JP6071400B2 - Control method of paper crimping device - Google Patents

Description

  The present invention relates to a method for controlling a sheet crimping apparatus for producing a crimped letter, a crimped postcard, or the like.

FIG. 16 is an example of a pressure-bonding postcard manufacturing apparatus provided with a paper pressure bonding device (Patent Document 1), and from the upstream side of the paper conveyance directions D1 and D2, a paper feeding unit 100, a side-by-side portion 101, a paper folding unit 102, A cutting unit 103 and a crimping unit (paper crimping device) 104 are provided. The sheet S stacked on the sheet feeding unit 100 is coated with a pressure-sensitive adhesive that is bonded at a certain pressure or more, the sheet edges are aligned at the one-sided unit 101, and the sheet folding unit 102 is folded in half. It is folded into three folds, cut at the cutting portion 103, and pressed at the crimping portion 104, thereby producing a sealed postcard in a sealed state.

  The pressure-bonding portion 104 includes a pair of upper and lower pressure-bonding rollers 110 having the same outer diameter. One pressure-bonding roller 110 is connected to a drive motor (not shown), and the other pressure-bonding roller 110 is bonded to the drive side. The roller 110 is connected via a gear mechanism or the like. As a result, the two pressure rollers 110 are synchronously rotated in opposite directions, and the folded paper S is pressure-bonded and sealed.

Japanese Patent Laid-Open No. 2001-213070

With respect to the pair of pressure rollers 110 of the pressure bonding section 104 shown in FIG. 16 , if the pressure rollers 110 are not perfect circles with a perfect circle and no eccentricity, the pressure rollers 110 are rotated at a constant rotational speed. Even if the rotation is synchronized, the peripheral speed of the pressure roller 110 fluctuates during one rotation.

  Although the roundness and eccentricity of the outer peripheral surface of the pressure roller 110 are determined by the processing accuracy at the time of manufacturing the pressure roller 110, an attempt is made to manufacture a pressure roller that has a perfect circle and is not eccentric. If this is the case, it requires a large processing cost and processing effort, and is not realistic. That is, the pressure roller generally used is not a perfect roller.

  As described above, when there is a circumferential speed difference between the pair of pressure rollers 110 due to a change in the circumferential speed during one rotation of the pressure roller 110, the circumferential speed difference can be compressed between the pressure rollers 110. This causes curling of the crimped postcard S. For example, the pressure-bonded postcard S is curved toward the pressure roller side whose peripheral speed is relatively slow. If curls are generated on the pressure-bonded postcard, the quality (product value) of the pressure-bonded postcard itself is not lowered, and it cannot be neatly stacked on the paper receiving portion.

(Object of invention)
An object of the present invention is to provide a control method for a paper crimping apparatus that can suppress curling of a paper such as a crimping postcard due to the roundness or eccentricity of a pressure roller.

In order to solve the above problems, the present invention includes a pair of pressure rollers, a drive unit that rotationally drives both pressure rollers, and a control unit that controls the drive unit. In the control method of the paper crimping apparatus for crimping, the circumferential speed detection sensor measures the circumferential speed of the surface of each pressing roller, and inputs the measured value to the control unit. Comparing the peripheral speeds of the two pressure rollers, if there is a difference between the two peripheral speeds, changing the peripheral speed of at least one of the pressure rollers, the peripheral speed difference becomes zero. The peripheral speed ratio between the pressure rollers is controlled.

In the present invention , preferably, each circumferential speed detection sensor is constituted by a detection roller member that rotates in contact with the surface of each pressure roller. A differential mechanism or a belt-type continuously variable transmission is disposed between the rotating shafts of both the pressure rollers.

According to the present invention , in the processing and assembly of the pressure roller, even if there is a processing error in roundness or it is attached in a state of being eccentric from the rotation axis, the pressure roller can be moved between the pressure rollers during one rotation. It is possible to prevent a difference in peripheral speed from occurring, thereby suppressing the occurrence of curling in a crimped letter or postcard discharged after crimping, and to manufacture a high-quality crimped letter or crimped postcard.

When the peripheral speed of the pressure roller is directly measured and the measured peripheral speed of the pressure roller itself is adjusted as in the present invention , a specific correction amount of the peripheral speed of the pressure roller is easily determined. And easy to control.

  In addition, the peripheral speed can be measured more specifically by measuring the peripheral speed of the outer peripheral surface of each pressure roller with a rotational peripheral speed detection sensor that directly contacts the outer peripheral surface of each pressure roller.

  In particular, if a differential mechanism is disposed between the two pressure rollers and a desired peripheral speed difference is applied by the differential mechanism, the peripheral speed can be corrected in accordance with the detection result.

BRIEF DESCRIPTION OF THE DRAWINGS It is 1st Embodiment of the paper crimping | compression-bonding apparatus which implements 1st invention of this application, and is a perspective view of the crimping postcard manufacturing apparatus containing this paper crimping | compression-bonding apparatus. It is the schematic which expressed each mechanism or apparatus in the crimping postcard manufacturing apparatus of FIG. 1 on the same straight line along the paper conveyance direction. FIG. 2 is a perspective view of the paper crimping apparatus in FIG. 1. It is IV arrow line view of FIG. FIG. 2 is a skeleton diagram showing a power transmission path of the paper crimping apparatus of FIG. 1. It is VI-VI sectional drawing of FIG. It is VII-VII sectional drawing of FIG. It is a block diagram of the control system of 1st Embodiment of 1st invention. It is a perspective view of 2nd Embodiment of the paper crimping | compression-bonding apparatus which implements 1st invention. FIG. 10 is a view on arrow X in FIG. 9. It is a XI arrow line view of FIG. FIG. 10 is an operation explanatory diagram at the time of reference rotation (medium speed) of the paper crimping apparatus of FIG. 9. FIG. 10 is an operation explanatory diagram when adjusting the peripheral speed of the paper crimping apparatus of FIG. 9. It is operation | movement explanatory drawing at the time of the peripheral speed adjustment contrary to FIG. It is a block diagram of the control system of 2nd Embodiment of 1st invention. It is a perspective view of a prior art example.

[First embodiment of the present invention ]
FIG. 1 to FIG. 8 show a pressure-bonded postcard manufacturing apparatus equipped with a paper pressure bonding apparatus (first embodiment) for carrying out the present invention . The structure of the pressure-bonded postcard manufacturing apparatus will be described with reference to these drawings.

  FIG. 1 is a perspective view of the entire crimped postcard manufacturing apparatus, in which a first transport unit 1 having a first transport direction D1 and a second transport direction D2 that is substantially orthogonal to the first transport direction D1. 2 as a whole, and is formed in an L shape in plan view. An operation panel 7 having a control unit 6 is provided on the upper surface of the second transport unit 2, and various control settings of the crimping postcard manufacturing operation, operation start and stop, and the like by a key operation of the operation panel 7. Is entered and displayed.

  A paper feed unit 8 that stacks unprocessed paper (postcard base paper) S and feeds the paper one by one is provided at the transport start end of the first transport unit 1. Is provided with a paper receiving section 9 on which processed paper (completed crimped postcards) are sequentially stacked in an inclined state.

  FIG. 2 is an exploded view of the inside of the crimped postcard manufacturing apparatus of FIG. 1. In the first transport unit 1, a sheet folding mechanism 11 and a slitter 12 are arranged from the upstream side in the first transport direction D 1. Yes. The paper folding mechanism 11 folds the paper S conveyed from the paper supply unit 8 into two or three folds along a fold line perpendicular to the first conveying direction D1, and the slitter 12 folds the folded paper S Is cut along the conveying direction.

  An intermediate transport mechanism 13 and a paper crimping device (paper crimping mechanism) 14 are arranged in the second transport unit 2 from the upstream side in the second transport direction D2. The intermediate transport mechanism 13 receives the paper S discharged from the slitter 12 and transports it in the second transport direction D2. The paper crimping device 14 crimps the folded paper S between the lower first pressure roller 21 and the upper second pressure roller 22 and discharges the paper S to the paper receiver 9. Arrows B1 and A1 indicate the rotation directions of the first pressure roller 21 and the second pressure roller 22, respectively. Both the press rollers 21 and 22 are made of iron, SUS or other metal materials. Preferably, a highly rigid material that can withstand high pressure is used.

  3 is a perspective view of the paper crimping device 14, FIG. 4 is a view taken along arrow IV in FIG. 3, FIG. 5 is a skeleton diagram of a power transmission path of the paper crimping device, and FIGS. 6 and 7 are VI-VI in FIG. VII-VII sectional drawing and FIG. 8 are block diagrams of a control system. In FIG. 4, the first roller shaft 31 of the lower first pressure roller 21 is rotatably supported by the pair of support walls 18, and the second roller shaft of the upper second pressure roller 22. 32 is rotatably supported by a pair of support arms 19. One shaft end portion of the lower first roller shaft 31 is connected to the driving motor 15 for the pressure roller by the belt transmission mechanism 17.

  Between the other shaft end portion (left end portion in FIG. 5) of the first roller shaft 31 and the shaft end portion (left end portion in FIG. 5) of the second roller shaft 32, the first roller shaft 31 is fixed. A drive gear 35, a driven gear 36 that meshes with the drive gear 35 and has the same outer diameter (the same number of teeth) as the drive gear 35, and a driven shaft (cylinder shaft) that rotates integrally with the driven gear 36. 36a and a differential mechanism 16 that connects the driven shaft 36a and the second roller shaft 32 so as to be capable of shifting are provided as a speed change mechanism.

  In FIG. 3, the support arm 19 that supports the second pressure roller 22 is rotatably supported by the support wall 18 via the rotation shaft 20, and the holding pressure adjusting mechanism 25 moves the support arm 19 up and down. The fixing position of the direction can be changed, and thereby the pressure between the pressure rollers can be adjusted.

  5, the differential mechanism 16 includes a first sun gear 61 fixed to the driven shaft 36a of the driven gear 36, a second sun gear 62 fixed to the second pressure roller shaft 32, and a first sun gear. A plurality of first planetary gears 63 meshing with 61, a plurality of second planetary gears 64 meshing with the second sun gear 62, and the first and second planetary gears 63, 64 are rotatable around their axis. And a planet carrier 66 that can rotate about the axis of the second roller shaft 32 as a whole. The first planet gear 63 and the second planet gear 64 are fixed to a common planet gear shaft 63a, and the planet gear shaft 63a is rotatably supported by the planet carrier 66.

  The outer periphery of the planet carrier 66 is connected to a differential drive motor 70 via a belt transmission mechanism 68. The planet carrier 66 is rotatable independently of the driven shaft 36a and the second roller shaft 32.

  FIG. 6 shows the meshing relationship between the first sun gear 61 and the first planetary gear 63. The first planetary gear 63 is arranged on the outer periphery of the first sun gear 61 at three equal intervals in the circumferential direction. Are arranged. In order to increase the speed of the first planetary gear 63 relative to the first sun gear 61, the number of teeth of the first planetary gear 63 is set to be smaller than the number of teeth of the first sun gear 61. In the embodiment, the first sun gear 61 has 32 teeth, and the first planetary gear 63 has 16 teeth. Accordingly, when the first sun gear 61 rotates at a constant rotational speed in the A1 direction while the planetary carrier 66 is stopped, the first planetary gears 63 are arranged around the axis of the first sun gear 61. Rotates (rotates) in the E1 direction at a rotational speed twice that of 61.

  FIG. 7 shows the meshing relationship between the second sun gear 62 and the second planetary gear 64, and the second planetary gear 64 is equidistant from the outer periphery of the second sun gear 62 in the circumferential direction. Three are arranged. The number of teeth of the second planetary gear 64 is the same as the number of teeth of the second sun gear 62. Therefore, when the second planetary gear 64 rotates in the arrow E1 direction at a constant rotational speed, the second sun gear 62 rotates in the arrow A1 direction at the same rotational speed as the second planetary gear 64.

  As for the differential mechanism 16 as a whole, in FIG. 5, when the planetary carrier 66 is stopped, the second sun gear 62 rotates in the same direction (in the direction of arrow A1 in FIG. 7) at twice the rotational speed of the first sun gear 61. ). That is, power is transmitted from the first sun gear 61 to the first planetary gear 63 at a double speed, and from the first planetary gear 63 via the second planetary gear 64 to the second sun gear 62, Since the power is transmitted at a constant speed, the second sun gear 62 finally rotates at a rotational speed twice that of the first sun gear 61.

  When the first sun gear 61 rotates in the arrow A1 direction at a predetermined rotation speed, the planet carrier 66 rotates in the arrow A1 direction (FIG. 6) at the same rotation speed as the first sun gear 61. The planetary gear 63 is stopped relative to the first sun gear 31, and the second sun gear 62 rotates in the direction of the arrow A 1 at the same rotational speed as the first sun gear 61.

  When the planetary carrier 66 rotates in the direction of arrow A1 from the state where the planetary carrier 66 rotates at the same rotational speed as that of the first sun gear 61, the rotational speed of the planetary carrier 66 in the direction of arrow A1 is increased. The rotational speed of the sun gear 61 is reduced. On the contrary, when the planetary carrier 66 is rotated in the direction of arrow A1 at the same rotational speed as that of the first sun gear 61, when the rotational speed of the planetary carrier 66 in the direction of arrow A1 is reduced, the second sun gear 62 is The rotational speed of the first sun gear 61 is increased.

  In FIG. 5, first and second contact roller type peripheral speed detection sensors 41, 42 that are in contact with the outer peripheral surfaces and rotated by the pressure rollers 21, 22 are arranged on the outer peripheral surfaces of the pressure rollers 21, 22. Has been. The first and second peripheral speed detection sensors 41 and 42 are electrically connected to the control unit 6 and continuously measure the peripheral speeds of the outer peripheral surfaces of the corresponding pressure rollers 21 and 22, respectively. 6 is input.

  FIG. 8 is a block diagram of the control system. The drive motor 15 for the pressure roller and the drive motor 70 for the differential mechanism are electrically connected to the control unit 6, and the motor rotation speed is determined by a command from the control unit 6. Is controlled.

  The control unit 6 compares the two peripheral speeds input from the first peripheral speed detection sensor 41 and the second peripheral speed detection sensor 42, and a peripheral speed difference is generated during one rotation of the pressure rollers 21 and 22. If the difference is in the range in which the peripheral speed difference occurs, a control operation signal is sent to the differential mechanism drive motor 70 so that the peripheral speed difference is zero.

  In FIG. 5, the planetary carrier 66 is normally set to rotate in the same direction (arrow A1 direction) at the same rotational speed as that of the first sun gear 61, whereby the second sun gear 62 is The upper pressure roller 22 rotates at the same speed as that of the lower pressure roller 21.

  When the peripheral speed detection sensors 41 and 42 detect that the peripheral speed of the second pressure roller 22 is slower (lower) than the peripheral speed of the first pressure roller 21 in a part of the rotation range. The rotational speed of the planetary carrier 66 in the direction of arrow A1 is reduced so that the rotational speed of the second pressure roller 22 is higher than the rotational speed of the first pressure roller 21. That is, the rotational speed of the planetary carrier 66 in the direction of the arrow A1 is made smaller than the rotational speed of the first sun gear 61, thereby increasing the rotational speed of the second sun gear 62 and increasing the rotational speed in the partial rotational range. The peripheral speed of the second pressure roller 22 is increased to match the peripheral speed of the first pressure roller 21.

  On the contrary, when the peripheral speed of the second pressure roller 22 is faster (higher) than the peripheral speed of the first pressure roller 21 in a part of the rotation range by the peripheral speed detection sensors 41 and 42, The rotational speed of the planetary carrier 66 in the arrow A1 direction is increased so that the rotational speed of the second pressure roller 22 is lower than the rotational speed of the first pressure roller 21. That is, the rotational speed of the planetary carrier 66 in the direction of the arrow A1 is made larger than the rotational speed of the first sun gear 61, whereby the rotational speed of the second sun gear 62 is reduced, and the second rotational speed in the partial rotational range is reduced. The peripheral speed of the pressure roller 22 is reduced to coincide with the peripheral speed of the first pressure roller 21.

  Of course, the peripheral speed difference is not limited to the case where the peripheral speed difference occurs in a partial range during one rotation, but also when the peripheral speed difference occurs due to an error in the outer diameters of the pressure rollers 21 and 22. Accordingly, the differential mechanism 16 operates to control the rotation speed of the second roller shaft 31.

[Crimp postcard manufacturing work]
A brief description of the work to produce a crimped postcard. In FIG. 1, unprocessed sheets of pressure-bonded postcards S are stacked on the sheet feeding unit 8, and these sheets S are supplied one by one into the first transport unit 1 by a sheet feeding mechanism. The A pressure sensitive adhesive that is bonded to the sheet S by applying a certain pressure or more is applied to a predetermined location.

  In FIG. 2, a sheet S conveyed in the first conveyance unit 1 in the first conveyance direction D1 is folded in the sheet folding mechanism 11 along a fold line in a direction perpendicular to the first conveyance direction D1. Alternatively, the sheet is folded in three and then cut along the transport direction by the slitter 12 and supplied to the second transport unit 2.

  In the second transport unit 2, the folded sheet S is transported in the second transport direction D 2 by the intermediate transport mechanism 13, and sealed by being crimped by the upper and lower press rollers 21, 22 in the sheet press unit 14. And discharged to the paper receiving portion 9.

  During the test operation before the manufacturing operation, the peripheral speed between the press rollers 21 and 22 is adjusted in the paper press device 14. For example, during the test operation, the rotational speed of the planetary carrier 66 in the direction of arrow A 1 is set to the same speed as that of the first sun gear 61. During this trial operation, if there is a difference in the peripheral speed during one rotation of the pressure-bonding rollers 21 and 22 detected by the both peripheral speed detection sensors 41 and 42, the controller 6 generates the peripheral speed. The rotational speed of the planetary carrier 66 in the arrow A1 direction is controlled so that the peripheral speed difference becomes 0 in the range. This control content is stored in the control unit 6, and in the subsequent operations, the rotational speed of the planetary carrier 66 in the direction of arrow A1 is controlled based on the stored control content. As a result, the peripheral speed difference between the pressure rollers 21 and 22 is corrected, and the curling phenomenon of the pressure-bonded postcard in the pressure-bonding device 14 is suppressed.

  Of course, both the peripheral speed detection sensors 41 and 42 continuously detect the peripheral speeds of the outer peripheral surfaces of the pressure-bonding rollers 21 and 22 and input them to the control unit 6 even after the actual work is started. Even when there is a difference between the peripheral speeds during the work, the control unit 6 controls the rotational speed of the planetary carrier 66 so that the peripheral speed difference is zero, and controls the gear ratio of the differential mechanism 16. To do.

  In the present embodiment, the setting of the gear ratio of the differential mechanism 16 is merely an example. When the second sun gear 62 and the second planetary gear 64 are set to the same number of teeth, the first gear ratio is set. By changing the gear ratio of the first planetary gear 63 with respect to the sun gear 61, the rate of change in the speed increase of the second sun gear 62 with respect to the increase in the rotational speed of the planetary carrier 66 can be changed. For example, by making the gear ratio of the first sun gear 61 and the first planetary gear 63 close to 1, the rate of change in the speed increase of the second sun gear 62 can be lowered.

  It is also possible to adopt a configuration in which the number of teeth of the second planetary gear is made larger than the number of teeth of the first sun gear and transmitted to the second planetary gear in a decelerated state.

  Further, normally, the planetary carrier 66 is used in a stopped state, and the planetary carrier 66 is rotated only when a circumferential speed difference is generated between the pressure rollers 21 and 22, thereby eliminating the circumferential speed difference. You can also. For example, when the gears 61, 62, 63, 64 of the differential mechanism 16 are set to the same gear ratio as in FIGS. 6 and 7 and the planetary carrier 66 is stopped, the first sun gear 61 is On the other hand, in the configuration in which the second sun gear 62 is doubled, the gear ratio between the drive gear 35 and the driven gear 36 can be set to 1: 2 so as to cancel this speed increase. For example, it can be set to 34 teeth and 68 teeth.

  In this case, the planetary carrier 66 is rotated in the direction of the arrow A1 from the stopped state, whereby the rotational speed of the second sun gear 62 is reduced and the rotational speed of the second pressure roller 22 is rotated by the rotation of the first pressure roller 21. It can be lower than the speed. On the contrary, by rotating the planetary carrier 66 from the stopped state in the direction opposite to the arrow A1, the rotation speed of the second sun gear 62 is increased, and the rotation speed of the second pressure roller 22 is increased. The rotation speed can be higher than 21.

  In short, the drive gear 35 and the driven gear 36 are set to have different diameters so that the driven gear 36 is accelerated or decelerated with respect to the drive gear 35 and the acceleration or deceleration is canceled out with respect to the first sun gear 61. Thus, the number of teeth of each gear 61, 62, 63, 64 of the differential mechanism 16 is set so that the second sun gear 62 is decelerated or accelerated. Thus, normally, by stopping the planet carrier 66, the first pressure roller 21 and the second pressure roller 22 can be rotated at the same rotational speed, and during the paper processing operation, the first pressure roller 21 and the second pressure roller 22 can be rotated. The planetary carrier 66 only needs to be rotated only when a circumferential speed difference occurs between the pressure roller 21 and the second pressure roller 22, and energy and noise for driving the drive motor 70 can be reduced. it can.

[Effect of the embodiment]
(1) during machining or assembly of the pressure rollers 21 and 22, be attached in a state of error Ah is, or decentered in roundness, the peripheral speed difference between the two pressure rollers 21 and 22 becomes 0 As described above, since the transmission ratio by the differential mechanism 16 is controlled, it is possible to prevent a peripheral speed difference from being generated during one rotation between the pressure rollers 21 and 22 and to prevent curling in the pressure-bonded postcard that is folded and discharged. It is possible to produce a high-quality crimped postcard.

(2) Since the peripheral speed detection sensors 41 and 42 directly measure the peripheral speeds of the outer peripheral surfaces of the press rollers 21 and 22 and adjust the measured peripheral speeds of the press rollers 21 and 22 themselves. When the curl is generated, the correction amount of the circumferential speed of the pressure rollers 21 and 22 can be easily determined, and the control is simple.

(3) Since the peripheral speeds of the outer peripheral surfaces of the pressure rollers 21 and 22 are measured by the roller-type peripheral speed detection sensors 41 and 42 that are in contact with the outer peripheral surfaces of the pressure rollers 21 and 22, the peripheral speed is specifically Can be measured.

(4) The rotational speed of the second pressure roller 22 is controlled by the differential mechanism 16 using the planetary gear, and as a result, the peripheral speed is controlled. Can be controlled.

[Second Embodiment of the Present Invention ]
FIGS. 9 to 18 show a second embodiment of the present invention , in which a V-belt continuously variable transmission 30 is used as a speed change mechanism. 9 is a perspective view of the paper crimping device 14, FIG. 10 is a view taken in the direction of the arrow X in FIG. 9, FIG. 11 is a view taken in the direction of the arrow XI in FIG. FIG. 15 is a block diagram of the control system. The same parts as those in the first embodiment are denoted by the same reference numerals.

  In FIG. 11, the V-belt type continuously variable transmission 30 is provided integrally with a first roller shaft 31 and a pulley drive shaft 33 provided coaxially and integrally with a second roller shaft 32. A pulley driven shaft 34, a driving pulley 35 provided on the pulley driving shaft 33, a driven pulley 36 provided on the pulley driven shaft 34, a reversing pulley 37, and the pulleys 35, 36, 37. And a double-sided V-belt 39 wound around. The double-sided V-belt 39 has a V-shaped cross section on both the inside and outside.

  The driving pulley 35 and the driven pulley 36 are each composed of a pair of movable sheaves whose axial distances can be changed, and are provided with speed change driving actuators 35a and 36a. By changing the distance between each sheave by each actuator 35a, 36, the effective winding radius of each pulley 35, 36 is changed, and the gear ratio between the pulley drive shaft 33 and the pulley driven shaft 34, that is, both roller shafts. The gear ratio between 31 and 32 is changed.

  As shown in FIG. 12, when the effective winding radii of the pulleys 35 and 36 are equal, the pulley drive shaft 33 and the pulley driven shaft 34 rotate at a constant speed, and as shown in FIG. When the hanging radius is smaller than the effective winding radius of the driven pulley 36, the rotational speed of the pulley drive shaft 33 is decelerated and transmitted to the pulley driven shaft 34. On the contrary, as shown in FIG. 14, when the effective winding radius of the driving pulley 35 is larger than the effective winding radius of the driven pulley 36, the rotational speed of the pulley driving shaft 33 is increased and is applied to the pulley driven shaft 34. Communicated.

  The actuators 35a and 36a are electrically connected to the control unit 6, and according to a command from the control unit 6, the distance between the movable sheaves of the pulleys 35 and 36 is set so that a predetermined reduction ratio (or speed increase ratio) is obtained. Adjust.

  Similar to the first embodiment, the outer peripheral surfaces of the pressure rollers 21 and 22 are in contact with the outer peripheral surfaces and are rotated by the pressure rollers 21 and 22 and the first and second contact roller type peripheral speeds. Detection sensors 41 and 42 are arranged.

FIG. 10 shows a state in which the V-belt 39 is wound. The V-belt 39 is stretched from the driving pulley 35 to the driven pulley 36 in a cross shape so that the inner and outer surfaces are reversed. By passing the intermediate pulley 37 for reversal from 36, the inner and outer surfaces are reversed again (returned to the original) and returned to the driving pulley 35. As a result, the driving pulley 35 and the driven pulley 36 rotate in the A0 and A1 directions, respectively , and convey the nipped paper in the second conveying direction D2 while crimping.

  In FIG. 15, the control unit 6 compares the two peripheral speeds input from the first peripheral speed detection sensor 41 and the second peripheral speed detection sensor 42, and the peripheral speed during one rotation of both the pressure rollers 21 and 22. If there is a difference, a control operation signal is sent to each of the actuators 35a, 36a of the V-belt type continuously variable transmission 30 so that the difference in the peripheral speed is zero in the range where the peripheral speed difference occurs. . For example, when the peripheral speed of the first pressure roller 21 is slower (lower) than the peripheral speed of the second pressure roller 22 in a part of the rotation range, the first pressure roller as shown in FIG. The gear ratio of the V-belt type continuously variable transmission 30 is controlled so that the rotational speed of 21 is higher than the rotational speed of the second pressure roller 22. On the other hand, when the peripheral speed of the first pressure roller 21 is faster (higher) than the peripheral speed of the second pressure roller 22 in a part of the rotation range, the first pressure roller as shown in FIG. The V-belt continuously variable transmission 30 is controlled so that the rotation speed of the roller 21 is lower than the rotation speed of the second pressure roller 22. Of course, the peripheral speed difference is not limited to the case where the peripheral speed difference occurs in a partial range during one rotation, but also when the peripheral speed difference occurs due to an error in the outer diameters of the pressure rollers 21 and 22. Accordingly, the transmission ratio of the V-belt type continuously variable transmission 30 is changed.

  The crimping postcard manufacturing operation is the same as in the first embodiment.

  During the test operation before the manufacturing operation, the peripheral speed between the press rollers 21 and 22 is adjusted in the paper press device 14. For example, when there is a difference in the peripheral speed during one rotation of the pressure-bonding rollers 21 and 22 detected by the both peripheral speed detection sensors 41 and 42 during the test operation, the controller 6 determines that the peripheral speed difference Actuators 35a and 36a are operated so that becomes zero, and the gear ratio of the V-belt continuously variable transmission 30 is controlled. This control content is stored in the control unit 6, and in subsequent operations, the gear ratio of the V-belt type continuously variable transmission 30 is controlled based on the stored control content. Thereby, the curling phenomenon of the crimping postcard in the crimping device 14 is suppressed.

  Of course, both the peripheral speed detection sensors 41 and 42 continuously detect the peripheral speeds of the outer peripheral surfaces of the pressure-bonding rollers 21 and 22 and input them to the control unit 6 even after the actual work is started. Even when there is a difference between the two peripheral speeds during the work, the control unit 6 operates the actuator 16a so that the peripheral speed difference becomes zero, and controls the gear ratio of the V-belt continuously variable transmission 30. .

[Effect of the embodiment]
(1) during machining or assembly of the pressure rollers 21 and 22, be attached in a state of error Ah is, or decentered in roundness, the peripheral speed difference between the two pressure rollers 21 and 22 becomes 0 As described above, the transmission ratio of the V-belt type continuously variable transmission 30 is automatically adjusted, so that it is possible to prevent a difference in peripheral speed during one rotation between the pressure-bonding rollers 21 and 22 and to produce a pressure-bonded postcard that is folded and discharged. It is possible to suppress the occurrence of curling and to produce a high-quality crimped postcard.

(2) Since the peripheral speed detection sensors 41 and 42 directly measure the peripheral speeds of the outer peripheral surfaces of the press rollers 21 and 22 and adjust the measured peripheral speeds of the press rollers 21 and 22 themselves. When the curl is generated, the correction amount of the circumferential speed of the pressure rollers 21 and 22 can be easily determined, and the control is simple.

  Since the peripheral speeds of the outer peripheral surfaces of the press rollers 21 and 22 are measured by the roller-type peripheral speed detection sensors 41 and 42 that contact the outer peripheral surfaces of the press rollers 21 and 22, the peripheral speed can be specifically measured. .

[Other embodiments]
(1) The paper crimping apparatus in which the control method of the present invention is implemented is not limited to the paper crimping apparatus used in the crimping postcard manufacturing apparatus as shown in FIG. 1 and FIG. Is also included.

(2) In the present invention , the mechanism for changing the peripheral speed ratio between the pressure rollers is not limited to a differential mechanism or a V-belt continuously variable transmission.

(3) In the present invention , when it is not necessary to apply a high pressure as the pressure roller, it is possible to use a roller having lower rigidity than that of metal. In addition, it is preferable from the viewpoint of curling suppression that the outer diameters of both the pressure rollers are equal, but it is necessary to control the peripheral speed or use pressure rollers of different diameters depending on other conditions. Is also possible.

6 Control unit 14 Paper crimping device 15 Drive motor
16 Differential mechanism 21 First pressure roller 22 Second pressure roller 30 V-belt continuously variable transmission (one component of drive unit)
41 and 42 laps speed detection sensor

Claims (4)

In a control method of a paper press bonding apparatus, comprising: a pair of press rollers, a drive unit that rotationally drives both press rollers, and a control unit that controls the drive unit, and presses the paper between the rotating press rollers.
The peripheral speed detection sensor measures the peripheral speed of the surface of each pressure roller, and inputs the measured value to the controller.
The control unit compares the input peripheral speeds of the two pressure rollers, and when there is a difference between the two peripheral speeds, the control unit changes the peripheral speed of at least one of the pressure rollers, thereby changing the peripheral speed. A method for controlling a sheet pressure bonding apparatus, wherein a peripheral speed ratio between the pressure-bonding rollers is controlled so that a difference becomes zero. In the control method of the paper press bonding apparatus according to claim 1,
Each circumferential speed detection sensor is a control method of a sheet pressurizing device which comprises a detection roller member which rotates in contact with the surface of each pressurization roller. In the control method of the paper press bonding apparatus according to claim 1 or 2,
A method for controlling a sheet press-bonding apparatus, wherein the rotation shafts of the two press-bonding rollers are connected to each other through a differential mechanism so as to be capable of shifting. In the control method of the paper press bonding apparatus according to claim 1 or 2,
A method for controlling a sheet crimping apparatus, wherein the rotation shafts of both the crimping rollers are connected to each other through a belt-type continuously variable transmission so as to be capable of shifting.

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