JPS6274880A - Folding guide in folding machine - Google Patents

Abstract

PURPOSE:To control an attitude of fourfold running paper and putting it with a fourfold crease accurately as well as to aim at improvement in folding accuracy, by installing each guide plate attached to bearing parts at both shaft ends of a pair of fold rolls. CONSTITUTION:Each groove in the specified depth and width is nicked in fold rolls 8a and 8b along the circumference of each part at both shaft ends where a bag side part and a piece side part of running paper are touchable, and guide plates 11a, 11c and 11b, 11d having thickness and width corresponding to these grooves and to be installed with noncontact are all set up there. And, these guide plates 11a and 11b are set up adjustably at each setting position in a running paper folding part between these fold rolls 8a and 8b at the specified intervals via brackets 10a-10d little close to these fold rolls 8a and 8b, and interlocked each with rocking motion of bearing parts 9a-9d. With this constitution, these guide plates control an attitude of the running paper and guide them just before a fold is put on by a blade so that paper is foldable at the center of the running paper in conformity with the accurate fold.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a device for folding printed matter in a rotary printing press.

Conventional Technology When folding printed matter such as newspaper (hereinafter referred to as running paper), the running paper is usually fed between a pair of folding rolls facing each other on the left and right sides, and folded by being pinched. That is, as shown in FIG. 4, the running paper (Al
is fed along the lower outer periphery of the folding drum 04 by a retainer 05 and cut into a predetermined length by the ore layer 03. This cut paper (N is a folding roller 207.07' driven by a folding blade 06 provided on the outer periphery of the folding drum 04 and revolving in order to fold it into four at the center of a predetermined length) The running paper (B) thus folded into four falls into the pocket of the paper discharge impeller 08, and as the impeller 08 rotates, it is folded into four. It is expelled ~).

Problems to be Solved by the Invention As mentioned above, when the running paper (A) is folded in four, the bag side of the paper (A) that has been folded in two is thick and difficult to crease. On the other hand, the paper side is thin and easily creases, so when making creases with the folding blade 06, the creases may shift and not be folded to the correct crease line.Especially as the number of sheets of paper increases and the speed increases, The problem was that the trend was becoming stronger.

Means for Solving the Problem The running paper is attached to the outer circumferential surface of the folding cylinder with a fastener, follows the rotation of the folding cylinder, is guided to the lower half of the folding cylinder, and is then guided to the lower half of the folding cylinder at that rotational phase. When the cutting is performed by the saw blade, the cutting needle is released from the staples at the same time, and the running paper of a predetermined length is completely released and becomes free. Before and after that, the intermediate part is pressed by the folding grade to create a crease.

At this time, guide plates are installed on the bearings at both shaft ends of the pair of folding rolls, and the guide plates control the posture of the running paper until it is pushed by the folding blade and fed between the pair of folding rolls. do.

A guide plate attached to the bearing part of the working folding roll guides the two-fold running paper while controlling its attitude until just before a four-fold crease is formed on the two-fold running paper at the folding grade.

Embodiment In FIGS. 1 to 3, the running paper (A) which has been folded in two in the previous process is driven by a nila pin roll 1 to form an ore layer 2 and a folding drum 3.
The leading end is cut by the saw blade 2α, and it is held in place by the clamp 4 so that it does not come off from the lower half of the folding drum 3. When the next cut is made to the running paper by the saw blade 2'α in this rotational phase, its leading end is also released from the retaining needle 4 around the same time.

The running paper cut into a predetermined length in this way is transported to the folding cylinder 3.
At the same time, the folding drum 3 is opened at its lower half circumference and becomes free, and at the same time, a fold is formed by the rotating folding blade 5 provided on the outer circumference of the folding drum 3, and the folding drum 3 is sandwiched between a pair of folding rolls 8α and 8b. The running paper is folded in two (Al is folded in four (B)
) and then released to the next process.

Incidentally, a curve 16 in FIG. 2 shows the locus of the folding blade 5.

In this way, a pair of folding rolls 8α are formed by the folding device.

In order to feed the running paper (A) between the folding rolls 8a and 8b with a crease formed by the folding blade 5, in the present invention, in addition to the conventional guide plate 7, the running paper (A) of the folding rolls 8α and 8h is
) grooves of a predetermined depth and width are cut in the folding rolls 8α and 8b along the circumference of both shaft end portions where the bag side and the bellow side can come into contact, and the groove is made in a non-contact manner according to the depth of the groove and the instep. Guide plate 11cL that has the thickness and width to fit.

11C, llj, and llj are placed. Information board 11α,
11C11j, lid is the folding plate 5, and the running paper (A
When creating a crease in the center of the sheet, the running paper (Al) is set to be folded from the center while maintaining a straight posture in the direction of travel.

Further, the guide plates 11α and 11b are connected to a pair of folding rolls 8.
At a predetermined interval in the running paper folding section between α and Bh, the mounting position 1 can be adjusted near both shaft ends of the pair of front folding rolls 8α and 8b via brackets lOα, 10C and 106.10d, respectively. installed, both bearing portions 9α of the folding roll
, 9c and gh, gct, respectively.

Incidentally, in FIG. 1, the cut paper (B) which has been folded into four pieces by the folding device and released, fits into each pocket of the impeller 12 in a timely manner, and is placed on the discharge conveyor 13 with its flat side guided by the guide plate 14. At this time, the orientation of the impeller 12 is controlled by a guide plate 15 that can be adjusted so that the cut paper (B) on the conveyor 13 is not stirred by the rotation of the impeller 12. The following parts have already been installed.

Note that the guides & may be installed in pairs, such as 11α, 11b, or 110.11d.

Effects of invention Guide plates 11α, 11C and llj, llj due to non-invention
By attaching the folding rolls 8α and 8b relatively to the folding portions of the folding rolls 8α and 8b, the posture of the running paper (Al) can be controlled at close range to make a four-fold crease on the two-fold running paper (Al) with the folding plate V-do 5. Since the paper is guided so that the folded V line does not shift,
The paper can now be folded along the exact crease line in the center of the paper, further improving the folding accuracy.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a folding machine equipped with the folding guide device of the present invention, Fig. 2 is a detailed view of the folding drum and folding roll section in Fig. 1, and Fig. 3 is a view taken along arrow X-x in Fig. 1. 4 are schematic explanatory diagrams of a folding machine in a conventional rotary printing press. A... Running paper 1... Nilabing roll 3
...Folding cylinder 5...Folding blades 8α, 3b
...Insert roll 11α, llj, llC, llj...Information board Sub-agent Patent attorney Shige Okamoto 2 people outside the kiln Fig. 1 Fig. 3 Fig. 4

Claims (1)

[Claims] In a folding machine consisting of a folding cylinder and a pair of folding rolls provided directly below and close to the folding cylinder, a periphery of the folding rolls is provided at a position corresponding to the side surface of the running paper to be folded. A groove is provided along the surface, and an arc-shaped guide plate that is slidably fitted into the groove is attached to the support part of the folding roll, and the guide plate guides the running paper bitten by the folding roll and the folding roll. A folding guide device for a folding machine, characterized in that the folding guide device is configured to be able to swing together with the folding machine.