JP3758864B2 - Horizontal needle device for sheet-fed printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a horizontal needle device (lateral positioning device) of a sheet-fed printing press that determines registration in the horizontal direction (left-right direction) of printing.
[0002]
[Prior art]
FIG. 3 is an explanatory diagram showing the configuration and functions of a horizontal needle device in a conventional sheet-fed printing press.
A general sheet-fed printing press includes a paper feeding device, a plurality of sets of printing devices that perform multicolor printing, a paper discharge device, and a sheet stacking device provided in the paper discharge device.
In such a sheet-fed printing machine, the sheets (sheets) separated and fed one by one from the separator of the sheet feeding device are subjected to predetermined printing on the way through the printing device in the next process, and subsequently. After being stacked on the sheet discharge table of the sheet stacking apparatus in the final process, the sheet is unloaded as a predetermined number of bundles.
[0003]
Incidentally, as shown in FIG. 3, a horizontal needle device 51 for positioning the sheet in the horizontal direction is installed on the downstream side of the conventional paper feeding device. The horizontal needle device 51 is provided on a feeder board 53 for transferring the sheet 52 from the paper feeding device to the first printing device (not shown), and is located upstream of the front end of the downstream end (not shown). It is disposed on one end side in the lateral direction (left-right direction), that is, on the drive side or the operation side.
Describing the structure, the horizontal needle device 51 includes a horizontal pad 54 with which one side end (horizontal edge) of the sheet 52 on the feeder board 53 abuts, a swingable guide member 55 for guiding the sheet 52, A pair of upper and lower rollers 56 and 57 for pulling the sheet 52 toward the side pad 54 are provided. A base end portion of the guide member 55 is rotatably attached to a frame or the like (not shown) via a pivot pin 58, and an upper roller 56 is rotatably attached to an upper end of the guide member 55. The sheet 52 moves up and down as the sheet 52 enters and exits between the upper roller 56 and the feeder board 53. The lower roller 57 is a driving roller disposed to face the upper roller 56 so as to sandwich the sheet 52, and is provided to be rotatable counterclockwise.
[0004]
In the horizontal needle device 51 having such a structure, when the sheet 52 on the feeder board 53 is conveyed and stopped by contacting with a front end (not shown) at the downstream end, the sheet 52 is guided by the guide member 55. Thus, the state is sandwiched between the upper and lower rollers 56 and 57. When the upper and lower rollers 56 and 57 draw the sheet 52 toward the driving side or the operation side and the one end of the sheet 52 is brought into contact with the horizontal pad 54, the horizontal position of the sheet 52 is aligned by the horizontal needle device 51, and printing is performed. The lateral direction will be determined.
[0005]
[Problems to be solved by the invention]
However, the position of the sheet 52 in a state before the conventional horizontal needle device 51 is not drawn is not always constant, and there is a variation, and thus it is necessary to dispose the upper and lower rollers 56 and 57 away from the horizontal support 54 to some extent. Even if the sheet 52 is slightly separated from the horizontal pad 54, it is necessary to ensure that the sheet 52 can be pulled to the horizontal pad 54 within a limited time. For this purpose, it is necessary to draw the sheet 52 at a somewhat high speed.
However, when the rotational speeds of the upper and lower rollers 56 and 57 are increased, the lateral edge of the attracted sheet 52 hits the lateral pad 54 at a high speed, and the sheet 52 is deformed at that time. Therefore, there is a problem that the printing registration accuracy is deteriorated and the printing quality is deteriorated.
[0006]
The present invention has been made in view of such a situation, and an object of the present invention is to reduce deformation when a sheet for lateral positioning hits a side cover, improve printing registration accuracy, and improve print quality. An object of the present invention is to provide a horizontal needle device for a sheet-fed printing press that can be improved.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, in the present invention, the sheet transported from the sheet feeding unit and stopped in contact with the downstream front contact is drawn in the lateral direction, and its one end is laterally moved. In the horizontal needle device of the sheet-fed printing press, the position of the lateral edge of the sheet is determined when the sheet is inserted, and the registration in the lateral direction of printing is determined along the lateral direction of the sheet. A pair of upper and lower inner rollers and outer rollers whose rotation directions are substantially perpendicular to the lateral support are disposed with a space therebetween, and the inner rollers are driven at a higher rotational speed than the outer rollers, the sheet draw-fed, and constitutes the retracted sheet so as to abut against the slowly side lay at the outer roller at.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on illustrated embodiments. Here, FIG. 1 is a plan view showing a horizontal needle device of a sheet-fed printing press according to an embodiment of the present invention, and FIG. 2 is a view taken along the line AA of FIG.
[0009]
As shown in FIGS. 1 and 2, the horizontal needle device 1 according to the embodiment of the present invention is installed on the downstream side of the paper feeding device of the sheet-fed printing press. On the upstream side of the sheet feeding device, a separator 3 that separates sheets (sheets) 2 one by one and feeds them to the downstream side, and a feeder 2 coupled with a biting roller (not shown) that feeds the sheets 2 fed from the separators 3. A feeding roller 5 to be transferred onto the board 4 is provided.
In addition, a plurality of front pads 6 that define the stop position of the fed sheet 2 are disposed at the downstream end of the feeder board 4 at intervals in the sheet width direction. It functions so as to be transferred to the nail of the first intermediate cylinder disposed at the inlet of the printing apparatus in the next process.
[0010]
Further, the horizontal needle device 1 of the present embodiment has a function of determining the position of the horizontal edge of the sheet 2 during paper feeding and determining the registration in the horizontal direction of printing, and the feeder board 4 positioned upstream from the front pad 6. Above, it is arrange | positioned at the drive side or operation side (this embodiment left side of the advancing direction of the sheet | seat 2) which is the one end side of the horizontal direction (left-right direction) of the sheet | seat 2.
The horizontal needle device 1 is provided with a block-shaped lateral support 7 with which one side end (lateral edge) of the sheet 2 on the feeder board 4 abuts, and a guide piece 8 for guiding the sheet 2 to the inner tip side. The upper and lower arms 14 and 15 and a pair of upper and lower inner rollers 9 and 10 and outer rollers 11 and 12 that draw the seat 2 toward the side rest 7 are provided. These are configured to rotate at different speeds.
[0011]
The guide piece 8 extends to the side opposite to the lateral pad 7, and the leading end of the guide piece 8 is bent obliquely upward to smoothly guide the sheet 2 to the lateral pad 7 side. The upper and lower arms 14 and 15 are horizontally arranged with the outer base ends pivotably supported so that the upper inner rollers 9 and the upper outer rollers 11 are seated at the tips of the arms 14 and 15. 2 is provided to be rotatable with a predetermined interval along the horizontal direction. In addition, the upper and lower arms 14 and 15 are moved in the vertical direction with the base end as a center (arrow B in FIG. 2) due to the sheet 2 entering and exiting between the upper inner roller 9 and the upper outer roller 11 and the feeder board 4. In the direction).
On the other hand, the lower inner roller 10 and the lower outer roller 12 are driving rollers arranged to face the upper inner roller 9 and the upper outer roller 11 so as to sandwich the sheet 2, and are counterclockwise (arrows in FIG. 2). (C direction) is provided to be rotatable. Moreover, the lower inner roller 10 is set to rotate at a speed v, and the lower outer roller 12 is set to be driven to rotate at a speed v ₀ lower than the rotation speed v of the lower inner roller 10 (in other words, the lower inner roller 10 The roller 10 is driven to rotate at a faster speed than the lower outer roller 12. v> v ₀ ). Accordingly, the sheet 2 is pulled at a faster rate v by the inner roller 9 is adapted to be pressed against the slowly side lay 7 at a slower rate v ₀ by the outer rollers 11 and 12.
[0012]
Further, the horizontal needle device 1 is provided with a sensor 13 for detecting when the sheet 2 reaches the outer rollers 11 and 12, and a signal detected by the sensor 13 is sent to a control device (not shown). The inner rollers 9 and 10 are controlled. That is, the inner rollers 9 and 10 are configured to release the sheet 2 based on the detection signal from the sensor 13 so that the sheet 2 can be pulled in smoothly by the outer rollers 11 and 12.
[0013]
In the horizontal needle device 1 according to the embodiment of the present invention, when the sheet 2 is conveyed one by one on the feeder board 4 by the feeding roller 5 or the like and comes into contact with the front pad 6 and stops, 2 is pulled laterally by the inner rollers 9, 10 at a fast velocity v. Subsequently, the drawn sheet 2 is pulled by the outer rollers 11 and 12 at a slow speed v ₀ , and the lateral edges thereof are brought into contact with the lateral support 7 slowly. Accordingly, the left and right positions of the sheet 2 are aligned, and the registration in the lateral direction of printing is determined.
[0014]
As described above, in the horizontal needle device 1 according to the present embodiment, the sheet 2 is quickly drawn by the inner rollers 9 and 10, and the lateral edge (one end portion) of the sheet 2 is slowly laterally moved by the outer rollers 11 and 12. Since the lateral registration is determined by abutting against the abutment 7, the lateral edge of the seat 2 can be reliably pulled and positioned to the lateral abutment 7 within a limited time, and at the time of hitting the lateral abutment 7. The deformation of the sheet 2 can be reduced, and the registration accuracy is improved. Moreover, since the outer rollers 11 and 12 are disposed outside the inner rollers 9 and 10 at a predetermined interval, the outer rollers 11 and 12 can be disposed closer to the lateral support 7 than in the prior art. It becomes possible, and the deformation amount of the sheet 2 when pressed against the lateral pad 7 can be suppressed.
[0015]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the scope of the present invention. is there. For example, in the above-described embodiment, the horizontal needle device 1 is disposed on the left side in the traveling direction of the seat 2, but may be disposed on the right side in the traveling direction of the seat 2 depending on the applicable model.
[0016]
【The invention's effect】
As described above, the horizontal needle device of the sheet-fed printing press according to the present invention draws the sheet that has been transported from the sheet feeding unit and stopped in contact with the downstream front contact, in the lateral direction, and the one end portion is By abutting against the lateral pad, the position of the lateral edge of the sheet is determined when inserting the paper, and the registration in the lateral direction of the printing is determined, and the rotational direction is along the lateral direction of the sheet. A pair of upper and lower inner rollers and outer rollers that are substantially perpendicular to the lateral support are disposed with a space therebetween, and the inner rollers are driven at a higher rotational speed than the outer rollers, and the inner rollers pull the leaf paper, so constituting the retracted sheet so as to abut against the slowly the side lay in the outer roller, when positioning the transverse direction of the sheet to be conveyed, the sheet Reduces the amount of deformation when the horizontal edge hits the side cover It can, thereby the better the registration accuracy of printing, it is possible to improve the print quality.
[Brief description of the drawings]
FIG. 1 is a plan view showing a horizontal needle device of a sheet-fed printing press according to an embodiment of the present invention.
2 is a view taken along line AA in FIG.
FIG. 3 is a partial front view showing a horizontal needle device of a conventional sheet-fed printing press.
[Explanation of symbols]
1 Horizontal needle device 2 Sheet (sheet)
3 Separator 4 Feeder board 5 Feeding roller 6 Front contact 7 Lateral contact 8 Guide members 9 and 10 Inner roller 11 and 12 Outer roller 13 Sensor 14 and 15 Arm

Claims (2)

Is conveyed from the paper feed unit, the sheet has stopped downstream of the pre-focuses abuts, drawn in the transverse direction, by butting the one end portion side lay, of the sheet when the paper feed side edge determine the position, the side lay device determines the lateral register a sheet-fed printing press printing, along the transverse direction of the sheet, a pair of upper and lower inner roller direction of rotation substantially perpendicular to said side lay And the outer rollers are arranged at intervals, the inner rollers are driven at a rotational speed faster than the outer rollers, the sheet is pulled by the inner rollers, and the drawn sheets are side lay device sheet-fed printing press, characterized by being configured so as to abut against the slowly the side lay in the outer roller. The sensor according to claim 1, wherein a sensor is provided for detecting when the sheet reaches the outer roller, and the inner roller releases the sheet based on a detection signal from the sensor. The horizontal needle device of the sheet-fed printing press as described.

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