JP6161032B2 - Squeegee exchange assist device for rotary screen printer - Google Patents

Description

  The present invention relates to a squeegee exchange assist device for a rotary screen printing machine that performs screen printing using a cylindrical rotary screen plate.

  2. Description of the Related Art Conventionally, a rotary screen printing machine using a rotary screen device is known as a high-speed printing device for printing materials made of a wide range of materials such as cloth and paper. The rotary screen printer has a printing method in which ink is pushed out by a squeegee from a through-hole formed in a plate surface of a cylindrical screen plate, and the pushed ink is transferred to a substrate.

  Generally, in a rotary screen printing machine, the squeegee has a squeegee body (blade) for extruding ink and a support (squeegee bar) for supporting the blade. In the rotary screen, both ends of the squeegee bar are fixed to the squeegee support means. In addition, what attached the end ring as a supporting member to the both ends of the screen plate formed in the cylindrical shape is called a rotary screen.

  Conventionally, in such a rotary screen printing machine, a hoist that lifts and lowers the squeegee while supporting the squeegee is known as a squeegee exchange assist device when exchanging a squeegee having a total length of 2 to 3 m and a weight of 13 to 20 kg. (For example, refer to Patent Document 1). In Patent Document 1, a hoist is installed outside the machine frame, and a rotary screen is extended in the axial direction and one end is supported on the machine frame side, and the other end is supported by the post to guide the hoist. A configuration is disclosed in which a squeegee is inserted into and removed from the rotary screen through a side end opening of the rotary screen by an axial movement along the guide rail of the hoist.

JP 2010-194988 A Special table 2009-160741

  However, in the invention described in Patent Document 1 described above, the hoist support device is installed on the outside of the machine frame, which obstructs the confirmation work and maintenance work of the printing press and reduces the workability of these work. There is a fear.

  In view of the above, an object of the present invention is to provide a squeegee replacement assisting device for a rotary screen printing machine that does not impair the workability of the confirmation and maintenance work of the printing machine.

  A squeegee replacement assisting device for a rotary screen printing machine according to the present invention for solving the above-mentioned problems is a machine frame that supports a squeegee, the inside of a screen plate formed in a cylindrical shape and the screen plate. In a squeegee exchange assisting device for a rotary screen printing machine that is guided between the outside and the hoist, a hoist that supports the squeegee movably in the radial direction of the screen plate, and a base end side that is supported by the machine frame and a free end A side that supports the hoist, the free end side is a first position where the hoist is close to the machine frame, and a second position where the distance from the hoist to the machine frame is longer than the axial length of the squeegee A telescopic guide that is movable in the axial direction of the screen plate so as to be positioned at And butterflies.

  The hoist is movable in the first position so as to be movable between a hoist operation position that covers a part of the side end opening of the screen plate and a hoist retreat position that opens the side end opening of the screen plate. It is supported by a guide.

  In addition, the hoist includes a squeegee support part that supports the squeegee supported by the main body part of the hoist so as to be movable along the main body part, and a support part drive unit that moves the squeegee support part. And

  The squeegee includes a blade and a squeegee bar having a rectangular portion having a rectangular cross section, and the squeegee support portion closes a rectangular recess into which the rectangular portion of the squeegee bar is fitted, and an opening of the rectangular recess. And a fixing member for fixing the squeegee bar to the squeegee support portion.

  According to the squeegee exchange auxiliary device for a rotary screen printing machine according to the present invention, it is possible to easily perform confirmation work, adjustment work, and maintenance work for the rotary screen printing machine.

It is explanatory drawing which shows the rotary screen printing machine which concerns on embodiment of this invention. FIG. 2 is a plan development view of FIG. 1. It is explanatory drawing which shows the relationship between the flame | frame and sub-frame in the rotary screen printing machine which concerns on embodiment of this invention. It is explanatory drawing which shows the squeegee support member of the rotary screen printing machine which concerns on embodiment of this invention. It is explanatory drawing explaining the movement of the slide rail of the squeegee exchange assistance apparatus of the rotary screen printing machine which concerns on embodiment of this invention. It is a side view which shows the principal part of the hoist of the squeegee exchange auxiliary | assistance apparatus of the rotary screen printing machine which concerns on embodiment of this invention. It is a front view which shows the principal part of the hoist of the squeegee exchange assistance apparatus of the rotary screen printing machine which concerns on embodiment of this invention. It is a top view which shows the principal part of the hoist of the squeegee exchange assistance apparatus of the rotary screen printing machine which concerns on embodiment of this invention. It is explanatory drawing explaining the movement of the squeegee and the movement of a hoist of the rotary screen printing machine which concerns on embodiment of this invention. It is a block diagram which shows the structure of the rotary screen printing machine which concerns on embodiment of this invention.

  Hereinafter, a rotary screen printer according to an embodiment of the present invention will be described in detail with reference to the drawings. The rotary screen printing machine according to the present embodiment is not limited to the configuration shown below, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

  As shown in FIGS. 1 and 2, in the present embodiment, the rotary screen printing machine includes an impression cylinder 100 and a rotary screen device 200.

  The impression cylinder 100 is rotatably supported between the left and right machine frames 101 and 101. Although not shown, the impression cylinder 100 is formed with a notch along the axial direction of the impression cylinder 100 on the outer peripheral surface thereof. A plurality of notches are formed at equal intervals along the circumferential direction of the impression cylinder 100 (for example, two locations in the present embodiment). A notch gripping device (holding portion) (not shown) that holds and holds the leading end of the sheet as the printed material is provided in the notch.

  On the other hand, the rotary screen device 200 includes a rotary screen 201 and a squeegee 213.

<Rotary screen>
As shown in FIG. 2, the rotary screen 201 includes a screen plate 201A and ring-shaped end rings 201B and 201B fixed to both ends (left and right in FIG. 2) of the screen plate 201A. The screen plate 201A is a cylindrical body made of a thin plate material obtained by etching a small hole corresponding to a pattern, and the end ring 201B is a member for reinforcing the screen plate 201A.

  Here, the end ring 201B includes a protrusion (not shown) (hereinafter referred to as an end ring-side protrusion) and a plurality of (not shown) cutouts (hereinafter referred to as an end ring-side notch). A pin groove not to be formed is formed. The end ring side protrusion is an end opposite to the screen plate 201A with respect to the axial direction of the end ring 201B, and is a flange protruding radially outward on the outer peripheral surface thereof. A plurality of end ring side notches are provided at equal intervals in the circumferential direction. The pin groove is provided between the end ring side notches adjacent to the end ring side protrusion, and is cut out in a U shape from the outer peripheral surface of the end ring side protrusion toward the axis. The end ring 201B is supported by the support member 202.

  In addition, the support member 202 is formed with a plurality of protrusions (two in the present embodiment) (hereinafter referred to as support member side protrusions) (not shown) and a pin (not shown). The support member-side protruding portion is on the end ring 201B side with respect to the axial direction of the support member 202 and protrudes radially inward on the inner peripheral surface thereof, and is equally spaced in the circumferential direction (same as the end ring-side notch portion). (Interval). In addition, the shape of the projecting portion on the support member side is set so that the end ring side notch portion can be passed in the axial direction. Further, the pin is fixed to the one projecting member side protruding portion so as to engage with the pin groove of the end ring 201B when the end ring 201B is attached to the support member 202.

  When attaching the end ring 201B to the support member 202, the rotary screen 201 is moved in the axial direction with the end ring side notch portion of the end ring 201B and the circumferential position of the support member side protruding portion of the support member 202 aligned. The end ring 201B is inserted into the hollow portion of the support member 202, and the support member side protrusion and the pin are positioned inside the end ring side protrusion as viewed in the axial direction. Subsequently, the rotary screen 201 is rotated with respect to the support member 202, the circumferential positions of the pin grooves of the end ring 201 </ b> B and the pins of the support member 202 are aligned, and then the rotary screen 201 is pivoted with respect to the support member 202. The pin of the support member 202 is engaged with the pin groove of the end ring 201B. As a result, the end ring side protrusion and the support member side protrusion overlap each other in the circumferential direction, preventing the rotary screen 201 from being detached from the support member 202, and the pin groove of the end ring 201B and the support member 202. The movement of the rotary screen 201 with respect to the support member 202 is restricted in a state where the phase of the rotary screen 201 with respect to the support member 202 is accurately matched (the state where the top and bottom are aligned) by the engagement with the pins of the rotary screen. 201 can be supported by the support member 202.

  When the end ring 201B is removed from the support member 202, first, the rotary screen 201 is moved outward (on the support member 202 side) in the axial direction, and the pin groove of the end ring 201B and the pin of the support member 202 are engaged. And the pin of the support member side protrusion and the pin of the support member 202 are positioned inward with respect to the end ring side protrusion in the axial direction. Subsequently, since the end ring side protrusion and the support member side protrusion are overlapped in the circumferential direction, the rotary screen 201 is rotated with respect to the support member 202, and the end ring side notch and The rotary screen 201 is moved in the axial direction in a state where the circumferential positions of the support member side protrusions are matched. Accordingly, the end ring 201B (rotary screen 201) can be detached from the support member 202.

  The rotary screen 201 according to this embodiment configured as described above includes a rotary screen rotation driving device, a rotary screen left / right registration adjusting device, and a rotary screen attaching / detaching device.

<Rotary screen rotation drive device and rotary screen left / right registration adjustment device>
Hereinafter, the rotary screen rotation driving device and the rotary screen left / right registration adjusting device of the rotary screen printing machine according to the present embodiment will be described with reference to FIGS. 1 to 3.

  In the present embodiment, the rotary screen rotary drive device that rotationally drives the rotary screen 201 at both ends thereof, the drive motor 209 shown in FIGS. 1 and 2, gears 209a, 205a, 206a, 208, 202a, and the rotary shaft 205 206, a connecting member 207, and a clutch 210. Further, the rotary screen left / right registration adjusting device is provided in a subframe 204 to which the drive motor 209 is fixed and swingably supported by the machine frames 101, 101 of the impression cylinder 100. Two rotary screen brackets 203 that are slidably supported along the axial direction of the screen 201 and rotatably support both ends of the rotary screen 201 in the axial direction, and can be freely rotated by the rotary screen bracket 203. Rotating shafts 205 and 206 to be supported, a rotary screen position adjusting motor 211 and a tension cylinder 212 disposed in the sub-frame 204 are provided.

Describing in more detail with reference to FIG. 2, the sub-frame 204 is formed in a box shape, and its longitudinal direction extends along the axial direction of the rotary screen 201. The subframe 204 is disposed in the vicinity of the rotary screen 201 and the impression cylinder 100.
As shown in FIG. 3, first coupling brackets 204 a are formed at the base ends of both ends in the axial direction of the subframe 204, and the coupling frame provided on the machine frame 101 that supports the impression cylinder 100 is formed. A first connecting bracket 204a is swingably connected to the bracket 101a via a pin 214.

  As shown in FIG. 2, the rotary screen bracket 203 has a distal end portion constituting a rotary screen support portion 203a and a proximal end portion constituting a rotary shaft support portion 203b. The rotary screen support 203a has a through hole, and the above-described support member 202 is rotatably supported in the through hole. On the other hand, the rotating shaft support portion 203b is formed in a frame shape, and a through hole is formed in a surface orthogonal to the axial direction. The rotary shafts 205 and 206 extending in parallel to the axial direction are rotatably supported in the through holes of the rotary shaft support portion 203b of the rotary screen bracket 203 on both sides in the axial direction. Further, the rotary shaft support portions 203b are slidably supported by rails (not shown) extending in the subframe 204 along the axial direction of the rotary screen 201.

  Here, the rotary shaft 205 and the rotary shaft 206 are connected to each other via a cylindrical connecting member 207 so as to be integrally rotatable and relatively movable in the axial direction. That is, one end of the rotating shaft 205 is inserted and fixed to one end side of the connecting member 207. On the other hand, splines are respectively formed on the inner peripheral surface on the other end side of the connecting member 207 and the outer peripheral surface on one end side of the rotating shaft 206, and the splines formed on these connecting members 207 and one end side of the rotating shaft 206 are formed. One end side of the rotating shaft 206 is inserted into the other end side of the connecting member 207 so that the formed spline is engaged.

A gear 205a is formed on the other end of the rotating shaft 205, and a gear 202a is formed on the outer peripheral surface of one of the support members 202 (right side in FIG. 2). The gear 205a of the rotating shaft 205 and the gear 202a of one support member 202 are engaged with each other via the intermediate gear 208, and the gear 205a of the rotating shaft 205 and the gear 209a of the driving motor 209 are engaged with each other ( (See FIG. 1).
Further, a gear 206a is formed on the other end of the rotating shaft 206 via a clutch 210, and a gear 202a is formed on the outer peripheral surface of the other (left side in FIG. 2) support member 202. The gear 206 a of the rotating shaft 206 and the gear 202 a of the other support member 202 are engaged with each other via the intermediate gear 208.

  Further, the rotary shaft support portion 203b of one of the rotary screen brackets 203 (right side in FIG. 2) is configured to be movable in the axial direction by a rotary screen position adjusting motor 211. That is, a screw 211 b is formed at the tip of the drive rod 211 a that is rotated by driving the rotary screen position adjusting motor 211. On the other hand, a block 239 formed with a female screw to be screwed into the screw 211b is fixed to the one rotary shaft support portion 203b, and the screw 211b is screwed to the block 239. As a result, when the screw 211b rotates as the rotary screen position adjusting motor 211 is driven, one of the rotary shaft support portions 203b (rotary screen bracket 203) extends in the above-described subframe 204 (not shown). It moves to the axial direction along. The rotary screen position adjusting motor 211 is driven by operating the screen plate left / right position adjusting switch 308 (see FIG. 5) to adjust the left / right (axial direction) position of the screen plate 201A. The screen plate left / right position adjustment switch 308 includes, for example, a left button and a right button, and a format for adjusting the left / right (axial direction) position of the screen plate 201A according to these operations, or a format for inputting a movement direction and a movement amount Or the like.

  In addition, the tip of the tension cylinder 212 is brought into contact with the rotary shaft support portion 203b of the other (left side in FIG. 2) rotary shaft bracket 203 on a surface orthogonal to the axial direction. The tension cylinder 212 applies tension so as to extend the rotary screen 201 in the axial direction, and presses the other rotary screen bracket 203 to the opposite side of the one rotary screen bracket 203. Is set to Thereby, the rotary screen 201 is always in a state where tension is applied in the axial direction thereof.

<Rotary screen attachment / detachment device>
Next, a rotary screen attaching / detaching device for a rotary screen printing machine according to the present embodiment will be described with reference to FIGS. 1 and 3.
As shown in FIG. 1, in this embodiment, the rotary screen attaching / detaching device includes the above-described subframe 204 and rotary screen bracket 203, and first, second, and third link members 222, 224, and 227 on the subframe 204. And a rotary screen attaching / detaching cylinder 228 connected to each other.

  1 and FIG. 3, the first link member 222 is swingably connected to the second connection bracket 204b formed at both ends in the axial direction of the subframe 204 via the pins 223. ing. The first link member 222 is connected to the free end portion of the second link member 224 via a pin 225 so as to be swingable. A base end portion of the second link member 224 is fixed to the rotation shaft 226.

  Here, the first link member 222 and the second link member 224 are disposed inside the left and right machine frames 101, respectively. The rotary shaft 226 passes through the machine frame 101 and is arranged so that its axial direction is parallel to the axial direction of the rotary screen 201, and at least one end (left side in FIG. 3) is the machine frame 101 of the impression cylinder 100. Protrudes outside.

  Then, on the outer side of the machine frame 101, the base end portion of the third link member 227 is fixed to the one end of the rotating shaft 226. The free end of the third link member 227 is connected to the drive rod 228a of the screen plate attaching / detaching cylinder 228 via a pin 229 so as to be swingable. The main body of the screen plate attaching / detaching cylinder 228 is swingably connected to the machine frame 101 via a pin 230. Further, a stopper 237 for restricting the swing of the sub frame 204 toward the impression cylinder 101 is disposed on the side surface of the third link member 227 so as to face the side surface.

<Squeegee>
As shown in FIGS. 1 and 2, the squeegee 213 includes a blade 213 </ b> A and a squeegee bar 213 </ b> B and is inserted into the rotary screen 201. The blade 213A is a member for supplying the ink inside the screen plate 201A to the impression cylinder 100 through the small holes of the screen plate 201A, in other words, a squeegee body. The squeegee bar 213B is a support that supports the blade 213A, has a rectangular section with a rectangular cross section, and includes three reference pins 501, 502, and 503 on one end side (left side in the present embodiment) of the rectangular section. . In the rotary screen printing machine, the tip of the blade 213A is in sliding contact with the inner peripheral surface of the screen plate 201A, so that the ink supplied into the screen plate 201A is transferred to the printing surface of the printing material through the small holes. It has become. The reference pins 501 and 502 are provided as a reference for setting the squeegee 213 on a squeegee support member 219 described later. The reference pin 503 is provided as a reference for setting the squeegee 213 on the hoist 402 described later.

  The rotary screen printing machine according to the present embodiment configured as described above includes a squeegee position adjusting device and a squeegee replacement assisting device.

<Squeegee position adjustment device>
A squeegee position adjusting device for a rotary screen printing machine according to the present embodiment will be described with reference to FIGS. 1, 2, 4, and 9.

  As shown in FIGS. 1 and 2, in this embodiment, the squeegee position adjusting device swings to the squeegee attaching / detaching cylinder 215 that is swingably supported by the subframe 204, and swings to the subframe 204 and the squeegee attaching / detaching cylinder 215. A support plate 217 that is freely supported, a squeegee support member 219 that is rotatably supported by the support plate 217, an eccentric sleeve 221 that is also rotatably supported by the support plate 217, and a support plate 217. And a squeegee angle adjusting motor 238.

  The squeegee attaching / detaching cylinder 215 is a two-stage cylinder, and a base end portion of the squeegee attaching / detaching cylinder 215 is swingably supported by third connecting brackets 204c formed at both axial ends of the subframe 204. More specifically, a pin 216 is fixed to the third connecting bracket 204c, and a base end portion of the squeegee attaching / detaching cylinder 215 is pivotally supported by the pin 216 so as to be swingable.

  The support plate 217 is a plate body, and an arcuate cutout portion formed by cutting out the corner in an arc shape is formed at one corner thereof, and the squeegee support member 219 is rotatable in the arcuate cutout portion. It is supported. Further, the other squeegee attaching / detaching cylinder 215 is swingably connected to the other corner of the support plate 217 via a pin 218, and an eccentric sleeve 221 is rotatably supported at the other corner. An abutting surface 217 a that abuts on a screw 236 serving as a stopper that restricts the rotation of the support plate 217 toward the impression cylinder 100 is formed.

  The squeegee support member 219 is a member that detachably holds the squeegee bar 213B. The squeegee support member 219 is opposed to the squeegee support part 219A formed in a substantially semicircular shape having a curved surface part and a flat part, and the flat part of the squeegee support part 219A. A pressing plate 219B is provided, and a handle 219C fixed to one end of the pressing plate 219B.

A worm wheel 235 (see FIG. 4) is provided on the curved surface portion of the squeegee support portion 219 </ b> A, and a worm 234 that meshes with the worm wheel 235 is supported by the support plate 217. A squeegee angle adjusting motor 238 is connected to the worm 234. When the squeegee angle adjusting motor 238 is driven, the worm 234 rotates, and the squeegee support member 219 is moved along the arc-shaped notch through the worm gear. It is configured to rotate about the rotation center P _2.
The squeegee angle adjusting motor 238 adjusts the angle of contact of the squeegee 213 with respect to the screen plate 201A (hereinafter referred to as squeegee angle) by a squeegee angle adjustment switch 311 (see FIG. 10) during printing. Further, when the squeegee 213 is removed at the time of replacement or the like, the squeegee support member 219 is automatically driven together with the squeegee attaching / detaching cylinder 215 to position the squeegee support member 219 at a predetermined angle suitable for replacement of the squeegee 213 (replacement angle).
Here, for example, the squeegee angle adjustment switch 311 may be of a form in which a plus button and a minus button are provided and operated, or a form of numerically inputting an angle. In the present embodiment, the worm 234 is rotated using the squeegee angle adjusting motor 238. However, the worm 234 is manually rotated, and the squeegee support member 219 is cut out in an arc shape through the worm gear. it may be rotated about the rotation center P ₂ along the section.

  A rectangular groove (rectangular recess) having a rectangular cross section that fits into the squeegee bar 213B is formed at the center of the flat portion of the squeegee support portion 219A. Further, as shown in FIG. 4, the holding plate 219B has a base end portion rotatably supported by a pin 219D fixed to the squeegee support portion 219A, and a rectangular groove opening as shown by a solid line in FIG. It can be positioned at a fixed position that covers the part and an open position that opens the rectangular groove as shown by a two-dot chain line in FIG. Further, a pin 219E having a handle 219C fixed at one end and a screw formed at the other end is screwed into the squeegee holding portion 219A, and a notch 219Ba engaged with the pin 219E is engaged with the free end portion of the holding plate 219B. Is formed. With this configuration, by rotating the handle 219C, the holding plate 219B is clamped and fixed between the flat surface portion of the squeegee holding portion 219A and the lower end surface of the handle 219C by the action of the screw of the pin 219E. The clamping can be released.

In this embodiment, during printing, as shown in FIG. 1, the center P ₁ of the rotary screen 201, the rotation center P _{2 of} the squeegee 213 (squeegee support member 219), the tip of the blade 213A, and the screen plate 201A The position of the support plate 217 and the angle of the squeegee support member 219 are set so that the contact point P ₃ is positioned on a straight line (L ₁ shown in FIG. 1).

The eccentric sleeve 221 is pivotally supported by pins 220 that are supported by the support plate 217 so as to be rotatable and are fixed to fourth connection brackets 204d formed at both ends of the subframe 204 in the axial direction. ing. A long hole 221a is formed in the flange portion of the eccentric sleeve 221, and a pin 221b fixed to the support plate 217 is fitted into the long hole 221a.
The eccentric sleeve 221 is arranged such that the tip of the blade 213A moves on the tangent L ₂ at the contact point P ₃ of the impression cylinder 100 via the support plate 217 during printing, in other words, the center of rotation of the eccentric sleeve 221. The support plate 217 is eccentric with respect to P ₄ so as to be aligned parallel to the tangent L ₂ . That is, when the eccentric sleeve 221 is rotated, the support plate 217 is translated along the tangent line L ₂ by the eccentric action of the eccentric sleeve 221, so that the tip of the blade 213 A supported by the support plate 217 is on the tangent line L ₂ . To move.

Here, the axis of the pin 220 in the present embodiment, i.e. the rotational center P ₄ of the eccentric sleeve 221 is disposed on the tangential line L _2, the abutment surface 217a that abuts the screw 236 of the support plate 217 described above It is disposed at a position that is flush with the tangent line L ₂ . However, the abutment surface 217a is not necessarily provided at a position to be the tangent line L ₂ flush may be a parallel plane contact and the tangent L ₂ to the eccentric pin 236.

  The screw 236 described above is screwed into the fifth connecting bracket 204e fixed to the subframe 204. The tip of the screw 236 protrudes from the fifth connecting bracket 204e toward the abutting surface 217a, and is configured to adjust the pressing force of the blade 213A against the impression cylinder 100 during printing by the protruding amount of the screw 236. ing. Here, the protrusion amount of the screw 236 may be adjusted by directly turning the screw 236 by an operator, or the screw 236 is rotated by remote operation with the screw 236 meshed with a motor gear (not shown). May be adjusted.

<Squeegee exchange assist device>
Next, the squeegee replacement assisting device for the rotary screen printer according to the present embodiment will be described with reference to FIGS. 1 to 2 and FIGS. 5 to 9.
As shown in FIG. 1 and FIG. 2, in this embodiment, the squeegee replacement assisting apparatus 400 includes a slide rail 401 as an extendable guide, and a hoist 402 that is rotatably supported by the slide rail 401 via a hinge 403. It has.
The slide rail 401 extends along the axial direction of the rotary screen 201 and is supported by the left and right machine frames 101 above the rotary screen 201. The slide rail 401 includes a fixed rail 411, an intermediate rail 412, and a movable rail 413.

  The fixed rail 411 is fixed to the left and right machine frames 101. The intermediate rail 412 is supported by the fixed rail 411 so as to be slidable in the axial direction of the rotary screen 201. The movable rail 413 is supported by the intermediate rail 412 so as to be slidable in the axial direction of the rotary screen 201. In other words, the intermediate rail 412 is slidably connected to both the fixed rail 411 and the movable rail 413, and the slide rail 401 functions as an extensible / contractible guide.

  As shown in FIG. 5, the slide rail 401 is set such that the length that is extended by moving the intermediate rail 412 and the movable rail 413 is longer than the axial length of the squeegee bar 213B. More specifically, the slide rail 401 includes a first position (a position indicated by a two-dot chain line in FIG. 5) that is a position of a hoist 402 described later in a state where the fixed rail 411, the intermediate rail 412, and the movable rail 413 overlap. The intermediate rail 412 and the movable rail 413 are extended and the distance from the hoist 402 to the machine frame 101 is longer than the axial length of the squeegee bar 213B (the position indicated by the solid line in FIG. 5). It is possible to guide the hoist 402 between them. The slide rail 401 is a guide rail that has the same configuration as the slide rail disclosed in, for example, Patent Document 2 and expands and contracts in the longitudinal direction, and detailed description thereof is omitted here.

  The base end of the hoist 402 is supported at one end (left side in FIG. 2) of the movable rail 413 so as to be rotatable along the side surface of the frame 101 via a hinge 403. The center of swing of the hoist 402 is parallel to the axial direction of the rotary screen 201. As shown in FIGS. 5 to 8, the free end portion of the hoist 402 is movably supported by the main body 450 of the hoist 402 and the squeegee support portion 420 that supports the squeegee 213 and the squeegee support portion 420 are moved. A squeegee support unit driving device 430 as a support unit driving means and a handle 440 are provided.

  The squeegee support part 420 includes a plate 421, an L-shaped member 422, screws 423 and 424, fixing plates 425 and 426 as fixing members, and handles 427 and 428.

  The plate 421 is a plate-like member and is disposed so as to face one side surface of the rectangular portion of the squeegee bar 213B at the hoist operation position (position indicated by a two-dot chain line in FIG. 9). The L-shaped member 422 is formed in an L-shape so as to face the other side surface and the lower surface of the rectangular portion of the squeegee bar 213B at the hoist work position, and is fixed to the plate 421. That is, in this embodiment, the plate 421 and the L-shaped member 422 form a rectangular groove (rectangular recess) that fits into the rectangular portion of the squeegee bar 213B. The screws 423 and 424 are attached to the upper part of the side wall of the L-shaped member 422 facing the plate 421, and the fixing plates 425 and 426 are arranged at the base end of the L-shaped member 422 on the upper surface of the side wall via screws 423 and 424. And are pivotally connected. Handles 427 and 428 are fixed to the tips of screws 423 and 424.

  Further, the squeegee support part driving device 430 is a means for moving the squeegee support part 420 in the longitudinal direction of the hoist 402 (direction parallel to the radial direction of the screen plate 201A), and includes a guide member 431, a screw shaft 432, A bracket 433 and a handle 434 are provided.

The guide member 431 is formed in a frame shape and is fixed to the main body 450. A plate 421 is slidably in contact with a guide surface 431a which is a surface of the guide member 431 on the squeegee support portion 420 side. The screw shaft 432 extends along the longitudinal direction of the hoist 402, and both ends thereof are rotatably supported by the guide member 431. The bracket 433 includes a female screw that is screwed onto the screw shaft 432 and is attached to the screw shaft 432. The said plate 421 is being fixed to the said bracket 433, Thereby, the bracket 433 and the squeegee support part 420 can move integrally. The handle 434 is fixed to one end (the lower end in FIG. 6) of the screw shaft 432.
The handle 440 is used when the hoist 402 is moved.

  The hoist 402 configured in this manner loosens the fastening between the L-shaped member 422 and the fixing plates 425 and 426 by rotating the handles 427 and 428 fixed to the tips of the screws 423 and 424, or the L-shaped member 422. And the fixing plates 425 and 426 can be fastened. Further, in the state where the fastening between the L-shaped member 422 and the fixing plates 425 and 426 is loosened, the free end portions of the fixing plates 425 and 426 are opened in the rectangular groove of the squeegee support portion 420 as shown by the solid line in FIG. It can be positioned at the fixed position disposed above and the release position disposed at a position that does not overlap the opening of the rectangular groove as indicated by a two-dot chain line in FIG. If the free ends of the fixed plates 425 and 426 are positioned at the fixed position, the squeegee bar 213B attached to the rectangular groove of the squeegee support 420 can be fixed, and the free ends of the fixed plates 425 and 426 are positioned at the release position. Then, the squeegee bar 213B can be removed from the squeegee support part 420, or the squeegee bar 213B can be attached to the squeegee support part 420.

  Further, by operating the handle 434 to rotate the screw shaft 432, the squeegee support portion 420 fixed to the bracket 433 can be moved in the longitudinal direction of the hoist body 450 along the guide surface 431a. For example, in a state where the hoist 402 is positioned at the hoist work position, the squeegee bar 213B supported by the squeegee support portion 420 so that the bottom surface of the rectangular portion is substantially horizontal can be moved in the vertical direction. Note that the handle 434 may be manually rotated or rotated by a motor.

<Control device>
Next, control by the rotary screen printer according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 10, the control device 300 of the rotary screen printing machine according to this embodiment includes a plate exchange switch 301, a plate mounting completion switch 302, a screen plate left / right position adjustment switch 308, a rotary encoder 303, and a print start switch 304. In addition, an operation signal from the counter 305, the print stop switch 306, the squeegee replacement switch 309, the squeegee mounting completion switch 310, and the squeegee angle adjustment switch 311 is input, and a detection signal from the timer 307 is input.

  The control device 300 includes a clutch 210, a rotary screen position adjusting motor 211, a tension cylinder 212, a driving motor 209, a squeegee attaching / detaching cylinder 215, a screen plate attaching / detaching cylinder 228, a squeegee angle adjusting motor 238, and a timer 307. Is driven and controlled.

<Printing>
First, the flow of control during printing by the control device 300 will be described. When printing, when an operation signal of the print start switch 304 is input to the control device 300 and the rotary encoder 303 detects the printing start phase of the first sheet (printed material), the squeegee attaching / detaching cylinder 215 from the control device 300. A command is output to extend the drive rod 215a, and a command is output to the screen plate attaching / detaching cylinder 228 to contract the drive rod 228a. As a result, the entire subframe 204 swings in the direction approaching the impression cylinder 100 around the pin 214 via the third link member 227, the second link member 224, and the first link member 222 (counterclockwise in FIG. 1). The support plate 217 swings around the pin 220 in a direction (counterclockwise in FIG. 1) to bring the blade 213A closer to the inner peripheral surface of the screen plate 201A. Through the plate 217, the rotary screen 201 is moved from the rotary screen removal position where the screen plate 201A is separated from the impression cylinder 100 to the rotary screen attachment position where the screen plate 201A is brought into contact with the impression cylinder 100 (see FIG. 1). Squeegee 2 in the rotary screen 201. 3 is a squeegee wearing position in which the tip of the blade 213A is brought into contact with the inner peripheral surface of the screen plate 201A from the squeegee disengagement position in which the tip of the blade 213A is in the vicinity of the inner peripheral surface of the screen plate 201A and separated from the inner peripheral surface. (Position indicated by a solid line in FIG. 9). The squeegee 213 is positioned at an initial angle by the squeegee support member 219 (an angle of the squeegee support member 219 at the squeegee wearing position, which is set in advance so that the squeegee angle of the new squeegee 213 is optimized). At this time, the contact surface 217 a of the support plate 217 contacts the tip of the screw 236 and is pressed by the urging force of the squeegee attaching / detaching cylinder 215.

Here, when adjusting the squeegee angle, the squeegee angle adjustment switch 311 is operated to drive the squeegee angle adjustment motor 238 by remote control, and the squeegee support member 219 is rotated along the arc-shaped notch. To do. Then, the displacement of the position of the blade 213A tip in the tangential L ₂ direction that occurs at this time is caused by rotating the eccentric sleeve 221 to move the tip of the blade 213A in the tangential L ₂ direction and parallel to the tangent L ₂ (this in the embodiment which is formed at a position where the tangent L ₂ dihedral I) abutment surface 217a is modified by the method comprising: sliding the tangential L ₂ direction in contact with the screw 236. As described above, the pressing force of the blade 213A to the screen plate 201A is adjusted by adjusting the protruding amount of the screw 235.

  Further, when the left and right (axial direction) registration of the screen plate 201A is performed, the screen plate left / right position adjustment switch 308 is operated by an operator. When the screen plate left / right position adjustment switch 308 is operated, the control device 300 outputs a command to the rotary screen position adjustment motor 211 to rotate the drive rod 211a in response to a request from the screen plate left / right position adjustment switch 308. At this time, when one of the rotary screen brackets 203 is moved in a direction away from the other rotary screen bracket 203, the rotary screen 201 is also moved integrally in the axial direction, and the other rotary screen bracket 203 is moved to the rotary screen. It moves in the axial direction following the movement of one of the rotary screen brackets 203 against the urging force of the tension cylinder 212 via 201. On the other hand, when the rotary screen position adjusting motor 211 is driven in the opposite direction, the one rotary screen bracket 203 moves in a direction close to the other rotary screen bracket 203. The movement of the one rotary screen bracket 203 causes the rotary screen 201 to move integrally in the axial direction, and the other rotary screen bracket 203 follows the movement of the one rotary screen bracket 203 by the urging force of the tension cylinder 212. And move in the axial direction. Thereby, the left and right registration of the rotary screen 201 is performed. Note that the left and right registration can be performed during printing or in a printing end state.

  Thereafter, when the printing stop switch 306 is operated or the number of supplied sheets counted by the counter 305 reaches a predetermined number and the rotary encoder 303 detects the final sheet printing completion phase, the control device 300 detects the squeegee attaching / detaching cylinder 215. In addition, a command is output to contract the drive rod 215a, and a command is output to extend the drive rod 228a to the screen plate attaching / detaching cylinder 228. As a result, the support plate 217 swings around the pin 220 in a direction to separate the blade 213A from the inner peripheral surface of the screen plate 201A (clockwise in FIG. 1), and the blade 213A is removed from the squeegee wearing position. A direction in which the entire sub frame 204 moves away from the impression cylinder 100 around the pin 214 via the third link member 227, the second link member 224, and the first link member 222 (clockwise in FIG. 1). And the rotary screen 201 is positioned from the rotary screen attachment position to the rotary screen disengagement position via the rotary screen bracket 203 and the support plate 217, and the printing is completed.

<Screen version replacement>
Subsequently, when performing plate replacement, first, when the operator operates the squeegee replacement switch 309 in the above-described printing end state (the state where the rotary screen device 200 is positioned at the rotary screen disengaged position or the squeegee detached position), the control is performed. The apparatus 300 outputs a command to retract the drive rod 215 a to the squeegee attaching / detaching cylinder 215 and outputs a command to the squeegee angle adjusting motor 238 to set the squeegee support member 219 to the replacement angle. As a result, the support plate 217 swings around the pin 220 in a direction (clockwise in FIG. 1) that separates the blade 213A from the inner peripheral surface of the screen plate 201A, and the squeegee support member 219 is attached to the support plate 217. Since the squeegee 213 is rotated along the arc-shaped notch, the squeegee 213 is retracted from the squeegee detachment position to the axial center side of the rotary screen 201 in the rotary screen 201 (indicated by a two-dot chain line in FIG. 9). The squeegee 213 is positioned from the initial angle to the replacement angle by the squeegee support member 219.

  Subsequently, the handle 219C of the squeegee support member 219 is rotated, and the screw of the pin 219E is loosened to release the holding of the press plate 219B between the flat surface portion of the squeegee support portion 219A and the lower end surface of the handle 219C, and the press plate 219B. Is rotated to release the upper openings of the rectangular grooves of the left and right squeegee support members 219. Thereafter, the hoist 402 is placed in the hoist retracting position (the hoist 402 is arranged so that the hoist 402 does not overlap the opening of the rotary screen 201 in the radial direction, in other words, the side end opening of the screen plate 201A is released. For example, from the position shown by the solid line in Fig. 9 to the hoist work position described above (more specifically, the position near the hoist as the first position where the slide rail 401 is contracted and the hoist 402 is viewed in the axial direction and close to the frame 101) The hoist 402 so that the squeegee support part 420 covers a part of the side end opening of the screen plate 201A, specifically, substantially overlaps the squeegee support member 219 positioned at the squeegee exchange position when viewed in the radial direction. Position). At that time, the squeegee support part 420 is positioned below (squeegee mounting position) than the squeegee 213 supported by the squeegee support member 219. Then, the squeegee support portion 420 is supported by the squeegee support member 219, for example, by the squeegee support portion drive device 430 (specifically, the handle 434 is rotated to rotate the screw shaft 432). From the state positioned below the squeegee 213) to the squeegee removal position (the state where the squeegee support portion 420 is positioned above the squeegee 213 supported by the squeegee support member 219) is raised along the guide surface 431a in the vertical direction. . When the squeegee bar 213B fits into the rectangular groove of the squeegee support part 420, the squeegee support part drive device 430 temporarily stops the squeegee support part 420 from rising, and positions the fixing plates 425 and 426 at the fixed positions. Thereafter, after the handles 427 and 428 are rotated and the squeegee bar 213B is clamped and fixed to the squeegee support part 420, when the squeegee support part 420 is lifted by the squeegee support part driving device 430, the squeegee bar 213B becomes a rectangular shape of the squeegee support member 219. The squeegee bar 213B is transferred from the left and right squeegee support members 219 to the squeegee support portion 420.

  Subsequently, after the squeegee support part drive device 430 raises the squeegee support part 420 (squeegee 213) to a position separated from the squeegee support member 219, the squeegee support part 420 (squeegee 213) is stopped from rising, and the hoist 402 is moved. The hoist separation position (the position where the slide rail 401 is extended and the hoist 402 is separated from the frame 101 when viewed in the axial direction of the rotary screen 201) is moved from the position near the hoist to the second position. When the hoist 402 moves to the hoist separation position, the slide rail 401 guides the hoist 402 while extending.

  Thereafter, when the plate exchange switch 301 is operated, a command is output from the control device 300 to the clutch 210 to disconnect the rotary shaft 206 and a command to contract the drive rod to the tension cylinder 212 is output. Then, the connection between the clutch 210 and the rotary shaft 206 and the pressing of the tension cylinder 212 against the rotary screen bracket 203 are released.

  When the pressure on the rotary screen bracket 203 of the tension cylinder 212 is released by a command from the control device 300, the operator engages the driving member 202 on the operation side (left side in FIG. 2) with the end ring 201 and the driving side ( The engagement between the support member 202 on the right side in FIG. 2 and the end ring 201 is released, and the old plate is removed. The method of removing the end ring 201 (rotary screen 201) from the support member 202 is as described above, and detailed description thereof is omitted here.

  Subsequently, after attaching the end rings 201B to both ends of the new screen plate 201A, the driving side end ring 201B of the new screen plate 201A is attached to the driving side support member 202, and then the operation side support member 202 is axially attached. As a result, the new screen plate 201A is rotated to adjust the phase with the end ring 201B on the operation side of the new screen plate 201A, and the end ring 201B is attached to the support member 202. The method of attaching the end ring 201 (rotary screen 201) to the support member 202 is also as described above, and a detailed description thereof is omitted here.

  When the end ring 201B is attached to the support member 202, the hoist 402 is moved to a position near the hoist. When the hoist 402 moves to a position near the hoist, the slide rail 401 guides the hoist 402 while contracting.

  After the hoist 402 is positioned in the vicinity of the hoist, the squeegee support portion 420 (squeegee 213) is lowered by the squeegee support portion driving device 430, and the squeegee bar 213B is fitted into the rectangular grooves of the left and right squeegee support members 219, then the squeegee support portion is driven. The descent of the squeegee support part 420 (squeegee 213) by the device 430 is temporarily stopped, the handles 427 and 428 of the hoist 402 are rotated to release the holding by the fixing plates 425 and 426, and the rectangular groove opening of the squeegee support part 420 is opened. After the release, when the descent of the squeegee support portion 420 is resumed by the squeegee support portion driving device 430, the squeegee support portion 420 is lowered, and the squeegee bar 213 is removed from the rectangular groove of the squeegee support portion 420. As a result, the squeegee bar 213B is transferred from the squeegee support portion 420 to the left and right squeegee support members 219. Thereafter, the pressing plates 219B of the left and right squeegee support members 219 are rotated to a position where the bottom surface of the notch 219Ba of the pressing plate 219B comes into contact with the pin 219E, and the pressing plate 219B opens the rectangular groove of the squeegee support member 219. And the handle 219C is rotated to fix the squeegee bar 213B in the rectangular grooves of the left and right squeegee support members 219.

  When the squeegee bar 213B is fixed to the squeegee support member 219, the hoist 402 is positioned at the hoist retreat position. Thereafter, when the squeegee attachment completion switch 310 is operated, the controller 300 outputs a command to extend the drive rod 215a to the squeegee attaching / detaching cylinder 215 and supports the squeegee angle adjusting motor 238 to support the squeegee. A command is output to set the member 219 as the initial angle. Accordingly, the support plate 217 swings around the pin 220 in a direction (counterclockwise in FIG. 1) to bring the blade 213A closer to the inner peripheral surface of the screen plate 201A, and the squeegee support member 219 is supported by the support plate 217. Therefore, the squeegee 213 is positioned at the squeegee disengagement position in the rotary screen 201, and the squeegee support member 219 positions the squeegee 213 at the initial angle.

  After that, the plate setting completion switch 302 is turned ON by the operator. When the plate mounting completion switch 302 is operated, a command is output from the control device 300 to extend the drive rod 212a to the tension cylinder 212, the drive motor 209 is turned on, and the time measurement by the timer 307 is started. A command is output to. As a result, tension is applied to the rotary screen 201, and the gear 209a of the drive motor 209, the gear 205a of the rotating shaft 205, one intermediate gear 208, the gear 202a of one support member 202, and the one support member 202. The driving force of the driving motor 209 is transmitted to one end of the rotary screen 201 via the. Further, as the rotary screen 201 rotates, the other support member 202 attached to the other end of the rotary screen 201, the gear 202 a of the other support member 202, and the gear 206 a of the rotary shaft 206 through the other intermediate gear 208. , While the rotation shaft 205 rotates, the rotation shaft 206 rotates. At this time, since the clutch 210 is disconnected from the rotating shaft 206, the gear 206 a of the rotating shaft 206 can be freely rotated with respect to the rotating shaft 206.

  Subsequently, when the timer 307 measures time for a preset first set time, a command is output from the control device 300 to connect the rotating shaft 206 to the clutch 210, and the gear 206a rotates integrally with the rotating shaft 206. So that the drive connection. Accordingly, the gear 209a of the driving motor 209, the gear 205a of the rotating shaft 205, the rotating shaft 205, the connecting member 207, the rotating shaft 206, the clutch 210, the gear 206a of the rotating shaft 206, the other intermediate gear 208, and the other supporting member. The driving force of the driving motor 209 is transmitted to the other end of the rotary screen 201 via the gear 202a of 202 and the other support member 202, and both ends of the rotary screen 201 are rotated by the driving motor 209.

  Then, when the timer 307 measures time for the second set time, a stop command is output from the control device 300 to the drive motor 209. Thus, the replacement of the screen plate 201A is completed.

<Squeegee exchange>
When exchanging the squeegee 213, when the operator operates the squeegee exchange switch 309, the controller 300 outputs a command to retract the drive rod 215a to the squeegee attaching / detaching cylinder 215, and the squeegee angle adjusting motor. A command is output to 238 such that the squeegee support member 219 has a replacement angle. As a result, the support plate 217 swings around the pin 220 in a direction (clockwise in FIG. 1) that separates the blade 213A from the inner peripheral surface of the screen plate 201A, and the squeegee support member 219 is attached to the support plate 217. Since it rotates along the circular arc-shaped notch, the squeegee 213 is positioned in the rotary screen 201 at the squeegee replacement position in which the squeegee 213 is retracted from the squeegee disengagement position to the axial center side of the rotary screen 201 and the squeegee support member. 219 positions the squeegee 213 at the replacement angle.

  Subsequently, the handle 219C of the squeegee support member 219 is rotated, and the screw of the pin 219E is loosened to release the holding of the press plate 219B between the flat surface portion of the squeegee support portion 219A and the lower end surface of the handle 219C, and the press plate 219B. Is rotated to release the upper openings of the rectangular grooves of the left and right squeegee support members 219. Thereafter, the hoist 402 is positioned from the hoist retreat position to the hoist work position. At that time, the squeegee support part 420 is positioned below (a mounting position) the squeegee 213 supported by the squeegee support member 219. Then, when the squeegee support unit driving device 430 raises the squeegee support unit 420 vertically, for example, from the squeegee mounting position to the squeegee removal position, and when the squeegee bar 213B is fitted in the rectangular groove of the squeegee support unit 420, The lift of the support portion 420 is temporarily stopped, the fixing plates 425 and 426 are positioned at a fixed position, the handles 427 and 428 are rotated and the squeegee bar 213B is clamped and fixed to the squeegee support portion 420, and then the squeegee by the squeegee support portion driving device 430. When the raising of the support portion 420 (squeegee 213) is resumed, the squeegee bar 213B is disengaged from the rectangular groove of the squeegee support member 219, whereby the squeegee bar 213B is transferred from the left and right squeegee support members 219 to the squeegee support portion 420.

  Subsequently, after the squeegee support part drive device 430 raises the squeegee support part 420 (squeegee 213) to a position separated from the squeegee support member 219, the squeegee support part 420 (squeegee 213) is stopped from rising, and the hoist 402 is moved. Move from the position near the hoist to the hoist separation position. When the hoist 402 moves to the hoist separation position, the slide rail 401 guides the hoist 402 while extending.

  Thereafter, the handles 427 and 428 of the hoist 402 are rotated to release the pinching between the fixed plates 425 and 426 and the squeegee support part 420, and the fixed plates 425 and 426 are rotated, so that the rectangular grooves of the squeegee support part 420 are rotated. The upper opening is released and the old squeegee 213 is removed.

  Thereafter, when attaching a new squeegee 213, the squeegee bar 213B of the new squeegee 213 is fitted into the rectangular groove of the squeegee support portion 420 with the reference pin 503 as a reference, the fixing plates 425 and 426 are positioned at the fixing position, and the handles 427 and 428 are rotated. Thus, the squeegee bar 213B is clamped and fixed to the squeegee support part 420, and the squeegee support part 420 is cantilevered.

  Subsequently, after the squeegee support part driving device 430 raises the squeegee support part 420 (squeegee 213), the hoist 402 is moved to a position near the hoist. When the hoist 402 moves to a position near the hoist, the slide rail 401 guides the hoist 402 while contracting.

  After the hoist 402 is positioned in the vicinity of the hoist, the squeegee support part 420 (squeegee 213) is lowered by the squeegee support part driving device 430, and the squeegee bar 213B has a rectangular shape of the left and right squeegee support members 219 with respect to the reference pins 501 and 502. When the squeegee support unit 420 is fitted into the groove, the descent of the squeegee support unit 420 (squeegee 213) by the squeegee support unit driving device 430 is temporarily stopped, the handles 427 and 428 are rotated, and the fixing plates 425 and 426 are positioned at the release positions. After the opening of the rectangular groove is released, when the descent of the squeegee support portion 420 (squeegee 213) by the squeegee support portion driving device 430 is resumed, the squeegee support portion 420 lowers the squeegee support portion 420 from the squeegee support portion 420. Come off. As a result, the squeegee bar 213B is transferred from the squeegee support portion 420 to the left and right squeegee support members 219. Thereafter, the pressing plates 219B of the left and right squeegee support members 219 are rotated to a position where the bottom surface of the notch 219Ba of the pressing plate 219B comes into contact with the pin 219E, and the pressing plate 219B opens the rectangular groove of the squeegee support member 219. Is closed, and the handle 219C is rotated, whereby the squeegee bar 213B is fixed in the rectangular grooves of the left and right squeegee support members 219 by the action of a pin screw (not shown).

  When the squeegee bar 213B is fixed to the squeegee support member 219, the hoist 402 is positioned at the hoist retreat position.

  Thereafter, when the squeegee attachment completion switch 310 is operated, the controller 300 outputs a command to extend the drive rod 215a to the squeegee attaching / detaching cylinder 215 and supports the squeegee angle adjusting motor 238 to support the squeegee. A command is output to set the member 219 as the initial angle. Accordingly, the support plate 217 swings around the pin 220 in a direction (counterclockwise in FIG. 1) to bring the blade 213A closer to the inner peripheral surface of the screen plate 201A, and the squeegee support member 219 is supported by the support plate 217. Since the squeegee 213 is positioned in the rotary screen 201 from the squeegee replacement position where the squeegee 213 is retracted to the axial center side of the rotary screen 201, the squeegee is supported. The member 219 positions the squeegee 213 at the initial angle. Thus, the replacement of the squeegee 213 is completed.

  The squeegee replacement assisting device of the rotary screen printing machine according to the present embodiment described above has the following operational effects.

  First, a hoist 402 that moves while being supported by the slide rail 401 between a position near the hoist near the frame 101 and a hoist separation position separated from the frame 101 is provided, the hoist 402 can be cantilevered, and When the hoist 402 is positioned at the position near the hoist by providing the slide rail 401 that supports the hoist 402 so as to be movable between the position near the hoist near the frame 101 and the position separated from the frame 101. Neither the hoist 402 nor the slide rail 401 protrudes to the outside of the frame 101 so that it does not interfere with the work. Further, the construction of the hoist 402 and the slide rail 401 allows the squeegee to be exchanged by one worker. It can be carried out.

  In addition, since the swing center of the hoist 402 is configured to be parallel to the axial direction of the rotary screen 201, the hoist 402 can swing along the side surface of the frame 101, even if it is positioned at the hoist retracted position. It does not protrude greatly from the side surface of the frame 101 and does not interfere with the operator. In addition, since the hoist 402 does not get in the way when viewing the ink state of the rotary screen 201 from the end opening of the rotary screen 201 or accessing the inside of the rotary screen 201, confirmation work, adjustment work, and maintenance work are easy. Can be done.

  While the hoist 402 moves to the position near the hoist or the hoist separation position, the squeegee 213 passes through the inside of the rotary screen 201, but the opening of the end ring 210B of the rotary screen 201 has a large diameter. Therefore, the squeegee 213 does not come into contact with the end ring 201B, and the squeegee support unit driving device 430 raises the squeegee 213. Therefore, the squeegee support member 219 (worm wheel 235) positioned at the replacement position is used. Since there is no contact, the squeegee 213, the end ring 201B, and the squeegee support member 219 are not damaged.

  In addition, since the squeegee angle adjusting motor 238 is provided and the squeegee support portion 219A is automatically adjusted to the replacement angle when the squeegee 213 is positioned at the hoist work position, the squeegee bar 213B is changed when the squeegee 213 is replaced. When the squeegee support part 219A is transferred from the squeegee support part 420 or when the squeegee bar 213B is changed from the squeegee support part 420 to the squeegee support part 219A, the direction of the rectangular groove of the squeegee support part 219A is always suitable for replacement. Because of the angle, the transfer work can be performed smoothly and the burden on the operator is reduced.

  Further, by supporting the support plate 217 on the sub-frame 204, the left and right (axial) support positions of the squeegee 213 by the support plate 217 can be brought close to each other, and the length of the squeegee 213 is minimized. The weight of the squeegee 213 can be reduced, and the burden on the operator can be greatly reduced.

  Furthermore, according to the rotary screen printing machine according to the present embodiment, the support plate 217 is supported on the sub-frame 204, so that the squeegee 213 and the rotary screen 201 can be removed simultaneously at the start of printing or at the end of printing. It becomes possible to move to the position, and the time required for the movement of the rotary screen 201 and the squeegee 213 can be shortened as compared with the conventional case, and the efficiency at the time of printing can be improved. That is, in the conventional rotary screen device, the means for attaching / detaching the rotary screen 201 to / from the impression cylinder 100 and the means for attaching / detaching the squeegee 213 to / from the rotary screen 201 are driven independently. At the end of printing, in order to protect the screen plate 201A from the blade 201A, it is necessary to first move the squeegee 213 to the axial center side of the rotary screen 201 and then move the rotary screen 201 away from the impression cylinder 100. Since the screen 201 is not immediately separated, and the rotary screen 201 needs to be separated from the impression cylinder 100 immediately after the end of printing, the squeegee 213 is moved to the axis of the rotary screen 201 during the printing of the final sheet. Move to the center and print Since the rotary screen 201 was set to be in a state of being separated from the impression cylinder 100 immediately after completion, the final sheet has fallen into a printing failure. On the other hand, in the squeegee exchange auxiliary device of the rotary screen printing machine according to the present embodiment, the squeegee 213 and the rotary screen 201 are placed immediately after the final sheet is printed by supporting the support plate 217 on the subframe 204. Since it can be moved to the rotary screen removal position at the same time, there is an advantage that printing can be performed without wasting the final sheet.

Moreover, the squeegee support member 219 to the support plate 217, squeegee angle adjustment motor 238, and is supported eccentric sleeve 221, the tangent L of the impression cylinder 100 of the eccentric sleeve 221 in contact P ₃ between the tip and the screen plate 201A of the blade 213A _{2. When} the squeegee angle is adjusted by moving the squeegee angle adjustment switch 311 and rotating the squeegee support member 219 by the motor 238 for adjusting the squeegee angle by adjusting the squeegee angle. by the tips of the blades 213A deviated from the contact P _3, it can be modified by translating along the support plate 217 by rotating the eccentric sleeve 221 in the tangential L _2.

In addition, since the contact surface 217 a that contacts the screw 236 of the support plate 217 is disposed at a position parallel to the tangent line L ₂ (in the present embodiment, flush with the surface), the blade 213 A is tangent to the eccentric sleeve 221. When moving on L ₂ , the support plate 217 can be translated along the tangent line L ₂ by the contact surface 217 a and the screw 236 in cooperation with the eccentric sleeve 221, and the blade 213 A can be moved by the eccentric sleeve 221. when moving, because the contact surface 217a moves parallel to the tangential line L _2, it is possible to maintain the pressing force against the screen plate 201A of the blade 213A in a state of arranging the squeegee 213 to squeegee fixing position constant.

Further, when adjusting the squeegee angle according to the type of ink, etc., the squeegee support member 219 is rotated by the worm 234 to adjust the squeegee angle. However, the three points P ₁ , P ₂ and P ₃ described above are aligned. Therefore, when the squeegee support member 219 is rotated when adjusting the angle of the blade 213A, the tip of the blade 213A moves away from the inner peripheral surface of the screen plate 201A. Therefore, the tip of the blade 213A does not move to the screen plate 201A side and an excessive pressing force from the blade 213A is not applied to the screen plate 201A, and the screen plate 201A is not damaged by adjusting the squeegee angle.

  In addition, since both ends of the rotary screen 201 in the axial direction are rotationally driven, the blade 201A is pressed against the inner peripheral surface of the screen plate 201A during printing as compared with the case where one end of the rotary screen 201 is rotationally driven. As a result, the left and right (axial direction) rotation of the rotary screen 201 is not displaced, and this does not lead to a misregistration of the left and right, so that the print quality can be improved.

  Moreover, in the structure which rotationally drives the both sides of the conventional rotary screen, since the position of the circumferential direction with respect to the bracket 203 for rotary screens of the support member 202 is decided, when attaching end ring 201B to the screen plate 201A, it mutually If the reference position in the circumferential direction is shifted, the screen plate 201A may be twisted in the left and right (axial direction) when the left and right end rings 201B are attached to the support member 202, respectively, which may lead to misalignment of the left and right. It was. On the other hand, in the rotary screen printing machine according to the present embodiment, the rotary screen rotation drive device includes the clutch 210, so that when the rotary screen 201 is driven to rotate, the clutch 210 and the rotary shaft 206 are first connected. Since both ends of the rotary screen 201 can be attached to the support member 202 in the state of being cut off, even if the reference positions in the circumferential direction are slightly shifted when the end ring 201B is attached to the screen plate 201A, the screen plate 201A Can be attached to the support member 202 without twisting, and there is no misregistration between the driving side and the operation side of the rotary screen 201, and the printing quality can be improved.

  In addition, the clutch 210 is connected after the rotary screen 201 is driven on one side for a predetermined time by the drive motor 209, so that the gear state (one supporting member) is set on both the left and right (axial direction) sides of the rotary screen 201 during printing. 202, the phase state of the gear 202 a, one intermediate gear 208, and the gear 205 a of the rotating shaft 205, and the phase state of the gear 202 a of the other support member 202, the other intermediate gear 208, and the gear 206 a of the rotating shaft 206). Therefore, it is possible to prevent the left and right registers from being misaligned due to backlash.

  Moreover, in the present embodiment, it is possible to select either the state in which the gear 206a of the rotating shaft 206 and the rotating shaft 206 can freely rotate with each other or the state in which they can rotate integrally.

  In the rotary screen printing machine according to this embodiment described above, the squeegee attaching / detaching cylinder 215 provided for moving the squeegee 213 to the attaching / detaching position and the hoist retracting position, and the rotary screen 201 and the squeegee 213 to the printing position. The screen plate attaching / detaching cylinder 228 provided for moving between the hoist retracting position may use a motor instead of the cylinder.

  The present invention is suitable for application to a squeegee exchange auxiliary device of a rotary screen printing machine that performs screen printing using a cylindrical screen plate.

DESCRIPTION OF SYMBOLS 100 Impression cylinder 101 Frame 200 Rotary screen apparatus 201 Rotary screen 201A Screen plate 201B End ring 202 Bearing member 202a Gear of supporting member 203 Rotary screen bracket 203a Rotary screen support part 203b Rotating shaft support part 204 Subframe 204a For the first connection Bracket 204b Second connecting bracket 204c Third connecting bracket 204d Fourth connecting bracket 204e Fifth connecting bracket 205, 206 Rotating shaft 205a, 206a Rotating shaft gear 207 Connecting member 208 Intermediate gear 209 For driving Motor 209a Drive motor gear 210 Clutch 211 Rotary screen position adjustment motor 211a Rotary screen position adjustment Motor drive rod 211b screw 212 tension cylinder 213 squeegee 213A blade 213B squeegee bar 214, 216, 218, 220, 223, 225, 229, 230 pin 215 squeegee detachable cylinder 215a squeegee detachable cylinder drive rod 217 support plate 217a Contact surface 219 Squeegee support member 219A Squeegee support portion 219B Holding plate 219Ba Notch 219C Handle 219D Pin 219E Pin 221 Eccentric sleeve 221a Long hole 221b Pin 222 First link member 224 Second link member 226 Rotating shaft 227 Third link member 228 Screen Plate detaching cylinder 228a Screen plate detaching cylinder drive rod 234 Worm 235 Worm gear 236 Screw 237 Stroke 238 Squeegee angle adjustment motor 239 Block 300 Controller 301 Plate exchange switch 302 Plate installation complete switch 303 Rotary encoder 304 Print start switch 305 Counter 306 Print stop switch 307 Timer 308 Screen left / right position adjustment switch 309 Squeegee replacement switch 310 Squeegee installation complete Switch 311 Squeegee angle adjustment switch 400 Squeegee exchange assist device 401 Slide rail 402 Hoist 403 Hinge 411 Fixed rail 412 Intermediate rail 413 Movable rail 420 Squeegee support portion 421 Plate 422 L-shaped member 423,424 Screw 425,426 Fixed plate 427,428 Handle 430 Squeegee support part drive device 431 Guide member 431a Guide surface 432 Screw 433 bracket 434 handle 440 handle 450 hoist body portion 501, 502 and 503 reference pin

Claims (4)

In a squeegee change assisting device for a rotary screen printing machine that supports a squeegee and guides the squeegee between the inside of a cylindrical screen plate and the outside of a machine frame that supports the screen plate.
A hoist that supports the squeegee movably in the radial direction of the screen plate;
The base end side is supported by the machine frame and the free end side supports the hoist, the free end side has a first position where the hoist is close to the machine frame, and the distance from the hoist to the machine frame is A squeegee exchange assisting device for a rotary screen printing machine, comprising: an expansion / contraction guide movable in the axial direction of the screen plate so as to be positioned at a second position longer than the axial length of the squeegee. In the first position, the hoist is freely movable between the hoist operation position that covers a part of the side end opening of the screen plate and the hoist retreat position that opens the side end opening of the screen plate. 2. The squeegee exchange assisting device for a rotary screen printing machine according to claim 1, wherein the squeegee changing auxiliary device is supported. The hoist is
A squeegee support for supporting the squeegee supported by the main body of the hoist so as to be movable along the main body;
3. The squeegee replacement assisting device for a rotary screen printing machine according to claim 1, further comprising: a support portion driving unit that moves the squeegee support portion. The squeegee includes a blade and a squeegee bar having a rectangular portion having a rectangular cross section,
The squeegee support is
A rectangular recess into which the rectangular portion of the squeegee bar fits;
The squeegee exchange auxiliary device for a rotary screen printing machine according to claim 3, further comprising: a fixing member that closes the opening of the rectangular recess and fixes the squeegee bar to the squeegee support.

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