JPH11105247A - Sheet guiding device of printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent even a sheet having a large rigidity from being rubbed strongly against a sheet guide. SOLUTION: The sheet guide 3 of a printing machine is provided on the outer peripheral part of an intermediate cylinder 1 and is divided into a movable guide 3a and a fixed guide 3b. One end of the movable guide 3a is journaled to a shaft 8 supported on a fixed frame. The rocking end side of the movable guide 3a is supported by a space-adjusting mechanism. Concretely, a roller 11a is pivotally journaled to a bracket 11 provided at the head part of an adjusting shaft 10. The adjusting shaft 10 abuts the roller 11a provided at the upper part of the adjusting shaft against the movable guide 3a and is vertically movably and insertingly past in a sliding hole provided on a beam fixed to a fixed frame. A thread is formed at the lower part of the adjusting part of the adjusting shaft 10 so as to be screwed with an adjusting nut 12. Between the branket 11 and the beam 9 of the adjusting shaft 10, a compression spring 13 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet guide device for a printing press, which is installed in a sheet-fed printing press and rotatably transports a sheet via a claw device provided on a cylinder for conveying the sheet.

[0002]

2. Description of the Related Art FIG. 3 shows a state in which a sheet guide device is attached to a conventional general sheet-fed printing press, and FIG.
It is an enlarged view of the sheet guide device. In a general sheet-fed printing press, a plurality of printing device units 20 are arranged side by side along the traveling direction of a sheet (sheet) 6, and each printing device unit 20 receives the sheet 6.
Is transported, and a pattern having a different ink color is sequentially transferred to the sheet 6, so that multicolor printing can be performed. The claw device 1 of the impression cylinder 14 installed in the first color printing device unit 20 one by one from the sheet feeding device in the previous process is used for the sheet 6.
After being transferred to 5, the roller is rotationally transferred along the outer peripheral surface of the impression cylinder 14, and printing is performed during the transfer. Next, the sheet 6 is transferred from the impression cylinder 14 to the intermediate cylinder 1 arranged side by side downstream, and further transferred to the impression cylinder 14 of the next-stage printing apparatus unit arranged next to the second cylinder, where the second color printing is performed. . Hereinafter, the same operation is sequentially repeated to complete the target multi-color printing.

In transferring the sheet 6 to the impression cylinder 14, the intermediate cylinder 1, and the impression cylinder 14 sequentially, the sheet 6
Various sheet guide devices are provided in a sheet-fed printing press as means for causing the sheet to run stably. The example illustrated in FIG. 3 is a conventional general sheet guide device disposed below the intermediate drum 1, and this device is a measure for suppressing the fluttering of the sheet 6 during conveyance which is likely to occur in the intermediate drum 1. Is provided with a fixed type sheet guide 16. The sheet guides 16 are arranged with a predetermined gap substantially parallel to the rotation locus of the claw device 2 associated with the rotation of the intermediate cylinder 1. To the frame 7 of the seat guide device.

[0004]

In this type of sheet guide apparatus, the position of the sheet guide 16 is fixed, and the sheet 6 to be conveyed is sometimes thick or has high rigidity. In such a case, since the force for straightening the sheet 6 is strong, the sheet 6 does not follow the outer peripheral surface of the intermediate cylinder 1, and the rear end (sheet edge) of the sheet 6 is
A trouble such as being rubbed against the surface occurs. As described above, the conventional sheet guide device cannot ideally cope with sheets 6 having various thicknesses. In the case of a thick sheet or a sheet 6 having high rigidity, as described above, the sheet edge 6a However, there has been a problem that the surface is rubbed and damaged, and the product quality is remarkably deteriorated. The present invention has been made to address these problems, and has as its object to provide a sheet guide device for a printing press that prevents a sheet having a large thickness or a large rigidity from being strongly rubbed against a sheet guide. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention conveys a sheet in a circumferential direction of a sheet conveying cylinder, and extends along the outer peripheral surface of the sheet conveying cylinder. In a sheet guide device of a printing press provided with a sheet guide provided with a gap between the sheet guide surface and the sheet guide, a gap adjusting mechanism that adjusts the gap according to the pressing force exerted on the sheet guide surface by the sheet is provided. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet guide device for a printing press according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sheet guide device for a printing press according to the present invention. The sheet guide device is provided with a predetermined gap substantially parallel to the rotation locus of the claw device 2 portion accompanying the rotation of the intermediate cylinder 1,
The seat guide 3 is provided, and a plurality of the seat guides 3 are arranged in the axial direction of the intermediate cylinder 1.

The sheet guide 3 is divided into a movable guide 3a and a fixed guide 3b in the traveling direction of the sheet 6. The movable guide 3a has an arc-shaped cross section, and has a guide surface 19 for guiding the sheet 6 facing the intermediate cylinder. One end of the movable guide 3a extends in the axial direction of the intermediate cylinder 1, and is connected to both ends of the group of sheet guides 3, that is, a shaft 8 supported by a fixed frame (not shown) provided at both width ends of the sheet guide device. The movable guide 3a is mounted on a shaft so that the movable guide 3a can swing vertically. The swinging end side of the movable guide 3a is supported by the gap adjusting mechanism 21. The gap adjusting mechanism includes an adjusting shaft 10 having a shaft shape, and a roller 11a is rotatably mounted on a bracket 11 provided on the head thereof. The adjustment shaft 10 is provided in a sliding hole provided in the beam 9 fixed to the frame at both width ends of the sheet guide device,
The roller 11 is brought into contact with the outer peripheral surface of the movable guide 3a and is inserted so as to be able to move up and down. The lower part of the adjusting shaft 10 is provided with a male screw, and an adjusting nut 12 is screwed thereto.

The bracket 11 of the adjusting shaft 10 and the beam 9
The adjustment shaft 10 is wound between the compression spring 13 and the upper surface of the compression spring 13.
Is incorporated so as to push up the movable guide 3a. Therefore, the adjustment shaft 10 falls downward when a downward load is applied to the movable guide 3a, and returns upward when the load is removed. The adjustment nut 12 abuts on the lower end surface of the beam 9, thereby restricting the rising position of the adjustment shaft 10. As shown in FIG. 2, one end of the fixed guide 3 b group located on one side of the seat guide 3, that is, on the downstream side of the running seat 6, is attached to the shaft 8, and the other end is connected via the connecting member bracket 5. It is fixed to the device frame 7 shown in FIG. In the group of fixed guides 3 b, each guide 3 b is fixed by the connecting member 4, and the fixed guides 3 b are displaced from the movable guide 3 a in the axial direction of the shaft 8.

The operation of the sheet guide device for a printing press according to the embodiment of the present invention is as follows. With the above configuration, the gap between the intermediate cylinder 1 and the movable guide 3a can be adjusted by moving the adjustment nut 12 of the gap adjustment mechanism 21. For example, normally, as shown by a dashed line in FIG. 1, the movable guide 3 a is disposed along the outer peripheral surface of the intermediate cylinder 1. At this time, the adjusting nut 12 is in the initial state (non-operating state).
In contact with the lower end surface of. In this state, the guide surface 19 of the intermediate cylinder 1
It is preferable to use a compression spring 13 having a spring constant so that the outer peripheral surface and the gap have the same interval. When the sheet 6 is gripped and transferred by the claw device 2 of the intermediate cylinder 1, when there is no sheet 6, or when the sheet 6 is not rigid and has a weak force to hit, the guide surface 19 of the movable guide 3 a includes the sheet The pressing force from 6 is not applied or hardly applied, and the movable guide 3a hardly swings. Therefore, the bracket 11 is pushed upward by the compression spring 13 and the adjustment nut 12 is in contact with the lower end surface of the beam 9 (indicated by a dashed line in FIG. 1).

When the sheet 6 has rigidity, the paper edge 6a of the sheet 6 comes into strong contact with the guide surface 19 and receives a pressing force from the paper edge 6a, but the solid line of the movable guide 3a in FIG.
As shown in (1), the movable guide 3a pushes the adjustment shaft 10 downward against the urging force of the compression spring 13. At this time, the roller 11a slightly rolls on the outer peripheral surface of the movable guide 3a so that the sliding resistance of the adjustment shaft 10 does not increase. By the swinging (escape) of the movable guide 3a, the contact resistance of the sheet 6 can be significantly reduced. Therefore, damage such as scratching of the sheet 6 is eliminated. When the sheet 6 has passed the movable guide 3a, it returns to its original position.

Further, when a sheet having a high rigidity or a large thickness is conveyed, the sheet is rotated in a direction to tighten the adjustment nut 12 to increase the gap between the outer peripheral surface of the intermediate cylinder 1 and the movable guide 3a. Good conveyance of sheets is possible. In this case, the compression spring 13 for the movable guide 3a
Therefore, the adjusting nut 12 may be removed and disassembled, and the compression spring 13 may be replaced with an appropriate one. In the sheet guide device of this type, each of the movable guides 3a arranged side by side in the lateral width direction of the sheet 6 can be individually raised and lowered, and the swing end side of the movable guide 3a corresponds to the sheet conveyance state. It can be set appropriately. As described above, the present invention relates to the urging force of the compression spring 13 and the adjustment nut 1.
After the gap between the leading end of the sheet guide 3c on the introduction side of the sheet 6 and the intermediate cylinder 1 is appropriately set by the movement of the sheet 2, the sheet 6 can be conveyed.

Although the embodiment of the present invention has been described above, the present invention is, of course, not limited to this, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, the beam 9 that supports the adjustment shaft 10 so as to be able to move up and down is fixed to the frame, but a configuration in which the beam 9 can be moved in the axial direction of the adjustment shaft 10 may be used. Thus, even if the gap between the outer peripheral surface of the intermediate cylinder 1 and the movable guide 3a is changed, it is not necessary to change the set length of the compression spring 13.
For this reason, it is possible to set the initial set tension of the compression spring 13 to be constant.

As the means for swinging the movable guide 3a, the compression springs 13 are used. However, these are not used, but a leaf spring is used, or a coil spring is wound around the shaft 8, so that the end of the spring is moved by the movable guide. The movable guide 3a may be swung by contacting the lower surface of the movable guide 3a. Although the movable guide 3a and the fixed guide 3b are divided, a single guide plate may be used without dividing the movable guide 3a and the fixed guide 3b, for example, a hinge may be provided at the upper end of the blade fixing device 5. Further, the movable guide 3a is allowed to swing. However, when the rigidity of the seat 6 is constant, the gap between the movable guide 3a and the movable guide 3a can be simply adjusted without swinging the movable guide 3a. The sheet 6 may be conveyed.

[0014]

As described above, according to the present invention,
A gap adjusting mechanism is provided for adjusting the gap between the sheet conveying cylinder and the guide surface according to the pressing force exerted on the sheet guide surface by the sheet. Therefore, when a rigid sheet is conveyed, the sheet presses the sheet guide surface, so that the gap between the outer periphery of the conveyance cylinder and the sheet guide surface is appropriately changed, and the sheet edge of the sheet is strongly rubbed against the sheet guide surface. Can be eliminated, and damage to the sheet can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a sheet guide device of a printing press according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a gap adjusting mechanism provided in a sheet guide device of the printing press shown in FIG.

FIG. 3 is a schematic side view for explaining functions of a sheet guide device of a conventional general printing press.

FIG. 4 is an enlarged side view of a sheet guide device of the printing press in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intermediate trunk 2 Claw device 3 Seat guide 3a Movable guide 3b Fixed guide 4 Connecting member 5 Bracket 6 Seat 7 Frame 8 Shaft 9 Beam 10 Adjusting shaft 11 Bracket 11a Roller 12 Adjusting nut 13 Compression spring 19 Guide surface 21 Gap adjusting mechanism

Claims (2)

[Claims] 1. A sheet guide that is conveyed along a circumferential direction of a sheet conveying cylinder, and is provided along an outer peripheral surface of the sheet conveying cylinder and provided with a gap between the sheet conveying cylinder and the outer peripheral surface. A sheet guide device for a printing press, comprising a gap adjusting mechanism for adjusting the gap according to a pressing force exerted by a sheet on a sheet guide surface. 2. A sheet guide apparatus for a printing press according to claim 1, wherein said sheet guide is provided swingably, and said sheet guide is supported by an elastic body.