US3405937A - Machine for processing sheets - Google Patents

Machine for processing sheets Download PDF

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Publication number
US3405937A
US3405937A US646088A US64608867A US3405937A US 3405937 A US3405937 A US 3405937A US 646088 A US646088 A US 646088A US 64608867 A US64608867 A US 64608867A US 3405937 A US3405937 A US 3405937A
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United States
Prior art keywords
cam
lever
balance
chains
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US646088A
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English (en)
Inventor
Schoch Gregor
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Individual
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Individual
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Publication of US3405937A publication Critical patent/US3405937A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices
    • B65H29/044—Intermediate conveyors, e.g. transferring devices conveying through a machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/085—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers by combinations of endless conveyors and grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/42—Die-cutting

Definitions

  • ABSTRACT or THE DISCLOSURE A machine in which gripping bars are advanced by a chain to engage sheets in a first position and advance the sheets to an operating position in a press, the chains and bars being periodically immobilized in the engaging and operating positions, there being provided a mechanism constituted by a cam operating a stem which in turn operates a balance member coupled to a lever mounted on a drive shaft for the chain wheels, to lock the drive shaft when the bars are in the aforesaid positions and thereafter to pivotally move the balance member, lever and drive shaft as a unit about the axis of the drive shaft such that the latter turns through a small angle and advances the gripper bars a small distance in their direction of advance after they have been immobilized.
  • the invention is directed to a machine for processing sheets, and in particular to a press which rule bleeds or stamps cardboard sheets which are transported one by one by gripping bars advanced by two endless chains which are alternatively driven and immobilized.
  • a mechanism for acting on the drive shaft of the wheels which drive the chains, to lock the wheels When the stop during stoppage of the bars, after which the drive shaft is advanced slightly to advance the bars, the mechanism being characterized by the provision of a single cam with four distinct surfaces which acts on a stem which controls pivotal movement of a balance member pivoted to a lever which is supported on the driving shaft and which serves to lock and advance the drive shaft, the lever being independently acted on by an elastic means which urges the lever to an adjustable rest position.
  • FIGURE 1 is a diagrammatic side view of the general arrangement of a press
  • FIGURES 2 and 3 are sectional views through the press showing in different positions a known arrangement for driving the chain wheels;
  • FIGURE 4 is a side view of the arrangement shown in FIGS. 2 and 3;
  • FIGURE 5 shows a known modification for the ar- 3,405,937. Patented Oct. 15, 1968 rangement of FIGS. 24 for supplemental displacement of the chains;
  • FIGURE 6 is a diagrammatic Side view of a mechanism according to the invention for obtaining supplemental displacement of the chains, the illustrated position showing locking of the drive shaft.
  • FIGURES 7 and 8 show a detail of the mechanism of FIG. 6 in different positions, FIG. 7 showing released position of the drive, FIG. 7 showing released position of the drive shaft, and FIG. 8 showing the position after supplemental displacement of the drive shaft;
  • FIGURE 9 is a view on enlarged scale showing the surface of the cam controlling the operation of the mechanism.
  • FIG. 1 there is shown a press, in side view, with framework 1, a lower platen 2 which moves up and down, chains 3 engaging gripping bars, and front chain wheels 4 and back chain wheels 5.
  • FIGS. 2 to 4 The mechanism shown in FIGS. 2 to 4 has already been developed in order to impart to the front chain wheels 4 rapid rotations of exactly one turn. A knowedge of this mechanism is essential since it plays an important part in the present invention.
  • FIG. 2 shows a wheel 4 rigidly secured on an axle 6 which passes through a wall 7 of the press and fixedly supports a grooved cylinder 8 on which a sleeve 9 is axially slidable.
  • grippers 10 on the sleeve mesh with grippers 11 of a pinion 12, to which a cogged segment 13 transmits a rotary motion alternately in one direction and in the opposite direction (see FIG. 4).
  • the arrangement is such that the sleeve 9 meshes with pinion 12 when the latter turns in the direction corresponding to that of the displacement of the chains.
  • the sizes of .the pinion 12, segment 13, and a driving connecting rod 14 and crankshaft 15 are such that the wheels 4 perform one turn for each stroke of segment 13.
  • the displacement of the sleeve 9 is efliected by a lateral cam 17 integral with crankshaft 15 and governing the rotation of a fork 18.
  • stops 19 and 20 are raised slightly ahead of the bars in positions A and B, it will be suiiicient to transmit to the chains 3 an additional feed to bring the bars into contact with these stops in order to fix very accurately the position thereof. This is made possible by transmitting to the wheels 4 a supplemental rotatory motion after each turn thereof.
  • the rotational direction of disk 21 is the same as that for the feed of the chains, i.e., in the direction of arrow 23, whereby displacement of connecting rod 22 downwardly will make it possible, each time the sleeve 9 is engaged with grippers 16', during immobilization of the chain, to transmit to the wheels an additional feed.
  • Another means for obtaining the aforesaid additional feed has already been proposed, which consists in making the driving member of the chains integral with a cam, in a notch of which a roller is periodically pressed, thus fixing the standstill position of this member and receiving, upon each working cycle, a motion suitable to transmit to the driving member of the chains an angular shifting of predetermined amount in the conveying direction of the chains.
  • the present invention refers to a machine making use of such an arrangement. It provides a lever concentric with the driving member of the chains and elastically maintained at rest against a stop opposing its rotation in a direction opposite that of the said driving member, said lever bearing a knuckle pivot of a balance whose arms extend on either side of the articulation and partly surround the driving member, the arm opposite the stop bearing a locking member and the opposite arm being pulled by a traction stem controlled such that during each working cycle it keeps the balance in position away from the locking notch of the cam, after which it then brings about the application of the locking member into the notch of the cam, exerting thereupon an additional pull causing the balance locked with the cam and the lever supporting it, to oscillate together coaxially with respect to the driving member to transmit thereto an additional feeding motion, whereupon the lever momentarily leaves its rest against the stop, whereafter, the traction of the bar ceases and the aforesaid members return to their starting positions and the described operative cycle starts again.
  • FIGS. 6-9 there is shown at 26 the drive shaft of the driving member of the chains, namely the wheels 27 driving the conveying chains 28.
  • the wheels 27 are rigid with a cam 29.
  • the shaft 26 corresponds to the shaft 6 of the machine of FIGS. 2 to 5, driven by the segment 13 already described hereinabove.
  • the cam 29 constitutes one of the two members ensuring the immobilization of the chain wheels 27, when a conveying gripping bar occupies a station where it seizes a fed sheet, while another bar holds another sheet in working position.
  • the other member of immobilization is a locking roller 30 which a balance or two armed lever 31 periodically drives into a notch 32 of cam 29.
  • This function is governed by the cam 33, acting on the balance 31 through lever 34, pivoted at 35 and a traction stem 36, articulated at the balance end opposite the roller 30.
  • the stem 36 undergoes the action of drawback spring 37 ensuring the engagement of the roller 38 of lever 34 against the cam 33.
  • the balance 31 is pivoted at 39 on a lever 40 adapted to oscillate concentrically on the shaft 26, but normally resting against a stop assembly constituted by a fixed part 41 and a regulating screw 41', under the infiuence of a backward spring 43.
  • the locking roller 30 is at the end of the balance ar-m opposite the stop 41 of lever 40.
  • pivot 39 constitutes a fixed point around which the balance 31 can oscillate between two defined positions.
  • the balance 31 keeps the roller 30 outside the trajectory of the cam 29 and permits the free rotation thereof.
  • the transport of the gripping bars from one station to the other takes place through rotation of one turn of the chain wheels 27.
  • This position is reached when the roller 38 of lever 34 is at rest on the portion 44 of smallest radius on the cam 33.
  • the second position corresponding to FIG. 6 is that of immobilization and locking of the cam 29 and, thereby, of the shaft 26, by engagement of the roller 30 in the notch 32 of the cam 29.
  • This position is reached by exerting a pull on the stem 36, against the action of spring 37, which causes the balance 31 to pivot around its pivot 39, always considered as fixed point.
  • This motion arises due to the fact that the roller 38 of lever 34 is pushed back by the ramp 45 of the cam 33 turning in the direction of the arrow 46 (see also the partial detail of the section of the cam in FIG. 9).
  • the position represented does not correspond, however, to the maximum radius of the cam, rather the position is that at intermediary point 48 at which the cam 29 is locked by means of the pressure roller 30.
  • the section of the cam 33 shown to a larger scale in FIG. 9 allows seeing in detail what happens during the locking and thereafter.
  • the cam undergoes a uniform rotatory motion of one turn per working cycle, corresponding to successive intermittent rotations of one turn per working cycle of the shaft 26.
  • the cam 33 continues turning during stoppage of shaft 26.
  • the roller 38 of lever 34 reaches a new ramp, very smooth, designated by numeral 49, and located between the top 48 of the ramp 45 and the maximum radius 47 of the cam.
  • This new ramp 49 gives rise to a new pull, of very weak amplitude, on the stem 36 and thereby on the balance 31.
  • the mechanism is in the position of FIG. 6, wherein the roller 30 is engaged in the notch 32 in the cam 29 and the balance 31 can no longer turn around its pivot 39.
  • the balance 31 tends to turn around the pressure roller 30 as an instantaneous rotation center in the direction of the arrow 50, which rotation would be possible if the pivot 39 did not connect the balance 31 to the axle 26 (represented here by a point) through lever 40.
  • This connection now causes the three centers 26, 30 and 39 to form a set resistant triangle and it is consequently necessary to consider the balance 31 as rigidly connected to lever 40.
  • the shaft 26 will therefore perform a slight rotation in the direction of the arrow 51 which is its normal rotational direction during each working cycle, and the described mechanism will thus have effected an additional feed of the shaft of the chain wheels, between the locking position of FIG. 6 and the position just described of FIG. 8.
  • Cam 33 is given a symmetrical form in relation to the diameter x-y (see FIG. 6), so that after locking (FIG. 6) and additional feed of the cam 29 (FIG. 8), a return to the locking position (FIG. 6) takes place, followed by the release of the cam (FIG. 7).
  • the present invention offers the advantage of the use of a sole control cam 33 operating positively on a single traction stem 36, whereas previously two cams and two stems were necessary, one controlling a part serving as lever 40 and the other of the balance 31.
  • the arrangement according to the present invention can work only under certain shaping conditions of its constituent parts. These conditions are, that the balance must surround the shaft 26 driven in such a way that the centers of that shaft, the locking roller 30 and the articulation 52 of the stem 36 at the opposite end of the balance are approximately on a common diameter, which requires that balance 31 extends substantially over an arc of 180, the pull of the stem 36 being so as to be inclined with such diameter. A perpendicular position of the stem would be the most efficient, requiring the least force.
  • said means acting on the stem comprises a second cam including a first portion having an arc of small radius and corresponding to the position of separation of the locking member from the notch of the first said cam, a second portion extending continuously from the first portion and increasing in radius to define a ramp which produces displacement of the stem which controls engagement of the locking member in the notch of said first cam, and a third portion of increasing radius at a lesser rate than that of the second portion defining a second ramp of lesser slope than that of the first ramp for producing displacement of the stem to produce said further displacement thereof which causes the additional feeding motion of the drive shaft, and a fourth portion of maximum radius of the cam extending from the second ramp.
  • said means acting on the stem comprises a pivoted lever coupled to said stem and a roller on said lever in contact with the second cam.
  • a machine as claimed in claim 2 wherein said arms of the balance member extend around the axis of the drive shaft over an arc of about 6.
  • said means elastically acting on the lever comprises a stop member and a spring acting on the lever to urge the same against the stop member.
  • said means elastically acting on the lever further comprises means supporting the stop member for adjustment of its position whereby to enable adjustment of the rest position of the lever.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Discharge By Other Means (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)
  • Control Of Cutting Processes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US646088A 1966-06-21 1967-06-14 Machine for processing sheets Expired - Lifetime US3405937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH907566A CH438909A (fr) 1966-06-21 1966-06-21 Machine travaillant des feuilles

Publications (1)

Publication Number Publication Date
US3405937A true US3405937A (en) 1968-10-15

Family

ID=4348063

Family Applications (1)

Application Number Title Priority Date Filing Date
US646088A Expired - Lifetime US3405937A (en) 1966-06-21 1967-06-14 Machine for processing sheets

Country Status (9)

Country Link
US (1) US3405937A (es)
JP (1) JPS4835581B1 (es)
BE (1) BE699731A (es)
CH (1) CH438909A (es)
DE (1) DE1561132B1 (es)
ES (1) ES342097A1 (es)
FR (1) FR1524554A (es)
GB (1) GB1170667A (es)
SE (1) SE305117B (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871292A (en) * 1972-03-07 1975-03-18 Bobst Fils Sa J Platen press structure
US4015844A (en) * 1975-05-07 1977-04-05 J. Bobst & Fils, S.A. Sheet conveying device for a platen press
US5566614A (en) * 1993-10-15 1996-10-22 Heidelberger Druckmaschinen Ag Adjusting device for a gripper opening cam in a chain delivery of a sheet-fed printing press
CN109895171A (zh) * 2019-04-11 2019-06-18 浙江欧利特科技股份有限公司 切纸机的压纸器回位机构
US10753434B2 (en) * 2016-03-09 2020-08-25 Bobst Mex Sa Chain tensioner, machine for processing elements in the form of sheets and method for tensioning the chain sets

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5322581U (es) * 1976-08-04 1978-02-25
DE102019130862B3 (de) 2019-11-15 2021-02-18 Koenig & Bauer Ag Bogenbearbeitungsmaschine und Verfahren zum Antreiben zumindest eines Werkzeugs einer Bogenbearbeitungsmaschine
DE102019130863B3 (de) * 2019-11-15 2021-02-18 Koenig & Bauer Ag Bogenbearbeitungsmaschine
DE102019131800B3 (de) 2019-11-25 2021-04-08 Koenig & Bauer Ag Stanzmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385581A (en) * 1941-04-26 1945-09-25 Bobst Fils Sa J Machine for the working of blanks
US2587959A (en) * 1949-06-04 1952-03-04 Biner Siegrist Machinery Mfg C Nonjamming conveyer means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385581A (en) * 1941-04-26 1945-09-25 Bobst Fils Sa J Machine for the working of blanks
US2587959A (en) * 1949-06-04 1952-03-04 Biner Siegrist Machinery Mfg C Nonjamming conveyer means

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871292A (en) * 1972-03-07 1975-03-18 Bobst Fils Sa J Platen press structure
US4015844A (en) * 1975-05-07 1977-04-05 J. Bobst & Fils, S.A. Sheet conveying device for a platen press
US5566614A (en) * 1993-10-15 1996-10-22 Heidelberger Druckmaschinen Ag Adjusting device for a gripper opening cam in a chain delivery of a sheet-fed printing press
US10753434B2 (en) * 2016-03-09 2020-08-25 Bobst Mex Sa Chain tensioner, machine for processing elements in the form of sheets and method for tensioning the chain sets
CN109895171A (zh) * 2019-04-11 2019-06-18 浙江欧利特科技股份有限公司 切纸机的压纸器回位机构
CN109895171B (zh) * 2019-04-11 2024-01-09 国望科技(浙江)有限公司 切纸机的压纸器回位机构

Also Published As

Publication number Publication date
FR1524554A (fr) 1968-05-10
BE699731A (es) 1967-11-16
CH438909A (fr) 1967-06-30
JPS4835581B1 (es) 1973-10-29
GB1170667A (en) 1969-11-12
DE1561132B1 (de) 1970-08-27
SE305117B (es) 1968-10-14
ES342097A1 (es) 1968-07-16

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