JP2008007243A - Sheet guide device for sheet-fed printer and sheet-fed printer using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet guide device for a sheet-fed printer capable of conveying a sheet stably and preventing the sheet from being damaged. <P>SOLUTION: This sheet guide device is provided with at least one guide 35 arranged so as to extend in the direction of conveyance of a sheet 9 along a sheet conveyance path of a chain gripper 19 and having a space part 41 extending in the direction of conveyance on an inner side, an endless belt 37 having a traveling path along the sheet conveyance path including a part engaged with the space part 41 of the guide 35 and moving along it and moving peripherally at substantially equal speed to that of the sheet 9 in the same direction as that of the sheet 9, and a suction means 39 engaged with the space part 41. The endless belt 37 has a protruding part 53 having smaller width than that of a protrusion 10 onto a chain gripper 19 side from the guide 35 and is provided with a plurality of communicating holes 57 communicating with the space part 41 at an interval in the longitudinal direction on a guide face 55 opposing to the sheet 9 in the protruding part 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet guiding apparatus for a sheet-fed printing machine and a sheet-fed printing machine using the sheet guiding apparatus.

In the paper discharge unit of the sheet-fed printing machine, the sheet printed by the printing unit is transferred from the impression cylinder to the chain gripper and conveyed to the paper discharge table. At this time, since the chain gripper only holds the leading end of the sheet, the entire chain tends to undulate greatly as it travels.
Due to this undulation, the sheet may rub against the surrounding members, and the sheet may be scratched or soiled.

To prevent this and convey the sheet in a stable posture, for example, as shown in Patent Document 1, a guide is provided along the sheet conveyance path, and air is blown from the guide surface to guide the sheet while floating. There is something to do.
However, since the behavior of the sheet changes when conditions such as the paper thickness, paper size, or printing speed change, it is necessary to adjust the air ejection amount, speed, etc. each time. Due to this adjustment, it takes time to prepare for printing, and a lot of paper is lost.
Even with such adjustment, it is not possible to completely prevent the sheet from fluttering and contacting the guide due to fluctuations in conditions during the printing operation.
In particular, it becomes a big problem when guiding a printing surface that is not sufficiently dried, such as duplex printing.

In order to solve this problem, as disclosed in Patent Document 2, a rod guide is provided between an air jet guide and a chain gripper that guides when a sheet flutters. .
In order to guide a printing surface that is not sufficiently dry like double-sided printing, the bar guide is provided so as to extend along the non-picture part, i.e., the center and both ends of the sheet. It has been.

Japanese Patent Laid-Open No. 11-138752 JP 2002-240977 A

However, as shown in Patent Document 2, since the bar guide is installed at both ends in the width direction of the sheet, when the sheet flutters, the end of the sheet can come off from the bar guide and come into contact with the guide. There is sex.
For this reason, it was insufficient to reliably prevent the sheet from being scratched or soiled.

  In view of the above problems, an object of the present invention is to provide a sheet guide apparatus for a sheet-fed printing machine that can stably convey a sheet and prevent damage to the sheet, and a sheet-fed printing machine using the sheet guiding apparatus. To do.

In order to solve the above problems, the present invention employs the following means.
That is, the printing press according to the present invention is a sheet guide device for a sheet-fed printing press that guides a sheet conveyed by a chain gripper, and extends in the sheet conveyance direction along the sheet conveyance path of the chain gripper. The sheet conveying path including at least one guide member having a space portion extending in the conveying direction on the inside and a portion engaging with the space portion of the guide member and moving along the space portion. And a belt member that circulates at a substantially equal speed in the same direction as the seat, and an air suction means that engages with the space portion, the belt member including the guide member A protrusion having a width narrower than the dove width protruding to the chain gripper side, and a guide surface facing the seat of the protrusion has a plurality of communication portions communicating with the space portion. Wherein the holes are provided at intervals in the longitudinal direction.

According to the present invention, the guide member and the belt member are installed such that the protruding portion of the belt member is located at the dove position along the sheet conveyance direction in the sheet conveyed by the chain gripper.
The belt member that moves around has a movement path along the sheet conveyance path that includes a portion that engages with and moves along the space portion of the guide member. Therefore, the guide member is disposed where the guide member is disposed. Is moving along.
When the belt member engages with the guide member and moves, the belt member protrudes from the guide member toward the chain gripper, so that the guide surface of the protruding portion moves opposite to the sheet conveyed by the chain gripper. .

When the air suction means is operated, air is sucked from the space portion of the guide member, so that a suction force acts on the guide surface of the belt member through the communication hole communicating with the space portion.
The rear end portion of the sheet conveyed by the chain gripper is held by the belt member by the suction force acting on the guide surface. Since the width of the guide surface is smaller than the width of the dove, the picture part is not held, that is, is not contacted.
At this time, since the belt member moves in the same direction at a speed substantially equal to that of the sheet, the sheet is stably conveyed in a fixed posture while being held by the belt member.
For this reason, since the fluttering pattern portion of the sheet does not come into contact with the periphery, it is possible to prevent the sheet from being damaged.
In addition, even if conditions such as paper thickness, paper size, or printing speed change, the sheet can always be stably conveyed in a constant posture, making it easy to adjust each time the condition is changed and printing preparation time. In addition, the amount of damaged paper can be reduced.

Here, “dob” refers to an extra drop margin other than the effective print area that inevitably occurs in the sheet size and printing imposition. The width of the dove is generally about several mm to 10 cm. The dove is provided in the width direction and the conveyance direction, and is provided in both end portions and / or the central portion, respectively.
Accordingly, it is preferable that three guide members are provided because both sides of the sheet can be held.

  In the printing press according to the present invention, the guide member is movable in the width direction.

  Thus, since the guide member is movable in the width direction, when the size of the sheet is changed, the guide member can be easily adjusted to the dove position by moving in the width direction.

  In the sheet guide device for a sheet-fed printing press according to the present invention, a guide pulley is provided at a downstream end in the sheet conveyance direction in the movement path of the belt member, and the guide pulley moves in the sheet conveyance direction. It is made possible.

Thus, the shaft member is provided with a guide pulley at the downstream end in the sheet conveying direction in the moving path of the belt member, and the guide pulley is movable in the sheet conveying direction. The moving path of the belt member can be adjusted according to the position of the vacuum wheel whose position in the sheet conveyance direction is adjusted.
Thereby, since the sheet can always be guided to the vicinity of the vacuum wheel by the belt member, the gap between the vacuum wheel and the belt member can be minimized, and flapping of the sheet generated by this gap can be prevented.
In this case, it is preferable that the guide pulley is configured to move integrally with a vacuum wheel that brakes a sheet provided on the downstream side in the sheet conveying direction.
In this way, since the position adjustment of the vacuum wheel and the belt member can be performed together, the adjustment can be simplified.

  The sheet guide device of the sheet-fed printing press according to the present invention is characterized in that the guide pulley is configured to exert an air suction force on the communication hole of the belt member passing through an upper position thereof. To do.

Thus, since the guide pulley is configured to exert an air suction force on the communication hole of the belt member passing through the upper position, the guide pulley can be used as a vacuum wheel.
Thereby, since a vacuum wheel can be omitted, the structure can be simplified and the cost can be reduced.

  In the sheet guide device for a sheet-fed printing press according to the present invention, the guide member is formed of a plurality of divided guide members arranged in series in the sheet conveying direction, and the belt members are respectively provided on the divided guide members. Is provided.

As described above, the guide member is formed of a plurality of divided guide members arranged in series in the sheet conveying direction, and each of the divided guide members is provided with the belt member. The moving speed of the belt member can be individually adjusted.
For example, when the sheet holding position of the chain gripper is displaced from the movement path of the chain gripper, the movement speed of the sheet differs depending on the curvature of the movement path of the chain gripper. The belt member can be set in a substantially constant range, and the moving speed of the belt member can be set to a speed corresponding to the moving speed of the sheet.
As a result, each belt member can be moved at substantially the same speed as the sheet, so that the sheet is stably conveyed in a fixed posture while being held by each belt member.
For this reason, since the fluttering pattern portion of the sheet does not come into contact with the periphery, it is possible to prevent the sheet from being damaged.

  In the sheet guide device of the sheet-fed printing press according to the present invention, a guide pulley is provided at the downstream end in the sheet conveying direction in the movement path of the belt member provided in the most downstream divided guide member. The guide pulley is movable in the sheet conveying direction.

As described above, the guide pulley is provided at the downstream end in the sheet conveying direction in the moving path of the belt member provided in the most downstream divided guide member, and the guide pulley is movable in the sheet conveying direction. Therefore, the movement path of the belt member can be adjusted in accordance with the position of the vacuum wheel whose position in the sheet conveyance direction is adjusted according to the length of the sheet.
Thereby, since the sheet can always be guided to the vicinity of the vacuum wheel by the belt member, the gap between the vacuum wheel and the belt member can be minimized, and flapping of the sheet generated by this gap can be prevented.
In this case, it is preferable that the guide pulley is configured to move integrally with a vacuum wheel that brakes a sheet provided on the downstream side in the sheet conveying direction.
In this way, since the position adjustment of the vacuum wheel and the belt member can be performed together, the adjustment can be simplified.

  In the sheet guide device for a sheet-fed printing press according to the present invention, the guide pulley is configured to exert an air suction force on the communication hole of the belt member that passes through an upper position thereof. To do.

Thus, since the guide pulley is configured to exert an air suction force on the communication hole of the belt member passing through the upper position, the guide pulley can be used as a vacuum wheel.
Thereby, since a vacuum wheel can be omitted, the structure can be simplified and the cost can be reduced.

  A sheet-fed printing press according to the present invention includes the sheet guide device for a sheet-fed printing press according to any one of claims 1 to 9.

  As described above, in the sheet-fed printing press according to the present invention, the sheet guide device that can stably convey the sheet in a constant posture is used. Prevents damage to the skin.

  A sheet-fed printing press according to the present invention includes a chain gripper that is provided in a sheet conveyance path from a printing unit to a paper discharge unit and that conveys a printed sheet, and a sheet conveyance direction along the sheet conveyance path. And a belt member that is provided so as to be in sliding contact with the guide member and that moves in the conveyance direction in synchronization with the sheet conveyance speed as the sheet is conveyed. The belt member is provided with a groove-like space portion on the sliding surface of the guide member and has a plurality of openings that open to a guide surface that communicates with the groove-like space portion and faces the sheet. It has a communication hole and has an air suction means for sucking air in the groove-like space.

  In this way, the portion of the sheet conveyed by the chain gripper that faces the communication hole of the guide member is sucked through the groove-shaped space provided on the guide member sliding contact surface of the belt member, thereby sucking the sheet. Since the sheet is held by the guide surface of the guide member during conveyance, flapping of the sheet can be effectively suppressed.

According to the present invention, since the fluttering pattern portion of the sheet does not contact the periphery, it is possible to prevent the sheet from being damaged.
In addition, even if conditions such as paper thickness, paper size, or printing speed change, the sheet can always be stably conveyed in a constant posture, making it easy to adjust each time the condition is changed and printing preparation time. In addition, the amount of damaged paper can be reduced.

Below, the double-sided / single-sided sheet-fed printing machine (printing machine) 1 concerning one Embodiment of this invention is demonstrated using FIGS.
FIG. 1 is a schematic diagram illustrating a schematic configuration of the sheet-fed printing press 1.
The sheet-fed printing press 1 includes a sheet feeding device (not shown), a plurality of printing units 5, and a paper discharge device 7 from an upstream side to a downstream side to which a sheet as a printing material is supplied.
The paper feeding device 7 is a unit that picks up the sheets 9 stacked on a paper feeding table (not shown) one by one in order from the top and sequentially supplies them to the printing device 5 in the next process.

  A plurality of printing units 5 are provided for each color to be printed. In this embodiment, a four-color machine that prints with four colors consisting of C (cyan), M (magenta), Y (yellow), and BL (black) is shown. Therefore, a total of eight printing units 5 (not shown) are provided.

Each printing unit 5 includes a plate cylinder 11, a rubber cylinder 13 disposed opposite to the plate cylinder 11, an impression cylinder 15 disposed opposite to the rubber cylinder 13, and the impression cylinder 15 of each printing unit 5. An intermediate cylinder 17 is provided.
Here, in an area adjacent to the peripheral surface of the plate cylinder 11, an inking device (not shown) and a dampening device are installed so as to face each other.

The inking device is provided with a plurality of ink rollers, and sequentially supplies ink from the ink fountain where ink is stored to the plate cylinder 11 side.
The dampening device includes a plurality of rollers and supplies dampening water stored in the water boat to the plate cylinder 11 side.

The plate cylinder 11 has a cylindrical shape in which a printing plate on which a printing image is formed is wound around the outer periphery. A printing plate is created and exchanged for each image to be printed.
Although not shown, the plate cylinder 11 is in a state where a part of the angular range of the outer periphery is cut out in the axial direction, and at this position, the plate head which is the upstream end of the printing plate and the downstream side of the printing plate. A plate clamping device for holding and fixing the plate bottom as an end is provided.

The rubber cylinder 13 receives the ink on the printing plate of the plate cylinder 11 and transfers the ink to the sheet passing between the impression cylinder 15 (offset printing). A blanket made of an elastic material such as rubber is wound around the outer periphery of the rubber cylinder 13.
Although not shown, the rubber cylinder 13 is in a state where a part of the angular range of the outer periphery is cut out in the axial direction, and a pair of gripping and fixing the upstream end and the downstream end of the blanket at this position. A rubber-clad shaft is provided.

The impression cylinder 15 is disposed opposite to the rubber cylinder 13 and has a cylindrical shape. The impression cylinder 15 is a so-called double cylinder tailoring having a diameter twice that of the plate cylinder 11 and the rubber cylinder 13.
On the peripheral surface of the impression cylinder 15, claw devices (not shown) for holding the front end of the sheet 9 are provided at two locations across the axis center. The impression cylinder 15 contacts the rubber cylinder 13 through the sheet 9 during printing, and applies a desired pressure to the sheet 9 supplied between the impression cylinder 15 and the impression cylinder 15. As a result, the ink on the rubber cylinder 13 is transferred onto the sheet 9.

The intermediate cylinder 17 is provided between the impression cylinders 15 of the printing units 5 and has a cylindrical shape. The intermediate cylinder 17 is a so-called double cylinder tailoring having a diameter twice that of the plate cylinder 11 and the rubber cylinder 13 except for the one on the sheet feeding device 3 side.
On the peripheral surface of the intermediate cylinder 17, claw devices (not shown) for holding the front end of the sheet 9 are provided at two positions with the axis center in between. The sheet 9 is fed from the upstream impression cylinder 15 to the downstream impression cylinder 15 by the intermediate cylinder 17.

The inking device, the dampening device, the plate cylinder 11, the rubber cylinder 13, the impression cylinder 15 and the intermediate cylinder 17 described above are one main motor (provided in the sheet-fed printing press 1 so that their peripheral speeds are substantially the same. (Not shown).
That is, the rotational force from the main motor is transmitted to each member via the gear.

  The paper discharge device 7 includes an endless chain 21 provided with a chain gripper 19 that grips the sheet 9 as a means for transferring the printed sheet 9, a paper discharge table 25 suspended from the chain 23, and the paper discharge table A blower fan 27 disposed above 25 and a sheet guide device 29 are provided.

The endless chain 21 is stretched between a paper discharge shaft 31 adjacent to the impression cylinder 15 and a paper discharge end shaft 33 installed at a position above the downstream end of the paper discharge table 25.
An IR lamp 22 that heats the surface of the sheet 9 and dries the ink is provided inside the track of the endless chain 21 so as to face the conveyance path of the sheet 9.
In the endless chain 21, the chain gripper 19 passes through the lower side of the paper discharge shaft 31 and moves obliquely upward, moves the upper position of the paper discharge table substantially horizontally, rotates from the lower part to the upper part of the paper discharge end shaft 33, It is driven to return to the upper part of the paper shaft 31.

The sheet 9 is transferred from the impression cylinder 15 to the chain gripper 19 that rotates around the paper discharge shaft 31 and is separated from the chain gripper 19 in front of the paper discharge end shaft 33.
From the paper discharge shaft 31 to the front of the paper discharge end shaft 33 forms a conveyance path for the sheet 9.
The paper discharge table 25 is configured to be movable in the vertical direction, and stacks and holds the sheets 9 discharged from the chain gripper 19.
The chain 23 is controlled so as to gradually move down the sheet discharge table 25 so that the falling distance of the sheet 9 is substantially constant.

The sheet guiding device 29 will be described with reference to FIGS. FIG. 2 is a schematic diagram illustrating an overall schematic configuration of the sheet guide device 29. FIG. 3 is an enlarged perspective view showing a portion of the sheet guide device 29 that conveys the sheet end. FIG. 4 is a perspective view showing another structural example of the transport portion. 5 is a cross-sectional view taken along line XX in FIG. 2, and FIG. 6 is a cross-sectional view taken along line YY in FIG.
As shown in FIG. 2, the sheet guide device 29 includes a guide (guide member) 35, an endless belt (belt member) 37, and suction means 39.
The guide 35 is a long material having a shape in which an open part having a concave cross section has a bulge directed inward, and a space portion 41 communicating in the longitudinal direction is formed. (See Figs. 3 and 5)

The guide 35 extends from the lower portion of the paper discharge shaft 13 to the upstream end portion of the paper discharge tray 25 and is disposed substantially parallel to the endless chain 21.
The open portion of the guide 35 is arranged so as to face the endless chain 21, and a plurality of through holes 43 are provided on the lower surface opposite to the guide 35 at predetermined intervals along the longitudinal direction.
The predetermined interval between the through holes 43 is set to be at least the minimum length of the sheet 9 to be used.
As shown in FIG. 5, three guides 35 are provided in the width direction.
The three guides 35 are installed at positions corresponding to the dove 10 (the non-printing portion without the pattern portion 8) provided in the conveyance direction of the sheet 9.
The width of the dove 10 varies depending on the printing conditions, but is at least several mm.

A bracket 45 is attached to the lower surface of the guide 35 at a substantially middle portion in the longitudinal direction. A screw shaft 47 provided extending in the width direction is screwed to the bracket 45, and the guide 35 is configured to move in the width direction when the screw shaft 47 is rotated by a drive source (not shown). Has been.
For example, if the position of the central dove 10 does not change in the sheet 9 used, the central guide 35 may be fixedly attached.
Further, for example, when the width of the sheet 9 to be used is small, the guides 35 on both sides may not be used or installed.

The endless belt 37 is formed of an elastic material having heat resistance, for example, silicone rubber, fluorine rubber, or the like. The endless belt 37 has a convex cross section, and a groove 49 having a substantially semicircular cross section is provided over the entire length on the inner peripheral surface which is a surface in sliding contact with the guide 35.
The wide portion 51 on the inner side of the endless belt 37 is fitted into the space portion 41 of the guide 35, and the outer protruding portion 53 protrudes from the space portion 41 toward the endless chain 21.
Since the bulge above the guide 35 is engaged with the outside of the wide portion 51 of the endless belt 37, the endless belt 37 can be guided so as not to move outward even at a concave curve portion around the paper discharge shaft 31.

The outer surface of the protrusion 53 forms a flat guide surface 55. A plurality of communication holes 57 for communicating the guide surface 55 and the groove 49 are provided at intervals in the longitudinal direction of the endless belt 37.
The interval between adjacent communication holes 57 is set smaller than the interval between adjacent through holes 43.
The width of the guide surface 55 is, for example, 5 to 10 mm, and is smaller than the width of the dove 10 provided on the printed sheet 9.

The endless belt 37 has a movement path formed by a plurality of guide pulleys 59, a movement guide pulley 61, and a drive guide pulley (guide pulley) 63.
The guide pulley 59 is provided at a fixed position and guides a return path on the opposite side of the guide 35 of the endless belt 37.
The moving guide pulley 61 is attached to a return path opposite to the guide 35 of the endless belt 37 so as to move in a direction substantially orthogonal to the guide surface 55 of the endless belt 37. The moving guide pulley 61 functions to adjust the tension of the endless belt 37 and adjust the length of the endless belt 37 along the conveying direction of the sheet 9.

The drive guide pulley 63 is installed at the most downstream position of the endless belt 37 in the sheet 9 conveyance path.
The drive guide pulley 63 is provided with a movable shaft 65, a rotary piece 67, and a drive gear 69.
The rotation of the movable shaft 65 is limited, and the movable shaft 65 is provided so as to be movable in the conveyance direction and the axial direction of the sheet 9. The movable shaft 65 is provided with a branching portion 71 that branches upward.
The movable shaft 65 and the branch portion 71 are provided with a hollow portion 73 communicating with a suction source (not shown).

The rotary piece 67 has a hollow cylindrical shape, and is provided with a fitting groove 75 on the circumferential surface of which the wide portion 51 inside the endless belt 37 is fitted.
The rotary piece 67 is attached to the movable shaft 65 so as to be rotatable and restricted in movement in the axial direction, and its inner peripheral surface is in contact with the outer peripheral portion of the branch portion 71. A plurality of through-holes 77 are provided in the bottom portion of the fitting groove 75 at intervals in the circumferential direction at positions where the branch groove 71 is engaged.
The drive gear 69 is attached to the movable shaft so as to be rotatable and restricted in axial movement, and the side surface is fixed to the rotary piece 67.
The drive gear 69 is rotationally driven by an intermediate gear 79 that is driven by a drive source (not shown).

The suction means 39 includes a suction pump 81, a cushion tank 83, and a plurality of suction pipes 85.
The plurality of suction pipes 85 communicate the cushion tank 83 and the through hole 43 of the guide 35 and suck air from the space portion 41 through the through hole 43 by the negative pressure of the cushion tank 83.
If the suction pipe 85 is branched into a plurality and connected to a plurality of adjacent through holes 43, the suction pipe 85 can be prevented from congesting and the suction force can be leveled.

Further, as shown in FIG. 4, a duct 87 may be provided under the guide 35 over substantially the entire length thereof.
The duct 87 has a U-shaped cross section, and its opening is fixedly attached to the lower surface of the guide 35.
The side surface of the duct 87 is provided with a plurality of through holes 89 to which suction pipes 85 are connected at intervals in the longitudinal direction.
Since the interval between the adjacent through holes 89 is larger than that of the through holes 43, for example, twice, the number of suction pipes 85 can be reduced accordingly.

The operation of the sheet-fed printing press 1 according to the above-described embodiment will be described.
First, the printing operation of the sheet-fed printing press 1 will be described.
The sheets 9 are taken out one by one from a sheet feeding device (not shown) and supplied to the printing unit 5.
When the supplied sheet 9 passes between the rubber cylinder 15 and the impression cylinder 17 of the first four printing units 5, four colors are printed on one surface. After that, when the sheet 9 printed on one side passes through the four printing units 5 located on the downstream side, four colors are printed on the other side. The sheet 9 on which double-sided printing is performed in this way is sent to the paper discharge device 7.

The double-side printed sheet 9 is replaced with a chain gripper 19 that winds the paper discharge shaft 31 from the impression cylinder 15 of the last printing unit 5.
The chain gripper 19 moves along the track of the endless chain 21 with the leading end 91 of the sheet. The sheet 9 conveyed by the chain gripper 19 is removed from above the paper discharge tray 25, dropped, and stacked on the paper discharge tray 25.
At this time, powder is sprayed on the lower sheet 9 in order to prevent undried ink from appearing on the back of the upper sheet 9.

Next, the operation of the sheet guide device 29 will be described.
The drive guide pulley 63 is moved in the conveyance direction of the sheet 9 so that the drive guide pulley 63 is positioned slightly upstream from the position of the rear end portion 93 of the sheet 9 on which the drive guide pulley 63 is stacked. At this time, the track length of the endless belt 37 is adjusted by moving the position of the moving guide pulley 61.
Further, the three guides 35 are rotated in the width direction by rotating the screw shaft 47 and are positioned at positions corresponding to the positions of the dove 10 on the printed sheet 9. Accordingly, the position in the width direction of the endless belt 37 is also positioned along the guide 35.

The drive guide pulley 63 is driven by a drive source (not shown), and the endless belt 37 moves along the guide 35 at a speed substantially equal to that of the chain gripper 19.
Further, the suction pump 81 is driven to suck the air in the space portion 41 of the guide 35 through the cushion tank 83 and the suction pipe 85.
This suction force acts on the guide surface 55 of the endless belt 37 that moves through the groove 49 and the communication hole 57.

The leading end 91 of the sheet 9 held by the chain gripper 19 moves in the direction of the paper discharge tray 25 as the chain gripper 19 moves. On the other hand, the rear end portion 93 of the seat 9 moves in a posture that hangs down slightly. Since a suction force acts on the sheet 9 from the guide surface 55, the rear end portion 93 side of the sheet 9 is attracted to the guide surface of the endless belt 37.
Therefore, as shown in FIG. 2, the seat 9 has the leading end portion 91 held by the chain gripper 19 and the rear end portion 93 side held by the guide surface 55 of the endless belt 37. Is conveyed downstream in accordance with the movement.
Since the endless belt 37 holds the center portion and both end portions of the seat 9, it is possible to reliably prevent the seat 9 from flapping. Further, it is possible to suppress a downward drop (positional deviation) or the like of the sheet 9.

Since the width of the guide surface 55 is smaller than the width of the dove 10 of the sheet 9, the pattern portion 8 is held by the guide surface 55, that is, is not contacted. For this reason, the pattern portion 8 is not damaged when the sheet 9 is sucked and conveyed.
At this time, since the chain gripper 19 and the endless belt 37 are moving in the same direction at substantially the same speed, the seat 9 is stably in a constant posture with the rear end 93 side held by the endless belt 37. Will be transported.
For this reason, since the flickering pattern portion 8 of the sheet 9 does not contact the periphery, the sheet 9 can be prevented from being damaged.

The sheet 9 conveyed in this manner is attracted by the drive guide pulley 63 although the suction force acting on the guide surface 55 disappears when the rear end portion 93 passes through the guide 35.
When the chain gripper 19 reaches a predetermined position, the seat 9 is released. At this time, since a suction force is applied from the drive guide pulley 63 to the rear end portion 93 side of the seat 9, the seat 9 is braked to reduce the pressure abutting against a front pad (not shown) and prevent the front end portion 91 from being damaged. can do. In addition, stable stacking can be performed by adjusting the falling posture.

By adjusting the suction force acting on the drive guide pulley 63, the stacked state of the sheets 9 can be adjusted. For example, if the suction force is increased, the braking force can be increased.
Thus, since the drive guide pulley 63 functions as a vacuum wheel, it is not necessary to separately install the vacuum wheel, the structure can be simplified correspondingly, and the manufacturing cost can be reduced.

When the size of the sheet 9 to be used, the position of the dove 10 or the like is changed, the screw shaft 47 is rotated to change the position in the width direction of the guide 35 and the endless belt 37 so that it follows the position of the dove 10. Position.
Further, the position of the moving guide pulley 61 is moved, and the driving guide pulley 63 is moved in the conveying direction of the sheet 9 to adjust the position to be optimum.

Thus, even if the width direction position of the guide 35 and the endless belt 37 and the position of the drive guide pulley 63 in the sheet 9 conveyance direction are changed, the conveyance posture of the sheet 9 in the sheet guide device 29 maintains the above-described state. It will be.
Even if conditions such as paper thickness, paper size, or printing speed change, it is only necessary to adjust the position as necessary, and adjustment of the air ejection amount, which was necessary in the past, is no longer necessary. The print preparation time and the amount of lost paper can be reduced.

In the present embodiment, one guide 35 is continuously installed along the movement path of the sheet 9, but may be divided into a plurality of, for example, two as shown in FIG. 7.
That is, the guide 35 is divided into a divided guide (divided guide member) 35a and a divided guide (divided guide member) 35b.
The division guide 35a is installed in the concave curved portion on the upstream side in the sheet conveying direction, and the division guide 35b is installed in the convex curved portion on the downstream side.
The divided guides 35a and 35b are different in length from the guide 35, but have substantially the same structure.

An endless belt 37a having the same structure as the endless bell 37 is engaged with the split guide 35a. The endless belt 37 a has a movement path formed by a plurality of guide pulleys 59 and a drive guide pulley 64.
The drive guide pulley 64 is provided on the downstream side of the divided guide 35a and is configured to be rotationally driven by a drive source (not shown).
Note that the drive guide pulley 64 may suck the seat 9 as necessary, similarly to the drive guide pulley 63.

An endless belt 37b having the same structure as the endless bell 37 is engaged with the split guide 35b. Similarly to the endless belt 37, the endless belt 37 b has a movement path formed by a plurality of guide pulleys 59, a movement guide pulley 61, and a drive guide pulley 63.
The endless belt 37a and the endless belt 37b are configured such that the moving speed can be adjusted independently.

When the chain 9 holding position of the chain gripper 19 is displaced above or below the movement path of the chain gripper 19, the movement speed of the sheet 9 depends on the curvature of the movement path of the chain gripper 19 and the movement speed of the chain gripper 19. Different.
In such a case, the locations corresponding to the moving speeds of the endless belt 37a and the endless belt 37b can also be set to the speed corresponding to the moving speed of the seat 9.
As a result, the endless belt 37a and the endless belt 37b can be set to the moving speed of the sheet 9, respectively, so that the sheet 9 is stably conveyed in a fixed posture while being held by the endless belt 37a and the endless belt 37b. Will be.
For this reason, since the sheet 9 flutters and the 8 parts do not come into contact with the periphery, the sheet can be prevented from being damaged.

Moreover, in the above-mentioned thing, although the drive guide pulley 63 is provided with the function of the vacuum wheel which adsorb | sucks and brakes the sheet | seat 9, it is not limited to this.
For example, as shown in FIG. 8, a vacuum wheel 95 may be provided separately.
In this case, the drive guide pulley 63 may be simplified by removing the mechanism for sucking the sheet, or may be provided with it.

8, the vacuum wheel 95 and the drive guide pulley 63 are integrally coupled so as to move integrally in the conveyance direction of the sheet 9.
In this case, when the vacuum wheel 95 is moved according to the length of the seat 9, the drive guide pulley 63 is also moved in the same manner, so that the distance between the vacuum wheel 95 and the drive guide pulley 63 is low and Can be small. Thereby, flapping of the sheet 9 that occurs when the distance between the vacuum wheel 95 and the drive guide pulley 63 becomes large can be prevented.
Further, since the vacuum wheel 95 and the drive guide pulley 63 are integrally coupled, the moving mechanism is simplified and the adjustment work is facilitated.

The vacuum wheel 95 and the drive guide pulley 63 may not be integrated. In this case, it is desirable to move the vacuum wheel 95 and the drive guide pulley 63 separately to keep the distance between them substantially constant.
In addition, in the above-described embodiment, the configuration is not limited to the configuration in which the groove 49 (groove-shaped space portion) is provided over the entire length of the guides 35, 35a, 35b. A groove having a length communicating with a predetermined number of communication holes 57 (a groove-like space) may be used, or a length corresponding to the pitch of the through holes 43 and 77 may be used.
Further, the present invention is not limited to the present embodiment, and can be appropriately changed without departing from the gist of the present invention.

It is the front view which fractured | ruptured a part which shows the whole schematic structure of the sheet-fed printing press concerning one Embodiment of this invention. 1 is a schematic diagram showing an overall schematic configuration of a sheet guiding apparatus according to an embodiment of the present invention. It is a perspective view which fractures | ruptures and shows the structure of the guide concerning one Embodiment of this invention, and an endless belt. It is a perspective view which fractures | ruptures and shows another structure of the guide concerning one Embodiment of this invention. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is a schematic diagram which shows another embodiment of the sheet | seat guide apparatus of this invention. It is a schematic diagram which shows another embodiment of the sheet | seat guide apparatus of this invention.

Explanation of symbols

1 sheet-fed printing machine 9 sheet 10 dove 19 chain gripper 29 sheet guide device 35 guide 35a, 35b division guide 37 endless belt 37a endless belt 37b endless belt 39 suction means 41 space portion 53 projecting portion 55 guide surface 57 communication hole 63 drive guide Pulley

Claims (11)

A sheet guide device for a sheet-fed printing machine that guides a sheet conveyed by a chain gripper,
At least one guide member disposed to extend in the sheet conveyance direction along the sheet conveyance path of the chain gripper and having a space portion extending in the conveyance direction on the inside;
A belt member that has a movement path along the sheet conveyance path including a portion that engages with and moves along the space portion of the guide member, and moves around in the same direction as the sheet at a substantially equal speed;
Air suction means for engaging with the space portion,
The belt member has a protruding portion having a width narrower than a dove width protruding from the guide member toward the chain gripper, and a guide surface facing the seat of the protruding portion has a plurality of portions communicating with the space portion. A sheet guide device for a sheet-fed printing machine, wherein the communication holes are provided at intervals in the longitudinal direction.   The sheet guide device for a sheet-fed printing press according to claim 1, wherein the guide member is movable in the width direction.   2. The moving path of the belt member is provided with a guide pulley at a downstream end in the sheet conveying direction, and the guide pulley is movable in the sheet conveying direction. 2. A sheet guiding apparatus for a sheet-fed printing machine according to 2.   The sheet-fed printing according to claim 3, wherein the guide pulley is configured to move integrally with a vacuum wheel that brakes a sheet provided downstream in the sheet conveyance direction. Sheet guide device.   5. The sheet-fed printing press according to claim 3, wherein the guide pulley is configured to exert an air suction force on the communication hole of the belt member that passes through an upper position of the guide pulley. Sheet guide device. The guide member is formed of a plurality of divided guide members arranged in series in the sheet conveying direction,
The sheet guide device for a sheet-fed printing press according to claim 1 or 2, wherein each of the divided guide members includes the belt member.   A guide pulley is provided at the downstream end in the sheet conveying direction in the moving path of the belt member provided in the most downstream divided guide member, and the guide pulley is movable in the sheet conveying direction. The sheet guiding apparatus for a sheet-fed printing press according to claim 6.   The sheet-fed printing according to claim 7, wherein the guide pulley is configured to move integrally with a vacuum wheel that applies a brake to a sheet provided downstream in the sheet conveyance direction. Sheet guide device.   The sheet guide device for a sheet-fed printing press according to claim 7, wherein the guide pulley is configured to exert an air suction force on the communication hole of the belt member that passes through an upper position of the guide pulley. .   A sheet-fed printing press comprising the sheet guide device for a sheet-fed printing press according to any one of claims 1 to 9. A chain gripper for conveying a printed sheet provided in a sheet conveyance path from the printing unit to the paper discharge unit;
A guide member arranged to extend in the sheet conveyance direction along the sheet conveyance path;
A belt member provided in sliding contact with the guide member and moving in the conveyance direction in synchronization with the sheet conveyance speed as the sheet is conveyed;
A sheet-fed printing press having
The belt member has a groove-like space portion on the sliding surface of the guide member, and has a plurality of communication holes that communicate with the groove-like space portion and open to the guide surface on the side facing the sheet,
A sheet-fed printing machine comprising air suction means for sucking air in the groove-like space.

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