JP6415993B2 - Cardboard sheet feeding device - Google Patents

Description

  The present invention relates to a corrugated sheet feeding apparatus that feeds laminated corrugated sheets one by one. Specifically, it has a drive motor that is rotationally driven to raise and lower the elevating member with respect to the paper feed roller that feeds the cardboard sheet, and changes the elevating speed control pattern of the drive motor according to the sheet length of the cardboard sheet The present invention relates to a corrugated sheet feeding apparatus.

  Conventionally, various devices for controlling the lifting movement of the lifting member with respect to the paper feed roller have been proposed. For example, a sheet-like workpiece feeding device described in Patent Document 1 includes a lifter that can be raised and lowered with respect to a paper feed roller, a servo motor, and a crank mechanism that converts the rotational movement of the servo motor into the lifting movement of the lifter; A control circuit. The crank mechanism includes a crankshaft coupled to the rotation shaft of the servo motor, a plurality of cranks, and a crank rod. The lifter is connected to the crank rod, and the crank rod is connected to the crankshaft via a plurality of cranks. The control circuit controls the rotation of the servo motor.

Japanese Patent No. 5081703

  In the delivery device described in Patent Document 1, it is considered that the control circuit rotates the servo motor in both forward and reverse directions in order to move the lifter up and down. Specifically, in order to lower the lifter relative to the paper feed roller so that the corrugated cardboard sheet is fed, the servo motor is rotated by a predetermined amount of rotation in the forward direction. On the other hand, in order to raise the lifter with respect to the paper feed roller so as to stop the feeding of the cardboard sheet, the servo motor is rotated by a predetermined rotation amount in the reverse direction. The control circuit switches the rotation direction of the servo motor to both forward and reverse directions and feeds the corrugated cardboard sheets sequentially, and repeats the switching of the rotation direction.

  In the delivery device described in Patent Document 1, the rotation direction of the servo motor is switched between the forward and reverse directions for one lift movement of the lifter. In each of the forward and reverse rotation directions, the servo motor is rotated by a predetermined amount of rotation by performing a series of operations of acceleration, deceleration, and stop. However, since the crank mechanism having a relatively large inertia is connected to the rotation shaft of the servo motor, it is not easy to accurately rotate the servo motor by a predetermined rotation amount in each rotation direction. In particular, the higher the cardboard sheet feeding speed, the more difficult it is to accurately rotate the servomotor by a specified amount at a specified timing in each rotation direction. There is a risk that it cannot be done.

  Therefore, the present invention has been made in view of the above circumstances, and is provided with a motion conversion mechanism that converts rotation in one direction of a drive motor into motion for moving the lifting member up and down, and the sheet length of the corrugated cardboard sheet. Accordingly, it is an object of the present invention to provide a corrugated board sheet feeding device capable of feeding a corrugated board sheet with high accuracy by changing the elevation speed control pattern of the drive motor according to the above.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of paper feed rollers rotatable to feed a lowermost corrugated cardboard sheet of a plurality of laminated cardboard sheets, and a plurality of paper feed rollers are provided. An elevating member that can be raised and lowered with respect to the paper roller, a drive motor, a motion conversion mechanism that converts rotation in one direction of the drive motor into a motion for raising and lowering the elevating member, and transmitting the motion to the elevating member; A lifting control unit that performs variable speed control of rotation of the drive motor in one direction according to the lifting speed control pattern, and the lifting control unit changes the lifting speed control pattern according to the sheet length of the cardboard sheet in the feeding direction. It is the structure to do.

  In the aspect of the present invention, the number of drive motors may be one or plural.

  In the aspect of the present invention, the motion conversion mechanism may have any configuration as long as the rotation of the drive motor in one direction is converted into a motion for moving the lifting member up and down. For example, the motion conversion mechanism may include a crankshaft connected to the drive motor, and a connecting rod that connects the crankshaft and the elevating member. Alternatively, the motion conversion mechanism may be an eccentric member that is coupled to the drive motor and includes an eccentric member that engages with the lower surface of the elevating member.

  In the aspect of the present invention, the motion conversion mechanism is not limited to a configuration that converts one rotation of the rotation shaft of the drive motor into one lifting motion of the lifting member. For example, even if the rotation of the rotation shaft of the drive motor is converted into a single lifting motion of the lifting member, the single rotation of the rotation shaft of the driving motor is lifted multiple times by the lifting member. The structure which converts into a motion may be sufficient.

  In the aspect of the present invention, the lifting control unit is configured to calculate a lifting speed control pattern based on the sheet length, even if it stores a plurality of lifting speed control patterns prepared in advance according to the sheet length. There may be.

  In the aspect of the present invention, the configuration in which the plurality of paper feed rollers are rotationally driven may be any configuration as long as the lowermost corrugated cardboard sheet can be fed. For example, a configuration may be adopted in which a plurality of paper feed rollers are continuously rotated at a predetermined rotation speed while one processing order is being executed. However, in order to accurately feed the lowermost corrugated cardboard sheet, it is preferable to control the rotation and stop of the plurality of paper feed rollers in accordance with the lifting movement of the lifting member for each processing cycle of the corrugated cardboard sheet.

  According to a specific aspect of the present invention, the elevation control unit calculates the elevation speed control pattern based on the sheet length of the corrugated cardboard sheet in the feeding direction and the feeding speed.

  In this specific aspect, the lifting control unit considers other factors such as the usage period of the lifting member in consideration of the wear of the sheet contact surface of the lifting member in addition to the sheet length and feeding speed. The structure which calculates a control pattern may be sufficient.

  According to a specific aspect of the present invention, the elevating speed control pattern defined for causing the elevating member to perform one elevating motion is the rotation of the drive motor to position the elevating member below the plurality of paper feed rollers. A lower control area for controlling the movement, a raising and lowering variable speed area including acceleration and deceleration of the drive motor to raise the elevating member located below the plurality of paper feeding rollers, and an elevating member above the plurality of paper feeding rollers. An upper control region for controlling the rotation of the drive motor for positioning, and a lowering variable speed region including acceleration and deceleration of the drive motor for lowering the lifting member positioned above the plurality of paper feed rollers.

  In this specific embodiment, the configuration for controlling the rotation of the drive motor in the lower control region and the upper control region is a configuration for rotating the drive motor at a low speed even when the rotation of the drive motor is stopped. Also good.

  According to a specific aspect of the present invention, the elevating control unit is configured so that the longer the sheet length of the corrugated cardboard sheet in the feeding direction, the longer the period of the lower control area and the shorter the period of the upper control area. The time interval between the ascending variable speed region and the descending variable speed region is changed according to the length.

  In this specific embodiment, the longer the sheet length of the corrugated board sheet in the feeding direction, the longer the period of the lower control area and the shorter the period of the upper control area. The period of the variable speed region may be changed according to the sheet length of the cardboard sheet, or may be constant regardless of the sheet length of the cardboard sheet.

  According to a specific aspect of the present invention, the corrugated sheet feeding device operates in synchronization with a roller motor that rotates a plurality of paper feed rollers and variable speed control by the lift control unit, and the roller according to the roller speed control pattern A roller control unit that controls the rotation of the motor at a variable speed, and the roller control unit changes the roller speed control pattern according to the maximum sheet length of the corrugated cardboard sheet that can be fed in the feeding direction and the feeding speed. A roller speed control pattern determined to feed one cardboard sheet to a plurality of paper feed rollers includes a stop area where rotation of the roller motor is stopped, and a predetermined rotation speed corresponding to the feed speed from the stopped state. An acceleration region for accelerating the roller motor until a constant speed region for rotating the roller motor at a predetermined rotational speed, and a roller from the predetermined rotational speed to a stop state. Including a deceleration region for decelerating over data, the.

  In this specific aspect, the plurality of paper feed rollers are provided corresponding to a plurality of divided roller sets, even if they are configured to be rotated by a single roller motor via a power transmission mechanism such as a gear train. Alternatively, a configuration in which the rollers are rotated synchronously by a plurality of roller motors may be used.

  In this specific aspect, the roller control unit may change the roller speed control pattern in consideration of other factors such as the paper quality of the cardboard sheet in addition to the maximum sheet length and the feeding speed. .

  In this specific embodiment, the roller control unit is configured to store the plurality of roller speed control patterns prepared in advance according to the maximum sheet length and the feeding speed, even if the configuration is such that the maximum sheet length and the feeding speed are stored. The configuration may be such that the roller speed control pattern is calculated based on this.

  In this specific aspect, the magnitude relationship between the acceleration at which the rotation of the roller motor is accelerated in the acceleration region of the roller speed control pattern and the acceleration at which the rotation of the roller motor is decelerated in the deceleration region of the roller speed control pattern is: It is not limited. For example, the acceleration at which the rotation of the roller motor is accelerated in the acceleration region may be the same as the acceleration at which the rotation of the roller motor is decelerated in the deceleration region, or may be set smaller than the deceleration to be decelerated.

  According to a specific aspect of the present invention, the elevating control unit and the roller control unit are configured such that the lower control area of the elevating speed control pattern overlaps the acceleration area and the constant speed area of the roller speed control pattern at the control timing, and the elevating speed control pattern The up / down speed control pattern and the roller speed control pattern are determined so that the upper control area and the deceleration area of the roller speed control pattern overlap at the control timing, and the rotation of the roller motor is accelerated in the acceleration area of the roller speed control pattern. The acceleration is set larger than the acceleration at which the rotation of the roller motor is decelerated in the deceleration region of the roller speed control pattern.

  According to a specific aspect of the present invention, the elevating control unit stops the rotation of the drive motor in order to hold the elevating member at a lower position below the plurality of paper feed rollers in the lower control region of the elevating speed control pattern. In the upper control area of the lifting speed control pattern, the rotation of the drive motor is stopped in order to hold the lifting member at the upper position above the plurality of paper feed rollers, and the roller control unit moves the lifting member from the lower position to the upper position. The constant speed area of the roller speed control pattern continues until the point when the lowermost corrugated cardboard sheet is separated from the plurality of paper feed rollers when the upward speed is increased, and the constant speed area depends on the maximum sheet length. The roller speed control pattern is determined so as to end before the end of the ascending / descending speed control pattern rising variable speed region.

  In this specific aspect, the constant speed region of the roller speed control pattern continues until the lowermost corrugated cardboard sheet is separated from the plurality of paper feed rollers when the elevating member rises from the lower position toward the upper position. Also, if the lift speed control pattern determined according to the maximum sheet length ends before the end of the variable speed range, the lift speed control pattern determined according to a sheet length smaller than the maximum sheet length can be increased. The roller speed control pattern may be determined so as to continue even after the end of the speed change region.

  According to a specific aspect of the present invention, the motion conversion mechanism includes a drive shaft that transmits rotation in one direction of the lift drive motor and performs one rotation during one lift motion of the lift member, and the drive shaft. An eccentric member that is eccentrically formed from the shaft center and is fixed to the drive shaft, a support mechanism that supports the elevating member so as to be movable up and down, a connection shaft that is connected to the support mechanism, and an eccentric member that is fixed to the connection shaft, A swinging member that engages and swings about the connecting shaft, and the lifting member performs a lifting and lowering motion in accordance with two opposite rotations of the connecting shaft accompanying the swinging motion of the swinging member.

  In this specific aspect, even if the drive shaft is directly connected to the rotary shaft of the lift drive motor, the drive shaft is connected to the rotary shaft of the lift drive motor via a transmission mechanism such as a gear train. May be.

  In a specific aspect according to claim 9, the cardboard sheet feeding device includes a detection unit that detects the rotational position of the drive shaft and generates a position detection signal, and the elevation control unit receives the position detection signal from the detection unit. In synchronism with this, the rotation of the drive motor in one direction is controlled at a variable speed.

  In this specific aspect, the configuration of the detection unit is not limited as long as the detection unit is configured to detect the rotational position serving as the reference of the drive shaft. For example, the detection unit may have a function of detecting the rotation amount of the drive shaft or the rotation speed of the drive shaft in addition to the rotation position serving as the reference of the drive shaft.

  In the first aspect of the present invention, the lift control unit performs variable speed control of the rotation of the drive motor in one direction according to the lift speed control pattern. Further, the elevation control unit changes the elevation speed control pattern according to the sheet length of the cardboard sheet in the feeding direction. As a result, each corrugated sheet is fed with higher accuracy than the conventional configuration in which the drive motor is rotated by a predetermined amount of rotation by performing a series of operations of acceleration, deceleration and stop in both the forward and reverse rotation directions. can do.

  In a specific aspect of the present invention, the elevation control unit calculates the elevation speed control pattern based on the sheet length of the corrugated cardboard sheet in the feeding direction and the feeding speed. As a result, an optimum lifting speed control pattern can be generated according to the change in the sheet length or the feeding speed, and each cardboard sheet can be fed with higher accuracy.

  In a specific aspect according to claim 3, the ascending / descending speed control pattern includes a lower control area and an upper control area for controlling the rotation of the drive motor to position the elevating member below and above the plurality of paper feed rollers, An ascending and descending variable speed region including acceleration and deceleration of the drive motor for raising and lowering the elevating member is included. As a result, by controlling the rotation of the drive motor in one direction in the four regions of the lifting speed control pattern, it is possible to easily and accurately change the lifting motion of the lifting member.

  In a specific aspect according to claim 4, the elevation control unit, as the sheet length of the cardboard sheet in the feeding direction becomes longer, the period of the lower control area becomes longer and the period of the upper control area becomes shorter. The time interval between the ascending variable speed region and the descending variable speed region is changed according to the seat length. As a result, as compared with the conventional configuration that adjusts the position of the mechanical elements such as the lifting control cam, the lifting and lowering motion of the lifting member according to the seat length is changed by changing the period of the lower control area and the period of the upper control area Can be easily and accurately performed.

  According to a specific aspect of the present invention, the roller control unit changes the roller speed control pattern according to the maximum sheet length of the corrugated cardboard sheet that can be fed in the feeding direction and the feeding speed. As a result, the optimum roller speed control pattern can be changed according to the change in the maximum sheet length or the feeding speed, and each cardboard sheet can be fed with higher accuracy. The roller speed control pattern includes a stop area for stopping the rotation of the roller motor, an acceleration area for accelerating the roller motor from a stopped state to a predetermined rotation speed corresponding to the feeding speed, and a roller motor at a predetermined rotation speed. A constant speed region for rotation and a deceleration region for decelerating the roller motor from a predetermined rotation speed to a stop state are included. As a result, by controlling the rotation of the roller motor in the four regions of the roller speed control pattern, it is easy to change the rotation operation of the plurality of paper feed rollers in accordance with the change in the maximum sheet length or the feeding speed. And can be performed accurately.

  7. The specific aspect of claim 6, wherein the acceleration at which the rotation of the roller motor is accelerated in the acceleration region of the roller speed control pattern is set to be greater than the acceleration at which the rotation of the roller motor is decelerated in the deceleration region of the roller speed control pattern. Is done. As a result, the maximum sheet length that can be fed by the plurality of paper feed rollers can be increased as compared with the case where the acceleration to be accelerated is set smaller than the acceleration to be decelerated.

  The roller control unit according to claim 7, wherein the roller control unit controls the roller speed until the lowermost corrugated cardboard sheet is separated from the plurality of paper feed rollers when the elevating member rises from the lower position toward the upper position. The roller speed control pattern is determined so that the constant speed area of the control pattern continues, and the constant speed area ends before the end of the ascending variable speed area of the lifting speed control pattern determined according to the maximum sheet length. . As a result, it is possible to lengthen the period of the constant speed region while ensuring the necessary period of the deceleration region of the roller speed control pattern, and it is possible to reliably feed a relatively long cardboard sheet.

  9. A specific mode according to claim 8, wherein the motion conversion mechanism is configured to transmit a rotation in one direction of the lifting drive motor, and to drive the drive shaft that performs one rotation during one lifting motion of the lifting member; An eccentric member formed eccentrically from the axis of the shaft and fixed to the drive shaft, a support mechanism that supports the elevating member to be movable up and down, a connection shaft connected to the support mechanism, and an eccentric member fixed to the connection shaft A swinging member that engages with the swinging shaft and swings about the connecting shaft, and the lifting member moves up and down in accordance with the two opposite rotations of the connecting shaft accompanying the swinging motion of the swinging member. . As a result, the motion conversion mechanism converts the one-way rotation of the lifting drive motor into two opposite rotations of the connecting shaft, so that the lifting member can perform a smooth lifting motion.

  In a specific aspect of the present invention, the elevation control unit performs variable speed control of the rotation of the drive motor in one direction in synchronization with the position detection signal from the detection unit. As a result, it is possible to cause the elevating member to accurately move up and down following the rotational position of the drive shaft.

1 is a front view showing an overall configuration of a corrugated cardboard box making machine 1 including a corrugated cardboard sheet feeding device 2 according to an embodiment of the present invention. It is the top view which looked at the internal structure below the table 20 of the cardboard sheet feeding apparatus 2 from above. FIG. 3 is an enlarged cross-sectional view of the corrugated board sheet feeding device 2 cut along the line AA shown in FIG. 3 is a drawing schematically showing a connection relationship between a support mechanism 142 and a swing mechanism 143 of the corrugated board sheet feeding device 2. 6 is a view showing a state in which the swing angle of the swing member 172 changes as the eccentric member 171 of the swing mechanism 143 rotates. 1 is a block diagram showing an electrical configuration of a corrugated cardboard box making machine 1. FIG. It is drawing which shows an example of basic roller pattern BRP. It is drawing which shows an example of basic raising / lowering pattern BGP1 according to minimum sheet | seat length, and curve CA1 which shows the change of rotation angle (theta) g of the raising / lowering drive shaft 170. FIG. It is drawing which shows an example of basic raising / lowering pattern BGP1 according to minimum sheet | seat length, and curve CH1 which shows the change of the height Hg of the upper surface of the grating 141. FIG. It is drawing which shows an example of basic raising / lowering pattern BGP2 according to the maximum sheet | seat length, and curve CA2 which shows the change of rotation angle (theta) g of the raising / lowering drive shaft 170. FIG. It is drawing which shows an example of basic raising / lowering pattern BGP2 according to the maximum sheet | seat length, and curve CH2 which shows the change of the height Hg of the upper surface of the great 141. FIG. 6 is a diagram illustrating a change in peripheral speed Vr of each paper feed roller according to roller speed control patterns RCP120 and RCP240. It is drawing which shows an example of the order raising / lowering pattern DGP according to the sheet | seat length of a process order. It is drawing which shows an example of the raising / lowering speed control pattern GCP120 according to the sheet length of a process order, and an example of the raising / lowering speed control pattern GCP240 according to the sheet length of a process order. It is drawing which shows an example of the raising / lowering speed control pattern GCP120 according to the sheet | seat length of a process order, and curve CA3 which shows the change of rotation angle (theta) g of the raising / lowering drive shaft 170. FIG. It is drawing which shows an example of the raising / lowering speed control pattern GCP120 according to the sheet | seat length of a process order, and curve CH3 which shows the change of the height Hg of the upper surface of the great 141. FIG. 10 is a timing chart showing temporal relationships among a roller speed control pattern RCP120, a lifting speed control pattern GCP120, a feed start signal SF, and a detection signal SD. 6 is a timing chart showing a temporal relationship between a roller speed control pattern RCP120 and a curve CH3 indicating a change in the height Hg of the upper surface of the great 141. 10 is a timing chart showing a temporal relationship between a roller speed control pattern RCP120 and a lifting speed control pattern GCP120-1 when the corrugated board sheet SH has a minimum sheet length. 10 is a timing chart showing a temporal relationship between a roller speed control pattern RCP120 and a lifting speed control pattern GCP120-2 when the corrugated board sheet SH has a maximum sheet length. It is drawing which shows typically the structure of the motion conversion mechanism 140A in a modification. It is drawing which shows typically the structure of the motion conversion mechanism 140B in a modification.

[Embodiment]
A corrugated cardboard box making machine 1 including a corrugated cardboard sheet feeding device 2 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The corrugated cardboard box making machine 1 performs processing such as printing, grooving, and punching on the corrugated cardboard sheet fed from the corrugated cardboard sheet feeding device 2. In the drawings, a vertical direction, a horizontal direction, and a front-rear direction are determined according to directions indicated by arrows.

<Overall configuration>
FIG. 1 is a front view showing an overall configuration of a corrugated cardboard box making machine 1. In FIG. 1, a corrugated cardboard box making machine 1 includes a corrugated cardboard sheet feeding device 2 that feeds the corrugated cardboard sheets SH one by one, a printing device 3 that performs printing on the corrugated cardboard sheet SH, and a ruled line on the corrugated cardboard sheet SH. And a die cutter 5 for forming a punched portion having a predetermined shape on the corrugated board sheet SH.

  The cardboard sheet feeding device 2 includes a table 20. A number of cardboard sheets SH manufactured by the corrugating machine are stacked on the table 20 between the front gate 21 and the back guide 22. The front gate 21 is arranged so that the cardboard sheets SH are sent one by one from the gap between the front gate 21 and the table 20. The back guide 22 is configured to be movable in a direction parallel to the feeding direction FD with respect to the front gate 21, and is configured to accommodate cardboard sheets having different lengths in the feeding direction FD. The corrugated cardboard sheet feeding device 2 includes a large number of paper feed rollers, a liftable lift, and a pair of feed rolls 23 and 24. When the great is lowered from a large number of paper feeding rollers, the large number of paper feeding rollers contact the lowermost corrugated paper sheet SH among the many corrugated cardboard sheets SH, thereby feeding the corrugated paper sheets SH one by one. Send to rolls 23 and 24. Both feed rolls 23 and 24 feed the corrugated cardboard sheet SH to the printing apparatus 3 one by one. Both feed rolls 23 and 24 are connected to and driven by the main drive motor MT. The detailed configuration of the corrugated board sheet feeding device 2 including a large number of paper feeding rollers and greats will be described later.

  The printing apparatus 3 includes two printing units 30 and 31. Each printing unit includes a printing cylinder called a plate cylinder, a printing plate member, an ink application device, and a press roll. The printing plate member is attached to the outer peripheral surface of the printing cylinder. The ink application apparatus includes inking rolls of different colors for each printing unit. The printing apparatus 3 performs two-color printing on the corrugated cardboard sheet SH by both the printing units 30 and 31, and supplies the printed corrugated cardboard sheet SH to the crease slotter 4. The printing units 30 and 31 are connected to and driven by the main drive motor MT. The printing cylinders 30A, 31A of both printing units 30, 31 have the same diameter Dp.

  The crease slotter 4 includes a crease unit 40 and two slotter units 41 and 42. The creaser unit 40 is provided with a pair of ruled line rolls arranged vertically to perform ruled line processing. Each slotter unit includes an upper slotter to which a slotter blade is attached and a lower slotter in which a groove that can be fitted to the slotter blade is formed in order to perform grooving. The creaser slotter 4 performs crease lines and grooving on the corrugated cardboard sheet SH by the creaser unit 40 and the two slotter units 41 and 42 to form seams, and supplies the corrugated cardboard sheet SH subjected to these processes to the die cutter 5. To do. The creaser unit 40 and the both slotter units 41 and 42 are connected to and driven by the main drive motor MT, respectively.

  The die cutter 5 includes a die cylinder 50 and an anvil cylinder 51 with a conveyance path interposed therebetween. A punching die 52 for punching the cardboard sheet SH is attached to a plate-like body such as a plywood veneer, and this plate-like body is wound around the outer peripheral surface of the die cylinder 50. The punching die 52 punches a desired position of the corrugated cardboard sheet SH that is continuously conveyed. The punching die 52 can be replaced with a punching die having a punching pattern according to the order when the order is changed. The die cylinder 50 and the anvil cylinder 51 are respectively connected to and driven by the main drive motor MT.

<Detailed Configuration of Cardboard Sheet Feeding Device 2>
A detailed configuration of the cardboard sheet feeding device 2 will be described with reference to FIGS. 2 to 5. 2 is a plan view showing an internal configuration of the cardboard sheet feeding device 2 below the table 20, and FIG. 3 is a cross-sectional view of the cardboard sheet feeding device 2 cut along line AA shown in FIG. is there. In FIG. 2, the cardboard sheet feeding device 2 includes a front frame 60, a rear frame 61, and a pair of intermediate frames 62 and 63 disposed between the frames 60 and 61. The motor mounting plate 64 is fixed to the front of the front frame 60, and the bearing mounting plate 65 is fixed to the rear of the front frame 60. The motor mounting plate 66 is fixed to the rear of the rear frame 61, and the bearing mounting plate 67 is fixed to the front of the rear frame 61. A left frame 68 and a right frame 69 extend in the front-rear direction and are fixed to the intermediate frames 62 and 63, respectively. In FIG. 3, the lower frame 70 is fixed to the left frame 68 and the right frame 69, respectively.

  The elevating motor 80 is composed of an AC servo motor and is fixed to the motor mounting plate 64. A pair of bearings 81 and 82 are respectively fixed to the bearing mounting plate 65 and rotatably support the intermediate drive shaft 83. The rotating shaft of the elevating motor 80 is connected to the intermediate drive shaft 83 by the connecting body 84. An encoder 85 is connected to the rotating shaft of the lifting motor 80.

  The first roller motor 90 and the second roller motor 91 are composed of AC servo motors, and are respectively fixed to the motor mounting plate 64. A pair of bearings 92 and 93 are fixed to the bearing mounting plate 65, respectively, and rotatably support the first roller drive shaft 94. The rotating shaft of the first roller motor 90 is connected to the first roller driving shaft 94 by a connecting body 95. A pair of bearings 96 and 97 are fixed to the bearing mounting plate 65, respectively, and rotatably support the second roller drive shaft 98. The rotation shaft of the second roller motor 91 is connected to the second roller drive shaft 98 by the connecting body 99. Encoders 100 and 101 are connected to the rotation shaft of the first roller motor 90 and the rotation shaft of the second roller motor 91, respectively.

  The third roller motor 102 and the fourth roller motor 103 are composed of AC servo motors and are fixed to the motor mounting plate 66, respectively. A pair of bearings 104 and 105 are respectively fixed to the bearing mounting plate 67 and rotatably support the third roller drive shaft 106. The rotation shaft of the third roller motor 102 is connected to the third roller drive shaft 106 by a connecting body 107. A pair of bearings 108 and 109 are respectively fixed to the bearing mounting plate 67 and rotatably support the fourth roller drive shaft 110. The rotating shaft of the fourth roller motor 103 is connected to the fourth roller driving shaft 110 by the connecting body 111. Encoders 112 and 113 are connected to the rotation shaft of the third roller motor 102 and the rotation shaft of the fourth roller motor 103, respectively.

  In FIG. 2, first to fourth roller support shafts 120 to 123 extend in the front-rear direction in a state of being parallel to each other, and are rotatably supported by both intermediate frames 62 and 63, respectively. A number of first paper feed rollers 124 are fixed to the first roller support shaft 120, and a number of second paper feed rollers 125 are fixed to the second roller support shaft 121. A large number of third paper feed rollers 126 are fixed to the third roller support shaft 122, and a large number of fourth paper feed rollers 127 are fixed to the fourth roller support shaft 123. The first to fourth paper feed rollers 124 to 127 are arranged in a staggered manner so as not to interfere with each other. The paper feed rollers 124 to 127 have the same diameter Dr.

  The first roller drive shaft 94 is connected to the first roller support shaft 120 by a connecting body 128, and the second roller drive shaft 98 is connected to the second roller support shaft 121 by a connecting body 129. The third roller drive shaft 106 is connected to the third roller support shaft 122 by a connecting body 130, and the fourth roller drive shaft 110 is connected to the fourth roller support shaft 123 by a connecting body 131.

  The cardboard sheet feeding device 2 includes a motion conversion mechanism 140. The motion conversion mechanism 140 is a mechanism that converts the rotation in one direction of the lifting motor 80 into the lifting motion of the great 141. In FIG. 2, a large number of greats are arranged in the front-rear direction so as to cover an area where a large number of paper feed rollers 124 to 127 are arranged. In FIG. 2, only one great 141 is shown, and the other is not shown.

(Detailed configuration of the motion conversion mechanism 140)
The motion conversion mechanism 140 includes a plurality of support mechanisms 142 that support the great 141 so as to be movable up and down, and a swing mechanism 143. The swing mechanism 143 converts the rotation of the lifting motor 80 in one direction into a swing motion and transmits it to the support mechanism 142.

  The configuration of each support mechanism 142 will be described with reference to FIG. The support mechanism 142 includes a pair of connecting blocks 150 and 151, a pair of two-arm levers 152 and 153, and a connecting rod 154. In FIG. 3, the left mounting member 155 is fixed to the right side surface of the left frame 68, and the right mounting member 156 is fixed to the left side surface of the right frame 69. The left two-arm lever 152 is rotatably attached to the left attachment member 155 by a rotation shaft 157. The right two-arm lever 153 is pivotally attached to the right attachment member 156 by a pivot shaft 158.

  In FIG. 3, the great 141 is disposed above the four roller support shafts 120 to 123 and in a state of being close to these roller support shafts. The left connecting block 150 is fixed to the left end portion of the great 141 and extends downward. A right connecting block 151 is fixed to the right end of the great 141 and extends downward. One arm portion 152A of the left two-arm lever 152 is connected to the lower end portion of the left connecting block 150 by a connecting pin 159. One arm portion 153 </ b> A of the right two-arm lever 153 is coupled to the lower end portion of the right coupling block 151 by the coupling pin 160.

  The connecting rod 154 is disposed horizontally below the four roller support shafts 120 to 123. The right end portion of the connecting rod 154 extends rightward through a through hole 161 formed in the right frame 69. The left end portion of the connecting rod 154 is connected to the other arm portion 152 </ b> B of the left two-arm lever 152 by the connecting pin 162. An intermediate portion of the connecting rod 154 adjacent to the right frame 69 is connected to the other arm portion 153B of the right two-arm lever 153 by a connecting pin 163.

  The configuration of the swing mechanism 143 will be described with reference to FIGS. The swing mechanism 143 includes a lift drive shaft 170, an eccentric member 171, a swing member 172, and a lift connecting shaft 173.

  In FIG. 2, the auxiliary frame 174 is fixed to the left side surface of the left intermediate frame 62 at a predetermined interval by a plurality of spacers 175. The elevating drive shaft 170 is supported by the auxiliary frame 174 so as to be rotatable by a bearing 176. The elevating drive shaft 170 is connected to the intermediate drive shaft 83 by a connecting body 177.

  FIG. 4 is a drawing schematically showing the connection relationship between the support mechanism 142 and the swinging mechanism 143, and is a view seen from the left side of the auxiliary frame 174. In FIG. 4, the eccentric member 171 is fixed to the lifting drive shaft 170. The eccentric member 171 is formed in a circular shape and has a rotation axis that is eccentric from the rotation axis of the elevating drive shaft 170. The swing member 172 is fixed to the lift connection shaft 173 and can swing about the lift connection shaft 173. The swing member 172 has a substantially rectangular fitting groove 178. The fitting groove 178 has a pair of contact surfaces 178A and 178B that face each other. Both contact surfaces 178A and 178B are formed to extend in a direction parallel to a line connecting the center of the outer shape circle of the eccentric member 171 and the rotation center of the elevating connection shaft 173. The outer peripheral surface of the eccentric member 171 is always in contact with both contact surfaces 178A and 178B of the fitting groove 178.

  In FIG. 2, the elevating connection shaft 173 is rotatably supported on the right side surface of the right frame 69 by a plurality of bearings 179. The elevating connection shaft 173 is disposed in parallel with the roller support shafts 120 to 123. The plurality of connecting members 180 are fixed to the elevating connecting shaft 173 at positions corresponding to the plurality of support mechanisms 142, respectively. As shown in FIG. 3, each connecting member 180 is connected to the right end portion of the connecting rod 154 of the corresponding support mechanism 142 by a connecting pin 181.

  5A to 5C show a state in which the swing angle of the swing member 172 changes as the eccentric member 171 rotates. In FIG. 5, the reference angular position RP is an angular position that coincides with a line connecting the rotation center of the eccentric member 171 and the rotation center of the elevating connection shaft 173. The rotation center of the eccentric member 171 is also the rotation center of the lifting drive shaft 170. The angular position of the swing member 172 shown in FIG. 5A is a position rotated clockwise by a predetermined angle θs from the reference angular position RP. In the angular position of the swinging member 172 shown in FIG. 5A, the great 141 is located at the lowermost lowermost position. The angular position of the swing member 172 shown in FIG. 5C is a position rotated counterclockwise by a predetermined angle θs from the reference angular position RP. In the angular position of the swing member 172 shown in FIG. 5C, the great 141 is located at the uppermost uppermost position. The angular position of the swing member 172 shown in FIG. 5B is a position that coincides with the reference angular position RP. In the angular position of the swing member 172 shown in FIG. 5B, the great 141 is located at an intermediate position between the lowermost position and the uppermost position. In the present embodiment, the predetermined angle θs is set to an angle of 6 °. In the present embodiment, when the swing member 172 swings to the angular position shown in FIG. 5A, the right end portion of the connecting rod 154 is elastically deformed as the connecting pin 181 moves slightly downward. Configured as follows.

(Configuration of rotational position sensor 190)
A rotational position sensor 190 is provided for detecting a predetermined rotational position of the lifting drive shaft 170. The rotational position sensor 190 includes an optical sensor 191 and a light shield 192. The optical sensor 191 has a known configuration including a light emitting unit and a light receiving unit, and is fixed to the bearing mounting plate 65 as shown in FIG. As shown in FIG. 2, the light shield 192 is fixed to an intermediate drive shaft 83 that is connected to the lifting drive shaft 170. Each time the elevating drive shaft 170 reaches a predetermined rotational position, the light shield 192 blocks light from the light emitting portion of the optical sensor 191.

  In FIG. 4, the optical sensor 191 and the light shield 192 are indicated by a two-dot chain line. The rotational position of the light shield 192 shown in FIG. 4 is the rotational position immediately before the light shield 192 passes through the optical sensor 191. In the state shown in FIG. 4, the great 141 is located at a height before reaching the uppermost position. In the present embodiment, when the elevating drive shaft 170 rotates to a predetermined rotation position and the great 141 reaches the uppermost position, the rotation position sensor 190 generates a detection signal SD.

<Electrical configuration>
The electrical configuration of the corrugated board box making machine 1 will be described below with reference to FIG. FIG. 6 is a block diagram showing a basic electrical configuration of the corrugated cardboard box making machine 1.

  In order to generally manage the processing of the corrugated cardboard sheet in the corrugated cardboard box making machine 1, a high order management device 200 and a low order management device 210 are provided. In the present embodiment, the upper management apparatus 200 stores a production management plan for executing a large number of orders in a predetermined order. For each order, the upper management apparatus 200 sends control command information regarding the sheet conveyance speed, the size of the corrugated cardboard sheet SH, and the processing quantity to the lower management apparatus 210.

  The lower management apparatus 210 controls the operation of the drive unit such as the main drive motor MT according to the control command information sent from the higher management apparatus 200, counts the processing quantity of the cardboard sheet SH, and sends it to the higher management apparatus 200. It is a device that performs management control. The lower management apparatus 210 is connected to the program memory 220 and the work memory 230, and together with these memories constitutes a computer that controls the cardboard sheet box making machine 1. The program memory 220 fixedly stores a control program for controlling the entire corrugated board box making machine 1, a pattern creation program for creating an order raising / lowering pattern according to the sheet length of each order, a predetermined set value, and the like. It is memory. The work memory 230 is a memory that temporarily stores various information and arithmetic processing results sent from the higher-level management device 200 when executing the control program.

  The lower management apparatus 210 is connected to the operation panel 240. The operation panel 240 includes a feed button 241 and an order end button 242. The feeding button 241 is operated to start feeding the cardboard sheet SH by the cardboard sheet feeding device 2. When the feed button 241 is operated, the operation panel 240 generates a feed start signal SF. The order end button 242 is operated to end the currently executed order.

  The lower management device 210 is connected to the drive control device 250, the print control device 251, the crease slotter control device 252, the die cutter control device 253, and the roller motor control device 254, respectively. The drive control device 250 controls the drive and stop of the main drive motor MT and the rotation speed thereof according to the control command information from the lower management device 210. The rotation speed of the main drive motor MT is controlled according to the sheet conveyance speed in the control command information. The print control device 251 controls the operation of the print units 30 and 31 according to the control command information from the lower management device 210. The crease slotter control device 252 controls the operation of the creaser unit 40 and the operation of the slotter units 41 and 42 according to the control command information from the lower management device 210. The die cutter control device 253 controls the operation of the die cutter 5 in accordance with the control command information from the lower management device 210.

  A rotational position sensor 190 is connected to the lower management apparatus 210. When the feed button 241 is operated, the lower management device 210 sends control command information including a feed start command to the roller motor control device 254. In addition, the lower management device 210 sends control command information including a synchronization command to the roller motor control device 254 every time it receives a detection signal SD from the rotational position sensor 190 after sending a feed start command.

  The roller motor control device 254 controls a series of operations of the motion controller 260 according to the control command information from the lower management device 210. A basic roller pattern memory 261 is connected to the roller motor control device 254. The basic roller pattern memory 261 stores a predetermined basic roller pattern BRP for controlling the rotation speed of the roller motors 90, 91, 102, and 103. When the lower management apparatus 210 receives control command information for preparing to execute the machining order from the upper management apparatus 200, the lower management apparatus 210 sends control command information including the order preparation instruction to the roller motor control apparatus 254. . When the roller motor control device 254 receives control command information including an order preparation command from the lower-level management device 210, the roller motor control device 254 reads the basic roller pattern BRP from the basic roller pattern memory 261 and generates a pattern creation command. The roller motor control device 254 sends a pattern creation command to the motion controller 260. The pattern creation command includes the sheet conveyance speed in the control command information from the lower management apparatus 210 and the basic roller pattern BRP. Further, the roller motor control device 254 sends a motion start command to the motion controller 260 in accordance with a feed start command or a synchronization command in the control command information from the lower management device 210.

  The motion controller 260 includes a motion CPU and is connected to the program memory 262 and the speed control pattern memory 263. The program memory 262 stores in advance a pattern creation program for creating the roller speed control pattern RCP and a phase difference setting value DPP. The phase difference setting value DPP is such that the start phase of the acceleration region BR1 of the basic roller pattern BRP shown in FIG. It is a value for setting a phase difference that is displaced in the horizontal axis direction. In the present embodiment, the phase difference set value DPP is set to an angle of 70 ° in terms of the rotation angle θp of each printing cylinder. The speed control pattern memory 263 temporarily stores the roller speed control pattern RCP created by the motion controller 260. The roller speed control pattern RCP includes a series of a number of speed control commands for commanding the rotation speed of the roller motor. The motion controller 260 executes a pattern creation program when it receives a pattern creation command from the roller motor control device 254. By executing the pattern creation program, the motion controller 260 creates a roller speed control pattern RCP based on the sheet conveyance speed and the basic roller pattern BRP in the pattern creation command, and temporarily stores them in the speed control pattern memory 263.

  When the motion controller 260 receives a motion start command from the roller motor control device 254, the motion controller 260 reads each speed control command from the speed control pattern memory 263 and sends it to the drive control circuit 264 every predetermined control cycle. The predetermined control cycle is, for example, 1 msec, and even when the sheet conveying speed is set to the highest sheet conveying speed in the corrugated cardboard box making machine 1, the motion controller 260 reliably performs processing such as reading the speed control command. It is a period that can be executed. The basic configuration of the motion controller 260 is disclosed in Japanese Patent Application Laid-Open No. 2006-72399, Japanese Patent Application Laid-Open No. 11-272312, Japanese Patent Application Laid-Open No. 5-50329, and the like and is generally known, and thus detailed description thereof is omitted. .

  The drive control circuit 264 receives the speed control command from the motion controller 260 and the rotation pulses from the encoder groups 100, 101, 112, 113, and the rotation speed of the roller motors 90, 91, 102, 103, the rotation and Control with stop. That is, the drive control circuit 264 controls the power supplied to each roller motor so that the rotation speed of each roller motor becomes a rotation speed according to the speed control command during a predetermined control cycle. By the rotation of the roller motors 90, 91, 102, 103, the paper feed rollers 124 to 127 in FIG. 3 rotate counterclockwise as indicated by arrows. In the present embodiment, each encoder has a configuration capable of generating a large number of rotation pulses, for example, 1000 pulses / msec or more during a predetermined control period.

  A basic lift pattern memory 270 and an order lift pattern memory 271 are connected to the lower management apparatus 210, respectively. The basic lift pattern memory 270 controls the rotational speed of the lift motor 80, and a basic lift pattern BGP1 that is predetermined according to the minimum sheet length and a basic lift pattern that is predetermined according to the maximum sheet length. Each of BGP2 is stored. The order lifting pattern memory 271 temporarily stores the order lifting pattern DGP.

  The lower management apparatus 210 executes a pattern creation program stored in the program memory 220 when receiving control command information for preparing execution of a machining order from the higher management apparatus 200. By executing the pattern creation program, the lower-level management device 210 moves the order up / down according to the sheet length of the processing order based on one of the basic lift patterns BGP1 and BGP2 stored in the basic lift pattern memory 270. A pattern DGP is created and temporarily stored in the order raising / lowering pattern memory 271. Thereafter, the lower management apparatus 210 reads the order elevation pattern DGP from the order elevation pattern memory 271 and generates a pattern creation command. The pattern creation command includes the sheet conveyance speed in the control command information from the upper level management apparatus 200 and the order lifting pattern DGP.

  When the feed button 241 is operated, the lower management apparatus 210 receives a feed start signal SF from the operation panel 240 and sends control command information including a feed start command to the motion controller 280 as a motion activation command. In addition, the lower management apparatus 210 sends control command information including a synchronization command to the motion controller 280 as a motion activation command every time it receives a detection signal SD from the rotational position sensor 190 after sending a feed start command.

  A motion controller 280 is connected to the lower management apparatus 210. The motion controller 280 includes a motion CPU and is connected to a program memory 281 that stores a program and a speed control pattern memory 282. The program memory 281 stores in advance a pattern creation program for creating the elevation speed control pattern GCP. The speed control pattern memory 282 temporarily stores the ascending / descending speed control pattern GCP created by the motion controller 280. The lifting / lowering speed control pattern GCP includes a series of speed control commands for commanding the rotational speed of the lifting / lowering motor 80. The motion controller 280 executes a pattern creation program when receiving a pattern creation command from the lower management apparatus 210. By executing the pattern creation program, the motion controller 280 creates the elevation speed control pattern GCP based on the sheet conveyance speed and the order elevation pattern DGP in the pattern creation command, and temporarily stores them in the speed control pattern memory 282.

  When the motion controller 280 receives a motion start command from the lower-level management device 210, the motion controller 280 reads each speed control command from the control pattern memory 282 and sends it to the drive control circuit 283 every predetermined control cycle. The predetermined control cycle is, for example, 1 msec, and even when the sheet conveyance speed is set to the highest sheet conveyance speed in the corrugated cardboard box making machine 1, the motion controller 280 reliably performs processing such as reading of the speed control command. It is a period that can be executed. The basic configuration of the motion controller 280 is the same as that of the motion controller 260.

  The drive control circuit 283 receives the speed control command from the motion controller 280 and the rotation pulse from the encoder 85, and controls the rotation speed of the elevating motor 80 and its rotation and stop. That is, the drive control circuit 283 controls the power supplied to the lift motor 80 so that the rotation speed of the lift motor 80 becomes a rotation speed according to the speed control command during a predetermined control cycle. While the rotating shaft of the lifting motor 80 rotates once, the eccentric member 171 rotates once in the clockwise direction indicated by the arrow in FIGS. 4 and 5, and the great 141 performs one lifting motion. In the present embodiment, the encoder 85 has a configuration capable of generating a large number of rotation pulses, for example, 1000 pulses / msec or more during a predetermined control period.

<Basic roller pattern BRP>
The basic roller pattern BRP will be described with reference to FIG. The basic roller pattern BRP is a basic pattern for creating the roller speed control pattern RCP. FIG. 7 shows an example of the basic roller pattern BRP in the present embodiment. In FIG. 7, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the vertical axis represents the speed ratio Rf of the circumferential speed Vr of each paper feed roller to the circumferential speed Vp of each printing cylinder.

  In FIG. 7, the basic roller pattern BRP includes an acceleration region BR1 where the rotation angle θp changes from an angle of 0 ° to an angle of 65 °, and a constant speed region where the rotation angle θp changes from an angle of 65 ° to an angle of 200 °. BR2, a deceleration region BR3 in which the rotation angle θp changes from an angle of 200 ° to an angle of 330 °, and a stop region BR4 in which the rotation angle θp changes from an angle of 330 ° to an angle of 360 °.

  The acceleration at which each of the roller motors 90, 91, 102, 103 is accelerated in the acceleration region BR1 is the maximum acceleration of each roller motor so that the change amount of the rotation angle θp in the acceleration region BR1 is as small as possible. Predetermined on the basis. In particular, the peripheral speed Vr of each paper feed roller is changed from the stopped state to the peripheral speed Vp of each printing cylinder while the leading end of the corrugated board sheet SH is fed by the distance LF shown in FIG. It is necessary to determine the acceleration of the acceleration region BR1 so that the acceleration is accelerated up to. The distance LF is a distance from the front gate 2 to the nip positions of both feed rolls 23 and 24 in the feeding direction FD.

  The longest period during which the corrugated board sheet SH is fed by the sheet feeding rollers 124 to 127 in the processing cycle in which the printing cylinder rotates once, that is, the period in which the rotation angle θp changes from 0 ° to 360 ° is the acceleration region. Since this is the total period of BR1 and constant speed area BR2, the amount of change in rotation angle θp in acceleration area BR1 and constant speed area BR2 is determined in advance based on the maximum sheet length that can be processed in corrugated cardboard box making machine 1. Determined. In the constant speed region BR2, the peripheral speed Vp of each printing cylinder and the peripheral speed Vr of each paper feed roller are the same speed, and need to be a peripheral speed corresponding to the sheet conveying speed, and the speed ratio Rf = 1. . The acceleration at which each roller motor is decelerated in the deceleration region BR3 is set to be smaller than the acceleration in the acceleration region BR1 so that each roller motor is reliably stopped in the stop region BR4.

  The upper surface of the great 141 is worn by frictional contact with the corrugated cardboard sheet SH. When the upper surface of the great 141 is worn, the position of the upper surface of the great 141 is changed to a lower position by the amount of wear, and the timing at which the lower surface of the corrugated board sheet SH comes into contact with each sheet feeding roller according to the worn amount. Change. At the start of the processing cycle, the period of the stop region BR4 is set in consideration of a predetermined allowable wear amount with respect to the upper surface of the great 141 so that the corrugated board sheet SH is surely in contact with each of the paper feed rollers in the stopped state. Predetermined. In the present embodiment, the allowable wear amount is set to 0.4 mm.

<Basic lifting pattern BGP1 predetermined according to the minimum sheet length>
The basic lift pattern BGP1 will be described with reference to FIGS. The basic lifting pattern BGP1 is one of two basic patterns for creating the lifting speed control pattern GCP. 8 and 9 show an example of a basic lifting pattern BGP1 that is predetermined according to the minimum sheet length in the present embodiment. For example, the minimum sheet length is 145 mm. In FIG. 8, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the left vertical axis represents the speed ratio Rg of the angular velocity ωg of the elevating drive shaft 170 to the angular velocity ωp of each printing cylinder. The axis represents the rotation angle θg of the lift drive shaft 170. A curve CA1 indicated by a broken line in FIG. 8 is a curve indicating a change in the rotation angle θg of the elevating drive shaft 170. In FIG. 9, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the left vertical axis represents the speed ratio Rg of the angular speed ωg of the elevating drive shaft 170 to the angular speed ωp of each printing cylinder. The axis represents the height Hg of the upper surface of the great 141 in millimeters with the upper surface of the table 20 as a reference. A curve CH1 indicated by a broken line in FIG. 9 is a curve indicating a change in the height Hg of the upper surface of the great 141. In the present embodiment, the great 141 moves up and down between an uppermost position 2 mm higher than the upper surface of the table 20 and a lowermost position 2 mm lower than the upper surface of the table 20. Each paper feed roller is disposed so that the uppermost portion of the outer peripheral surface of each paper feed roller of the paper feed rollers 124 to 127 is located 0.9 mm higher than the upper surface of the table 20. A position PR indicated by a broken line in FIG. 9 is the uppermost position on the outer peripheral surface of each paper feed roller.

  In FIG. 8, the basic elevating pattern BGP1 includes a descending variable speed region BG11 in which the rotation angle θp changes from an angle of 0 ° to an angle of 83 °, and a downward direction in which the rotation angle θp changes from an angle of 83 ° to an angle of 100 °. A control region BG12, an ascending variable speed region BG13 whose rotation angle θp changes from an angle of 100 ° to an angle of 183 °, an upper control region BG14 whose rotation angle θp changes from an angle of 183 ° to an angle of 360 °, Have The descending variable speed region BG11 has an acceleration region BG11A and a deceleration region BG11B. The ascending variable speed region BG13 has an acceleration region BG13A and a deceleration region BG13B. In the present embodiment, the acceleration at which the elevating motor 80 is accelerated in the acceleration regions BG11A and BG13A and the acceleration at which the elevating motor 80 is decelerated in the deceleration regions BG11B and BG13B are determined to be the same acceleration. The descending variable speed region BG11 and the ascending variable speed region BG13 are arranged at intervals corresponding to the minimum sheet length in the direction in which the rotation angle θp increases, that is, in the direction of the horizontal axis in FIG.

  Since the minimum sheet length can be reduced as the change amount of the rotation angle θp in the acceleration regions BG11A, BG13A and the deceleration regions BG11B, BG13B is as small as possible, the accelerations in the acceleration regions BG11A, BG13A, and the deceleration regions BG11B The acceleration of BG13B is determined in advance based on the maximum acceleration of the lifting motor 80.

  In FIG. 8, the area AR1 of the hatched portion is surrounded by an extended line of the inclined line representing the deceleration region BG11B, an extended line of the inclined line representing the acceleration region BG13A, and a horizontal horizontal axis where the speed ratio Rg = 0. The area of the range. The area AR2 of the hatched portion is an area in a range surrounded by both extension lines and a horizontal line representing the lower control region BG12. The lower control region BG12 is determined so that both areas AR1 and AR2 have the same area.

  In FIG. 8, the rotation angle θg of the elevating drive shaft 170 reaches 360 ° when the rotation angle θp reaches 183 °, and is then held at an angle of 360 ° in the upper control region BG14. The In FIG. 9, the height Hg of the upper surface of the great 141 is lower than the position PR in the middle of the acceleration region BG11A, and is higher than the position PR in the middle of the deceleration region BG13B.

<Basic lifting pattern BGP2 predetermined according to maximum sheet length>
The basic lift pattern BGP2 will be described with reference to FIGS. The basic lifting pattern BGP2 is the other of the two patterns that are the basis for creating the lifting speed control pattern GCP. 10 and 11 show an example of the basic lifting pattern BGP2 that is predetermined according to the maximum sheet length in the present embodiment. For example, the maximum sheet length is 580 mm. 10, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the left vertical axis represents the speed ratio Rg of the angular speed ωg of the elevating drive shaft 170 to the angular speed ωp of each printing cylinder. The axis represents the rotation angle θg of the lift drive shaft 170. A curve CA2 indicated by a broken line in FIG. 10 is a curve indicating a change in the rotation angle θg of the elevating drive shaft 170. In FIG. 11, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the left vertical axis represents the speed ratio Rg of the angular velocity ωg of the elevating drive shaft 170 to the angular velocity ωp of each printing cylinder. The axis represents the height Hg of the upper surface of the great 141 in millimeters with the upper surface of the table 20 as a reference. A curve CH2 indicated by a broken line in FIG. 11 is a curve indicating a change in the height Hg of the upper surface of the great 141. A position PR indicated by a broken line in FIG. 11 is the uppermost position on the outer peripheral surface of each paper feed roller.

  In FIG. 10, the basic elevating pattern BGP2 includes a descending variable speed region BG21 in which the rotation angle θp changes from an angle of 0 ° to an angle of 100 °, and a downward direction in which the rotation angle θp changes from an angle of 100 ° to an angle of 205 °. A control region BG22, an ascending variable speed region BG23 in which the rotation angle θp changes from an angle of 205 ° to an angle of 305 °, an upper control region BG24 in which the rotation angle θp changes from an angle of 305 ° to an angle of 360 °, Have The descending variable speed region BG21 has an acceleration region BG21A and a deceleration region BG21B. The ascending variable speed region BG23 has an acceleration region BG23A and a deceleration region BG23B. In the present embodiment, the acceleration at which the elevating motor 80 is accelerated in the acceleration regions BG21A and BG23A and the acceleration at which the elevating motor 80 is decelerated in the deceleration regions BG21B and BG23B are determined to be the same acceleration. The accelerations in the acceleration regions BG21A and BG23A and the accelerations in the deceleration regions BG21B and BG23B are the same as the accelerations in the acceleration regions BG11A and BG13A and the accelerations in the deceleration regions BG11B and BG13B. The descending variable speed region BG21 and the ascending variable speed region BG23 are arranged at intervals corresponding to the maximum sheet length in the direction in which the rotation angle θp increases, that is, in the direction of the horizontal axis in FIG.

  Since the maximum sheet length can be increased as the change amount of the rotation angle θp in the acceleration regions BG21A and BG23A and the deceleration regions BG21B and BG23B is as small as possible, the acceleration of the acceleration regions BG21A and BG23A and the deceleration region BG21B The acceleration of BG23B is determined in advance based on the maximum acceleration of the lifting motor 80.

  In FIG. 10, the rotation angle θg of the elevating drive shaft 170 reaches 360 ° when the rotation angle θp reaches 305 °, and is then held at an angle of 360 ° in the upper control region BG24. The In FIG. 11, the height Hg of the upper surface of the great 141 is lower than the position PR in the middle of the acceleration region BG21A, and is higher than the position PR in the middle of the deceleration region BG23B.

<< Operation and Action of Embodiment >>
The operation and action of the corrugated cardboard box making machine 1 of the present embodiment will be described below with reference to the drawings. As operations and actions of the corrugated sheet box making machine 1, operations related to the feeding operation of the corrugated cardboard sheet feeding device 2 will be described in detail, and each of the printing control device 251, the crease slotter control device 252, and the die cutter control device 253 will be described. Since the control operation is well known, detailed description thereof is omitted.

  When the operator operates the order end button 242 or when processing of a predetermined number of sheets is completed in the previous order, the lower management apparatus 210 sends a stop command to each of the control apparatuses 250 to 254. Thereafter, the lower management apparatus 210 receives an order preparation command for preparing to execute the machining order from the upper management apparatus 200. In accordance with the order preparation command, the subordinate management device 210 adjusts the rotation phases of the printing cylinders 30A and 31A, positions the slotter blades, adjusts the rotation phase of the punching die 52, and the like. And the die cutter control device 253. After the control devices 251 to 253 complete the preparation control such as the adjustment of the rotation phase, the operator performs preparatory work such as replacement of the printing plate member, replacement of the slotter blade, and replacement of the punching die 52.

<Creation of roller speed control pattern RCP>
When the lower order management apparatus 210 receives an order preparation command for preparing to execute a machining order from the higher order management apparatus 200, the lower order management apparatus 210 sends the order preparation instruction to the roller motor control device 254. In accordance with the order preparation command, the roller motor control device 254 reads the basic roller pattern BRP from the basic roller pattern memory 261 and generates a pattern creation command. The roller motor control device 254 sends a pattern creation command to the motion controller 260.

  When the motion controller 260 receives a pattern creation command from the roller motor control device 254, the motion controller 260 reads the pattern creation program from the program memory 262 and executes it. By executing the pattern creation program, the motion controller 260 creates a roller speed control pattern RCP based on the sheet conveyance speed and the basic roller pattern BRP in the pattern creation command, and temporarily stores them in the speed control pattern memory 263.

  The creation of the roller speed control pattern RCP will be described with reference to FIG. FIG. 12 shows changes in the peripheral speed Vr of each paper feed roller. In FIG. 12, the horizontal axis represents the elapsed time T in seconds, and the vertical axis represents the peripheral speed Vr of each paper feed roller in meters / second. In FIG. 12, a roller speed control pattern RCP120 indicated by a solid line is a pattern for instructing a peripheral speed Vr of each paper feed roller when the feeding speed of the corrugated cardboard sheet SH is 120 sheets / minute. In FIG. 12, a roller speed control pattern RCP240 indicated by a broken line is a pattern for instructing a peripheral speed Vr of each paper feed roller when the feeding speed of the corrugated cardboard sheet SH is 240 sheets / minute.

  When the sheet conveyance speed in the pattern creation command is a speed corresponding to the feeding speed of 120 sheets / minute of the corrugated cardboard sheet SH, the motion controller 260 sets the basic roller shown in FIG. A roller speed control pattern RCP120 is created based on the pattern BRP. Specifically, when the feeding speed is 120 sheets / minute, each printing cylinder of the printing cylinders 30A and 31A takes 0.5 seconds to rotate by an angle of 360 °, that is, one rotation. . The motion controller 260 converts the rotation angle θp shown in FIG. 7 into the elapsed time T based on the feeding speed of 120 sheets / minute. Further, the motion controller 260 calculates the speed ratio Rf shown in FIG. 7 based on the diameter Dp of each printing cylinder and the feeding speed of 120 sheets / min, as the peripheral speed Vr of each paper feeding roller (= Rf × Dp × π). X120 / 60). Through these conversion processes, the motion controller 260 creates the roller speed control pattern RCP120 shown in FIG. When the feeding speed of the corrugated cardboard sheet SH is 240 sheets / minute, the motion controller 260 sets a roller speed control pattern RCP240 based on the feeding speed of 240 sheets / minute and the basic roller pattern BRP shown in FIG. create.

  The four speed regions included in the roller speed control pattern RCP will be described using the roller speed control pattern RCP120 as an example. In FIG. 12, the roller speed control pattern RCP120 includes an acceleration region RC1, a constant speed region RC2, a deceleration region RC3, and a stop region RC4 when the elapsed time T is from 0 second to 0.5 seconds. The acceleration region RC1, the constant speed region RC2, the deceleration region RC3, and the stop region RC4 are the acceleration region BR1, the constant speed region BR2, the deceleration region BR3, and the stop region BR4 of the basic roller pattern BRP shown in FIG. And correspond respectively. The roller speed control pattern RCP120 similarly includes an acceleration region RC1, a constant speed region RC2, a deceleration region RC3, and a stop region RC4 even when the elapsed time T is between 0.5 seconds and 1 second.

<Creation of order lift pattern DGP>
When the lower management apparatus 210 receives an order preparation command for preparing execution of a machining order from the upper management apparatus 200, the lower management apparatus 210 reads and executes the pattern creation program stored in the program memory 220. By executing the pattern creation program, the lower-level management device 210 moves the order up / down according to the sheet length of the processing order based on one of the basic lift patterns BGP1 and BGP2 stored in the basic lift pattern memory 270. A pattern DGP is created and temporarily stored in the order raising / lowering pattern memory 271. The sheet length of the processing order is commanded within a range from the minimum sheet length to the maximum sheet length. In this embodiment, the lower management apparatus 210 reads out one of the two basic lift patterns BGP1 and BGP2 according to the sheet length of the processing order in the order preparation command, and creates the order lift pattern DGP. .

  The creation of the order lifting pattern DGP corresponding to the sheet length of the processing order will be described with reference to FIG. FIG. 13 shows an example of the order lift pattern DGP corresponding to the sheet length of the processing order. For example, the sheet length of the processing order is 360 mm. In FIG. 13, the horizontal axis represents the rotation angle θp of each printing cylinder of the printing apparatus 3, and the vertical axis represents the speed ratio Rg of the angular speed ωg of the elevating drive shaft 170 to the angular speed ωp of each printing cylinder.

  In FIG. 13, the order raising / lowering pattern DGP includes a descending variable speed region DG1 where the rotation angle θp changes from an angle of 0 ° to an angle of 100 °, and a downward direction where the rotation angle θp changes from an angle of 100 ° to an angle of 144 °. A control region DG2, an ascending variable speed region DG3 in which the rotation angle θp changes from an angle of 144 ° to an angle of 244 °, an upper control region DG4 in which the rotation angle θp changes from an angle of 244 ° to an angle of 360 °, Have The descending variable speed region DG1 has an acceleration region DG1A and a deceleration region DG1B. The ascending variable speed region DG3 has an acceleration region DG3A and a deceleration region DG3B. The accelerations in the acceleration areas DG1A and DG3A and the accelerations in the deceleration areas DG1B and DG3B are the same accelerations as the accelerations in the acceleration areas BG21A and BG23A and the accelerations in the deceleration areas BG21B and BG23B, respectively.

  In FIG. 13, the descending variable speed region DG1 and the ascending variable speed region DG3 are arranged at intervals according to the sheet length of the processing order in the direction in which the rotation angle θp increases, that is, in the direction of the horizontal axis in FIG. The Specifically, the lower management apparatus 210 executes a process of moving the ascending variable speed region BG23 of the basic ascending / descending pattern BGP2 toward the descending variable speed region BG21 until the interval according to the sheet length of the processing order is reached. Thus, the order raising / lowering pattern DGP is created.

<Creation of lifting speed control pattern GCP>
After creating the order elevation pattern DGP, the lower management apparatus 210 generates a pattern creation command and sends it to the motion controller 280. The motion controller 280 reads a pattern creation program from the program memory 281 and executes it when receiving a pattern creation command from the lower management apparatus 210. By executing the pattern creation program, the motion controller 280 creates the elevation speed control pattern GCP based on the sheet conveyance speed and the order elevation pattern DGP in the pattern creation command, and temporarily stores them in the speed control pattern memory 282.

  The creation of the lifting speed control pattern GCP will be described with reference to FIGS. FIG. 14 shows a change in the rotational speed Vg of the elevating motor 80 when a corrugated cardboard sheet having a processing order sheet length is fed. In FIG. 14, the horizontal axis represents the elapsed time T in units of seconds, and the vertical axis represents the rotational speed Vg of the elevating motor 80 in units of meters / second. In FIG. 14, a lifting speed control pattern GCP120 indicated by a solid line is a pattern for instructing the rotational speed Vg of the lifting motor 80 when the feeding speed of the corrugated board sheet SH is 120 sheets / minute. In FIG. 14, a lifting speed control pattern GCP240 indicated by a broken line is a pattern for instructing the rotational speed Vg of the lifting motor 80 when the feeding speed of the corrugated board sheet SH is 240 sheets / minute.

  When the sheet conveyance speed in the pattern creation command is a speed corresponding to the feeding speed of 120 sheets / min of the corrugated cardboard sheet SH, the motion controller 260 increases the order up / down shown in FIG. Based on the pattern DGP, an elevation speed control pattern GCP120 is created. Specifically, when the feeding speed is 120 sheets / minute, each printing cylinder of the printing cylinders 30A and 31A takes 0.5 seconds to rotate by an angle of 360 °, that is, one rotation. . The motion controller 280 converts the rotation angle θp shown in FIG. 13 into the elapsed time T based on the feeding speed of 120 sheets / min. Further, the motion controller 280 converts the speed ratio Rg shown in FIG. 13 into the rotational speed Vg (= Rg × 120) of the lifting motor 80 based on the feeding speed of 120 sheets / min. Through these conversion processes, the motion controller 260 creates the elevation speed control pattern GCP120 shown in FIG. When the feeding speed of the corrugated cardboard sheet SH is 240 sheets / minute, the motion controller 280 sets the lifting speed control pattern GCP240 based on the feeding speed of 240 sheets / minute and the order lifting pattern DGP shown in FIG. create.

  The four speed regions included in the ascending / descending speed control pattern GCP will be described using the ascending / descending speed control pattern GCP120 as an example. In FIG. 14, the ascending / descending speed control pattern GCP120 includes a descending variable speed region GC1, a lower control region GC2, an ascending variable speed region GC3, and an upper control region during the elapsed time T from 0 seconds to 0.5 seconds. Including GC4. The descending variable speed region GC1, the lower control region GC2, the ascending variable speed region GC3, and the upper control region GC4 are the descending variable speed region DG1 and the lower control region DG2 of the order ascending / descending pattern DGP shown in FIG. This corresponds to the variable speed region DG3 and the upper control region DG4, respectively. The ascending / descending speed control pattern GCP120 is similar to the descending variable speed area GC1, the lower control area GC2, the ascending variable speed area GC3, and the upper control area GC4 even when the elapsed time T is between 0.5 seconds and 1 second. Included. The descending variable speed region GC1 includes an acceleration region GC1A and a deceleration region GC1B. The ascending variable speed region GC3 includes an acceleration region GC3A and a deceleration region GC3B.

  15 and 16 show an enlarged view of the ascending / descending speed control pattern GCP120 in a period in which each printing cylinder makes one rotation, that is, in one machining cycle. In FIG. 15, the horizontal axis represents the elapsed time T in seconds, the left vertical axis represents the rotational speed Vg of the lifting motor 80 in units of revolutions / minute, and the right vertical axis represents the rotational angle θg of the lifting drive shaft 170. Represents. A curve CA3 indicated by a broken line in FIG. 15 is a curve indicating a change in the rotation angle θg of the elevating drive shaft 170. In FIG. 16, the horizontal axis represents the elapsed time T in seconds, the left vertical axis represents the rotational speed Vg of the elevating motor 80 in units of revolutions / minute, and the right vertical axis represents the rate with reference to the upper surface of the table 20. The height Hg of the upper surface of 141 is expressed in units of millimeters. A curve CH3 indicated by a broken line in FIG. 16 is a curve indicating a change in the height Hg of the upper surface of the great 141. A position PR indicated by a broken line in FIG. 16 is the uppermost position on the outer peripheral surface of each paper feed roller.

  In FIG. 15, the rotation angle θg of the elevating drive shaft 170 reaches an angle of 360 ° at the end of the deceleration region GC3B of the ascending variable speed region GC3, and is then held at an angle of 360 ° in the upper control region GC4. The In FIG. 16, the height Hg of the upper surface of the great 141 is lower than the position PR at a time TA in the middle of the acceleration region GC1A, and is higher than the position PR at a time TB in the middle of the deceleration region GC3B.

<Feeding operation of cardboard sheet SH>
The feeding operation of the cardboard sheet SH when the feeding speed is 120 sheets / min will be described with reference to FIGS. FIG. 17 is a timing chart showing temporal relationships among the roller speed control pattern RCP120, the elevation speed control pattern GCP120, the feed start signal SF from the operation panel 240, and the detection signal SD from the rotational position sensor 190. . In FIG. 17, the horizontal axis represents the elapsed time T in seconds, the left vertical axis represents the peripheral speed Vr of each paper feed roller in meters / second, and the right vertical axis represents the rotational speed Vg of the lifting motor 80. Expressed in units of / min. FIG. 18 is a timing chart showing the temporal relationship between the roller speed control pattern RCP120 and the curve CH3 indicating the change in the height Hg of the upper surface of the great 141. In FIG. 18, the horizontal axis represents the elapsed time T in seconds, the left vertical axis represents the peripheral speed Vr of each paper feed roller in units of meters / second, and the right vertical axis represents the height Hg of the upper surface of the great 141. Expressed in millimeters.

  When the operator operates the feeding button 241 after the preparation for execution of the processing order is completed, the lower management apparatus 210 receives the feeding start signal SF from the operation panel 240. In accordance with the feed start signal SF, the lower-level management device 210 sends control command information including a feed start command and a sheet conveyance speed to the drive control device 250 and the roller motor control device 254, and sends the control command information to the motion start command. To the motion controller 280.

  The drive control device 250 drives the main drive motor MT according to the sheet conveyance speed in the control command information, and rotates it at a rotation speed corresponding to the sheet conveyance speed. Due to the rotation of the main drive motor MT, the printing cylinders 30A, 31A of the printing units 30, 31 and the upper slotters of the slotter units 41, 42, etc., feed speed corresponding to the sheet conveying speed, for example, a speed of 120 sheets / min. Rotate with.

  The motion controller 280 reads each speed control command of the ascending / descending speed control pattern GCP120 from the speed control pattern memory 282 at a predetermined control period in accordance with the motion activation command, and sends each speed control command to the drive control circuit 283. The drive control circuit 283 is based on each speed control command and the frequency of the rotation pulse from the encoder 85 so that the rotation speed of the lift motor 80 becomes the rotation speed Vg according to the lift speed control pattern GCP120 shown in FIG. The rotational speed of the lifting motor 80 is controlled.

  As shown in FIG. 17, the rotation speed of the lifting motor 80 is accelerated by the acceleration in the acceleration region GC1A from the time T0 immediately after the generation of the feed start signal SF. When the elapsed time T reaches the time point T1, the rotation speed of the elevating motor 80 is decelerated by the acceleration in the deceleration region GC1B. When the elapsed time T reaches time T3, the rotation of the lifting motor 80 is stopped. Between time T0 and time T3, the great 141 descends from the uppermost position and moves to the lowermost position. The upper surface of the great 141 reaches the position PR at the uppermost position on the outer peripheral surface of each paper feed roller at the time TA, and then descends toward the lowermost position.

  The roller motor control device 254 determines the starting time T2 of the acceleration region RC1 of the roller speed control pattern RCP120, and the phase difference stored in the program memory 262, corresponding to the sheet conveying speed in the control command information. Based on the set value DPP, a time TDP from time T0 to time T2 is calculated. The roller motor control device 254 does not issue a motion start command until the elapsed time T has elapsed by the time TDP. As a result, the drive control circuit 264 maintains the roller motors 90, 91, 102, and 103 in the stopped state from the time T0 immediately after the generation of the feed start signal SF to the time TDP.

  When the elapsed time T has elapsed by the time TDP, the roller motor control device 254 generates a motion start command and sends it to the motion controller 260. The motion controller 260 reads each speed control command of the roller speed control pattern RCP120 from the speed control pattern memory 263 at a predetermined control period in accordance with the motion start command, and converts each speed control command into a rotational speed control command for each roller motor. To the drive control circuit 264. Each speed control command is converted into a rotational speed control command for each roller motor based on the diameter Dr of each paper feed roller. The drive control circuit 264 sends each rotation speed control command and the encoder groups 100, 106, 112 so that the rotation speeds of the roller motors 90, 91, 102, 103 become the rotation speeds according to the roller speed control pattern RCP120 shown in FIG. , 113 based on the frequency of the rotation pulse from each encoder, the rotation speed of each roller motor is controlled.

  As shown in FIG. 17, when the elapsed time T reaches the time point T2, the rotation speed of each roller motor is accelerated by the acceleration in the acceleration region RC1. As a result, each paper feed roller in the stopped state starts to rotate. Since the time point T2 is later than the time point TA, when each paper feed roller starts to rotate, the lower surface of the corrugated cardboard sheet SH that is the bottom layer of the stacked cardboard sheets SH is in contact with each paper feed roller. The lower corrugated cardboard sheet SH is sent out in the feeding direction FD.

  The elevating motor 80 is maintained in a stopped state in accordance with each speed control command in the lower control region GC2 from time T3 to time T5. Thereafter, the elevating motor 80 is accelerated according to each speed control command in the acceleration region GC3A of the ascending variable speed region GC3 from time T5 to time T6, and decelerated in the ascending variable speed region GC3 from time T6 to time T7. Deceleration is performed in accordance with each speed control command in region GC3B. Between time T5 and time T7, the great 141 rises from the lowermost position and moves to the uppermost position. The upper surface of the great 141 reaches the uppermost position PR of the outer peripheral surface of each paper feed roller at the time point TB, and then rises toward the uppermost position. The elevating motor 80 is maintained in a stopped state in accordance with each speed control command in the upper control region GC4 from time T7 to time T9. In order to generate each speed control command from time T0 to time T9, the motion controller 280 outputs all speed control commands in the four regions GC1 to GC4 of the ascending / descending speed control pattern GCP120 as the first read operation. Read from the speed control pattern memory 263. All the speed control commands in the four regions GC1 to GC4 are used to feed the first cardboard sheet SH. In this embodiment, since the feeding speed is 120 sheets / minute, the time from time T0 to time T9 is 0.5 seconds.

  When the elapsed time T reaches the time T9, the lower management apparatus 210 receives the first detection signal SD from the rotational position sensor 190. In accordance with the detection signal SD, the lower-level management device 210 sends control command information including a synchronization command and a sheet conveyance speed to the drive control device 250 and the roller motor control device 254, and uses the control command information as a motion start command as a motion controller 280. Send to. The drive control device 250 continuously drives the main drive motor MT according to the sheet conveyance speed in the control command information, and rotates it at a rotation speed corresponding to the sheet conveyance speed.

  The motion controller 280 reads each speed control command of the ascending / descending speed control pattern GCP120 from the speed control pattern memory 282 at a predetermined control period in accordance with the motion activation command, and sends each speed control command to the drive control circuit 283. As the second read operation, the motion controller 280 reads all the speed control commands in the four areas GC1 to GC4 of the same ascending / descending speed control pattern GCP120 from the speed control pattern memory 282. All speed control commands in the four regions GC1 to GC4 are used to feed the second cardboard sheet SH. After time T9, the motion controller 280 repeatedly executes a control process similar to the control process from the time T0 to the time T9 in accordance with the motion activation command based on the detection signal SD.

  Each roller motor is accelerated to a rotational speed corresponding to a feeding speed of 120 sheets / min with acceleration in the acceleration region RC1 from time T2 to time T4. Thereafter, each roller motor is maintained at a rotational speed corresponding to the feeding speed in the constant speed region RC2 from time T4 to time T8. Each roller motor is decelerated from the rotational speed corresponding to the feeding speed by the acceleration in the deceleration region RC3 from time T8 to time T10. Each roller motor is maintained in the stop state in the stop region RC4 from time T10 to time T11. In order to generate each speed control command from time T2 to time T11, the motion controller 260 sends all speed control commands in the four regions RC1 to RC4 of the roller speed control pattern RCP120 as the first read operation. Read from the speed control pattern memory 263. All the speed control commands in the four regions RC1 to RC4 are used for feeding the first cardboard sheet SH. In this embodiment, since the feeding speed is 120 sheets / minute, the time from time T2 to time T11 is 0.5 seconds.

  The roller motor control device 254 generates a motion start command and sends it to the motion controller 260 at time T11 when time TDP has elapsed from time T9 when the synchronization command based on the detection signal SD is received.

  The motion controller 260 reads out each speed control command of the roller speed control pattern RCP120 from the speed control pattern memory 263 at a predetermined control period in accordance with the motion activation command, and sends each speed control command to the drive control circuit 264. As the second read operation, the motion controller 260 reads all speed control commands in the four regions RC1 to RC4 of the same roller speed control pattern RCP120 from the speed control pattern memory 263. All speed control commands in the four areas RC1 to RC4 are used to feed the second cardboard sheet SH. The motion controller 260 repeatedly executes a control process similar to the control process from the time T2 to the time T11 in accordance with the motion activation command generated based on the synchronization command after the time T11.

  The first corrugated cardboard sheet SH starts to be fed from time T2, and is separated from each paper feed roller at time TB. The distance at which the first corrugated sheet SH is fed by each sheet feeding roller is a distance corresponding to the area ARS indicated by hatching in FIG. 18, and is a distance according to the sheet length.

<Description of Lifting Speed Control Pattern GCP-1 According to Minimum Sheet Length>
The elevation speed control pattern GCP-1 according to the minimum sheet length will be described with reference to FIG. FIG. 19 is a timing chart showing a temporal relationship between the roller speed control pattern RCP120 and the elevation speed control pattern GCP120-1 when the corrugated cardboard sheet SH has the minimum sheet length. A lifting speed control pattern GCP120 shown in FIG. 17 is a lifting speed control pattern according to an intermediate sheet length between the minimum sheet length and the maximum sheet length. In the following description, the same or corresponding portions as those in the ascending / descending speed control pattern GCP120-1 shown in FIG. A roller speed control pattern RCP120 shown in FIG. 19 is the same pattern as the roller speed control pattern RCP120 shown in FIG.

  In the up / down speed control pattern GCP120-1 shown in FIG. 19, the upper surface of the grating 141 reaches the position PR at the top of the outer peripheral surface of each paper feed roller at the time TA, as in the up / down speed control pattern GCP120 shown in FIG. Then, it descends toward the lowest position. However, in the ascending / descending speed control pattern GCP120-1 shown in FIG. 19, the upper surface of the Great 141 is different from the ascending / descending speed control pattern GCP120 shown in FIG. 17, and is earlier than the time T7 shown in FIG. 17 and the time TB shown in FIG. In TB-1, the position PR reaches the uppermost position PR on the outer peripheral surface of each paper feed roller, and then rises toward the uppermost position. The end time point of the deceleration region GC3B of the ascending / descending speed control pattern GCP120-1 is earlier than the time point T7 shown in FIG.

<Description of Lifting Speed Control Pattern GCP-2 According to Maximum Sheet Length>
The elevation speed control pattern GCP-2 corresponding to the minimum sheet length will be described with reference to FIG. FIG. 20 is a timing chart showing a temporal relationship between the roller speed control pattern RCP120 and the elevation speed control pattern GCP120-2 when the corrugated board sheet SH has the maximum sheet length. In the following description, the same or corresponding portions of the lifting speed control pattern GCP120-2 shown in FIG. 20 are the same as or correspond to the lifting speed control pattern GCP120 shown in FIG. A roller speed control pattern RCP120 shown in FIG. 20 is the same pattern as the roller speed control pattern RCP120 shown in FIG.

  In the up / down speed control pattern GCP120-2 shown in FIG. 20, the upper surface of the great 141 reaches the position PR at the uppermost position of the outer peripheral surface of each paper feed roller at the time TA, similarly to the up / down speed control pattern GCP120 shown in FIG. Then, it descends toward the lowest position. However, in the ascending / descending speed control pattern GCP120-2 shown in FIG. 20, the upper surface of the great 141 differs from the ascending / descending speed control pattern GCP120 shown in FIG. 17 at a time later than the time T7 shown in FIG. 17 and the time TB shown in FIG. In TB-2, the position reaches the uppermost position PR on the outer peripheral surface of each paper feed roller, and then rises toward the uppermost position. The end point of the deceleration region GC3B of the elevation speed control pattern GCP120-2 is later than the end point T8 of the constant speed region RC2 of the roller speed control pattern RCP120. That is, the constant speed region RC2 of the roller speed control pattern RCP120 continues after the time TB-2 when the upper surface of the great 141 reaches the position PR, and before the end time of the deceleration region GC3B of the ascending / descending speed control pattern GCP120-2. The process ends at time T8.

<< Effects of the Embodiment >>
In the present embodiment, the motion conversion mechanism 140 includes a support mechanism 142 and a swing mechanism 143. The swing mechanism 143 converts the rotation of the lifting motor 80 in one direction into a swing motion of the swing member 172. The elevating connection shaft 173 rotates in both directions by a predetermined angle θs with the swinging motion of the swinging member 172. With the rotation in both directions, the support mechanism 140 moves the great 141 up and down. As a result, the motion controller 280 and the drive control circuit 283 only control the rotation of the lifting motor 80 in one direction, and it is not necessary to control the rotation position of the lifting motor in different rotation directions. It is possible to accurately control the feeding timing and the feeding amount of the sheet SH.

  In the present embodiment, the lower management apparatus 210 and the motion controller 280 calculate the elevation speed control pattern GCP120 based on the basic elevation patterns BGP1, BGP2, the sheet length, and the feeding speed. As a result, it is possible to cope with various orders in which the sheet length and the feeding speed are different compared to the configuration in which a variety of lifting speed control patterns corresponding to the sheet length and the feeding speed are stored in the storage unit in advance. Thus, it is possible to generate various lifting speed control patterns with a small amount of data and control commands.

  In the present embodiment, the subordinate management device 210 and the motion controller 280 move the ascending variable speed region GC3 in the axial direction of the elapsed time T with respect to the descending variable speed region GC1 of the ascending / descending speed control pattern GCP120, thereby processing order. The elevation speed control pattern GCP120 corresponding to the sheet length is created. As a result, compared to the conventional configuration in which the position of a mechanical element such as a lift control cam is adjusted, the period of the lower control region GC2 and the period of the upper control region GC4 are changed when the lift speed control pattern GCP120 is created. It is possible to easily and accurately change the lifting / lowering movement of the great 141 according to the sheet length of the order.

  In this embodiment, every time the rotational position sensor 190 detects a predetermined rotational position of the lifting drive shaft 170 and generates a detection signal SD, the lower management apparatus 210 sends a motion activation command to the motion controller 280 according to the detection signal. . When the motion controller 280 receives the motion activation command, the motion controller 280 generates each speed control command of the ascending / descending speed control pattern GCP120 every predetermined control cycle and sends it to the drive control circuit 283. As a result, it is possible to accurately synchronize the timing at which the elevating drive shaft 170 reaches the predetermined rotational position and the timing at which each speed control command of the elevating speed control pattern GCP120 is generated. In the present embodiment, the predetermined rotational position of the elevating drive shaft 170 is the rotational position of the elevating drive shaft 170 when the great 141 reaches the uppermost position, and therefore the elevating movement of the great 141 is maximized according to the elevating speed control pattern GCP120. This can be done accurately from the upper position.

  In the present embodiment, the ascending / descending speed control pattern GCP120 and the roller speed control pattern RCP120 are respectively determined such that the descending variable speed area GC1 of the ascending / descending speed control pattern GCP120 and the stop area RC4 of the roller speed control pattern RCP120 overlap at the control timing. . As a result, the large number of paper feed rollers 124 to 127 are stopped in the stop region RC4 of the roller speed control pattern RCP120, and the great 141 is stopped in the descending variable speed region GC1 of the ascending / descending speed control pattern GCP120. Since the lowermost corrugated paper sheet SH descends below the large number of paper feed rollers 124 to 127, when the lowermost corrugated cardboard sheet SH first comes into contact with the large number of paper feed rollers 124 to 127, there is no slippage between them. In addition, each cardboard sheet SH can be fed with higher accuracy.

  In the present embodiment, the motion controller 260 determines that the start phase of the acceleration region RC1 of the roller speed control pattern RCP120 is the start phase of the acceleration region GC1A of the ascending / descending speed control pattern GCP120 based on the phase difference setting value DPP and the feeding speed. From this, a time TDP of displacement in the horizontal axis direction of the elapsed time T is calculated. As a result, the phase relationship between each region of the roller speed control pattern RCP120 and each region of the ascending / descending speed control pattern GCP120 is maintained at a constant relationship regardless of the change in the feeding speed. The operation can be performed with high accuracy.

[Correspondence between Configurations of Present Invention and Embodiment]
The cardboard sheet feeding device 1 is an example of the cardboard feeding device of the present invention. The large number of paper feed rollers 124 to 127 is an example of a plurality of paper feed rollers of the present invention. The great 141 is an example of the lifting member of the present invention. The lifting motor 80 is an example of the drive motor of the present invention. The motion conversion mechanism 140 is an example of the motion conversion mechanism of the present invention. A combination of the lower management apparatus 210 and the motion controller 280 is an example of the elevation control unit of the present invention. The roller motors 90, 91, 102, and 103 are examples of the roller motor of the present invention. A combination of the roller motor control device 254 and the motion controller 260 is an example of the roller control unit of the present invention. The support mechanism 142, the lift drive shaft 170, the eccentric member 171, the lift connection shaft, and the swing member 172 are examples of the support mechanism, the drive shaft, the eccentric member, the connection shaft, and the swing member of the present invention. The ascending / descending speed control pattern GCP120, the descending variable speed area GC1, the lower control area GC2, the ascending variable speed area GC3, and the upper control area GC4 are the ascending / descending speed control pattern, the descending variable speed area, the lower control area, and the ascending variable speed of the present invention. It is an example of an area | region and an upper control area | region. The roller speed control pattern RCP120, the acceleration area RC1, the constant speed area RC2, the deceleration area RC3, and the stop area RC4 are examples of the roller speed control pattern, the acceleration area, the constant speed area, the deceleration area, and the stop area of the present invention. .

[Modification]
The embodiment of the present invention has been described above, but various modifications can be made by those skilled in the art without departing from the spirit of the present invention.

(1) In this embodiment, in the ascending / descending speed control pattern GCP120, the acceleration in the acceleration region GC1A, the acceleration in the deceleration region GC1B, the acceleration in the acceleration region GC3A, and the acceleration in the deceleration region GC3B are all determined to be the same acceleration. . However, the four accelerations need not all be the same. For example, the acceleration areas GC1A and GC3A may be different from the acceleration areas of the deceleration areas GC1B and GC3B. Further, the acceleration of the acceleration region GC1A and the deceleration region GC1B may be different from the acceleration of the acceleration region GC3A and the deceleration region GC3B.

(2) In the present embodiment, the lower-level management device 210 creates the order lifting pattern DGP based on the basic lifting patterns BGP1, BGP2 and the sheet length of the processing order. Thereafter, the motion controller 280 creates a lifting speed control pattern GCP120 based on the order lifting pattern DGP and the feeding speed. In the configuration of this embodiment, the lower management apparatus 210 having a relatively high processing capability is responsible for a part of the creation process of the ascending / descending speed control pattern GCP120, so that various ascending / descending speed control patterns GCP120 can be quickly and reliably obtained. Can be created. Instead of the configuration of this embodiment, a configuration in which the elevation speed control pattern GCP120 is created by the motion controller 280 alone may be used.

(3) In the present embodiment, the basic roller pattern BRP is a single pattern determined based on the maximum sheet length that can be processed by the corrugated cardboard box making machine 1, and is thus fixed in the basic roller pattern memory 261. It is a configuration to be stored. However, in order to cope with corrugated cardboard box making machines of various configurations, when the maximum sheet length determined by the structure of each corrugated cardboard box making machine is input from the operation panel, the subordinate management device 210 or the roller motor The controller 254 may be configured to create the basic roller pattern BRP based on the input maximum sheet length.

(4) In this embodiment, the motion controller 280 and the drive control circuit 283 execute the speed control of the lifting motor 80 in accordance with each speed control command of the lifting speed control pattern GCP120 and the frequency of the rotation pulse from the encoder 85. It is a configuration. Instead of this configuration, the motion controller 280 and the drive control circuit 283 may perform a position control that controls the rotational position of the lifting motor 80 in parallel with the speed control of the lifting motor 80. In this modification, the motion controller 280 sends each speed control command and each position control command for commanding the rotational position of the elevating motor 80 to the drive control circuit 283 at a predetermined control cycle. The rotation of the elevating motor 80 is controlled according to the frequency and the number of pulses of the rotation pulse from 85.

(5) In the present embodiment, the basic lift pattern memory 270 stores two basic lift patterns BGP1 and BGP2 in a fixed manner. When the sheet length of the processing order is such a small sheet length that the descending variable speed region and the ascending variable speed region overlap as shown by hatching in FIG. An order lift pattern DGP is created based on the basic lift pattern BGP1. On the other hand, if the sheet length of the processing order is a large sheet length such that the descending variable speed region and the ascending variable speed region are spaced apart as shown in FIG. Creates an order lifting pattern DGP based on the basic lifting pattern BGP2 shown in FIG. However, the configuration for creating the order lifting pattern DGP corresponding to the sheet length of the processing order is not limited to the configuration of the present embodiment. For example, in one modification, the basic lifting pattern memory 270 stores one basic lifting pattern in a fixed manner. The lower management apparatus 210 is configured to create the order lifting pattern DGP by changing the interval between the descending variable speed region and the ascending variable speed region of one basic lifting pattern according to the sheet length of the processing order. May be. In another modification, the lower management device 210 creates the order elevation pattern DGP based on the sheet length of the processing order, the period of the acceleration region and the deceleration region, and the acceleration without providing the basic elevation pattern memory. It may be configured to.

(6) In the present embodiment, the motion controller 260 determines that the start phase of the acceleration region RC1 of the roller speed control pattern RCP is the acceleration region GC1A of the ascending / descending speed control pattern GCP based on the phase difference set value DPP and the feeding speed. The time TDP that is displaced from the start phase in the horizontal axis direction of the elapsed time T is calculated. Instead of this configuration, the motion controller 260 sets a time that is equal to or longer than the period of the stop area RC4 of the roller speed control pattern RCP and is equal to or less than the period of the descending variable speed area GC1 of the ascending / descending speed control pattern GCP. The period may be calculated by multiplying the period or the period of the descending variable speed region GC1 by a predetermined coefficient.

(7) In the present embodiment, the creation of the roller speed control pattern RCP120 and the elevation speed control pattern GCP120 has been described by taking as an example the case where the sheet conveyance speed is a constant speed during execution of the processing order. However, when the sheet conveyance speed is changed to a plurality of speeds during execution of the processing order, the roller speed control pattern RCP and the elevation speed control are performed based on a plurality of feeding speeds respectively corresponding to the plurality of sheet conveyance speeds. A plurality of types of patterns GCP are created and stored in the speed control pattern memories 263 and 282.

(8) In the present embodiment, the motion conversion mechanism 140 includes a support mechanism 142 and a swing mechanism 143 in order to convert the rotation of one lift motor 80 in one direction into the lift movement of the great 141. However, the motion conversion mechanism 140 is not limited to the configuration of the present embodiment. For example, in the modification shown in FIG. 21, the motion conversion mechanism 140A includes two lifting motors 80A1 and 80A2 and two eccentric rotating bodies 300A1 and 300A2. Both eccentric rotating bodies 300A1 and 300A2 are respectively fixed to the two lifting drive shafts 301A1 and 301A2 and have circular outer peripheral surfaces that are eccentric from the rotation centers of both the lifting drive shafts. The rotary shafts of both lift motors 80A1 and 80A2 are coupled to both lift drive shafts 301A1 and 301A2 by known transmission means such as a transmission belt. The two outer peripheral surfaces of both eccentric rotating bodies 300A1 and 300A2 support the left end portion and the right end portion of the great 141 from below. The motion controller 280 and the drive control circuit 283 control the two lift motors 80A1 and 80A2 while synchronizing the rotations in one direction. The two eccentric rotating bodies 300A1 and 300A2 raise and lower the great 141 by the synchronous rotation of both the lifting motors 80A1 and 80A2. In the modification shown in FIG. 21, the arrangement posture of the great 141 in the left-right direction can be easily adjusted by adjusting the rotation phases of the eccentric rotating bodies 300A1 and 300A2. In the modification shown in FIG. 22, the motion conversion mechanism 140B includes two lifting motors 80B1 and 80B2, two rotating bodies 302B1 and 302B2, and two connecting rods 303B1 and 303B2. The two connecting pins 304B1 and 304B2 are fixed to both rotating bodies in a state of being eccentric from the rotation centers of the rotating bodies 302B1 and 302B2. The lower end portion of the connecting rod 303B1 is connected to the rotating body 302B1 by the connecting pin 304B1, and the upper end portion of the connecting rod 303B1 is connected to the left end portion of the great 141. The lower end portion of the connecting rod 303B2 is connected to the rotating body 302B2 by the connecting pin 304B2, and the upper end portion of the connecting rod 303B2 is connected to the right end portion of the great 141. The rotating shafts of both lifting motors 80B1 and 80B2 are connected to the rotating shafts of both rotating bodies 302B1 and 302B2 by known transmission means such as a transmission belt, respectively. The motion controller 280 and the drive control circuit 283 control the two lift motors 80B1 and 80B2 while synchronizing the rotation in one direction. The two connecting rods 303B1 and 303B2 move the great 141 up and down by the synchronous rotation of both the lifting motors 80B1 and 80B2. In the modification shown in FIG. 22, the frictional contact portion is reduced as compared with the modification shown in FIG. 21, so that the vertical movement of the great 141 can be maintained in a constant movement pattern even with long-term use.

DESCRIPTION OF SYMBOLS 1 Corrugated paper box making machine 2 Corrugated paper sheet feeding device 80 Lifting motors 90, 91, 102, 103 Roller motors 124 to 127 Feed roller 140 Motion conversion mechanism 141 Great 142 Support mechanism 170 Lifting drive shaft 171 Eccentric member 172 Oscillating member 173 Lifting connection shaft 190 Rotation position sensor 210 Lower level control device 254 Roller motor control device 260, 280 Motion controller 262, 281 Program memory 263, 282 Speed control pattern memory SH Corrugated cardboard sheet FD Feed direction RCP120 Roller speed control pattern GCP120 Lifting speed control pattern

Claims (9)

A plurality of paper feed rollers rotatable to feed the lowermost corrugated cardboard sheet of the laminated cardboard sheets;
An elevating member that can be raised and lowered with respect to a plurality of paper feed rollers;
A drive motor;
A motion conversion mechanism that converts the rotation of the drive motor in one direction into a motion for raising and lowering the elevating member, and transmitting the motion to the elevating member;
An elevating control unit that performs variable speed control of rotation in one direction of the drive motor according to the elevating speed control pattern,
The elevation control unit is a cardboard sheet feeding device that changes the elevation speed control pattern according to the sheet length of the cardboard sheet in the feeding direction.   The cardboard sheet feeding device according to claim 1, wherein the lifting control unit calculates a lifting speed control pattern based on a sheet length and a feeding speed of the cardboard sheet in the feeding direction.   Ascending / descending speed control patterns determined for causing the elevating member to perform one elevating motion include a lower control region for controlling the rotation of the drive motor to position the elevating member below the plurality of paper feed rollers, and a plurality of elevating speed control patterns. Controls the ascending / descending speed range including acceleration and deceleration of the drive motor to raise the elevating member located below the feed roller, and the rotation of the drive motor to position the elevating member above the multiple feed rollers The corrugated cardboard according to claim 1, further comprising: an upper control area that includes a lowering variable speed area that includes acceleration and deceleration of a drive motor for lowering a lifting member positioned above the plurality of paper feed rollers. Sheet feeding device.   The elevation control unit determines the elevation speed control pattern according to the sheet length so that the longer the sheet length of the corrugated cardboard sheet in the feeding direction, the longer the period of the lower control area and the shorter the period of the upper control area. The cardboard sheet feeding device according to claim 3, wherein a time interval between the ascending variable speed region and the descending variable speed region is changed. A roller motor that rotates a plurality of paper feed rollers;
A roller control unit that operates in synchronization with the variable speed control by the elevation control unit and controls the rotation of the roller motor in a variable speed according to the roller speed control pattern,
The roller controller changes the roller speed control pattern according to the maximum sheet length of the corrugated cardboard sheet that can be fed in the feeding direction and the feeding speed,
The roller speed control pattern determined to feed one cardboard sheet to a plurality of paper feed rollers includes a stop area where rotation of the roller motor is stopped, and from a stopped state to a predetermined rotation speed corresponding to the feed speed. 5. An acceleration area for accelerating the roller motor, a constant speed area for rotating the roller motor at a predetermined rotation speed, and a deceleration area for decelerating the roller motor from the predetermined rotation speed to a stop state. The cardboard sheet feeding device described in 1. The up / down control unit and the roller control unit overlap the lower control area of the up / down speed control pattern with the acceleration area and the constant speed area of the roller speed control pattern at the control timing, and the upper control area of the up / down speed control pattern and the roller speed control pattern Ascending / descending speed control pattern and roller speed control pattern are respectively determined so that the deceleration area overlaps at the control timing,
6. The corrugated cardboard sheet supply according to claim 5, wherein the acceleration at which the rotation of the roller motor is accelerated in the acceleration region of the roller speed control pattern is set to be larger than the acceleration at which the rotation of the roller motor is decelerated in the deceleration region of the roller speed control pattern. Feeding device. In the lower control area of the lifting speed control pattern, the lifting control unit stops the rotation of the drive motor to hold the lifting member at a lower position below the plurality of paper feed rollers, and in the upper control area of the lifting speed control pattern The rotation of the drive motor is stopped to hold the elevating member at an upper position above the plurality of paper feed rollers,
The roller control unit continues the constant speed region of the roller speed control pattern until the lowermost corrugated sheet is separated from the plurality of paper feed rollers when the elevating member rises from the lower position toward the upper position, and 7. The corrugated cardboard sheet feeding device according to claim 6, wherein the roller speed control pattern is determined so that the constant speed area ends before the end of the ascending / descending speed control pattern determined according to the maximum sheet length. . The motion conversion mechanism is
A drive shaft to which the rotation of the drive motor in one direction is transmitted and performs one rotation during one lifting movement of the lifting member;
An eccentric member formed eccentrically from the axis of the drive shaft and fixed to the drive shaft;
A support mechanism for supporting the elevating member to be movable up and down;
A connecting shaft connected to the support mechanism;
A swinging member fixed to the connecting shaft and engaged with the eccentric member and swinging about the connecting shaft;
The corrugated sheet feeding apparatus according to any one of claims 1 to 7, wherein the elevating member performs an elevating motion according to two opposite directions of rotation of the connecting shaft accompanying the rocking motion of the rocking member. A detection unit that detects the rotational position of the drive shaft and generates a position detection signal;
The corrugated sheet feeding apparatus according to claim 8, wherein the elevation controller controls the rotation of the drive motor in one direction in a variable speed in synchronization with the position detection signal from the detector.

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