JP2012171133A - Booklet page turning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a booklet page turning apparatus which can prevent a page from coming off from a vacuum pad without increasing a suction force of the vacuum pad.SOLUTION: The booklet page turning apparatus includes a degree-of-vacuum detecting means 13 which detects a degree of vacuum of the vacuum pad 10a at the time when a page of the booklet is lifted and a second control means 40 which determines that the page comes off from the vacuum pad 10a on the basis of detection of the degree of vacuum of a predetermined value or smaller by the degree-of-vacuum detecting means 13 and retrying a page turning action by sucking and lifting the page again by means of the vacuum pad 10a so that its secondary buckling deformation amount decreases.

Description

  Embodiments of the present invention relate to, for example, a booklet page turning apparatus that is provided in a booklet printing machine and automatically turns pages of a booklet.

  Some page turning apparatuses of this type enable page turning of a booklet formed by mixing high-rigidity pages and normal paper pages.

  When turning pages with this page turning device, first, the uppermost page of the booklet is sucked with a vacuum pad under a negative pressure. After this suction, the uppermost page is lifted along the rotation trajectory centering on the binding of the booklet by moving the vacuum pad. After the lifting, a contact roller having a scraping function is entered below the uppermost page. After this entry, the vacuum pad suction is released. After this release, the uppermost page is turned over by nipping and conveying the lowermost page of the booklet by the abutting roller and the conveying roller opposed to the abutting roller.

  According to this page turning apparatus, it is possible to turn a page with respect to a conveyed booklet from either the left or right side, regardless of the rigidity of the page.

  Further, in the case of lifting the uppermost page of the inner sheet where a plurality of sheets easily stick to each other with this page turning apparatus, the uppermost page of the inner sheet is lifted on a trajectory that is not a rotation trajectory around the binding stitch of the booklet. As a result, the intermediate paper is second buckled in an S-shape so that only the uppermost page of the intermediate paper can be separated.

  By the way, as described above, when the intermediate paper page is lifted with a vacuum pad to give secondary buckling (S-bending), not only the movement of the pad suction surface in the normal direction but also the pad suction is applied to the vacuum pad. The tangential movement and twisting motion of the surface is added. For this reason, a shearing force and a peeling moment are applied to the pad suction surface, which causes the page to be detached from the pad suction surface.

  Therefore, conventionally, a vacuum pad of a type in which the page does not easily come off from the pad suction surface is employed in advance. For example, by using a soft material with a thin pad thickness, it is easy to follow the buckling deformation of the inner paper.

  However, even if the measures described above are taken, the page may come off from the pad suction surface.

In particular,
(1) Immediately after replacing the vacuum pad with a new one.

  That is, when a new vacuum pad is stored in an unused state, the internal filler oozes out to the surface during that time, and an oxidized deterioration film is formed.

  When the vacuum pad is aged to some extent, the oxidized deterioration film on the new rubber surface disappears by rubbing against the paper surface, and the page does not come off from the pad suction surface.

(2) When the vacuum pad has been used for a long time and deteriorated (worn or cracked).

(3) This is the case when the stiffness of the booklet inside the booklet is large (out of specification).

  It is also conceivable that the vacuum force of the vacuum pad is increased or the pad diameter is increased to increase the suction force and prevent the removal of the suction.

  However, increasing the suction force of the vacuum pad induces a problem of attaching suction marks (kiss marks) to the inner paper. Furthermore, if the inner paper itself is air permeable (such as when the paper fibers are rough), it becomes a factor for sucking a plurality of sheets at a time, which is contrary to the purpose of separating one sheet.

JP 2009-279925 A

  The problem to be solved by the present invention is to provide a page turning device that can prevent the removal of the suction without increasing the suction force of the vacuum pad.

  In order to solve the above-described problem, the embodiment includes a conveying unit that conveys a booklet having a binding portion to a page turning position along a conveying path, and a vacuum that is pressed against a page of the booklet that is conveyed to the page turning position. A vacuum pad to be adsorbed, driving means for moving the vacuum pad to lift the booklet page in a direction to open a predetermined angle and then buckling it into an S-shape to separate it from other pages, and lifting the predetermined angle A contact roller that enters the lower side of the printed page, and after the contact roller enters the lower side of the page, the vacuum suction of the vacuum pad is released and the vacuum pad is retracted from the page. First control means for controlling the page so that the page is brought into contact with the abutting roller portion by transporting the booklet and the vacuum pad when the booklet is lifted Check the vacuum level of And determining that the page is detached from the vacuum pad based on the detection of a vacuum level equal to or lower than a predetermined value by the vacuum level detecting unit, and adsorbing the page again by the vacuum pad. And second control means for lifting the pager so as to reduce the amount of secondary buckling deformation and retrying the page turning operation.

The block diagram which shows the page turning apparatus of the booklet which is 1st Embodiment. The perspective view which shows the pinch roller of the page turning apparatus of FIG. 1, an impeller, and its drive system. The perspective view which shows the vacuum pad and its drive system of the page turning apparatus of FIG. The figure which shows the movement locus | trajectory of the vacuum pad of FIG. The block diagram which shows the drive control system of the page turning apparatus of FIG. The figure which shows the state by which the booklet was conveyed to the page turning position of the page turning apparatus of FIG. The figure which shows the state which the cover of the booklet conveyed to the turning position of FIG. 6 was lifted with the vacuum pad. The figure which shows the state which the pinch roller approached into the lower part side of the cover sheet lifted by the vacuum pad of FIG. The figure which shows the state in which a booklet is conveyed from the state which the pinch roller approached to the lower part side of the cover of FIG. FIG. 10 is a diagram illustrating a state in which a cover is brought into contact with a pinch roller and rolled down by conveying the booklet of FIG. 9. FIG. 11 is a diagram illustrating a state where the cover of FIG. 10 is completely rolled over and opened. FIG. 12 is a diagram illustrating a state in which the cover sheet completely turned over in FIG. 11 is lifted in a reverse turn direction by a vacuum pad. FIG. 13 is a diagram illustrating a state in which a pinch roller has entered the lower side of the cover that is lifted in FIG. FIG. 14 is a diagram illustrating a state where the cover is in contact with a pinch roller that has entered the lower side of the cover in FIG. 13. FIG. 15 is a diagram illustrating a state where the cover that is in contact with the pinch roller in FIG. 14 is largely rotated in the reverse turning direction. The figure which shows the state by which the vacuum pad was adsorb | sucked to the top page of the middle paper of a booklet. FIG. 17 is a view showing a state in which the inner paper that is lifted by moving the vacuum pad of FIG. 16 upward is buckled in an S shape. The block diagram which shows the negative pressure supply circuit of FIG. The graph which shows the change of the vacuum degree at the time of page adsorption | suction of the vacuum pump of FIG. The figure which shows the page adsorption | suction position of the vacuum pump of FIG. The figure which shows the page lifting height of the vacuum pump of FIG. The figure which shows the rotational speed of the impeller at the time of page turning retry operation.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a configuration diagram illustrating a booklet page turning apparatus according to a first embodiment.

  In the figure, reference numeral 1 denotes a transport path for transporting the booklet T. The transport path 1 includes a plurality of transport rollers 2a to 2d as transport means and a booklet T at predetermined intervals along the transport direction of the booklet T. Detection sensors 4a to 4d for optical detection are arranged. As shown in FIG. 2, the booklet T includes a high-rigidity cover Ta and a flexible intermediate paper Tc.

  Pinch rollers 2 a ′ and 2 d ′ are in rolling contact with the upper surface portions of the transport rollers 2 a and 2 d, and the transport rollers 2 b and 2 c are arranged at the page turning position 5. The transport rollers 2a to 2d are rotationally driven by a transport roller drive motor 26 shown in FIG.

  Abutment feed mechanisms 20A and 20B are disposed on the upper side of the transport rollers 2b and 2c, respectively. On the upper side of the page turning position 5, there is provided a page lifting detection sensor 19 for optically detecting a page attracted and lifted by a pair of upper vacuum pads 10a described later.

  Further, a page number detection sensor 24 for detecting the page number of the turned page is provided in the vicinity of the contact feed mechanism 20B.

  The above-described detection sensors 4a to 4d, page lift detection sensor 19 and page number detection sensor 24 are connected to a control unit 40 as first and second control means via a signal circuit as shown in FIG. .

  On the other hand, the contact feed mechanism 20A includes a pinch roller (second contact roller portion, presser roller) 21a. The pinch roller 21a is attached to the shaft 6 as shown in FIG. 2, and an impeller 22a is attached to the shaft 6 in the vicinity of the pinch roller 21a. The impeller 22a has a plurality of flexible tapping plates arranged radially on the peripheral surface portion, and the tapping plate is brought into contact with the end surface of the booklet T when rotating, so that the page on the lower side of the page to be struck is tapped off. Separated.

  FIG. 2 shows a drive system for the pinch roller 21a and the impeller 22a.

  The shaft 6 is rotatably supported by a support bracket 7, and one end side of the shaft 6 protrudes outward from the support bracket 7. The projecting portion of the shaft 6 is connected to a pinch roller drive motor (shown in FIG. 5) 9 via a drive belt 8, and the pinch roller 21a and the impeller 22a are moved in the forward and reverse directions by the drive of the pinch roller drive motor 9. Are driven to rotate.

  A guide body 20 a for guiding the conveyance of the booklet T is integrally attached to the support bracket 7. The support bracket 7 is supported by a parallel link mechanism 23a, and the parallel link mechanism 23a is rotated in the forward and reverse directions by a parallel link drive motor (shown in FIG. 5) 25. With the rotation of the parallel link mechanism 23a, the guide body 20a is moved together with the pinch roller 21a and the impeller 22a between a conveyance position close to the conveyance roller 2b and a retreat position obliquely above and to the left of the conveyance position. It has become.

  The contact feed mechanism 20B is configured in the same manner as the contact feed mechanism 20A described above. That is, a guide body 20b, a pinch roller (first abutting roller portion, presser roller) 21b, an impeller 22b, and a parallel link mechanism 23b are provided, and the guide body 20b, the pinch roller 21b, and the impeller 22b are used as the transport roller 2c. The position is moved between an adjacent transport position and a standby position obliquely above and to the right of the transport position.

  Further, a turning suction mechanism 10 is provided at the page turning position 5 described above.

  Hereinafter, the winding suction mechanism 10 will be described with reference to FIG.

  The winding suction mechanism 10 includes a pair of upper vacuum pads 10a disposed on the upper side through the conveyance path 1 and a pair of vacuum pads 10b disposed on the lower side.

  The pair of lower vacuum pads 10b on the lower side are arranged at a predetermined interval along the transport direction of the booklet T with the suction port facing upward, and face the lower surface side of the booklet T that has been transported immediately above. It is supposed to be.

  The pair of upper vacuum pads 10a on the upper side are attached to the support carriage 15 with a predetermined interval in a direction orthogonal to the conveyance direction of the booklet T with the suction port facing downward.

  A vacuum pump 12 is connected to the upper and lower vacuum pads 10a and 10b via a negative pressure supply circuit 11 described in detail later.

  When the vacuum pump 12 is driven, negative pressure is generated in the upper and lower vacuum pads 10a and 10b, and suction is performed when the booklet T faces the upper and lower vacuum pads 10a and 10b. The suction force W [N] of the upper and lower vacuum pads 10a and 10b is obtained by the following equation.

W = 0.1 × P × A / S
P: Vacuum pressure (gauge pressure) [-kPa]
A: Vacuum pad area [cm ² ]
S: Safety factor On the other hand, bent portions are formed on both side portions of the support carriage 15, and guide wheels 15a and 15b are respectively provided in the bent portions so as to be positioned vertically. Guide plates 16 are respectively disposed on both sides of the support carriage 15. Cam grooves 16a and 16b are formed on the guide plates 16 so as to be vertically positioned, and guide wheels 15a and 15b of the support carriage 15 are fitted into the cam grooves 16a and 16b.

  The lower guide wheel 15a is also fitted into the groove portion 17a of the drive link plate 17 as drive means via the cam groove 16a. The drive link plate 17 is connected to the drive shaft 17c, and the drive shaft 17c is spanned between the guide plates 16 and 16. A driving knob 26 a is attached to one end portion of the drive shaft 17 c, and a drive link plate drive motor 29 is connected to the other end portion via a drive pulley 27 and a drive belt 28.

  The shaft of the upper guide wheel 15b is connected to the hook portion 18a via a spring 18, and the support carriage 15 is elastically biased upward.

  When the drive link plate drive motor 29 is driven, the drive shaft 17c is rotated via the drive belt 28 and the drive pulley 27, and the drive link plate 17 is rotated in the forward and reverse directions (left and right directions). By this rotation, the guide wheels 15 a and 15 b are guided along the two cam grooves 16 a and 16 b of the guide plate 16 to move the support carriage 15.

  The drive link plate 17 points in the 12 o'clock direction in the initial state before the support carriage 15 is moved, and the upper vacuum pad 10a supported by the support carriage 15 is retracted to the upper retracted position.

  FIG. 4 shows the trajectory of the pad support carriage 15 that moves along the cam grooves 16 a and 16 b of the guide plate 16 at the page turning position 5 of the booklet T.

  M1 is the binding position of the booklet T at the page turning start position, and M2 is the binding position of the booklet T at the reverse page turning start position. Pn is the center position of the guide wheel 15a, and Qn is the center position of the guide wheel 15b.

  The position and direction of the support carriage 15 are determined at two points of the center positions Pn and Qn of the guide wheels 15 a and 15 b, and the upper vacuum pad 10 a moves in conjunction with the support carriage 15. That is, between P1 and P2 and between Q1 and Q2 in the cam grooves 16a and 16b of the guide plate 16 is an arc centered on M1, during that time, the upper vacuum pad 10a is bound on the cover of the booklet T around M1. It will move in line with the lifting motion around the center of rotation.

  In reverse page turning, the shape of the cam grooves 16a and 16b of the guide plate 16 and the movement of the upper vacuum pad 10a are also symmetric with respect to M2.

  Further, between P0 and P2, a circular arc that smoothly connects the curves symmetrically developing P1 and P2 is formed, while between Q0 and Q2, the cam groove 16b of the guide plate 16 recedes linearly in the target axis direction. It is formed to do.

  Therefore, the support carriage 15 reduces the inclination until then, and when the center positions of the guide wheels 15a and 15b become P0 and Q0, the support carriage 15 returns to the vertical position and becomes the upper retreat position (initial position) of the upper vacuum pad 10a.

  The drive link plate 17 that moves the guide wheel 15a around the drive shaft (rotation center) 17c points in the 12 o'clock direction at this time, and the support carriage 15 can be moved symmetrically in the clockwise and counterclockwise directions. As a result, the maximum retraction position in the page turning operation of the upper vacuum pad 10a corresponds to the turning start position in the reverse page turning operation, so that the page turning and the reverse page turning can be performed in a compact range.

  Note that the actual binding position of the booklet T and the M1 and M2 positions deviate from each other depending on the thickness of the booklet T, the binding method of the booklet T, the placement of high-rigidity pages in the booklet T, or the variation in the page turning start position due to the conveying operation. Sometimes. In the cover lifting operation of the booklet T, the trajectory of the upper vacuum pad 10a is not ideal and deviates, but the lifting angle is as small as less than 45 degrees, and between the booklet T and the upper and lower vacuum pads 10a and 10b. It doesn't matter much because there is a play that can move to balance. This play is due to the elastic deformation of the vacuum pads 10a and 10b and the elastic deformation near the booklet binding.

  FIG. 5 is a block diagram showing a drive control system of the page turning apparatus described above.

  As described above, the detection sensors 4a to 4d, the page lift detection sensor 19, and the page number detection sensor 24 are connected to the control unit 40 as the first and second control means via the signal circuit. The control unit 40 is connected to the drive motors 9, 25, 26, 29 for the pinch roller, the parallel link, the transport roller, and the drive link plate, and the vacuum pump 12 through a control circuit. ing.

  The control unit 40 receives the detection signals from the detection sensors 4a to 4d, the page lifting detection sensor 19, and the page number detection sensor 24, and the pinch rollers 21a and 21b, the impellers 22a and 22b, and the parallel link mechanism 23a. , 23b, transport rollers 2a to 2d, drive link plate 17, and vacuum pads 10a, 10b are controlled.

  Further, vacuum switches Sp and Ss of a pressure gauge 13 constituting the negative pressure supply circuit 11 are connected to the control unit 40 via a signal circuit, and a guide display unit 41 is connected to the control unit 40.

  The control unit 40 retries the page turning operation as will be described in detail later based on whether the vacuum switches Sp and Ss of the pressure gauge 13 are turned on or off, and causes the guide display unit 41 to display deterioration information, replacement information, and the like of the vacuum pump 10a. Is displayed.

  Next, the page turning operation of the booklet T will be described with reference to FIGS.

  As shown in FIG. 6, the booklet T is conveyed rightward along the conveyance path 1 by the rotation of the conveyance roller 2a in the direction of the arrow. When the booklet T is conveyed to the detection sensor 4b and detected by this conveyance, the control unit 40 rotates the pinch roller 21a and the impeller 22a in the direction of the arrow and operates the parallel link mechanism 23a. By the operation of the parallel link mechanism 23a, the movable guide 20a is moved from the retracted position together with the pinch roller 21a and the impeller 22a to the transport position, the booklet T is sandwiched between the transport roller 2b and the pinch roller 21a, and further transported in the right direction. To do.

  When the leading end of the booklet T is detected by the detection sensor 4c by this conveyance, the conveyance roller 2b and the pinch roller 21a are reversed by a predetermined number of pulses, the booklet T is reversely fed, and stops at a predetermined page turning position 5. Is done.

  After that, as shown in FIG. 7, the parallel link mechanism 23a is rotated in the counterclockwise direction, and the movable guide 20a is moved upward together with the pinch roller 21a and the impeller 22a from the transport position and retracted.

  On the other hand, at this time, the vacuum pump 12 of the negative pressure supply circuit 11 is operated to generate a negative pressure in the upper and lower vacuum pads 10a and 10b, and the lower vacuum pad 10b is placed on the lower surface side of the booklet T as shown in FIG. It is pressed and held by suction. Further, at this time, the drive link plate drive motor 29 shown in FIG. 3 is operated to rotate the drive arm plate 17 in the clockwise direction, and the upper vacuum pad 10a is pressed against the cover Ta of the booklet T to suck the cover Ta. .

  After this suction, as shown in FIG. 8, the drive arm plate 17 is rotated in the reverse direction (counterclockwise), and the upper vacuum pad 10a keeps the cover Ta while adhering to the locus of the cam groove 16a of the guide plate 16. Move upward along.

  Thereby, the cover Ta of the booklet T is lifted around the binding Tb of the booklet T without changing the suction state with the upper vacuum pad 10a. The cover Ta of the booklet T is only lifted around the binding Tb of the booklet T, and is not given any bending deformation force. Therefore, the rigidity of the page does not affect the turning operation.

  In this way, when the cover Ta of the booklet T is lifted and lifted to a predetermined position, the page lift detection sensor 19 detects it. Based on this detection, the control unit 40 moves the movable guide 20b from the retracted position to the transport position together with the rotating pinch roller 21b and the impeller 22b. At this time, the plurality of lower middle sheets that are lifted by lifting the cover Ta of the booklet T are knocked down by the hitting plate of the impeller 22b, and the pinch roller 21b enters the page immediately below the cover Ta.

  Thereafter, an operation valve (not shown) is closed by the control unit 40, and the suction of the upper vacuum pad 10a is stopped. Next, as shown in FIG. 9, the drive link plate 17 is returned to the initial timepiece 12 o'clock direction to return the upper vacuum pad 10a to the upper retracted position.

  After that, the booklet T is nipped and conveyed in the right direction by the rotation of the conveying roller 2c and the pinch roller 21b, and stopped when detected by the booklet detection sensor 4d. Thereby, the cover Ta of the booklet T comes into contact with the pinch roller 21b.

  At this time, the drive link plate 17 is rotated counterclockwise from the retracted state, and the upper vacuum pad 10a is moved so as to be retracted from the range in which the cover Ta of the booklet T rolled up is retracted as shown in FIG. . At this time, the right end of the booklet T is already nipped between the transport roller 2d and the pinch roller 2d 'and can be transported, and the movable guide 20b is returned to the retracted position.

  From this state, the transport roller 2d is rotated, and the cover Ta of the booklet T that has been rolled up is completely rolled down as shown in FIG. 11 with no interfering parts nearby. Therefore, the operation can be completed here without depending on the rigidity of the page.

  In this conveyance, the page number recorded on the cover Ta on which the booklet T is opened is scanned by the page number detection sensor 24. The scan information is transmitted to the control unit 40, and the control unit 40 determines whether or not the turning operation is performed according to the program based on the transmitted scan information, and determines that the turning operation is not performed according to the program. If so, repeat the beat operation.

  If it is determined that the page turning operation has been performed, the booklet T is sent to the subsequent process for processing, and after this processing, the booklet T is sent back to the page turning position 5 again as shown in FIG. . From this state, as shown in FIG. 12, the upper vacuum pad 10a attracts and lifts the cover Ta, and when the lifted cover Ta is detected by the page lift sensor 19, the movable guide 20a is pinched as shown in FIG. It moves rightward together with the roller 21a and the impeller 22a and enters the lower side of the cover Ta. After that, as shown in FIG. 14, the booklet T is conveyed leftward by the rotation of the conveying rollers 2b, 2c, and 2d in the direction of the arrow, and the cover sheet Ta is rotated in the closing direction by contacting the pinch roller 21a. . Further, as the booklet T is conveyed leftward as shown in FIG. 15, the cover Ta is rotated and closed in the closing direction, and the page closing operation is completed. At the time of this page closing operation, the upper vacuum pad 10a is retracted from the standby position to the lower right so that the cover Ta that rotates greatly in the closing direction does not come into contact.

  Next, the page turning operation of the flexible intermediate paper Tc of the booklet T will be described.

  First, as shown in FIG. 16, when the booklet T with the cover Ta opened reaches the page turning position 5, the upper vacuum pad 10a is pressed against the upper surface of the middle paper Tc, and the lower vacuum pad 10b is placed on the booklet T. It is pressed against the lower surface and held by suction.

  After this suction, as shown in FIG. 17, the upper vacuum pad 10a is moved upward, and the middle paper Tc of the booklet T is lifted. The lifted intermediate paper Tc abuts on the shaft 17c and is buckled into an S-shape, and separates the lower intermediate paper Tc from the adsorbed intermediate paper Tc. The lifted intermediate paper Tc is turned over by the same operation as the turning operation of the cover sheet Ta and sent to the subsequent process for processing. After this processing, the intermediate paper Tc is sent back to the page turning position 5 again. Closed.

  FIG. 18 shows the negative pressure supply circuit 11 described above.

  The upper vacuum pad 10a is connected to the suction side of the vacuum pump 12 of the negative pressure supply circuit 11 via a branch part 31a, a connection part 31d, a filter 31e, and a branch part 31b. The lower vacuum pad 10b is connected to the suction side of the vacuum pump 12 via a branch part 31a, a solenoid valve 31f, a filter 31g, a connection part 31h, and a branch part 31c.

  Further, a pressure gauge 13 as a vacuum degree detecting means is connected to the branch part 31a, and the pressure gauge 13 is provided with a vacuum switch Sp and a vacuum switch Ss as shown in FIG. The vacuum switch Sp and the vacuum switch Ss are connected to the control unit 40, and a guide display unit 41 is connected to the control unit 40. An exhaust passage 38 having a silencing function is connected to the exhaust side of the vacuum pump 12.

  FIG. 19 is a graph showing a change in the degree of vacuum of the upper vacuum pad 10a during the page turning operation.

  When the degree of vacuum at the time of suction of the upper vacuum pad 10a exceeds the threshold value Vp, the vacuum switch Sp of the pressure gauge 13 is turned on. When the degree of vacuum at the time of suction exceeds the threshold value Vs, the vacuum switch Ss of the pressure gauge 13 is turned on. Turn on. The threshold value Vz is an adsorption limit value, and the lifting of the page itself is possible if it is greater than or equal to the adsorption limit value Vz.

  For example, when the threshold value Vz is set to 50 kPa, and the ideal adsorption state (pump maximum vacuum level) without deterioration and air leakage is set to 75 kPa, the threshold value Vp is set to 70 kPa and the threshold value Vs is set to 60 kPa. Set the value.

  When the vacuum degree of the upper vacuum pad 10a exceeds the threshold value Vs and the vacuum switch Ss of the pressure gauge 13 is turned on at the start of the page turning operation, the control unit 40 executes a series of turning operations. If the vacuum switch Ss is turned off during this series of turning operations, it is determined that the intermediate paper Tc has come off from the upper vacuum pad 10a, and control is performed so as to shift to a turning retry operation.

  Further, the control unit 40 counts the number of times the vacuum switch Sp is turned off during a series of turning operations, and the ratio of the number of times the vacuum switch Sp is turned off to the cumulative number of turning times or the number of turning times of the day. Is monitored over a specified value (eg, 1%). Then, the control unit 40 is programmed to cause the guidance display unit 41 to guide and display a decrease in vacuum degree (some degradation) when the ratio of the number of times the vacuum switch Sp is turned off exceeds a specified value.

  Further, at the start of the page turning operation, the control unit 40 does not exceed the threshold value Vs, the vacuum switch Ss remains off, and the page turning operation can be performed even if the specified number of retry operations are performed. If not, an error is displayed on the guidance display unit 41 to prompt the user to replace the vacuum pad 10a or check each part. After these measures are taken, the page turning device is returned.

  Actually, if the degree of vacuum is equal to or higher than the threshold value Vz, the page turning operation is possible. Therefore, if the threshold value Vs is set closer to the threshold value Vz, it can be operated to the limit. Since the form is a prior prediction, it has been described in the above flow.

  On the other hand, if the vacuum switch Ss is turned off during a series of page turning operations, it is determined that the intermediate paper Tc has come off from the upper vacuum pad 10a as described above, and a transition is made to the page turning retry operation. The control unit 40 adjusts the page turning parameters so as to reduce the amount of deformation of the secondary buckling of the middle paper Tc of the booklet T so as to prevent the occurrence of page misalignment.

  In the first retry operation, the controller 40 repeats the retry operation when an out-of-page occurs again, and adjusts the parameter every time the retry operation is performed to reduce the deformation amount of the secondary buckling. Go. The retry operation is repeated up to a specified number of times.

  A method for reducing the amount of secondary buckling deformation of the intermediate paper Tc of the booklet T during the retry operation is as follows.

  FIG. 20 shows the suction position of the upper vacuum pad 10a. The suction position X0 indicates a normal suction position, the suction position X1 indicates a suction position at the time of the first retry operation located closer to the leading end of the booklet T than the suction position X0, and the suction position X2 is from the suction position X1. Also, the suction position at the time of the second retry operation located on the front end side of the booklet T is shown.

  As the suction position of the upper vacuum pad 10a moves from the position X0 toward the front end side of the booklet T, the deformation amount of the secondary buckling of the intermediate paper Tc becomes smaller, and the page off from the upper vacuum pad 10a becomes difficult to occur.

  FIG. 21 shows the lifting height P of the intermediate paper Tc by the upper vacuum pad 10a, the lifting speed U of the intermediate paper Tc, and the pressing force F of the binding portion Tb of the booklet T by the pinch roller 21a.

  The lifting height P0 of the middle paper Tc indicates the lifting height of the normal middle paper Tc, and the lifting height P1 indicates the lifting height of the middle paper Tc during the first retry operation. The lifting height P2 indicates the lifting height of the middle sheet during the second retry operation, which is lower than that during the first retry operation, and the lifting height PH indicates the lifting height of a hard page such as a cover. Show.

  As the lifting height P of the intermediate paper Tc is lower, the amount of deformation of secondary buckling of the intermediate paper Tc becomes smaller, and the page off from the upper vacuum pad 10a is less likely to occur.

  Further, as the lifting speed U of the intermediate paper Tc is slower, the deformation amount of the secondary buckling of the intermediate paper Tc becomes smaller, and the page off from the upper vacuum pad 10a is less likely to occur.

  Further, the pressing force F0 of the binding portion Tb of the booklet T indicates the pressing force in the normal state, F1 indicates the pressing force in the first retry operation that is weaker than the pressing force in the normal time, and P2 is 1 The pressing force during the second retry operation is weaker than the pressing force during the second retry operation.

  The weaker the pressing force F of the binding portion Tb of the booklet T, the smaller the amount of deformation of the secondary buckling of the intermediate paper Tc, and the page off from the upper vacuum pad 10a is less likely to occur.

  By the way, if the deformation amount of the secondary buckling of the above-mentioned intermediate paper Tc is reduced, there arises a problem that the single sheet separation performance is deteriorated.

  Therefore, the control unit 40 adjusts the parameters so as to enhance the scraping function by the impellers 22a and 22b, which is another single sheet separation function, so that the single sheet separation performance is maintained well.

  A method for enhancing the page scraping function by the impellers 22a and 22b is as follows.

  FIG. 22 shows the contact time T of the impellers 22a and 22b against the intermediate paper Tc lifted by the upper suction pad 10a and the rotational speed W of the impellers 22a and 22b.

  The contact time T0 of the impellers 22a and 22b indicates the contact time of the impellers 22a and 22b at the normal time, the contact time T1 indicates the contact time at the first retry operation longer than the normal time, The contact time T2 indicates a contact time during the second retry operation that is longer than that during the first retry operation. The longer the contact time between the impellers 22a and 22b, the better the single sheet separation performance.

  The rotational speed W0 of the impellers 22a and 22b indicates the rotational speed of the impellers 22a and 22b at the normal time, the rotational speed W1 indicates the rotational speed at the first retry operation faster than the normal time, and the rotational speed W2 is The rotation speed at the time of the second retry that is faster than that at the time of the first retry operation is shown. As the rotational speed of the impellers 22a and 22b increases, the single sheet separation performance improves.

  In addition to adjusting the contact time T of the impellers 22a and 22b with respect to the intermediate paper Tc and the rotational speed W of the impellers 22a and 22b, for example, the pinch roller 21a that presses the binding portion Tb of the booklet T is moved up and down. By operating, the upper surface of the S-shape of the intermediate paper Tc may be hit to promote separation of one sheet.

  This operation addition can also be applied to the case where it is determined that even if the above-described retry operation is repeated, two pages are turned up and one sheet cannot be separated by page number detection by the detection sensor 24 after the page turning operation. .

  For example, when it is determined that the booklet T is an irregular booklet that has a large edge burr at the edge of the inner paper Tc and the inner papers are easy to stick to each other, the subsequent page turning process of the booklet T (turning or turning over another page) There may be applications such as adding this operation in advance.

  On the other hand, when the upper vacuum pad 10a is replaced with a new one, the control unit 40 sets in advance the conditions incorporated during the above-described retry operation, and performs a predetermined number of page turnings under these conditions. It is designed to control aging.

  Next, a page turning retry operation will be described.

  When the vacuum degree of the upper vacuum pad 10a falls below the threshold value Vs and the vacuum switch Ss is turned off during the series of page turning operations of the middle paper Tc of the booklet T described above, the control unit 40 starts from the upper vacuum pad 10a. It is determined that the intermediate paper Tc has come off, and the page turning operation by the upper vacuum pad 10a is retried.

  At the time of the retry operation, at least one of the lifting height P, the lifting speed U, the suction position X, and the pressing force of the binding portion Tb of the booklet T by the upper vacuum pad 10a is variably adjusted.

  That is, the lifting height P of the intermediate paper Tc is lowered, the lifting speed U is decreased, the suction position X is moved to the front end side of the booklet T, and the booklet T is bound as compared with the normal operation. The pressing force of the portion Tb is reduced. Thereby, the deformation amount of the secondary buckling of the booklet T can be reduced, and the intermediate paper Tc is hardly detached from the upper vacuum pad 10a.

  Further, during the retry operation, the amount of deformation of the secondary buckling of the intermediate paper Tc is smaller than that during the normal operation, so that the single sheet separation performance is degraded. Therefore, at this time, the contact time of the impellers 22a and 22b with respect to the intermediate paper Tc is increased, or the rotational speed of the impellers 22a and 22b is increased.

  Thereby, the separation performance of the single sheet Tc by the impellers 22a and 22b can be enhanced, and the decrease in the separation performance of the single sheet based on the decrease in the secondary buckling deformation amount of the booklet T can be compensated. .

  Even if this retry operation is performed, when the degree of vacuum of the upper vacuum pad 10a becomes equal to or lower than the threshold value Vs and the vacuum switch Ss is turned off, the control unit 40 again tries the beat operation.

  The amount of deformation of the secondary buckling of the booklet T is adjusted to be smaller every time the retry operation is repeated, and the single sheet separation performance of the impellers 22a and 22b is adjusted to be further increased.

  This retry operation is continuously repeated until the degree of vacuum of the upper vacuum pad 10a exceeds the threshold value Vs and the vacuum switch Ss is turned on.

  Next, a case where a new upper vacuum pad is used will be described.

  When the upper vacuum pad 10a is replaced with a new one, the control unit 40 performs control so as to perform a predetermined number of page turning operations under the conditions including the parameters for the retry operation described above in advance.

  Accordingly, even if the rubber surface of the new upper vacuum pad 10a is covered with the oxidized deterioration film, it is possible to prevent the page from being removed from the upper vacuum pad 10a.

  In addition, after sufficiently aging (using) the upper vacuum pad 10a, the oxidized deterioration film on the rubber surface of the upper vacuum pad 10a disappears by rubbing against the page paper surface, and there is no page off from the pad suction surface. Return to normal turning condition and continue turning pages.

  Next, the deterioration prediction of the upper vacuum pad 10a and the replacement guidance display will be described.

  As the number of page turning operations (the number of processed booklets) increases, the degree of deterioration of the upper vacuum pad 10a also increases. Accordingly, as shown in FIG. 19, when the degree of vacuum of the upper vacuum pad 10a falls below the threshold value Vp at the number N1 of turning operations, the vacuum switch Sp is turned off. The control unit 40 monitors whether the cumulative number of page turning of the page turning device or the ratio of the number of times the vacuum switch Sp is turned off to the number of page turning of the day exceeds a specified value (for example, 1%). If the specified value is exceeded, the guidance display unit 41 is caused to display a guidance for a decrease in the degree of vacuum (some deterioration). In this reduced degree of vacuum, the page turning operation is still possible, but the upper vacuum pad 10a is further deteriorated and the degree of vacuum cannot exceed the threshold value Vs at the start of the page turning operation (vacuum switch). If Ss is off), the page turning operation cannot be performed even if the predetermined number of retry operations are performed. In this situation, the control unit 40 displays an error on the guidance display unit 41 to prompt replacement of the upper vacuum pad 10a and inspection of each unit. After taking these measures, the device is returned.

  As described above, according to this embodiment, when the intermediate paper Tc is detached from the upper vacuum pad 10a during the turning operation of the intermediate paper Tc, the S-shaped buckling deformation amount of the intermediate paper Tc is reduced. Thus, since the page turning operation is retried, it is possible to prevent the page from being removed from the vacuum pad 10a without increasing the suction force of the upper vacuum pad 10a.

  When a new upper vacuum pad is used, a predetermined number of page turning operations are performed under conditions including parameters for retry operation in advance, so that the rubber surface of the new upper vacuum pad 10a is covered with an oxidized deterioration film. Even if it is broken, it is possible to prevent the page off from the upper vacuum pad 10a.

  Further, when the cumulative number of page turning of the page turning device or the ratio of the number of times the vacuum switch Sp is turned off with respect to the number of page turning of the day exceeds a specified value (for example, 1%), a guidance display unit is displayed. Since the lowering of the degree of vacuum (some deterioration) is displayed as a guide on 41, preparations for exchanging with a new upper vacuum pad can be made in advance.

  When the vacuum level of the suction pad 10a cannot exceed the threshold value Vs (the vacuum switch Ss remains off) at the start of the page turning operation, an error is displayed on the guidance display unit 41, and the upper vacuum Since replacement of the pad 10a and inspection of each part are promoted, replacement work and inspection work can be performed immediately.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Conveyance path, T ... Booklet, Tb ... Booklet binding part, 2a-2d ... Lower conveyance roller (conveyance means), 5 ... Page turning position, 10a ... Upper vacuum pad, 10b ... Lower vacuum pad, 17 ... drive link plate (drive means), 21a, 21b ... pinch rollers (contact roller section, presser roller), 22a, 22b ... impeller, 40 ... control section (first and second control means), 13 ... Pressure gauge (vacuum degree detection means), 22b ... impeller, 41 ... guidance display part.

Claims (7)

Conveying means for conveying a booklet having a binding portion to a page turning position along the conveying path;
A vacuum pad that is pressed against the page of the booklet conveyed to the page turning position and vacuum-sucked;
A driving means for separating this from the other pages by moving the vacuum pad and lifting it at a predetermined angle in the direction of opening the page of the booklet and causing it to be second buckled in an S-shape;
A contact roller that enters the lower side of the page lifted by the predetermined angle;
After the abutting roller enters the lower side of the page, the vacuum suction of the vacuum pad is released and the vacuum pad is retracted from the page to the retracted position, and then the booklet is conveyed to transport the booklet. A first control means for controlling so as to come into contact with the contact roller portion;
A degree of vacuum detecting means for detecting the degree of vacuum of the vacuum pad at the time of holding the booklet page;
Based on the fact that the degree of vacuum detection means detects a degree of vacuum below a predetermined value, it is determined that the page has come off from the vacuum pad, and the page is again adsorbed by the vacuum pad and its amount of secondary buckling deformation. And a second control means for retrying the page turning operation by lifting the page so as to reduce the page turning operation.   The booklet page turning device according to claim 1, wherein at the time of the retry operation, at least one of a lifting height of the page, a lifting speed, and a suction position with respect to the page by the vacuum pad is variably adjusted. . A presser roller that holds the closed portion of the booklet conveyed to the page turning position;
2. The booklet page turning apparatus according to claim 1, wherein the pressing force of the pressing roller is variably adjusted during the retry operation. An impeller for separating the page by contacting the end face of the page lifted by the vacuum pad;
2. The booklet page turning apparatus according to claim 1, wherein, during the retry operation, the contact time of the impeller with respect to the page and the rotational speed of the impeller are variably adjusted.   4. The booklet page turning apparatus according to claim 3, wherein the page lifted by the vacuum pad is hit by the pressing roller.   2. The booklet page turning apparatus according to claim 1, wherein when the vacuum pad is new, the page turning operation is started in advance under the same conditions as in the retry operation.   The lowering of the degree of vacuum is guided and displayed based on the number of times the degree of vacuum detected by the degree-of-vacuum detecting means falls below a predetermined value, and the degree of vacuum is further reduced to a threshold value. 2. The booklet page turning apparatus according to claim 1, further comprising a guide display unit that guides and displays replacement of the vacuum pad based on the following.

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