roller speed detecting unit 76. Therefore, the supply speed of the subsequent paper supplied to the pressing roller 72 can be adjusted according to the conveying speed of the preceding paper by the pressing roller 72, and the space between the front and rear papers can be appropriately maintained.

Further, the control unit 7 controls to slow down the paper feeding speed to the pressing roller 72 by the feeding unit when the paper conveying speed detected by the pressing roller speed detecting unit 76 is slower than a preset threshold value. Therefore, it is possible to prevent the distance between the papers transported back and forth from being shortened and maintain the value at a predetermined value or more as much as possible to suppress the occurrence of jam.

Then, when the control unit 7 conveys the paper of a predetermined length while pressing it by the pressing roller 72, the values of the plurality of conveying speeds detected by the pressing roller speed detecting unit 76 at a plurality of places of the paper of the predetermined length. When controlling the paper supply speed to the pressing roller 72 by the supply unit, the paper is supplied at a more appropriate supply speed than when an appropriate supply speed cannot be obtained from only one transfer speed of the paper. It can be supplied to the pressing portion 26.
When the transport speed fluctuates due to a different folding state or a slight difference in thickness for each paper, the paper can be supplied to the pressing portion 26 at an appropriate supply speed.

Further, since the supply unit is provided in the cutting unit 25 that cuts the long continuous paper C into the unit paper D having a predetermined length, the unit paper D obtained by being cut to the predetermined length by the cutting unit 25 is appropriately used. It can be supplied to the pressing portion 26. Then, in the paper processing apparatus 1 in which both the cutting process and the bonding process by pressing are performed on the paper, the occurrence of jam can be suppressed.

Further, when the pressing roller 72 is provided with an AC motor that rotates the pressing roller 72 at a constant rotation speed, the pressing roller 72 is rotated at a constant speed by the AC motor, and even if the rotation speed cannot be changed, the pressing roller 72 is moved to the pressing roller 72. By adjusting the supply speed of the supplied paper, it is possible to prevent the distance between the papers from becoming short, and it is possible to suppress the occurrence of jam.

(Second Embodiment)
In the first embodiment, after the paper transport speed in the pressing portion 26 once falls below any of the preset first to fourth threshold values, the transport speed of the pressing portion 26 recovers to reduce the threshold value. Even when the speed was exceeded, the speed of supplying the paper to the pressing portion 26 was kept reduced and was not accelerated. However, in the second embodiment, when the transport speed of the pressing portion 26 falls below the first to fourth threshold values and then becomes faster than the first to fourth threshold values, the paper supply speed to the pressing portion 26 is increased. Allow it to be raised. That is, in this second embodiment, the supply speed for supplying the paper to the pressing portion 26 can be both decreased and increased according to the conveying speed of the paper in the pressing portion 26.

FIG. 3 shows a flowchart of the drive motor control according to the second embodiment. In FIG. 3, steps 101 and 102 are the same as steps 1 and 2 in FIG. In step 103 of FIG. 3, the supply speed for supplying the paper to the pressing portion 26 is set to the first speed. The first speed set in step 103 maintains the paper supply speed to the pressing portion 26 at the start of processing as it is, and the supply speed is not changed immediately after the start of processing. The process proceeds to step 104, and after continuing the processing, the process proceeds to A. As shown in the upper right of FIG. 3, the process proceeds from A to step 105. In step 105, it is determined whether or not the condition for ending the machining process is satisfied.

In step 105, while the unprocessed paper remains, step 105 is not satisfied and the process returns to step 101. Then, as in the first embodiment, while the paper transport speed in the pressing portion 26 is maintained faster than the first threshold value, steps 101 to 105 are repeated until the conditions for ending the processing are satisfied. .. Then, when the conditions for terminating the processing process are satisfied, the process ends.

When step 102 of FIG. 3 is satisfied, the process proceeds to step 106. Steps 106 to 108 in FIG. 3 are the same as steps 5 to 7 in FIG. From step 108 of FIG. 3, the process proceeds to A. Then, the process proceeds from A in the upper right of FIG. 3 to step 105, and it is determined whether or not the condition for ending the machining process is satisfied.

In step 105, while the unprocessed paper remains, step 105 is not satisfied and the process returns to step 101. Then, in step 101, the paper transport speed at the pressing portion 26 is detected. If the transport speed detected in step 101 is faster than the first threshold value, step 102 is not satisfied, the process proceeds to step 103, and the supply speed is set to the first speed. As described above, in step 107, even if the supply speed is once set to the second speed and the processing is performed, when the transport speed of the pressing portion 26 becomes faster than the first threshold value, the first speed is again obtained. Is set to.

Then, when the paper transport speed in the subsequent pressing portion 26 is maintained faster than the first threshold value, steps 101 to 105 are repeated until the conditions for ending the processing are satisfied.

When step 106 of FIG. 3 is satisfied, the process proceeds to step 109. Steps 109 to 111 are the same as steps 10 to 12 in FIG. The process proceeds from step 111 in FIG. 3 to A. Similar to the case of proceeding from steps 104 and 108 to A, the process proceeds from A in the upper right of FIG. 3 to step 105, and it is determined whether or not the condition for ending the machining process is satisfied. While the unprocessed paper remains, step 105 is not satisfied and the process returns to step 101 again.

Even when the process proceeds from step 111 to steps A to steps 105 and 101, if the paper transport speed in the pressing portion 26 detected in step 101 is faster than the first threshold value, the process proceeds to step 103 and the supply speed is set to the first speed. Set. If the paper transport speed is slower than the first threshold value and is equal to or higher than the second threshold value, the process proceeds from step 106 to step 107, and the supply speed to the pressing portion 26 is set to the second speed. In these cases, in step 110, the supply speed is set to the third speed, and after the processing is performed, the supply speed is set to a speed higher than the third speed again, and the supply speed is accelerated.

When step 109 is satisfied and the process proceeds to step 112, it is determined whether or not the paper transport speed in the pressing portion 26 is maintained faster than the fourth threshold value, and when it is faster than the fourth threshold value, the supply speed is set to the fourth speed in step 113. Is set to, the process is continued in step 114, the process returns to step 101 via A, and the supply speed to the pressing unit 26 is reset according to the detected transport speed of the pressing unit 26.

When step 112 is satisfied, the process proceeds to step 115, the paper supply speed to the pressing portion is set to the fifth speed, the process is continued, and the process returns to A in the same manner as described above.

In the second embodiment, the supply speed of the paper to be supplied to the pressing unit 26 is adjusted according to the paper transport speed, and the paper is supplied depending on which of the first to fourth thresholds the paper transport speed is in. Since the speed is reset again, the processing time can be shortened.

(Third Embodiment)
In the third embodiment, in addition to adjusting the supply speed to the pressing portion 26 based on the conveying speed in the pressing portion 26 of the first and second embodiments, the thickness of the paper and the distance between the pair of pressing rollers 72. Adjust the supply speed in consideration of. Considering both the thickness of the paper and the distance between the pressing rollers 72, the paper supply speed is adjusted so as not to be too high in a situation where the paper transfer by the pressing rollers 72 may be excessively loaded.

The thickness of the paper is detected by the paper thickness detecting unit 54. The timing for detecting the thickness of the paper is preferably at the start of the processing of the paper. By detecting the thickness of the paper at the start of the processing, the supply speed in the subsequent processing can be adjusted according to the detection result. Further, by detecting the thickness of the paper at the start of the processing, the thickness of the paper can be detected while the transport speed of the paper is slower than when the thickness of the paper is detected after the processing has progressed to some extent. Therefore, the thickness of the paper can be detected with higher accuracy.

The distance between the pressing rollers 72 is detected by the pressing roller distance detecting unit. When the distance detection unit between the pressing rollers is composed of the setting unit 8, the user manually inputs the distance between the setting unit 8 and the pressing roller 72 numerically, or selects from a plurality of options. Make settings. The storage unit of the paper processing device 1 stores a data table relating to an upper limit value of the supply speed for supplying paper to the pressing unit 26, which is set based on both the values of the paper thickness and the distance between the pressing rollers 72. ing. The numerical values stored in the data table are preset based on the experimental results and the like.

When the control unit 7 acquires the detected value of the paper thickness detecting unit 54 and the distance between the pressing rollers 72 set by the user from the pressing roller distance detecting unit, the control unit 7 refers to the data table stored in the storage unit and supplies the data. Set the upper limit of speed. Then, the drive amount of the transfer motor 33 is controlled so that the supply speed to the pressing portion 26 does not exceed the upper limit value.

When setting the upper limit value of the supply speed in this way, for example, in the control flow of FIG. 2, the paper transport speed in the pressing portion 26 detected in step 1 is determined in steps 2, 5, 10, and 15. Even if it is equal to or higher than each threshold value, when the supply speed set in steps 3, 6, 11 and 16 according to each threshold value exceeds the upper limit value, such setting is not performed and the upper limit value or less is not set. Is set to the speed of. Then, in the middle of the processing process, when the paper transport speed in the pressing portion 26 decreases and becomes slower than the threshold values determined in steps 2, 5, 10 and 15, the supply speed does not exceed the upper limit value. To a slower speed.

As described above, in the third embodiment, the control unit 7 controls the paper supply speed to the pressing roller 72 by the supply unit based on the paper thickness detected by the paper thickness detection unit 54. Even when the paper transport speed in the pressing portion 26 fluctuates according to the thickness of the paper, the paper can be supplied to the pressing portion 26 at an appropriate supply speed, and the occurrence of jam can be suppressed.

Further, the control unit 7 controls the paper supply speed to the pressing roller 72 by the supply unit based on the paper thickness detected by the paper thickness detection unit 54 so as not to exceed a predetermined upper limit value. Depending on the thickness of the paper, when the paper should not be supplied to the pressing portion 26 at a very high speed, the paper can be supplied to the pressing portion 26 at an appropriate speed not exceeding the upper limit value.

Further, since the control unit 7 controls the paper supply speed to the pressing roller 72 by the supply unit based on the detection result of the pressing roller distance detecting unit, the supply speed is increased according to the distance between the pressing rollers 72. It can be adjusted to an appropriate speed.

Further, the control unit 7 controls the feeding speed of the paper to the pressing roller 72 by the feeding unit so as not to exceed a predetermined upper limit value based on the distance between the pressing rollers detected by the pressing roller distance detecting unit. Therefore, depending on the distance between the pressing rollers 72, when the paper should not be supplied to the pressing portion 26 at a very high speed, the paper can be supplied to the pressing portion 26 at an appropriate speed that does not exceed the upper limit value.

(Example 1)
The paper had a normal thickness, and the adhesive applied to the overlapping surfaces of the paper was the same amount as the amount normally applied, and the paper was not left for a long period of time and had little deterioration. The length of the unit paper in the transport direction was 5.5 inches. The distance between the pair of pressing rollers was set to 5 levels, which is shorter than the normal distance. An AC motor was used as the drive motor of the pressing unit, and the voltage was intentionally lowered by using a transformer, and the power supply was set to 87.5V.

The paper conveying speed at the cutting part corresponding to the supply speed to the pressing part is 71 m / min for the first speed, 60 m / min for the second speed, 50 m / min for the third speed, and 40 m / min for the fourth speed. , The fifth speed was set to 20 m / min. The transport speed of the pressing unit was acquired by the time required for the encoder detector to detect one notch of the encoder of the pressing roller speed detecting unit.

The range of the paper for detecting the transport speed was the entire range for one sheet of unit paper. When the unit paper arrived at the nip of the pressing roller, the detection of the transport speed was started. The transfer speed was detected by the number of notches of the encoder required to transfer 5.5 inches, which is the length of one unit sheet in the transfer direction, by the pressing roller. For the obtained plurality of transport speeds, the average value was calculated for one sheet of unit paper and compared with the threshold value. The first threshold was set to 700 μs, the second threshold was set to 750 μs, the third threshold was set to 800 μs, and the fourth threshold was set to 1000 μs. In addition, the time during which the paper detection unit installed on the pressing unit does not receive the light reflected by the paper and there is no paper at the installation position of the paper detection unit and the amount of rotation of the encoder of the pressing roller speed detection unit. The distance between the front and back papers was measured from. The results are shown in FIG.

In FIG. 4, the horizontal axis is the number of processed sheets of the unit paper. In the first embodiment, 46 sheets of unit paper were processed. The vertical axis on the left side of FIG. 4 indicates the length of the distance between the front and back sheets. The vertical axis on the right side of FIG. 4 shows the average value of the transport speed of the pressing portion for one sheet of unit paper in the time required to detect one pulse of the encoder. The fold lines indicated by black circles in the figure indicate the distance between sheets, and the fold lines indicated by white triangles indicate the average required time. The distance between the first and second sheets of unit paper is not shown because the numerical value is large immediately after the start of processing. Further, the distance between the 45th and 46th sheets is not shown because the numerical value is large due to the deceleration at the end of the process. In the figure, the value of the average required time of the first sheet of unit paper indicated by the white triangle at the left end was 715.2 μs. According to this value, the transport speed of the pressing portion is slower than the first threshold value and higher than the second threshold value.

Therefore, according to the flow of FIG. 2, the paper supply speed was changed from the first speed of 71 m / min to the slower second speed of 60 m / min. In FIG. 4, the transfer speed of the second unit paper was 715.2 μs, which was the same as that of the first sheet, and was between the first threshold value and the second threshold value. Processing continued. After that, until the processing of the 46 sheets of unit paper set as the number of sheets to be processed was completed, the transport speed in the pressing portion was always between the first threshold value and the second threshold value, so that the supply speed to the pressing portion was set to the second speed. I kept it as it was.

The distance between the sheets indicated by the black circles in FIG. 4 sharply shortened from the first sheet (not shown) immediately after the start of the processing to about the tenth sheet of the unit sheet. However, the rate at which the paper-to-paper distance becomes shorter gradually decreases, and for the 10th and subsequent sheets, the paper-to-paper distance remains stable within a range of about 50 mm until the processing of the 45th sheet, which is the penultimate sheet, is completed. It became the state that was done. In this way, it was possible to avoid the occurrence of jam.

(Example 2)
A paper that was thicker than that of Example 1 and was difficult to convey by the pressing roller was used. The thickness of the paper was detected by the paper thickness detection unit. The length of the unit paper in the transport direction was set to 4 inches. The distance between the pair of pressing rollers was set to 9 levels, which was longer than that of the first embodiment, and the user manually input and set the distance from the operation panel. Although the distance between the pressing rollers is longer than that of the first embodiment, the pressure of the pressing rollers is higher in the second embodiment than in the first embodiment because the thickness of the paper is thicker than that of the first embodiment. There is. Therefore, an excessive load may be applied to the pressing roller. An AC motor was used as the drive motor of the pressing portion, and the voltage was intentionally lowered by using a transformer to set it to 90V. The first to fifth speeds and the first to fourth thresholds were the same as in Example 1 above.

The control unit sets the upper limit of the supply speed to 60 m / min by referring to the data table stored in the storage unit. This is consistent with the second speed. While the processing of the unit paper set as the number of sheets to be processed is continued, the supply speed to the pressing portion is controlled so as not to exceed this upper limit value. The result of Example 2 is shown in FIG.

The contents of the horizontal axis of FIG. 5, the scales of the left and right vertical axes, the fold line indicated by the black circle, and the fold line indicated by the white triangle are the same as those of the first embodiment shown in FIG. In the second embodiment, 43 sheets of unit paper were processed. In FIG. 5, the value of the average required time of the first sheet of unit paper indicated by the white triangle at the left end was 866 μs. This value is slower than the third threshold value and is equal to or higher than the fourth threshold value.

Therefore, the control unit proceeds to step 16 without satisfying step 15 of the flow of FIG. 2, and sets the paper supply speed to 40 m / min, which is the fourth speed. This fourth speed is lower than the upper limit value of 60 m / min set based on the detection value of the paper thickness detection unit and the distance between the pressing rollers. Therefore, the control unit permits the change of the paper supply speed to the fourth speed. When the processing of the paper was started, the supply speed to the pressing portion was 60 m / min, but the second and subsequent sheets are changed to the fourth speed and the processing is continued.

In FIG. 5, the transport speed of the second sheet of unit paper was 848.2 μs, which was between the third threshold value and the fourth threshold value as in the first sheet. The processing was continued while maintaining the second speed as the supply speed. After that, until the processing of 43 sheets of unit paper was completed, the transport speed in the pressing portion was not always slower than the fourth threshold value of 1000 μs, so the supply speed to the pressing portion was maintained at the fourth speed.

It is more difficult to transport the paper than in the first embodiment, and the value of the transport speed of the pressing portion fluctuates between 730 μs and 900 μs, and the distance between the papers also varies accordingly. However, no jam was generated, and all the set papers could be processed.

(Comparative Example 1)
In the first embodiment, even when the transport speed of the pressing portion exceeds the threshold value, the feeding speed of the paper to the pressing portion is not changed and is maintained at 71 m / min. The conditions other than the supply speed of the paper to the pressing portion were the same as those in the first embodiment. The results are shown in FIG.

The value of the average required time of the first sheet of unit paper indicated by the white triangle at the left end of FIG. 6 was 741.7 μs. From this value, the transport speed of the pressing portion is slower than the first threshold value and higher than the second threshold value, as in the first embodiment. However, in Comparative Example 1, the paper supply speed to the pressing portion was maintained at 71 m / min, and the process was continued.

In Comparative Example 1, unlike the above-mentioned Example 1, the distance between papers was shortened to about 10 mm at once. The distance between the 10th or 11th sheet in the figure is almost eliminated. It is difficult to check visually, but in this case, there is a possibility that the front and rear papers collide. It is considered that the pressing roller cannot recover the rotational speed, or even if it recovers, it drops sharply immediately after that. By continuing the subsequent processing, the distance between the 15th sheets was eliminated, and the average required time was about twice as long as that of the other preceding sheets.

Due to the configuration of the apparatus, it is difficult to visually check the state of the paper being processed, but it is highly possible that the preceding paper and the succeeding paper are sandwiched at one time. Or, because the trailing paper runs on the leading paper, the leading edge of the trailing paper warps and folds back, and the thickness of the leading edge of the trailing paper may be thicker than when it was normally folded in three. unknown. Alternatively, there is a possibility that an extra polygonal line is formed due to the misalignment of the outer tri-fold, and the thickness of the normal outer tri-fold is 4 or more, which is the thickness of 3 sheets. ..

The control unit generated a jam detection error as the distance between the fifteenth sheets before and after the sheets disappeared, and stopped the processing at this point.

(Comparative Example 2)
In the second embodiment, the feeding speed of the paper to the pressing portion was not changed even when the conveying speed of the pressing portion exceeded the threshold value. The speed of supplying the paper to the pressing portion at the start of the process was 60 m / min in Example 2 above, but was set to 50 m / min, which is slower than this in Comparative Example 2. Other conditions other than these were the same as in Example 2 above. The results are shown in FIG.

The value of the average required time of the first sheet of unit paper indicated by the white triangle at the left end of FIG. 7 was 963.9 μs. From this value, the transport speed of the pressing portion was slower than the third threshold value and equal to or higher than the fourth threshold value, but the paper supply speed to the pressing portion was not changed, maintained at 50 m / min, and the processing was continued. As a result, the distance between the sheets was sharply shortened, a jam occurred at the 12th sheet, and the process was stopped.

The processing apparatus of each of the above embodiments includes a pressing roller speed detecting unit 76, a paper thickness detecting unit 54, and a pressing roller distance detecting unit, and the processing apparatus of the present invention includes at least one of these. All you have to do is prepare one. When only the paper thickness detection unit is provided and neither the pressing roller speed detecting unit nor the pressing roller distance detecting unit is provided, the control unit transfers to the pressing roller by the feeding unit based only on the paper thickness detected by the paper thickness detecting unit. Control the paper supply speed. Then, when the thickness of the paper is thicker than a predetermined threshold value set in advance, the paper supply speed by the supply unit is set to a predetermined speed stored in the storage unit in advance based on the experimental results and the like. On the contrary, when the thickness of the paper is thinner than other predetermined threshold values set in advance, the supply speed by the supply unit is set to a predetermined speed faster than the speed set when the paper is thick. From these, the paper can be appropriately supplied to the pressing roller according to the thickness of the paper.

Further, when the processing apparatus includes only the pressing roller distance detecting unit and neither the pressing roller speed detecting unit nor the paper thickness detecting unit, the control unit is the pressing roller detected by the pressing roller distance detecting unit. The speed at which the paper is supplied to the pressing roller by the supply unit is controlled based only on the distance between the two. When the distance between the pressing rollers is shorter than a predetermined threshold value set in advance, the paper supply speed by the supply unit is set to a predetermined speed stored in the storage unit in advance based on the experimental results and the like. On the contrary, when the distance between the pressing rollers is longer than another predetermined threshold value set in advance, the supply speed by the supply unit is set to be faster than the speed set when the length between the pressing rollers is short. Set to. From these, the paper can be appropriately supplied to the pressing roller according to the distance between the pressing rollers.

The pressing roller speed detection unit 76 includes an encoder 761 and an encoder detector 762, and detects the paper conveying speed from the rotation speeds of the pressing roller and the conveying roller, but if the paper conveying speed by the pressing roller can be detected. , Other configurations are possible, for example, by measuring the time from when the paper detection unit installed in the pressing unit detects the front end of the paper to the detection of the rear end of the paper, the paper is conveyed. The speed may be detected, or the paper transfer speed may be detected from the difference in time when a plurality of paper detection units installed at different positions in the pressing unit in the transport direction detect the front end or the rear edge of the paper, respectively. Further, the paper transport speed may be measured by photographing the amount of movement of the paper in a predetermined time with a CCD camera or the like. Further, although the encoder 761 is installed at one end of the rotating shaft of the transport roller 711, it may be provided at another location such as the rotating shaft of the pressing roller.

Further, the control unit 7 controls to slow down the paper feeding speed to the pressing roller 72 by the feeding unit when the paper conveying speed detected by the pressing roller speed detecting unit 76 is slower than a preset threshold value. However, when the paper transport speed by the pressing roller is slower than the threshold value, the supply of the paper to the pressing roller may be stopped and the processing may be temporarily interrupted. As a result, the processing can be interrupted and the system can be reestablished before the paper jam occurs. If the paper processing is interrupted by detecting an error after the paper is pinched by the pressing roller, the pressing roller is manually rotated forward or backward to press the paper sandwiched at a pressure equal to or higher than the specified value. It is necessary to remove it from the paper, but such trouble can be saved.

Also. The paper thickness detection unit 54 includes a paper thickness detection roller 541 and a paper thickness detector 542, but as another configuration such as using a sensor that measures the distance to the upper surface of the paper and detects the thickness of the paper from this. May be good. Further, the control unit 7 controls the feeding speed of the paper to the pressing roller 72 by the feeding unit based on the thickness of the paper detected by the paper thickness detecting unit 54 so as not to exceed a predetermined upper limit value. The supply speed may be set to a predetermined value according to the thickness of the paper. Further, the control unit 7 controls the feeding speed of the paper to the pressing roller 72 by the feeding unit so as not to exceed a predetermined upper limit value based on the distance between the pressing rollers detected by the pressing roller distance detecting unit. However, the supply speed may be set to a predetermined value based on the distance between the pressing rollers. Further, in the third embodiment, a data table regarding the upper limit value of the supply speed for supplying the paper to the pressing portion 26, which is set based on the values of both the thickness of the paper and the distance between the pressing rollers 72, is stored. However, the upper limit of the supply speed may be set based only on the thickness of the paper, or the upper limit of the supply speed may be set based only on the distance between the pressing rollers. Further, instead of the upper limit value, a plurality of feed rates corresponding to at least one of the thickness of the plurality of types of paper or the distance between the pressing rollers may be stored.

Further, the paper processing device 1 folds the long continuous paper C into three outer folds at the folding portion 11, transports the long continuous paper C at the tractor transport portion 3, and removes the edges E1 and E2 at the edge removing portion 4. The paper may be a sheet of paper having a predetermined length instead of continuous paper. Further, the folding portion 11 may not be provided, and the two sheets of paper may be overlapped and supplied to the pressing roller without folding the paper. The tractor transport unit 3 may not be provided and may be transported to the downstream side by other transport means such as a rubber roller, a metal roller, or a transport belt. The edge removal portion is not provided, and the edge portion does not have to be separated.

The continuous paper C has perforations M1 to M5 formed at predetermined positions, but continuous paper without perforations may be used, and perforations may be formed at positions different from those of the above embodiments. When the paper folding portion is provided, the paper may be folded by other methods such as folding in half, folding inward, and folding in four instead of folding in three.

A paper to which a crimping adhesive to be adhered when pressed with a pressure equal to or higher than a predetermined value is previously applied to the overlapping surface of the continuous paper is used, but the paper to which the adhesive is not applied in advance is used for pressing. Adhesive may be applied prior to the treatment. For example, by providing an adhesive coating portion inside the processing apparatus, the adhesive may be applied to the continuous paper or the unit paper after cutting during transportation. In this case, the paper detection unit may detect the thickness of the paper before the adhesive is applied, or may detect the thickness of the paper after the adhesive is applied. When the amount of adhesive applied is a predetermined amount more than usual and the thickness of the adhesive affects the pressure when pressing the paper by the pressing roller, it depends on the supply unit based on the thickness of the paper after applying the adhesive. It is preferable to control the feeding speed of the paper to the pressing roller.

The paper detection unit 53 of the cutting unit 25 is composed of an optical system detector including a light emitting element installed above the paper transport surface and a light receiving element installed below the paper transport surface. Reflective sensors installed only on either the top or bottom of the surface may be used. Further, the paper detection unit 77 of the pressing unit 26 is composed of a reflection type optical system detector provided with a light emitting element and a light receiving element installed above the paper transport surface, but emits light above and below the transport surface. A transmissive sensor in which the element and the light receiving element are installed at a predetermined distance from each other may be used.

Further, although the paper processing apparatus includes the cutting portion 25, the paper processing apparatus may not include the cutting portion and may have only the pressing portion. In this case, the supply unit is composed of a supply roller, a supply belt, or the like that supplies the paper to the pressing roller. The supply unit is provided in the cutting unit that cuts long continuous paper into unit paper of a predetermined length, but if the paper can be supplied to the pressing roller, other parts such as a printing unit, a folding unit, and a glue coating unit can be used. It may be provided in the mechanism.

D unit paper, C continuous paper, 7 control unit, 25 cutting unit, 54 paper thickness detection unit, 72 pressing roller, 76 pressing roller speed detection unit.

Claims (6)

Detects the thickness of the paper, the pressing roller that presses the paper on which the adhesive is applied to the overlapping surface of the paper with a pressure equal to or higher than a predetermined value, and the supply unit that supplies the paper to the pressing roller. A paper processing device including a paper thickness detecting unit for controlling paper thickness and a control unit for controlling the feeding speed of paper to a pressing roller by the feeding unit based on the paper thickness detected by the paper thickness detecting unit. The paper according to claim 1, wherein the control unit controls the paper supply speed of the paper to the pressing roller by the supply unit based on the paper thickness detected by the paper thickness detection unit so as not to exceed a predetermined upper limit value. Processing equipment. Between a pressing roller that presses and adheres the paper to which the adhesive is applied to the overlapping surfaces of the paper with a pressure equal to or higher than a predetermined value, a supply unit that supplies the paper to the pressing roller, and a pair of pressing rollers. A paper processing device including a pressing roller distance detecting unit that detects the distance between the pressing rollers and a control unit that controls the paper supply speed to the pressing rollers by the supplying unit based on the detection result of the pressing roller distance detecting unit. The control unit controls the feeding speed of the paper to the pressing rollers by the feeding unit based on the distance between the pressing rollers detected by the pressing roller distance detecting unit so as not to exceed a predetermined upper limit value. The paper processing apparatus according to. The paper processing apparatus according to any one of claims 1 to 4, wherein the supply unit is provided in a cutting unit that cuts long continuous paper into unit paper of a predetermined length. The paper processing apparatus according to any one of claims 1 to 5, further comprising an AC motor that rotates a pressing roller at a constant rotation speed.

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