JPS638152A - Automatic splicer for rotary press - Google Patents

Abstract

PURPOSE:To reduce the residual quantity of a feed roll, by detecting a running speed in paper feeding, a revolving speed of the roll and paper thickness, while outputting a signal when the residual quantity comes to the specific value, and connecting a sheet of printing paper of a stand-by roll to that of the feed roll. CONSTITUTION:At a low end of a pair of arms 1 and 1, a feed roll 3 is supported by a shaft 4, and at an upper end, a stand-by roll 5, supplied the feed roll 3 with printing paper, is supported by a shaft 6. A shaft 2 is rotated together with these rolls 3 and 5 as one body by a motor 8. At one end of the shaft 4, there provided with a measuring plate 9 which detects a revolving speed of the feed toll. And, in a running route of the printing paper, there is provided with a sensor, finding a running speed of the printing paper. A controller starts a splicer 17 with a predrive motor 16 when a residual quantity in the roll 3 comes to the specified value by the revolving speed of the roll 3, the running speed of the printing paper and paper thickness found separately, whereby the printing paper of the stand-by roll 5 is bonded to that of the roll 3. With this constitution, the residual quantity of the roll 3 can be set to the limited number, thus economical efficiency is improved.

Description

Detailed Description of the Invention (Field of Near Industrial Application) The present invention relates to an automatic paper splicer that connects printed paper on a paper feed roll to printed paper on a standby roll to continuously supply printed paper to a printing machine. Regarding equipment.

(Prior art) In rotary printing, printing paper is pulled out from a paper feed roll through a guide roller to a printing section, and a strip of printing paper (...
The paper is printed continuously and then cut.

Then, when the remaining amount of printing paper on the paper feed roll becomes low, connect the printing paper on the paper feed roll to the printing paper on the standby roll, and then use the standby roll as a paper feed roll to feed paper to the printing section. I make sure that there is no interruption. For this reason, in conventional rotary printing presses, a paper feed roll is set at one end of an arm that rotates within a predetermined range, and a standby roll is set at the other end, so that the winding diameter of the paper feed roll becomes less than a predetermined value. For example, if this is detected with an optical lens, the base arm of the paper splicing device is activated while rotating the arm to adhere the printed paper on the paper feed roll to the edge of the printed paper on the waiting roll, and then press it with a brush. The paper feed roll is cut using a cutter, and thereafter the standby roll is replaced with the paper feed roll, and the old feed roll is replaced with a new standby roll.

(Problems to be Solved by the Invention) The conventional paper splicing device described above detects the winding diameter of the paper feed roll, and operates the paper splicing device when this winding diameter becomes less than a predetermined value. However, even if the roll diameter is the same, if the thickness of the paper feed is thick, the remaining amount will be small, and if the thickness of the paper feed is thin, the remaining amount will be small. The preparation time for paper splicing is shortened, and the remaining paper length is reduced in the case of thin paper.
This increases the amount of il and is uneconomical.

(Means for Solving the Problems) - In order to solve the recording/recording point, the present invention does not depend on the winding diameter of the paper feed roll, but on the running speed of the paper feed, the rotation speed of the paper feed roll shaft, and the paper thickness. Activate the base τ paper splicing device J: Sea urchin.

(Function) Compile the paper feed running speed, paper feed roll shaft rotation speed, and paper thickness. -Paper feed I by inputting in the evening]
4. Calculate the remaining amount of 1-ru and set this remaining amount as the predetermined value. : =
)/, sometimes activates the paper splicing device.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a paper feeding section to which a paper splicing device according to the present invention is applied, and FIG. 2 is a side view of the same paper feeding section.

A pair of arms 1, 1 are rotatably supported by a shaft 2 in the paper feed section, and a paper feed roll 3 for feeding printing paper to the printing machine is supported by a shaft 4 between the lower ends of the pair of arms 1, 1. A standby roll 5 wound with printing paper connected to the printing paper of the paper feed roll 3 is supported by a shaft 6 between the upper ends thereof.

Note that the rolls 3 and 5 and the shafts 4 and 6 rotate integrally.

The shafts 2 of the arms 1, 1 are rotated by a Tanabata 8 fixed to the frame 7, and a third shaft is provided at the ends of the shafts 4, 6.
As shown in the figure, the disk 9 on the right side of the measuring plate 9a is removed (((
The rotational speed of this disk 9 is determined by a proximity lens 10.
I am trying to detect it with . That is, the rotation speed of the shaft 4 of the paper feed roll 3 while paper is being fed to the printing machine is detected by the proximity lens 10.

Further, the printing paper 11 wound around the paper feed roll 3 is
As shown in the figure, the paper is sent to the printing machine via a large number of guide rollers 12...12, and these guide rollers 12...1
A gear 13 is attached to one of the drive rollers 12a as shown in FIG.
The detection ports 1/I with 4a are engaged, and the detection roller 1
The rotational speed of 4 is detected by the proximity lens 15.

I) The traveling speed of the printing paper fed to the printing machine is detected by the proximity sensor 15.

On the other hand, a predrive tab 16 is provided above the paper feed section, and this predrive tab 16 rotates the standby roll 5 during M splicing.

Further, a paper splicing device 17 equipped with a paster arm, a brush, and a cutter is disposed near the pre-drive motor 16. This splicing device 17 is activated by a signal from the control Il device N.

FIG. 5 is a control block diagram, and the control device includes a comparator,
-'' component [1-ra etc. are incorporated, and the said proximity lens →
The signals from J--10 and 15 and the paper thickness of the printing paper 11 are input)].

Then, the signal from the proximity sensor 10.15 is compared depending on the paper thickness, and when the value reaches a predetermined value, an activation signal is output to the predrive motor 16 and the paper splicing device 17. Here, if the printing paper 11 is thick, a signal is output when the rotation speed of the shaft 4 of the paper feed roll 3 is slow, and if it is thin, a signal is output after the rotation speed of the shaft 4 becomes faster. In this way, the length of the printing paper remaining in the paper feed [1-3] is set so that the length of the printing paper remaining in the paper feed [1-3] is constant relative to the paper 19.

An output signal from the control device 17 causes the predrive motor 16 to rotate the standby roll 5, and adjust the speed of the printing paper wound around the standby roll 5 and the speed of the printing paper sent out from the paper feed roll 3. In this state, the paster arm and brush adhere the printed paper on the paper feed roll 3 and the printed paper on the standby roll 5, and then the cutter pastes the paper from the paper feed roll 3 on the downstream side of the adhesive part. Cut the printing paper 11.

Thereafter, the arm 1.1 is rotated 1800 times, the standby roll 5 is used as a paper feed roll, and the used paper feed roll is replaced with another new standby roll in preparation for the next paper roll.

〔Effect of the invention〕

As explained above, the paper splicing device according to the present invention compares the traveling speed of the paper feed with the rotational speed of the shaft of the paper feed roll, and also uses the paper thickness as a control element to wind the paper onto the paper feed roll. Since the paper splicing device starts operating when the remaining length of printed paper to be spun is always a constant length regardless of paper thickness, the preparation time for paper splicing can be set just in time. In addition, it is economical because the amount remaining on the paper feed roll can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of a paper feeding section to which a paper splicing device according to the present invention is applied, Fig. 2 is a side view of the same paper feeding section, and Figs. 3 and 4 are enlarged views of main parts of the same paper feeding section. , FIG. 5 is a control block diagram of the paper splicing method. 1... Arm, 3... Paper feed roll, 5... Standby roll, 10.15... Proximity sensor υ-111... Printing paper, 12... Guide roller, 17... Control Device. Applicant's agent Mr. Sato Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A paper feed roll and a standby roll are attached to the arm, and when the amount of printing paper remaining in the paper feed roll is low, the printing paper on the paper feed roll is connected to the printing paper on the standby roll to continuously feed the printing paper. In the paper splicing device, the paper splicing device is operated by a signal from a control device, and the control device uses the running speed of the paper feed, the rotation speed of the paper feed roll shaft, and the paper thickness as control parameters, An automatic paper splicing device for a rotary printing press is characterized in that it outputs a signal when the remaining amount of printing paper wound around a paper feed roll reaches a predetermined length.