JPH0136836Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet discharging device for slowing down paper conveyed after cutting in a sheeter attached to a web rotary printing machine, and then discharging the paper onto a paper stacking table.

Web rotary printing machines that feed the web wound around the take-up spindle of a paper feeder to a printing unit and print on it are equipped with a folding machine that cuts and folds the printed web into predetermined dimensions. Depending on the specifications of the printed material, a paper ejecting device called a sheet feeder or sheeter is attached, which cuts the printed web into a predetermined size and ejects the web without folding it.

This type of sheeter uses a drag roller at the entrance to send out the web that is continuously fed in from the printing unit, and while it is being held and conveyed by multiple sets of upper and lower endless conveyor belts that are parallel to each other in the axial direction, a cutter is used to cut the web into predetermined sizes. At the end of the conveyance, the paper is cut into strips and discharged onto the paper stacking table to be stacked. A paper device is provided.

FIG. 1 is a side view of a conventional paper ejecting device. This will be explained based on the figure. An upper high-speed conveyor belt 1 and a lower low-speed conveyor belt 2 run in the direction shown by arrow A in the figure. are stretched in a manner shifted in the transport direction, and a pair of left and right pins 3 are provided near the transport end of the high-speed transport belt 1, protruding inward from the machine frame on the front side and the machine frame on the back side of the paper. has been done. The subframe, which is indicated by 4 as a whole, is integrally formed in a frame shape with a pair of left and right roller arms 5 and strip-shaped stays 6 and 7 that connect the two places on the front and rear of the roller arms. 4 has a rear end of a roller arm 5 rotatably supported by the pin 3. The left and right roller arms 5 have a pair of front and rear roller shafts 8 and 9 that are rotationally driven from the driving side.
is pivoted. A plurality of paper feed rollers 10 and brake rollers 11 having the same circumferential speed as the running speed of the low-speed conveyor belt 2 are mounted on these roller shafts 8 and 9 so as to face each other. Of these, the paper feed roller 10 is attached to the peripheral surface of the paper feed roller 12 via the low-speed conveyance belt 2. A pair of adjustment bolts 13 are attached to the rotating end of the roller arm 5.
is screwed in, and its tip is screwed into a stud 14 installed in the frame, and loosening is regulated with a nut 15. Reference numeral 16 designates rotating handles provided at two locations in the longitudinal direction of the stay 6, reference numeral 17 designates a stopper protruding from the frame, and reference numeral 18 a tension device for the low-speed conveyor belt 2.

In the conventional paper discharging device configured as described above, the paper that is conveyed while being held between the upper high-speed conveyor belt 1 and the lower low-speed conveyor belt 2 is transferred between the brake roller 11 and the low-speed conveyor belt 2. When passing through the paper, the running speed is reduced and the edges of the paper are aligned so that the leading paper and the following paper slightly overlap. The paper is held between the conveyor belt 2 and the paper feed roller 10, and as the paper rotates, it is discharged onto a paper stacking table (not shown). Then, by loosening the nut 15 and rotating the adjustment bolt 13, the subframe 4 swings around the pin 3, and the subframe 4 swings on the brake roller 11, the low-speed conveyor belt 2, the paper feed roller 10, and the paper feed roller 12. The contact pressure between the belt 2 and the belt 2 is adjusted. When necessary, such as when threading paper before starting work or when a paper jam occurs, loosen the adjustment bolt 13 greatly, separate it from the stud 14, grasp the handle 16, and move the subframe 5 to the chain line position where it hits the stopper 17. Rotate it wide until it opens and work on it.

However, in the conventional paper discharging device configured as described above, since the paper feed roller 10 and the brake roller 11 are supported by the same subframe 4, by adjusting the adjustment bolt 13, both rollers 10, 11 can be adjusted. The contact pressures of the two change at the same time, and these cannot be adjusted independently, making it impossible to expect satisfactory and stable paper ejection.

That is, the brake roller 11 has the function of decelerating the paper conveyed at high speed to a required speed by sandwiching it with the low-speed conveyance belt 2, and also has the function of decelerating the paper conveyed at high speed to a required speed. 11, it also has the function of aligning the paper edges by adjusting the pressure of the brake rollers 11, which are arranged in parallel in the axial direction, against the low-speed conveyor belt 2 so that the left and right sides are different. Therefore, for example, when adjusting only one of the pair of left and right adjusting bolts 13 to align the paper edges and changing the pressure of the left and right brake rollers 11 on the belt 2, the pressure of the paper feed roller 10 on the conveyor belt will change. However, since it is close to the adjustment end (swinging end), it changes greatly, resulting in a problem that smooth paper feeding cannot be performed. Note that if you adjust the pressure on the paper feed roller 10 side to ensure smooth paper ejection, the pressure on the brake roller 11 side will change, which will not only make it impossible to align the paper, but also cause the paper to be conveyed incorrectly. changes their posture.

The present invention was developed in view of the above points, and includes a first sub-frame whose swing can be freely adjusted, which is arranged in parallel on a roller shaft that supports a paper feed roller on the rotating end side.
The second sub-frame is pivotably supported, and the second sub-frame is provided with a brake roller shaft in which brake rollers are arranged in parallel, and a pair of left and right adjustment screws for adjusting the swing of the paper feed roller. The present invention provides a sheet discharging device for a sheeter for a rotary printing press, which achieves stable sheet discharging by making it possible to independently adjust the brake roller and the brake roller. Embodiments of the present invention will be described in detail below with reference to the drawings.

2 to 4 show an embodiment of the paper discharging device according to the present invention, FIG. 2 is a side view of a sheeter for a rotary printing press in which this is implemented, and FIG. 3 is a side view of the paper discharging device. Figure 4 is also a developed cross-sectional view. In these figures, at the inlet of the sheeter 21, guide rollers 23, 24, and 25 that guide the web 22 that has been dried and cooled after printing and are sent, and a drag roller 26 that is rotated by being rotationally driven from the driving side are disposed. Web 2 on Dratsu Glora 26
A plurality of paper pressing rubber rollers 27 are pressed against the drag roller 26 and feed the web 22 while holding it therebetween. A cutting device 30 is disposed on the downstream side of the drag roller 26, and includes a rotating cylindrical cutting drum 28 having a cutter at one location on its circumference, and a blade holder 29 below the cutting drum 28. On the downstream side, there are a plurality of high-speed conveyor belts 31 stretched in a triangular shape between a plurality of sets of belt rollers arranged in parallel in the axial direction, and a plurality of high-speed belts 32 stretched in an inverted triangular shape. arranged above and below. code 3
The one indicated by 3 is a low-speed conveyance belt that is continuously stretched over the high-speed conveyance belt 31 in the conveyance direction, and runs at a lower speed than the high-speed conveyance belts 31 and 32, and is cut by the cutting device 30 before being conveyed at high speed. belt 3
1 and 32, the paper 34 is conveyed by a brake roller 54 and a kick timing device 35, which will be described later.
The structure is such that the sheets are overlapped while being shifted little by little in the conveyance direction in cooperation with the conveyance direction. Furthermore, two tension rollers 36 supported by arms are attached to the low-speed conveyor belt 33.

A paper discharge device 38 is provided above the conveyance end portion of the low-speed conveyance belt 33 to discharge the paper 34 together with the low-speed conveyance belt 33 onto a paper stacking table 37 . That is, a pair of left and right pins 39 are provided near the terminal end of the upper high-speed conveyor belt 31 and protrude inward from the frames 40 on both sides. A first sub-frame 43 formed in a frame shape by an arm 41 and strip-shaped stays 42 and 50 connecting the swinging end side and the base end side of the arm 41 is swingably supported. At the swinging end of the subframe 43, a roller shaft 45, which is drivingly connected to the driving side by a gear 44, is located above a paper feed roller 46 to which the end of the low-speed conveyor belt 33 is attached, and is rotatably mounted on the shaft. supported. On this roller shaft 45, a plurality of paper feed rollers 47 are mounted in parallel in the axial direction and are in contact with each other via a low-speed conveyor belt 33 whose circumferential surface is attached to the circumferential surface of the paper feed roller 46. has been done. In addition,
The structure described so far is not substantially different from the structure shown in FIG. 1 described above.

A second sub-frame designated by the reference numeral 48 as a whole is formed by a pair of left and right roller arms 49 formed in an inverted F-shape when viewed from the side, and is provided at the center of the roller arm 41. A base end portion of the roller arm 49 is swingably supported by a pin 51. Between the approximately central portions of the left and right roller arms 49,
A roller shaft 53 drivingly connected to the roller shaft 45 by a chain 52 is rotatably mounted,
On this roller shaft 53, a plurality of brake rollers 5 are mounted.
4 faces the paper feed roller 47 and is a low-speed conveyor belt 33
It is pivoted so that it is in contact with the

This paper discharge device 38 is provided with two roller pressure adjustment devices. That is, an adjustment bolt 56 is screwed into a screw receiver 55 protruding from the swinging ends of the left and right roller arms 41 so that it can be adjusted forward and backward, and this adjustment bolt 56 is further inserted into a stud 57 that protrudes from the frame 40. It is screwed into the head. Therefore, by loosening the nut 58 and rotating the adjustment bolt 56, the contact pressure of the paper feed roller 47 against the belt 33 on the paper feed roller 46 and the contact pressure of the brake roller 54 against the low speed belt 33 can be adjusted simultaneously. adjusted. On the other hand, a stud 59 rotatably attached to the swinging end of the roller arm 49 has a
An adjusting screw 61 with a knob 60 is rotatably supported by collars 62 and 63 with its movement in the axial direction restricted, and the threaded end of the adjusting screw 61 is connected to the base of the other roller arm 41. It is screwed into a stud nut 64 rotatably supported at the end. Therefore, when the adjusting screw 61 is rotated, only the second subframe 48 swings, and the contact pressure of the brake roller 54 with respect to the low-speed conveyor belt 33 is adjusted. What is indicated by the reference numeral 65 is the stud 59.
This is a leaf spring that is fixed to the collar 62 and engages a protrusion in a groove provided in the collar 62 to restrict loosening of the adjustment screw 61 due to vibration or the like.

Further, 66 is a handle installed on the stay 42, and 67 is a stopper installed on the frame 40. After greatly loosening the adjustment bolt 56 and separating it from the stud 57, the handle 66 can be grasped and the sub. By rotating the frame 43,
The sub-frame 43 is configured to rotate significantly to a position shown in chain lines where it abuts the stopper 67, thereby opening the upper part of the low-speed conveyor belt 33.

In the sheeter configured as described above, when the printing operation is started, the web 22 that has been dried and cooled after printing is pulled out by the rotation of the drag roller 26 and the paper pressing rubber roller 27 pressed by the drag roller 26, and is pulled up and down. The blade of the cutting cylinder 38 and the blade holder 29 are conveyed by the high-speed conveyance belts 31 and 32 and rotated.
The paper 34 is then cut to a predetermined length. paper 3
4 is transported at high speed by high speed transport belts 31 and 32 until the end of the paper hits brake roller 54, and travels at low speed by contacting brake roller 54 and being sandwiched by low speed transport belt 33. On the other hand, due to the action of pushing down the trailing edge of the paper by the kick timing device 35, the paper that is being conveyed next at high speed is placed on top of the paper 34 that is traveling at low speed earlier.
It slides on the same paper and runs at high speed, acting in the same way as the previous paper, and is stacked like so-called sashimi. Paper feed roller 46 and paper feed roller 47 rotating in this state
The paper is captured and pulled out, and discharged onto the paper stacking table 37 and stacked thereon. Note that the operations up to this point are not particularly different from conventional devices under normal conditions.

In sheet feeding work performed in this way, the edge of the paper becomes non-parallel to the roller axis and the brake roller 5
4. To adjust the contact pressure in step 4, while the machine is running, grasp one of the pair of left and right knobs 60 while checking the paper ejection condition, and turn the adjustment screw 6.
1, one of the roller arms 49 swings due to the threaded engagement of the threaded part with the stud nut 64, causing a difference in the pressure of the brake roller 54 against the paper in the width direction (slight slippage), which prevents paper alignment. It is done. Note that by performing this on both the left and right sides, the entire subframe 48 swings, and the contact pressure of the brake roller 54 against the low-speed belt 33 is adjusted independently regardless of the paper feed roller 47. Also,
Paper ejection can also be adjusted in the same manner as described above. Furthermore, when the nuts 58 are loosened and the adjustment bolts 56 are rotated on both the left and right sides, the entire first subframe 43 swings, and the low-speed conveyor belt 33
The contact pressure of the brake roller 54 against the paper feed roller 46 and the contact pressure of the paper feed roller 47 against the paper feed roller 46 are simultaneously adjusted. In this case, the paper feed roller 47 that is far from the fulcrum is mainly adjusted, and the brake roller 54 that is closer to the fulcrum hardly moves. Adjustment of the brake roller 54 by the second subframe 48 is desirable. Furthermore, when it is desired to open the upper part of the low-speed conveyor belt 33 in the event of a paper jam or when threading paper in preparation for printing, the adjustment bolt 56 is greatly loosened, separated from the stud 57, and the handle 66 is grasped. By then rotating the first sub-frame 43 to the position indicated by the chain line where it abuts the stopper 67, the first sub-frame 43 is opened wide and work can be done easily.

As is clear from the above description, according to the present invention, in a sheet discharging device for a rotary printing press, a swingable first sub-frame in which paper feed rollers are arranged in parallel is connected to a swing-adjustable second subframe. The sub-frame is pivotally supported, brake rollers are arranged side by side on the swinging end side, and adjustment screws are provided, so the contact pressure between the brake roller and the paper feed roller can be adjusted independently, and the machine can be operated easily. Since this can be done while checking the paper discharge condition, it is possible to ensure a very stable paper discharge condition even during high speed rotation, and the adjustment can be easily made in a short time, improving work efficiency.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional sheet discharging device for a rotary printing press, and FIGS. 2 to 4 show an embodiment of the sheet discharging device for a rotary printing press according to the present invention. FIG. 3 is a side view of a sheeter for a rotary printing press in which this is implemented, FIG. 3 is a side view of a paper discharge device, and FIG. 4 is a developed cross-sectional view. 33...Low speed conveyor belt, 40...Frame,
43...first subframe, 45...roller shaft,
46...Paper feed roller, 47...Paper feed roller, 4
8...Second subframe, 53...Roller shaft, 5
4...Brake roller, 56...Adjustment bolt, 61
...Adjustment screw, 64...Stud nut.

Claims (1)

[Scope of utility model registration request] A roller shaft 45 whose base end is swingably supported on the machine frame 40 and has paper feed rollers 47 arranged in parallel on the swing end side facing the low-speed conveyor belt 33, and a pair of left and right adjustment bolts 56. In a sheet discharge device for a sheeter for a rotary printing press having a first subframe 43, a second subframe 42 is pivotably supported on the first subframe 43, and the subframe 42 is pivotably supported on the first subframe 43. The low-speed conveyor belt 33 is placed on the swinging end side of the
A rotary wheel is provided with a roller shaft 53 on which brake rollers 54 are disposed in parallel, and a pair of left and right adjusting screws 61, and a stud nut 64 screwed onto the adjusting screws 61 is provided on the first subframe 43. Paper ejection device for printing presses.