EP0128367A2 - Dispositif de tension de la chaîne sans fin d'un dispositif de sortie d'une machine à imprimer - Google Patents

Dispositif de tension de la chaîne sans fin d'un dispositif de sortie d'une machine à imprimer Download PDF

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Publication number
EP0128367A2
EP0128367A2 EP19840105311 EP84105311A EP0128367A2 EP 0128367 A2 EP0128367 A2 EP 0128367A2 EP 19840105311 EP19840105311 EP 19840105311 EP 84105311 A EP84105311 A EP 84105311A EP 0128367 A2 EP0128367 A2 EP 0128367A2
Authority
EP
European Patent Office
Prior art keywords
chain
bearing
tensioning
boxes
side walls
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.)
Withdrawn
Application number
EP19840105311
Other languages
German (de)
English (en)
Inventor
Gerhard Pollich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0128367A2 publication Critical patent/EP0128367A2/fr
Withdrawn legal-status Critical Current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
    • B65H29/041—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 and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/34—Gripper bars bridging at least two chains running synchronously and parallely
    • B65H2404/341—Details of driving or return drum
    • 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
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a device for retensioning an endless boom chain on the boom of a printing press, with chain wheel bearings pressurized and displaceable in the side walls of the printing machine in the chain tensioning direction, and in these axle-mounted chain wheels.
  • the sheets are delivered continuously.
  • the goods carriers rotating at the same speed e.g. Conveyor chains serve to convey the material to be conveyed, e.g. to convey printed sheets from the loading point to an unloading point.
  • the conveying process depends on the conveying speed.
  • the performance of the conveyor is determined by the delivery rate in the unit of time.
  • the smooth running of the conveyor chain drive is essential. It depends on an appropriate arrangement, careful assembly, correct lubrication and the adjustment of the chain tension.
  • the distance between the axes changes periodically when the drive runs.
  • numerous auxiliary devices such as support wheels or tensioning wheels or tensioning screws are used on the empty strand.
  • they should also take up the support layer, especially with larger center distances, avoid chain vibrations and a certain adjustability, among other things. ensure after wear.
  • the shaft and sprockets must run parallel to the axis and without any shocks, and the chains must not be too tight.
  • the correct chain tension is very important for the safety and service life of the chains and chain guides as well as for reducing the chain noise. Retensioning the gripper chains in the delivery arm in printing machines can only be carried out by a technician with a great deal of time in the present embodiments of the tensioning devices. By disassembling the chain guides, the chain tension can then e.g. can be measured with a spring balance.
  • the task arises to develop a device with which a chain elongation of a delivery chain of a printing machine that occurs during operation can be compensated in a simple manner in order to ensure safety, smooth running and service life of the drive, and with which the chain tension required for trouble-free chain running Not only can it be maintained constantly, but it can also be easily checked by the operator of the printing press, re-tensioned as quickly as possible and adjusted to a precisely defined tension value without the use of additional aids.
  • the object is achieved in that the chain wheel bearings are elastically pressurized, can be locked in their respective positions and can be automatically pushed in the non-locked state depending on increasing chain elongation.
  • Such an arrangement enables the operator of the printing press to closely monitor compliance with the desired chain tensioning force and, if necessary, to readjust it in the shortest possible time, setting errors being virtually eliminated by the simple handling without the use of any measuring devices.
  • an advantageous embodiment of the invention provides a chain tensioning element with a constant pressure generating force with an elastic pressure compensation memory for the continuous pressure application of each chain wheel bearing , by means of which a defined chain tensioning force can be set and adjusted.
  • the bearing box can be automatically pushed by the pressure compensation store when the chain is elongated, and the distance between the bearing box and the housing-fixed stop can thereby be changed, the actuator with its end face being twisted in register with an alignment edge to keep the pressure force of the pressure compensation store constant in order to generate a defined chain tension of the support element can be brought.
  • the pressure compensation accumulator is designed as a disc spring column with an adjustable total spring travel.
  • the individual plate springs of the plate spring column are spread by pushing the bearing boxes forward, thereby increasing their total spring travel. This can be set back to its original value by means of the adjustable control element, whereby - changes in the force characteristic of the disc spring column are neglected - their total spring force remains constant.
  • both sprockets are preferably mounted on a continuous axis.
  • the storage boxes are provided with locking screws to be loosened before the automatic pushing in by the tensioning element.
  • each sprocket is mounted separately on a short bearing pin.
  • the storage boxes are arranged with a play-free guide in the side walls. The precise - also lateral - guidance of the bearing boxes in the side walls counteracts tipping of the chain wheels arranged on the short bearing pins, particularly with high chain tensile force or chain tension, and thereby achieves the advantage that chain elongation is automatically taken sufficiently into account during chain running, to guarantee a safe and quiet operation.
  • the side walls 10 of a printing press are provided with elongate cutouts 9.
  • Slidable sprocket bearings which are designed as bearing boxes 7, are arranged in the cutouts 9.
  • Each storage box 7 has a longitudinal slot 16 in the direction of displacement, through which locking screws 11 projecting into the side wall 10, by means of which each storage box 7 can be locked on its side wall 10.
  • Short support elements 13 are fastened in bearing bores 17 of the bearing boxes 7, on which a chain wheel 2 is rotatably mounted in front of each side wall 10.
  • Endless cantilever chains 1 run on the chain wheels 2.
  • Transversely to the sheet conveying direction according to arrow 3 continuous gripper support strips 4 with grippers 5 for gripping and transporting sheets 18 are fastened to the delivery chains 1, rotating with them.
  • a tensioning element 8 is provided between the bearing box 7 and an end face of the recess 9 serving as a fixed stop 19 for the elastic pressurization of the bearing box.
  • the clamping element 8 consists of an adjustable adjusting part 12, an elastic pressure compensation accumulator 14 arranged therein, and a the pressure compensation memory 14 downstream support element 13.
  • the adjusting part 12 is provided with an adjusting screw 21 which engages in an internal thread 20 leading to the bearing bore 17.
  • the elastic pressure compensation accumulator is designed as a plate spring column 14, consisting of plate springs arranged in alternating rows.
  • the plate spring column 14 is prestressed in the normal position in the initial state of the tensioning element 8 and is supported on the end face of the downstream support element 13. This in turn rests on the stop 19 fixed to the housing and is provided with an alignment edge 22 which interacts with the end face 24 of the adjusting part 12.
  • the adjustable adjusting part 12 engages in a recess 25 in the bearing box 7.
  • This position takes the tensioning element 8 as a starting position in a new boom chain 1.
  • the chain tension in the cantilever chains 1 decreases due to chain elongation. If a certain chain elongation is exceeded, safety, smooth running and service life of the chain drive are no longer fully guaranteed, which is why the cantilever chains have to be retensioned.
  • the storage boxes 7 are unlocked by loosening the locking screws 11 from the side walls 10. Due to the pre-tensioning of the plate spring column 14, the two storage boxes 7 are then automatically shifted in their recesses 9 with the total spring force in the chain tensioning direction.
  • the individual plate springs relax, the total spring travel increases, whereby the total spring force decreases. With increasing chain elongation, the chain tension is also reduced.
  • the adjustable actuating part 12 must be brought back into its defined starting position, which it has assumed before the disc spring column 14 is relaxed and the storage box 7 is pushed forward. This is done by turning the adjusting part 12 in the direction against the stop 19 fixed to the housing until the end face 24 of the adjusting part 12 has been brought into alignment with the aligning edge 22 of the support element 13. During this alignment, the adjusting screw 21 located on the adjusting part 12 unscrews from the internal thread 20 of the bearing box 7, thereby pushing the bearing box 7 forward in the chain tensioning direction and thereby increasing the chain tensioning force. Thus, the disc spring column 14 is biased again.
  • the flush closure of the end face 24 of the adjusting part 12 with the alignment edge 22 of the support element 13 is the proof of a chain tension that is always precisely defined.
  • the storage boxes 7 are locked again on the side walls 10 by means of the locking screws 11.
  • the tensioning of the delivery chains 1 can take place in the operating state of the printing press during the chain run; however, it is preferred to stop the printing press briefly.
  • the bearing box 7 After repeated tensioning of the cantilever chain 1, the bearing box 7 is pushed as far in the chain tensioning direction, and the actuating part 12 is rotated so often against the stop 19 fixed to the housing that the latter has left the recess 25 and the adjusting screw 21 only briefly engages in the internal thread 20 of the bearing box 7 .
  • the tensioning element 8 is now in its end position and can no longer be readjusted, so that it is now necessary to replace the jib chain 1 (FIG. 4).
  • the second exemplary embodiment shown in FIGS. 2 and 5 differs from the previously described first exemplary embodiment in that both sprockets 2 are jointly fastened on a sprocket shaft 15 which is continuous over the entire machine width and is rotatably mounted in the bearing bores 17 of the bearing boxes 7.
  • the storage boxes 7 are provided with a play-free guide 26 for displacement in the recesses 9. This makes locking and unlocking the storage boxes 7 superfluous, and the set screws 11 used in the first embodiment can be omitted.
  • the storage boxes 7 of the third exemplary embodiment according to FIG. 6 are also equipped with this play-free guide 26.
  • the bearing boxes 7 are formed in two parts, a precise, adapted to the width of the recess 9 bearing shell 27 with a support collar resting on the outer side wall 10 ensures a relatively play-free displacement in the chain tensioning direction, and one on the inner side wall 10 by means of clamping screws 29 with the bearing shell 27 screwed bearing cover 28 in conjunction with the aforementioned support collar ensures the lateral play-free guidance of the storage boxes 7.
  • the short support elements 13 are fixed in the bearing bores 17 of the bearing boxes 7 by tapered pins 30 and the bevel gears 2 are rotatably arranged on the support elements 13 by means of ball bearings 31.
  • securing rings 32 and a supporting ring 33 which is supported on the ball bearing 31 and is screwed onto the front of the sprocket 2, are provided on both sides of the ball bearing 31.
  • the backlash-free guide 26 of the second and third exemplary embodiments permits automatic compensation of the chain elongation during chain running, since the bearing boxes 7 continuously push themselves in the chain tensioning direction due to the pressurization of the tensioning elements 8. It is neither necessary to switch off the printing press nor to loosen the locking screws.
  • the play-free guide 26 of the storage boxes 7 is not only limited to the arrangement of a continuous sprocket shaft 15 (FIG. 2), but also possible when using two separate short support elements 13 (FIG. 6), in particular when using the latter through the play-free side Guide 26 of the storage boxes 7 on the side walls 10 prevents the support elements 13 from tipping inwards - caused by the chain tensile force.
  • the invention is not only limited to the three embodiments set out in the description and shown in the figures, but instead numerous constructive modifications and developments are also within the scope of the invention.
  • the pressure compensation accumulator 14 instead of being resiliently pneumatic or hydraulic, in which case it makes sense to fully automate not only the displacement of the storage boxes 7 but also the setting of a defined chain tensioning force by constant pressure generation and monitoring. It is also conceivable to directly monitor the chain tensioning force by means of electronic measurement recording on the cantilever chains and, for example, to adjust it by means of an electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Drives For Endless Conveyors (AREA)
EP19840105311 1983-06-09 1984-05-10 Dispositif de tension de la chaîne sans fin d'un dispositif de sortie d'une machine à imprimer Withdrawn EP0128367A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3320865 1983-06-09
DE3320865 1983-06-09
DE3407536 1984-03-01
DE19843407536 DE3407536A1 (de) 1983-06-09 1984-03-01 Vorrichtung zum nachspannen einer endlosen auslegerkette am ausleger einer druckmaschine

Publications (1)

Publication Number Publication Date
EP0128367A2 true EP0128367A2 (fr) 1984-12-19

Family

ID=25811379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840105311 Withdrawn EP0128367A2 (fr) 1983-06-09 1984-05-10 Dispositif de tension de la chaîne sans fin d'un dispositif de sortie d'une machine à imprimer

Country Status (5)

Country Link
EP (1) EP0128367A2 (fr)
AU (1) AU2917684A (fr)
DE (1) DE3407536A1 (fr)
ES (1) ES533218A0 (fr)
GB (1) GB2142599A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213801A (en) * 1987-12-21 1989-08-23 Data Motion Inc Tractor with belt tensioning mechanism
EP0429743A3 (en) * 1989-11-28 1991-08-21 Miller-Johannisberg Druckmaschinen Gmbh. Sheet delivering device
CN107685977A (zh) * 2017-08-14 2018-02-13 上海瑞源印刷设备有限公司 印铁机片材预热装置的链条涨紧机构
CN114030810A (zh) * 2021-10-15 2022-02-11 红云红河烟草(集团)有限责任公司 一种辊筒输送机传动链张紧装置
WO2022188924A1 (fr) * 2021-03-08 2022-09-15 Dürr Systems Ag Installation de traitement et procédé de traitement de pièces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116022516B (zh) * 2023-03-30 2023-06-30 山西和信基业科技股份有限公司 煤矿井下刮板机链条自动张紧装置
CN117509024A (zh) * 2023-11-07 2024-02-06 东风柳州汽车有限公司 一种涂装车间的输送机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB324793A (en) * 1929-01-18 1930-02-06 Renold Hans Ltd Improvements relating to chain tensioning devices
GB424504A (en) * 1933-09-06 1935-02-22 Gardiner S Conveyors Ltd Improvements in or relating to endless conveyors
GB799235A (en) * 1956-04-16 1958-08-06 Bobst Fils Sa J Improvements in or relating to presses for cutting out or embossing material in the form of sheets
CH441835A (de) * 1965-05-04 1967-08-15 Kassenfabrik Emil Mogler Schubladenkassette
JPS5426622Y2 (fr) * 1974-10-26 1979-09-01

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213801A (en) * 1987-12-21 1989-08-23 Data Motion Inc Tractor with belt tensioning mechanism
GB2213801B (en) * 1987-12-21 1991-11-27 Data Motion Inc Tractor with belt tensioning mechanism
EP0429743A3 (en) * 1989-11-28 1991-08-21 Miller-Johannisberg Druckmaschinen Gmbh. Sheet delivering device
CN107685977A (zh) * 2017-08-14 2018-02-13 上海瑞源印刷设备有限公司 印铁机片材预热装置的链条涨紧机构
CN107685977B (zh) * 2017-08-14 2024-05-24 上海瑞源印刷设备有限公司 印铁机片材预热装置的链条涨紧机构
WO2022188924A1 (fr) * 2021-03-08 2022-09-15 Dürr Systems Ag Installation de traitement et procédé de traitement de pièces
DE102021202216A1 (de) 2021-03-08 2022-09-22 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
EP4304960A1 (fr) * 2021-03-08 2024-01-17 Dürr Systems AG Installation de traitement et procédé de traitement de pièces
CN114030810A (zh) * 2021-10-15 2022-02-11 红云红河烟草(集团)有限责任公司 一种辊筒输送机传动链张紧装置
CN114030810B (zh) * 2021-10-15 2023-08-11 红云红河烟草(集团)有限责任公司 一种辊筒输送机传动链张紧装置

Also Published As

Publication number Publication date
DE3407536A1 (de) 1984-12-13
GB8414654D0 (en) 1984-07-11
ES8502643A1 (es) 1985-02-01
ES533218A0 (es) 1985-02-01
AU2917684A (en) 1984-12-13
GB2142599A (en) 1985-01-23

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: POLLICH, GERHARD