JPH0318444Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a pressurizing device for an infeed roll in a paper feeding section of a foam rotary press.

<Prior art> A form rotary press that prints and processes business forms using web paper is as shown in Figure 3.
It is comprised of a paper feed section 1, a printing section 2, a processing section 3 equipped with a punching device, vertical and horizontal perforation devices, and a paper discharge section 4 equipped with a zigzag folding machine and the like. The paper feed section 1 includes a dancer roll for keeping constant the attractive force of the web 5 that is rewound from the roll, and an infeed roll that feeds the web 5 with the tension maintained constant by the dancer roll to the printing section 2. 6. This infeed roll 6 has a web 5
A pressurizing means is provided for pressing. The conventional pressure means has a support shaft fixed near the in-feed roll 6 parallel to the axis of the in-feed roll 6, and a pair of left and right pressure rollers that contact the in-feed roll 6 on this support shaft. There is a roller system in which the arm is supported so that it can be moved in the axial direction and positioned and fixed with bolts, and as disclosed in Figure 3 of Japanese Patent Application Laid-open No. 59-41266, a number of endless rubber belts are hung around a plurality of rollers. There was also a belt system in which this belt was pressed against the outer peripheral surface of an in-feed roll.

<Problems to be solved by the invention> Business form printing paper that is printed and processed using a form rotary press is manufactured in various sizes.
Therefore, the left and right width dimensions of the web are changed in various ways.

In the case of the conventional roller method described above, when the paper width dimension changes, the pressure position of the roller needs to be changed in accordance with the paper width dimension, but each time the operator changes the roller position manually. This required a troublesome setup for positioning. The endless rubber belt system can handle all changes in paper width, but the rubber belt comes in contact with the entire surface of the paper, which causes the paper surface to become smeared. In this respect, the roller method that presses both the left and right ends of the web is advantageous because even if the left and right ends of the web that are pressed by the roller become dirty, the ears on both the left and right ends will eventually be cut off using the vertical perforations. There is a point.

Further, in the rubber belt method, there are problems such as the belt may break, and when the belt breaks, it is troublesome to replace and repair the belt, and the paper wrinkles.

The present invention solves the problems of the conventional roller method by automatically changing the roller position to correspond to changes in paper width in a roller method that applies pressure to both left and right ends of a winding roll.

<Means for Solving the Problems> The present invention provides a form rotary press equipped with a paper feed section that supplies rolled paper to a printing section and a processing section. A pair of upper and lower guide shafts rotatably supported in the vicinity of the roll, and a feed screw shaft disposed approximately in the center between the two guide shafts and rotationally driven by a stepping motor are installed in the above-mentioned infrastructure. A roller is provided in parallel with the feed roll, and a roller is provided at one end of the guide shaft to contact the circumferential surface of the infeed roll, and the base end is rotatable around the guide shaft in the axial direction. A pair of upper and lower fixed side arms are loosely fitted and supported in a state where movement is restricted, and a pressurizing cylinder that swings and displaces the fixed side arms, and the other end of the guide shaft is provided with an infeed roll. A pair of upper and lower movable arms are provided at their distal ends with rollers that contact the circumferential surface, and are supported so as to rotate integrally with the guide shaft with their base end movable along the guide shaft. The base end portions of the side arms are integrally connected to each other in a rotatable state, and a connecting member is screwed to the feed screw shaft, and a pair of upper and lower base ends are respectively fixed to the guide shafts. It is provided with a link and a pressurizing cylinder that rotates the guide shaft by swinging the link.

<Function> In the present invention, the fixed roller is positioned and fixed at one end of the in-feed roll, and a pressure cylinder applies pressure to the fixed roller via an arm. One of the movable rollers is shifted on the guide shaft via the connecting member by rotating the feed screw shaft in forward and reverse directions based on a change signal of the paper width dimension. Further, the guide shaft is rotated by a pressurizing cylinder, and this is transmitted to the movable arm to apply a pressurizing force to the movable roller.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. 6 is an in-feed roll, and 5 is a web that is hung on the in-feed roll 6. A pair of guide shafts 7a, 7b parallel to the axis of the in-feed roll 6 are rotatably provided on the frame 9 of the paper feed section 1 at upper and lower positions near the in-feed roll 6, and a A feed screw shaft 8 is rotatably provided on the frame 9 at a substantially central position. One end of the feed screw 8 is connected to a stepping motor 10 fixed to the frame 9.

An arm 1 is provided at one end of the guide shafts 7a and 7b.
1a and 11b are rotatably supported in a loose fit and are fixed on guide shafts 7a and 7b,
13 restricts movement in the axial direction. Rollers 14a and 14b that contact the upper and lower surfaces of the in-feed roll 6 are pivotally supported on the arms 11a and 11b, and an air cylinder 1 that is pivotally supported on the frame 9 is also supported on the arms 11a and 11b.
5a and 15b are connected.

An arm 1 is provided at the other end of the guide shafts 7a and 7b.
6a and 16b are supported so as to be movable in the axial direction and rotate integrally with the guide shafts 7a and 7b in the rotational direction. As a means for the arms 16a, 16b to rotate integrally with the guide shafts 7a, 7b, as shown in FIG. It has a structure in which it is supported via an engaging bush 17.

The arms 16a and 16b also have rollers 19a and 19b that contact the upper and lower surfaces of the infeed roll 6.
is pivoted. And the upper and lower arms 16
a, 16b are connected to the arm 16 by the connecting member 20.
a and 16b are connected and integrated to allow rotation. A ball nut 21 is fixed to this connecting member 20, and this ball nut 21 is screwed onto the feed screw shaft 8.

Further, a link 2 is provided at the other end of the guide shafts 7a, 7a.
2a, 22b are fixed, and this link 22a, 2
2b and an air cylinder 23 pivotally supported on the frame 9.
a, 23b are connected, and the air cylinders 23a,
23b to rotate the guide shafts 7a, 7b.

Next, the operation of the above configuration will be explained. Rollers 14a and 14b, which are pivotally supported by arms 11a and 11b on the left in FIG. Since one end of the paper width of the web 5 is always set at a constant position on the infeed roll 6 even if the paper width dimension changes, the rollers 14a and 14b that press one end of this paper width change their positions. There's no need. The rollers 14a, 14b are pressurized by air cylinders 15a, 15b on the guide shaft 7.
It is applied via arms 11a and 11b that have fulcrums a and 7b.

When the paper width of the web 5 is changed, the pressure point on the in-feed roll 6 must be changed because of the roller 19a that presses the other end of the web 5.
19b. After releasing the pressurized state of the rollers 19a, 19b by the air cylinders 23a, 23b, the stepping motor 10 is operated in response to a signal for changing the paper width of the web 5, thereby rotating the feed screw shaft 8 in the forward and reverse directions. The arms 16a, 16b are shifted on the guide shafts 7a, 7b via the ball nut 21 and the connecting member 20, and the rollers 19a, 1
9b is automatically positioned at the pressure point on the other end side of the web 5. Then, the air cylinders 23a, 23b connect the guide shafts 7a, 7 via the links 22a, 22b.
By rotating the arms 16a and 16b,
rotates integrally with the guide shafts 7a and 7b, and the rollers 19
Pressure force is applied to a and 19b.

<Effects of the invention> As described above, according to the invention, the pressure roller that presses both paper width ends of the web on the in-feed roll can be automatically moved and positioned in accordance with changes in paper width. It has the advantage of being able to perform NC control of the roll width, allowing efficient printing and processing of business forms using webs of various paper widths.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of the present invention, FIG. 2 is a sectional view taken along the line taken from FIG. 1, and FIG. 3 is an overall side view of the foam rotary press. 1...Paper feeding section, 2...Printing section, 3...Processing section,
4...Paper discharge unit, 5...Wrap paper, 6...Infeed roll, 7a, 7b...Guide shaft, 8...Feed screw shaft, 10...Stepping motor, 11a,
11b...Arm, 14a, 14b...Roller,
15a, 15b...Air cylinder, 16a, 16
b... Arm, 17... Bush, 18... Concave groove, 19a, 19b... Roller, 20... Connecting member, 21... Ball nut, 22a, 22b...
Links, 23a, 23b...air cylinders.

Claims (1)

[Scope of utility model registration request] In a form rotary press equipped with a paper feed section that supplies rolled paper to a printing section and a processing section, a pair of upper and lower rollers rotatably supported near the in-feed roll provided in the paper feed section are provided. A guide shaft and a feed screw shaft disposed approximately in the center between the two guide shafts and rotationally driven by a stepping motor are provided parallel to the infeed roll, and at one end of the guide shaft, A pair of upper and lower rollers are provided at the distal end of the roller that contacts the circumferential surface of the in-feed roll, and are loosely supported with the proximal end rotatable around the guide shaft and restrained from moving in the axial direction. A fixed side arm and a pressure cylinder for swinging and displacing the fixed side arm are provided, and at the other end of the guide shaft, a roller that contacts the circumferential surface of the infeed roll is provided at the tip, and a base A pair of upper and lower movable arms are supported so as to rotate integrally with the guide shaft while their ends are movable along the guide shaft, and the base ends of both movable arms are rotatable relative to each other. A connecting member that is integrally connected and screwed to the feed screw shaft, and a pair of upper and lower links whose base ends are respectively fixed to the guide shaft, and the links are oscillated to drive the guide shaft to rotate. 1. A pressurizing device for an infeed roll in a foam rotary press, characterized in that it is provided with a pressurizing cylinder.