JPH0637263B2 - Paper folding press folding machine - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a folding machine for cutting and folding a printed web into a predetermined size in a web-fed rotary printing press.

[Prior art]

The web-fed rotary printing machine is equipped with a folder that cuts a web, which is dried and cooled after printing, into predetermined lengths and folds the web half-widthwise or longitudinally. Folding is performed by this folding machine in such a manner that the web before cutting is half-folded in the width direction with a foamer, and the signature after cutting is folded in half in the length direction with an origami cylinder or in parallel 4 There are two-fold folding or parallel folding, and a folding method in which a folded signature is folded in half in the orthogonal direction with a fastener. These folding methods are selected according to the specifications of the signature and used independently. , Some of them are combined.

The folding device of each of the above folding devices is a plate-shaped folding blade that moves the signature being conveyed with tape to the paper rest to stop it, and then descends vertically toward the center of the stopped signature. The signature is folded halfway by folding it from the center into the space between the rollers below, and because of its structure, it is impossible to increase the speed beyond a certain speed, and the upper limit speed is restricted. Therefore, conventionally, when using a chipping device, it is unavoidable that the speed of the entire printing machine including the printing device and the paper discharge device must be reduced. It was hindered.

Therefore, conventionally, for example, as disclosed in Japanese Utility Model Publication No. 55-13341, two sets of signature conveying means and discharge means are provided, and high speed printing and parallel folding signatures are alternately fed to each series. It has been proposed to fold the paper at a low speed and then eject the paper. However, in this device, a pair of upper and lower speed reduction cylinders are brought into contact with a double-diameter gripping cylinder, and the signatures from the gripping cylinders are sent to the upper and lower folding paths while decelerating with the respective reduction cylinders. In addition, since the paper edge side of the signature is held by the gripping cylinder and the speed reducing cylinder with different speeds even after the claws of the speed reducing cylinder are opened and the gripping edge of the signature is released, the transport of the signature is unstable. As a result, the folding accuracy of the next step is reduced and the signature is clogged at the time of the next step, and the printing operation must be interrupted.

[Outline of Invention]

The present invention has been made in view of the above points, and has a folding cylinder that is in contact with the origami cylinder and has a needle and an insertion blade, and has a diameter of approximately 1 / 1.5 that is in contact with the folding cylinder. A holding cylinder with a holding plate facing the insertion blade, a reduction cylinder with a holding claw that rotates in contact with the holding cylinder and rotates at a lower peripheral speed than this, and the circumference of this reduction cylinder. A pair of upper and lower transfer cylinders that face each other at two points and have a gripping claw are provided, and high-accuracy folding can be performed without reducing the speed of parallel folding, thereby improving origami efficiency and folding accuracy. It provides a folding machine. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

〔Example〕

FIG. 1 is a schematic side view of an origami section showing an embodiment of a folding machine according to the present invention. In the figure, a lead roller 1, a knipper roller 2, and a knipper roller 3 are vertically arranged below a width-direction half-folding former provided in a paper input portion (not shown). In the present embodiment, the former is used. The web 4 half-folded in the width direction is guided to the origami part indicated by reference numeral 5.

The origami section 5 has a cutting cylinder 6 and a needle cylinder 7 each having a double diameter of the printing cylinder.
And are located below the knitting roller 3 and are axially mounted so that their circumferential surfaces are in contact with each other, and the web 4 is guided between these cylinders 6 and 7. A pair of cutting blades 8 extending over the entire length of the cutting cylinder 6 is provided at a location that divides the outer circumference of the cutting cylinder 6 that rotates in the direction indicated by the arrow A into two in the circumferential direction. A cutting blade receiver 9 made of an elastic material such as rubber is provided at a position where the outer peripheral portion of the needle barrel 7 rotating in the direction B is divided into two equal parts in the circumferential direction. It is provided at the opposite location. The reference numeral 10 indicates a plurality of two-row needles provided at a position slightly behind the cutting blade receiver 9 with respect to the rotation direction of the needle barrel 7 and is rotatably formed. 8 and the cutting blade receiver 9 are configured to pierce and hold the edge of the next web 4 following the web 4 whose paper tail has been cut. Reference numeral 11 denotes a plurality of paper pressing tapes attached to the peripheral surface of the needle cylinder 7 on which the web 4 is wound.
On the diagonally upper side of the needle cylinder 7, a folding cylinder 12 having a diameter approximately 1.5 times as large as that of the needle cylinder 7 and rotating in a direction indicated by an arrow C in the drawing is provided on the peripheral surface of the needle cylinder 7.
Are arranged so as to be in contact with the peripheral surface of the needle, and the outer peripheral portion is divided into six equal parts in the circumferential direction.
, And the three insertion blades 14 extending over the entire length of the case are arranged alternately. Of these, the needle 13 is provided at a position opposed to the needle 10 by the rotation of both barrels 7 and 12, and the needle 13 is pierced and held by the signature released from the holding of the needle 10, and the upper peripheral surface of the needle barrel 12 is held. It is configured to be wrapped around. 1
Reference numeral 5 denotes a plurality of paper pressing tapes attached to the peripheral surface of the needle cylinder 12 on the side where the signature is wound. The needle cylinder 1 is located diagonally below the needle cylinder 12.
A gripper cylinder 16 having a diameter of about 1 / 1.5 and rotating in a direction indicated by an arrow D in the drawing is arranged with its peripheral surface in contact with the peripheral surface of the needle cylinder 12, and its outer peripheral portion is A pair of gripping plates 17 are arranged at the two halves so as to face the insertion blades 14 due to the rotation of the barrels 12 and 16. When the insertion blade 14 faces the gripping plate 17, the insertion blade 4 causes the gripping plate 17 to grip the central portion of the signature, and is wound around the lower circumferential surface of the gripping body 16. ing. Reference numeral 18 denotes a plurality of paper pressing tapes attached to the peripheral surface of the gripping cylinder 16 on the side of the signature winding. Further, a reduction cylinder 19 that rotates in a direction indicated by an arrow E in the figure is disposed diagonally above the gripping cylinder 16 with its peripheral surface in contact with the peripheral surface of the supporting cylinder 16 and its peripheral speed. The outer diameter is set so as to be lower than the peripheral speed of the holding cylinder 16. That is, the holding cylinder 16 and the reduction cylinder 19 are
Although the rotation speed is about 1: 3, the outer diameter ratio is about 1: 2, and the circumferential surfaces of the barrels 16 and 19 are slid by this difference. This reduction cylinder 19
At the place where the outer peripheral part of 6 is divided into 6 equal parts, 6
The individual jaws 20 are arranged so as to face the jaw plate 17 by the rotation of the two bodies 16, 19, and each jaw 20 is changed from the jaw plate 17 to a different signature. The body 19 is configured to be wound around the upper peripheral surface thereof by the rotation of the body 19. 21,2
Reference numeral 2 denotes a plurality of paper pressing tapes attached to the upper peripheral surface and the lower peripheral surface of the reduction cylinder 19, respectively. Above the reduction cylinder 19, an upper transfer cylinder 23 having a diameter of about 1 / 1.5 of the reduction cylinder 19 and rotating at the same peripheral speed in a direction indicated by an arrow F in the figure,
The peripheral surface of the reduction cylinder 19 is disposed so as to be in contact with the peripheral surface of the reduction cylinder 19.
At the place where the outer peripheral portion of the upper transfer cylinder 23 is divided into two parts, the cylinder 1
A holding jaw 24 of the same configuration is arranged to face the holding jaw 20 by the rotation of 9, 23. Also, diagonally below the reduction cylinder 19, a lower transfer cylinder 25 having a diameter of about 1 / 1.5 of the reduction cylinder 19 and rotating at the same peripheral speed in the direction indicated by an arrow G in the drawing is arranged on the peripheral surface of the reduction cylinder 19. It is arranged in contact with the peripheral surface. At the place where the outer circumference of the lower transfer cylinder 25 is divided into two parts, the cylinder 19,
A gripping claw 26 of the same configuration is arranged to face the gripping claw 20 by rotation of 25. Reference numeral 27 denotes a plurality of paper pressing tapes attached to the peripheral surface of the upper transfer cylinder 23, and 28 denotes an axial phase difference from the paper pressing tape 27 and the upper transfer cylinder 23.
It is a plurality of strips of the upper conveyance tape attached to the lower peripheral surface of the. Further, 29 is a plurality of paper pressing tapes attached to the peripheral surface of the lower transfer cylinder 25, and 30 is the paper pressing tape 2
9 is a plurality of strips of lower conveying tape attached to the lower peripheral surface of the lower transfer drum 25 with a phase difference in the axial direction from 9. By doing so, among the six gripping claws 20 of the reduction cylinder 19, the three gripping claws 20 that are not adjacent to each other are the gripping claws 24 of the upper transfer cylinder 23.
The signatures are replaced in the opposite direction, and the remaining three jaws 20 are opposed to the jaws 26 of the lower transfer cylinder 25 and the signatures are replaced. The signature held by the upper jaw 24 is sent onto the upper transport tape 28, and the signature held by the lower jaw 26 is sent onto the lower transport tape 30. A not-shown tipping device is arranged on the conveying path of the upper and lower conveying tapes 28 and 30.

The folding operation of the folding machine configured as described above will be described with reference to FIGS. 1 and 2. After printing, the web 4 half-folded in the width direction by a not-shown formater is guided between the cutting cylinder 6 and the needle cylinder 7 via the lead roller 1 and the like, and the end of the needle cylinder 7 is held by the needle 10 so that the needle cylinder 7 It is wound around the lower half surface by 1/2 rotation. At this time, the paper tail of the wound web 4 is cut by the cutting blade 8 and the other needle 10 holds the end of the next web 4 following the cutting end. Both cylinders 6 and 7 in FIG. 2 (a) show this state. FIG. 2 (a) shows the positions of the signature 4K wound around the needle cylinder 7 and the positions of the nine signatures 4A to 4J that precede each by 1/2 turn of the needle cylinder 7. Shows. That is, in other words, when the needle cylinder 7 rotates 1/2 turn, the signature 4K moves to the position of the signature 4J, and the signature 4J moves to the position of the signature 4H.
In this case, when the needle cylinder 7 makes a 1/2 turn, the gripping cylinder 16 and the upper and lower transfer cylinders 23 and 25 also make a 1/2 turn, and the folding cylinder 12 makes a 1/3 turn.
Rotate. Further, the reduction cylinder 19 makes 1/6 rotation. The peripheral speeds of the needle cylinder 7, the folding cylinder 12, and the gripping cylinder 16 are the same, and the speed reduction cylinder 19 and the upper and lower transfer cylinders 23 and 25 are the same speed, which is, for example, about 35% slower than the needle cylinder 7 and the like. With such a configuration, in FIG. 2 (a), the signatures 4J and 4H that precede the signature 4K by 1/3 rotation of the signature cylinder 12 are held by the needles 13 and the signature 12 of the signature cylinder 12 is retained. The signature 4G is wound around the peripheral surface, and the leading signature 4G is about to be changed from the needle 13 to the holding plate 17 and is about to be wound around the holding cylinder 16, and the signature 4F is held by the holding plate 17. It is wound around and wrapped around the body 16. The signatures 4D and 4E preceding this are clamped by the jaws 20 of the reduction cylinder 19 and wound around the reduction cylinder 19, and the signature 4C is clamped by the jaws 20 and the upper part of the signature 4C is clamped. The gripping end of the transfer cylinder 23 is wound around the speed reduction cylinder 19 so that the gripping end of the transfer cylinder 23 passes through the contact points of both cylinders 19 and 23. Signature 4
Signature 4B that precedes C by 1/6 of the speed reduction cylinder 19
Is transferred from the gripping claw 20 of the reduction cylinder 19 to the gripping claw 24 of the upper transfer cylinder 23 and wound around the upper transfer cylinder 23, and then released from the gripping of the gripping claw 24 to be the upper transfer tape. Two
Captured in 8. Furthermore, reduction gear cylinder 19 than signature 4B
The signature 4A, which is preceded by 1/6 of the above, faces the no-claw portion of the upper transfer cylinder 23, so that the gripping end wound around the reduction cylinder 19 reaches the counter contact point with the lower transfer cylinder 25. There is.

FIG. 2 (b) shows a state in which each cylinder has rotated by 1/4 rotation of the needle cylinder 7 from the state of FIG. 2 (a), and a new signature 4L
Is held by the needle 10 and wound around the needle barrel 7. The signature 4K has been replaced by the needle 13 and the central portion has reached the counter contact points of the two bodies 7, 12. Further, the signature 4H is about to be half-folded by holding the center portion by the holding plate 17, and the signature 4G is half-folded and wound around the holding cylinder 16. Signature 4D,
4E is wound around the reduction cylinder 19, and the signature 4D is about to be clamped by the jaw 24 of the upper transfer cylinder 23. In addition, the signature 4C is wound around the reduction cylinder 19 past the counter contact point with the upper transfer cylinder 23, and the signature 4A is clamped by the gripping jaws 26 of the lower transfer cylinder 25 to the lower transfer cylinder 25. It is wrapped around. In addition, in FIG. 2 (a), the upper transfer tape 2
The signature 4B conveyed at 8 is undergoing parallel folding and orthogonal folding in the orthogonal direction by a not-illustrated stapler device.

FIG. 2 (c) shows a state in which each cylinder has further rotated by 3/4 rotation of the needle cylinder 7 from the state of FIG. 2 (b), and in this state, the signatures 4E to 4M are shown in FIG. The signature 4F has moved to the signature 4D position of FIG. 1 (a) by moving one rotation of the needle cylinder 7, that is, two pitches of the jaws 20 of the reduction cylinder 19 from the state of (a). The signature 4D is the jaw 24 of the upper transfer drum 23.
After being caught by the upper transfer cylinder 23 and wound on the upper transfer cylinder 23, it is released from the clamping of the clamping jaw 24 and is captured by the upper transport tape 28. The signature 4C is held by the clamping jaw of the lower transfer cylinder 25. Two
It has been replaced by 6. The signature 4A is conveyed by the jaw 26 and is about to be released from the jaw.

FIG. 2 (d) shows a state in which the respective cylinders have further rotated from the state of FIG. 2 (c) by 1/4 rotation of the needle cylinder 7. In this state, the signatures 4F to 4N are shown in FIG. From the state of b) 1 of the needle cylinder 7
The signature 4F has moved to the signature 4D position in FIG. 1 (b) by moving by the amount of rotation, that is, two pitches of the jaws 20 of the reduction cylinder 19. The signature 4E is wound around the reduction cylinder 19, and the signature 4C is clamped by the jaw 26 of the lower transfer cylinder 25 and wound around the lower transfer cylinder 25. Also, signature 4A
Is released from the grip of the jaw 26 and the lower transfer tape 30
And is conveyed toward a tipper device (not shown).

As described above in sequence, the web 4 is held by the needles 10 of the needle cylinder 7, cut at the paper tail, clamped by the needles 13 of the folding cylinder 12, and wound around the folding cylinder 12. The wound signature is held in the center by the holding plate 17 of the holding cylinder 16 and half-folded by the rotation of the holding cylinder 16, and is replaced by the holding jaw 20 of the reduction cylinder 19. And sequentially wound around the reduction cylinder 19. The wound signature is conveyed by the reduction cylinder 19 having a peripheral speed lower than that of the jaw cylinder 16, and the conveyed signature is held by the jaws 24 of the upper transfer cylinder 23 and the jaws of the lower transfer cylinder 25. It is replaced by 26 and so on. The upper transfer cylinder 23 conveys the signature at the same peripheral speed as the reduction cylinder 19, discharges it onto the upper conveyance tape 28, and conveys it to the tipper device. Further, the lower transfer cylinder 25 conveys the signature at the same peripheral speed as the reduction cylinder 19, and the lower conveyance tape 3
It is discharged to the upper side and conveyed to the tipper device.

Thus, the deceleration of the signature and the distribution to the upper and lower discharge paths are separated, and when the signature is discharged to the transport tapes 28 and 30, the paper tail of the signature is released, The Ding is stable and the song does not get jerky.

Next, the double-sheet folding operation by this folder will be described with reference to FIG. In this case, since the upper transfer cylinder 23 is not used, the jaw 24 is held inactive. Further, three of the six gripping claws 20 of the reduction cylinder 19 which are not adjacent to each other are made inactive, and one of the holding plates 17 of the holding cylinder 16 is also made inactive. After the preparation as described above, when the web 4 is supplied between the cutting cylinder 6 and the needle cylinder 7, the holding by the needle 10 and the cutting by the cutting blade 8 are performed as in the parallel folding shown in FIG. Then, the web 4 is wound around the needle cylinder 7. When each barrel rotates by two rotations of the needle barrel 7 after the tip of the web 4 is held by the needle 10, one holding plate 17
The three signatures 4A, 4B, 4 which have been replaced by the needle 13 as shown in FIG.
C is wound around the folding cylinder 12, and one signature 4D is wound around the needle cylinder 7. From this state, when each barrel rotates by 1/4 rotation of the needle barrel, the needle 13 holding the signature 4A pierces the signature 4D and holds it as shown in FIG. 3 (b). Wrap it around the folding cylinder 12 while stacking it on the signature 4A. At this time, the central portion of the signature 4B faces the holding plate 17.

When the respective cylinders rotate by 1/4 rotation of the needle cylinder 7 from this state, as shown in FIG. 3 (c), the signature 4B is half-folded by the center plate being clamped by the clamping plate 17. . Further needle cylinder 7
When each cylinder is rotated by 1/4 rotation, the signature 4B is wound around the gripper cylinder 16 as shown in FIG. 3 (d), and the signature 4C passes over the non-operating gripper plate 17. , Again, signature 4
E is held by the needle 13. When the respective cylinders rotate by 1/4 rotation of the needle cylinder 7 from this state, the signature edge 4B half-folded as shown in FIG. The stacking signatures 4A and 4D have their gripping edges facing the gripping body 16.

When the respective cylinders rotate by 1/4 rotation of the needle cylinder 7 from this state, the signature 4B half-folded as shown in FIG. 3 (f) is replaced by the jaws 20 of the reduction cylinder 19. The signatures 4A and 4D are wound around the deceleration cylinder 19, and the central portions of the signatures 4A and 4D that overlap each other are in contact with the gripping plate 17, and the signature 4F is superimposed on the signature 4C. When each cylinder rotates 1/4 rotation of the needle cylinder from this state, the signature 4B moves by 1/2 pitch of the jaw 20 as shown in FIG. The signatures 4A and 4D are folded in half by being clamped by the clamping plate 17 at the center and wound around the clamping cylinder 16. Further, the folding cylinder 12 is wound with a single signature 4E and two overlapping signatures 4C and 4F, and the needle cylinder 7 is wound with a new signature 4G. When each cylinder rotates 1/4 rotation of the needle cylinder from this state, as shown in FIG. 3 (h), the signature 4B further moves by 1/2 pitch of the jaw 22 and 2 Half-folded signatures 4A and 4D move 45 ° and are wound around the gripper cylinder 16 to form one signature 4E and two-fold signatures 4C and 4F.
And move 30 degrees. Further, the signature 4G is held by the needle 13 and wound around the folding cylinder 12, and a new signature 4H is held by the needle 10 and wound around the needle cylinder 7.

After this, rotate each barrel by 3 rotations of the needle barrel and
When the operations (e) to (h) are repeated three times, as shown in FIG. 3 (J), the cutting cylinder 6 to the gripping cylinder 16 are in the same state as in FIG. 3 (h), and the reduction cylinder 19 turns once, and on its circumference,
The signatures 4C, 4F and 4E, 4H, which are two-fold and half-folded, are held every other pitch of the jaw 20. Further, the two-fold half-folded signatures 4A and 4D are replaced by the jaws 26 of the lower transfer drum 25 and wound around the lower transfer drum 25, and the leading one-half folded signature 4B is clamped. The claw 26 is released from the grip, and is ejected and conveyed onto the lower conveyance tape 30. Then, by itself, each barrel continues to rotate, and the
The two-fold half-folded signature is discharged onto the lower transport tape 30. The number of half-folded signatures that are not overlapped by two is only one leading signature indicated by reference numeral 4B, and all two signatures are stacked from the second signature.

As described above, in the parallel fold shown in FIG. 2 in which two sheets are not overlapped, when the web 4 which has been subjected to the forma fold is supplied to the origami cylinder, it is cut once every half rotation of the needle cylinder 7. After being folded in parallel between the folding cylinder 12 and the holding cylinder 16 and being decelerated when passed from the holding cylinder 16 to the speed reduction cylinder 19,
Upper and lower transport tapes 28, 30 via both transfer cylinders 23, 25
Alternately discharged upwards. As a result, a signature of 8 pages is formed by the format folding and the parallel folding. Therefore, when the signature is conveyed to the stapler device, folded in the orthogonal direction and discharged, a signature of 16 pages is obtained.

Further, in the two-fold parallel folding shown in FIG. 3, when the web 4 which has been subjected to the form folding is supplied to the origami cylinder, the needle cylinder 7
When the needle cylinder 7 is passed from the gripper cylinder 16 to the speed reduction cylinder 19 after being cut once every 1/2 rotation of the It is decelerated and discharged onto the lower transfer tape 30 via the lower transfer drum 25. As a result, 16 folds can be performed with the fuma fold, double fold and parallel fold.
Since it becomes a page signature, when this is conveyed to the stapler apparatus, folded in the orthogonal direction and then discharged, a signature of 32 pages can be obtained. And from parallel folds that do not overlap 2
In the case of switching to the parallel folding of the stack of sheets, the cylinder arrangement is left as it is, and only a part of the jaws and the jaws need not be operated, and the switching operation is easy.

Then, in the non-overlapping parallel folding shown in FIG. 2 and the following folding, the peripheral speeds of the reduction cylinder 19 and the transfer cylinders 23 and 25 are different from the peripheral speeds of the cutting cylinder 6 to the gripping cylinder 16. Since it is decelerated and the supply speed to the chaper device is also decelerated, even if the speed from the cutting cylinder 6 to the gripper cylinder 16 is increased to match the printing speed, the speed is supplied to the chaper device at a slower speed. As a result, the folding accuracy of the folding is maintained, and since the signature discharge amount after the folding is the total discharge amount from the upper and lower chat devices, the production amount corresponding to the printing speed can be secured.

〔The invention's effect〕

As is clear from the above description, according to the present invention, in the folding machine of the rotary web printing press, the folding cylinder that is in contact with the folding cylinder and has the needle and the insertion blade, and the folding cylinder that is in contact with the folding cylinderゞ
A holding cylinder having a holding plate having a diameter of 1 / 1.5 and facing the insertion blade, and a reduction cylinder provided with a holding claw which is in contact with the holding cylinder and rotates at a lower peripheral speed than this. By providing a pair of upper and lower transfer cylinders facing each other on the peripheral surface of the speed reducer and having a jaw, the signature folded in parallel with the folding cylinder and the clamp cylinder is passed to the speed reducer to reduce the speed. By configuring it so that it is distributed to the transfer cylinders alternately, if a checker device is installed in the transport path of the signatures discharged from the upper and lower transfer cylinders, the parallel folding speed and the folding capacity for high speed printing can be obtained. Since the signature supply speed to the held stapler device can be reduced to a low speed, the printing speed can be increased, the productivity is improved, and the folding accuracy of the stapler device is improved. In addition, when the transport speed of the signature is reduced, the signature is firmly clamped by the jaws, and the tail of the signature is released when the paper is discharged from the transfer cylinder, so the signature will not bend. In addition to improving the folding accuracy, it is possible to distribute different patterns up and down considering the imposition of the plate, which facilitates the post-process and improves the workability.

Further, it is possible to switch to the two-fold parallel folding by a simple operation, and the operability is improved, and since the cutting of the signature and the double-folding are separately performed at different positions, a high cutting precision can be obtained. .

[Brief description of drawings]

1 to 3 show an embodiment of a folding machine of a web-fed rotary printing press according to the present invention, and FIG. 1 is a schematic side view of an origami section thereof.
FIG. 2 is an operation explanatory view of parallel folding without overlapping, and FIG. 3 is an operation explanatory view of two-fold parallel folding. 6 ... Cutting cylinder, 7 ... Needle cylinder, 12 ... Folding cylinder, 13 ...
Needle, 14 ... Inserting blade, 16 ... Holding body, 17 ...
Holding plate, 19 ... Reduction cylinder, 20, 24, 26 ... Holding jaw, 23 ... Upper transfer cylinder, 25 ... Lower transfer cylinder.

Claims (1)

[Claims] 1. A folding cylinder having needles and insertion blades alternately arranged at a portion which is in contact with an upstream folding paper cylinder and divides an outer peripheral portion into a plurality of equal parts.
A gripping cylinder provided with a gripping plate facing the insertion blade at a position having a diameter of about 1 / 1.5 and dividing the outer peripheral portion into a plurality of parts facing the folding cylinder, and a pair of gripping cylinders facing the gripping cylinder. A speed reduction cylinder having contact jaws opposed to the gripping plate at a position where the peripheral surface comes into contact with each other and rotates at a lower peripheral speed than that, and a peripheral surface is provided at each of two peripheral surfaces of the speed reduction cylinder. A pair of upper and lower transfer cylinders provided with a gripping claw facing the gripping claw at a position where they are brought into contact with each other and rotate at the same peripheral speed to divide the outer peripheral portion into a plurality of equal parts. Folding machine for printing machine.