JPH042936Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a chopper device attached to a folding machine of a web-fed rotary printing press, which works with a descending chopper blade to grip a signature and fold it in half. This relates to the engraved roller.

[Conventional technology]

The folding machine of a web rotary printing press has a former folding device that folds the web in half in the width direction after printing, a parallel folding device that folds the web in half in the length direction, and a folding machine that stops the parallel folded signatures midway through transportation. It is equipped with a chopper device for further folding in half in the transport width direction, and each of these devices is selected according to specifications of the signature and used alone or in combination.

Among these devices, the chopper device has a paper stopper placed in the signature conveyance path to face the signature and stop it, and a paper stopper that moves down toward the center fold line of the stopped signature and pushes the fold line into the gap in the mouthpiece. It is equipped with a chopper blade that folds the folded signatures, and a pair of gripping rollers that grasp the pushed signatures and send them downwards.The sent signatures are ejected onto the conveyor by the lower impeller and conveyed. be done.

The pair of gripping rollers of such a chopper device have conventionally been generally constructed as shown in a front view in FIG. That is, one of the pair of gripping rollers 1 is rotationally driven, and the other is rotated by being pressed against the driving roller by a spring force. And on the circumferential surface of both gripping rollers 1,
A plurality of annular grooves 2 are provided facing each other in order to engage the signature guide that guides the signatures to the lower impeller and to remove the air that accumulates between the paper sheets when the signatures are held in the mouth. It is being Further, the peripheral surface is provided with grooves 3 or knurled to ensure that it can be held firmly in the mouth.

[Problem that the invention attempts to solve]

However, in such conventional gripping rollers, when the chopper blade descends to grip the signature between both gripping rollers 1, the corners 4 of the grooves 2 are sharp, and the grooves 3 and Due to the unevenness of the knurling process, a problem occurred in that the signatures were pinched and damaged at the corners 4.

[Means for solving the problem] In order to solve these problems, the present invention chamfers the entrance periphery of the annular groove provided on the peripheral surface, and also applies anti-slip processing to the peripheral surface near the chamfered periphery. This part was made into a smooth circumferential surface.

[Effect]

After parallel folding, when the conveyed signature stops, the chopper blade descends toward the fold line of the signature, grips the signature through the gap in the mouthpiece, pushes the signature between the rollers, and folds it in half. At this time, the signatures are pushed between the gripping rollers without air release and damage due to the provision of smooth and chamfered annular grooves on both sides of the roller circumferential surface.

〔Example〕

1 and 2 show an embodiment of the gripping roller according to the present invention, FIG. 1 is a front view of a chopper device of a folding machine in which this is implemented, and FIG. FIG. 3 is a plan view with upper members removed. In the figure, the chopper device 11 is folded in parallel and then transferred to the first fold by a conveyor belt (not shown).
A corner stay 14 is provided in the conveyance path of the signatures conveyed from the front side in the figure to the paper back side, that is, from the bottom to the top in Figure 2, and connects the front and rear side plates 12, 13 and their four corners. Subframe 1 consisting of
5, and the conveyor belt is stretched over a plate 16 that covers the upper surface of the plate 16. Reference numeral 17 denotes a pair of left and right caps that are installed in the central opening of the plate 16 and extend in the front-back direction, and are disposed on both sides of the movement path of the center fold line of the signature. Below the caps 17, A gripping roller 18 whose both ends are pivotally supported by the front and rear side plates 12 and the front and rear side plates 1
Another gripping roller 20 is supported movably in the horizontal direction by the gripping roller 20 and is biased by a compression coil spring 19 so as to come into pressure contact with the gripping roller 18. It is set up. 21 is a fixed arm shaft 2 at the upper end of one side of the subframe 15
The chopper arm is rotatably supported by the tipper arm 2, and at its tip facing above the mouthpiece 17, a chopper blade 23 formed from a thin plate in the shape of a rectangular vertical plate is held between a bar and a presser foot. Fixed. The drive shaft 2 is attached to the chopper arm 23.
A locking arm 26 is integrally formed with its lower end pivotally connected to the other end of the link 25 which is pivotally connected to the eccentric portion of the drive shaft 24, and extends downwardly. The chopping arm 21 is configured to reciprocate by a predetermined angle through the opening. And Chiyotsupa Arm 21
As a result of the reciprocating rotation, the tipper blade 23 moves up and down toward the gap between the mouthpieces 17, folds the signature in half from the fold line, passes through the gap between the mouthpieces 17, and holds it between the left and right gripping rollers 8 and 10. It is configured to allow Then, both gripping rollers 8, 10
includes a pair of signature guides 33 and 3, which will be described later.
two annular grooves 27, into which the grooves 5 are respectively engaged;
28 are provided facing each other, and each annular groove 2
Inlet peripheral edges 27a and 28a of 7 and 28 are chamfered. In addition, the gripping rollers 18, 20
Knurling processes 18a and 20a are respectively applied to the peripheral surfaces of the openings to prevent slipping, but these knurling processes 18a and 20a are not applied near the entrance peripheral edges 27a and 28a, and the smooth peripheral surfaces 18b , 20b.

Reference numeral 30 denotes a plurality of impellers arranged in parallel on an impeller shaft 31 located diagonally below the gripping rollers 18 and 20 and mounted between the front and rear side plates 12 and 13, each impeller 30 having an impeller. It is formed of a disc 30a fixed to the axle 31 and a plurality of blades 30b attached at equal intervals around the entire outer circumference of the disc 30a. Each blade 30b is made by bending a rectangular thin plate into an arc shape. It is formed as follows. The impeller 30 rotates in the direction indicated by the symbol B in FIG.
8 and 20, a brush support shaft 42 is pivotally supported by left and right brackets 43 and 44 fixed to the stay 14, and is supported by the brush support shaft 42 so as to be able to rise and fall freely, so that the chopper blade 23 is sandwiched from both sides. A brush 46 is fixed to a brush stand 45 extending in parallel with the tip of the brush 46 in sliding contact with the plate 16. By doing this, the brush 46 is configured to hold down both pieces of the signature pushed into the gap between the mouthpieces 17 by the chopper blade 23 until they are completely pushed in, thereby blocking them from touching the chopper blade 23 and the like. 47 is a handle that rotates the brush support shaft 42 to put the brush 46 in use or non-use state, and 48 is a handle that rotates the adjustment shaft 49 and controls the brush 46 through bevel gears 50, 51 and a screw shaft (not shown). This is a knob that can be raised or lowered slightly to accommodate the thickness of the signature.

The operation of the chopper device configured as above will be explained. If chip folding is not to be performed, the brush 46 and a paper pad (not shown) are separated from the plate 16 to be out of use, and the chip folded signature pushed out from the drive shaft 24 is inserted between the rotating blades 30b. is conveyed and discharged onto the conveyor 32 below. Reference numeral 33 denotes a signature guide which is supported by the corner stay 14 via an arm 34 and which holds the entire width of the plurality of impellers 30 from both sides, and whose upper end is engaged in the annular groove 27 of the gripping roller 18. It is configured so that both ends of the signature held by the blade 30b and circulating are brought into sliding contact and guided. Reference numeral 35 denotes a signature guide supported by the corner stay 14 via an arm 36, whose upper end is engaged in the annular groove 28 of the gripping roller 20, and which is held by the blades 30b and conveyed. Guide by sliding the plane of the blade into contact. 37 is the screw shaft 3 attached to the stay 14.
8 and a holder 39 etc., it is a movable guide that guides the signatures following the signature guide 35, and is supported so as to be adjustable forward and backward.
This is a contact plate that abuts the tips of the signatures supported through the blades 30b and conveyed by the blades 30b to release them from the hold by the blades 30b and discharge them onto the conveyor 32.

Further, when the machine is operated in such a manner that the chopper arm 21 does not rotate toward the upstream side of the signature conveyance side, the parallel folded signatures are conveyed by the conveyor belt, pass through the chopper device 11, and are discharged.

When performing chip folding, operate the handle 47 to bring the brush 46 into sliding contact with the plate 16,
Also lower the paper pad. Furthermore, the drive shaft 24 is made rotatable. Then, when the machine is operated, the signatures conveyed by the conveyor belt after parallel folding come to a stop when they hit the paper rest. At the same time, the drive shaft 24 rotates and the link 25 pivotally connected to the eccentric portion thereof rotates, so that the rocker arm 26 pivotally connected to the link 25 rotates.
swings, and the chopper arm 21 integrated therewith reciprocates by a predetermined angle on the arm shaft 22. That is, the chopper blade 23 descends toward the stopped fold line position, pushes this fold line part into the gap in the mouthpiece 17, and causes the grip rollers 18 and 20 to grip it. In this case, the upper gripping roller 2
0 is pressed against the other gripping roller 18 by a compression coil spring 19, and the peripheral surface is knurled 18a, 20a, so the signature is gripped without slipping. In this gripping, the entrance periphery 27 of the annular grooves 27 and 28
a, 28a are chamfered, and smooth peripheral surfaces 18b, 20b are provided on both sides thereof, so that
The signatures that are put into the mouth are put into the mouth without being damaged. Furthermore, since both sides of the signature held in the grip are held down by the brush 46, even if it is released from the conveyor belt, it will not jump up, and will not get dirty or damaged by touching the chopper blade or the like. Note that the annular grooves 27 and 28 also serve as air blowers when the signature is held in the signature. The signatures held in the mouth are pulled out downward and thrown between the blades 30b of the rotary impeller 30, held by the blades 30b, and passed through the signature guide 33,
35 and the fixed guide 37. The transported signature contacts the contact plate 40,
As only the impeller 30 continues to rotate, it is discharged onto the conveyor 32 and transported.

In addition, in this embodiment, the gripping rollers 18, 20
Although knurling is exemplified as an anti-slip process applied to the circumferential surface of the seat, a groove process as shown in FIG. 3 may also be used.

[Effect of idea]

As is clear from the above explanation, according to the present invention, the entrance periphery of the annular groove provided on the periphery of the gripping roller in the chopper device of the folding machine is chamfered, and the periphery is non-slip processed near the chamfered periphery. By making this part a smooth circumferential surface, the signature pushed between both gripping rollers by the chopper blade will not come into contact with sharp parts or uneven parts.
There is no dirt or damage, and the amount of waste paper is reduced.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the gripping roller in the chopping device of a folding machine according to the present invention, FIG. 1 is a front view of the chopping device of a folding machine in which this is implemented, and FIG. FIG. 3 is a plan view showing the gripping roller with parts above it removed, and FIG. 3 is a front view of the conventional gripping roller. 11... Chopper device, 18, 20... Gripping roller, 18a, 20a... Knurling processing,
18b, 20b... Smooth surface, 27, 28... Annular groove, 27a, 28a... Inlet periphery.

Claims (1)

[Scope of utility model registration request] A chopper device for a folding machine, characterized in that the entrance periphery of an annular groove into which a signature guide is inserted is chamfered, and the peripheral surface is not subjected to anti-slip processing near the chamfered periphery, making this part a smooth periphery. A roller caught in the mouth.