JP2010012747A - Blanket fixing device of rotary printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blanket fixing device which can fix a blanket accurately and firmly to a blanket cylinder and has a reduced number of components. <P>SOLUTION: A block 3 is fixed to a recess 2 formed in the blanket cylinder 1, a restriction groove 5 for restricting the base end of the blanket is formed in the circumferential face of the blanket cylinder 1, and a rotary bar 8 is supported rotatably with the blanket cylinder 1. A presser bar 14 long in the axial direction which pushes/fixes the base end of the blanket inserted into the restriction groove 5 is supported forward/backward movably with the rotary bar 8. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a blanket fixing device for fixing a blanket to a blanket cylinder of a rotary printing press.

  In a rotary printing press used for printing newspapers, etc., ink is transferred from a plate cylinder placed opposite to the blanket cylinder onto a blanket wound around the outer periphery of the blanket cylinder, and the transferred ink travels. It is printed on paper.

  FIG. 9 is a perspective view showing an example of a blanket. In this blanket B, a thin metal plate 22 is fixed to the lower surface of the flat rubber layer 21, and base ends 17 and 18 in which both ends of the metal plate 22 protrude from the flat rubber layer 21 are formed. When this blanket B is used, the projected base end is bent and inserted into the restraining groove 5 (FIG. 2) of the blanket cylinder. When the blanket B is fixed to the blanket cylinder, one base end 17 of the blanket B is inserted into the restraining groove 5 and wound around the blanket cylinder, and the other base end 18 is inserted into the restraining groove 5 and then the base end 17 is inserted. , 18 are fixed by a blanket fixing device arranged in the blanket cylinder.

  Various types of blanket fixing devices have been proposed (see, for example, Patent Documents 1 and 2). In order to reduce vibration and noise during rotation, the blanket cylinder of Patent Document 1 has a hole parallel to the axis and the blanket cylinder on the outer circumferential surface of the blanket cylinder along this hole. Open with a width slightly larger than twice the thickness of the base plate, make one edge at an acute angle that is almost the same as the angle at the blanket's gripping side, and the other edge at any angle at the blanket's tail edge Rotating displacement with an insertion groove with a smaller acute angle, a hook that is rotatably supported by the hole, hooked inside the bent part of the blanket's tail edge by rotational displacement, and pulls the tail edge side into the trunk In the blanket cylinder, the pull-in shaft is formed with one side of the push-out surface that pushes the tail-out side out of the body and is spaced apart from the tail-out side, and the pull-in shaft is always in the blanket body of the blanket And a blanket attachment portion constituted by the rotational force applying means for applying a force in the direction retract.

Further, in Patent Document 2, a rubber blanket unit is fixed to a support plate in order to reduce vibration generated due to the impact of the cylinder groove during the printing process and to eliminate the need for tightening the rubber blanket. It is made of rubber blanket, and the edge bent leg of the support plate is arranged to protrude beyond the end of the rubber blanket, and the edge bent leg of the support plate is put together with the slit of the rubber cylinder There are provided a plurality of individually press-supported pressing projections that press against the side surfaces of the two, and the pressing projections are arranged side by side in the axial direction so as to act only in a direction substantially perpendicular to both legs, The spring force and the spring stroke are set so that both leg portions of the support plate contacting each other can be securely tightened between the side surface of the slit and the pressing projection 8.
JP 2002-019079 A JP-A-9-99543

  In the blanket fixing device described in Patent Document 1, since the blanket is pulled in and fixed on the rotating shaft hanging portion, and the blanket is fixed or loosened, the blanket folding portion is accurately and firmly fixed. Sometimes it cannot be fixed. Further, it becomes very difficult to insert the bent portion on the tail edge side into the restraining groove. The blanket fixing device described in Patent Document 2 has a structure in which a blanket is pulled in and fixed to a slit of a rotating shaft, and is partially pressed by a plurality of pressing protrusions. The number of points increases, and the assembly work takes time.

  Therefore, the present invention provides a blanket fixing device that can fix a blanket to a blanket cylinder with high accuracy and strength and has a reduced number of parts.

  In the present invention, a constraining groove for constraining by inserting the proximal end of the blanket in the axial direction is formed on the peripheral surface of a cylindrical blanket cylinder, and a rotating bar is supported in the blanket cylinder so as to be rotatable about its axis. The rotating bar is supported by an elongate pressing bar that can be moved back and forth in the axial direction for pressing and fixing both base ends of the blanket inserted into the restraining groove.

 In the present invention, a block having an outer peripheral surface equal to the outer shape of the blanket cylinder and forming a partial peripheral surface of the blanket cylinder is fixed to a concave portion formed in the axial direction on the peripheral surface of the cylindrical blanket cylinder. A restraint groove is formed on the peripheral surface of the blanket cylinder between the recess of the blanket cylinder body and the opposing surface of the block to insert and restrain both blankets, and the block is restrained in the axial direction. A rotating bar is supported in a rotating bar groove having an open portion leading to the groove so as to be rotatable about its axis, and the rotating bar is long in the axial direction to press and fix the base end of a blanket inserted into the constraining groove. It can be set as the structure by which the shape | molded holding bar is supported so that advancing and retreating is possible.

 In this configuration, a rotation collar provided with an insertion hole for inserting a rod for rotating the rotation bar in a direction orthogonal to the axis is provided at one end of the rotation bar and can move in the axial direction of the rotation bar and rotate the rotation bar. A press bar that presses and fixes both base ends of the blanket inserted into the restraining groove is pressed against the rotating bar. A compression spring passed through each of a plurality of bolts fixed to the bar can be interposed between the pressing bar and the rotation bar and supported by the rotation bar so as to be able to advance and retreat.

  Further, the pressing bar may be divided into a plurality in the axial direction, or a plurality of blanket base end pressing portions of the pressing bar may be formed at intervals.

  Further, both base ends of the blanket inserted into the constraining groove are positioned on the inner surface of the rotating bar groove, and the positional relationship between the constraining groove and the rotating bar groove is set, and the base end is bent and pressed to the inner surface of the rotating bar groove with a pressing bar. It can be configured.

  In addition, a bulging portion may be formed at the base end of the blanket, and the bulging portion or around the bulging portion may be pressed with a pressing bar, and the concave surface of the bulging portion may be pressed with a pressing bar. Good.

  In the present invention, since the base end of the blanket is pressed over the entire width direction by the pressing bar, it can be easily inserted into the restraining groove and can be fixed accurately and firmly.

  In the present invention, since a plurality of bolts and compression springs are provided on the long pressing bar and the entire blanket base end is pressed, the structure is simple and the number of parts can be reduced.

  In the present invention, the base end can be firmly fixed by the spring force by forming the bulging portion at the base end of the blanket.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a restraint groove portion with a width of 2 pages in a blanket cylinder having a width of 2 pages and a width of 4 pages equipped with a blanket fixing device of the present invention. Shows the state where the holding bar is retracted. 2A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line BB.

  1 and 2, a cylindrical blanket cylinder 1 includes a blanket cylinder main body 1a, a block 3, a rotary bar 8, and the like, and a concave portion 2 is formed in the axial direction on the outer periphery of the blanket cylinder main body 1a. A block 3 is incorporated therein, and the block 3 is fixed to the blanket cylinder main body 1 a with bolts 4. The block 3 has a shape whose outer peripheral surface is equal to the outer peripheral surface of the blanket cylinder 1, and forms a partial peripheral surface of the blanket cylinder 1. On the peripheral surface of the blanket cylinder 1, a restriction groove 5 is formed for inserting and restraining the base ends 17 and 18 (FIG. 3) of the blanket B between the recess 2 of the blanket cylinder body 1 a and the opposing surface of the block 3. Has been.

  In the block 3, a rotary bar groove 7 having a circular cross section having an open portion 6 communicating with the restraining groove 5 in the axial direction is formed. A rotating bar 8 is supported in the rotating bar groove 7 so that both ends of the rotating bar 8 are rotatable about the axis on the blanket cylinder 1.

  In the embodiment, the block is fixed to the recess formed in the blanket cylinder main body, but it is also possible to form a rotation bar groove into which the rotation bar is inserted along the constraint groove from the end surface of the blanket cylinder.

  At one end of the rotating bar 8, a rotating collar 10 provided with an insertion hole 9 for inserting a rod for rotating the rotating bar 8 in a direction perpendicular to the axis is movable in the axial direction of the rotating bar and the rotating bar is mounted. It is attached with a key so that it can rotate. Further, the rotation collar 10 is provided so as to be able to contact and separate with respect to the blanket cylinder 1 via a clutch 11, and is urged toward the clutch by a compression spring 12 so that it cannot rotate.

 The rotating bar 8 is provided with a pressing bar 14 that presses and fixes the base end of the blanket inserted into the restraining groove 5 against the wall surface 13 of the recess 2 of the blanket cylinder 1 so as to be able to advance and retreat. The pressing bar 14 is supported by the rotating bar 8 so as to be capable of moving forward and backward by interposing a compression spring 16 through a bolt 15 fixed to the pressing bar 14 between the pressing bar 14 and the rotating bar 8. In FIG. 1, the pressing bar 14 is one along the two-page width restricting groove 5, and bolts 15 are provided at seven locations of the pressing bar 14.

  Next, the operation of the blanket fixing device will be described.

  FIG. 3 is a longitudinal sectional view showing a state in which the base end of the blanket is inserted into the restraining groove and fixed.

  As shown in FIG. 2B, in the state where the holding bar 14 is restrained in contact with the inner surface of the rotating bar groove 7, one base end 17 of the blanket is inserted into the restraining groove 5 and hooked on the blanket cylinder 1. Further, the other base end 18 is inserted and overlapped. The base ends 17 and 18 are inserted up to the opening 6 of the rotating bar groove 7.

  Next, a rod is inserted into the insertion hole 9 of the rotating collar 10 provided at one end of the rotating bar 8 shown in FIG. 1, the clutch 11 is removed, and the rotating bar 8 is rotated. As the rotary bar 8 rotates, the presser bar 14 moves from the inner surface of the rotary bar groove 7 to the opening 6 that leads to the restraining groove 5 so that the presser bar 14 contacts the base end 18 of the blanket B, and the base ends 17, 18 are The blanket cylinder 1 is pressed against the wall surface 13 of the recess 2 and fixed.

    When the base ends 17 and 18 of the blanket B are fixed, the rotation collar 10 is urged toward the clutch 11 by a compression spring to prevent the rotation bar 8 from rotating, and the rod is pulled out from the insertion hole 9.

    When replacing the blanket B, a rod is inserted into the insertion hole 9 of the rotation collar 10, the clutch 11 is removed against the compression spring 12, and the rotation bar 8 is rotated in the reverse direction. When the presser bar 14 moves from the opening 6 to the inner surface of the rotary bar groove 7 as the rotary bar 8 rotates, the presser bar 14 comes off the base ends 17 and 18 of the blanket B and can be replaced.

FIG. 4 is an embodiment of the base end of the blanket, (a) is a front view, (b) is a perspective view seen from below, and (c) is a longitudinal sectional view showing a state in which the base end of the blanket is inserted into a restraining groove. It is.
4 (a) and 4 (b), a curved bulging portion 19 bulging outward over the entire length is formed at one base end 17 of the blanket.

  As shown in FIG. 4 (c), the base ends 17 and 18 of the blanket B are inserted into the restraining grooves 5, and the rotating bar 8 is rotated. As the rotary bar 8 rotates, the presser bar 14 moves from the inner surface of the rotary bar groove 7 to the opening 6 that leads to the restraining groove 5 so that the presser bar 14 contacts the base end 18 of the blanket B, and the base end 17 is the blanket cylinder. 1 is pressed against the wall surface 13 of the recess 2 to be fixed. The pressing force of the pressing bar 14 is increased by the spring force of the bulging portion 19 where the base ends 17 and 18 overlap each other, so that the pressing bar 14 can be firmly fixed.

FIG. 5 is another embodiment of the base end of the blanket, (a) is a front view, (b) is a longitudinal sectional view showing a state where the base end of the blanket is inserted into the restraining groove, and (c) is still another embodiment. FIG.
In FIG. 5A, a curved bulging portion 19 bulging inward over the entire length is formed at one base end 17 of the blanket, and the other base end 18 bulges outward over the entire length. A curved bulge 20 is formed. FIG. 5B is an example in which the pressing bar 14 is firmly fixed by entering and pressing the concave side of the bulging portions 19 and 20 where the base ends 17 and 18 overlap.

  FIG. 5C shows an example in which a concave portion 13a is formed in the wall surface 13 and a bulging portion 19 is overlapped on the concave portion 13a.

  FIGS. 6A to 6C are views showing another embodiment of the bulging portion at the base end of the blanket.

  6A is a diagram showing a bulging portion 19 having a triangular section that bulges outward over the entire length, and FIG. 6B is a bulging portion that bulges outward and is formed at intervals. 6 (c) is a diagram showing the bulging portion 19 formed in a mountain shape, and FIG. 6 (d) is a diagram showing a plurality of long bulging portions formed at intervals. Similar to the bulging portion 19 shown in FIGS. 4 and 5, the base ends 17 and 18 can be firmly fixed by a spring force.

  FIG. 7 is a longitudinal sectional view showing another embodiment for fixing the base end of the blanket.

  In FIG. 7, the curved surface of the rotary bar groove 7 having a circular cross section is continuous with the constraining groove 5. Both base ends 17 and 18 of the blanket inserted into the restraining groove 5 are pressed by the pressing bar 14 to the curved surface continuing to the restraining groove 5 of the rotating bar groove 7, bent along the curved surface, and firmly fixed.

  The base ends 17 and 18 may be bent in advance, and can be fixed by pressing against the curved surface of the rotating bar groove 7 with the pressing bar 14.

  FIG. 8 is a view showing another embodiment of the presser bar used in the present invention.

  FIG. 8A is an example in which a plurality of pressing portions 21 at the base end of the blanket of the pressing bar 14 are formed at intervals. In this example, the pressing force of each pressing portion 21 is smaller than pressing the whole. Can be strong.

  8B shows an example in which the presser bar 14 is divided into a plurality of parts in the axial direction, and FIG. 8C shows the presser part 21 formed on the split presser bar 14.

  A plurality of bolts 15 are fixed to each pressing bar 14 as in the first embodiment, and a compression spring is provided.

  In the present embodiment, even if the thickness of the base end of the blanket is not uniform or there is a foreign object in the pressing portion, it can be pressed by another pressing portion.

It is a longitudinal cross-sectional view which shows the part of the restraint groove | channel of 2 pages width in the blanket cylinder of 2 pages circumference length 4 pages width provided with the blanket fixing device of this invention. (A) is AA sectional drawing of FIG. 1, FIG.2 (b) is BB sectional drawing. It is a longitudinal cross-sectional view which shows the state which inserted the base end of the blanket in the restraint groove | channel. It is another Example of the base end of a blanket, (a) is a front view, (b) is the perspective view seen from the bottom, (c) is a longitudinal cross-sectional view which shows the state which inserted the base end of the blanket in the restraint groove | channel. . It is another Example of the base end of a blanket, (a) is a front view, (b) is a longitudinal cross-sectional view which shows the state which inserted the base end of the blanket in the restraint groove | channel. (A)-(d) is a figure which shows another Example of the bulging part of the base end of a blanket. It is a longitudinal cross-sectional view which shows another Example which fixes the base end of a blanket. It is a figure which shows another Example of the pressing bar used by this invention. It is a perspective view which shows the example of a blanket.

Explanation of symbols

1: Blanket cylinder 2: Recess 1a: Blanket cylinder body 3: Block 4: Bolt 5: Restraining groove 6: Opening part 7: Rotating bar groove 8: Rotating bar 9: Insertion hole 10: Collar for rotation 11: Clutch 12: Compression Spring 13: Wall surface 13a: Recess 14: Pressing bar 15: Bolt 16: Compression spring 17, 18: Base end 19, 20: Swelling part 21: Pressing part B: Blanket

Claims (9)

  A constraining groove for axially inserting and restraining the base end of the blanket is formed on the peripheral surface of the cylindrical blanket cylinder, and a rotating bar is supported in the blanket cylinder so as to be rotatable about its axis. A blanket fixing device for a rotary printing press, characterized in that a long presser bar is supported so as to be able to advance and retreat in the axial direction for pressing and fixing both base ends of the blanket inserted into the restraining groove.  A block having an outer peripheral surface equal to the outer shape of the blanket cylinder and a part of the blanket cylinder is fixed to a recess formed in the axial direction on the peripheral surface of the cylindrical blanket cylinder. A constraining groove is formed on the peripheral surface between the concave portion of the blanket cylinder body and the opposing surface of the block to insert and constrain both base ends of the blanket, and the block is open in the axial direction leading to the constraining groove The rotary bar is supported in a rotary bar groove having a portion so as to be rotatable about its axis, and the rotary bar has a long press bar in the axial direction for pressing and fixing the base end of the blanket inserted into the restraining groove. A blanket fixing device for a rotary printing press, characterized in that is supported so as to be able to advance and retreat.   At one end of the rotating bar, a rotating collar provided with an insertion hole for inserting a rod for rotating the rotating bar in a direction perpendicular to the axis is provided so as to be movable in the axial direction of the rotating bar and to be able to rotate the rotating bar. A blanket fixing device for a rotary printing press according to claim 1 or 2, wherein the blanket cylinder is provided so as to be able to contact and separate via a clutch.   The rotating bar has a holding bar that presses and fixes both base ends of the blanket inserted into the restraining groove, and a compression spring that passes through each of the bolts fixed to the holding bar is placed between the holding bar and the rotating bar. The blanket fixing device for a rotary printing press according to any one of claims 1 to 3, wherein the rotary bar is supported by a rotary bar so as to be capable of moving forward and backward.   The blanket fixing device for a rotary printing press according to any one of claims 1 to 4, wherein the presser bar is divided into a plurality of portions in the axial direction.  The blanket fixing device for a rotary printing press according to any one of claims 1 to 5, wherein a plurality of blanket base end pressing portions of the pressing bar are formed at intervals.   The curved surface on the open side of the rotating bar groove is continuous with the restricting groove, and both base ends of the blanket inserted into the restricting groove are pressed against the curved surface of the rotating bar groove by a pressing bar. A blanket fixing device for a rotary printing press according to any one of 1 to 6.   A blanket fixing device for a rotary printing press according to any one of claims 1 to 7, wherein a bulging portion is formed at a base end of the blanket, and the bulging portion or the periphery of the bulging portion is pressed by a pressing bar. .   The blanket fixing device for a rotary printing press according to claim 8, wherein the concave surface of the bulging portion is pressed by a pressing bar.

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