JPH0565536U - Paper pressing device for folding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a device that makes it possible to reduce the resistance of a brush until the paper transporting tip end enters between the brush and the body circumferential surface and then leaves the brush. I am trying. [Structure] A brush 17 was supported below the folding cylinder 3. The brush 17 is attached to the arc-shaped brush base 2 along the circumferential surface of the folding cylinder 3.
3 and 24, and a large number of flocked hairs 25 and 26 that are planted from the brush stands 23 and 24 with their tips abutting the peripheral surface of the folding cylinder 3. All the flocked hairs 25, 26 were inclined so as to face the downstream side in the transport direction of the papers 13A, 13B from the base end toward the tip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper pressing device that presses the paper conveyed in contact with the peripheral surface of an origami cylinder in a folding machine against the peripheral surface of the cylinder.

[0002]

[Prior Art]

 The web-fed rotary printing press is equipped with a folding machine that cuts the dried and cooled web after printing into specified lengths and folds this web in the width direction or length direction before or after cutting. Of these, the cutting of the web and origami in the length direction are performed by the origami cylinder group of the folder.

This type of origami cylinder group is provided with a double-diameter cutting cylinder, a folding cylinder, and a gripping cylinder that rotate in synchronism with their peripheral surfaces facing each other. Above the origami cylinder group, a pair of nipping cylinders are provided. A roller is provided. A cutting blade is provided at a location that divides the outer circumference of the cutting cylinder into two equal parts in the circumferential direction, and a cutting blade is provided at a location that divides the outer circumference of the folding cylinder into two equal parts in the circumferential direction. A pair of needles are provided which face the respective cutting blades of the cutting cylinder slightly offset by the rotation of the folding cylinder and the folding cylinder. Further, a pair of insertion knives are provided on the outer peripheral portion of the folding cylinder at positions deviated from the above needles by 90 ° in the circumferential direction, and the outer peripheral portion of the gripping cylinder is provided with a folding cylinder and a gripping cylinder. A gripping plate is provided so as to face each of the above-mentioned insertion knives by the rotation of and.

With such a configuration, the web dried and cooled after printing is guided to the former of the folding machine to be half-folded in the width direction or passes through the former, and then the nipping pin. It is guided between the cutting cylinder and the folding cylinder of the group of origami cylinders through the rollers. At this time, since the origami cylinder group is rotating, the web is cut by the cutting blade for each predetermined length, and then held by the orbiting needle following the cutting blade. A web or signature with a predetermined length, which is held by a needle, is wrapped around its peripheral surface by the rotation of the folding cylinder, and the center of the paper in the lengthwise direction becomes the gripper of the gripper. At the opposite position, the insertion knives protrude from the peripheral surface of the cylinder and hold the center of the paper in the gripper plate, so that the paper is folded in half in the length direction and conveyed by the rotation of the folding cylinder.

However, in such a conventional origami apparatus, the paper held by the needle and conveyed while being in contact with the lower peripheral surface of the folding cylinder is released after the nipping between the cutting cylinder and the folding cylinder is released. The non-retaining state is retained except for the holding edge held by the needle, so the non-retaining part hangs down, the paper edge is exposed, the signature is scratched, and wrinkles and corners are bent, resulting in poor print quality. descend.

Therefore, conventionally, an arc-shaped brush is provided in the vicinity of the peripheral surface of the folding cylinder, and the tip of the bristles is slidably contacted with the paper conveyed along with the peripheral surface of the folding cylinder. It has been proposed to press against the circumferential surface of the body to eliminate the sagging, but in this case, the flocking at the tip of the brush facing the rotary bite between the folding cylinder and the gripping cylinder is held by the needle. This causes a so-called reverse hair state to the tip of the paper and the holding edge of the paper peels off, and this peeling annoyed a large amount of resistance, causing the needle hole of the paper to break and the paper to be bent. However, there is a problem that the quality of printed matter is deteriorated.

In view of this, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-129177, the bristles at the tip of the brush facing the rotary biting part between the folding cylinder and the gripping cylinder are not It is proposed that the folding cylinder be inclined toward the downstream side in the rotation direction.

[0008]

[Problems to be solved by the device]

 However, in such a conventional device, when the paper holding part by the needle enters between the bristles of the brush and the circumferential surface of the body, it is inclined with respect to the circumferential surface of the body even after the approach. There is a problem that the quality of the printed matter deteriorates because the needle holes of the paper are torn or the corners of the paper are bent due to the resistance of flocking.

The present invention has been made in view of the above points, and a folding machine capable of reducing the resistance of the brush from the time when the leading edge of the paper is moved into the brush to the time when the brush is released. An object is to provide a paper pressing device.

[0010]

[Means for Solving the Problems]

 In a paper pressing device for a folding machine, which is equipped with a brush that is supported along the peripheral surface of the cylinder and a large number of bristles that are planted on this table and have their tips attached to the peripheral surface of the cylinder, The bristles were tilted toward the downstream side in the paper transport direction from the base end toward the tip.

[0011]

[Action]

 The web guided between the folding cylinder and the folding cylinder of the folding machine is cut into paper by the cutting blade of the cutting cylinder, and the paper is held by the needles of the folding cylinder and attached to the peripheral surface of the folding cylinder. , The center part is gripped by the gripper plate of the gripper, and it is transported after being folded in half. The paper conveyed while being in contact with the peripheral surface of the folding cylinder is not held except for the tip holding part by the needle, but since the bristles of the brush are attached to this paper, it does not flap. .. In this case, all the bristles are inclined in the anti-reverse bristling direction, so that the bristles do not become a resistance to the transport paper until they enter the brush and leave the brush.

[0012]

【Example】

 1 and 2 show an embodiment of a paper pressing device for a folding machine according to the present invention. FIG. 1 is a side view of a cutting cylinder, a part of a holding cylinder and a folding cylinder of a folding machine according to the present invention. FIG. 2 is also a cylinder array diagram. In the figure, the origami section 1 of the folder is provided with a group of origami cylinders composed of a cutting cylinder 2, a folding cylinder 3 and a gripper cylinder 4 which rotate in the directions indicated by arrows in the figure with their peripheral surfaces facing each other. A pair of nipping rollers 5 are arranged above the origami cylinder group. An unillustrated inverted triangular plate-shaped former is disposed above the nipping roller 5, and the web 6 dried and cooled after printing is half-folded or half-folded in the width direction by this former. Without passing through the former, it is guided to the nipping roller 5. In addition, in this embodiment, the case where the former is not used for folding is illustrated.

A plate-shaped cutting blade 7 extending in the axial direction of the cylinder is provided at a position where the outer peripheral portion of the cutting cylinder 2 is divided into two equal parts in the circumferential direction, and the cutting blade 7 and the cutting blade 7 have substantially the same phase. A needle receiver 8 formed of an elastic material such as rubber is provided at the position so as to sandwich the cutting blade 7. Further, inside the notch 9 provided at a location that divides the outer peripheral portion of the folding cylinder 3 into two halves in the circumferential direction, it is reciprocally moved forward and backward by a predetermined angle by being driven by a cam mechanism at the body end. A moving holder shaft 10 is rotatably supported by the machine frame at its both ends, and a plurality of needle holders 12 each having a needle 11 attached to its free end are mounted on the holder shaft 10. It is fixed in parallel with each other in the direction.

Then, the needle 11, the needle receiver 8 and the cutting blade 7 are configured to face each other by the rotation of the two barrels 2 and 3, and at the time of this facing, the cutting blade 7 moves the web 6 to the papers 13A and 13B. Simultaneously with the cutting, the holder shaft 10 is rotated clockwise to move the needle 11 forward, and the needle 11 holds the paper 13B. During the cutting and holding, the cutting blade 7 is engaged with the groove on the folding cylinder 3 side, and the needle 11 is inserted into a place where the needle receiver 8 is absent.

Further, a pair of notches 14 are provided on the outer peripheral portion of the folding cylinder 3 with a phase difference of 90 ° in the circumferential direction from the notch 9, and in each of these notches 14, A drive knife (not shown) is provided with an insertion knife 15 that advances and retracts in the radial direction of the folding cylinder 3. In addition, a pair of gripping plates 16 that are opened and closed by a cam mechanism or the like at the body end are provided in the outer peripheral notch of the gripper cylinder 4 at a position facing the insertion knife 15 by the rotation of both cylinders 3 and 4. When the insertion knife 15 positioned at the center of the paper 13A (13B) held by the needle 11 and conveyed along the lower end peripheral surface of the folding cylinder 3 faces the holding plate 16, the insertion knife 15 opens and closes. The central portion of the paper 13A (13B) is pushed into the gripper plate 16 and the paper 13A (13B) is folded in half.

Further, in the present invention, a brush 17 is arranged below the folding cylinder 3. That is, between the left and right machine frames, a pair of brush support shafts 18 and 19 are connected and supported at a plurality of points on the way by flexure-preventing connecting plates 20. Holders 21 and 22 are fixed to the holders 19 and 19, respectively. The brush 17 is formed in an arc shape along the lower end peripheral surface of the folding cylinder 3 and is divided into two brush stands 23 and 24 in the circumferential direction of the folding cylinder 3, and is planted on the brush stands 23 and 24. The brush bases 23 and 24 are fixed to the holders 21 and 22 via the brackets 27 and 28, respectively. Further, in the present invention, all the tufts 25 and 26 are inclined so as to go to the downstream side in the paper transport direction from the base end toward the tip.

As a result, the paper 13A (13B) held by the needle 11 of the folding cylinder 3 and conveyed by the rotation of the folding cylinder 3 is pressed against the lower end peripheral surface of the folding cylinder 3 by the bristles 25 and 26 of the brush 17. Since it is conveyed while being conveyed, paper fraying does not occur, and since all the bristles 25 and 26 are inclined in the anti-reverse bristles direction, the resistance against the conveyed paper 13A (13B) is reduced, The needle holes will not break or the corners of the paper will not break.

In this embodiment, the brush stand of the brush 17 is divided in the circumferential direction of the folding cylinder 3 as indicated by the reference numerals 23 and 24, and the bristles 25 and 26 are planted on the brush stands 23 and 24, respectively. Although an example of installation is shown, this is divided for the convenience of maintenance in the notch 14, and it is not always necessary to divide. In the present embodiment, the brush 17 is provided along the lower circumferential surface of the folding cylinder 3, but the present invention is not limited to this. It may be arranged laterally or upward.

[0019]

[Effect of the device]

 As is clear from the above description, according to the present invention, there is provided a base which is supported along the peripheral surface of the body, and a large number of hairs which are planted on the base and whose tips are attached to the peripheral surface of the body. In a paper pressing device for a folding machine equipped with a brush consisting of, all the bristles are inclined toward the downstream side in the paper transport direction from the base end toward the tip, so that they are held by the needles The paper or signature that is conveyed between the brush and the brush bristle is pressed against the body circumference by the brush bristle, so the paper and signature do not flutter and the quality of the printed matter is improved. Can be realized. In addition, because all the bristles of the brush are inclined in the direction of the anti-reverse bristles, the paper and signatures that are always conveyed from the time the paper or signature enters between the brush and the body surface to the time when the brush leaves the brush. Since the resistance against the signature is small, the needle holes of the paper and the signature are not broken and the corners of the paper and the signature are not broken, the quality of the printed matter is further improved, and the amount of waste paper is reduced.

[Brief description of drawings]

FIG. 1 is a side view of a part of a cutting cylinder and a gripping cylinder of a folder embodying the present invention and a folding cylinder.

FIG. 2 is a cylinder array diagram of a folding machine embodying the present invention.

[Explanation of symbols]

 3 folding cylinder 13A paper 13B paper 17 brush 23 brush stand 24 brush stand 25 flocking 26 flocking

Claims (1)

[Scope of utility model registration request] 1. A paper presser for a folder equipped with a brush, which comprises a base supported along the peripheral surface of the body and a large number of bristles which are planted on the base and whose tips are attached to the peripheral surface of the body. In the apparatus, all the above-mentioned hair transplants are inclined toward the downstream side in the paper conveying direction from the base end toward the tip, and the paper pressing device for a folder.