EP0738595A1 - Verschiebbare Verkleidung für eine Druckmaschine - Google Patents

Verschiebbare Verkleidung für eine Druckmaschine Download PDF

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Publication number
EP0738595A1
EP0738595A1 EP95106569A EP95106569A EP0738595A1 EP 0738595 A1 EP0738595 A1 EP 0738595A1 EP 95106569 A EP95106569 A EP 95106569A EP 95106569 A EP95106569 A EP 95106569A EP 0738595 A1 EP0738595 A1 EP 0738595A1
Authority
EP
European Patent Office
Prior art keywords
cover
section
conveying device
printing mechanism
printing 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.)
Granted
Application number
EP95106569A
Other languages
English (en)
French (fr)
Other versions
EP0738595B1 (de
Inventor
Mitsuji Takai
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.)
Sakurai Graphic Systems Corp
Original Assignee
Sakurai Graphic Systems Corp
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 Sakurai Graphic Systems Corp filed Critical Sakurai Graphic Systems Corp
Publication of EP0738595A1 publication Critical patent/EP0738595A1/de
Application granted granted Critical
Publication of EP0738595B1 publication Critical patent/EP0738595B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator

Definitions

  • the present invention relates to a safety cover for a silk-screen printing machine. More particularly, it pertains to a safety cover closed during machine operation and opened during aligning adjustments and maintenance work.
  • a silk-screen printing machine generally includes a sheet conveying device, a sheet delivering device, and a print frame, which are exposed from the upper side of the machine.
  • a safety cover is disposed on a machine frame to protect the operator from the movement of these devices during machine operation.
  • the safety cover is opened during alignment of printing position, setting of printing pressure, removal of jammed sheets, machine maintenance, etc.
  • hood-type covers such as those shown in Fig. 11 have been used as safety covers.
  • the hood-type cover comprises two cover bodies 54 having the same dimensions and shape.
  • the base end of each cover body 54 is pivotably supported by a damper (not shown) at the center of the upper side of a printing machine 55.
  • An open position, exposing the top portion of the printing machine 55, and a close position, covering the top portion can be selected by manually lifting or lowering the distal end of each cover body 54.
  • It is an object of the present invention is to provide a safety cover capable of being displaced to a position where the cover does not interfere with printing adjustments, maintenance work, etc.
  • Another object of the present invention is to provide a safety cover allowing easy opening and closing.
  • a printing machine is provided with a slidable first cover and second cover.
  • the printing machine has a printing mechanism located at a substantially center position on a frame, a conveying device disposed upstream of the printing mechanism and a delivering device disposed downstream of the printing mechanism.
  • the printing mechanism performs printing operation on sheets supplied to the printing mechanism by the conveying device and the delivering device delivers the printed sheets.
  • the first cover and second cover are mounted on the frame. The first cover slides between a position shielding the conveying device and a position exposing the conveying device. The second cover slides between a position shielding the delivering device and a position exposing the delivering device.
  • a printing machine comprises a printing mechanism 13, a sheet conveying device 12, and a sheet delivering device 14.
  • the printing mechanism 13 is disposed at the center of a machine frame 11 with the conveying device 12 provided at its upstream side and the delivering device 14 provided at its downstream side.
  • a sheet feeder 15 is provided at the upstream side of the conveying device 12 for feeding sheets of material such as paper.
  • the printing mechanism 13, conveying device 12, delivering device 14, and feeder 15 are driven by the drive section 21.
  • the printing mechanism 13 includes a print frame 29, a doctor 25, a squeegee 26, and a print cylinder 23.
  • the print frame 29 is slidably mounted to the top portion of the machine frame 11.
  • a silk-screen print 27 is fixed to the print frame 29.
  • the doctor 25 and the squeegee 26 are disposed, movable in the vertical direction, on the machine frame 11 above the silk-screen print 27.
  • the print cylinder 23 is pivotable and includes a gripper 24.
  • the reciprocating pivot action of the print cylinder 23 is synchronized to the reciprocating movement of the print frame 29.
  • the gripper 24 is capable of grasping printing sheet.
  • the squeegee 26 presses the silk-screen print 27 against the sheet on the rotating print cylinder 23. Printing sheets are stocked in the feeder 15.
  • the conveying device 12, disposed at the upstream side of the printing mechanism 13, includes a sheet conveying belt 22.
  • the delivering device 14, disposed at the downstream side of the printing mechanism 13, includes a sheet delivering belt 28.
  • a sheet, first stacked in a feeder 15, is supplied to the printing mechanism 13 via the conveying belt 22.
  • the print cylinder 23 is pivoted clockwise to clamp the sheet with the gripper 24. Meanwhile, ink is pushed toward the squeegee 26 by the doctor 25 on the silk-screen print 27.
  • the print cylinder 23 is immediately pivoted in the counterclockwise direction to cause the sheet to be wounded onto the cylinder 23. During the counterclockwise rotation, the sheet attached to the cylinder 23 is printed by the squeegee 26 via the silk-screen print 27.
  • the sheet is released from the gripper 24 when the gripper 24 reaches the delivering belt 28 during the counterclockwise rotation.
  • the sheet is then sucked on to the delivering belt 28 and carried downstream to be discharged out of the printing machine.
  • a first cover 16, covering the conveying device 12, and a second cover 17, covering the delivering device 14, are slidably attached to the upper side of the frame 11.
  • the first cover 16 comprises a first cover member 42 and a second cover member 41.
  • the second cover 17 is provided with a first cover section 44 and a second cover section 43.
  • the first cover 16 and the second cover 17 are located on opposite ends of the upper surface of the printing machine with the doctor 25 and the squeegee 26 in between.
  • Figure 1 shows the upper side of the conveying device 12 and the delivering device 14 completely shielded by the first cover 16 and the second cover 17, respectively.
  • the second member 41 is located on the upstream end and the first member 42 on the downstream end.
  • the first section 44 is located on the upstream end and the second section 43 on the downstream end.
  • the doctor 25 and the squeegee 26 of the printing mechanism 13, which require adjustments during machine operation, are not covered by the covers 16, 17.
  • cover 16 The structure of the covers 16, 17 will now be described.
  • the structure and functions of cover 16 are the same as cover 17. Therefore, cover 16 will mainly be explained.
  • the same members among each cover will be denoted by the same numbers in the drawings.
  • a pair of support rails 45 are fixed to each side of the upper surface of the frame 11 via brackets 46.
  • the support rails 45 extend parallel to the sheet conveying direction and are spaced apart from each other by a predetermined distance.
  • a movable main rail 47 is attached to each support rail 45 via an interposing member 48.
  • the support rail 45 and the main rail 47 have the same cross-sectional configuration.
  • Each rail 45, 47 receives the interposing member 48 via ball bearings 49. The rolling of the ball bearings 49 allows the rails 45, 47 to slide relative to one another via the interposing member 48.
  • Each main rail 47 is connected to the associated inner side of the vertical wall of the second member 41 and the second cover section 43. This structure constitutes slide mechanisms 18 and enables the second member 41 and the second section 43 to be slidable above the frame 11.
  • the second member 41 is slidable between a first operational position and a second operational position.
  • the second member 41 shields the upstream half of the conveying device 12 at the first operational position (refer to Fig. 7) and overhangs from the frame 11 (refer to Fig. 8) exposing substantially all of the conveying device 12 at the second operational position.
  • an outer edge 41a of the second member 41 will be located above the vicinity of an upstream edge 11a of the frame 11.
  • an inner edge 41b of the second member 41 will be located above the vicinity of the upstream edge 11a.
  • the second section 43 is slidable between a first active position and a second active position.
  • the second section 43 shields the downstream half of the delivering device 14 at the first active position and overhangs from the frame 11 exposing substantially all of the delivering device 14 at the second active position.
  • an outer edge 43a of the second section 43 will be located above the vicinity of a downstream edge 11b of the frame 11 .
  • an inner edge 43b of the second section 43 will be located above the vicinity of the downstream edge 11b.
  • Intermediate support rails 51 extending parallel to the main rails 47, are fixed to the outer side of the vertical walls of the second member 41 and second section 43.
  • a secondary movable rail 53 is attached to its associated support rail 51 via an interposing member 52. As shown in Fig. 6, the support rail 51 and the secondary rail 53 have the same cross-sectional configuration.
  • Each rail 51, 53 receives the interposing member 52 via ball bearings 50. The rolling of the ball bearings 50 allows the rails 51, 53 to slide relative to one another via the interposing member 52.
  • Each secondary rail 53 is connected to an inner vertical wall of the first member 42 and first section 44. This structure constitutes slide mechanisms 19 and enables the first member 42 and the first section 44 to be slidable above the frame 11.
  • the first member 42 is slidable between a first operational position and a middle operational position.
  • the first member 42 shields the downstream half of the conveying device 12 at the first operational position (refer to Fig. 5) and shields the upstream half of the conveying device 12 at the middle operational position (refer to Fig. 7).
  • an outer edge 42a of the first member 42 will be located above the vicinity of the center of the conveying device 12.
  • an inner edge 42b will be located above the vicinity of the center of the conveying device 12.
  • the first section 44 is slidable between a first active position and a second active position.
  • the first section 44 shields the upstream half of the delivering device 14 at the first active position and shields the downstream half of the delivering device 14 at the middle active position.
  • an outer edge 44a of the first section 44 will be located above the vicinity of the center of the delivering device 14 (Fig. 9).
  • an inner edge 44b will be located above the vicinity of the center of the delivering device 14.
  • Each cover member 41, 42 and each cover section 43, 44 is preferably made of a transparent acrylic resin.
  • the second member 41 and the second section 43 are substantially equal in length with the associated first member 42 and first section 44 in the longitudinal direction parallel to the sheet conveying direction.
  • the second member 41 and the second section 43 are formed slightly narrower in width and slightly smaller in height when compared to the associated first member 42 and the first section 44. Consequently, the configuration of each member and section 41, 42, 43, 44 allows the first member 42 and first section 44 to overlap and accommodate the associated second member 41 and second section 43 as shown in Fig. 7.
  • the first member 42 and the first section 44 are provided with handles 40 on their top surfaces.
  • the conveying device 12 and the delivering device 14 are completely shielded in Fig. 1. From this state, the handles 40 on the covers 16, 17 are grasped and pushed in the direction away from the printing mechanism 13 to expose each device 12, 14.
  • the first member 42 slides until it reaches the middle operational position and accommodates and overlaps the second member 41 as shown in Fig. 2.
  • the first section 44 slides until it reaches the middle active position and accommodates and overlaps the second section 43 as shown in Fig. 2.
  • the sliding action of the first member 42 and the first section 44 is enabled by the slide mechanisms 19.
  • a detected piece 36 (Fig. 5) is fixed to the outer lateral wall of the second member 42 and the second section 44.
  • An associated sensor 37 is fixed to brackets 38 secured to the frame 11 near the printing mechanism 13.
  • a safety switch 35 comprises the sensor 37 and the detecting plate 36. The detected piece 36 abuts with the sensor 37 when the associated cover 16, 17 is completely closed. This results in a signal output from the sensor 37 of the safety switch 35.
  • a start switch 33, a jog motion switch 34, and the safety switch 35 are connected to a controller 20.
  • the start switch 33 and the jog motion switch 34 are on the operation panel 30.
  • the controller 20 accepts a signal sent from the start switch 33, and moves the drive section 21 in accordance with the signal.
  • the drive section 21 then continuously drives the printing mechanism 13, conveying device 12, and delivering device 14. Therefore, the printing machine becomes operable only when the upper surface of its frame 11 is completely closed thus improving operator safety.
  • the controller 20 accepts the signal from the jog motion switch 34 and drives the printing mechanism 13, conveying device 12, and delivery device 14 in a jog motion in accordance with the signal. Jog motion operation is permitted when the covers 16, 17 are opened. This facilitates alignment, adjustments, and maintenance work on the printing machine.
  • each cover 16, 17 may be slid until a desired portion of the frame 11 is exposed. If necessary, the conveying device 12 and the delivering device 14 can completely be exposed. Therefore, the covers 16, 17 do not interfere with adjustment and maintenance work.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Screen Printers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP19950106569 1995-04-20 1995-05-02 Verschiebbare Verkleidung für eine Druckmaschine Expired - Lifetime EP0738595B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7095590A JPH08290549A (ja) 1995-04-20 1995-04-20 スライド型カバーを備えた印刷機
JP95590/95 1995-04-20

Publications (2)

Publication Number Publication Date
EP0738595A1 true EP0738595A1 (de) 1996-10-23
EP0738595B1 EP0738595B1 (de) 1998-08-12

Family

ID=14141801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950106569 Expired - Lifetime EP0738595B1 (de) 1995-04-20 1995-05-02 Verschiebbare Verkleidung für eine Druckmaschine

Country Status (3)

Country Link
EP (1) EP0738595B1 (de)
JP (1) JPH08290549A (de)
DE (1) DE69504030T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130098199A1 (en) * 2010-04-09 2013-04-25 Comexi Group Industries, S.A. Movable safety screen device applicable to a printer, and a printer with such a movable safety screen device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100462794B1 (ko) * 2002-05-15 2004-12-17 세크론 주식회사 스크린 프린터의 마스크 덮개
DE10331755C5 (de) * 2002-08-22 2011-04-14 Heidelberger Druckmaschinen Ag Schutzeinrichtung am Ausleger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048417A (en) * 1990-05-04 1991-09-17 Everroad Michael A Compact apparatus for screen preparation and printing and method of use
US5129161A (en) * 1990-02-06 1992-07-14 Precision Screen Machines, Inc. UV light shuttle cover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129161A (en) * 1990-02-06 1992-07-14 Precision Screen Machines, Inc. UV light shuttle cover
US5048417A (en) * 1990-05-04 1991-09-17 Everroad Michael A Compact apparatus for screen preparation and printing and method of use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130098199A1 (en) * 2010-04-09 2013-04-25 Comexi Group Industries, S.A. Movable safety screen device applicable to a printer, and a printer with such a movable safety screen device

Also Published As

Publication number Publication date
EP0738595B1 (de) 1998-08-12
DE69504030T2 (de) 1999-05-06
DE69504030D1 (de) 1998-09-17
JPH08290549A (ja) 1996-11-05

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