JP2678922B2 - Method and apparatus for making double-fold web signatures - Google Patents

Description

Description: FIELD OF THE INVENTION This invention relates to a method and apparatus for making two web signatures in a printing machine.

[Prior Art] Conventionally, in order to create a two-web signature, two lines of a paper feeding device, a printing device, a drying device, and a cooling roll device are arranged in parallel, and one of them has a turning process in the final step. The web was passed through the bar twice, and a double web was introduced into the folder to form a double web signature.

[Problems to be Solved by the Invention] However, arranging the above-described two systems of devices in parallel on the floor not only doubles the facility cost but also doubles the floor space, which is economically disadvantageous. There was a problem that In addition, the printed matter of the 2-web signature is not always printed, but it is often printed by using a single-system printing device, and it is economically disadvantageous to print by using the two-system printing device arranged side by side as in the past. There was a drawback that

The present invention has been made in view of the conventional problems, and an object of the present invention is to provide a method and a device for producing a signature of two webs for reducing the cost of equipment and reducing the floor space.

[Means for Solving the Problems] and [Operation] The present invention has the following means in order to solve the above problems.

In the method of making a signature of a double-layered web, one of the webs is fed, printed, dried, cooled, and printed,
In the next winding step, the above-mentioned printed web is wound up in a roll shape in advance, and the other web is printed through the air-supplying, printing, drying and cooling steps in the same manner as the above-mentioned step, and then is wound up first. It is characterized in that the web is fed to a folding machine that stacks two sheets to form a two-page folded signature.

The apparatus of the present invention is an offset rotary printing machine for a web, in which a paper feeding device, a printing device, a drying device, a cooling device, and a folding machine are arranged in this order, and a web winding function is provided between the cooling device and the folding machine. A winding / feeding device having a feeder function was provided.

The take-up / feeding device is composed of a swivel shaft rotatably supported at both ends on a roll stand, a pair of swivel arms movably fitted to the swivel shaft, and a pair of chucks attached to the tips of the swivel arms. The support shaft and the support shaft mesh with the gear train, and can be connected to either the electric motor or the powder brake through an electromagnetic clutch, and as a winding device when the support shaft and the electric motor are connected. Works,
When the support shaft and the powder brake are connected to each other, the paper feeding device is operated.

Examples Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows a side view of an apparatus using the method of the invention. In the apparatus, 1 is a paper feeding apparatus, and the apparatus is equipped with two webs 1a and 1b. The webs fed from 1a (also 1b) are printing devices of four colors and colors, printed webs. 1 comprising a drying device 3 for drying the sheet, a cooling roll device 4 for cooling the web, and a folder 5 for forming a signature.
It constitutes a web offset press.

As described above, two webs are attached to the swivel arm 13 of the sheet feeding device 1. One web is the web 1a and the other web is the web 1b. And in normal use, the printing webs are alternately supplied.

Furthermore, between the cooling roll device 4 and the folder 5,
A winding / paper feeding device 6 having a winding function and a paper feeding function is provided. The web previously supplied from the web 1a (or the web 1b) is passed through the paper feeding device 1, the printing device 2 and the cooling roll device 4 to the winding section side of the winding / paper feeding device 6, The web is wound up by the winding / feeding device 6 and one web is stocked in the winding / feeding device 6 as a winding paper roll. The web winding roll of the web stocked in the winding / feeding device 6 is used to cause the winding / feeding device 6 to function as a feeding device, and the web of the winding roll of the winding / feeding device 6 is folded. In addition to the above, the web 1b (or 1a) of the sheet feeding device 1 is separately supplied and then the web printed by the offset rotary printing machine is fed from the winding roll of the winding / feeding device 6. The folded web is introduced into the folding machine 5 so as to form a double-folded signature. A compensator roll device 7 for two webs is arranged at the introduction part of the folding machine 5, and the paths of the two webs can be adjusted individually. Since the compensator roll device 7 is a conventional technique, it is omitted. The folding machine 5 has a known structure and is constituted by a cutting cylinder, a folding cylinder and a chopper folding device.

FIG. 2 is a sectional view showing a section of the winding / feeding device 6.

The roll stands 10 and 10 are mounted on the rotary shaft 12 via the bearing 11.
Is rotatably supported, and a pair of revolving arms 13 is attached to the revolving shaft 12.
And a supporting shaft 14 having chucks 14a and 14a at the tips thereof is attached to the revolving arms 13 so as to face each other. Then, a sliding member (not shown) is attached to the support shaft 14 on the right side of the drawing, and a motor 16 that is rotationally driven via a gear that is slidable along the sliding member, a plurality of gears that mesh with the gear, and an electromagnetic clutch. It is installed on the swivel arm 13. A pneumatic cylinder 18 is fixedly mounted on the support shaft 14 on the right side, and the rod end of the pneumatic cylinder 18 and the support shaft 14 are rotatably coupled via a bearing. The turning shaft 12 on the left side of the drawing has a rack and a pinion meshing with the turning shaft 12 (not shown) meshes with each other.
Adjust the axial position of the web sandwiched between a and 14b.

 Next, the operation of the present apparatus will be described.

An electromagnetic clutch (not shown) of the winding / feeding device 6 is switched to operate as a winding device of this winding / feeding device, and the feeding device 1, the printing device 2, the drying device 3 and the cooling roll device 4 are operated. The passed web is wound up in advance and stocked in the winding / feeding device 6 as a winding roll.

Next, the web 1a (or 1b) is passed through each of the sheet feeding device 1, the drying device 3 and the cooling roll device 4, and the web roll stocked in the winding / feeding device 6 is the web roll. After passing through the compensator roll device 7, the webs from 1 to 5 are overlapped and fed as a two-ply web to the folding machine 5 to form a signature.

The winding / feeding device 6 has two functions of winding or feeding. That is, a gear train (not shown) and an electromagnetic clutch (not shown) are provided in the turning arm 13 on the side where the electric motor 16 and the powder brake 17 of the winding / feeding device 6 are attached. When the paper device 6 is operated as a winding device, the electromagnetic clutch is switched and the web 1a (or the web 1b) held by the pair of turning arms 13 is held.
Connecting the support shaft 14 for the electric motor 16 through the gear train,
The electric motor 16 rotates the support shaft 14 to wind the web.

When the winding / feeding device 6 is operated as a feeding device, the electromagnetic clutch in the revolving arm 13 is switched to move the support shaft 14 for the web 1a (or the web 1b) to the powder brake 17 via the gear train. The powder brake 17 controls the tension of the web to feed the web from the web winding roll.

When fixing the web core to the chucks 14a, 14a, the handle 15 is rotated to position the revolving arm 13 at a predetermined position, and the web core is mounted between the chucks 14a, 14a. Actuate 18 to press support shaft 14 against the web. On the contrary, when removing the core of the web, the above-mentioned operation may be performed in reverse.

In the above embodiment, the winding / feeding device is configured so that the electric motor and the powder brake are switched by the electromagnetic clutch in order to realize the winding function and the paper feeding function. Control may be performed so as to switch the two functions of the motor and the brake.

[Effects of the Invention] According to the "method and apparatus for making a signature of a double-layered web" of the present invention, two sheets are produced by an apparatus that reduces the equipment strike and the floor space as compared with the prior art. You can create folded web signatures.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.
The figure shows a front view of the winding / feeding device. 1: Paper feeding device, 2: Printing device 3: Drying device, 4: Cooling roll device 5: Folding machine, 6: Take-up / paper feeding device, 10: Stand 12: Swivel axis, 13: Swivel arm 14a: Chuck, 15: Handle 16: Electric motor, 17: Powder brake

Claims (3)

(57) [Claims] 1. A method for producing a signature of a double-layered web, wherein one of the webs is fed, printed, dried and cooled, and then printed, and the printed web is taken in the next winding step. It is wound in a roll shape in advance, the other web is fed through the same feeding, printing, drying, and cooling steps as the above steps, printed, and then stacked on top of the previously wound web and fed to the folder. A method of making a signature of a two-ply web, comprising forming a two-ply signature. 2. An offset rotary printing machine for a web, in which a paper feeding device, a printing device, a drying device, a cooling device and a folding machine are arranged in this order, and a web winding function is provided between the cooling device and the folding machine. An apparatus for creating a signature of a double-layered web, which is equipped with a winding / paper feeding device having a paper feeding function. 3. A swivel shaft rotatably supported at both ends on a roll stand, a pair of swivel arms movably fitted to the swivel shaft, and a pair of chuck-equipped support shafts attached to the tip ends of the swivel arms. The support shaft meshes with a gear train and can be connected to either an electric motor or a powder brake through an electromagnetic clutch, and when connected to the support shaft and the electric motor, it operates as a winding device, The winding / feeding device according to claim 2, wherein when the shaft and the powder brake are connected, the device operates as a feeding device.