JPH0362150B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) This invention provides a transfer cylinder rotatably provided between a supply cylinder and a delivery cylinder, and a plurality of sets of gripping claws on the transfer cylinder for gripping sheets. It is supported so that it can be opened/closed and reversed, and both gripping claws grip the trailing edge of the sheet on the supply cylinder, and as the transfer cylinder rotates, the sheet is moved onto the transfer cylinder while being reversed. The present invention relates to a sheet-fed rotary printing machine, in which the sheet-fed sheet is turned over and then transferred to the delivery cylinder.

(Prior art) In the transfer cylinder of the paper sheet transfer and reversal device disclosed in Japanese Patent Publication No. 50-24642 published on August 18, 1975, a single carrier shaft rotatably supported on the transfer cylinder is used. A plurality of pairs of grippers are provided for gripping the paper sheet, one gripper is fixed to the carrier shaft, and the other gripper is swingably supported. Each swing gripper is provided with a control finger, and each finger engages a roller of a plurality of actuating levers mounted on a control shaft extending parallel to the carrier shaft. Opening and closing motions are applied to each swing gripper based on the engagement between the roller and the control finger.

However, the structure of this conventional paper sheet transfer/reversing device requires the same number of operating levers and rollers as the swing gripper, which increases the number of parts and makes the structure complicated. In addition, in order to operate each swing gripper at the same timing, it is necessary to precisely match the engagement between each control finger and each roller, which causes the inconvenience of tedious assembly and adjustment work. .

In the flipping device for a double-sided printing press disclosed in Japanese Patent Publication No. 56-2017 published on January 17, 1982, a flipping cylinder has a gripping nail shaft and a gripping nail tube inserted on the outside thereof. They are each rotatably supported on the same axis, and one gripping claw finger is fixed to the gripping claw shaft, and the other gripping claw finger is fixed to the gripping nail tube. Separate control members including cams, gears, etc. are operatively connected to the gripping claw shaft and the gripping nail tube, so that the gripping claw fingers are rotated on the same axis by different drive systems. It's getting old.

However, according to this configuration, the gripping claw shaft and the gripping claw tube are each driven separately, so during double-sided printing, the gripping claw fingers that grip the trailing edge of the sheet are turned over and the sheet is removed. When turning over the
It is necessary to precisely match the rotation angles of both jaw fingers. Therefore, the cam shape of each control member requires high precision, which not only increases costs, but also causes the problem that the sheet is held unevenly due to differences in the backlash of each gear. It was hot.

Moreover, since the gripping nail tube is rotatably loosely fitted to the gripping nail shaft, a clearance naturally exists between the two. This clearance causes a deviation in the gripping positions of the two gripping fingers when gripping a sheet, which has a negative effect on printing results, particularly when multicolor printing is performed by single-sided printing. Therefore, in this conventional everting device, in order to eliminate the clearance, it is necessary to interpose a large number of bearings along the axial direction between the gripping nail shaft and the gripping nail tube. Assembling and manufacturing the parts is very troublesome, leading to high costs.

Furthermore, in the conventional paper sheet transfer/reversing device described above, the center of rotation of the swing gripper is located outside the circumferential line of the transfer cylinder, and in the conventional paper sheet turning device for double-sided printing presses, the rotation center of the swing gripper is located outside the circumference of the transfer cylinder. The center of rotation is located on the circumference of the inside-out cylinder.
For this reason, in both cases, when the grippers or jaws are released, the tip of the gripper or jaw is more free than when the center of rotation is located inside the circumference of the transfer cylinder or the turning cylinder. The distance away from the leading edge of the sheet becomes shorter. Therefore, in order to avoid interference between the leading edge of the sheet and the tip of the gripper or gripper when opening the sheet and to carry out the pulling to the succeeding cylinder without any trouble, the gripper or gripper must be opened at a large rotation angle. As a result, the cam curve of the drive cam becomes complicated, which hinders high-speed operation of the printing press.

(Problems to be Solved by the Invention) The problems to be solved by the present invention include the complicated structure, troublesome assembly work, high manufacturing cost, and interference with sheets when opening the conventional technology. Therefore, an object of the present invention is to provide a novel sheet-fed rotary printing press that can simplify the support structure of the gripping claws and its driving mechanism, and can accurately and reliably open, close, and reverse the gripping claws with the simple structure. The object of the present invention is to provide a sheet turning device.

(Means for Solving the Problems) As shown in FIG. A pair of bearing members 65 and 66 that are reciprocated around a single reversal axis 68 that extends parallel to the rotation axis of the transfer cylinder 2.
and extends along two different axes parallel to the inversion axis 68 of the bearing members 65 and 66, and both bearing members 6
A pair of support shafts 13, 14 are installed between the bearing members 65, 66 so as to be rotatable therewith, and are rotatably supported relative to the bearing members 65, 66. A plurality of sets of gripping claws 15, 16 for gripping sheets are arranged separately, and are operatively connected to the support shafts 13, 14, respectively, so that the gripping claws 15, 16 are connected to both support shafts. A second drive mechanism 92 and a third drive mechanism 1 for opening and closing separately around the axes 13 and 14.
It consists of 30.

(Function) As shown in FIGS. 2 and 3, each of the above-mentioned means functions as follows. During single-sided printing, the gripping claws 15 on the support shaft 13 disposed outside the transfer cylinder 2 are not operated, and their tips are held on the circumference of the transfer cylinder 2. On the other hand, the support shaft 1 arranged inside the transfer cylinder 2
4 is rotated via the second drive mechanism 92, and the gripping claws 16 on the inner support shaft 14 are opened and closed, and the front line of the sheet 10 on the supply cylinder 1 is opened and closed by the opening and closing operation of the gripping claws 16. It is gripped and transferred from the transfer cylinder 2 to the delivery cylinder 3 at the contact point between the transfer cylinder 2 and the delivery cylinder 3 as the transfer cylinder 2 rotates. Also, at this time, the first drive mechanism 33 is not operated, and both gripping claws 15 and 16 are not activated.
is not reversed.

During double-sided printing, both bearing members 65 and 66 are first rotated through an angle of approximately 180 degrees via the first drive mechanism 33, and both support shafts 13 and 14 and both gripping claws 1
5 and 16 are reversed to the opposite position from the one-sided printing described above. Next, the gripping claws 15 on the support shaft 13 are opened and closed by rotating the support shaft 13 arranged inside the transfer cylinder 2 via the third drive mechanism 130.
The sheet 1 on the supply cylinder 1 is held between the gripping claw 15 and the other gripping claw 16 held on the circumference of the transfer cylinder 2.
The trailing edge of 0 is gripped. As the transfer cylinder 2 rotates, both bearing members 6 are
5 and 66 are rotated and both gripping claws 15 and 16 are reversed, so that the sheet 10 is turned over on the transfer cylinder 2 and then transferred to the delivery cylinder 3.

(Example) Hereinafter, an example in which the present invention is embodied in a sheet turning device of a sheet-fed rotary printing press capable of single-sided and double-sided printing will be described with reference to the drawings.

First, the general structure of the sheet turning device of this embodiment will be explained with reference to FIGS. 2 and 3. In the frame of a sheet-fed rotary printing press, there are a supply cylinder 1, a transfer cylinder 2, and a pressure cylinder as a delivery cylinder. Cylinders (printing cylinders) 3 are each rotatably arranged, and the transfer cylinder 2 is located between the supply cylinder 1 and the impression cylinder 3. Note that a plurality of rotary cylinders (not shown) constituting a sheet transport device of a sheet-fed rotary printing press are successively arranged in front of the supply cylinder 1 and behind the impression cylinder 3, respectively. Their explanation will be omitted.

The supply cylinder 1 has a pair of cylinder grooves 5 at 180 degrees,
6 is recessed, and the outer peripheral surface of the supply cylinder 1 separated by both cylinder grooves 5 and 6 serves as a sheet guide surface 7.
A gripping claw 8 is provided near one wall surface of each of the body grooves 5 and 6 so as to be openable and closable.
A suction device 9 is arranged near the other wall surface of 6. A single-sided printed sheet 10 is supported on the sheet guide surface 7 of the supply cylinder 1 by a printing cylinder arranged in front of the supply cylinder 1, and its front edge is held by the gripping claw 8. It is gripped, and the trailing edge is suction-held by the suction device 9.

The transfer cylinder 2 has a diameter that is half the diameter of the supply cylinder 1, and one cylinder groove 12 is formed which alternately faces the cylinder grooves 5 and 6 of the supply cylinder 1. Body groove 1
A first support shaft 13 and a second support shaft 14 are disposed inside the transfer cylinder 2 along the direction toward the center of the transfer cylinder 2 . The first outer support shaft 13 in FIG.
A plurality of first gripping claws 15 are supported on the top, and a plurality of second gripping claws 16 are supported on the second support shaft 14 on the outside in the figure. The gripping claws 15 and 16 are crossed with each other so that their tips extend in opposite directions.

Further, the impression cylinder 3 has the same diameter as the transfer cylinder 2, and has a cylinder groove 1 that can face the cylinder groove 12 of the transfer cylinder 2.
7 is formed. A gripping claw 18 is provided in the body groove 17 so as to be openable and closable.

When printing on one side, as shown in Figure 2,
The front edge of the sheet 10 on the sheet guide surface 7 of the supply cylinder 1 is held at the contact point between the supply cylinder 1 and the transfer cylinder 2 by the first and second gripping claws 15 and 16 of the transfer cylinder 2. The transfer cylinder 2 is gripped as shown in FIG.
After being transferred from the supply cylinder 1 onto the transfer cylinder 2 as the sheet 10 rotates, the front edge of the sheet 10 is held by the first and second gripping claws 1 at the contact point between the transfer cylinder 2 and the impression cylinder 3.
5 and 16, and is gripped by the gripping claws 18 of the impression cylinder 3, so that multicolor printing can be performed on one side of the sheet 10 on the impression cylinder 3.

On the other hand, during double-sided printing, as shown in FIG. 3, the sheet 10 on the sheet guide surface 7 of the supply cylinder 1 temporarily changes the contact position between the supply cylinder 1 and the transfer cylinder 2 as the supply cylinder 1 rotates. pass. When the trailing edge of the sheet 10 reaches the contact position, the suction device 9 of the supply cylinder 1
is stopped, the sheet 10 is released, and its trailing edge is gripped by the first and second gripping claws 15, 16 of the transfer cylinder 2. As the transfer cylinder 2 rotates, the gripping claws 15 and 16 are reversed from the gripping position, and the sheet 10 is turned over on the transfer cylinder 2, as shown by chain lines in the figure. Sheet 1
0 is transferred to the contact position between the transfer cylinder 2 and the impression cylinder 3 in this state, and at the same contact position, the gripping claw 1 of the impression cylinder 3
The leading edge of the impression cylinder 3 is gripped by the cylinder 8, and printing on the back side is performed on the impression cylinder 3.

Next, the structure of the transfer cylinder 2, which is the main part of the present invention, will be explained in detail.As shown in FIG.
The left and right side frames 21 of the sheet-fed rotary printing press of this embodiment,
A main shaft 24 is rotatably supported between the shafts 22 via a pair of bearings 23 . A drive gear 26 and a transmission gear 25 are each mounted on the left end of the main shaft 24 so as to be rotatable together. The drive gear 26 meshes with a gear (not shown) provided on the supply cylinder 1 to rotationally drive the main shaft 24, and the transmission gear 25 meshes with a gear (not shown) provided on the impression cylinder 3 to rotate the main shaft 24. 2 is transmitted to the impression cylinder 3. A left side plate 27 and a right side wall plate 28, which form the left and right side walls of the transfer cylinder 2, are respectively fixed on the main shaft 24 at inner positions of the left and right side frames 21 and 22. Further, a plurality of guide segment pieces 29 are fixed on the main shaft 24 at equal intervals between the left and right side wall plates 27 and 28, and the outer peripheral surface of each guide segment piece 29 forms the sheet guide surface of the transfer cylinder 2. 30, and the cylinder groove 12 of the transfer cylinder 2 is formed by a recess 31 formed in each guide segment piece 29, respectively.

A first drive mechanism 33 in this embodiment is provided between the left frame 21 and the left wall plate 27 for reversing the first and second gripping claws 15 and 16 during double-sided printing. The configuration of the first drive mechanism 33 will be explained based on FIGS. 1, 5, and 6.
A shaft pin 34 is provided on the outer periphery of the left side wall plate 27 so as to protrude leftward, and the shaft pin 34 has the main shaft 2.
An annular swinging member 35 surrounding the shaft 4 is rotatably supported by a bearing cylinder portion 36 provided in a portion thereof. A sector gear 37 is fixed on the swinging member 35 at a position facing the shaft pin 34 with the main shaft 24 in between, and the gear 38 is formed along an arc centered on the shaft pin 34.

The swinging member 35 is located near the bearing cylinder portion 36.
A grip cylinder portion 41 having a slit 40 is formed in the grip cylinder portion 41, and a roller shaft 43 is inserted through the grip cylinder portion 41 so that it can be tightened and fixed at any position in the left and right direction with a bolt 42. And the roller shaft 43
A running roller 44 is rotatably attached to the left end of the roller.

A cam mounting cylinder 46 fitted onto the main shaft 24 is fixed to the right side surface of the left bearing 23, and a left operating cam 47 and a right equal radius cam 48 are bolted to the outer peripheral surface of the cam mounting cylinder 46. 49, respectively. By moving the roller shaft 43 of the swinging member 35 left and right, the traveling roller 44 selectively engages with the operating cam 47 and the equal radius cam 48.

A spring support pin 51 is protruded from the left side of the left side wall plate 27 of the transfer cylinder 2.
A guide rod 52 is rotatably supported by an annular portion 53 at one end. Further, a spring receiving piece 54 is provided on the swinging member 35 at a position facing the roller shaft 43 with the shaft pin 34 interposed therebetween, and protrudes rightward. It is loosely inserted. A compression spring 56 is fitted onto the guide rod 52 between the spring support pin 51 and the spring receiving piece 54 . As a result of the spring action, the swinging member 35 is urged to rotate clockwise in FIG. It is becoming more and more like this.

As shown in FIG. 1, the cylinder groove 12 of the transfer cylinder 2
The left and right body grooves 27 at positions corresponding to
A pair of opposing shaft supports 59 and 60 are fixed to the outer surface of 28 by screws 58. The left shaft support 59 has a rotation shaft 61 that is rotatable around a single reversal axis 68 that extends parallel to the rotation axis of the main shaft 24.
is supported, and a pinion 64 is fixed on its left end by a screw 63, and a bearing member 65 having a circular side surface is fixed on its right end. Also,
A rotating shaft 62 rotatable around the reversal axis 68 is supported on the right shaft support 60, and a bearing member 66 opposite to the left bearing member 65 is supported on the left end surface of the rotating shaft 62.
is fixed.

A pair of concave fitting holes 67 are formed at positions equidistant from the reversal axis 68 on opposing end surfaces of the left and right bearing members 65 and 66, respectively.
Both ends of the first and second support shafts 13 and 14, which extend along two different axes parallel to the rotational axis of the main shaft 24, are rotatably fitted and supported in the pair of opposing fitting holes 67. has been done. As shown in FIG. 6, when the transfer cylinder 2 is rotated with the traveling roller 44 engaged with the operating cam 47 during double-sided printing, the roller shaft 43 is rotated based on the cam shape of the operating cam 47. Through this, the swinging member 35 is swung at a predetermined angle about the shaft pin 34, and due to the engagement between the sector gear 37 and the pinion 64, the left rotating shaft 61 and the bearing member 65 are reciprocated at an angle of approximately 180 degrees. Ru. Therefore, the first and second
The support shafts 13 and 14 are reciprocated about the reversal axis 68 while rotating the right bearing member 66 as the left bearing member 65 rotates. Note that, as shown in FIG. 5, during single-sided printing, the running roller 44 engages with the equal radius cam 48, so the swinging member 35 is not operated and both support shafts 13,
14 is not inverted.

Next, the configuration of the first and second gripping claws 15 and 16, which are separately supported on the first and second support shafts 13 and 14 and grip and release the sheet 10, is changed to This will be explained based on Figures 7 and 8.

As shown in FIG. 7, the bearing members 65, 66
The first and second support shafts 13,
14 are arranged along the radial direction of the transfer cylinder 2, the first support shaft 13 is located outside the circumference line of the transfer cylinder 2, and the second support shaft 14 is located inside the circumference line. There is. Note that this positional relationship is reversed when the bearing members 65 and 66 are rotated in the opposite direction during double-sided printing.

A plurality of first gripping claws 15 are inserted through the base end cylindrical portion 69 at equal intervals on the first support shaft 13, and are each tightened and fixed by bolts 70 so as to be rotatable together. There is. Each first gripping claw 15
A second gripping claw 16 is fitted onto the second support shaft 14 at a position corresponding to the base end cylindrical portion 71 so as to be relatively rotatable. First and second gripping claws 1
5 and 16 intersect with each other at their midpoints,
Grip plate portions 72 that face each other on the circumferential line of the transfer cylinder 2 are integrally formed at their tip portions, respectively.

A locking ring 74 having a substantially C-shaped side surface and having a pair of fastening pieces 73 protruding from the second support shaft 14 is inserted into and fixed to the second support shaft 14 so as to come into contact with one side surface of the cylindrical portion 71 of the second gripping claw 16. and a nut 76 is attached to one tightening piece 73.
An adjustment screw 75 is screwed to prevent loosening. Further, a spring receiving piece 77 is formed protruding from one side of the second gripping claw 16 so as to enter between the two tightening pieces 73 of the locking ring 74 . A compression spring 78 is interposed between one of the tightening pieces 73 of the locking ring 74 and the spring receiving piece 77, and the spring receiving piece 77 is brought into contact with the adjusting screw 75 by the force of the spring. By operating the adjustment screw 75, the position of the tip of the second gripping claw 16 can be finely adjusted. Furthermore, first and second gripping claws 1
Regulation pieces 80 and 81 are provided on the base end surfaces of 5 and 16, respectively.
is provided protrudingly, and both regulating pieces 80 and 81 have adjustment screws 8.
2 are screwed together and are prevented from loosening by nuts 83.

Between the regulating pieces 80 and 81 of each gripping claw 15 and 16 is a regulating rod 8 extending parallel to both support shafts 13 and 14.
5 is arranged, and its left and right ends are fixed to the pair of left and right bearing members 65 and 66 by screws 86. The tips of both adjusting screws 82 are brought into contact with both side surfaces of the regulating rod 85, thereby restricting the rotational position of both gripping claws 15, 16 in one direction, and when one gripping claw is released. The other gripping claw will follow and will not rotate.

As shown in FIG. 1, the first and second support shafts 1
3 and 14 are each provided with a spring support 8 approximately in the center.
8 and 89 are fixed, and a spring 90 is interposed between them. The spring force of the spring 90 biases the first support shaft 13 clockwise in FIG. 7, and the second support shaft 14 rotates counterclockwise. , a predetermined gripping force is applied to the first and second gripping claws 15 and 16.

Next, the second drive mechanism 92 in this embodiment for driving the second gripping claw to open and close, and the first
The structure of the drive mechanism 91 that is common to the third drive mechanism 130 for driving the gripping claws 15 to open and close will be explained based on FIGS. 1 and 9.

This common drive mechanism 91 is connected to the right side wall plate 2 of the transfer cylinder 2.
It is located on the right side of 8. An operating shaft 93 extending parallel to the main shaft 24 is rotatably supported between the left and right side wall plates 27 and 28 of the transfer cylinder 2 . A swing lever 94 is fixed to a protruding portion of an operating shaft 93 on the right side of the right side wall plate 28, and a shaft gripping portion 96 having a slit 95 is formed at one end thereof.
The roller shaft 9 is inserted into the shaft gripping portion 96 by a bolt 99.
7 is held so that its position can be adjusted left and right, and an engagement roller 98 is rotatably supported at the right end of the roller shaft 97.

A cam mounting cylinder 101 fitted onto the main shaft 24 is fixed to the inner surface of the right bearing 23, and a pair of left and right control cams 102 and 103, each having a different cam surface, are fixed to the outer peripheral surface thereof with bolts 104. has been done. Then, by operating the screw 99 of the shaft gripping portion 96 to change the position of the roller shaft 97 to the left or right, the engagement roller 98 selectively engages either one of the control cams 102 and 103. It's becoming like that.

A pair of connecting pieces 106 are formed protruding from the other end of the swing lever 94, and a guide rod 108 is rotatably connected at one end to a pin 107 provided between the connecting pieces 106. . A spring receiving piece 109 is protruded from the right side wall plate 28 of the transfer cylinder 2, and the other end of the guide rod 108 is loosely fitted into the insertion hole 110 of the spring receiving piece 109. A pressure spring 111 is fitted into the guide rod 108, and the spring force urges the swinging lever 94 to rotate in the counterclockwise direction in FIG. 9 about the operating shaft 93.
The engagement roller 98 is connected to both the control cams 102,
103.

Next, the configuration of the second drive mechanism 92 for driving the second gripping claws 16 to open and close will be described with reference to FIGS. 1, 4, and 10. This second drive mechanism 92 is arranged on the right side of the left side wall plate 27 of the transfer cylinder 2.

A swing lever 11 is located on the left end of the operating shaft 93.
3 is fixed. A support shaft 114 is implanted in the left wall plate 27 at a position a predetermined distance away from the pivot lever 113, and a driving body 115 is rotatably supported on the support shaft 114. A connecting rod 118 is rotatably connected at both ends between a pin 116 provided at the tip of the swing lever 113 and a pin 117 provided at the outer edge of the drive body 115. Further, an arcuate gear 119 is fixed to the left side surface of the same edge of the driving body 115.

As shown in FIG.
1 is implanted in the double-headed pin 121, and a first rack 122 that meshes with the arcuate gear 119 is movably supported in an elongated hole 123 extending through the longitudinal direction of the first rack 122. As the operating shaft 93 reciprocates based on the cam shape of the right control cam 103, the pivot lever 113 and the connecting rod 1
By swinging the arcuate gear 119 of the driving body 115 via the drive member 18, the first rack 122 is linearly moved back and forth in the direction of arrow Z and the direction opposite to arrow Z shown in FIG. .

On the other hand, a drive lever 125 is rotatably fixed to the left end of the second support shaft 14, and an abutment roller 126 is pivotally attached to the tip of the drive lever 125. This contact roller 126 is connected to the first rack 12 when the second support shaft 14 is arranged inside the transfer cylinder 2.
Abuts on the outer end surface of 2. Note that when the first and second support shafts 13 and 14 are reversed during double-sided printing, the drive lever 125 is disposed integrally with the second and second support shafts 14 at a position outside the transfer cylinder 2.
The abutment roller 126 is separated from the first rack 122 and is in a disengaged state.

Then, the contact roller 126 is connected to the first rack 12.
2, the first rack 122
When the first support shaft 14 is reciprocated in the direction of the arrow Z and the direction opposite to the arrow Z, the first support shaft 14 is reciprocated by a predetermined angle via the drive lever 125.
Each of the second gripping claws 16 on the second support shaft 14 can be opened and closed. Therefore, the control cam 103, the engagement roller 98, the operating shaft 93, the turning lever 113, the arc gear 119, the first rack 12
2, the drive lever 125, and the like constitute a second drive mechanism 92 of this embodiment.

Next, the configuration of the third drive mechanism 130 in this embodiment for driving the first gripping claw 15 to open and close will be explained based on FIGS. 1 and 11.

The third drive mechanism 130 is the right side wall plate 2 of the transfer cylinder 2.
It is located on the left side of 8. A swinging body 131 is fixed on the right end of the operating shaft 93, and an arcuate gear 132 is fixed on the right side of the outer edge thereof.
In addition, a second rack 134 is connected to a pair of headed guide pins 133 embedded in the right side wall plate 28 through an elongated hole 135.
It is movably supported. This second rack 134 is engaged with the arcuate gear 132 of the swinging body 131, and as the swinging body 131 swings, it is linearly reciprocated in the direction of the arrow Y and the direction of the opposite arrow Y in FIG. There is.

A drive lever 136 is rotatably fixed on the right end of the first support shaft 13, and an abutment roller 137 is pivotally attached to the tip of the drive lever 136. This contact roller 137 contacts the outer end surface of the second rack 134 when both support shafts 13 and 14 are reversed so that the first support shaft 13 is located inside the transfer cylinder 2 during double-sided printing. be touched. Note that when the first support shaft 13 is disposed outside the transfer cylinder during single-sided printing, the contact roller 137 is
It is separated from the rack 134 and is in a disengaged state.

Therefore, when the engagement roller 98 of the swing lever 94 in the common drive mechanism 91 is engaged with the left control cam 102 during double-sided printing,
By reciprocating the operating shaft 93 by a predetermined angle according to the cam shape of the control cam 102, the second rack 1
34 is reciprocated in the direction of the arrow Y and in the direction opposite to the arrow Y, and is integrally held with the first support shaft 13 via the contact roller 137 that contacts the second rack 134 and the drive lever 136. The claw 15 is driven to open and close.

Next, the operation of the sheet turning device of the sheet-fed rotary printing press of this embodiment constructed as described above will be explained.

First, the effects during single-sided printing will be mainly explained in the 2nd, 5th, and 10th sections.
This will be explained based on the diagram. FIG. 5 shows the state immediately before the sheet 10 on the sheet guide surface 7 of the supply cylinder 1 and the gripping claws 15, 16 of the transfer cylinder 2 reach the contact position between the supply cylinder 1 and the transfer cylinder 2. It shows. At this time, the first support shaft 13 is arranged outside the transfer cylinder 2, and the second support shaft 14 is arranged inside the transfer cylinder 2. The first and second gripping claws 15 and 16 are closed to each other on the circumference of the transfer cylinder 2 in the counter-rotation direction. The running roller 44 in the first drive mechanism 33 is positioned at the chain line position in FIG. 1 by operating the bolt 42, and is engaged with the equal radius cam 48. Therefore, even if the transfer cylinder 2 is rotated, the swinging member 35 and the bearing members 65, 66 are not operated due to the action of the equal radius cam 48, and both the support shafts 13, 14 are held in the above-mentioned positions without being reversed. Retained. Moreover, the first support shaft 1
3 is on the outside, the contact roller 137 of the drive lever 136 in the third drive mechanism 130 is in a state of disengagement with the second rack 134, and
Since the support shaft 14 of the rack is disposed in the inner position, the contact roller 126 of the drive lever 125 in the second drive mechanism 92 is in contact with one end surface of the first rack 122 (see FIG. 10). . The engagement roller 98 of the swing lever 94 in the common drive mechanism 91 is positioned at the chain line position in FIG. 1 by operating the screw 99, and is engaged with the control cam 103 on the right side.

In the state shown in FIG. 5, when the supply cylinder 1 and the transfer cylinder 2 are rotated, the operating shaft 93 rotates in one direction via the engagement roller 98 and the swing lever 94 according to the cam shape of the control cam 103. be done. Then,
As shown in FIG. 10, the first rack 122 is moved in the direction of arrow Z via the pivot lever 113, connecting rod 118, drive body 115, and circular arc gear 119 in the second drive mechanism 92. This results in
The contact roller 126 and the second
The support shaft 14 is rotated clockwise in the figure, and each of the second gripping claws 16 is opened. At this time, the first gripping claw 15 rotates following the opening operation of the second gripping claw 16 because the adjustment screw 82 provided on the regulating piece 80 contacts the regulating rod 85 and the position is regulated. There is no risk of being exposed. The tip of the second gripping claw 12 is placed on the lower side of the front edge of the sheet 10 fed by the supply cylinder 1.

Immediately thereafter, the gripping claw 8 of the supply cylinder 1
At the same time as releasing the front edge of the control cam 103, the operating shaft 93 is rotated in the opposite direction according to the cam shape of the control cam 103.
The first rack 122 is moved in the opposite direction of the arrow Z, and the second support shaft 14 is closed by the action of the spring 90 disposed between the support shafts 13,14.
Therefore, the leading edge of the sheet 10 is attached to each first gripping pawl 15.
and each gripping plate portion 72 of each second gripping claw 16
gripped between. Note that at this time, the first support shaft 1
3 is not rotated, each of the first gripping claws 15 is in a stationary state, and due to the contact between the adjusting screw 82 of the regulating piece 80 and the regulating rod 85, the tip of each is positioned on the circumferential line of the transfer cylinder 2. Retained.

By the way, when each of the second gripping claws 16 is closed, the closing position of each of the second gripping claws 16 is regulated to a constant position by the adjustment screw 75 provided on one of the tightening pieces 73 of each locking ring 74. The front edge of the sheet can be gripped almost in the same straight line. Furthermore, each of the second gripping claws 16 is rotatably supported on the second support shaft 14, and a compression spring 78 is provided inside them, so that the paper thickness of the sheet 10 can be reduced. Even if the gripping force is uneven, each of the second gripping claws 16 can grip the sheet 10 with a substantially uniform gripping force.

In this way, as shown in FIG.
It is transferred towards the contact point with. At the contact position, the second gripping pawl 16 is opened and closed in the same manner as described above, and the leading edge of the sheet 10 is delivered to the gripping pawl 18 of the impression cylinder 3. At the time of this delivery, both the support shafts 13 and 14 are arranged at both the inner and outer positions of the transfer cylinder 2, and both the gripping claws 15 and 16 are crossed with each other, so that the second gripping When the pawl 16 is opened, its tip is largely separated from the closed position in the direction of rotation of the transfer cylinder 2. Therefore, when the sheet 10 delivered to the impression cylinder 3 passes a position approaching the tip of the second gripping claw 16, the tip of the second gripping claw 16 and the leading edge of the sheet 10 There is no fear that the two may interfere with each other, and the transfer operation can be performed smoothly.
Therefore, the rotation center of the second gripping claw 16 is set to the transfer cylinder 2.
Unlike conventional flipping devices, which are placed on or outside the circumference of the
The tips of the gripping claws 16 can be spaced sufficiently apart from each other, thereby making it possible to smooth the cam shape of the control cam 103 in the second drive mechanism 92 and to perform high-speed operation of the sheet-fed rotary printing press without any trouble. .

Next, the operation during double-sided printing will be explained based on FIGS. 3, 6, and 11. During double-sided printing, the running roller 44 of the first drive mechanism 33 is disposed at the position shown by the solid line in FIG. 1 and engaged with the operating cam 47, and the engagement roller 98 of the third drive mechanism is arranged at the solid line position in the figure and engaged with the control cam 102 on the left side.

FIG. 6 shows the state in which the trailing edge of the sheet 10 on the sheet guide surface 7 of the supply cylinder 1 is on its way to the contact point between the supply cylinder 1 and the transfer cylinder 2. At this time, both support shafts 13 and 14 of the transfer cylinder 2 and both gripping claws 15,
16 is in the middle of a reversal operation around a reversal axis 68 via the running roller 44, the swinging member 35, the sector gear 37, the pinion 64, the bearing members 65, 66, etc. according to the cam shape of the operating cam 47.

When the supply cylinder 1 and the transfer cylinder 2 are each rotated in the state shown in FIG. 6, both support shafts 13 and 14 are further rotated clockwise around the reversal axis 68 according to the cam shape of the operating cam 47. Both gripping claws 1
The tips of 5 and 16 are arranged on the circumferential line of the transfer cylinder 2 in the rotational direction. When the trailing edge of the sheet 10 and the tips of the gripping claws 15 and 16 reach just before the contact points of the supply cylinder 1 and the transfer cylinder 2, the control cam 1
According to the cam shape of 02, the operating shaft 93 is rotated in one direction via the engagement roller 98 and the swing lever 94. Then, as shown in FIG. 11, the oscillating body 131 in the drive mechanism 130 in FIG.
32, the second rack 134 is moved in the direction of arrow Y. Then, a first
The support shaft 13 of is rotated counterclockwise in the figure,
Each of the first gripping claws 15 is opened, and the tip of the first gripping claw 15 is arranged on the lower surface side of the sheet 10.

Next, when the trailing line of the sheet 10 reaches the contact position in this state, the operation of the suction device 9 of the supply cylinder 1 is stopped and the trailing edge of the sheet 10 is released. At the same time, the operating shaft 93 is rotated in the opposite direction according to the cam shape of the control cam 102, and the second rack 134 is moved in the opposite direction of the arrow Y via the circular arc gear 132. Therefore, the first actuating shaft 13 is connected to the spring 90.
is rotated clockwise in the figure, the first gripping pawl 15 is closed, and the trailing edge of the sheet 10 is gripped between the two gripping pawls 15 and 16. At this time, the rotation of the second gripping claw 16 is restricted by the regulating rod 85, and its tip is held on the circumference of the transfer cylinder 2. In addition, the regulating rod 85 and the second gripping claw 1
The compression spring 78 installed in the sheet 10 acts in the same manner as in the single-sided printing, and applies a uniform gripping force to each part of the sheet 10.

In this way, when the trailing edge of the sheet 10 on the supply cylinder 1 is gripped by both gripping claws 15 and 16, both support shafts 13 and 14 are and both gripping claws 15, 16
is the reversal axis 68 as shown by the chain line in FIG.
is gradually reversed counterclockwise around . The sheet 10 is thus turned over on the transfer cylinder 2 in such a way that it leaves the sheet guide surface 7 of the supply cylinder 1 and comes into contact with the circumferential surface of the transfer cylinder 2 with its back side.

When the gripping claws 15 and 16 reach the contact point between the transfer cylinder 2 and the impression cylinder 3, the front edge of the sheet 10 that has been turned over is released from the gripping claws 15 and 16 and the pressure is applied. It is delivered to the gripping claw 18 of the body 3. At this time of delivery, unlike at the time of receiving, the positions of both support shafts 13 and 14 are reversed, so that the second support shaft 14 disposed inside the transfer cylinder 2 is rotated by the second drive mechanism 92. Then, the second gripping claw 16 is opened and closed. Furthermore, during this transfer, the tip of the second gripping claw 16 is moved away from the rotational direction of the transfer cylinder 2 by a large distance, similar to the transfer operation during single-sided printing described above, so that the sheets after being transferred to the impression cylinder 3 are paper 10
Interference between the front edge of the gripper and the tip of the second gripping claw 16 is avoided, and the transfer operation can be performed without any trouble.

Both gripping claws 15, 16 after delivering the sheet 10
is the operating cam 47 in the first drive mechanism 33
According to the cam shape shown in FIG. 6, it is sequentially rotated clockwise again around the reversal axis 68 to return to the state shown in FIG. 6 and reversed. And with this, one sheet of paper 1
The 0 flipping operation ends.

Other Embodiments The present invention is not limited to the configuration of the above-mentioned embodiments, but can also be embodied by other embodiments described in the next section.

(1) In the above embodiment, the first and second gripping claws 15,
16, but as shown in FIG.
3 and 14, respectively.
Note that 141 indicates the reversal axis of both gripping claws 139 and 140.

(2) In the above embodiment, the diameters of the transfer cylinder 2 and the impression cylinder 3 were each set to one half of the diameter of the supply cylinder 1, but as shown in FIG.
43 and the impression cylinder 144 are made the same diameter, the supply cylinder 142 and the impression cylinder 144 are provided with a pair of gripping claws 145 and 146, respectively, at 180 degree positions, and the transfer cylinder 143 is provided with the same diameter as in the previous embodiment. Two sets of gripping devices 147 may be arranged at 180 degree positions.

(3) In the second drive mechanism 92 and third drive mechanism 130 of the embodiment, the mechanism for transmitting the rotation of the operating shaft 93 to both the support shafts 13 and 14 is provided by the arcuate gears 119, 132 and the rack 122, 134, but the same effect can be obtained by interposing a link mechanism between the operating shaft 93 and the support shafts 13 and 14 instead.

(4) In the embodiment described above, the first drive mechanism 33 is disposed near the left side wall plate 27 of the transfer cylinder 2, but the first drive mechanism 33 having the same configuration is connected to the transfer cylinder 2.
If it is placed near the right side wall plate 28, a more reliable and stable reversing operation can be obtained.

(5) In addition, it is also possible to arbitrarily change the shape and configuration of the gripping claws or the configuration of each drive mechanism without departing from the spirit of the present invention, and the sheet-fed rotary press exclusively for double-sided printing does not have a single-sided printing function. It is also possible to apply and embody this invention to a printing press.

Effects As detailed above, the present invention provides at least a pair of bearing members that are reciprocally rotated around one reversal axis by a first drive mechanism, and the bearing members are provided with two different axes parallel to the reversal axis. a second drive mechanism for supporting a pair of support shafts extending along the support shafts, separately arranging a plurality of pairs of gripping claws on both support shafts, and driving both gripping claws to open and close on both support shafts; By separately operatively connecting the third drive mechanism and the third drive mechanism, it is possible to simplify the support structure of the gripping claws and the structure of the drive mechanism, and also to accurately and reliably grip and release the sheet and turn it over. It has excellent effects. Further, according to the above embodiment, both the support shafts are disposed at both the inner and outer positions of the transfer cylinder, and both the gripping claws are crossed with each other, so that the tips of the gripping claws that are released when the sheet is delivered are Another effect is that interference with the leading edge of the sheet is avoided, allowing the transfer operation to be carried out without any hindrance.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a transfer cylinder in a sheet-fed rotary printing press showing an embodiment of the present invention, FIG. 2 is a side view showing the sheet transfer action during single-sided printing, and FIG. A side view showing the sheet transfer action during double-sided printing, FIG. 4 is a schematic perspective view of the main parts of the transfer cylinder, and FIG. 5 is A of FIG. 1 showing the first drive mechanism.
-A line sectional view, FIG. 6 is a sectional view showing different operating states of the first drive mechanism, FIG. 7 is a sectional view showing the supporting structure of the gripping claw, and FIG. 8 is a sectional view showing the supporting structure of the regulating rod. 7 is a partially broken bottom view seen from below, FIG. 9 is a sectional view taken along the line B-B of FIG. 1 showing a common drive mechanism common to the second and third drive mechanisms, and FIG. 2
A sectional view taken along the line C-C in FIG. 1 showing the drive mechanism of
Fig. 1 is a sectional view taken along the line D-D in Fig. 1 showing the third drive mechanism, Fig. 12 is a sectional view showing the action of the gripping pawl, and Fig. 13 shows the gripping pawl in another embodiment of the present invention. The sectional view and FIG. 14 are side views of essential parts of a sheet-fed rotary printing press showing another embodiment. Supply cylinder...1, Transfer cylinder...2, Impression cylinder as a delivery cylinder...3, Sheet...10, First support shaft...
13. Second support shaft... 14. First gripping claw...
15. Second gripping claw... 16. First drive mechanism...
...33, Bearing member...65, 66, Inversion axis...
68, second drive mechanism...92, third drive mechanism...130.

Claims (1)

[Claims] 1. A transfer cylinder 2 is rotatably provided between a supply cylinder 1 and a delivery cylinder 3, and a plurality of pairs of gripping claws 15, 16 for gripping sheets 10 are opened and closed on the transfer cylinder 2. The trailing edge of the sheet 10 on the supply cylinder 1 is gripped by the gripping claws 15 and 16, and the gripping claws 15 and 16 are reversed as the transfer cylinder 2 rotates. In a sheet turning device for a sheet-fed rotary printing press in which a sheet 10 is turned over on a transfer cylinder 2 and then transferred to the delivery cylinder 3, a first At least a pair of bearing members 65, 66 that are reciprocally rotated by the drive mechanism 33 around a rotation axis 68 extending parallel to the rotation axis of the transfer cylinder 2; and parallel to the rotation axis 68 of the bearing members 65, 66. Extending along two different axes, both bearing members 65,
A pair of support shafts 13 and 14 are installed between the bearing members 65 and 66 so as to be rotatable therewith, and are supported to be rotatable relative to the bearing members 65 and 66. both gripping claws 15,
16 are arranged separately, respectively, and are operatively connected to the support shafts 13 and 14, respectively, so that the gripping claws 15 and 16 are connected to the support shafts 13 and 1.
2nd drive for opening/closing separately around the 4 axes.
A sheet turning device comprising a drive mechanism 92 and a third drive mechanism 130. 2 When both the gripping claws 15 and 16 are located on the circumference of the transfer cylinder 2, one of the support shafts 13 and 14 is arranged at an inner position toward the center of the transfer cylinder 2, and the other is arranged at an outer position. At the same time, the tip of the gripping claw 16 of the support shaft 14 in the inner position extends toward the outside of the transfer cylinder 2, and the support shaft 14 in the outer position
The sheet-fed rotary printing press according to claim 1, characterized in that the gripping claws 15 and 16 intersect so that the tip of the gripping claw 15 of No. 3 extends toward the inside of the transfer cylinder 2. Paper turning device. 3 A regulating member 85 between the two bearing members 65 and 66
The patent is characterized in that both gripping claws 15 and 16 are each provided with an engaging portion 82 that engages with the regulating member 85 when their tips are located on the circumferential line of the transfer cylinder 2. Claim 1
A sheet-fed sheet turning device for a sheet-fed rotary printing press according to item 1 or 2.