JPH0436915Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a paper threading device for a newspaper rotary press.

[Conventional technology]

Conventional paper threading devices for newspaper rotary presses are constructed by laying a flat belt in a loop shape along the most frequently used paper threading path (for example, for monochrome printing). The leading end of the printing paper wound on a roll installed in the paper feed section is inserted into the slit section, and the flat belt is rotated by a guide roller driven by a small motor or a rotary press to feed the paper. The leading edge of the paper roll is passed through a predetermined portion of the threading path.

By the way, the paper threading path needs to be changed to the optimal path according to a change in printing method such as a change from monochrome printing to multicolor printing, or a change in the set page, but in the above-mentioned conventional technology, one Only one paper threading route can be set for the paper feed section and one printing section, so when changing the paper threading route, it is necessary to manually thread the paper, which takes a lot of time and effort. It was necessary.

As a means of solving these drawbacks of the prior art, for example, as shown in Japanese Patent Application Laid-open No. 61-76368, a plurality of series of perforated belts each stretched on one side of the printing paper along a predetermined path has been proposed. a main body having an engaging portion with the printing paper; a connecting member having a connecting portion to the perforated belt protruding from both sides of the main body; and a grip change mechanism that selectively engages with the connecting member to change the grip, and the grip change mechanism changes the connection member when transferring printing paper from one series to another, for example. There is something I did.

[Problem that the invention attempts to solve]

However, in the means described in the above publication, a perforated belt with a plurality of long holes is used as the belt for conveying the printed paper, so for example, when switching the paper passing route of the printed paper between one series and two series, , the elongated holes of both belts must be controlled so that they are in the same phase and approach each other at the same speed.For this control, a sensor to detect the elongated holes must be provided, It is necessary to provide a control mechanism to drive the motor at a constant speed, which requires a large-scale control system. or,
The drawback is that the grip change mechanism has a complicated configuration and a large number of parts.

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to be able to freely set multiple paper threading paths, and in particular, to easily set up multiple paper threading paths without using a complicated control mechanism. To provide a paper threading device for a newspaper rotary press that can change a paper threading route and has a simple configuration.

[Means for solving problems]

In order to achieve the above-mentioned object, the paper threading device for a newspaper rotary press according to the present invention has a plurality of series of paper threaders each stretched along one side of the paper threading device along a plurality of paper threading paths assumed in advance. a belt or chain, a magnetic attraction part protruding from the side of the belt or chain, and an iron piece that is magnetically attracted to the magnetic attraction part, and a tab attached to the tip of the web. The present invention is characterized in that it includes an electromagnet that is provided in the vicinity of the belt or chain and moves the tab to a selected paper threading path, and a cylinder that moves the electromagnet up and down.

[Effect]

In the paper threading device of the newspaper rotary press having the above configuration, the iron piece of the tab attached to the leading end of the paper web is attracted to a magnetic suction part protruding from the paper threading belt or chain, so that the paper web and the belt are attached to each other. Or it can be connected to a chain instantly.
Further, when moving the web from one paper threading route to another, the tab is moved to the predetermined paper threading route by the suction force of the electromagnet that is moved up and down by the cylinder.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, FIG. 4 shows an example of a paper threading path in the paper threading device of a newspaper rotary press according to the present invention. In the figure, 1 is a roll of printing paper, 2 is a monochrome printing machine, and 3 is a multicolor printing machine. The machine and 4 are folding machines, and their configurations are no different from conventional equipment.

Reference numeral 5 denotes a flat belt as an endless body stretched from the web 1 to the folding machine 4 via the monochrome printing machine 2, and then stretched along the paper threading path formed in a closed loop over the web 1. , 6 is a belt drive device for driving this flat belt 5, 7...
are belt guide rolls provided at appropriate intervals.

Reference numeral 8 denotes a flat belt as an endless body stretched along a paper threading path formed in a closed loop shape so as to surround the multicolor printing machine 3;
10 is a belt drive device for driving the belt, and 10 is a belt guide roll provided at appropriate intervals.

Reference numerals 11 and 12 indicate path switching sections having the same configuration as each other (the configurations of the path switching sections 11 and 12 will be described later), which are provided in adjacent portions of the flat belts 5 and 8.

Incidentally, the flat belts 5 and 8 are connected to the path switching sections 11 and 1.
2, as well as other parts, are arranged so as not to come into contact with each other.

Next, the configuration of a paper threading device for a newspaper rotary press according to the present invention will be explained based on FIGS. 1 to 3.

In FIG. 1, reference numerals 13 indicate paper guide rolls, and these paper guide rolls 13 may be provided coaxially with some of the belt guide rolls 7..., 10....

Reference numerals 14 and 15 denote magnetic adsorption parts provided at the joint parts 5A and 8A of the flat belts 5 and 8, respectively. Permanent magnet 1
7 is attached thereto, and the magnetic attraction section 15 is made up of a permanent magnet 19 attached to the end of an attachment arm 18 held between flat belts 8a and 8b. In other words, the magnetic attraction parts 14 and 15 are made of the same material and have the same configuration. In this embodiment, the flat belt 5 has magnetic adsorption parts 14 and 14 in the vicinity of the web 1 and in the route switching part 12, respectively.
The flat belt 8 is provided with a magnetic attraction part 15 in the path switching part 11.

Reference numeral 20 denotes a tab made of synthetic resin that is attached to the tip end 1A of the paper roll 1 with an adhesive member 21 such as double-sided tape, and an iron piece is attached to the front end side of the tab 20 via a holding member 22 made of spring steel, for example. 2
3 is installed. This iron piece 23 is attracted and held by the magnetic attraction section 14 or 15.

Next, the configurations of the route switching units 11 and 12 will be explained. These route switching units 11 and 12 have the same configuration, and therefore, based on FIGS. 2 and 3, one route switching unit 11 I will only explain about.

24 is an electromagnet consisting of an iron core 25 and a coil 26, and the coil 26 is connected to a power source (not shown) via a switch (not shown). 27 is a cylinder such as an air cylinder that moves the electromagnet 24 up and down. When the iron piece 23 is attracted and held by the upper permanent magnet 17 and is located above the lower permanent magnet 19, the cylinder 27 is operated to raise the electromagnet 19, and then the coil 26 is energized to magnetize the electromagnet. When the electromagnet 24 is activated, the electromagnet 24 has an attractive force that allows the iron piece 23 to be moved downward toward the permanent magnet 19 side and held by the permanent magnet 19. shall be. still,
28 and 29 are belt guides, and the lower belt guide 29 has an appropriate opening 29a formed therein so that the electromagnet 24 can move up and down. In addition, in FIG. 4, 24' and 27' are the route switching units 12, respectively.
The electromagnet and cylinder are shown in the figure.

Therefore, in the paper threading device having the above configuration, now,
As shown in FIG. 1, a tab 20 is attached to the tip end 1A of the web 1 with an adhesive member 21, and an iron piece 23 provided on the tab 20 is attached to a magnetic attraction provided at the seam 5A of the flat belt 5. By attracting and holding the permanent magnet 17 of the part 14, the paper roll 1
The flat belt 5 holds the leading end 1A of the flat belt 5.

When performing monochrome printing, the route switching unit 11,
The electromagnet 24 in 12 is not energized, and the cylinder 27 is not operated.

When the belt drive device 6 is activated to run the flat belt 5 in a predetermined direction and speed, the leading end 1A of the web 1 held by the flat belt 5 runs along the paper threading path, allowing monochrome printing. However, since the electromagnet 24 and the cylinder 27 are inactive, the leading edge 1A of the web 1 reaches the folding machine 4 without changing its path. Thus, the paper threading work during monochrome printing is completed.

On the other hand, when performing multicolor printing after monochrome printing,
The magnetic attraction part 14 provided on the flat belt 5 reaches the path switching part 11, and as shown in FIGS. 2 and 3, the permanent magnet 17 on the flat belt 5 side is attached to the permanent magnet 19 on the flat belt 8 side. Stop the belt drive device 6 so that it is located directly above. In this state, cylinder 27
is driven to raise the electromagnet 24 so that the permanent magnet 19 on the flat belt 8 side located below comes into contact with the lower surface of the iron piece 23, and the coil 26 of the electromagnet 24 is energized. With this, the iron piece 23 is placed on the upper side (that is, on the permanent magnet 17 side).
Since the force of attracting the iron piece 23 downward (that is, toward the permanent magnet 19) is larger than that of the permanent magnet 19, the iron piece 23
It is attracted to the side and held by this permanent magnet 19. As a result, the leading end 1A of the web 1 is held by the flat belt 8, and the path is switched.

Now, when the belt drive device 9 is activated to run the flat belt 8 in a predetermined direction and speed, the leading end 1A of the web 1 held by the flat belt 8 runs along the paper threading path. , passes around the multicolor printing press 3 and reaches the route switching section 12 . Then, the belt drive device 9 is stopped so that the permanent magnet 19 on the flat belt 8 side is located directly above the permanent magnet 17 on the flat belt 5 side. In this state, the route switching unit 1
The cylinder 27' provided at the top of the iron plate 23 is driven to lower the electromagnet 24' so that the permanent magnet 17 on the side of the flat belt 5 located above comes into contact with the upper surface of the iron piece 23, and the coil of the electromagnet 24' Turn on electricity. As a result, the force that attracts the iron piece 23 upward (i.e., toward the permanent magnet 17) is greater than toward the downward side (i.e., toward the permanent magnet 19), so that the iron piece 23 is attracted to the permanent magnet 17. being attracted to the side,
It is attracted and held by this permanent magnet 17. As a result, the leading end 1A of the web 1 is held by the flat belt 5 again, and the path is switched.

Here, when the belt drive device 6 is operated again to run the flat belt 6 in a predetermined direction and speed,
The leading end 1 of the web 1 held by this flat belt 6
A travels along the paper threading path and reaches folding machine 4,
This completes the paper threading operation when performing multicolor printing after monochrome printing.

The present invention is not limited to the above-described embodiments, but can be implemented with various modifications.

For example, a chain may be used instead of the flat belts 5 and 8. Further, the magnetic attraction parts 14 and 15 may be provided at a portion other than the joint of the flat belt 58.

[Effect of idea]

As explained above, the paper threading device for a newspaper rotary press according to the present invention includes a plurality of series of paper threading belts each stretched on one side of the paper threading device along a plurality of paper threading paths assumed in advance. or a tab that includes a chain, a magnetic attraction part protruding from the side of the belt or chain, and an iron piece that is magnetically attracted to the magnetic attraction part, and is attached to the leading end of the web; Since it is provided with an electromagnet that is provided in the vicinity between the belts or chains and that moves the tab to a selected paper threading route, and a cylinder that moves the electromagnet up and down, it is possible to use a plurality of paper threading routes. It can be freely set, and the paper threading route can be easily changed without using a complicated control mechanism. The paper threading device according to the present invention has the advantage of being simpler in construction and cheaper than conventional devices of this type.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Fig. 1 is a perspective view showing the main parts of the paper threading device, Figs. 2 and 3 are sectional views and side views showing the configuration of the path switching section, and Fig. 4 is an example of the paper threading path to which the present invention is applied. FIG. 1...Wrap paper, 5,8...Flat belt, 14,1
5...Magnetic adsorption part, 17, 19...Permanent magnet,
20...tab, 23...iron piece, 24, 24'...
Electromagnet, 27, 27'... cylinder.

Claims (1)

[Scope of utility model registration request] Along the multiple paper threading paths assumed in advance,
A plurality of series of paper threading belts or chains each stretched on one side thereof, a magnetic attraction part protruding from the side of the belt or chain, and a paper threading part that is magnetically attracted to the magnetic attraction part. and
A tab attached to the leading end of the web, an electromagnet provided in the vicinity between the belts or chains for moving the tab to a selected paper threading path, and a cylinder for moving the electromagnet up and down. A paper threading device for a newspaper rotary press, characterized by: