JPS6055428B2 - Folding machine of rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a folding machine of a rotary printing press, and more specifically, it is concerned with improving the folding machine of a rotary printing press, and more specifically, it is concerned with improving the folding machine of a rotary printing press. The present invention relates to a folding machine for a rotary printing press that allows the web to be reliably caught in the folding machine barrel without being affected by the web.

Generally, the web printed in the printing unit of a rotary printing press passes through a drying device and a cooling device, is folded in the paper feeding direction in a folding machine, and is then cut in the horizontal direction and discharged, or After the paper is cut into pieces, it is horizontally folded to a predetermined size and output as a signature.

This will be briefly explained with reference to the three-cylinder horizontal folding machine shown in FIG. 1. That is, the printed web 12 on the printing cylinder (not shown) is transferred to the sliver 1
4, and is stretched by a tension roller 16 provided at the introduction part of the folding machine and sent to a former 18 consisting of an inverted triangular inclined plate. The supplied web 12 is
The isosceles of this former 18 serves as a guide and is squeezed, and after being folded in half at the top of the triangle, a two-folding roller 20
The paper is creased accurately and cut in the transverse direction using the cutting cylinder 22. Next, after piercing the cut web with the needle 25 which is movable in the blade receiving part of the plunger cylinder 24 and wrapping it around the body, the needle 25 is inserted into the plunger cylinder 24 at the tangential line between the bite cylinder 26 and the plunger cylinder 24. The web is laterally folded by a folding blade 27 that freely moves forward and backward from the web, and if necessary, chopper folding is performed by a chopper 28 to form a predetermined signature, which is then discharged via an impeller 30. In this way, in conventional folding machines, the folding blades extend radially from one side of the folding machine bodies disposed opposite each other, and the web is pushed into the recessed part of the other folding machine body to fold the paper in the horizontal direction. , the cutting edge of the web after being cut by the cutting drum is pierced and hooked by a needle that periodically advances and retreats in the radial direction of the folding machine barrel, and the structure is such that it is wrapped around the plunging drum and conveyed to the cutting drum. We are hiring.

In other words, the conveyance of the cut web relies solely on the hooking of the needles that pierce the web, so if the paper thickness of the web fed to the folding machine changes or the number of webs increases or decreases, the needles will be caught. The threaded needle alone will not be able to pull the web sufficiently, and there is a risk that the needle hole in the web will eventually become long and break, leading to a serious accident such as the inability to transport the web. Furthermore, even if the needle hole is not cut, if an excessive load is applied to the needle hole, causing it to deform and become a long hole, the delicate folding position between the thrusting cylinder and the biting cylinder will shift, resulting in a decrease in folding accuracy. In addition, in a two-cylinder folding method in which the cutting cylinder also serves as a plunging cylinder, the web cutting accuracy similarly deteriorates. Therefore, the inventor developed a built-in folding machine according to the technology! As a result of repeated prototype improvements to eliminate the above-mentioned drawbacks, at least the side on which the web is wound, of the pair of opposing folding machine bodies that clamp the fed web and perform horizontal folding or cutting. If a pinch band, which is made of an elastic member and is slightly larger than the radius of curvature of the folding machine body, is disposed in the circumferential direction on the surface of the folding machine body on the other side of the folding machine body, The web fed between the opposing folding machine bodies is pierced and captured by the needles, and is also subjected to friction with a pinch band that is disposed on at least one of the folding machine bodies and extends slightly from the surface of the folding machine body. It has been found that because of the engagement, the web can be reliably conveyed, and accurate folding operations can be achieved without impairing folding accuracy or cutting accuracy.

Moreover, in this case, there is a slight gap equal to the paper thickness of the web to be fed + α between the folding machine body to which the pinch band is attached and the other folding machine body disposed close to and facing the folding machine body. However, the gap distance should be set to the most appropriate value depending on various conditions such as whether the web to be fed is thin paper or thick paper, and whether it is a single web or multiple webs. From the standpoint of reliable web conveyance, it is impossible to adjust the gap so that the web can be held. It is lacking.

For this reason, it has also been confirmed that the clearance can be adjusted by providing an eccentric bearing mechanism on one or both of the opposing folding machine bodies and changing the axial distance between the two folding machine bodies.
Therefore, the main purpose of the present invention is to reliably capture the web to be folded at right angles to the paper feeding direction and transport it to an accurate folding position, thereby dramatically improving folding accuracy (and cutting accuracy). The purpose of the present invention is to provide an improved folding machine for a rotary printing press.

In order to achieve the above object, the present invention provides a folding machine for a rotary printing press that horizontally folds or cuts a fed web, at least a folding machine on the other side of the folding machine body on which the web is wound. It is characterized in that a band made of an elastic member is attached to the folding machine body on the other side to the folding machine body, and an inter-body gap adjustment mechanism is disposed in either of the pair of folding machine bodies. Next, the improvement of the folding machine for a rotary printing press according to the present invention will be described in detail below using preferred embodiments and with reference to the accompanying drawings.

FIG. 2 is a partially cut away plan view of a preferred embodiment of the present invention, showing a folding machine body 34 pivoted to a frame 32. As described above, this folding machine body 34 is a folding machine body that faces at least the folding machine body on the side around which the web is wound among the pair of opposing folding machine bodies, and is Depending on the arrangement of the fuselage, it can be used as a cutting fuselage, a thrusting fuselage, or a hooking fuselage. The outer peripheral surface of the folding machine body 34 is made of an elastic member, and the folding machine body 34
A plurality of arcuate bands curved with a radius of curvature slightly larger than the radius of curvature of the pinch bands 36 are arranged at predetermined intervals in the circumferential direction and in the longitudinal direction of the folding machine body 34. (Although the number of pinch bands 36 is not limited, it is desirable that they can cover at least the signature width of the web supplied to the folding machine.)
That is, the pinch band 36 is made of an elastic member having a large coefficient of friction, such as rubber or plastic, and is made of a ring having a radius of curvature slightly larger than the radius of curvature of the folding machine body 34 on which it is disposed. It is considered as an arc-shaped member piece obtained by cutting at 90 degrees.

This pinch band 36 is attached to the folding machine body 34 in the third
As shown in the figures to FIG. A method of burying and fixing in 40 is recommended. For example, in the mounting means shown in FIGS. 3 and 4, the band mounting groove 42 formed in the band mounting fitting 38 is connected to a step formed in the mounting fitting main body and a presser foot removably disposed on the fitting. It is defined by the plate 44, and is set to have a slightly smaller dimension than the cross-sectional vertical width of the pinch band 36. Therefore, after arranging the pinch band 36 in the band attachment groove 42 of the metal fitting 38, apply the press plate 44 laterally to the metal fitting 38 and tighten the bolt 46, so that the pinch band 36 is firmly attached to the metal fitting 38. (See Figure 4). Then,
By embedding this band attachment fitting 38 in the groove 40 provided around the folding machine body 34 and finally fixing it with bolts 48, the attachment of the pinch band 36 to the folding machine body 34 is completed. Moreover, instead of this attachment means, as shown in FIG. 5, an attachment groove 42 is independently bored in the band attachment fitting 38, and
The pinch band 36 may be forcibly inserted therein and firmly adhered with an adhesive.

In either case, the radius of curvature of the pinch band 36 is the same as that of the folding machine body 3.
4, the pinch band 36 slightly protrudes from the circumferential surface of the folding machine body 34, as shown in FIGS. 3 and 5. However, in this state, pinch band 3
Since the protruding surfaces of 6 are unbalanced in terms of accuracy, it is preferable to finish by grinding along the surface of the folding machine body 34 after the final installation of the pinch band is completed to obtain uniform accuracy. It is. Next, a slight gap (paper thickness 10α of the web to be supplied) is created between the pair of folding machine barrels arranged facing each other in this way.
A center-to-center distance adjustment mechanism that allows the center-to-center distance to be maintained at a constant value in response to changes in paper thickness will be described.

Although various types of adjustment mechanisms of this type are possible, one highly preferred embodiment is shown in FIGS. 2 and 6. In FIG. 2, a rotating shaft 50 fixed to the folding machine body 34 is rotatably supported by a bearing 52. As shown in FIG. An eccentric sleeve 54 is inserted through the frame 32 with a slight clearance, and the bearing 52 is housed in the eccentric sleeve 54. As a result of the eccentric sleeve 54 maintaining a slight clearance with respect to the frame 32, the central axis of the folding machine body 34, which is supported by the bearing 52 housed in the eccentric sleeve 54, can accommodate the eccentric sleeve 54. Eccentricity is possible by moving within the clearance, which means that the distance between the folding machine body 34 and another opposing folding machine body can be adjusted within a certain range. That will be understood. A lever member 56 is fixed to the eccentric sleeve 54, a connecting rod 58 is loosely attached to the tip of the lever member 56, and a through hole 60 is bored in the head of the connecting rod. Cut the thread groove (see Figure 6).

Furthermore, two opposing frames 32, 3 in FIG.
A sleeve 62 is inserted through each of the sleeves 62 and fixed by a collar 64, and a through shaft 66 is rotatably inserted through the sleeves 62, 62, and a manual handle 68 is fixed to one end of the through shaft 66. The ends terminate at one side of the sleeve 62. The sleeve 62 is integrally provided with a bracket 70 that is bent and protrudes parallel to the through shaft 66, and a screw shaft 72 is loosely attached to the bracket 70 so as to be rotatable but immovable in the axial direction. One end of the screw shaft is screwed into the threaded through hole 60 of the connecting rod 578, and the bevel gear 74 is fixed to the other end. In addition, the through shaft 6
A bevel gear 76 is also disposed and fixed at 6, and this bevel gear 76 meshes with the bevel gear 74 to form a gear transmission system. Note that such a gear transmission system needs to be installed on both of the two opposing frames 32, 32, as clearly shown in FIG. fuselage 3
A uniform eccentric operation of 4 is achieved. Further, as shown in FIG. 6, by arranging stoppers 80 close to both sides of the lever member 56, which can be adjusted forward and backward by bolts 78, the upper and lower limits of the eccentric distance can be set. suitable. By configuring the device according to the present invention as described above, the following actions and effects can be obtained. That is, an embodiment in which the present invention is applied to the three-cylinder horizontal folding machine shown in FIG. 1 will be described below with reference to the schematic configuration shown in FIG. 7. In this embodiment, the cutting cylinder 22
Pinch bands 36 are arranged around the entire circumference at approximately 90 degree intervals, and a plunging cylinder 24 is disposed close to the cutting cylinder 22. The printed web 112 is fed between the cutting cylinder 22 and the plunging cylinder 24 through the tension roller 16, is pierced by a needle 82 disposed in the plunging cylinder 24 so as to be movable back and forth, and is captured by the plunging cylinder 24. It is wound up. At this time, since the cutting drum 22 is provided with a pinch band 36 that protrudes slightly in the radial direction from the circumferential surface thereof, the web 12 is frictionally engaged with the pinch band 36, and therefore the web 112 is connected to the needle 82. It is smoothly conveyed to the plunger cylinder 24 under the cooperative action of the piercing and catching action. Furthermore, as mentioned above, the web 12 fed between the folding machine cylinders may have a different paper thickness depending on the printing purpose, or may be made into a multiple web. It is necessary to adjust the gap to the optimum value.

At this time, as shown in FIG. 2, if the hand 68 is rotated, this rotational movement is transmitted to the screw shaft 72 via the bevel gears 74 and 76, causing the screw shaft 72 to move forward and backward in the axial direction. Become. Therefore, the connecting rods 5 and 8 screwed onto the screw shaft 72 move the lever member 56 fixed thereto forward and backward, and the folding machine body 34 which is supported on the bearing 52 eventually moves through the eccentric sleeve 54. By eccentrically moving the cutting cylinder (corresponding to the cutting cylinder 22 in FIG. 7), the gap between the folding cylinders can be easily adjusted. ! In this case, as described above, eccentric mechanisms such as bevel gears are connected to the eccentric sleeves 54 on both sides of the folding machine body 34, and the handles 68
Since they operate synchronously through the through shaft 66 by the rotational operation of the folding machine, the gap between the two folding machine bodies can be uniformly adjusted. Returning again to FIG. 7, the web 12 thus reliably conveyed to the plunging cylinder 24 under the cooperative action of the needle 82 and the pinch band 36 is wound around this plunging cylinder 24, and is 180
At the rotated position, a cutter 84 provided on the cutting cylinder 22 so as to be able to move forward and backward cuts the sheet in the lateral direction.

The cut web is transferred to 18 of the plunging cylinder 24 as shown in the figure.
The folding blade 86 wraps around the circumferential surface at 0 degrees, and when the plunger cylinder 24 further rotates 90 degrees, the folding blade 86 touches the recess 8 provided in the gripper cylinder 26.
8, fold the web in half horizontally, and use a biting spatula 9
0 grips the web and ejects the paper. In addition, in the three-cylinder horizontal folding method shown in FIG.
Since the winding is not attached, attach the pinch band 3 to this cutting body 22.
6 are arranged, and the pinch bands 36 are provided at 90 degree intervals so as not to interfere with the folding blades 86 provided on the plunging cylinder 24. Next, further consideration will be given to an application example of the present invention in the case where another folding machine body arrangement method is adopted.

Fig. 8 shows a method in which paper is cut twice using four folding machine cylinders and discharged on both sides, which basically consists of a cutting cylinder 22 and a deceleration claw cylinder 9.
2 are arranged facing each other as a pair.
In this case, the diameter of the cutting cylinder 22 is equal to or smaller than that of the printing cylinder (not shown).
Since the cut web is wound alternately at intervals of 90 degrees, the pinch bands 36 are alternately arranged on the portions of the cutting cylinder where the web is not wound, with the phase angle shifted by 90 degrees. . Further, the gap adjustment mechanism may be provided on both sides of the two cutting drums 22, 22 as shown in the figure, or may be provided on only one side. FIGS. 9 and 10 show an embodiment of the two-cylinder horizontal folding method.

In the case shown in FIG. 9, the web 12 is first cut by the cutting plunger 94
After the needle 82, which is disposed so as to move forward and backward, pierces and captures the needle and wraps it around the cutting cylinder 94 at 90 degrees, the web is folded with the cutting cylinder 26, and the folded web is wrapped around the cutting cylinder 26. Because it is wrapped around
The pinch bands 36 are arranged alternately on both the cutting plunger cylinder 94 and the biting cylinder 26 at 90 degree intervals. Also,
In the embodiment shown in FIG. 10, the web 12 is supplied to one side of the cutting and thrusting cylinder 94, is wrapped around the folding machine body 94 by 180 degrees, is cut, and is then bitten and folded by the biting cylinder 26. , the pinch bands 36 are arranged only on the bite barrel 26 alternately at 90 degree intervals. Next, FIGS. 11 to 13 show another preferred embodiment of the inter-body gap adjustment mechanism used in the present invention.

That is, the bearing stand 96 that rotatably supports the folding machine body 34 is arranged by appropriate means so as to be movable in the horizontal direction on the horizontally arranged frame 32. A nut 98 having a threaded hole is fixed to the bearing stand 96, and a threaded shaft 100 is screwed into the threaded hole of the nut 98. The extended portion of the screw shaft 100 is rotatably inserted into the bracket 102, a worm wheel 104 is fixed to the end thereof, and the worm 106 is inserted into the bracket 102 so that the worm wheel 104 and the rotating shaft intersect at 90 degrees. It is pivotally supported and meshes with the worm wheel 104. Therefore, when the manual handle 108 fixed to the worm 106 is rotated, the worm wheel 104 is rotated and the screw shaft 10 is rotated.
It will be understood that as a result of the movement of the folding machine 0 back and forth, the bearing stand 96 moves back and forth in the horizontal direction, and the distance between the folding machine bodies can be suitably adjusted. As described above, according to the improved folding machine according to the present invention, among the pair of opposing folding machine bodies,
A pinch band made of an elastic member is arranged at least on the surface of the folding machine body on the other side opposite to the folding machine body on the side where the web is wound so as to slightly protrude from the circumferential surface of the folding machine body. By installing a mechanism that adjusts the axial center distance between the webs, it is possible to reliably transport the web fed to the folding machine and improve folding and cutting accuracy. Even when the number of webs increases or decreases, such as a single web or multiple webs, the inter-body gap can always be maintained at an optimum value, which has a remarkable effect.

Although the improved folding machine according to the present invention has been described in detail using preferred embodiments, the present invention is not limited to these embodiments, and many improvements and modifications can be made within the spirit of the invention. There are things that can be done.

For example, the mechanism for adjusting the gap between the folding machine bodies is not limited to the mechanism described in connection with the attached drawings, and various other mechanisms are also included within the scope of the present invention. be.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the schematic configuration of a typical folding machine in a rotary printing press, Fig. 2 is a partially cutaway plan view of an improved folding machine according to the present invention, and Fig. 3 is a partially cutaway plan view of the improved folding machine used in the present invention. FIG. 4 is a perspective view showing one embodiment of the pinch band attachment means, FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. The perspective view shown in FIG. 6 shows an embodiment of the axial center distance adjustment mechanism of the folding machine body used in the present invention, and the cross-sectional view taken along the line ■-■ in FIG. 2, and FIGS. The figures show schematic cross-sectional views of various horizontal folding methods to which the present invention is applied. The figures each show a two-cylinder horizontal folding system, and FIGS. 11 to 13 show the schematic configuration of another embodiment of the axial center distance adjustment mechanism used in the present invention,
Fig. 11 is a plan view, Fig. 12 is a side view and Fig. 13
The figure shows a schematic diagram of a gear transmission system using a worm wheel and a worm. 12...Web, 14...Slitter,
16...Tension roller, 18...Former, 20...Nipping roller, 22...
...Cutting cylinder, 24...Plunging cylinder, 25...
... Needle, 26 ... Biting body, 27 ... Folding blade, 28 ... Chopper, 30 ...
Impeller, 32... Frame, 34...
Folding machine body, 36...Zench band (band body), 38.
...Band mounting bracket (band gate mounting bracket), 40.
...Groove, 42...Band mounting groove, 44.
...Press plate, 46, 48...Bolt, 5
0... Rotating shaft, 52... Bearing, 54...
...Eccentric sleeve, 56...Rubar member,
58...Connecting rod, 60...Threaded through hole, 62...Sleeve, 64...Collar, 66...Through shaft , 68... Handle, 70... Bracket, 72... Screw shaft, 74, 76... Bevel gear, 78...
・Bolt, 80... Stopper, 82...
...Needle, 84...Cutter, 86...
Folding blade, 88... Concavity, 90... Bite 1/R, 925... Deceleration claw body, 94...
・Cutting thrust cylinder, 96...Bearing stand, 98...
... Nut, 100 ... Screw shaft, 102 ...
... Bracket, 104 ... Worm wheel, 106 ... Worm, 108 ...
handle.

Claims (1)

[Scope of Claims] 1. In a folding machine of a rotary printing press that horizontally folds or cuts a fed web, an elastic member is provided at least in a folding machine barrel on the other side of the folding machine barrel on the side around which the web is wound. 1. A folding machine for a rotary printing press, characterized in that a band consisting of a belt body is attached, and an inter-cylinder gap adjustment mechanism is disposed on either of the pair of folding machine cylinders. 2. The rotary printing press according to claim 1, wherein the strip has a radius of curvature slightly larger than the radius of curvature of the folding machine barrel to which the strip is attached, and is disposed circumferentially on the folding machine barrel surface. folding machine. 3. The rotary press according to claim 1 or 2, wherein the band is attached to a band attachment fitting, and the band attachment fitting is embedded and fixed in a groove bored in the circumferential direction on the surface of the folding machine body. Folding machine of printing press. 4. A folding machine for a rotary printing press according to claim 3, wherein the band mounting bracket is integrally formed with a groove for inserting the band, and the band is adhered to this groove by adhesive means. . 5. The rotary printing machine according to claim 3, wherein a step is formed on the band attachment fitting, and a groove for attaching the band is formed by the presser plate disposed on the step and the step. folding machine. 6 The inter-body clearance adjustment mechanism consists of an eccentric sleeve loosely attached to the frame, a lever member fixed to the eccentric sleeve, a connecting rod loosely attached to the lever member, a screw shaft screwed onto this connecting rod, and this screw shaft. A folding machine for a rotary printing press according to any one of claims 1 to 5, comprising a gear mechanism for moving forward and backward. 7. The inter-body clearance adjustment mechanism is composed of a bearing stand that is movably arranged on the frame, a nut fixed to the bearing stand, a screw shaft screwed onto the nut, and a gear mechanism that moves the screw shaft forward and backward. Claims 1 to 5
A folding machine of a rotary printing press described in any of the above.