FR2472472A1 - DEVICE FOR CONTROLLING THE FOLDING VALVES OF A ROTARY PRINTING MACHINE CHECK VALVE CHECK VALVE - Google Patents

Abstract

A. DEVICE FOR CYLINDER WITH ODD NUMBER OF VALVES ACTED BY CAM PLATES. B. CHARACTERIZED IN THAT THE BENDING VALVES 8 WHICH FOLLOW IN DIRECTION OF THE ROTATION OF CYLINDER 1 ARE ACTUATED ONLY IN THE CASE OF A COLLECTION OF PRODUCTS AT A LOCATION A, AND THE PREVIOUS VALVES 10 DIRECTING TO ROTATION, ARE ACTUATED ONLY IN THE CASE OF TAKING PRODUCTS IN TWO LOCATIONS B AND C, EACH BY A CAM PLATE 7, 9 TURNING IN THE DIRECTION OF ROTATION OF CYLINDER 1, WHOSE ROTATION SPEED RELATIVE TO THAT OF THE CYLINDER, IS IN A RATIO OF 23 OR 43 FOR A CYLINDER PROVIDED WITH THREE PAIRS OF I, II, III VALVES REGULARLY SPACED ON ITS PERIOD, OR A RATIO OF 45 OR 65 FOR A CYLINDER WITH FIVE PAIRS, OR A RATIO OF 67 OR 87 FOR A CYLINDER PROVIDED WITH SEVEN PAIRS OF VALVES ON ITS SURROUND. C. DEVICE APPLICABLE TO ROTARY PRINTERS.

Description

-

  The invention relates to a device for the com-

  The invention relates to folding valves of a folding cylinder of a folding apparatus for a rotary printing machine, having an even number of pairs of folding valves whose pivoting is controlled by cam plates. It is often necessary to realize on

  products, after a first transverse folding produced from a

  Knowing that the working speed of the device is limited by the third folding, it is frequent, with a view to the cooperation of a knife cylinder and the folding valve cylinder, a second longitudinal folding and a third folding. the full flow capacity of the rotating machine, to distribute the products on two of these

folding devices.

  In the case of a folding valve cylinder equipped with an odd number of pairs of folding valves, the products are delivered at a certain location, and are then distributed, by a controlled switch, on two conveyor belts connected for example each To a device for producing the third folding, the invention then resides in that. As a general rule, the lower conveyor belt can not be

  brought far enough into the switch, so that

  to be guided precisely even in the transit zone.

  between the valve cylinder and the conveyor belt.

  In addition, the possibility of access to this area is strongly

  promised, which leads to congestion.

  Independently of this, there are also problems for the control of the folding valves of

  rotary printing at high speed of rotation, the following rollers

  Cam followers that roll on the fixed cam curves, as well as the pivoting levers that connect them to the folding valves, are subjected to a high dynamic load due to the large difference in speed between rollers and trays, with cam curves. This results in an irregular walk of the rollers as well as an increase in the noise and the wear of the transmission mechanisms. In order to reduce the difference in speed between plates and cam rollers, it has been proposed, according to the patents: DE. 633,756 and DE 2,316,227 to reduce the diameter of the cam plate. However, this measure requires, compared to current solutions, with a pivoting lever supported at one end in

  the cylinder with valves, and carrying at its other end

  cam lugs, additional transmission members, for example pushers. This inevitably results in an increase in the inertia forces of the mechanism and an increased number of

  points of articulation and guidance for these trans-

  mission, which ultimately results in a negative influence on the desired increase in production capacity, due to

  increased wear and imprecise transmission of

  ments. The object of the invention is to improve the operational safety of a control device for

  folding of a cylinder with valves for folding apparatus

  rotary printing machines with odd number of valve pairs, the pivoting folding valves of which are actuated by cam plates, for the purpose of increasing the capacity

  production of the folding apparatus.

  The invention proposes, for this purpose, for such folding devices, a sfr operating solution for high-speed machines, of universal application, for a product stream sharing, after the valve cylinders,

  to reduce dynamic load and wear

  positive control of the valves, including cam rollers and transmission members connecting them to the folding valves, relative to known solutions, the device of the invention is characterized in

  than the folding valves that follow in the direction of

  of the cylinder, are actuated only in the case of a sampling of products at a location, and the valves which precede in the direction of rotation, are actuated only in the case of a sampling of products in two locations, each by a a cam plate rotating in the direction of rotation of the cylinder, whose speed of rotation relative to that of the cylinder is in a ratio of 2/3 or 4/3 for a cylinder provided with three pairs of valves evenly spaced around its periphery, or a ratio of 4/5 or 6/5 for a cylinder provided with five pairs or a ratio of 6/7 or 8/7 for a cylinder provided with seven pairs of flaps on its periphery, the curves

  cam trays being provided, in the same series of euc-

3.-

  two or four for three pairs of flappers, of four

  one or six for five pairs of flaps and six or eight for

  seven pairs of flaps, each curve having an ascending zone

  and a downward zone, the control curve of trane-

  product mission having actuating zones arranged at the same spacing, while in the product sampling control curve, with respect to the product transmission control curve, each second operating zone is shifted, in dependence. the number of operating zones of the curve, as well as the angle θ between the two product sampling locations, of an angle c; = L, oriented in direction

  opposite to the direction of rotation, in the case of

  faster than the valve cylinder, and in the direction of the

  direction of rotation, in the case of a longer turning curve

that the valve cylinder.,

  This solution allows, in a cylinder to

  folding pets equipped with an odd number of flaps,

  a sample of products at two locations, which can be

  It can be chosen at will from the inside of the folding apparatus, depending on the existing spatial conditions. It is thus possible to perform a functional sharing str

  product stream at the outlet of the valve cylinder. advantageous

  the two conveyor belts can be arranged

  in the form of points, so that the guiding

  in these areas is improved. Because of this security

  In the case of increased weight, the throughput of the folding apparatus can be increased.

  Access to referrals can be significantly improved.

  The two partial streams may be subsequently directed by each of the conveyor belts to a device for producing the third folding operation

reduced speed.

  Another advantage is that with continuously rotating cam plates, in reducing the difference in speed between them and the follower rollers that roll on them. An increase in flow is favored by the reduction of the dynamic load of the control device of the

  valves. Transmission mechanisms are subject to a

  dre wear and the operating safety of the device is increased. In addition, the noise produced by the cam followers is

diminished.

4.- 2472472

  Given the transmission ratios

  higher up between cam plate and roller roller, the speed of the rollers is reduced, for three pairs of rollers to 1/2 or 1/4, for five pairs of rollers, to 1/4 or 1/6, and for seven pairs of rollers at 1/6 or 1/8 of the speed of a pebble

rolling on a fixed curve.

  the principle of the solution of the invention can

  to be applied also in the case where printing requirements are

  different designs are planned to be made after the second

  (first transverse folding) and possibly after the third

second fold.

  To allow a variation of the two places

  collection of products, it is advantageous to provide,

  according to the invention, that the cam plate for the action-

  previous folding valves in rotation, is con-

  characterized by two axially offset bodies of curves, one of which is provided with a curve, each second actuating zone having a lower engagement increased to the maximum angle CY, and the other being provided with a curve serving

  lateral-variable recovery of this operating zone.

  The two curve bodies are adjustable in position and, on each

  that curve, circulates a follower roller, these rollers being arranged

  close to each other, each on an axis attached to a lever of

  let for the actuation of a previous valve in rotation. By appropriate rotational movement of the two camming bodies, each second operating zone can be varied by a selected angle θc × 4cxmax, in which case the position of the two product sampling locations is changed.

  according to the relation CS = -.

  In the limit case CC = 0, the sampling of

  products takes place in one place. This variation of

  placement of the products within the scope of the

  Such a folding device offers great advantages for a production conversion, obtained with a small expense, of a device equipped according to the invention, for example instead of a

  folding 2 x 3, direct evacuation after folding 2, or

  core for further processing of a conventional folding apparatus in the case of variable production conditions on

  the basis of the optimal capacity to adapt to the conditions of

already existing.

24724? 2

5.-

  A variant of an advantageous solution for the en-

  For example, in accordance with the invention, a cam gear connected to the drive of the folding apparatus engages with a gear wheel fixed to a cam gear for controlling the folding valves. cylinder shaft shaft of a folding knife cylinder carrying a sheet guide member to be folded. This gear wheel drives two

  platens with control cam of the folding valves, through

  intermediate wheels, two of which are

  placed on each side of the folding apparatus and are

  interconnected by a shaft, this first toothed wheel and the engaged wheel being in common, with a wheel which is engaged with a toothed wheel of the folding valve cylinder, wheel of the same size fixed on a hollow shaft of a knife cylinder receiving the sheet guiding element, this wheel of the same size being provided, however, with an oblique tooth pitch

  opposite, engaged with a double axially displaceable gear wheel

  partly dented teeth are equipped with a

  oblique ture adapted to each of the gear wheels meshing with

she.

  This mode of entralment offers the advantage of a possibility of shifting of the folding, ie the rotational movement of the cylindrical body of the knife cylinder carrying the folding knife, including the folding valve cylinder, by relative to the cylinder body of the knife cylinder carrying the sheet guiding elements without having to move the plateaulyx control cam of the folding valveso The invention is explained below with the aid of an embodiment with Referring to the accompanying drawings, in which: FIG. 1 is a longitudinal sectional view through a folding valve cylinder with partial representation of the cylinder drive and cam plates for the control of the valves, FIG. is a longitudinal sectional view through a folding knife cylinder with representation of its driving connection to the folding valve cylinder, - Figure 3 is a side elevational view.

  folding cylinder equipped with three pairs of clas-

  farts 120 degrees and the possibility of a sampling

6.- 27 I

  of products in two different locations, - Figure 4 is a view. longitudinal section according to Figure 1 with the possibility of variable product sampling, - Figure 5 is a side elevational view according to Figure 3 with possibility of taking products variable ,, - Figure 6 is a vu.e consistent in the figure with the levy produced in one location.

  In the representation of FIG. 1, the cylinder

  Folding dre I is supported with its shaft 2, of each

  that side, in a side wall 3, 4 of the folding apparatus.

  On each side of the valve cylinder 1, is

  rotating on its shaft 2, a toothed wheel 5 and 69 The wheel

  toothed 5 located on the right side is connected rigidly by

  lons with the cam plate 7 for the control of the folding valves 8 that follow ,. in the direction of rotation of the. cylinder 1.,

  exclusively for the collection of products A (f i-

  Figure 3). The toothed wheel 6 located on the left side is bolted to the cam plate 9 for the control of the folding valves 10 which. preceding in the direction of rotation of the cylinder, exclusively actuated when taking products in two

locations B and O (Figure 3), -

  the toothed wheels 5 and 6 (FIG. 1) mesh each with an intermediate toothed wheel, respectively 11 and 12, these wheels being wedged on a shaft 13 supported in

  the side walls 3 and 4 of the folding apparatus.

  the curves 14 and 15 (FIG. 3) of the cam plates 7 and 9 (FIG. 1) consist of grooves 16 and 17 in which cam follower rollers 20 are engaged.

  and 21 each rotatably supported on a lever 18, 19 connected directly

  to the respective folding valve 8 and 10 respectively.

  In Figure 1, for the sake of clarity of representation,

  the levers 18, 19 are shown in the rotated position, and the rollers 20 and 21 are shown out of engagement with

  their respective cam grooves 16 and 17.

  the intermediate wheel It is connected through

  intermediate two intermediate gear wheels 22 and 23 (Figure 1),

  with a toothed wheel 28 (FIG. 2) fixed on a shaft (24)

  extending from one side wall to the other 3, 4 of the folding apparatus, carrying the cylinder body 26 of the folding knife cylinder 27 which supports the guide elements 25, this wheel 28 being driven by a gear wheel 29 of the drive of

the folding apparatus.

  On the shaft 24 is fitted, free to rotate, the hollow shaft 30 of the cylinder body 32 of the knife cylinder 27, carrying the knife 31, the hollow shaft being supported in the side wall 3 of the device. He wears, on his end

  a toothed wheel 33 of the same size as the wheel

  28, but provided with an oblique toothing of opposite inclination (Figure 2). The two coaxial wheels 28 and 33 each mesh in the corresponding partial toothing 34 and 35 of a double toothed wheel 36 which is keyed on a pin 37 supported in the side wall 3 of the folding apparatus. This double wheel 36 is axially displaceable via a driving member 38, guided by means of a threaded shaft 41, guided in a cover 39 bolted to the side wall 3, and provided, on its front end, 40. The partial teeth 34, 35 of the double toothed wheel respectively have a toothing with that of the corresponding gear wheel 28, 33, with which it meshes. Between the

  guiding cover 39 and the hand wheel 40, is provided in

  core a threaded ring 43, provided with a hand lever 42, and serving as security against an unwanted rotation of the axis

threaded 41.

  The toothed wheel 33 is further engaged with the toothed wheel 44 for driving the valve cylinder 1, which

  is fixed on the shaft 2 (Figure 1).

  In Figure 3, the cylinder with folding valves

  ge 1 is provided with three pairs of folding valves I, II and III offset from each other by 120 degrees. Cam trays

  7 and 9 rotate in a rotational ratio of 3/2 with the cy-

  valve liner. For this, the toothed wheels that make the drive connection between the cylinder 1 and the trays to

  cam 7 and 9, are staged geometrically in their multiplier

transmission

  The cam curve 14 has two zones of action

  47, arranged at the same distance, that is to say staggered degrees and each provided with an ascending slope 45 and a downward slope 46. Similarly, the curve of 8.-

24724? 2

  cam 15 also has two actuating zones 50 and 50 '

  each having an ascending slope 48 and a slope of

  As shown in FIG. 14, the actuating zone 50 'is shifted, with respect to the arrangement of the curve 14, by an angle Co opposite to the direction of rotation of the curve 15.

  the actuating zones 50 ', in the case of a curve

  faster than the check cylinder, in accordance with the example

  chosen embodiment, are shifted in the opposite direction to the di-

  rotation rotation of the curve. On the other hand, in the case of a cam curve rotating more slowly than the cylinder, they are shifted from the angle Co in the direction of the direction of rotation.

rotation of the curve.

  The cam plates 7, 9 are adjusted in such a way that in each case (FIG. 3), in the location A, product removal is obtained from the knife cylinder 27, with simultaneously a transverse folding. of the product, by cooperation of the knife 31 with the folding valves 8, 10 of the

  1. However, these are exclusively the keys

  8 folding pets in the direction of rotation, prior

  opened the product, which are actuated, ie

  say closed. Folding valves 10 which precede in the direction

  rotation remain closed during the entire operation.

  On the other hand, for product picking in B and C, it is simply

  the. previous valve 10 rotation which is open al-

  ternatively at both locations, while the check valve

  In rotation, 8 remains closed each time (FIG. 3).

  In the first case, the cam follower 20 for actuating the next rotating valve 8 is located in

  the lower position of the actuating zone 47 of the

  be 14, and the roller 21 for actuating the previous rotating valve 10 is in the upper engagement position

  of the curve 15. On the other hand, in the second case, with

  conditions, the roller 20 is in the position of

  upper compensation 56 of the curve 14, and the roller 21 is

  In the lower position of the actuating zone 50 or in the curve 15, the two locations for taking product B, C from the valve cylinder 1 are offset from each other by the angle θ. Between the angles ci and P, taking into account the number b of the operating zones of the curve 15 for

  the control of the preceding valves in rotation 10, exists the re-

24? 7472

  9, - the following mathematical section C = -, that is to say, ok =

in Figure 3.

  FIG. 3 shows the manner in which, at the location A, the product is transmitted from the knife cylinder 27 to the pair of valves I of the folding valve cylinder 1, simultaneously with a transverse folding, while at at location B, a folded product is transmitted from the pair of folding valves II to the conveyor belt 51. The pair of folding valves III has already transmitted to the location O, a product folded to the conveyor belt 52. The pairs of flaps

  1, II and III thus permanently and alternatively

  natively each a product at location B or at the location

mentally

  In the case of batch production, according to the portions of the folding knife cylinder 27, operating as a group collecting cylinder, which are doubly loaded, all the products are delivered, either at the location B, or at the location 0,

  To transfer the levy of the product

  of high-altitude transport 51 includes a laugu head of deviation

  command 53 'and the transport band 52

  door with non-controlled deflection tab 54.

  The female athletes are coupled, in a manner not shown, for example to a device for a third folding, the assembly shown in FIGS. 2 and 3 for the valve cylinder and the folding knife cylinder has the purpose of enabling Embodiment 9 with means not described in detail, of a bending position adjustment, independently of the intended purpose of the cam plates.

  9. To do this, after loosening the threaded ring 43 to help

  of the handwheel 40, the double toothed wheel 36 is displaced axially, Due to the ratio of the pitch of the oblique teeth, symbolized by a circle, for the toothed wheels 28, 33 and for the double toothed wheel 36, the rotational position the toothed wheel 28, including the cylinder body 26 of the knife cylinder 27 carrying the sheet guide members 25, and the position of the drive connected to the toothed wheel 28, for the cam plates 7, 9 by the intermediate wheels 23, 22, 11, 12 remain unchanged, while the toothed wheel 33, including the cylinder body 32 of the knife cylinder 27,

24? 24? 2

  10.- carrying the folding knife, as well as the toothed wheel 44 for driving the valve cylinder 1, are rotated by a corresponding angle.

  A different solution could also be envisaged

  1 to 2 for driving the cam plates 7, 9, directly from the drive of the apparatus, by means of front-toothed wheels,

or bevel gears.

  Figures 4 to 6 show a variant of the solution according to the invention, which gives the possibility of variation of the two locations B and C for the removal of products, inside the folding apparatus. With respect to the solution according to FIGS. 1 to 3, the technical means are modified as follows:

  The cam plate for actuating the keys

  10 previous folding pets, consists of two bodies of curves 57, 58 which are offset axially relative to each other.

  to the other (Figure 4). One is provided with a curve 59 of which

  that second actuating zone 60 has a lower engagement recess 61 increased at the maximum of the angle α, while

  the other is equipped with a curve 62, dervant of cover-

  lateral variable of this enlarged actuation zone (

  Figure 5). The curve body 58 can be rotated

  and secured by bolted connections in the desired position

  on the curve body 57 4figure 4). On each of these two curves 59 and 62 rolls a cam follower, respectively 63 and 64. These rollers are arranged lqlu near each other, each on an axis fixed to a pivoting lever 19 for the actuation of a

  folding valve 10 previous in rotation.

  After loosening the connections by bolts, it

  is possible, by a shift in rotation of the two bodies of cour-

  be 57, 58, and so by a variation of the actuating area, to set a desired angle ce, within the <maximum (Figure 5). As a result, the reciprocal arrangement of the two locations B and C for the removal of products,

  that is, the angle / can be modified in accordance with the

  Functional level mentioned above.

  Of course, the two locations B and C for the collection of products can be modified in common, while maintaining the constant angle p. For this, just

11.- 2472472

  rotating the curve bodies 57, 58, in common, with respect to the toothed wheel 6 (Figure 4). It is the same for what

  relates to the cam plate 9 dahs Figure 1.

  FIG. 6 shows a position adjustment of the two curve bodies 57, 58 in the case of c <= 0. In this case

  product picking takes place only at the location

  B This particular case arises when the products, after completion of the transverse folding 1, must be brought

  in common at another treatment plant, or be di-

taken from the device.

  the conditions shown in Figures 1 to 6, can be transposed, in accordance with the principle of the invention, on a folding cylinder with valves equipped with another odd number of pairs of folding valves. the following table summarizes the various possible use cases: Number of: Number of zones of: Transition ratio: angle of: pairs of: actuation by: mission between pla-: offset of:

  : flaps: cam curve: water and cylinder: zones of

: s: with valves: tionnement

  * to - - - - - - - - - - - -------- to - - ------ to-- - -

:: 2: 3/2: / 2

w 1: 3

:: 4: 3/4: / 4

: 5

4 5/4 P / 4

: 5 :: 5:

:: 6: 516: p / 6 7:

6; 7/6

8: 7/8

: fr8 24724? z 12.-

Claims (3)

CLAIMS - R E V E N D I C A T I 0 N S   1.- Device for controlling the check valves   folding of a valve cylinder for a machine folding apparatus   Rotary printing machines, with an odd number of valve pairs, whose pivoting valves are actuated by cam plates, characterized in that the folding valves (8) which follow in the direction of rotation of the cylinder ( 1) are actuated only in the case of a sampling of products at a location (A), and the valves (10) which precede in the direction of rotation, are actuated only in the case of a sampling of products in two locations (B and C), each by a cam plate (7, 9) rotating in the direction of   rotation of the cylinder (1), the relative rotational speed   compared to that of the cylinder, is in a ratio of 2/3 or 4/3 for a cylinder provided with three pairs of valves (I, II, III) regularly spaced around its circumference, or a ratio of 4/5 or 6/5 for a cylinder with five pairs, or a ratio   6/7 or 8/7 for a cylinder with seven pairs of   the curves (14, 15) of the cam plates (7, 9) being provided in the same series of successions, two or four for three pairs of flaps, four or six for five pairs of flaps and six or eight for seven pairs of flaps, each curve having an upward zone (45, 48) and a downward zone (46, 49), the product transmission control curve (14) having actuating zones (47, 49). at the same spacing, whereas in the product withdrawal control curve (15), with respect to the product transmission control curve (14), each second operating zone (50) is shifted, in dependence of the number (b) of the operating zones of the curve (15) as well as of   the tab separating the two sampling locations from   (B and C), of an angle c = -> t, oriented in the direction opposite to the direction of rotation, in the case of curve (15) rotating faster than the valve cylinder (1), and in the direction of the direction of rotation, in the case of curve (15) rotating more   slowly as the valve cylinder (1).   2. Device according to claim 1, characterized   characterized in that the cam plate for actuating the clas-   pets 00) which precede in the direction of rotation, consists of two cam curve bodies (57, 58) axially offset between 2472472   13.- they, one of which is provided with a curve (59), each second operating zone (60) has a lower engagement recess (61) increased by the maximum angle, while the another cam is provided with a curve (62) for variable lateral overlapping of this operating zone 460), the two mud bodies (57, 58) being adjustable in position, and each cooperating with a follower roller (63 , 64) rolling on its curve (59, 62), these rollers being arranged close to each other, each on an axis (65) fixed on a pivoting lever (19) to actuate a   folding valve (10) preceding in the direction of rotation.   3. Device according to claim 1,   characterized in that a toothed wheel (29) connected to the drive of the folding apparatus meshing with a toothed wheel (28) fixed to a shaft (24) of a cylinder body   (26) of a folding knife cylinder (27) carrying elements   sheet guiding members (25), the latter wheel (28)   dragging the two cam plates (7, 9) for controlling the folding valves (8, 10) via a plurality of intermediate gears (23, 22, 11, 12), two of which are arranged on each side of the folding apparatus, and which are interconnected by a shaft (13), this wheel (28) meshing with a   toothed wheel (33), meshing with a toothed wheel (44) of the cylinder   fixed bending die on a hollow shaft (30) extending through the shaft (24) of the cylinder body (26) for sheet guide members (25), a cylinder body (32) of the knife cylinder (27). )   carrying the folding knife (51) gear wheel of the same size   but with an oblique toothing of opposite inclination in a double axially sliding gear wheel (36) whose   partial toothing (34, 35) is equipped with a corresponding denture   dant i the gear wheel (28, 33) meshing with it,