JPH037582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed roller device that presses the web on paper feed rollers such as drag rollers, nipping rollers, and cooling rollers installed in various places such as cooling devices, folding machines, and sheeters of rotary printing presses. It is related to.

A web rotary printing machine that supplies the web wound around the take-up spindle of a paper feeding device to a printing unit and prints on it is equipped with a cooling device that cools the paper after printing, and
It is equipped with a folding machine that cuts and folds the cooled web into predetermined dimensions, and depending on the specifications of the printed material, the printed web can be cut to the predetermined dimensions and then output as is without folding. A sheet discharging device called a sheet feeder or sheeter is attached. Since the web is ejected after passing through these attached equipment, these equipment are equipped with paper feed rollers called drag rollers, nipping rollers, cooling rollers, etc. It is configured to sandwich the web between the rollers of an attached paper pressing roller device and send it out at a predetermined speed.

Fig. 1 is a side view showing the sheeter paper presser roller device of the conventional paper presser roller device, and Fig. 2 is a developed plan view of the sheeter paper presser roller device. A drag roller 2 rotatably driven from the driving side is pivotally supported on the frame 1, and a pair of left and right studs 3 are implanted on the inner surface of each frame 1 diagonally above the drag roller 2. On the left and right studs 3, roller shaft arms 4 formed in an inverted shape are swingably supported, respectively, and on the roller shaft 5 rotatably supported at the free ends of the arms 4, a roller shaft arm 4 is supported. A plurality of paper pressing rollers 6 whose outer peripheries are covered with rubber are fixed in parallel with each other with their circumferential surfaces facing the circumferential surface of the drag roller 2. A spring shaft 7 pivotally attached to the other free end of the roller shaft arm 4 has its other end slidably supported by a stud 8 implanted in the frame. , a compression coil spring 9 that applies rotational force to the roller shaft arm 4 in the direction of pressing the paper pressing roller 6 against the drag roller 2;
is installed. Reference numeral 10 denotes a stopper for restricting rotation of the roller shaft arm 4, which is composed of a stud 11 implanted in the frame 1 and a bolt 12 screwed into the stud 11 so as to be adjustable. Furthermore, detachable cams 14 are pivotally mounted on a camshaft 13 that is mounted above the free end of the roller shaft arm 4 in correspondence with the left and right roller shaft arms 4, and a protrusion from the frame 1 A handle 15 is fixed to the handle.

In a sheeter equipped with such a presser roller device, the web 16, which has been dried and cooled after printing, is attached to the drag roller 2 at the entrance of the sheeter at an angle of about 90 degrees, and then guided to a cutter (not shown) on the downstream side.
In this case, since the paper presser roller 6 is pressed against the web 16 by the elastic force of the compression coil spring 9,
The web 16 is pulled out at a predetermined speed by rotationally driving the drag roller 2 from the driving side.
It passes through the cutter and is fed between the upper and lower conveyor belts. When performing so-called paper threading, in which the web 16 is passed from the entrance to the exit of the machine prior to printing work, or when removing paper jams during work, the handle 15 is gripped and the cam shaft 13 is rotated. After separating the paper pressing roller 6 from the drag roller 2 by bringing the large diameter portion of the detachable cam 14 into contact with the roller arm 4, these operations are performed.

However, a large spring force is set in the compression coil spring 9 so that the web 16 can be pulled out from the drag roller 2 with a constant tension without slipping. When compressing, a large force is required to operate the handle 15, which not only tends to wear out the cam surface of the detachable cam 14 and the roller arm 4, but also forces the compression coil spring 9 to be forcibly compressed. There were problems that caused fatigue and shortened the lifespan. This is true not only for the paper feed roller of the sheeter but also for the paper feed rollers at each of the above locations.

The present invention has been made in view of the above points, and includes a roller arm whose central portion is supported by the frame side and which supports the paper presser roller at one end, and which can be bent freely between the other end portion and the rotating operation shaft on the frame side. The spring member and the engaging member are connected by a connecting member, and the spring member and the engaging member are skillfully disposed on the connecting member, and the rotating operation shaft is rotated to slightly bend the connecting member to one side, thereby causing the spring member to spring. The paper is constructed so that the paper presser roller is pressed against the web on the paper feed roller by force, and the connecting member is largely bent toward the other side so that the paper presser roller is separated from the paper feed roller by the engagement of the engaging member. The present invention provides a paper pressing device for a paper feeding roller that reduces the force required to attach and detach the paper pressing roller from the feeding roller and prevents wear and tear on the operating member. Embodiments of the present invention will be described in detail below with reference to the drawings.

This embodiment shows an example in which the paper presser device according to the present invention is implemented on a drag roller in a sheeter of a rotary printing press. Fig. 3 is a schematic side view of the sheeter in which this is implemented, and Fig. 4 is a side view of the paper presser roller device. 5 is a partially cutaway front view of FIG. 4 as viewed from A, and FIG. 6 is a partially cutaway developed plan view of FIG. 4 as seen from B. In the figure,
At the entrance of the sheeter 21, there is a guide roller 2 that guides the sheet 22 that has been dried and cooled after printing.
3, 24, 25, and a drag roller 26 as a paper feed roller which is rotationally driven from the driving side and rotates in the direction shown by arrow C in the figure. attached at a circumferential angle of . What is generally designated by the reference numeral 27 is a paper pressing roller device which will be explained in detail later, and is configured to sandwich and convey the web 22 between its paper pressing rollers 28 and drag rollers 26. On the downstream side of the drag roller 26 in the web conveyance direction, there is a rotating cylindrical cutting cylinder 29 having a cutter at one location on its circumferential surface, and a blade holder 3 below the cutting cylinder 29.
A cutting device 31 equipped with a cutting device 0 and a cutting device 31 is disposed further downstream thereof, and a plurality of high-speed belts 32 having a plurality of strips stretched in a triangular shape between a plurality of sets of belt rollers parallel to each other in the axial direction, A plurality of high-speed belts 33 stretched in a triangular shape are arranged above and below.
The reference numeral 34 is a low-speed belt stretched continuously on the high-speed belt 32, and the high-speed belt 3
2 and 33, and is configured to overlap sheets of paper 35 cut by a cutting device 31 and then conveyed by high-speed belts 32 and 33 while shifting them little by little. At the conveyance end portion of this low-speed belt 34,
A brake roller 36 that brakes the conveyance of the paper 35, and paper discharge rollers 37, 3 that hold the paper 35 vertically and discharge it.
8 is disposed, and a paper stacking table 39 is provided diagonally below the paper stacking table 39, which stacks the ejected paper 35 and descends automatically.

Next, the paper pressing roller device 27 will be explained. A pair of left and right studs 40 are provided diagonally above the drag roller 26 and protrude inward from the left and right frames 41, and a horizontal roller arm 42 is rotatably prevented from coming off by a snap ring. is fitted and supported. A roller shaft 43 is rotatably supported at one free end of each of the left and right roller arms 42 facing above the drag roller 26. On this roller shaft 43, a plurality of of the paper presser rollers 28
are mounted parallel to each other with their circumferential surfaces facing the web 22 on the drag roller 26. Further, a prismatic stud 4 is attached to the other free end side of the roller arm 42.
4 is prevented from coming off by a snap spring 45 and is rotatably mounted, and further below the stud 44, a rotation operation shaft 46 is rotatably mounted between the left and right frames 41. The reference numeral 47 as a whole is a connecting member that connects the stud 44 on the roller arm 42 side and the rotating operation shaft 46 on the frame 41 side, and is a lever that is bendably connected to each other by a pin 48. 49 and a screw shaft 50. Of these, the lever 49 is the rotating operation shaft 4
A screw shaft 50, which is fixed to the stud 6 and pivoted to its free end by a pin 48, is inserted into the shaft hole of the stud 44 and is slidably supported. screw shaft 50
A collar 51 as an engaging member is fixed to the protruding end of the stud 44, and this collar 51 is slightly away from the stud 44 when the connecting member 47 is in the non-bending state as shown in FIG. Their positions are set so that they are spaced apart from each other. Furthermore, double nuts 52 and 53 are screwed into the threaded portion of the screw shaft 50 so that they can be adjusted forward and backward. A plurality of disc springs 54 as spring members are interposed via washers 55 and 56 to apply rotational force to the roller arm 42. Reference numerals 57 and 58 indicate studs 5 installed in the frame 41.
9 and 60 and bolts 61 and 62 that are screwed into the bolts so as to be adjustable forward and backward. It is configured to restrict the rotation at a position where the rotation is significantly rotated to. Then, by setting the position of the collar 51 and setting the spring force of the disc spring 54 using the double nuts 52 and 53, when the lever 49 is rotated until it comes into contact with the stopper 57, the spring force acts, and the lever 49
When the collar 51 is rotated until it comes into contact with the stopper 58, the spring force is not applied and the collar 51 comes into contact with the stud 44 and presses it down, so that the paper presser roller 28
is configured to be separated from the drag roller 26. Furthermore, a handle boss 63 fixed to the protruding end of the rotating operation shaft 46 from the frame 41
includes a handle 64 for rotating the rotation operation shaft 46.
is pivotally attached to the frame 41 so as to be able to swing freely in the distance direction, and 65 is a stopper that locks the handle 64 when the rotation operating shaft 46 is rotated until the lever 49 assumes the position shown in chain lines in FIG. It is. 6
Reference numeral 5 designates a stopper that brings the roller arm 42 into contact to adjust the contact pressure of the paper pressing roller 28 against the drag roller 26, and 67 designates a leaf spring that suppresses the waving of the web 22 fed into the cutter 29.

The operation of the paper pressing roller device configured as above will be explained. When performing paper threading work prior to printing work, when the lever 49 is rotated by rotating the handle 64 from the contact position to the stopper 57 to the contact position to the stopper 58, the solid line shown in FIG. At the non-bending position of the connecting member 47, that is, at the dead center, the elastic force of the disc spring 54 becomes maximum, and then the elastic force weakens and when the collar 51 comes into contact with the stud 44, the roller arm 42 is pushed down. As a result, the roller arm 42 begins to rotate as a unit, and the paper pressing roller 28 separates from the drag roller 26. At this position, move the handle 64 to the stopper 65.
Lock it in place and perform the paper threading operation. When the handle 64 is rotated in the opposite direction after the operation, the disc spring 54 is about to be compressed. Therefore, the elastic force of the disc spring 54 does not act on the handle 64 until the paper presser roller 28 comes into contact with the web 22. Then, after the disc spring 54 begins to be compressed and passes the dead center, the lever 49 rotates slightly and comes into contact with the stopper 57, and the paper pressing roller 28 presses the web 22 due to the elastic force of the disc spring 54. In this case, the connecting member 47 is bent beyond the dead center, and the disc spring 54
Since the elastic force acts on the handle 64, the handle 64 will not rotate due to vibration or the like. Further, the elastic force of the disc spring 54 acts on the handle 64 only for a short time when the handle 64 passes over the dead center, and furthermore, since the amount of movement of the screw shaft 50 is smaller than the amount of movement of the pin 48, The lever principle allows the handle 64 to be rotated with a small force.

When the printing operation is started after the paper press roller 28 is pressed against the web 22 in this manner, the web 22, which has been dried and cooled after printing, is pulled out by the rotation of the drag roller 26 and the paper press roller 28 pressed by the drag roller 26. The paper is conveyed by upper and lower high-speed belts 32 and 33, and cut into a predetermined length by the blade of the rotating cutting drum 29 and the blade holder 30. The cut sheets 35 are carried over by a low-speed belt 34 so that they are slightly overlapped, and after being braked by a brake roller 36, they are discharged onto a discharge stacking table 39 by paper discharge rollers 37 and 38 and stacked thereon.

Although this embodiment shows an example in which the present invention is applied to a sheeter drag roller, it can also be applied to various paper feed rollers such as the drag roller of a folding machine, the nipping roller, and the cooling roller of a cooling device. can do. Also, the spring member does not necessarily have to be a disc spring, but disc springs are more effective than coil springs because they can take up less space with the same spring constant and the amount of compression in the axial direction is smaller. be.

As is clear from the above description, according to the present invention, in the paper press roller device of the paper feed roller,
A stud, lever, screw shaft,
They are connected by a connecting member consisting of a spring member and an engaging member, and the rotating operation shaft is rotated to slightly bend the connecting member to one side, so that the paper pressing roller is moved by the spring force of the spring member to the web on the paper feed roller. In addition, by bending the connecting member greatly toward the other side, the paper presser roller is separated from the paper feed roller by the engagement of the engaging member, so that the paper presser roller can be pushed away from the paper feed roller during paper threading work, etc. When attaching to and detaching from the feed roller, the weight of the paper presser roller can be used to reduce the compressive displacement of the spring member, and attachment/detachment operations can be performed with light force, which significantly improves operability and allows the spring member to be attached to and detached from the feed roller. There is less fatigue and wear and tear on the parts, and their durability can be improved.Furthermore, since a cam for attachment and detachment is not required, there is no risk of the members being worn out even if the attachment and detachment operations are repeated.

[Brief explanation of the drawing]

1 and 2 are a side view and a plan view showing a conventional paper pressing roller device for a paper feeding roller, and FIGS. 3 to 6 show an embodiment of a paper pressing roller device for a paper feeding roller according to the present invention. , Fig. 3 is a side view of a sheeter for a rotary printing press that implements this, Fig. 4 is a side view of the paper pressing roller device, and Fig. 5 is a partially broken A of Fig. 4.
6 is a partially cutaway B-view developed plan view of FIG. 4. 22...Web, 26...Dragon Glora, 28...
Paper press roller, 41...Frame, 42...Roller arm, 43...Roller shaft, 44...Stud, 46...Rotation operation shaft, 47...Connection member, 48...Pin, 49...Lever, 50...Spring shaft, 51...Collar ,52,53
...double nut, 54...disc spring.

Claims (1)

[Claims] 1. A pair of left and right roller arms 42 whose center portions are swingably supported by the left and right frames 41, 41,
42, and a paper feed roller 26 parallel to the roller shaft 43 which is mounted between one free end of these roller arms.
A plurality of paper pressing rollers 28 are in contact with the upper web 22, a stud 44 is rotatably provided on the other free end side of the roller arm, and one end is slidably supported by the stud. A screw shaft 50 is pivotally connected to a lever 49 whose end is fixed to a rotating operation shaft 46 on the frame side, and a spring pressure adjustable nut 52 screwed onto this screw shaft is interposed between the stud and the screw shaft 50. A spring member 54, an engaging member 51 fixed to the end protruding from the stud of the screw shaft at a slight distance from the stud, and a pair of stoppers 57 and 58 for restricting rotation of the lever are provided. Features a paper press roller device for the paper feed roller.