JPH0539945U - Paper threading device for web-fed rotary printing press - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a paper threading device that facilitates threading of paper in the middle of the paper path and paper threading in the middle of the paper path. [Structure] A limit switch 1 provided at a point E between blocks of a printing machine divided into a plurality of blocks 1 to 7.
Operation panel 12 having selection branches corresponding to 1A to 11G
The paper threading end point is selected by operating the switch to control the position of the pulling member 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a web threading device for a web-fed rotary printing press.

[0002]

[Prior Art]

 In general, newspaper rotary presses and the like are equipped with an automatic paper threading device in order to speed up and omit the paper threading work performed at the time of switching jobs or cutting paper while driving.

In this automatic paper threading device, conventionally, a paper threading belt is provided from the paper feed section to the folding section along the paper path, and the standard positions of the start point and the end point of the paper threading are fixed.

Therefore, when the web threading is started from a point other than the standard start point, that is, a point in the middle of the paper path, the web pulling member waiting at the standard start point is moved to that position. While checking, the operator had previously moved to the desired starting point by operating the manual button.

When the paper is threaded up to a point other than the standard end point, that is, a point in the middle of the paper path, the traction member reaches the desired end point while checking the position of the traction member during the paper threading operation. At times, the operator stopped the tow member by operating a manual button.

In this case, since it is necessary to mechanically feed the web being threaded, the drive roller on the upstream side of the paper path from the desired end point is rotated in conjunction with the paper threading operation. The drive roller on the downstream side of the paper path from the end point needs to stop the web on the downstream side, so to stop it, it is necessary for the operator to preliminarily cut the magnet clutch that controls this by cutting it manually. there were.

[0007]

[Problems to be solved by the device]

 As described above, in the conventional paper threading device, most of the paper threading work from the middle of the paper path or the paper threading up to the middle of the paper path relies on the manual button operation by the operator, which imposes a heavy burden on the operator.

In particular, when there is only one operation panel and the panel position is separated from the desired start point or desired end point, the operator must reciprocate between the two positions, or There was a problem that the burden on the operator would be enormous because it would require two people to work.

Therefore, an object of the present invention is to provide a paper threading device which facilitates paper threading from the middle of the paper path and paper threading to the middle of the paper path.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the structure of the present invention is characterized in that in a web threading device of a web-fed rotary printing press, a web threading start point selecting means having a plurality of selection branches along a paper path is provided. ..

Further, the paper threading device of the web-fed rotary printing press is characterized in that a paper threading end point selecting means having a plurality of selection branches along the paper path is provided.

Further, in the paper threading device of the web-fed rotary printing press, a plurality of paper threading end point selecting means having a plurality of selection branches along the paper path are provided along the paper path.

[0013]

[Action]

 According to the above configuration, by selecting a desired start point by the paper threading start point selecting means, the pulling member is automatically stopped at the start point, and the threading operation is prepared. Further, by selecting a desired end point by the paper threading end point selecting means, the pulling member is automatically stopped at the aforementioned end point. Furthermore, the operation of selecting the paper threading start point is omitted, and the operation of the operator reciprocating both positions of the operation panel and the paper threading start point or the paper threading end point is omitted, and the paper threading work is performed quickly.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 is a schematic configuration diagram of an offset rotary press showing a first embodiment of the present invention, and FIG. 2 is a front view of the same operation panel.

As shown in FIG. 1, the offset rotary press includes a paper feeding unit 1, an feeding unit 2, a printing unit 3, a drying unit 4, a cooling unit 5, a web path unit 6, and a folding unit 7 in the order of printing. A belt 8 is laid endlessly along the paper path from the paper feeding unit 1 to the folding unit 7.

The belt 8 is driven by a motor 9 separately from the machine, and a pulling member 10 for pulling the web is fixed at one position thereof.

Then, along the laying route of the belt 8, limit switches 11A to 11G for detecting the position of the pulling member 10 are provided for each part of the machine, and an operation panel 12 for automatic paper threading is installed in the machine. It is integrally arranged on the main operation panel 13 of the machine installed on the side.

As shown in FIG. 2, the operation panel 12 is provided with a preparation button 51 for outputting a drive signal to the motor 9, a start button 52 and a return button 53, and the limit switches 11A to 11A. A start point selection switch 54 for selecting the start point of the threading by the 11G and an end point selection switch 55 for selecting the end point are provided.

It should be noted that the letters i to i in FIG. 1 are the start and end points of the paper threading respectively set corresponding to the limit switches 11A to 11G.

Next, the operation of the printing section 3 will be described by taking the paper threading as an example. First, the operator selects a start point “printing unit” corresponding to a desired sheet threading start section (in this case, between the infeed section 2 and the printing section 3) with the start point selection switch 54 on the operation panel 12, When the preparation button 51 is pressed, the motor 9 is activated, and the pulling member 10 waiting at the origin a starts to move and eventually contacts the limit switch 11C arranged near the paper threading start point C. As a result, the limit switch 11C issues a stop signal to the motor 9, and as a result, the traction member 10 stops at the paper threading start point C.

Subsequently, the operator attaches the front end of the web to the pulling member 10 at the paper threading start portion, and then uses the end point selection switch 55 on the operation panel 12 to set the desired paper threading end portion (in this case, the printing unit 3). When selecting the end point “dryer” corresponding to (between the drying section 4) and pressing the start button 52, the motor 9 is started, while the machine is started in conjunction with this. At this time, in the machine, all the clutches that control the drive rollers upstream of the preselected end point D are in the engaged state, and all the clutches that control the drive rollers downstream of the selected end point D are in the disengaged state. Is set.

Then, the web on the upstream side of the paper threading start point C is fed to the drive roller in the paper path while being pulled by the pulling member 10 at the tip thereof, so that excessive tension that causes paper breakage is generated. Move forward without occurring. On the other hand, the drive roller is stopped in the web downstream of the end point D of the paper threading, so it is not fed and stays in the state before the threading.

After that, the pulling member 10 comes into contact with the limit switch 11D arranged in the vicinity of the paper passing end point D. As a result, the limit switch 11D issues a stop signal to the motor 9, and as a result, the pulling member 10 stops at the paper threading end point D, and the machine also stops in conjunction with this.

Subsequently, the operator separates the pulling member 10 and the upstream web at the paper threading end portion, then bonds the upstream web and the downstream web, and presses the return button 53 on the operation panel 12. The motor 9 is activated, the traction member 10 starts moving, and eventually contacts the limit switch 11A arranged near the origin (i). As a result, the limit switch 11A issues a stop signal to the motor 9, and as a result, the traction member 10 returns to the original point B. In this way, a series of paper threading work is completed.

FIG. 3 is a schematic configuration diagram of an offset rotary press showing a second embodiment of the present invention, and FIG. 4 is a front view of the same operation panel.

The operation panel in the first embodiment described above is provided for each part of the machine (12A to 12G are the operation panels in the figure), and the start point selection switch 54 (see FIG. 2) is provided on the panel. ) Is not provided.

Since the other structure is the same as that of the first embodiment, the same members and parts as those in FIGS. 1 and 2 are designated by the same reference numerals and the description thereof will be omitted.

With this configuration, for example, when performing the paper threading of the printing unit 3, first, the operator places the paper at the desired paper threading start unit (in this case, between the infeed unit 2 and the printing unit 3). When the preparation button 51 on the operation panel 12C provided is pressed, the motor 9 is activated, and the traction member 10 waiting at the origin a starts to move, and eventually, the limit is provided near the paper threading start point c. Touch the switch 11C. As a result, the limit switch 11C issues a stop signal to the motor 9, and as a result, the traction member 10 stops at the paper threading start point C.

Subsequently, the operator attaches the front end of the web to the traction member 10 at the paper threading start section, and then uses the end point selection switch 55 on the operation panel 12C to select a desired threading end section (in this case, the printing section). When the end point "dryer" corresponding to (3 to drying section 4) is selected and the start button 52 is pressed, the motor 9 is started, and the machine is started in conjunction with this. At this time, in the machine, all the clutches that control the drive rollers upstream of the preselected end point D are in the engaged state, and all the clutches that control the drive rollers downstream of the selected end point D are in the disengaged state. Is set.

Then, the web on the upstream side of the paper threading start point C is fed to the drive roller in the paper path while being pulled by the pulling member 10 at its leading end, so that an excessive tension that causes paper breakage is generated. Move forward without occurring. On the other hand, the drive roller is stopped in the web downstream of the end point D of the paper threading, so it is not fed and stays in the state before the threading.

After that, the pulling member 10 comes into contact with the limit switch 11D arranged in the vicinity of the paper passing end point D. As a result, the limit switch 11D issues a stop signal to the motor 9, and as a result, the pulling member 10 stops at the paper threading end point D, and the machine also stops in conjunction with this.

Subsequently, the operator separates the pulling member 10 from the upstream web at the paper threading end portion, then bonds the upstream web and the downstream web together, and presses the return button 53 on the operation panel 12D. The motor 9 is activated, and the pulling member 10 starts moving, and eventually contacts the limit switch 11A arranged near the origin (i). As a result, the limit switch 11A issues a stop signal to the motor 9, and as a result, the traction member 10 returns to the origin. In this way, a series of paper threading work is completed.

In each of the above-described embodiments, the limit switches 11A to 11G are not provided as means for detecting the position of the pulling member 10 and generating a stop signal to the motor 9, and the moving distance of the belt 8 is detected. (For example, the number of rotations of the motor 9 is detected by an encoder and converted into a distance, or the time from the start of the motor 9 is measured by a timer and converted into a distance.) A control means for issuing a stop signal may be provided. Further, although the belt 8 is used as the rotating body, it is not limited to this and a chain or the like may be used.

Further, the present invention is not limited to the endless type paper threading device using the rotating body as in the above-mentioned embodiment, but is found in Japanese Patent Laid-Open No. 3-106746 and Japanese Utility Model Laid-Open No. 1-103647. It can also be applied to such an open loop type paper threading device. By the way, in Japanese Patent Laid-Open No. 3-106746, the position of the web stock paper carrier from the downstream side to the upstream side of the paper threading path is controlled by the drive unit that reversely drives the paper threading members pooled in the paper threading member pool section. Up to the paper threading member guide, the web material is locked to the paper locking member of this paper threading member (corresponding to the pulling member 10 of the above-mentioned embodiment), and then the drive unit is operated in the forward direction to move the paper. There is a paper threader in which a web material is threaded along a paper threading body guide by running the threading body from the upstream side to the downstream side of the paper threading path. A guide rail is laid along the path, and a drive body is provided in a notch formed in this guide rail so as to be separated from the guide rail by a predetermined distance so that the guide rail can be driven to reciprocate in the guide rail. The tip of the web is connected to the running body. Each of them is provided with a clip (corresponding to the pulling member 10 in the above-described embodiment) that detachably holds the connected paper connection adapter.

[0035]

[Effect of the device]

 As described above, according to the present invention, since the means for selecting the paper threading start point and the means for selecting the paper threading end point are provided, the position of the traction member can be automatically controlled, and the paper threading operation is successful. It will be easier and the burden on the operator will be reduced.

Further, by providing a means for selecting a paper threading end point for each block of the machine, the operation of selecting the paper threading start point can be omitted, and both the operation panel and the paper threading start point or the paper threading end point can be omitted. The operator does not have to reciprocate the position, and the paper threading operation can be performed quickly.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an offset rotary press showing a first embodiment of the present invention.

FIG. 2 is a front view of an operation panel of the same.

FIG. 3 is a schematic configuration diagram of an offset rotary press showing a second embodiment of the present invention.

FIG. 4 is a front view of the operation panel of the same.

[Explanation of symbols]

 8 Belt 9 Motor 10 Traction member 11A-11G Limit switch 12, 12A-12G Operation panel 55 End point selection switch

Claims (4)

[Scope of utility model registration request] 1. A paper threading device for a web-fed rotary printing press, comprising a paper threading start point selecting means having a plurality of selection branches along a paper path. 2. A paper threading device for a web-fed rotary printing press, comprising a paper threading end point selecting means having a plurality of selection branches along a paper path. 3. A paper threading device for a web-fed rotary printing press, wherein a plurality of paper threading end point selecting means having a plurality of selection branches along the paper path are provided along the paper path. 4. A web threading machine for a web-fed rotary printing press according to claim 2, wherein the drive roller on the upstream side of the selected paper threading end point is driven and the drive roller on the downstream side is stopped. apparatus.