JPH0344759Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper feeding device for a sheet-fed printing press, and in particular, a plurality of paper pressing rollers arranged in a direction perpendicular to the traveling direction of sheets of paper are integrally moved in the traveling direction. The present invention relates to a paper holding mechanism that facilitates stage changes when changing the size of sheets by moving the paper.

In the case of a sheet-fed printing press, sheets of various sizes are stacked and stored, and a vacuum sucker picks up each sheet one by one and sends them to a paper feeder. After the paper is registered and the timing is adjusted with the printing unit, the paper is fed to the printing unit. The paper feeding device includes a plurality of tape conveyors provided in a plurality of rows in the direction in which paper travels, a drive means for the tape conveyor, and a paper press roller that presses the paper against the tape conveyor from the top surface of the paper to generate a conveying force due to friction. It is the main component.
That is, the paper is sandwiched between the tape conveyor and the paper press roller, the paper is registered by the lateral regulating device and the front regulating device at the front end of the paper feeding device, and the paper is gripped by the gripper. It is sent to the printing unit.

In such a paper feeding device, a plurality of paper holding rollers are arranged perpendicularly to the paper traveling direction in correspondence with the tape conveyor, but the arrangement position with respect to the paper traveling direction is determined by the registration means and the gripper. determined in relation to In other words, paper of various sizes is correctly registered front to back, left and right, and when the paper is sent to the printing unit by the gripper, the presser roller is adjusted so that the trailing edge of the paper is released from the pressing force of the paper presser roller. The position with respect to the direction of travel must be determined.

In other words, the position of the paper press roller must be set so that it presses the paper appropriately up to a certain point and stops pressing the paper at a specific timing.

Therefore, when the size of the paper to be fed or printed is changed, the position of the paper presser roller at least in the paper traveling direction must also be changed.

This is because the pressure release position described above differs depending on the size of the paper.

Regarding such paper press rollers, in the past, a plurality of paper press rollers were provided perpendicularly to the direction in which the paper travels, corresponding to the tape conveyor, and each of the paper press rollers was individually moved. In other words, a roller fixing bar is provided for each paper holding roller along the paper traveling direction, and the roller is cantilevered by the fixing bar via a long leaf spring or the like, and the bar is The leaf spring was screwed or otherwise fixed in a predetermined position.

However, changing the position of multiple (for example, 4 or more) paper press rollers individually each time the size of paper changes requires a lot of effort to change the setup, and it is difficult to automate this changeover. This is inconvenient.

The present invention was devised in view of the above-mentioned problems and provides an advanced paper holding mechanism, and its purpose is to:
It is an object of the present invention to facilitate the work of changing the setting position of a paper presser roller when changing the size of paper, and to make the changing work suitable for automation.

To this end, the paper press mechanism according to the present invention has a plurality of paper press rollers integrally cantilevered on a support bar, and the support bar is guided along guide rails provided on both sides of the paper advancing surface. The paper is moved in the direction in which the paper travels.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the paper presser mechanism according to the present invention, FIG. 2 is a side view of the main part of FIG. 1,
3 is a side view further enlarging the main part of FIG. 2, and FIG. 4 is a plan view of FIG. 3.

In the drawings, reference numeral 1 typically indicates a paper feed table, and reference numeral 2 representatively indicates a regulating device and gripper for the paper 3, respectively. Paper feed table 1 has multiple rows of
For example, 4 to 6 tape conveyors 4 are provided, and these tape conveyors 4 have pulleys 5,
6 and is moved in the traveling direction of the paper 3 (indicated by an arrow), thereby conveying the paper 3 in the direction of the regulating device 2, etc.

Paper pressing rollers 7 provided on the upper surface of the tape conveyors 4 in correspondence with these tape conveyors 4
is elastically supported by a leaf spring 8, and the other end of the leaf spring 8 is cantilevered on a support bar 10 via an arm 9. That is, a support bar 10 is installed horizontally at right angles to the traveling direction of the paper 3, and this support bar 10
A plurality of paper pressing rollers 7 are integrally cantilevered on the side. The reason why the leaf spring 8 is used is to press the paper 3 against the tape conveyor 4 with an appropriate pressing force.Also, the leaf spring 8 may be attached directly to the support bar 10, but the arm 9 It is preferable that the mounting angle of the paper press roller 7 with respect to the support bar 10 can be changed by interposing the paper press roller 7. Furthermore,
In the case of FIG. 4, etc., the paper pressing roller 7 is positioned at the front in the traveling direction of the paper 3, but of course it may be positioned at the rear in the opposite direction, and if necessary, both the front and rear sides may be positioned. may be provided.

A pair of guide rails 11 are provided on both sides of the paper feed table 1, in other words, on the outside of the surface on which the paper 3 advances. These guide rails 11 are provided on the upper surface of the paper feeding table 1 in parallel with the paper feeding table 1, are also parallel to each other, and are of course along the traveling direction of the paper 3. There is a rack 1 on the underside of the guide rail 11.
2 is cut off. This rack 12 meshes with a feed pinion 13, as will be described later.

In addition, if the proposed mechanism is to be further technically advanced, the rack 12 may be replaced with a rail for a linear motor.

A guide member 14 is slidably engaged with each of the pair of guide rails 11.

That is, both ends of the support rod 10 are connected to the inside of a pair of guide members 14, thereby forming a plurality of guide members (only two representative ones are shown in FIG. 4).
The paper press roller 7, the support bar 10 that cantilever these rollers 7 together, and the guide member 14 hold the paper 3
The position can be moved integrally along the guide rail 11 in the same direction as the traveling direction of the vehicle.

A feed pinion 13 is rotatably provided on one or both of the guide members 14, and this feed pinion 13 meshes with the rack 12 of the support bar 10. Then, by rotating this feed pinion 13 with a handle 15 coaxial with the feed pinion 13 or by rotating it with a motor (not shown), the guide member 14, and thus the paper presser roller 7, is moved forward in the direction in which the paper advances. It can be pushed back.

In addition, when the feed pinions 13 are provided on both guide members 14 as shown in FIG. 4, if the feed pinions 13 are connected to each other by the shaft 16, the motion performance is good.

A stopper 17 is attached to the guide member 14 in order to fix the guide member 14 at a fixed position on the support bar 10 depending on the size of the paper 3. This stopper 17 is a kind of tightening screw, and when it is tightened after the guide member 14 has been moved, it comes into contact with the support bar 10, and while the paper 3 of the same size is fed, the guide member 17 (Therefore, the paper presser roller 7) is prevented from moving.

Note that the setting position of the paper presser roller 7 is determined by the size of the paper 3 shown by symbol H in FIG. 2, so as shown in FIG. It is preferable to attach a position scale 18 and align the guide member 14 with this position scale 18.

In this embodiment, an example is shown in which the feed pinion 13 is rotated by manual power, but the guide member 14 may be configured by a linear motor and automatically moved along the guide rail 11. Of course, it is also possible to do so. Then,
Although the price of the entire mechanism increases, the paper pressing roller 7 can be moved automatically and precisely.

Next, the operation of the above embodiment will be explained.
When the size of the paper 3 to be printed is changed and therefore the distance between the regulating device etc. 2 and the paper pressing roller 7 must also be changed, the stopper 17 is first loosened and the guide member 14 is freed. . The guide member 14 is moved forward or backward along the guide rail 11 by relying on the position scale 18 attached to the support bar 10. Then, since all the paper pressing rollers 7 are cantilevered by one supporting bar 10 integrated with the guide member 14, they are moved on each tape conveyor 4 to a new position.
Then, after moving to the new position, stopper 1
7 is tightened to the support bar 10 to prevent the position of the paper pressing roller 7 from changing unnecessarily. At this new setting position, the paper pressing roller 7 presses the paper 3 against the tape conveyor 4,
The sheet 3 functions to be conveniently fed, registered, and gripped by the gripper.

As described above, the paper presser mechanism according to the present invention includes a support bar that integrally cantilevers a plurality of paper presser rollers, and a pair of guide rails that extend along the paper advancing surface and are provided with a rack. a pair of guide members that are slidably engaged with these guide rails and to which end portions of the support bars are respectively connected; and a feed pinion that is provided on the guide member and meshes with the rack; By providing a stopper that fixes the guide member to the support bar, all paper presser rollers can be moved in unison, making it easy to change setups when using paper of a wide variety of sizes. , and can be done quickly.Moreover, this setup change work can be automated, which can greatly contribute to improving the efficiency of printing work.

[Brief explanation of drawings]

Figure 1 is a side view showing an embodiment of the paper presser mechanism according to the present invention, Figure 2 is an enlarged side view of the main part of Figure 1, and Figure 3 is a further enlarged view of the main part of Figure 2. The side view shown in FIG. 4 is a plan view of FIG. 3. 1...Paper feed table, 2...Regulation device, etc., 3...
... Paper, 4 ... Tape conveyor, 7 ... Paper press roller, 8 ... Leaf spring, 10 ... Support bar, 11 ...
...Guide rail, 12...Rack, 13...Feed pinion, 14...Guide member, 17...Stopper, 18...Position scale.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of tape conveyors 4 arranged in a plurality of rows in the direction in which the paper 3 travels, and a plurality of paper pressing rollers 7 arranged in a direction perpendicular to the direction of travel corresponding to these tape conveyors 4. In a sheet feeding device that feeds paper 3 to a unit by sandwiching the paper 3 between them, there is a support bar 10 that integrally cantilevers these paper pressing rollers 7, and a support bar 10 that is attached to the outside of the advancing surface of the paper 3. Guide rails 11 are provided parallel to each other along the traveling surface and have racks 12 formed thereon. a pair of connected guide members 14; and a rack 1 provided on the guide members 14;
a feed pinion 13 that meshes with the guide member 2 and is rotated by the handle 15 to change the position of the guide member 14 with respect to the traveling direction of the paper 3; and a stopper 17 that fixes the guide member 14 at a fixed position on the support bar 10. A paper holding mechanism characterized by having the following. 2. The paper holding mechanism according to claim 1, wherein the guide rail 11 is provided with a position scale 18.