JP3895348B2 - Drawing device - Google Patents

Description

  The present invention relates to a drawing apparatus that fixes a sheet-like recording material on an outer peripheral surface of a drum and performs drawing on the recording material.

  A drawing apparatus is used to perform drawing by irradiating various photosensitive materials with light. In a drum-type drawing apparatus, a photosensitive material is mounted on a recording drum that can rotate in the main scanning direction, and a recording head equipped with a laser diode or the like moves in a sub-scanning direction parallel to the rotation axis of the recording drum to move the photosensitive material. Draw on.

  FIG. 21 is a schematic perspective view of a recording drum of a conventional drawing apparatus. 21 is mounted with an aluminum printing plate 160 as a photosensitive material. A front end clamp 170 that fixes one end of the printing plate 160 and a rear end clamp 180 that fixes the other end of the printing plate 160 are attached to the outer peripheral surface of the recording drum 150. The rear end clamp 180 includes a magnet and is fixed to the outer peripheral surface position of the recording drum 150 according to the size of the printing plate 160 by a magnetic force.

  The recording drum 150 to which the printing plate 160 is attached is driven to rotate at a relatively low speed around the rotation shaft 190, and drawing is performed on the surface of the printing plate 160.

  In such a drawing apparatus, dust or the like may adhere to the printing plate 160 on the outer peripheral surface of the recording drum 150.

  An object of the present invention is to provide a drawing apparatus capable of removing dust and the like from a recording material on an outer peripheral surface of a drum.

(1) 1st invention The drawing apparatus which concerns on 1st invention has a rotating shaft, the cylindrical drum by which a sheet-like recording material is mounted on an outer peripheral surface, and the drum is rotated around the rotating shaft. According to the image signal with respect to the surface of the recording material fixed on the outer peripheral surface of the drum, the fixing member which is provided on the outer peripheral surface of the drum and which is provided on the outer peripheral surface of the drum and fixes the recording material on the outer peripheral surface of the drum A drawing means for drawing an image by irradiating light, and a recording means arranged along the outer peripheral surface of the drum parallel to the rotation axis of the drum and contacting the surface of the recording material so that the recording material is placed on the outer peripheral surface of the drum A first roller for press-bonding to the recording medium, and a first roller disposed along the first roller, in contact with the first roller for press-bonding the recording material, and dust from the first roller is transferred a second roller, serial on the outer peripheral surface of the drum When the recording material is pressed, the first roller is moved to a position in contact with the surface of the recording material on the outer peripheral surface of the drum and the second roller, and when the recording material is not mounted on the outer peripheral surface of the drum Roller moving means for moving the first roller to a position away from the outer peripheral surface of the drum and the second roller is provided.

In drawing apparatus according to the present invention, sheet-like recording material on the peripheral surface of the cylindrical drum is mounted, is fixed to the outer peripheral surface of the drum by a fixing member. In this state, the drum on which the recording material is fixed is rotated around the rotation axis by the rotation driving unit, and an image is drawn on the surface of the recording material fixed on the outer peripheral surface of the drum by the drawing unit .

When the recording material is pressure-bonded onto the outer peripheral surface of the drum, if the first roller is moved to a position in contact with the surface of the recording material on the outer peripheral surface of the drum and the second roller by the roller moving means, The roller uniformly presses the recording material fixed on the outer peripheral surface of the drum. Thereby, the recording material on the outer peripheral surface of the drum is in close contact with the outer peripheral surface of the drum.

  Further, dust or the like adhering to the surface of the recording material on the outer peripheral surface of the drum is transferred to the first roller, and dust transferred to the first roller is further transferred to the second roller. Thereby, dust etc. can be removed from the recording material on the outer peripheral surface of the drum.

When the recording material is not mounted on the outer peripheral surface of the drum, if the first roller is moved away from the outer peripheral surface of the drum and the second roller by the roller moving means, the recording on the outer peripheral surface of the drum is performed. Material is released from the first roller. At this time, since the first roller is also separated from the second roller, the dust transferred to the second roller is not transferred to the first roller again.

(2) Second invention A drawing apparatus according to the second invention has a rotating shaft, a cylindrical drum on which a sheet-like recording material is mounted on the outer peripheral surface, and the drum rotated around the rotating shaft. A rotation driving means, a fixing member provided on the outer peripheral surface of the drum and fixing the recording material to the outer peripheral surface of the drum, and a light according to an image signal on the surface of the recording material fixed on the outer peripheral surface of the drum. a drawing unit that performs image drawing by irradiating, when fixing the recording material to the outer peripheral surface of the drum, and squeegee rollers for the recording material Ru is crimped onto the outer peripheral surface of the drum by contacting the surface of the recording material , in contact with the squeegee roller Rutoki to crimp the recording material, and the the adhesive roller dust squeegee roller is transferred, outside of the drum the squeegee roller when fixing the recording material onto the outer peripheral surface of the drum Move to a position where the surface of the recording material comes into contact with the surface of the recording material and the adhesive roller, and move the squeegee roller to a position away from the outer surface of the drum and the adhesive roller when no recording material is mounted on the outer surface of the drum And a roller moving means .

In the drawing apparatus according to the present invention, a sheet-like recording material is mounted on the outer peripheral surface of a cylindrical drum, and is fixed to the outer peripheral surface of the drum by a fixing member. In this state, the drum is rotated around the rotation axis by the rotation driving unit , and the image is drawn by irradiating the surface of the recording material fixed on the outer peripheral surface of the drum with light according to the image signal by the drawing unit. Is done.
When fixing the record material on the outer peripheral surface of the drum, moving the squeegee roller by the roller moving means to a position in contact with the surface and the adhesive roller of the recording material on the outer peripheral surface of the drum, squeegee rollers of the drum outer peripheral The recording material fixed on the surface is pressed uniformly. Thereby, the recording material on the outer peripheral surface of the drum is in close contact with the outer peripheral surface of the drum .
Further, dust attached to the surface of the recording material on the outer peripheral surface of the drum is transferred to the squeegee roller, and dust transferred to the squeegee roller is further transferred to the adhesive roller. Thereby, dust etc. can be removed from the recording material on the outer peripheral surface of the drum.
When the recording material is not mounted on the outer peripheral surface of the drum, if the squeegee roller is moved to a position separated from the outer peripheral surface of the drum and the adhesive roller by the roller moving means, the recording material on the outer peripheral surface of the drum is moved to the squeegee roller. Released from. At this time, since the squeegee roller is also separated from the adhesive roller, the dust transferred to the adhesive roller is not transferred again to the squeegee roller.

(3) Third invention A drawing apparatus according to the third invention has a rotating shaft, a cylindrical drum on which a sheet-like recording material is mounted on the outer peripheral surface, and the drum rotated around the rotating shaft. A rotation driving means, a fixing member provided on the outer peripheral surface of the drum and fixing the recording material to the outer peripheral surface of the drum, and a light according to an image signal on the surface of the recording material fixed on the outer peripheral surface of the drum. a drawing unit that performs image drawing by irradiating, when unloading the recording material from the peripheral surface of the drum, and squeegee rollers for the recording material Ru is crimped onto the outer peripheral surface of the drum by contacting the surface of the recording material , squeegee rollers when in contact with the squeegee roller Rutoki to crimp the recording material, and the adhesive roller dust of the squeegee roller is transferred, the recording material on the outer peripheral surface of the drum is not attached Is moved away from the outer peripheral surface of the drum and the adhesive roller, and the squeegee roller is moved to a position in contact with the surface of the recording material and the adhesive roller on the outer peripheral surface of the drum when the recording material is unloaded from the outer peripheral surface of the drum. And a roller moving means .

In the drawing apparatus according to the present invention, a sheet-like recording material is mounted on the outer peripheral surface of a cylindrical drum, and is fixed to the outer peripheral surface of the drum by a fixing member. In this state, the drum is rotated around the rotation axis by the rotation driving unit , and the image is drawn by irradiating the surface of the recording material fixed on the outer peripheral surface of the drum with light according to the image signal by the drawing unit. Is done.
When unloading the record material from the drum surface, the roller moving means is moved to a position contacting the squeegee roller to the surface and the adhesive roller of the recording material on the peripheral surface of the drum, the squeegee roller on the outer peripheral surface of the drum The fixed recording material is pressed uniformly. Thereby, the recording material on the peripheral surface of the drum is uniformly brought into close contact with the outer peripheral surface of the drum.
Further, dust attached to the surface of the recording material on the outer peripheral surface of the drum is transferred to the squeegee roller, and dust transferred to the squeegee roller is further transferred to the adhesive roller. Thereby, dust etc. can be removed from the recording material on the outer peripheral surface of the drum.
When the recording material is not mounted on the outer peripheral surface of the drum, if the squeegee roller is moved to a position separated from the outer peripheral surface of the drum and the adhesive roller by the roller moving means, the recording material on the outer peripheral surface of the drum is moved to the squeegee roller. Released from. At this time, since the squeegee roller is also separated from the adhesive roller, the dust transferred to the adhesive roller is not transferred again to the squeegee roller.

  ADVANTAGE OF THE INVENTION According to this invention, the drawing apparatus which can remove dust etc. from the recording material on the outer peripheral surface of a drum can be provided.

  FIG. 1 is a schematic plan view of a drawing apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic side view of the drawing apparatus of FIG.

  1 and 2, the drawing apparatus includes a cylindrical recording drum 1. The recording drum 1 is rotationally driven in the direction of arrow A (main scanning direction) around the rotational axis 1a by the rotational driving device 4. An aluminum printing plate 100 is mounted on the outer peripheral surface of the recording drum 1 as a photosensitive material. One end of the printing plate 100 is fixed to the outer peripheral surface of the recording drum 1 by a plurality of front end clamps 2, and the other end of the printing plate 100 is fixed to the outer peripheral surface of the recording drum 1 by a plurality of rear end clamps 3.

  A recording head 8 having a plurality of laser diodes 81 is disposed on the front side of the recording drum 1. The recording head 8 is movably attached to the guide 82 and moves in the direction of arrow B (sub-scanning direction) in synchronization with the rotation of the recording drum 1.

  The plurality of laser diodes 81 of the recording head 8 are driven by a laser diode drive circuit unit 110. The laser diode drive circuit unit 110 includes a plurality of laser diode drive circuits 111 corresponding to the plurality of laser diodes 81 of the recording head 8.

  The image signal generation circuit 130 generates a serial image signal. The serial / parallel converter 120 converts the serial image signal generated by the image signal generation circuit 130 into a parallel image signal, and converts the image signal to the plurality of laser diode drive circuits 111 of the laser diode drive circuit unit 110. Give each. As a result, each laser diode 81 of the recording head 8 is driven by the corresponding laser diode drive circuit 111 to irradiate the printing plate 100 with laser light.

  As shown in FIG. 2, a clamp driving device 5 is provided on the rear side of the recording drum 1. The clamp driving device 5 is used to attach the rear end clamp 3 on the recording drum 1, remove the rear end clamp 3 from the recording drum 1, and release the front end clamp 2 on the recording drum 1.

  The clamp driving device 5 includes a pair of clamp arms 6 that can swing in the direction of arrow C. A drive bar 60 is attached between the pair of clamp arms 6, and a plurality of first drive devices 7 are attached to the drive bar 60. As shown in FIG. 1, the first driving device 7 is provided with a driving pin 75, two holding pins 76 and a release pin 78.

  As shown in FIG. 2, a transport unit 9 is disposed above the recording drum 1 so as to be swingable in the direction of arrow R. The transport unit 9 includes a first transport path 91 for loading a printing plate and a second transport path 92 for transporting a printing plate. When the plate 100 is carried in, the plate 100 is supplied onto the recording drum 1 through the first conveyance path 91 of the conveyance unit 9. Further, when the printing plate 100 is unloaded, the printing plate 100 removed from the recording drum 1 is unloaded through the second conveyance path 92 of the conveyance unit 9.

  A punching device 10 for opening a positioning hole in the printing plate 100 is disposed at the front end side of the transport unit 9. The plate 100 is supplied to the punch device 10 through the first conveyance path 91 of the conveyance unit 9 before being supplied onto the recording drum 1, and a positioning hole is formed in the peripheral portion of the plate 100. The positioning holes of the printing plate 100 engage with positioning pins (not shown) provided on the outer peripheral surface of the recording drum 1.

  FIG. 3 is a perspective view of the recording drum 1 in the drawing apparatus of FIG. As shown in FIG. 3, a plurality of clamp grooves 11 extending in the circumferential direction are formed on the outer peripheral surface of the recording drum 1. A plurality of front end clamps 2 and a plurality of rear end clamps 3 are provided on the outer peripheral surface of the recording drum 1.

  The plurality of front end clamps 2 are arranged along the axial direction of the recording drum 1 and are fixed to the outer peripheral surface of the recording drum 1. The plurality of rear end clamps 3 are arranged along the axial direction of the recording drum 1, and are attached to the outer peripheral surface of the recording drum 1 so as to be movable in the circumferential direction along the clamp grooves 11.

  FIG. 4 is an exploded perspective view of the tip clamp 2, and FIG. 5 is a side view of the tip clamp 2. 4 and 5, the tip clamp 2 includes a clamp body 20, a rotary shaft 21, two bearings 22, four bolts 23, two metal balls 24, two springs 25, and a plurality of pressing rubbers 26. .

  The bearing 22 is fixed to the recording drum 1 by a bolt 23. The clamp body 20 is attached to a bearing 22 so as to be rotatable by a rotation shaft 21. A pressing rubber 26 is attached to the lower surface of one side 20a of the clamp body 20. As shown in FIG. 5, a recess 12 is formed in the recording drum 1 below the other side 20 b of the clamp body 20. A spring 25 is mounted between the lower surface of the other side portion 20 b of the clamp body 20 and the concave portion 12 of the recording drum 1, and a metal ball 24 is inserted into the spring 25.

  Note that ceramic coating may be applied to the lower surface of one side 20a of the clamp body 20 instead of attaching the pressing rubber 26. This improves durability without reducing frictional forces.

  Due to the reaction force of the spring 25, the other side portion 20b of the clamp body 20 is urged in the direction away from the recording drum 1 around the rotation shaft 21 as indicated by an arrow P1. As a result, a force in a direction approaching the recording drum 1 acts on one side 20a of the clamp body 20 as indicated by an arrow P2, and one end of the printing plate 100 on the recording drum 1 is pressed by the pressing rubber 26.

  The length L1 of one side 20a of the clamp body 20 with respect to the rotating shaft 21 is set shorter than the length L2 of the other side 20b of the clamp body 20.

  When the recording drum 1 rotates, the metal ball 24 moves in the direction of the arrow P <b> 1 by centrifugal force, and pushes the other side 20 b of the clamp body 20 away from the recording drum 1. Further, centrifugal force acts on one side 20a and the other side 20b of the clamp body 20, respectively. Since the length L1 of one side 20a of the clamp body 20 is set to be shorter than the length of the other side 20b of the clamp body 20, one side 20a of the clamp body 20 around the rotation shaft 21 is set. The rotational moment due to is smaller than the rotational moment due to the other side 20b. Thereby, a force in the direction of separating the other side portion 20b of the clamp body 20 from the outer peripheral surface of the recording drum 1 acts, and one end of the printing plate 100 is connected to the recording drum by the pressing rubber 26 of the one side portion 20a of the clamp body 20. 1 is firmly pressed against the outer peripheral surface of the steel sheet.

  As the rotational speed of the recording drum 1 increases, the force acting on the other side 20b of the clamp body 20 increases, and the pressing rubber 26 on one side 20a of the clamp body 20 connects one end of the printing plate 100 to the recording drum 1. The force which presses on an outer peripheral surface becomes large. Therefore, even when the recording drum 1 rotates at high speed, one end of the printing plate 100 is securely fixed to the outer peripheral surface of the recording drum 100 by the front end clamp 20, so that the displacement and detachment of the printing plate 100 on the outer peripheral surface of the recording drum 1 are prevented. Does not occur.

  6 is an exploded perspective view of the rear end clamp 3, FIG. 7 is a partial cross-sectional view in the longitudinal direction of the rear end clamp 3, and FIG. 8 is a cross-sectional view in the width direction of the rear end clamp 3.

  As shown in FIGS. 6 to 8, the rear end clamp 3 includes a clamp body 30, a clamp bolt connecting plate 31, an engaging member 32, two first clamp bolts 33, two second clamp bolts 34, and two screws. 35, two leaf springs 36, and four springs 37.

  A rectangular recess 38 is provided at the center of the clamp body 30, and rectangular recesses 39 are provided on both sides of the recess 38. Holding holes 40 are provided in the vicinity of both ends of the clamp body 30. The holding hole 40 includes a circular portion and a narrow portion. Holding pins 76 of the first driving device 7 described later are inserted into the holding holes 40, respectively.

  The clamp bolt connecting plate 31 is provided so as to be slidable in the direction of the arrow S in the three recesses 38 and 39 through the side surfaces of the recesses 38 and 39. The engaging member 32 is fixed to the clamp bolt connecting plate 31 in the recess 38. The drive pin 75 of the first drive device 7 is engaged with the engagement hole 32 a of the engagement member 32. In the vicinity of both end portions of the clamp bolt connecting plate 31, elongated holes 31a are formed.

  On the outer peripheral surface of the second clamp bolt 34, a projecting portion 34a projecting on both sides is provided. The second clamp bolt 34 is inserted into a hole 39 a provided in the bottom surface of the recess 39 of the clamp body 30. A first clamp bolt 33 is attached to the head of the second clamp bolt 34 by a screw 35. A protrusion 33 a is provided on the lower surface of the first clamp bolt 33. The protrusion 33 a of the first clamp bolt 33 engages with the long hole 31 a of the clamp bolt connecting plate 31. Accordingly, when the engaging member 32 is slid in the direction of the arrow S, the clamp bolt connecting plate 31 slides in the direction of the arrow S together with the engaging member 32, and the first clamp bolt 33 and the second clamp bolt 34 are moved to the arrow Q. It rotates in the direction of.

  As shown in FIG. 7, inner edge portions 13 projecting inward are provided at upper ends of both side surfaces of the clamp groove 11 formed in the recording drum 1. As shown in FIG. 7A, when the protrusion 34 a of the second clamp bolt 34 is positioned in parallel with the clamp groove 11, the protrusion 34 a does not engage with the inner edge 13 of the clamp groove 11. In this case, the rear end clamp 3 can be detached from the recording drum 1.

  On the other hand, as shown in FIG. 7B, when the protrusion 34 a of the second clamp bolt 34 is positioned perpendicular to the clamp groove 11 of the recording drum 1, the protrusion 34 a is the inner edge 13 of the clamp groove 11. Engage with. Thereby, the rear end clamp 3 is fixed to the recording drum 1.

  As shown in FIG. 8, the other end of the printing plate 100 is sandwiched between the lower surface of one side 30 a of the clamp body 30 and the outer peripheral surface of the recording drum 1. A lead plate 42 is embedded in the other side 30 b of the clamp body 30. A leaf spring 36 and a spring 37 are mounted on the lower surface of the other side portion 30 b of the clamp body 30.

  Due to the reaction force of the leaf spring 36 and the spring 37, the other side 30b of the clamp body 30 is urged away from the recording drum 1 around the second clamp bolt 34 as indicated by the arrow Y1. As a result, a force in a direction in which the one side portion 30a of the clamp main body 30 approaches the recording drum 1 as indicated by an arrow Y2 acts, and one end of the printing plate 100 on the recording drum 1 is one side portion 30a of the clamp main body 30. It is pressed by the lower surface of.

  The length L3 of one side 30a of the clamp body with respect to the second clamp bolt 34 is set to be shorter than the length L4 of the other side 30b of the clamp body 30.

  When the recording drum 1 rotates, centrifugal force acts on the lead plate 42 embedded in the lower surface of the other side 30b of the clamp body 30 in the direction indicated by the arrow Y1. Further, centrifugal force acts on one side portion 30a and the other side portion 30b of the clamp main body 30, respectively. Since the length L3 of one side 30a of the clamp body 30 is set shorter than the length L4 of the other side 30b of the clamp body 30, one of the clamp bodies 30 centered on the second clamp bolt 34 is provided. The rotational moment due to the side portion 30a is smaller than the rotational moment due to the other side portion 30b. As a result, a force in the direction of separating the other side portion 30 b of the clamp body 30 from the outer peripheral surface of the recording drum 1 acts, and the other end of the printing plate 100 is connected to the outer periphery of the recording drum 1 by the one side portion 30 a of the clamp body 30. Pressed firmly against the surface.

  As the rotational speed of the recording drum 1 increases, the force acting on the other side portion 30b of the clamp body 30 increases, and one side portion 30a of the clamp body 30 makes the other end of the printing plate 100 the outer peripheral surface of the recording drum 1. The pressing force becomes stronger. Therefore, even when the recording drum 1 rotates at high speed, the other end of the printing plate 100 is securely fixed to the outer peripheral surface of the recording drum 1 by the rear end clamp 3. No detachment occurs.

  FIG. 9A is a cross-sectional view of a state before the rear end clamp 3 is held by the first driving device 7, and FIG. 9B is a plan view of the rear end clamp 3. FIG. 10A is a cross-sectional view showing a state in which the rear end clamp 3 is held by the first driving device 7, and FIG. 10B is a plan view of the rear end clamp 3.

  As shown in FIG. 9, the first drive device 7 includes a drive device body 70, a clamp bolt drive motor 71, a drive member 72, and a position sensor 73. A gear 74 is attached to the clamp bolt drive motor 71. A planar gear 72 a that meshes with the gear 74 is provided on the side surface of the drive member 72. The drive member 72 is provided to be slidable in the direction of the arrow U by the rotation of the clamp bolt drive motor 71. In addition, a drive pin 75 is provided in the center of the lower surface of the drive member 72, and a holding pin 76 is provided in the vicinity of both ends of the lower surface of the drive member 72. The position sensor 73 detects the position of the drive member 72.

  In the state of FIG. 9, when the first driving device 7 approaches the rear end clamp 3, the drive pin 75 is inserted into the engagement hole 32 a of the engagement member 32 of the rear end clamp 3 and the holding pin 76 is moved to the rear end. The clamp 3 is inserted into the circular portion of the holding hole 40.

  Thereafter, when the clamp bolt drive motor 71 rotates, as shown in FIG. 10, the drive member 72 moves in the direction of the arrow U <b> 1, and the engagement member 32 engaged with the drive pin 75 moves together with the clamp bolt connecting plate 31 with the arrow U <b> 1. Slide in the direction of. Thereby, the first clamp bolt 33 rotates together with the second clamp bolt 34. Further, the holding pin 76 moves to the narrow portion of the holding hole 40 of the rear end clamp 3. As a result, the rear end clamp 3 is held by the first driving device 7, and the protrusion 34 a of the second clamp bolt 34 is parallel to the clamp groove 11 of the recording drum 1 as shown in FIG. 7A. It becomes a state. In this state, the second clamp bolt 34 of the rear end clamp 3 can be inserted into the clamp groove 11 of the recording drum 1.

  Next, when the clamp bolt drive motor 71 rotates in the reverse direction, the engaging member 32 that engages with the drive pin 75 slides in the direction opposite to the arrow U1 together with the clamp bolt connecting plate 31, and the first clamp bolt 33 is the second. It rotates in the opposite direction together with the clamp bolt 34. Further, the holding pin 76 moves to the circular portion of the holding hole 40 of the rear end clamp 3. Thereby, as shown in FIG. 7B, the protruding portion 34 a of the second clamp bolt 34 is in a state perpendicular to the clamp groove 11 of the recording drum 1. As a result, the second clamp bolt 34 of the rear end clamp 3 is fixed to the clamp groove 11 of the recording drum 1, and the first driving device 7 can be detached from the rear end clamp 3.

  By the reverse operation, the rear end clamp 3 can be removed from the recording drum 1 and the rear end clamp 3 can be held by the first driving device 7.

  FIG. 11 is a side view showing the configuration of the clamp driving device 5.

  A gear 51 is attached to the clamp arm drive motor 50, the gear 51 is engaged with the gear 52, and an engaging portion 52 a provided on the gear 52 is engaged with the elongated hole 6 a of the clamp arm 6. As the clamp arm drive motor 50 rotates, the clamp arm 6 swings in the direction of arrow C about the rotation shaft 61.

  The clamp driving device 5 is provided with a squeegee device 53 and a second driving device 62. The squeegee device 53 includes a squeegee drive motor 54, a gear 55, a swing member 56, an adhesive roller 57, and a squeegee roller 58. A gear 55 is attached to the squeegee drive motor 54, and the swing member 56 meshes with the gear 55. The swing member 56 is attached to a squeegee roller 58. When the squeegee drive motor 54 rotates, the swing member 56 swings through the gear 55, and the squeegee roller 58 is pressed against the outer peripheral surface of the recording drum 1.

  The second drive device 62 includes a cam drive motor 63, gears 64a, 64b, 64c, 64d and a cam 65. A gear 64 a is attached to the cam drive motor 63. The rotational force of the cam drive motor 63 is transmitted to the gear 64d via the gears 64a, 64b and 64c. A cam 65 is attached to the gear 64d.

  As shown in FIG. 11, the position of the clamp arm 6 in a state in which the first driving device 7 is separated from the outer peripheral surface of the recording drum 1 is referred to as an origin position, and the first driving device 7 approaches the outer peripheral surface of the recording drum 1. The position of the clamp arm 6 in the state is called the end position.

  Next, the operation of the clamp driving device 5 will be described with reference to FIGS. First, as shown in FIG. 11, the recording drum 1 is rotated until the tip clamp 2 attached to the outer peripheral surface of the recording drum 1 reaches the position p1 of the release pin 78 of the first driving device 7, and then the recording drum 1 is rotated. The rotation of 1 is stopped. The clamp arm 6 is swung from the origin position shown in FIG. 11 to the end position shown in FIG. 12 by the clamp arm drive motor 50. Then, the first driving device 7 approaches the tip clamp 2 attached to the outer peripheral surface of the recording drum 1, and the release pin 78 presses one side of the tip clamp 2.

  Thereby, as shown in FIG. 13, a gap is formed between the other side portion of the tip clamp 2 and the outer peripheral surface of the recording drum 1. In this state, the printing plate 100 is carried in through the first conveyance path 91 of the conveyance unit 9 in FIG. 2, and the printing plate 100 is inserted into the gap between the other side of the tip clamp 2 and the outer peripheral surface of the recording drum 1. The tip is inserted.

  Thereafter, the clamp arm 6 is returned to the origin position by the clamp arm drive motor 50, and the first drive device 7 is separated from the outer peripheral surface of the recording drum 1. Thereby, the front end of the printing plate 100 is fixed to the outer peripheral surface of the recording drum 1 by the front end clamp 2.

  The plate 100 is transported by the transport unit 9 shown in FIG. 2 while rotating the recording drum 1, and the squeegee driving motor 54 is reached when the front end clamp 2 reaches the position p 2 that has passed the squeegee roller 58 as shown in FIG. Thus, the squeegee roller 58 is pressed against the printing plate 100 on the outer peripheral surface of the recording drum 1. At this time, the squeegee roller 58 also contacts the adhesive roller 57. As the recording drum 1 rotates, dust and the like are transferred from the surface of the printing plate 100 to the outer peripheral surface of the squeegee roller 58, and dust transferred to the squeegee roller 58 is further transferred to the adhesive roller 57.

  Thereafter, as shown in FIG. 15, when the rear end of the printing plate 100 reaches the position p3 of the rear end clamp 3 held by the first driving device 7 by the rotation of the recording drum 1, the rotation of the recording drum 1 is stopped. . This stop position varies depending on the size of the printing plate 100 to be supplied. In this embodiment, since the printing plate 100 is fixed using the grooves 11 formed in the circumferential direction of the recording drum 1, the printing plate 100 of any size can be reliably fixed on the outer peripheral surface of the recording drum 1. .

  In this state, as shown in FIG. 16, the clamp arm 6 is swung to the end position by the clamp arm drive motor 50, and the rear end clamp 3 held by the holding pin 76 of the first drive device 7 is moved onto the recording drum 1. Press the rear end of the plate 100. In this case, as shown in FIG. 7A, the second clamp bolt 34 of the rear end clamp 3 is inserted into the clamp groove 11 of the recording drum 1, and the plate 100 is moved by one side of the clamp body 30. Pressed.

  Next, the clamp bolt drive motor 71 of the first drive device 7 of FIG. 10 is rotated, and the clamp bolt connecting plate 31 of the rear end clamp 3 is slid by the drive pin 75, as shown in FIG. The second clamp bolt 34 is fixed in the clamp groove 11 of the recording drum 1 by the protrusion 34a. At the same time, the holding pin 76 of the first driving device 7 in FIG. 10 moves to the circular portion of the holding hole 40 of the rear end clamp 3, and the rear end clamp 3 is released from the first driving device 7.

  Thereafter, as shown in FIG. 17, the clamp arm 6 is returned to the origin position by the clamp arm drive motor 50. Accordingly, the rear end clamp 3 is removed from the first drive device 7. As a result, the rear end of the printing plate 100 is fixed to the outer peripheral surface of the recording drum 1 by the rear end clamp 3. In this way, the printing plate 100 is fixed to the outer peripheral surface of the recording drum 1, and drawing is performed on the printing plate 100 by the recording head 8 of FIG.

  When drawing of the printing plate 100 by the recording head 8 is completed, the trailing end clamp 3 is moved to the position p3 of the holding pin 76 of the first driving device 7 shown in FIG. Stop rotating. Further, the squeegee driving motor 54 presses the squeegee roller 58 against the printing plate 100 on the outer peripheral surface of the recording drum 1. Then, the clamp arm driving motor 50 swings the clamp arm 6 to the end position shown in FIG.

  As shown in FIG. 10, the drive pin 75 of the first drive device 7 is inserted into the engagement hole 32 a of the engagement member 32 of the rear end clamp 3 and the holding pin 76 is inserted into the holding hole 40 of the rear end clamp 3. Then, the drive pin 75 slides together with the clamp bolt connecting plate 31 by the clamp bolt drive motor 71, and the second clamp bolt 34 rotates. Thereby, the second clamp bolt 34 is released from the clamp groove 11 of the recording drum 1. At the same time, the holding pin 76 of the first driving device 7 moves to the narrow portion of the holding hole 40 of the rear end clamp 3. Thereby, the rear end clamp 3 is held by the first driving device 7.

  In this state, when the clamp arm 6 is swung to the original position by the clamp arm drive motor 50, the rear end clamp 3 is lifted while being held by the first drive device 7 as shown in FIG. The rear end of 100 is opened.

  Further, the printing plate 100 is carried out by the transport unit 9 shown in FIG. 2 while the recording drum 1 rotates in the direction opposite to that shown in FIG.

  As shown in FIG. 18, when the leading end clamp 2 reaches the position p4 of the cam 65 due to the rotation of the recording drum 1, the rotation of the recording drum 1 is stopped. In this state, the cam 65 is rotated by the cam drive motor 63 and presses one side of the tip clamp 2. Thereby, the front end of the printing plate 100 is released from the front end clamp 2.

  Further, the squeegee driving motor 54 separates the squeegee roller 58 from the outer peripheral surface of the recording drum 1. In this case, the squeegee roller 58 is also separated from the adhesive roller 57. Thereafter, the printing plate 100 is carried out to the outside through the second conveyance path 92 of the conveyance unit 9.

  FIG. 19 is a cross-sectional view showing another example of the rear end clamp 3. As shown in FIG. 19, an inner edge portion 13 that protrudes inward is provided at the upper end of one side surface of the clamp groove 11 formed in the recording drum 1. On the outer peripheral surface of the second clamp bolt 34 of the rear end clamp 3, a projecting portion 34a projecting to one side is provided. The configuration of the other part of the rear end clamp 3 in FIG. 19 is the same as the configuration of the rear end clamp 3 in FIGS.

  As shown in FIG. 19A, when the protrusion 34 a of the second clamp bolt 34 is positioned parallel to the clamp groove 11, the protrusion 34 a does not engage with the inner edge 13 of the clamp groove 11. In this case, the rear end clamp 3 can be detached from the recording drum 1. On the other hand, as shown in FIG. 19B, when the protrusion 34 a of the second clamp bolt 34 is positioned perpendicular to the clamp groove 11 of the recording drum 1, the protrusion 34 a is the inner edge 13 of the clamp groove 11. Engage with. Thereby, the rear end clamp 3 is fixed to the recording drum 1.

  When the rear end clamp 3 shown in FIG. 19 is used, the rear end of the printing plate 100 is placed on the recording drum even when the recording drum 1 rotates at high speed, as in the case where the rear end clamp 3 shown in FIGS. 1 can be reliably fixed to the outer peripheral surface.

  FIG. 20 is a cross-sectional view showing still another example of the rear end clamp 3. As shown in FIG. 20, the clamp groove 11 formed in the recording drum 1 has a rectangular cross section. An elliptical protruding portion 34 b is provided at the lower end of the second clamp bolt 34. The configuration of the other part of the rear end clamp 3 in FIG. 20 is the same as the configuration of the rear end clamp 3 in FIGS.

  As shown in FIG. 20A, when the protruding portion 34 b of the second clamp bolt 34 is positioned in parallel with the clamp groove 11, the rear end clamp 3 can be removed from the recording drum 1. On the other hand, as shown in FIG. 20B, when the protrusion 34 b of the second clamp bolt 34 is positioned perpendicular to the clamp groove 11 of the recording drum 1, both ends of the protrusion 34 b are on the side surfaces of the clamp groove 11. Pressed. Thereby, the rear end clamp 3 is fixed to the recording drum 1.

  When the rear end clamp 3 shown in FIG. 20 is used, the rear end of the printing plate 100 is placed on the recording drum even when the recording drum 1 rotates at high speed, as in the case where the rear end clamp 3 shown in FIGS. 1 can be reliably fixed to the outer peripheral surface.

  As described above, in the drawing apparatus of this embodiment, the plate 100 having an arbitrary size can be reliably fixed on the outer peripheral surface of the recording drum 1 by the front end clamp 2 and the rear end clamp 3. The plate 100 is not displaced or disengaged even during high-speed rotation of 1.

  Further, the front end of the printing plate 100 can be fixed by the front end clamp 2 and the rear end of the printing plate 100 can be fixed and released easily by the rear end clamp 3 by using the first driving device 7 of the clamp driving device 5. Furthermore, the tip clamp 2 can be easily released using the second drive device 62 of the clamp drive device 5.

  Further, the squeegee device 53 can uniformly bring the printing plate 100 into close contact with the outer peripheral surface of the recording drum 1, and transfer dust or the like adhering to the surface of the printing plate 100 to the adhesive roller 57 via the squeegee roller 58. Can do. In addition, when the squeegee roller 58 is separated from the outer peripheral surface of the recording drum 1, the squeegee roller 58 is also separated from the adhesive roller 57, so that dust transferred to the adhesive roller 57 is transferred again to the squeegee roller 58. Is prevented.

  In this embodiment, the rear end clamp 3 is fixed to the outer peripheral surface of the recording drum 1 by a groove extending in the circumferential direction. However, a plurality of concave portions formed in the circumferential direction may be used.

It is a schematic plan view of the drawing apparatus in one Example of this invention. It is a schematic side view of the drawing apparatus of FIG. FIG. 2 is a perspective view of a recording drum in the drawing apparatus of FIG. 1. It is a disassembled perspective view of the front-end | tip clamp in the drawing apparatus of FIG. It is a side view of the front-end | tip clamp in the drawing apparatus of FIG. It is a disassembled perspective view of the rear end clamp in the drawing apparatus of FIG. It is a partial cross section figure of the longitudinal direction of the rear end clamp in the drawing apparatus of FIG. It is sectional drawing of the width direction of the rear end clamp in the drawing apparatus of FIG. FIG. 2 is a cross-sectional view of a state before the rear end clamp is held in the first drive device of the drawing apparatus of FIG. 1 and a plan view of the rear end clamp. FIG. 2 is a cross-sectional view of a state in which a rear end clamp is held in a first driving device of the drawing apparatus of FIG. 1 and a plan view of the rear end clamp. It is a side view which shows the structure of the clamp drive device in the drawing apparatus of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is a side view which shows operation | movement of the clamp drive device of FIG. It is sectional drawing which shows the other example of a rear end clamp. It is sectional drawing which shows the further another example of a rear end clamp. It is a perspective view of the recording drum in the conventional drawing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording drum 2 Front end clamp 3 Rear end clamp 4 Rotation drive device 5 Clamp drive device 6,600 Clamp arm 7 1st drive device 8 Recording head 11 Clamp groove 20 Clamp body 21 Rotating shaft 22 Bearing 24 Metal ball 25 Spring 26 Holding rubber DESCRIPTION OF SYMBOLS 30 Clamp main body 31 Clamp bolt connecting plate 32 Engagement member 32a Engagement hole 33 1st clamp bolt 34 2nd clamp bolt 34a, 34b Projection part 36 Leaf spring 37 Spring 40 Holding hole 53 Squeeze device 54 Squeeze drive motor 57 Adhesive roller 58 Squeeze roller 62 Second drive device 63 Cam drive motor 70 Drive device body 71 Clamp bolt drive motor 72 Drive member 75 Drive pin 76 Holding pin 78 Release pin

Claims (3)

A cylindrical drum having a rotating shaft and having a sheet-like recording material mounted on the outer peripheral surface;
Rotation drive means for rotating the drum around the rotation axis;
A fixing member provided on the outer peripheral surface of the drum and fixing the recording material on the outer peripheral surface of the drum;
A drawing means for drawing an image by irradiating light in accordance with an image signal to the surface of the recording material fixed on the outer peripheral surface of the drum;
A first roller disposed along the outer peripheral surface of the drum in parallel with the rotation axis of the drum and for pressing the recording material onto the outer peripheral surface of the drum by contacting the surface of the recording material When,
A second roller disposed along the first roller, in contact with the first roller when the recording material is pressed, and to which dust from the first roller is transferred ;
When the recording material is pressure-bonded onto the outer peripheral surface of the drum, the first roller is moved to a position in contact with the surface of the recording material and the second roller on the outer peripheral surface of the drum, and the drum Roller moving means for moving the first roller to a position away from the outer peripheral surface of the drum and the second roller when the recording material is not loaded on the outer peripheral surface of the drum. Drawing device to do. A cylindrical drum having a rotating shaft and having a sheet-like recording material mounted on the outer peripheral surface;
Rotation drive means for rotating the drum around the rotation axis;
A fixing member provided on the outer peripheral surface of the drum and fixing the recording material to the outer peripheral surface of the drum;
A drawing means for drawing an image by irradiating light according to an image signal to the surface of the recording material fixed on the outer peripheral surface of the drum;
When fixing the recording material to the outer peripheral surface of the drum, the squeegee roller Ru is crimped to the recording material on the outer peripheral surface of the drum by contacting the surface of the recording material,
In contact with the squeegee roller Rutoki by crimping the recording material, and the adhesive roller dust of the squeegee roller is transferred,
When fixing the recording material on the outer peripheral surface of the drum, the squeegee roller is moved to a position in contact with the surface of the recording material and the adhesive roller on the outer peripheral surface of the drum, and on the outer peripheral surface of the drum And a roller moving means for moving the squeegee roller to a position away from the outer peripheral surface of the drum and the adhesive roller when the recording material is not attached to the drawing apparatus. A cylindrical drum having a rotating shaft and having a sheet-like recording material mounted on the outer peripheral surface;
Rotation drive means for rotating the drum around the rotation axis;
A fixing member provided on the outer peripheral surface of the drum and fixing the recording material to the outer peripheral surface of the drum;
A drawing means for drawing an image by irradiating light in accordance with an image signal to the surface of the recording material fixed on the outer peripheral surface of the drum;
When unloading the recording material from the peripheral surface of the drum, the squeegee roller Ru is crimped to the recording material on the outer peripheral surface of the drum by contacting the surface of the recording material,
In contact with the squeegee roller Rutoki by crimping the recording material, and the adhesive roller dust of the squeegee roller is transferred,
When the recording material is not mounted on the outer peripheral surface of the drum, the squeegee roller is moved to a position away from the outer peripheral surface of the drum and the adhesive roller, and the recording material is carried out from the outer peripheral surface of the drum. And a roller moving means for moving the squeegee roller to a position in contact with the surface of the recording material on the outer peripheral surface of the drum and the adhesive roller .

Images