JPS5934622B2 - Folding machine including folding rolls whose rotation speed can be adjusted - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a folding machine for printed paper in a printing press, particularly a rotary printing press, and more particularly to a folding roll for folding paper traveling on a conveyor.

In rotary printing presses, printing is done in the form of continuous paper. After printing, the paper is cut, folded, and leaves the printing press in the form of a signature. In this case, the final stage of the printing press includes a folding machine J.The folding machine includes a triangular plate former for folding continuous paper, a slitter for cutting paper lengthwise, a cutting cylinder for cutting paper widthwise, and a paper The book includes a folding cylinder for folding the paper, a conveyor for transporting the paper, a chopper for making creases in the paper, a pair of folding rolls for folding the paper, and further includes a turn bar and guide rolls for changing the direction of the paper. Among these devices, the invention relates to a conveyor and a chopper cooperating therewith, as well as folding rolls for folding the paper.After the continuous paper has been printed, these are generally put into the form of a signature before leaving the printing press. However, in this case, there may be some changes in the form of the signature.

For example, in the most common folding method, printing paper is folded with a former, and then cut and folded via a cutting cylinder and a folding cylinder. Next, the signature is conveyed by a conveyor, and after being creased by a chopper on the conveyor, it is folded by a folding roll. Alternatively, the printing paper is not folded by the former, but directly enters the cutting cylinder and folding cylinder through the turn bar, where it is cut and folded. The signatures are then conveyed by a conveyor, on which they are creased by a chopper and subsequently folded by folding rolls. In the case of these two types of folding, if we consider the signature that is placed on the conveyor from the folding drum etc., in the case of the former signature, the length of the signature in the lateral direction (direction perpendicular to the conveyor direction) It will be noticed that the lateral length is shorter, i.e. half, compared to the lateral length in the case of the latter notebook.

Furthermore, it is important to note that the paper delivered from the folding cylinder to the conveyor remains constant in relation to the speed of printing in the printing press. The signatures are therefore moved at a constant distance from each other on the conveyor. So, if we consider the case where these signatures are further folded on the conveyor, the signatures are folded by a chopper and then folded by a pair of folding rolls located on the underside of the conveyor. From the top of the conveyor,
The pair of folding rolls folds the paper as it is drawn down the conveyor. By the way, since the documents are sent one after another on the conveyor, the preceding documents completely disappear from the conveyor before the tip of the next document reaches the rear end position. Must be.
If this is not the case, the leading edge of the next document will collide with the rear end of the previous document before it disappears from the conveyor, which is a problem. Therefore, in such a folding roll, the rotational speed of the roll needs to be set in accordance with the feeding speed of the signature so that the collision between the signatures as described above does not occur. By the way, as mentioned above, if there is a change in the lateral length of the signature, if the rotation speed of the folding roll is set according to the maximum length in the lateral direction, it will be possible to change the lateral direction. Even if Nagaga's folding papers arrive, they should be able to be processed without any problems using this folding roll. However, in this way, the pair of folding rolls will always be rotated at its set speed (rather high speed) even if the transverse dimension of the signature is smaller than the maximum dimension. This means that energy is wasted in rotating the folding rolls unless the lateral dimension of the signature is the maximum dimension. In addition, high rotation speed causes inconveniences such as increased wear and tear on parts, and shortened lifespan of parts. Moreover, it will also be expensive in terms of cost. The object of the present invention is to provide a folding machine construction, in particular a folding roll, which eliminates the above-mentioned disadvantages.

The present invention will be explained below by means of preferred embodiments thereof.

1 and 3, reference numeral 1 denotes a conveyor belt, which moves in the direction indicated by the small arrow k. In Figure 1, 11 and 12 are paper widths 1
/ 2-fold notebook (meaning half the width of the original printed paper; however, since the width of the original printed paper may vary to some extent, the width of the folded notebook may also vary), and this is a It is sent from the folding cylinder on belt 1 in the direction shown by arrow 2. 21 in Figure 3,
Reference numeral 22 is a folding paper with a paper width of 1/1 (meaning the same width as the original printing paper, however, this width varies as described above), which is also moved on the conveyor belt 1 in the direction indicated by the arrow '. It is sent from the folding body. In FIGS. 1 and 3, the distance between successive notebooks is always constant P. In FIGS. 1 and 3, 16 is a paper stopper and 13 is a paper stopper. FIG. 2 is a sectional view of the conveyor 1, and 14 is a table;
15 is a pair of folding rolls.

When the signature 11 being conveyed on the conveyor 1 hits the paper stopper 16, the advance of the signature 11 is stopped thereby, and at the same time, the chopper arm 17 is immediately lowered, and accordingly the chopper 13 is lowered. In Figure 2a, Chiyotsupa 113
The tip is in contact with the signature 11. The cutter 13 also folds the folded folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding folding rolls At this time, Chiyotupa 13 is at its lowest position and will rise thereafter. In Figure 2c, Chiyotsupa 13 is in the middle of its ascent, while Signature 11
The sheet descends while being folded approximately in the center by the pair of folding rolls 15, and is about to disappear from the table 14, and will soon leave the folding rolls 15 and be discharged downward. During such folding, the next signature 12 advances on the conveyor 1. Therefore, the descending signature 11 is the next signature 1.
2 reaches the position of the rear end 51 of the signature 11,
In other words, before the distance of P/2 has passed, the conveyor 1,
It must also be lower than the top surface of the table 14. In other words, the speed of the folding roll 15 needs to be selected so that interference between the preceding folded signature and the subsequent folded signature does not occur. Next, the width of the signature is 21,2 as shown in Figure 3.
Consider the case where the lateral dimension is large as shown in 2. In this case, the signatures 21 and 22 should not be passed through the format, but should be paper width 1/2.
1, it passes through a folding cylinder and a cutting cylinder, and then is transported by a conveyor belt 1. When the signature 21 hits the paper stopper 16, the paper chipper 13 begins to descend and hits the upper surface of the signature 21 as shown in Figure 4a, and the paper chipper 13 continues to descend as shown in Figure 4b. Continuing on, in FIG. 4c, the signature is bitten by the pair of folding rolls, folded, descends, and is about to disappear from the table 14. During this folding process, the next signature 22 is carried on the conveyor, so the signature 21 must be folded before the signature 22 travels a distance of P/2 in order to avoid collision with the signature 22. It needs to be lowered so that it is located below the upper surfaces of the conveyor 1 and the table 14. Therefore, in this case the folding roll pair 15 must be rotated at a higher speed than in the previous case. A mechanism for changing the rotational speed of the pair of folding rolls 15 in this case is shown in FIGS. 5 and 6.

In the figure, 13 is the chopper arm, 17 is the chopper arm,
14 is a table, and 15, 15 is a pair of folding rolls. The pair of folding rolls has a folding roll gear 27 coaxially therewith.
27 is fixed, and idle gears 28, 28 mesh and engage with these two gears, respectively, and on the other hand, the two idle gears also mesh and engage with each other. Another idle gear 29 meshes with one gear of the idle gear 28. The idle gear 29 has a bevel gear 31 fixed coaxially with the idle gear 29. In FIG. 5, a gearbox 45 is located to the left of the gear train described above.

A drive shaft 42 is rotatably supported on the gearbox, and a gear 35 and a gear 33 are fitted and supported on the drive shaft so as to be rotatable with respect to the drive shaft. Further, on the drive shaft, a groove wheel-shaped clutch 38 is disposed between the two gears, and is slidable in the axial direction with respect to the drive shaft 42.
Further, it is mounted so as to be rotatable in cooperation with the drive shaft in the rotational direction of the drive shaft. A frictional engagement member is attached to the outer surface of the flange of the groove wheel type clutch, and similar frictional engagement members are attached to the end surfaces of gears 35 and 33 facing the frictional engagement member. A clutch lever 39 is loosely fitted into the groove of the clutch 38. Furthermore, the gearbox 45 includes a driven shaft 41, on which a gear 36 and a gear 34 are fixed. The gear 36 is configured to mesh with the gear 35, and the gear 34 is configured to mesh with the gear 33. The gear sizes of the gears 33 and 34 and the gears 35 and 36 are opposite to each other. The clutch 38 can be slid axially on the drive shaft 42 by means of a clutch operating handle 44 leading to the exterior of the gearbox 45 by moving a clutch lever 39. For example, when clutch 38 is moved to the left in FIG. 5, the friction member of the clutch engages the friction member of gear 35, causing gear 35 to rotate under the power from drive shaft 42. Then, the gear 36 that meshes with the gear 35 is rotated, and therefore the shaft 41 is rotated. The shaft 41 extends outside the gear box, and a bevel gear 32 is fixed to the tip thereof, and this gear 32 meshes with the bevel gear 31 described above. Therefore, the rotation of the drive shaft 42 is transmitted through the gearbox and the gear train 27, 28, 29, 3 mentioned above.
1 to the pair of folding rolls 15 to rotate it. In this case, the rotation speed of the folding roll is set to gearbox 4.
5 in relation to the gear ratio of gears 35 and 36. In the example shown in FIG. 5, the gear 35 on the drive shaft side is the driven gear 36.
Since the driven shaft 41 is smaller than the drive shaft 42, the driven shaft 41 rotates at a lower speed than the drive shaft 42, and the bevel gear 32 similarly rotates. The folding roll pair 15 is then rotated at a rather low speed. This rotation can be set at a speed convenient for folding the 1/2 paper width signature so that it disappears from the table 14 as described above. When the clutch 38 is moved to the right, the friction member of the clutch and the friction member of the gear 33 engage with each other in the opposite manner to the above, and this causes the gears 34 and 32 to move toward the drive shaft 4.
The folding roll pair 15 is rotated by the power of the folding roll 15 as before.
is rotated. However, as shown in Figure 5, gear 3
3 is larger than the gear 34, the driven shaft 41 and hence the bevel gear 32 rotate at a higher speed than the drive shaft 42. The folding roll pair 15 is then rotated at a higher speed than in the previous case. This rotation can be set at a speed convenient for folding the 1/1 paper width signature so that it is submerged from the surface of the table 14 as described above. In other words, by using the gear switching mechanism including the latch, the rotation of the pair of folding rolls 15 can be made such that the folding roll pair 15 is prevented from colliding with the folding documents sequentially even when the width of the folding documents is 1/2 or 1/1. The speed can be selectively adjusted.

However, the speed adjustment mechanism for the folding rolls is not limited to the above, and it is naturally possible to incorporate, for example, a continuously variable transmission instead of the latch type gear switching mechanism as described above.

In this way, the rotational speed of the pair of folding rolls 15 can be adjusted continuously, which is convenient because it can cope with various changes in the paper width of the signature. As described above, in the present invention, since the rotational speed of the pair of folding rolls can be adjusted, folding can be carried out conveniently regardless of the horizontal dimension of the signature.

[Brief explanation of the drawing]

Fig. 1 is a top view of the conveyor, showing a short lateral length of a signature being sent on the conveyor;
Figures a, 2b, and 2c are vertical cross-sectional views taken perpendicular to the direction of conveyor travel, showing the situation in which a signature is folded by a folding roll, and Figure 3 is similar to Figure 1. Figures 4a, 4b, and 4c are similar to Figure 2, but in this case, a long lateral signature is being sent, and Figures 4a, 4b, and 4c are similar to Figure FIG. 5 is a diagram showing a situation in which a long-length document is folded by a folding roll, and FIG. , FIG. 6 is a side view of the vicinity of the folding roll and gearbox taken parallel to the traveling direction of the conveyor.

Claims (1)

[Claims] 1. A folding roll for folding paper traveling on a conveyor in a folding machine, the rotational speed of the folding roll being adjustable according to the lateral dimension of the paper to be folded. A folding roll characterized in that it includes a mechanism that makes it easier to fold. 2. According to claim 1, the folding roll is configured to include a clutch for adjusting the rotational speed of the folding roll to either high speed or low speed depending on the lateral dimension of the paper. A folding roll comprising a gear switching mechanism. 3 In claim 1, the configuration of the folding roll includes a continuously variable transmission so that the rotational speed of the folding roll can be continuously adjusted according to the lateral dimension of the paper. A folding roll comprising: