JPH05301661A - Control system for paper passing device - Google Patents

Abstract

PURPOSE:To prevent paper from being torn or wound into a roller or the like at the paper passing time by connecting the rotation of a sprocket, provided at a paper passing chain travel path, by proximity switches to compute the moving position of a paper passing lever, and regulating the paper passing speed according to each computed moving position of the paper passing lever. CONSTITUTION:The slow-operating speed of a rotary press and the carrier speed of a paper passing lever 10 change when there is difference between the paper path length and the path length of the paper passing lever 10. Accordingly, the moving position of the paper passing lever 10 moved from the position at the time of starting transmission from proximity switches 37, 38 provided at the shaft of a sprocket SS is computed by counting the number of pulses transmitted from the proximity switches 37, 38, and the speed of the paper passing lever 10 in this computed position or in a block including this position is regulated by the accelerating or decelerating push button of a paper passing control panel 42. The paper passing speed of the paper passing lever in each moving position is then taught to a sequencer 40, and the paper passing lever is conveyed automatically at this speed from the following time on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention calculates a moving position of a paper threading bar in a paper threading device of a rotary press that performs paper threading by a paper threading bar conveyed by a pair of paper threading chains. The present invention relates to a control system that performs speed adjustment at a position.

[0002]

2. Description of the Related Art FIG. 4 shows a blanket-to-blanket type offset rotary press which uses a paper threading bar conveyed by a pair of paper threading chains. This rotary press comprises a paper feed section 1, an infeed section 2, a printing section 3 provided with four printing units, a drying section 4, a cooling section 5, a web path section 6 and a folding section 7. .. The paper threader is provided with a chain 8 which is provided inside the pair of frames of each of the above-mentioned units 1 to 7 or members equivalent thereto and forms a closed path.
The width of the leading edge of the paper roll installed in the paper feed unit 1 is determined by a paper threading bar (FIG. 6) provided at both ends with projections 11 that fit into the U-shaped grooves 9a of the attachment 9 attached to the attachment 9 (FIG. 5). The paper threading bar 10 with the
Various rollers G of the paper feed unit 1 and the infeed unit 2, the printing unit 3
Between the blanket cylinders B on the front and back sides, through the drying unit 4, the cooling cylinder C of the cooling unit 5 and various rollers G of the web path unit 6, and the drag roller 12 above the triangular plate of the folding unit 7 to the paper path. Carry along.

However, since the various rollers G include a roller that moves or swings, a roller provided with a special device such as a tension detecting device, a roller of a special device such as an edge guide or a silicon coating device, the paper threading is performed. The bar 10 does not necessarily follow the same path as the paper path. For convenience of explanation, among various rollers, a roller GS having sprocket S rotatably provided at both ends thereof, a roller not having G sprocket S, a sprocket rotatably supported by a shaft fixed to the frame SS and a chain 8 The sprocket provided on the return path is designated as RS (see FIGS. 1 to 10).
Next, as shown in FIGS. 8 and 9, the drive of the chain 8 is
It is performed by motors MF and MR provided in the infeed unit 2 and the cooling unit 5, respectively.

At the start of threading, both motors MF, MR
Is started, the paper threading bar 10 is carried by the chain 8, and at the same time, as shown in FIGS.
A pair of left and right paper feed rollers 14 supported so as to be able to rotate in contact with the roller GS ₁ of the paster arm 13 of the paper feeding unit 1 to bring the paper from the winding paper at the same conveyance speed as the paper passing bar 10. Feed at speed.

The arm 15 is rotated by an air cylinder 18 around a shaft 16 fixedly mounted on the frame of the sheet feeding unit 1, and the eccentric shaft 17 fixedly mounted on the shaft 16 and the arm 15 respectively has a sprocket SS. ₁ , a sprocket 19 and a sprocket 20 are rotatably attached, and a sprocket 21 fixed to the paper feed roller 14 is rotated. Therefore, since the sprocket SS ₁ is driven by the motor MF, the paper feed roller 14 is also driven.

In the paper threading by the paper threading device provided with the paper threading chain 8, the paper threading bar 10 and the paper feed roller 15 as described above, in FIG. _After attaching at the position before the entrance of ₁ and pasting the paper edge of the paper roll, press the automatic paper threading push button, the chain 8 starts to convey the paper threading bar 10, and the set position A
At several other places, the paper feed roller 14 contacts the roller GS ₁ and pulls out the paper from the web. The paper path in the paper feed section 1, the in-feed section 2, the cooling section 5, and the web path section 6 and the path of the paper passing bar 10 are shown in FIGS. 8, 9 and 10, respectively.

Next, the paper threading operation in each section will be described. (1) Paper feed unit 1 and infeed unit 2 (FIG. 8) Paper path: GS ₁ → G ₁ → GS ₂ → G ₂ → GS ₃ → GS ₄
→ GS ₅ → G ₃ → G ₄ → GS ₆ → G ₅ → GS ₇ → GS ₈
→ G ₆ → G ₇ → GS ₉ → GS ₁₀ → Go to printing section 3. Paper passing bar path: GS ₁ → SS ₁ → SS ₂ → SS ₃ → GS ₂ → S
S ₄ → GS ₃ → GS ₄ → GS ₅ → SS ₅ → SS ₆ → SS
₇ → SG ₆ → SS ₈ → SS ₉ → GS ₇ → GS ₈ → SS ₁₀
→ SS ₁₁ → SS ₁₁ → SS ₁₂ → GS ₉ → GS ₁₀ → Printer 3
What.

The solid lines in FIGS. 8, 9 and 10 are paper.
The path and the alternate long and short dash line indicate the path of the paper threading bar 10. (2) Cooling unit 5 and web pass unit 6 (FIGS. 9 and 10) Paper path: From drying unit 4 → C₁→ C₂→ C₃→ C_Four→ G₈
→ SG₁₁→ G₉→ G_Ten→ G₁₁→ G₁₂→ SG₁₂→ SG₁₃→
SG₁₄→ SG₁₅→ SG₁₆→ G₁₃→ SG₁₇→ SG ₁₈→ G₁₃
Turn bar or G₁₄To the direct route.

Paper threading bar path: From the drying section 4 → SS _13-
SS ₂₅ → S ₂₆ → SG ₁₁ → SS _{27 to} SS ₃₀ → SG ₁₂ → SG
₁₃ → SG ₁₄ → SG ₁₅ → SG ₁₆ → SS ₃₁ → SS ₃₂ → SG ₁₇
→ SG ₁₈ → Direct route (→ SS ₃₃ → SS ₃₄ →). (3) The return route is RS ₅ to RS _{8 from} RS ₁ to RS _{4 (} not shown) from the sprocket of the drag roller 21.
(Web pass section 6) → RS _{9 to} RS ₁₅ (Cooling section 5) → R
S _{16 to} RS ₂₂ (infeed section 2 and sheet feeding section 1) → GS ₁
The RS ₁₃ is driven by the motor MR.

As in the above-described path, the path of the paper and the path of the paper threading bar 10 are different, so that a difference occurs in both path lengths. Particularly in the cooling unit 5, since the path length of the paper threading bar 10 is longer than the path length of the paper from the outlet of the drying unit to SG ₁₁ , the limit switch 22 is provided at the outlet K of the chain of the sprocket SS ₁₃ and the sprocket SS ₂₅ A limit switch 23 is provided at the entrance L of the chain, and when the limit switch 22 is pressed by the paper threading bar 10, the speed of the chain 8 becomes faster than the paper feeding speed, and when the limit switch 23 is pressed, the speed is returned to the same speed. Chain 8 other than between the routes KL described above
And the paper feed speed are the same.

The hatched sprockets shown in FIGS. 8, 9 and 10 are used for independently threading the paper feed unit 1 and the infeed unit 2, or the cooling unit 5 and the web path unit 6, respectively. It is provided to form a closed passage of the chain 8.

[0012]

The above-mentioned prior art has the following problems. Since the speed of the paper threading chain and the paper feeding speed are the same, if the path length of the paper threading bar is different from the path length of the paper threading bar, if the path length of the paper threading bar is short, If the paper is too tight or too long, the paper may sag, the paper may be cut due to the too much tension, or the paper may be slackened and the paper may be caught in a roller or the like.

It is an object of the present invention to provide a paper threading device which prevents the paper from being broken or rolled up by a roller or the like at the time of paper threading.

[0014]

[Means for Solving the Problems] In order to prevent paper tension and slack that occur during threading, (1) a proximity switch is provided on the shaft of a sprocket provided in the chain travel path, and pulses transmitted from this proximity switch The moving position of the paper threading bar is calculated from the number, and the paper threading speed is adjusted according to this moving position. (2) Further, if necessary, the speed set according to each moving position of the paper passing bar is automatically taught.

[0015]

[Action]

(1) The moving position of the paper threading bar moved from the position at which transmission is started by the proximity switch provided on the sprocket shaft is calculated by counting the number of pulses transmitted by this proximity switch. The speed of the paper threading bar in the open position or in the section including this position is adjusted by the acceleration or deceleration push button of the paper threading operation panel so that there is no tension or slack in the paper. (2) If the sequencer is informed of the paper threading speed at each moving position of the paper threading bar obtained as described above, the paper threading bar is automatically conveyed at this speed from the next time.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the "paper threading device control system" of the present invention in the blanket-to-blanket type rotary offset printing press shown in FIG. 4 will be described with reference to FIGS. In the figure, 1 is a paper feed section, 2 is an infeed section, 3
Is a printing unit, 4 is a drying unit, 5 is a cooling unit, 6 is a web pass unit, 8 is a chain, 10 is a paper passing bar, 14 is a paper feed roller, 32, 33, 34 and 35 are limit switches, 3
6 is an electromagnetic solenoid, 37a and 37b are proximity pieces, 38
a and 38b are proximity pieces, 40 is a sequencer, 41 is a setting panel, 42 is an operation panel, GS is a sprocket roller, G is a sprocketless roller, SS is a sprocket mounted on a shaft, and RS is a chain return circuit. The sprockets, MF and MR are motors. The control system 31 includes limit switches 32 and 33 provided at an inlet P of the sheet feeding section 1 and an outlet Q of the infeed section 2 for detecting the start and end positions of the threading, and an inlet R of the cooling section 5.
And limit switches 34 and 35 provided at the exit S of the web path unit 6, and the air cylinder 18 in which the paper feed roller 14 provided in the paper feed unit ₁ is attached to and detached from the roller GS _1.
Proximity pieces 37a and 37b attached to the electromagnetic solenoid 36 for controlling the operation of the sheet feeding section 10 (see FIG. 7), the sprocket SS ₃ of the sheet feeding section 1 and the sprocket SS ₁₃ of the cooling section 5, respectively. , Proximity piece 37
Proximity switches 38a and 38b fixed to the frame in conjunction with a and 37b, a paper threading motor M
F (paper feed unit 1) and MR (cooling unit 5), these motors MF
MR inverter 39, sequencer 40 setting panel 4
1 and an operation panel 42 to which various push buttons for paper threading are attached. The operation panel 42 has automatic, forward, reverse,
Stop, acceleration and deceleration push buttons are attached.

Next, the paper threading by the above system will be described. A. Paper threading between the paper feed section 1 and the infeed section 2: (1) A position where the paper threading start limit switch 32 operates by operating the forward and reverse push buttons of the operation panel 42,
Alternatively, the projection 11 of the paper threading bar 10 is fitted into the U-shaped groove 9a of the attachment 9 of the chain 8 at a position slightly before this operating position and set on the chain 8 (see FIGS. 5 and 6). (2) The paper end fed from the paper roll is adhered to the paper passing bar 10. Next, press the prepared push button on the main panel (not shown) of the rotary press and press the automatic push button on the operation panel 42 after the circuit for preparing the rotary press is established. The lamp lights up and the rotary press rotates at a slow speed. At the same time, the paper threading chain 8 starts to continuously convey the paper threading bar 10 by the motor MF (see FIG. 8) that rotates at the paper threading speed. The slow speed of the rotary press and the transport speed of the paper passing bar 10 are set to be the same. However, as described in (4) below, the transport speed depends on the paper path length and the path length of the paper passing bar 10. When there is a difference between and, it changes. (3) At the position set on the setting panel 41, for example, at the inlet P position of the paper feed unit 1, the electromagnetic solenoid 36 (electromagnetic valve) operates, the paper feed roller 14 contacts the roller GS ₁ , and the paper is wound from the paper roll. The paper is sent out at the transport speed (paper threading speed) of the threading bar 10 (see FIG. 8). The attachment / detachment of the paper feed roller 14 can be performed at a position other than the point P. (4) By pressing the speed-up and speed-down push buttons while the chain 8 continuously carries out the paper threading bar 10,
The transport speed (chain speed) can be increased or decreased. This acceleration / deceleration is performed in the section where the paper path length and the path length of the paper passing bar 10 are different. At this time, the transport speed set for each section becomes the next paper threading speed. Paper threading bar 1 in this section
The position of 0 is set by the rotating proximity piece 37a (37b).
The number of pulses generated from the proximity switch 38a (38b) is calculated by the sequencer 40, and the calculated value indicates the distance that the paper threading bar 10 has moved from the position where the pulse generation is started.

The paper threading path is divided into a plurality of paths (up to 10 paths), and the position of the start point of each divided section is preset by the setting panel 41. Therefore, the paper threading bar 10 in the section determined by the position of the paper threading bar 10
The transport speed of can be increased or decreased and set. It should be noted that, in order to minimize the distance error of the count by making the timing of starting threading by the limit switch 32 and the timing of starting pulse generation by the proximity switch 37a as close as possible, as shown in FIG. Wrap the raised part of the
Is designed to be short. (5) When the limit switch 33, which is provided at the exit Q of the infeed unit 2 and located at the paper threading end position, operates, the chain 8 stops. When the paper is subsequently passed through the printing unit 3 and the drying unit 4, the limit switch 33 is kept inactive. The limit switches 22 and 23 used in the past are removed. In general, the paper path of the printing section 3 and the drying section 4 is a single straight path, so the paper is removed from the paper threading bar 10 at the exit Q and manually passed, and the paper threading bar is again passed from the inlet R of the cooling section 5 as described below. In some cases, the paper is threaded at 10.

B. Paper threading in the cooling unit 5 and the web path 6: (6) In the same manner as in the above item (1), the paper threading bar 10
Is set on the chain 8. (7) In the same manner as in the above item (2), the paper threading bar 10
Is a paper threading speed (conveying speed) and the rotary press starts to rotate at a slow speed. When the paper feed section 1 continuously feeds the in-feed section 2, the printing section 3 and the drying section 4, the paper threading bar 10 set on the chain 8 in the paper feed section 1 is cooled by the cooling section 5. It is conveyed to the entrance R of (see FIG. 9). (8) The speed of the paper threading bar 10 is increased or decreased in the same manner as in the item (4). Since there are several sections in which the path length of the paper and the path length of the paper passing bar 10 are different, especially in the cooling unit 5, the entire paper passing path of the cooling unit 5 and the web path unit 6 is divided into a plurality of sections. The conveyance speed of the paper threading bar 10 is changed. A maximum of 10 start points can be set for each section (see Fig. 3). (9) When the limit switch 35, which is provided at the exit S of the web path 6 and detects the end position of the paper threading, is pushed by the paper threading bar 10 in the same manner as in the above item (5) (see FIG. 10),
The chain 8 stops. SG ₁₈ is a drag roller with a slitter, and the paper is divided into half widths by the slitter and runs on each path, or it is divided into various paths such as going straight at full width without slitting, so the limit switch 3
The paper threading bar 10 is stopped at 5 and the paper is moved to the paper threading bar of the various paths. However, when going straight, the paper threading bar 10 travels as it is. Once the speed in each paper threading path section is set as described above, the set speed is automatically taught to the sequencer 40 (teaching), and the paper threading from the next time is performed at this taught speed. It

Next, the setting panel 41 is provided with a setting on / off switch 42, a changeover switch 43 for changing over between the paper feed roller position and the acceleration / deceleration position, and a setting push button 44. The setting data is cleared and input as follows. The ON / OFF point of the paper feed roller 14 or the clearing of the acceleration / deceleration point (starting point of the divided section of the paper passing path) turns the setting ON / OFF switch 42 to “OFF”.
Then, the changeover switch 43 is set to the paper feed roller position or the acceleration / deceleration position and the setting push button 4 is pressed. Paper feed roller 1
For inputting the ON / OFF point or the acceleration / deceleration point of 4, the setting ON / OFF switch 42 is set to “ON”, the changeover switch 43 is set to the paper feed roller position or the acceleration / deceleration position, and the paper threading bar 10 is set to the chain 8 before the start of counting. Set on the chain 8
When the paper feed roller 14 reaches the operation (on / off) point or the changed starting point, the setting push button 44 is pressed.

[0021]

The control system of the paper threading device according to the present invention is applied to a rotary press that performs paper threading by a paper threading bar having both ends attached to a paper threading chain running inside a pair of frames and running in a closed path. In the paper threading device, the rotation position of the sprocket provided on the paper threading chain travel path is counted by a proximity switch to calculate the moving position of the paper threading lever, and the moving position of the paper threading bar is calculated according to the calculated moving position. The following effects can be obtained by adjusting the paper threading speed.

In a section where there is a difference between the paper path length and the paper threading bar path length, the conveyance speed of the paper threading bar is increased or decreased to eliminate the tension and slack of the paper at the time of paper threading, and to prevent paper breakage, paper winding, etc. It can be prevented. Further, by providing the automatic teaching function, once the speed of the paper threading bar is set for each section, the paper threading from the next time can be automatically performed at the taught speed. ..

[Brief description of drawings]

FIG. 1 is an operation system diagram of an embodiment of the present invention.

FIG. 2 is a relationship diagram between a paper threading start timing and a pulse generation timing in FIG.

FIG. 3 is a diagram showing a change in a paper passing bar transport speed for each section of a divided paper passing path.

FIG. 4 is a side view of the layout of a blanket-to-blanket offset press.

FIG. 5 is a plan view of the paper threading chain.

FIG. 6 is a side view of the paper threading bar.

FIG. 7 is a diagram of a paper feed roller and its drive system.

FIG. 8 is a path diagram of paper and a paper passing bar (chain) in a paper feeding unit and an infeed unit.

FIG. 9 is a path diagram of the paper and the paper passing bar (chain) of the cooling unit.

FIG. 10 is a path diagram of the paper and the paper passing bar (chain) of the web path unit.

[Explanation of symbols]

 32 limit switch 33 limit switch 34 limit switch 35 limit switch 36 electromagnetic solenoid 37 proximity switch 38 proximity switch 40 sequencer 41 setting panel 42 operation panel

Claims (1)

[Claims] 1. A paper threading device of a rotary press, wherein a paper threading bar is provided at both ends inside a pair of frames and runs in a closed path. It is characterized in that the rotation position of the sprocket provided at the position is counted by a proximity switch to calculate the moving position of the paper threading lever, and the paper threading speed is adjusted according to each calculated moving position of the paper threading bar. Control system for paper threading device.