JP3943904B2 - A web folding machine and a web cutting and needle pulling timing setting method in the folding machine. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary machine for a rotary press and a method for setting a cutting timing of a web.
[0002]
[Prior art]
FIG. 6 conceptually shows an example of a folding machine 1 of a newspaper offset rotary press. In this folding machine 1, a plurality of laminated printed webs are fed to a triangular plate 4 via a drag roller 2, and the laminated web is fed into the longitudinal direction, that is, along the running direction of the web. Folded. Then, the folded web 3 is transferred by the lead-in rollers 5, 5, the nipping rollers 6, 6, and the like and then fed between the saw cylinder 7 and the folding cylinder 8.
[0003]
As shown in FIG. 7, the saw cylinder 7 has a double cylinder structure, and two saw blades 10 supported by a saw table 9 are arranged on the outer peripheral surface at symmetrical positions around the axis. Has been. Further, the folding cylinder 8 that rotates in synchronization with the saw cylinder 7 has a triple cylinder structure and pierces the web 3 with three saw blade receivers 11 that function as receiving members for the saw blade 10. The three needles 12 for conveying the web 3 and the three folding blades 13 for folding the central portion of the web 3 cut by the saw blade 10 are attached at an angular interval of 120 °. Yes.
[0004]
The needle 12 is attached to the tip of a needle arm 12b assembled to the needle shaft 12a. The needle 12 and the folding blade 13 enter and exit from the circumferential surface of the folding cylinder 8 at a predetermined rotational phase position of the folding cylinder 8.
[0005]
Hereinafter, the operation of the saw cylinder 7 and the folding cylinder 8 in the conventional rotary press will be described with reference to FIGS.
FIG. 7 shows a state in which the leading end of the web 3 is moved to a position just before a predetermined needle removal position by the counterclockwise rotation of the folding cylinder 8. When the folding cylinder 8 further rotates from this state and the needle 12 moves to the above-described needle removal position, the needle 12 is removed from the leading end of the web 3 and the restriction of the leading end is released. In addition, the needle 12 appears and disappears from the peripheral surface of the folding cylinder 8 by the rotation of the needle arm 12b about the shaft 12a.
[0006]
FIG. 8 shows a state in which the folding cylinder 8 is rotated until the saw blade 10 of the saw cylinder 7 approaches the saw blade receiver 11 of the folding cylinder 8. Thereafter, when the saw blade 10 comes into contact with the saw blade receiver 11 of the folding cylinder 8, the web 3 is cut to form the rear end of the web 3 corresponding to the preceding end. In the state shown in FIG. 8, the tip of the folding blade 13 is rotationally moved to the circumferential surface position of the folding cylinder 8, that is, the position where it contacts the web 3. Therefore, the folding blade 13 pushes the web 3 toward the folding roller 14 by the clockwise rotation of the folding blade 13 accompanying the subsequent rotation of the folding cylinder 8. When the folding cylinder 8 rotates until the folding blade 13 protrudes from the peripheral surface of the folding cylinder 8 by a predetermined length, the web 3 is folded between the folding rollers 14 and 14 by the folding blade 13, and FIG. Folded along a fold line perpendicular to the paper surface.
[0007]
With the subsequent rotation of the folding cylinder 8, the folding blade 13 protrudes the most as shown in FIG. 9, and then the tip of the folding blade 13 moves to the circumferential surface position of the folding cylinder 8 as shown in FIG. . Then, when the folding cylinder 8 rotates to the state of FIG. 11, the folded book 18 is formed by the web 3 folded in half.
The signature 18 is placed on the paper discharge conveyor 20 by an impeller 19 shown in FIG.
[0008]
[Problems to be solved by the invention]
Incidentally, as described above, in the conventional rotary press, the web 3 is folded between the folding rollers 14 and 14 by the folding blade 13 after the needle 12 is pulled out from the leading end of the web 3. For this reason, when the web 3 is folded, there is a possibility that the leading end of the web 3 may flutter, and end folding or wrinkles may occur at the leading end.
Further, when the web 3 is folded, the leading end position of the web 3 moves toward the folding rollers 14 and 14, so that the folding position of the web 3 is shifted from the center position of the web 3, that is, the folding accuracy is high. This causes the disadvantage of lowering.
[0009]
The present invention has been made in view of such a situation, and in a folding machine and a folding machine of a rotary press capable of suppressing edge folding, wrinkles, and the like of a web and improving the folding accuracy of the web. An object of the present invention is to provide a web cutting and needle removal timing setting method.
[0010]
[Means for Solving the Problems]
A folding machine of a rotary press according to the present invention includes a folding cylinder having a triple cylinder configuration in which a needle is pierced at the tip of a web to transfer the web, and the web is folded into a pair of folding rollers by a folding blade. A rotary machine folding machine comprising a double-cylinder saw saw copper that cuts the web in cooperation with a cylinder, wherein the cutting of the web is completed before the folding blade starts the folding operation of the web Needle operating means for pulling out the needle so that the needle is pulled out from the web after the relative position of the folding cylinder and the saw cylinder is set, and the folding blade starts the web folding operation. It is characterized by providing.
[0011]
The web cutting timing setting method according to the present invention includes a folding cylinder having a triple cylinder configuration in which a needle is inserted into the tip of the web to transfer the web, and the web is folded into a pair of folding rollers by a folding blade. Applied to a rotary machine folding machine having a double-cylinder saw copper for cutting the web in cooperation with the folding cylinder, and cutting the web before the folding blade starts the web folding operation. Setting the relative position of the folding cylinder and the saw cylinder so that the operation is completed, and setting the timing for removing the needle so that the needle is removed from the web after the folding blade starts the folding operation of the web. And a setting step.
According to the web folding machine and the web cutting and needle pulling timing setting method according to the present invention, the folding operation of the folding blade is started in a state where the needle is stuck at the leading end of the web.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1-5 is a principal part conceptual diagram which shows embodiment of the setting method of the folding machine and web cutting | disconnection of the rotary press which concerns on this invention, and a needle | hook removal timing. In FIG. 1 to FIG. 5, elements that are the same as those shown in FIG. 7 to FIG. Since the specific configuration and operation of this common element are as described above, description thereof will be omitted below.
[0013]
The folding machine according to this embodiment includes the above-described double cylinder configuration saw cylinder 7 and triple cylinder configuration folding cylinder 8, and the relative positions of these cylinders 7 and 8 are shown in FIGS. It is different from that of the conventional folding machine. That is, in this embodiment, in order to complete the cutting of the web 3 by the saw cylinder 7 before the folding blade 13 starts to push the web 3, the saw cylinder 7 is positioned above the saw cylinder 7 of the conventional folding machine. Is located.
[0014]
In this example, the relative positional relationship between the cylinders 7 and 8 is set so that the axis center of the saw cylinder 7 and the axis center of the folding cylinder 8 are located in the same horizontal plane. It is not necessary to set the positional relationship. In short, it is only necessary to set a relative positional relationship in which the cutting of the web 3 is completed before the folding blade 13 starts the pushing operation.
[0015]
On the other hand, in this embodiment, as shown in FIG. 1, the needle removal position is rotated in the direction of rotation of the folding cylinder 8 by an angle α (about 30 ° in this example) from the horizontal line (rotation in the counterclockwise direction in FIG. 2). It is set so that the position is close to the opposite side. In the conventional folding machine, as shown in FIG. 7, the needle removal position is set at a position of an angle β (β> α, approximately 45 ° in this example) from the horizontal line.
[0016]
The needle removal position is a needle removal timing position for removing the needle 12 provided in the folding cylinder 8 from the web 3, and is set by a needle operation mechanism (not shown) that performs the insertion / removal operation of the needle. The needle operating mechanism is configured to rotate the shaft 12a that supports the needle arm 12b by a cam mechanism that is interlocked with the rotation of the folding cylinder 8, for example, and the needle 12 is caused to appear and disappear by the rotation of the shaft 12a.
The needle removal position can be adjusted by changing the cam position of the cam mechanism. In this embodiment, when the needle 12 moves to the line of the angle α, the needle 12 is folded. The cam position of the cam mechanism is set so as to sink from the peripheral surface 8.
[0017]
Hereinafter, the operation of the folding machine according to this embodiment will be described.
FIG. 1 shows a state immediately after the web 3 is cut by the saw blade 10 of the saw cylinder 7 and the saw blade receiver 11 of the folding cylinder 8. At this time, the tip of the folding blade 13 is not in contact with the web 3, and the needle 12 stabbed at the leading end of the web 3 has not reached the needle removal position.
As is clear from this figure, in this embodiment, the cutting of the web 3 has already been completed before the folding blade 13 contacts the web 3.
[0018]
FIG. 2 shows a state in which the tip of the folding blade 13 has been rotated to a position where it contacts the web 3 as the folding cylinder 8 rotates. In this state, the needle 12 has not moved to the needle removal position, and therefore the tip of the web 3 is held on the peripheral surface of the folding cylinder 8 by the needle 12.
[0019]
Thereafter, as the folding cylinder 8 rotates, the folding blade 13 further rotates in the clockwise direction, so that the web 3 is pushed toward the folding roller 14 side. At this time, since the tip of the web 3 is held on the peripheral surface of the folding cylinder 8, there is no possibility that the tip of the web 3 flutters, and so the end of the web 3 is not folded or wrinkled. . Further, since the folding blade 13 rotates while squeezing the surface of the web 3 to define the folding position of the web 3, the folding accuracy of the web 3 is also improved.
[0020]
FIG. 3 shows a state in which the folding blade 13 is most protruded, that is, a state in which the blade 13 is rotated to an intermediate position of the folding roller 14. In this embodiment, when the folding blade 13 is rotated to the position immediately before the position shown in FIG. 3, that is, when the folding position of the web 3 is defined, the needle 12 is retracted. A position angle α is set.
When the needle 12 is retracted, the holding of the web 3 by the needle 12 is released, so that the web 3 is folded between the folding rollers 14 and 14 as shown in FIG.
[0021]
As shown in FIG. 4, when the folding blade 13 is further rotated and its tip is located on the peripheral surface of the folding cylinder 8, the folding operation of the web 3 by the rollers 14 and 14 proceeds considerably. And in the state which the folding cylinder 8 rotated to the state shown in FIG. 5, the folding operation | movement of the web 3 by the rollers 14 and 14 is almost completed, and the folding book 18 is formed.
[0022]
As described above, according to this embodiment, since the cutting of the web 3 is completed before the folding blade 13 starts the folding operation of the web 3, the folding blade 13 is in a state where the needle 12 is stuck in the web 3. Although the folding operation of the web 3 by 13 is started, this folding operation is performed smoothly.
And since the folding operation | movement of the web 3 by the folding blade 13 is performed in the state in which the needle | hook 12 is stuck in the web 3, flapping of the front-end part of the web 3 at the time of this folding operation is suppressed, and this front-end part It is possible to prevent edge breaks and wrinkles from occurring.
[0023]
Moreover, according to this embodiment, when the web 3 is pushed by the folding blade 13, the leading end side of the web 3 is not drawn toward the folding roller 14, so that the folding position of the web 3 is set with high accuracy. Can do.
[0024]
As described above, after the web 3 is cut, the rear end portion of the web 3 formed by this cutting is placed in a free state. However, since the rear end portion is transferred in the same direction as the circumferential surface movement direction of the folding cylinder 8, there is no fluttering phenomenon that causes end folding or wrinkles.
In short, the fluttering phenomenon that causes end folds and wrinkles occurs remarkably on the leading end side of the web 3 that is transferred in the direction opposite to the circumferential movement direction of the folding cylinder 8, and according to the above embodiment, This fluttering phenomenon on the leading end side is effectively suppressed.
[0025]
【The invention's effect】
As is clear from the above description, according to the present invention, the relative positions of the folding cylinder and the saw cylinder are set so that the cutting of the web is completed before the folding blade starts the folding operation of the web, and The needle is withdrawn from the web after the folding blade starts the folding operation of the web. Therefore, flapping of the leading end of the web when the web is folded between the folding rollers is suppressed, and it is possible to prevent end folding and wrinkles from occurring at the leading end. Further, when the web is pushed by the folding blade, the leading end side of the web is not drawn toward the folding roller side, so that the web folding position can be set with high accuracy.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a main part of a folding machine according to the present invention showing a state immediately after a web is cut.
FIG. 2 is a conceptual diagram of a main part of the folding machine showing a state immediately before a folding blade starts folding a web.
FIG. 3 is a conceptual diagram of a main part of the folding machine showing a state in which the folding blade protrudes most.
FIG. 4 is a conceptual diagram showing a main part of a folding operation of a folding roller in the folding machine.
FIG. 5 is a conceptual diagram of a main part showing a state in which the folding operation of the folding roller is almost completed.
FIG. 6 is a conceptual diagram illustrating the basic configuration of a rotary machine of a rotary press.
FIG. 7 is a conceptual diagram of a main part of a conventional folding machine showing a state immediately before a web is cut.
FIG. 8 is a conceptual diagram of a main part of the conventional folding machine showing a state immediately before the folding blade starts folding the web.
FIG. 9 is a conceptual diagram of a main part of the conventional folding machine showing a state in which the folding blade protrudes most.
FIG. 10 is a conceptual diagram of a main part showing a folding operation of a folding roller in the conventional folding machine.
FIG. 11 is a conceptual diagram of a main part showing a state in which the folding operation of the folding roller is almost completed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Folding machine 3 Web 4 Triangular plate 7 Saw cylinder 8, 8 'Folding cylinder 10 Saw blade 11 Saw blade holder 12 Needle 13 Folding blade 14 Folding roller

Claims (2)

Transferring the web put a needle into the tip of the web, and the write non-folding folding cylinder a pair of folding rollers the web by folding the blade, and the saw copper you cut the web in cooperation with the folding drum A rotary press folding machine comprising:
The relative position of the folding cylinder and the saw cylinder is set so that the cutting of the web is completed before the folding blade starts the folding operation of the web, and the folding blade starts the folding operation of the web. A folding machine for a rotary press comprising needle operating means for pulling out the needle so that the needle is pulled out from the web later. Transferring the web put a needle into the tip of the web, and the write non-folding folding cylinder a pair of folding rollers the web by folding the blade, and the saw copper you cut the web in cooperation with the folding drum It is applied to a rotary machine with a
Setting a relative position of the folding cylinder and the saw cylinder so that the cutting of the web is completed before the folding blade starts the folding operation of the web;
Setting the needle pulling operation timing so that the needle is pulled out from the web after the folding blade starts the folding operation of the web;
A web cutting and needle pulling timing setting method in a rotary machine of a rotary press.

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