EP0738595A1 - Sliding cover for printing machine - Google Patents
Sliding cover for printing machine Download PDFInfo
- 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
Links
- 238000007639 printing Methods 0.000 title claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 238000012423 maintenance Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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)
Abstract
Description
- 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. Conventionally, 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 eachcover body 54 is pivotably supported by a damper (not shown) at the center of the upper side of aprinting machine 55. An open position, exposing the top portion of theprinting machine 55, and a close position, covering the top portion, can be selected by manually lifting or lowering the distal end of eachcover body 54. - However, conventional hood-type covers, such as those just described, interfere with printing adjustments and maintenance work conducted near where the covers are hinged. In addition, the weight of the covers themselves makes the manual opening and closing of the covers burdensome.
- 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.
- To achieve the above objects, 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.
- The features of the present invention that are believed to be novel are set forth with particularity in the appended claims. The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiment together with the accompanying drawings in which:
- Fig. 1 is a perspective view showing covers of a printing machine in a completely closed state according to an embodiment of the present invention;
- Fig. 2 is a perspective view showing the covers in a half opened state;
- Fig. 3 is a perspective view showing the covers in a completely opened state;
- Fig. 4 is a cross-sectional view showing a slide mechanism of the cover shown in Fig. 1;
- Fig. 5 is a side view of Fig. 4;
- Fig. 6 is an enlarged partial view taken on line VI-VI of Fig. 4;
- Fig. 7 is a partial side view of Fig. 2;
- Fig. 8 is a partial side view of Fig. 3;
- Fig. 9 is a diagrammatic side elevation view showing the main devices of the printing machine;
- Fig. 10 is a block diagram showing a controller of a printing machine; and
- Fig. 11 is a perspective view showing conventional covers.
- Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
- As shown in Fig. 9, a printing machine comprises a
printing mechanism 13, asheet conveying device 12, and asheet delivering device 14. Theprinting mechanism 13 is disposed at the center of amachine frame 11 with theconveying device 12 provided at its upstream side and the deliveringdevice 14 provided at its downstream side. Asheet feeder 15 is provided at the upstream side of theconveying device 12 for feeding sheets of material such as paper. Theprinting mechanism 13,conveying device 12, deliveringdevice 14, andfeeder 15 are driven by thedrive section 21. - The
printing mechanism 13 includes aprint frame 29, adoctor 25, asqueegee 26, and aprint cylinder 23. Theprint frame 29 is slidably mounted to the top portion of themachine frame 11. A silk-screen print 27 is fixed to theprint frame 29. Thedoctor 25 and thesqueegee 26 are disposed, movable in the vertical direction, on themachine frame 11 above the silk-screen print 27. Theprint cylinder 23 is pivotable and includes agripper 24. The reciprocating pivot action of theprint cylinder 23 is synchronized to the reciprocating movement of theprint frame 29. Thegripper 24 is capable of grasping printing sheet. Thesqueegee 26 presses the silk-screen print 27 against the sheet on the rotatingprint cylinder 23. Printing sheets are stocked in thefeeder 15. - The
conveying device 12, disposed at the upstream side of theprinting mechanism 13, includes asheet conveying belt 22. Theconveying belt 22, synchronized with the rotation of theprint cylinder 23, feeds the sheet supplied by thefeeder 15 to theprinting mechanism 13. The deliveringdevice 14, disposed at the downstream side of theprinting mechanism 13, includes asheet delivering belt 28. The deliveringbelt 28, synchronized with the rotation of theprint cylinder 23, discharges the sheet printed in theprinting mechanism 13 out of the printing machine. - A sheet, first stacked in a
feeder 15, is supplied to theprinting mechanism 13 via theconveying belt 22. In theprinting mechanism 13, theprint cylinder 23 is pivoted clockwise to clamp the sheet with thegripper 24. Meanwhile, ink is pushed toward thesqueegee 26 by thedoctor 25 on the silk-screen print 27. After the sheet is clamped by thegripper 24, theprint cylinder 23 is immediately pivoted in the counterclockwise direction to cause the sheet to be wounded onto thecylinder 23. During the counterclockwise rotation, the sheet attached to thecylinder 23 is printed by thesqueegee 26 via the silk-screen print 27. - The sheet is released from the
gripper 24 when thegripper 24 reaches the deliveringbelt 28 during the counterclockwise rotation. The sheet is then sucked on to the deliveringbelt 28 and carried downstream to be discharged out of the printing machine. - A
first cover 16, covering theconveying device 12, and asecond cover 17, covering the deliveringdevice 14, are slidably attached to the upper side of theframe 11. Thefirst cover 16 comprises afirst cover member 42 and asecond cover member 41. Thesecond cover 17 is provided with afirst cover section 44 and asecond cover section 43. Thefirst cover 16 and thesecond cover 17 are located on opposite ends of the upper surface of the printing machine with thedoctor 25 and thesqueegee 26 in between. Figure 1 shows the upper side of theconveying device 12 and the deliveringdevice 14 completely shielded by thefirst cover 16 and thesecond cover 17, respectively. In thefirst cover 16, thesecond member 41 is located on the upstream end and thefirst member 42 on the downstream end. In thesecond cover 17, thefirst section 44 is located on the upstream end and thesecond section 43 on the downstream end. Thedoctor 25 and thesqueegee 26 of theprinting mechanism 13, which require adjustments during machine operation, are not covered by thecovers - The structure of the
covers cover 16 are the same ascover 17. Therefore, cover 16 will mainly be explained. The same members among each cover will be denoted by the same numbers in the drawings. - As shown in Figs. 4-8, a pair of support rails 45 are fixed to each side of the upper surface of the
frame 11 viabrackets 46. The support rails 45 extend parallel to the sheet conveying direction and are spaced apart from each other by a predetermined distance. A movablemain rail 47 is attached to eachsupport rail 45 via an interposingmember 48. As shown in Fig. 6, thesupport rail 45 and themain rail 47 have the same cross-sectional configuration. Eachrail member 48 viaball bearings 49. The rolling of theball bearings 49 allows therails member 48. Eachmain rail 47 is connected to the associated inner side of the vertical wall of thesecond member 41 and thesecond cover section 43. This structure constitutesslide mechanisms 18 and enables thesecond member 41 and thesecond section 43 to be slidable above theframe 11. - The
second member 41 is slidable between a first operational position and a second operational position. Thesecond member 41 shields the upstream half of the conveyingdevice 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 conveyingdevice 12 at the second operational position. By positioning thesecond member 41 in its first operational position, anouter edge 41a of thesecond member 41 will be located above the vicinity of anupstream edge 11a of theframe 11. By positioning thesecond member 41 at the second operational position, aninner edge 41b of thesecond member 41 will be located above the vicinity of theupstream edge 11a. - The
second section 43 is slidable between a first active position and a second active position. Thesecond section 43 shields the downstream half of the deliveringdevice 14 at the first active position and overhangs from theframe 11 exposing substantially all of the deliveringdevice 14 at the second active position. By positioning thesecond section 43 at the first active position, anouter edge 43a of thesecond section 43 will be located above the vicinity of adownstream edge 11b of theframe 11 . By positioning thesecond section 43 at the second active position, aninner edge 43b of thesecond section 43 will be located above the vicinity of thedownstream edge 11b. - Intermediate support rails 51, extending parallel to the
main rails 47, are fixed to the outer side of the vertical walls of thesecond member 41 andsecond section 43. A secondarymovable rail 53 is attached to its associatedsupport rail 51 via an interposingmember 52. As shown in Fig. 6, thesupport rail 51 and thesecondary rail 53 have the same cross-sectional configuration. Eachrail member 52 viaball bearings 50. The rolling of theball bearings 50 allows therails member 52. Eachsecondary rail 53 is connected to an inner vertical wall of thefirst member 42 andfirst section 44. This structure constitutesslide mechanisms 19 and enables thefirst member 42 and thefirst section 44 to be slidable above theframe 11. - The
first member 42 is slidable between a first operational position and a middle operational position. Thefirst member 42 shields the downstream half of the conveyingdevice 12 at the first operational position (refer to Fig. 5) and shields the upstream half of the conveyingdevice 12 at the middle operational position (refer to Fig. 7). By positioning thefirst member 42 at the first operational position, anouter edge 42a of thefirst member 42 will be located above the vicinity of the center of the conveyingdevice 12. By positioning thefirst member 42 at the middle operational position, aninner edge 42b will be located above the vicinity of the center of the conveyingdevice 12. - The
first section 44 is slidable between a first active position and a second active position. Thefirst section 44 shields the upstream half of the deliveringdevice 14 at the first active position and shields the downstream half of the deliveringdevice 14 at the middle active position. By positioning thefirst section 44 at the first active position, anouter edge 44a of thefirst section 44 will be located above the vicinity of the center of the delivering device 14 (Fig. 9). By positioning thefirst section 44 at the middle active position, aninner edge 44b will be located above the vicinity of the center of the deliveringdevice 14. - Each
cover member cover section second member 41 and thesecond section 43 are substantially equal in length with the associatedfirst member 42 andfirst section 44 in the longitudinal direction parallel to the sheet conveying direction. Thesecond member 41 and thesecond section 43 are formed slightly narrower in width and slightly smaller in height when compared to the associatedfirst member 42 and thefirst section 44. Consequently, the configuration of each member andsection first member 42 andfirst section 44 to overlap and accommodate the associatedsecond member 41 andsecond section 43 as shown in Fig. 7. Thefirst member 42 and thefirst section 44 are provided withhandles 40 on their top surfaces. - The conveying
device 12 and the deliveringdevice 14 are completely shielded in Fig. 1. From this state, thehandles 40 on thecovers printing mechanism 13 to expose eachdevice first member 42 slides until it reaches the middle operational position and accommodates and overlaps thesecond member 41 as shown in Fig. 2. Thefirst section 44 slides until it reaches the middle active position and accommodates and overlaps thesecond section 43 as shown in Fig. 2. The sliding action of thefirst member 42 and thefirst section 44 is enabled by theslide mechanisms 19. By further applying outward force to thehandles 40, thefirst member 42 and thefirst section 44, enclosing the associatedsecond member 41 andsecond section 43, slide integrally with thesecond member 41 and thesecond section 43 untilmembers sections members sections frame 11 thus exposing substantially all of the conveyingdevice 12 and deliveringdevice 14. The structure of thecovers covers - Furthermore, application of force to the
handles 40 in the opposite direction will allow eachmember section slide mechanisms covers - A detected piece 36 (Fig. 5) is fixed to the outer lateral wall of the
second member 42 and thesecond section 44. An associatedsensor 37 is fixed tobrackets 38 secured to theframe 11 near theprinting mechanism 13. Asafety switch 35 comprises thesensor 37 and the detectingplate 36. The detectedpiece 36 abuts with thesensor 37 when the associatedcover sensor 37 of thesafety switch 35. - As shown in the block diagram of Fig. 10, a
start switch 33, ajog motion switch 34, and thesafety switch 35 are connected to acontroller 20. Thestart switch 33 and thejog motion switch 34 are on theoperation panel 30. When a signal from thesafety switch 35 is sent to thecontroller 20, thecontroller 20 accepts a signal sent from thestart switch 33, and moves thedrive section 21 in accordance with the signal. Thedrive section 21 then continuously drives theprinting mechanism 13, conveyingdevice 12, and deliveringdevice 14. Therefore, the printing machine becomes operable only when the upper surface of itsframe 11 is completely closed thus improving operator safety. - When there is no signal sent from the
safety switch 35, the signal from thestart switch 33 is invalidated and the motion of thedrive section 21 is stopped. As a result, opening of thecovers drive section 21 thus improving operator safety. However, thecontroller 20 accepts the signal from thejog motion switch 34 and drives theprinting mechanism 13, conveyingdevice 12, anddelivery device 14 in a jog motion in accordance with the signal. Jog motion operation is permitted when thecovers - As described above, the connection of each
cover frame 11 via theslide mechanisms covers cover frame 11 is exposed. If necessary, the conveyingdevice 12 and the deliveringdevice 14 can completely be exposed. Therefore, thecovers - Although only one embodiment of the present invention has been described in detail herein, it should be apparent to those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit and scope of the invention. Particularly, it should be understood that the present invention may be embodied in the modes given below.
- (1) The length of the second member and second section may be altered. This will alter the range of the portion covered by the second member or second section.
- (2) Provide each cover with three or more parts. This will further minimize the amount of cover overhang from the frame.
Claims (9)
- A printing machine having a printing mechanism (13) located at a substantially center position on a frame(11), a conveying device (12) disposed upstream of the printing mechanism (13) and a delivering device (14) disposed downstream of the printing mechanism (13), wherein the printing mechanism (13) performs printing operation on a sheet supplied to the printing mechanism (13) by the conveying device (12) and the delivering device (14) delivers the printed sheet, said printing machine being characterized by:a first cover (16) mounted on the frame (11), said first cover (16) being slidable between a position to shield the conveying device (12) and a position to expose the conveying device (12); anda second cover (17) mounted on the frame (11), said second cover (17) being slidable between a position to shield the delivering device (14) and a position to expose the delivering device (14).
- A printing machine according to Claim 1, wherein said first cover (16) includes a first cover member (42) and a second cover member (41);said first cover member (42) being slidable between a first operational position and a second operational position, said first cover member (42) shielding a half of the conveying device (12) at the downstream side of the conveying device (12) in a position close to the printing mechanism (13) when placed at the first operational position and exposing substantially all of the conveying device (12) when placed at the second operational position; andsaid second cover member (41) being slidable between a first operational position and a second operational position, said second cover member (41) shielding a half of the conveying device (12) at the upstream side of the conveying device (12) in a position spaced apart from the printing mechanism (13) when placed at the first operational position and exposing substantially all of the conveying device (12) when placed at the second operational position;wherein said first cover member (42) overlaps the second cover member (41) when both cover members (41, 42) are placed at the second operational position.
- A printing machine according to Claim 1, wherein said second cover (17) includes a first cover section (44) and a second cover section (43);said first cover section (44) being slidable between a first active position and a second active position, said first cover section (44) shielding a half of the delivering device (14) at the upstream side of the delivering device (14) in a position close to the printing mechanism (13) when placed at the first active position and exposing substantially all of the delivering device (14) when placed at the second active position; andsaid second cover section (43) being slidable between a first active position and a second active position, said second cover section (43) shielding a half of the delivering device (14) at the downstream side of the delivering device (14) in a position spaced apart from the printing mechanism (13) when placed at the first active position and exposing substantially all of the delivering device (14) when placed at the second active position;wherein said first cover section (44) overlaps the second cover section (43) when both cover sections (43, 44) are placed at the second active position.
- A printing machine according to Claim 2, wherein said first cover member (42) is slidably mounted on the second cover member (41).
- A printing machine according to Claim 3, wherein said first cover section (44) is slidably mounted on the second cover section (43).
- A printing machine according to Claim 4 further comprising:a pair of support rails (45) mounted on the upper surface of the frame (11) and located spaced apart from each other by a predetermined distance, said rails (45) extending parallel to each other in a conveying direction of the sheet;a pair of movable main rails (47) slidably attached to the associated support rails (45) and connected to opposite sides of the second cover member (41), respectively;a pair of intermediate support rails (51) connected to opposite sides of second cover member (41), respectively, and extending parallel to the main movable rails (47); anda pair of secondary movable rails (53) slidably attached to the associated intermediate support rails (51) and connected to opposite sides of the first cover member (42), respectively.
- A printing machine according to Claim 5 further comprising:a pair of support rails (45) mounted on the upper surface of the frame (11) and located spaced apart from each other by a predetermined distance, said rails (45) extending parallel to each other in a conveying direction of the sheet;a pair of movable main rails slidably attached to the associated support rails (45) and connected to opposite sides of the second cover section (43), respectively;a pair of intermediate support rails (51) connected to opposite sides of second cover section (43), respectively and extending parallel to the main movable rails (47); anda pair of secondary movable rails (53) slidably attached to the associated intermediate support rails (51) and connected to opposite sides of the first cover section (44), respectively.
- A printing machine according to Claim 1 further comprising:a pair of detected pieces (36) connected to the first and the second covers (16, 17), respectively; anda pair of sensors (37) disposed near the printing mechanism (13), each sensor (37) detecting one piece (36) in accordance with movement of the associated cover members to transmit a predetermined signal.
- A printing machine according to Claim 8 further comprising:a drive section (21) for driving the printing mechanism (13), conveying device (12) and delivering device (14); anda controller (20) for controlling the drive section (12);wherein said controller (20) operates to drive the printing mechanism (13), conveying device (12) and delivering device (14) in response to the signal from each sensor (37).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7095590A JPH08290549A (en) | 1995-04-20 | 1995-04-20 | Printing press with sliding cover |
JP95590/95 | 1995-04-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0738595A1 true EP0738595A1 (en) | 1996-10-23 |
EP0738595B1 EP0738595B1 (en) | 1998-08-12 |
Family
ID=14141801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950106569 Expired - Lifetime EP0738595B1 (en) | 1995-04-20 | 1995-05-02 | Sliding cover for printing machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0738595B1 (en) |
JP (1) | JPH08290549A (en) |
DE (1) | DE69504030T2 (en) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100462794B1 (en) * | 2002-05-15 | 2004-12-17 | 세크론 주식회사 | mask cover of screen printer |
DE10331755C5 (en) * | 2002-08-22 | 2011-04-14 | Heidelberger Druckmaschinen Ag | Protective device on the boom |
Citations (2)
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 |
-
1995
- 1995-04-20 JP JP7095590A patent/JPH08290549A/en active Pending
- 1995-05-02 EP EP19950106569 patent/EP0738595B1/en not_active Expired - Lifetime
- 1995-05-02 DE DE1995604030 patent/DE69504030T2/en not_active Expired - Lifetime
Patent Citations (2)
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)
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 (en) | 1998-08-12 |
DE69504030D1 (en) | 1998-09-17 |
DE69504030T2 (en) | 1999-05-06 |
JPH08290549A (en) | 1996-11-05 |
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