JPH0713859U - Paper guide device for sheet-fed printing press - Google Patents

Abstract

(57) [Summary] [Purpose] To minimize the occurrence of folds and wrinkles in the printing paper supplied to the printing unit. A guide plate 25 having a recessed portion 25b extending in the width direction of the printing paper 6 is stacked and supported above the difference plate 21 having a recessed hole 21a extending in the width direction of the printing paper, and the recess hole 2 is formed.
1a and the recessed portion 25b are engaged with each other so that the folds and wrinkles of the printing paper 6 conveyed through this engagement portion are extended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper guide device for guiding a printing paper fed from a paper feeding device onto a difference plate to a leading end of the difference plate in a sheet-fed printing press.

[0002]

[Prior art]

 In the printing operation by the sheet-fed printing press, the printing papers (hereinafter referred to as papers) stacked on the paper stack of the paper feeding device are sucked one by one from the upper layer one by one at the suction port of the sucker, and then forward Be transported. Between the paper feeding device and the printing unit, a feeder board inclined so as to be lowered toward the front and a difference plate having the same slope as the feeder board are continuously supported in the paper conveying direction. The paper conveyed by the suction port of the sucker device is fed onto the feeder board by the rotation of the paper feed roller provided between the sucker device and the feeder board.

The paper fed onto the feeder board is conveyed by a plurality of paper feed tapes that run while being in contact with the surface of the feeder board and a paper feed roller that rotates while being in contact with the paper feed tape. It is fed onto the plate and is conveyed to the tip of the difference plate by the paper feed tape or the like. The paper comes into contact with a paper pad of a register device provided at the leading end of the slip plate to align the printing register in the top-bottom direction of the paper and stop. In addition, for the paper conveyed on the difference plate, the horizontal register device provided on one side in the width direction of the paper can align the printing registration in the left-right direction.

A swing device or the like is disposed between the difference plate and the printing unit, and the paper stopped by contacting the paper rest is conveyed by being gripped by the claws of the swing device or the like, and then conveyed. The paper is transferred to the nails of the printing cylinder such as the above and conveyed, and when the paper passes between the blanket cylinder and the impression cylinder, the image of the blanket cylinder is transferred and printing is performed.

A paper guide device for guiding the paper conveyed by the paper feed tape and the paper feed roller so as to come into contact with the paper contact is provided above the difference plate. As the paper guide device, there is one proposed by the present applicant and disclosed in Japanese Utility Model Laid-Open No. 142748/1990. Therefore, the outline thereof will be described below.

That is, this paper guide device is supported by a support shaft located above the difference plate and extending in a direction orthogonal to the paper transport direction, and is rotatable in parallel with the axial direction of the support shaft by an adjusting screw. In addition, the horizontal member of the guide plate is formed by a plurality of brackets that are screwed so as to be movable in the left-right direction and screwed, and a guide plate that is L-shaped and is supported by each bracket by an elastic plate material. Is extended in the paper transport direction close to the surface of the slip plate.

With this configuration, the paper fed onto the slip plate is conveyed while being guided by the horizontal member of the guide plate and the slip plate, and then comes into contact with the paper pad and stops. No creases or wrinkles on the paper.

In such a paper guide device, if the clearance between the flat surface of the guide plate and the flat surface of the difference plate is too large, the paper is rough and the registration accuracy is deteriorated. If the gap between the flat surface of the slip plate is too small, the printed surface of the paper may become dirty or damaged. Therefore, when the thickness of the paper is changed, the adjustment screw is loosened and the guide plate is rotated together with the bracket, so that the gap between the horizontal member of the guide plate and the flat surface of the difference plate is increased. The size of the paper is adjusted by loosening the adjustment screw and moving the bracket left and right on the support shaft when the size of the paper is changed. There is.

[0009]

[Problems to be solved by the device]

 However, in such a conventional sheet-fed printing press registering device, the guide plate and the adjusting screw for adjusting the guide plate are provided to reduce the folding and wrinkling of the paper according to the thickness and size of the paper. However, with the conventional configuration, it is not possible to expect a sufficient wrinkle removal effect, and in particular, wrinkles in the left and right directions of the paper cause good registration accuracy, and the pattern wavy. There is a problem that the quality of printed matter is reduced. FIG. 9 shows a perspective view of paper with insufficient wrinkle extension, and the paper 40 has wrinkles 40a.

The present invention has been made in view of the above points, and is a paper guide for a sheet-fed printing press capable of minimizing the occurrence of creases and wrinkles of the printing paper supplied to the printing unit. The purpose is to provide a device.

[0011]

[Means for Solving the Problems]

 In order to achieve such an object, according to the present invention, in the paper guiding device of the sheet-fed printing machine, which guides the printing paper fed from the paper feeding device onto the difference plate to the tip of the difference plate, the width of the printing paper is A guide means is provided that extends in the direction and guides the printing paper by making it concave or convex.

Further, in the invention according to claim 2, in the paper guiding device of the sheet-fed printing press which guides the printing paper fed from the paper feeding device onto the differential plate to the leading end of the differential plate, the printing paper is concave or A guide member is provided that is movable between an operating position where the printing paper is made convex and a retracted position where the printing paper is not made concave or convex.

[0013]

[Action]

 The paper fed onto the difference plate and conveyed on the difference plate is guided by the guide means and conveyed, so that no wrinkling occurs in the paper. When the fixing screw is loosened and the adjusting screw is tightened or loosened to move it back and forth, the guide moves and the gap between the guide and the difference plate is adjusted according to the thickness of the paper.

According to the second aspect of the present invention, when it is necessary to unfold the wrinkles of the paper, when the printing operation is started after the guide member is moved to the operating position, the paper is fed onto the difference plate and is placed on the difference plate. Since the paper conveyed through the paper is conveyed while being guided by the guide member, wrinkles do not occur on the paper.

When it is not necessary to unfold the wrinkles of the paper, the guide member is moved to the retracted position, and the paper is conveyed without being made concave or convex, and the conveyance is smoothly performed.

[0016]

【Example】

 1 to 3 show an example in which a paper guide device of a sheet-fed printing press according to the present invention is applied to a four-color printing sheet-fed press, FIG. 1 is a side view in the vicinity of a difference plate according to the present invention, and FIG. FIG. 3 is a perspective view of the paper after passing through the apparatus, and FIG. 3 is a schematic front view of a four-color printing sheet-fed printing machine embodying the present invention.

In FIG. 3, a four-color printing sheet-fed printing press 1 includes a paper feeding device 2, a four-color printing unit 3 and a paper ejection device 4, and the paper feeding device 2 is suspended by an elevating chain. A paper stacking board 5 is provided, and a paper stacking board 7 on which paper 6 is stacked is mounted on the paper stacking board 5. Reference numeral 8 is a suction port provided in the sucker device 9 for sucking the paper 6 one by one and conveying it forward.

Each printing unit 3 is provided with a plate cylinder 11, a blanket cylinder 12, and an impression cylinder 13 whose peripheral surfaces are in contact with each other, and near the plate cylinder 11, a plate on the plate cylinder 11 is provided. An ink supply device and a water supply device (not shown) for supplying ink and water to the are provided. Further, a transfer cylinder (not shown) or the like is arranged between the adjacent impression cylinders 13.

The paper discharge device 4 is provided with a paper stack 15 suspended by a lifting chain 14, and a paper stack plate 16 placed on the paper stack 15 has printed paper 6 is loaded. Reference numeral 17 is a cover provided on each printing unit 3 for opening and closing its work surface.

Between the paper feeding device 2 of the printing press 1 thus configured and the printing unit 3 for the first color, a feeder board 18 which is inclined so as to be lower toward the front is supported. A paper feed roller 19 and a plurality of paper feed rollers 20 that are in contact with the paper feed roller 19 and are arranged in parallel in the axial direction are provided behind the rear end of the feeder board 18.

By doing so, the paper 6 sucked by the suction port 8 of the sucker device 9 and conveyed forward is captured by the rotating paper feed roller 19 and the paper feed roller 20, and is placed on the feeder board 18. It is configured to be sent.

Therefore, the paper guide device according to the present invention will be described with reference to FIGS. 1 and 3. In the front of the feeder board 18 which inclines so as to become lower toward the front, a horizontally long rectangular plate-like difference plate 21 that inclines at the same inclination as this is provided between the left and right frames via a connecting plate (not shown). Is suspended in.

A lateral needle device (not shown) is provided at the tip of the difference plate 21, and the side edge of the paper 6 fed onto the difference plate 21 is pulled by a roller so as to contact the gauge. It is configured to align the lateral registration of the paper by and.

A support shaft 22 is installed above the rear end of the difference plate 21 with both ends thereof being supported by the left and right frames. The support shaft 22 is formed in a U shape and serves as a paper guide means. A plurality of brackets 24 constituting the paper guide device 23 are supported side by side in the axial direction of the support shaft 22.

On the bracket 24, a guide plate 25 formed by bending an elastic plate material in a V-shaped cross section and extending in the width direction of the printing paper is fixed by bringing the horizontal member 25 a close to the surface of the difference plate 21. At the center of the horizontal member 25a, a recessed portion 25b that engages with the recessed hole 21a formed on the surface of the difference plate is formed. The paper 6 is pressed between the recessed hole 21a and the recessed portion 25b to be deformed into a recessed shape, whereby the wrinkle is extended.

Reference numeral 26 denotes an adjusting screw that is screwed into a screw hole of the bracket 24 to fix the bracket 24 to the support shaft 22. By loosening the adjusting screw 26, the bracket 24 and the guide plate 25 support the support shaft 22. It is configured so that the clearance between the horizontal member 25a of the guide plate 25 and the surface of the difference plate 21 can be adjusted by rotating around 22.

Reference numeral 27 denotes a plurality of bearings pivotally supported so as to rotate between a position in which the distal end portion of the difference plate 21 is engaged and a position in which the difference plate 21 is retracted downward. Hold the top of the tip of 6 and align the top-bottom direction with the top of the paper. Further, when the front end of the paper 6 is gripped by the claws of the swing device, it is rotated downward to withdraw from the operating position.

The operation of the sheet-fed printing press configured as described above will be described. When the printing operation is started, the paper 6 stacked on the paper stack plate 7 on the paper stack 5 is sucked by the suction port 8 of the sucker device 9 and conveyed by the movement of the suction port 8 and the rotating paper feed roller 19 It is caught by the paper feed roller 20 and is fed onto the feeder board 18 by its rotation.

The fed-out paper 6 is conveyed by the running of the paper feeding tape stretched on the feeder board 18 and the rotation of rollers rotating in contact with the paper feeding tape, and passes through the connecting plate. It is sent and conveyed on the difference plate 21.

In this case, the paper 6 conveyed on the difference plate 21 is conveyed while being guided by the horizontal member 25a in the gap between the horizontal member 25a of the guide plate 25 and the surface of the difference plate 21. Since the flat member 25a and the difference plate 21 are provided with the recessed portion 25b and the recessed hole 21a that engage with each other, the flat member 25a and the difference plate 21 are transported through between the recessed portion 25b and the recessed hole 21a. The paper 6 is deformed into a concave shape, and is fed as a wrinkle-free paper 6 to the printing unit by the swing device as shown in the perspective view of FIG.

When the thickness of the paper 6 is changed, the adjusting screw 26 is loosened, and then the guide plate 25 is rotated together with the bracket 24 to adjust the clearance between the horizontal member 25 a and the surface of the difference plate 21. Corresponding to the thickness of the paper 6.

FIGS. 4 and 5 show an embodiment of the paper guide device according to claim 2, FIG. 4 is a side view of the paper guide device with the draft member in the retracted position, and FIG. FIG. 6 is a side view of the paper guide device shown with the member in the operating position. Members having the same configurations as those described with reference to FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

.. In the figure, a pin 30 that is planted in each of a plurality of sets of holders 29, one set of which is a pair of front and rear, is engaged with a long hole 28a provided in the difference plate 28 so as to be able to move forward and backward. A thin plate 31 extending in the width direction of the paper 6 is fixed to the upper end of the pin 30 protruding from the difference plate 28.

A compression coil spring 33 that biases the front and rear holders 29 in a direction of separating the front and rear holders 29 is provided on a spring shaft 32 slidably supported by the front and rear holders 29. Further, a concave hole 34a is formed in the guide plate 34 fixed to the same bracket (not shown) as the bracket 22 shown in FIG.

Further, below the concave hole 34a, a cam 35 formed in a half-moon shape and extending in the width direction of the printing paper is rotatably provided, and this cam 35 rotates this by 180 °. As a result, the arc portion is configured to engage with the recess hole 34a as shown in FIG. 5 or disengage from the recess hole 34a as shown in FIG.

With the above configuration, when the paper 6 is thick paper as shown in FIG. 4, the arc portion of the cam 35 is disengaged from the concave hole 34a and the cam 35 is retracted. Then, the thin plate 31 is expanded in a plane by the elastic force of the compression coil spring 33. By doing so, the thick paper 6 is conveyed without being wrinkled.

Further, when the paper 6 is a thin paper as shown in FIG. 5, when the cam 35 is rotated 180 ° from the state of FIG. 4, the arc portion of the cam 35 engages with the concave hole 34a. At this time, the thin plate 31 is deformed by the rotation of the cam 35 against the elastic force of the compression coil spring 33, and is pressed by the arc portion of the cam 35 to engage with the concave hole 34a. This is the same as in the first aspect of the invention in that the wrinkles of the paper 6 are expanded by doing so.

FIG. 6, FIG. 7 and FIG. 8 are side views in the vicinity of the difference plate showing another embodiment of the invention according to claim 1, and in this embodiment, the carrier paper 6 is placed on the difference plate 21. Air is used as the pressing means for pressing.

That is, in FIG. 6, air is blown toward the concave holes 21 a of the difference plate 21. Further, in FIG. 7, air is blown toward the concave hole 25c of the guide plate 25. Further, in FIG. 8, air is blown toward the ridge 21b formed on the difference plate 21 and having an arc-shaped cross section. In FIGS. 6, 7, and 8, the wrinkle-rolling of the conveyed paper is performed by the above-described configuration, which is the same as in each of the above-described embodiments.

[0040]

[Effect of device]

 As is apparent from the above description, according to the present invention, in the paper guiding device of the sheet-fed printing press that guides the printing paper fed from the paper feeding device onto the difference plate to the leading end of the difference plate, By providing a guide means that extends in the width direction of the printing paper and guides the printing paper in a concave or convex shape, the paper conveyed on the difference plate is pressed from above and below to have a concave or convex shape. Since the paper folds and wrinkles that occur when the paper is conveyed can be minimized, the print pattern does not wavy, the quality of the print is improved, and damage is reduced. The amount of paper generated is reduced.

According to the second aspect of the invention, in the paper guiding device of the sheet-fed printing press that guides the printing paper sent from the paper feeding device onto the difference plate to the leading end of the difference plate, the printing paper is concave. Or, by providing a guide member that is movable between the operating position that makes it convex and the retracted position that does not deform the printing paper into concave and convex, the paper conveyed on the difference plate is pressed from above and below. The creases and wrinkles that occur when the paper is conveyed can be minimized, so that the print pattern does not wavy and the quality of the print is improved. Improves and reduces the amount of waste paper generated.

[Brief description of drawings]

FIG. 1 is a side view near a difference plate in which the present invention is implemented.

FIG. 2 is a perspective view of the paper shown in a state after passing through the apparatus.

FIG. 3 is a schematic front view of a four-color printing sheet-fed printing press embodying the present invention.

FIG. 4 is a side view of the paper guide device in which the guide member is in the retracted position in the device according to the second aspect of the invention.

FIG. 5 is a side view of the paper guiding device shown in the second aspect of the present invention with the guide member in an operating position.

FIG. 6 is a side view in the vicinity of a difference plate showing another embodiment of the device according to claim 1.

FIG. 7 is a side view in the vicinity of a difference plate showing another embodiment of the device according to claim 1.

FIG. 8 is a side view in the vicinity of a difference plate showing another embodiment of the device according to claim 1.

FIG. 9 is a perspective view of the paper shown in a state after passing through a conventional paper guide device.

[Explanation of symbols]

 6 Paper 21 Difference Plate 21a Recessed Hole 21b Convex Strip 22 Support Shaft 23 Paper Guide Device 24 Bracket 25 Guide Plate 25a Horizontal Member 26 Adjusting Screw 28 Difference Plate 34 Guide Plate 34a Recessed Hole

Claims (2)

[Scope of utility model registration request] 1. A paper guide device of a sheet-fed printing press, which guides a printing paper fed from a paper feeding device onto a difference plate to a leading end of the difference plate, wherein the printing paper is extended in a width direction of the printing paper. A paper guide device for a sheet-fed printing press, comprising guide means for guiding the paper into a concave shape or a convex shape. 2. A paper guiding device of a sheet-fed printing press, which guides a printing paper fed from a paper feeding device onto a difference plate to a leading end of the difference plate, and an operating position for making the printing paper concave or convex. A paper guide device for a sheet-fed printing press, comprising a guide member that is movable between a retracted position that does not make the print paper concave or convex.