JP2011025543A - Printing plate and plate loading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing plate for easier and more accurate attachment of a cylindrical plate to a plate loading device, and the plate loading device. <P>SOLUTION: The printing plate 2 is constructed in a manner that a cylindrical plate body 4 is formed by combining and bonding both ends 7a of a rectangular elastic material sheet 7, a predetermined part 4a including the combined part 8 of the plate body 4 is flat, and a remaining part 4b is cylindrical. A circumferential-direction positioning recess 41 is formed in one end of the cylindrical part 4b opposite the combined pat 8, and a plate part 5 is formed in a predetermined place of the outer peripheral surface of the cylindrical part 4b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printing plate (press plate) and a plate mounting device.

  As a printing machine, a printer in which a plate is mounted on the outer periphery of a plate cylinder fixed to the plate drive shaft is known.

  In the printing press as described above, a sheet-shaped plate may be wound around and mounted on a plate cylinder fixed to the plate drive shaft. In that case, it is difficult to mount the plate in the printing press, and it is difficult to accurately attach the plate to the plate cylinder.

  In order to avoid this, the plate cylinder may be fixed to the plate drive shaft after the sheet-like plate is wound and mounted on the plate cylinder removed from the plate drive shaft. In this case, since the plate cylinder has a considerable weight, it is difficult to remove and attach the plate cylinder to the plate drive shaft.

  The present inventor has solved the above-mentioned problems and has an outer peripheral surface of a plate body formed into a cylindrical shape by an elastic material as a printing plate that enables a plate to be easily and accurately attached to a printing press. A plate portion is provided in a part of the plate body, and an engagement portion extending in the axial direction is formed on the inner periphery of the plate body (see Japanese Patent Application No. 2008-137766).

  An object of the present invention is to provide a printing press plate and a plate mounting device that make it possible to more easily and accurately mount the cylindrical plate as described above to a printing plate mounting device. .

  In the printing press plate according to the present invention, a cylindrical plate main body is formed by overlapping and joining both ends of a rectangular elastic material sheet, and a predetermined portion including the overlapping portion of the plate main body is flat. The remaining portion has a cylindrical shape, a concave portion for circumferential positioning is formed at one end portion of the cylindrical portion on the opposite side of the overlapping portion, and a plate portion is provided at a predetermined position on the outer peripheral surface of the cylindrical portion. It is characterized by this.

  In this specification, the term “plate part” refers to a part where a plate has already been formed (a part that has been made) and a part for forming a plate that has not yet been formed (before the plate making). Part) is used to include both.

  In the printing press plate of the present invention, for example, the end portion of the sheet positioned inside the overlapped portion is bent inward to form the engaging portion.

  The engaging portion is formed to facilitate the manufacture of the plate.

  A plate loading device according to the present invention is a device that is fixedly provided on a plate drive shaft of a printing machine in order to load the plate, and is provided on a plate drive shaft in a fixed manner and is provided on the outer periphery of the plate drive shaft. A cylinder surface including a plate mounting surface is provided with a plate cylinder portion having a cylindrical plate mounting surface on which a plate is mounted from the front end side, and a part of the outer circumferential cylindrical surface of the plate cylinder portion is removed in the circumferential direction. A flat plate fixing member mounting surface located on the inner side in the radial direction is formed, and an axial positioning stopper is provided on the outer periphery of the base end portion of the plate cylinder portion so that the plate end abuts. On the outer periphery of the plate mounting surface on the opposite side of the surface, there are provided circumferential positioning convex portions that fit into the circumferential positioning concave portions of the plate at the base end portion, and plate fixing protrusions extending in the axial direction. Place the flat part of the plate mounted on the plate cylinder on the fixed member mounting surface. There is provided a plate fixing member that pushes the cylindrical portion of the plate from the inner side in the radial direction to tightly fix the cylindrical portion of the plate to the plate mounting surface of the plate cylinder portion and fixes the plate fixing protrusion by biting into the cylindrical portion of the plate. It is characterized by this.

  The plate portion of the plate is formed in a cylindrical portion of the plate that is in close contact with the plate mounting surface when the plate is mounted on the plate cylinder portion.

  The inner peripheral dimension of the plate is obtained by slightly increasing the outer peripheral dimension of the plate cylinder portion. That is, the inner diameter of the cylindrical portion of the plate is slightly larger than the outer diameter of the plate mounting surface of the plate cylinder portion, and the inner circumference of the plate cylindrical portion is larger than the outer circumference of the plate mounting surface of the plate cylinder portion. The circumference of the flat portion of the plate is slightly larger than the circumference of the plate fixing member mounting surface of the plate cylinder.

  The plate fixing protrusion extends continuously or intermittently in the axial direction, and preferably extends over the entire length of the plate mounting surface.

  When the plate is attached to the plate mounting apparatus, the plate fixing member does not push the plate radially outward. In such a state, the plate is placed on the outer periphery of the plate cylinder portion so that the cylindrical portion of the plate corresponds to the plate mounting surface of the plate cylinder portion, and the flat portion of the plate corresponds to the plate fixing member mounting surface of the plate cylinder portion. The plate is fitted from the front end side so that the circumferential positioning concave portion of the plate is fitted to the circumferential positioning convex portion of the plate cylinder portion, and one end portion of the plate is brought into contact with the axial positioning stopper of the plate cylinder portion. Accordingly, the plate can be accurately and easily attached to a predetermined position of the plate cylinder portion. The inner circumference of the plate is slightly larger than the outer circumference of the plate cylinder, and when the plate is installed, the plate fixing member does not push the plate radially outward, so there is a gap between the plate cylinder and the plate. The plate can be easily attached to the plate cylinder. Once the plate is installed, the plate fixing member pushes the flat portion of the plate outward in the radial direction, and the cylindrical portion of the plate is fixed in close contact with the plate mounting surface, and the plate fixing protrusion is fixed to the cylinder of the plate. Bite into the shape and fix. Thereby, the plate is securely fixed to the plate cylinder portion, and the position of the plate does not shift with respect to the plate cylinder portion during use.

  The difference between the inner peripheral dimension of the plate and the outer peripheral dimension of the plate cylinder is preferably made as small as possible within a range in which the plate can be easily attached to and detached from the plate cylinder.

  When removing the plate from the plate mounting device, the plate fixing member does not push the plate radially outward. Thus, a gap is generated between the plate cylinder part and the plate, and the plate can be moved in the axial direction and easily removed from the front end of the plate cylinder part.

  In the plate mounting apparatus according to the present invention, for example, a groove is formed on the plate fixing member mounting surface to avoid interference with the plate engaging portion.

  The groove is preferably formed in a shape and size such that the engaging portion of the plate fits in a relatively large gap.

  In this way, even when the engagement portion is formed on the plate, the plate can be easily attached to the plate cylinder portion while avoiding interference between the engagement portion and the plate cylinder portion.

  In the plate mounting apparatus according to the present invention, for example, the plate fixing member can move between a position immersed inside the plate fixing member mounting surface and a position protruding outward, and can be fixed at an arbitrary position. .

  In this case, when the plate is attached to or removed from the plate cylinder portion, the plate fixing member is fixed at a position recessed inside the plate fixing member mounting surface so that the plate is not pushed. After the plate is attached to the plate cylinder portion, the plate fixing member is fixed at a position protruding outward from the plate fixing member mounting surface, thereby pressing the plate radially outward and fixing the plate to the plate mounting surface. To do.

  In this way, it is possible to simply attach and remove the plate and fix the plate simply by moving the plate fixing member and fixing it to an arbitrary position.

  In the above plate mounting apparatus, for example, the plate fixing member is fitted in a recess for the plate fixing member formed on the plate fixing member mounting surface so as to be movable in the radial direction.

  In the plate mounting apparatus described above, for example, a wedge member having a wedge surface radially outward is fitted in a wedge member recess formed in the bottom of the recess of the plate fixing member mounting surface so that the wedge member can move in the axial direction. The plate cylinder portion is provided with screw means for moving the wedge member in the axial direction to stop it at an arbitrary position, and a wedge surface that contacts the wedge surface of the wedge member is formed radially inside the plate fixing member. The plate fixing member is pressed against the wedge surface of the wedge member by urging the plate fixing member radially inward using a permanent magnet between the plate cylinder portion or the wedge member and the plate fixing member. Biasing means is provided.

  In this way, the plate can be easily attached and detached and the plate can be fixed simply by moving the wedge member with the screw means and fixing it to an arbitrary position.

  According to the printing plate mounting apparatus and the printing press of the present invention, as described above, the cylindrical plate can be attached to and detached from the printing press very simply.

FIG. 1 is a longitudinal sectional view of a plate mounting apparatus for a printing press showing an embodiment of the present invention. FIG. 2 is a front view of the plate mounting apparatus. FIG. 3 is a plan view showing a part of the plate mounting apparatus. FIG. 4 is an enlarged longitudinal sectional view showing a part of the plate mounting apparatus and a part of the plate before being mounted on the plate mounting apparatus. FIG. 5 is an enlarged cross-sectional view (transverse cross-sectional view) along the line VV in FIG. FIG. 6 is a drawing corresponding to FIG. 5 showing a state before the plate is fixed. 7 is an enlarged cross-sectional view (transverse cross-sectional view) taken along the line VII-VII in FIG. FIG. 8 is a perspective view in which a part of a block constituting a part of the plate cylinder part is removed. FIG. 9 is a perspective view showing a plate and its manufacturing process. FIG. 10 is a schematic front view showing an example of a plate manufacturing apparatus. FIG. 11 is a schematic front view of a plate manufacturing apparatus showing a state different from FIG.

(1) Plate drive shaft
(2) Version
(3) Plate mounting device
(4) Version body
(4a) Flat part
(4b) Cylindrical part
(5) Print section
(6) Engagement part
(7) Seat
(8) Overlapping part
(12) Plate cylinder
(14) Plate mounting surface
(18) Plate fixing member mounting surface
(20) Axial positioning stopper
(22) First recess (recess for plate fixing member)
(23) Second recess (Wedge member recess)
(21) Groove for circumferential positioning
(24) Plate fixing member
(24a) Wedge surface
(28) Wedge member
(28a) Wedge surface
(30) (31) Permanent magnet
(32) Screw member
(41) Circumferential positioning recess
(42) Circumferential positioning recess
(43) Plate fixing protrusion

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

  FIG. 1 is a longitudinal sectional view of a plate mounting device (3) mounted on a plate driving shaft (1) of the printing machine and mounted with a plate (2), and FIG. 2 is a front view of the plate mounting device (3) of FIG. 3 to 8 are drawings showing in detail each part of the plate (2) and the plate mounting device (3), and FIG. 9 is a perspective view showing the plate (2) and its manufacturing process. In the following description, the top and bottom of FIG. 1 are the top and bottom, the left side of FIG. 1 is the front, the right side is the back, and the left and right when viewing from the front to the back is the left and right.

  The plate (2) includes a plate body (4) formed in a cylindrical shape by overlapping and joining both end portions of a rectangular elastic material sheet (7). A relatively small portion including the overlapping portion (8) of the plate body (4) is a flat portion (4a), and the remaining most portion is a cylindrical portion (4b). A circumferential positioning recess (41) is formed at one end of the cylindrical portion (4b) on the opposite side of the overlapped portion (8). A plate portion (5) is provided at a predetermined position on the outer peripheral surface of the cylindrical portion (4b), and the outer peripheral surface of the plate portion (5) is a plate surface. In this example, the end portion of the sheet (7) located inside the overlapping portion (8) is bent inward to form an engaging portion (6) that protrudes inward and extends in the axial direction. .

  The sheet (7) constituting the plate body (4) is made of a suitable magnetic or nonmagnetic metal. In this example, it is made of SS steel, which is a general structural steel. The thickness of the sheet (7) may be such that it can be formed in a cylindrical shape and can be held by an elastic force. In this example, it is about 0.24 mm. The joining means of the sheet (7) is arbitrary, but in this example, an adhesive and spot welding are used.

  The recess (41) is semicircular in this example, and is preferably formed at a symmetrical position 180 degrees away from the circumferential center of the flat portion (4a).

  Preferably, the bending angle of the engaging portion (6) is 90 degrees or more, and the angle α (see FIG. 6) formed between the engaging portion (6) and the adjacent sheet (7) is 90 degrees or less. . In this example, the angle α is about 45 degrees.

  Although the manufacturing method of the plate (2) is arbitrary, an example thereof will be described with reference to FIG.

  First, as shown in FIG. 9 (a), an engaging portion (6) is formed at one end of a rectangular sheet (7), and a circumferential positioning recess (41) is formed at one end. Then, the plate portion (5) is formed in a predetermined portion excluding the portions near the both ends of the sheet (7). Then, an appropriate adhesive (9) is applied to the surface opposite to the engaging portion (6) at the end of the sheet (7) on the engaging portion (6) side. Next, as shown in FIG. 9 (b), the sheet (7) is formed in a cylindrical shape, and the end (7a) of the opposite sheet (7) is superimposed on the outside of the adhesive (9). Further, the joint portion (8) is firmly joined by spot welding. In FIG.9 (b), (10) has shown the spot weld part. Then, the predetermined portion including the overlapping portion (8) is flattened by an appropriate means such as a press to form the flat portion (4a). The portion other than the flat portion (4a) of the plate body (4) becomes the cylindrical portion (4b) as it is. Formation of the plate on the plate portion (5), that is, plate making, may be performed on the plate portion (5) in the state of the sheet (7) in FIG. 9 (a), or in the cylindrical shape in FIG. 9 (b). You may perform with respect to the plate part (5) of the plate (2).

  The plate (2) can also be manufactured using a plate manufacturing apparatus as shown in FIGS. 10 and 11, the front side of the paper surface is the front and the back side is the rear.

  The plate manufacturing apparatus includes a cylinder (47) that rotates about a horizontal axis (46) extending in the front-rear direction. A part of the outer peripheral cylindrical surface of the cylinder (47) in the circumferential direction is removed to form a flat part (47a), and the remaining part is a cylindrical part (47b). The cylinder (47) is rotated at a relatively slow constant speed in the clockwise direction in the figure by an appropriate driving means.

  A square groove (48) extending in the front-rear direction is formed over the entire length of the flat portion (47a) on the front side in the rotational direction.In this groove (48), a rectangular columnar spot welding plate electrode (49 ) Is stopped. In this example, the electrode (49) is made of a copper alloy. The surface of the electrode (49) is flush with the flat portion (47a).

  A groove (50) in which the engaging portion (6) of the seat (7) is detachable in the axial direction is formed on the entire length of the front side in the rotational direction of the surface of the electrode (49). The opening of the groove (50) is located on the front side in the rotational direction from the bottom, and the angle α formed by the surface of the groove (50) and the electrode (49) is the angle formed by the seat (7) and the engaging portion (6). Equal to α.

  A square groove (51) extending in the front-rear direction is formed on the surface of the cylindrical portion (47b) on the opposite side of the flat portion (47a), and the size of the plate (2) to be manufactured is adjusted and the plate (2 A prismatic adjusting member (52) for facilitating the removal of) is fitted so as to be movable in the radial direction. The surface of the adjustment member (52) is the same cylindrical surface as the cylindrical portion (47b). The adjustment member (52) can move between an immersion position immersed radially inward from the cylindrical portion (47b) and a protruding position protruding radially outward from the cylindrical portion (47b), and is fixed at an arbitrary position. It has become so.

  A pressing plate member (53) extending in the front-rear direction is provided above the cylinder (47) so as to be movable in the vertical direction. A welding head (54) is provided above the plate member (53) so as to be movable in the horizontal direction and the vertical direction. A rod electrode (54a) for spot welding is provided at the lower end of the welding head (54). Although not shown, the plate member (53) is formed with a plurality of holes for receiving the electrodes (54a).

  An air cylinder (55) extending in the radial direction is arranged above the cylinder (47) slightly in front of the holding plate member (53) in the rotational direction, and the rod (55a) of the extended air cylinder (55) on the cylinder (47) side is arranged. An ironing roller (56) extending in the front-rear direction is attached to the tip so that it can freely rotate. The roller (56) is switched between a position away from the cylinder (47) and a position in pressure contact with the cylinder (47) by the operation of the air cylinder (55).

  Before the plate (2) is manufactured, as shown in FIG. 10, the pressing plate member (53) is separated upward from the cylinder (47), the roller (56) is pressed against the cylinder (47), and the adjusting member (52 ) Is fixed at the protruding position according to the dimensions of the plate (2) to be manufactured.

  In such a state, the engaging portion (6) of the seat (7) is fitted into the groove (50) of the cylinder (47), and then the cylinder (47) is rotated. When the cylinder (47) rotates, the roller (56) pressed against it is rotated, and when the sheet (7) reaches the position of the roller (56), the roller (56) causes the cylinder (47) to rotate. It is pressed against the surface of the film and formed into a shape that fits the surface. At the two boundary portions between the flat portion (47a) and the cylindrical portion (47b) of the cylinder (47), the sheet (7) is bent by the roller (56), whereby the flat portion ( 4a) and a cylindrical part (4b) are formed. When the sheet (7) is wound around the entire circumference of the cylinder (47) and both ends thereof are overlapped, as shown in FIG. 11, the rotation of the cylinder (47) is stopped, and the pressing plate member (53) Moves downward, and presses the overlapping portion (8) of the sheet (7) against the flat portion (47a) of the cylinder (47) and the surface of the plate electrode (49). In this state, the welding head (54) moves in the horizontal direction and the vertical direction, and spot welding of the overlapped portion (8) is performed through the hole portion of the pressing plate member (53). When the spot welding is completed, the adjustment member (52) is moved to the immersive position as shown by a chain line in FIG. As a result, a gap is formed between the manufactured plate (2) and the cylinder (47), so that the plate (2) can be moved to the front side and easily removed from the cylinder (47).

  When the plate (2) is manufactured using such a plate manufacturing apparatus, the plate (2) can be easily manufactured if the engaging portion (6) is provided.

  Next, the configuration of the plate mounting apparatus (3) will be described with reference to FIGS.

  In FIG. 1, reference numeral (11) denotes a bearing housing provided in a machine frame of a printing press (not shown). The front portion of the plate drive shaft (1) is rotatably supported by the bearing housing (11), and the rear portion is rotatably supported by a bearing housing (not shown) provided on the machine frame. The shaft (1) is rotated at a predetermined speed in a predetermined direction (clockwise as viewed from the front in this example) by known driving means. The portion near the front end of the shaft (1) protrudes forward from the bearing housing (11), and a tapered portion (1a) is formed at the front end of the shaft (1) on the front side of the bearing housing (11). Yes.

  The plate mounting device (3) is fixed to the shaft taper portion (1a) so as to be detachable.

  The plate mounting device (3) includes a plate cylinder portion (12) fixed to the shaft taper portion (1a). The plate cylinder part (12) has a cylindrical shape with a tapered hole (13) having a small front inner diameter formed at the center, and a cylindrical plate mounting surface (14) concentric with the shaft (1) is formed on the outer periphery thereof. Is formed. In order to reduce the weight, a plurality of locations (4 locations in this example) in the circumferential direction of the plate cylinder portion (12) are removed over the entire length. Accordingly, the plate cylinder part (12) includes a tapered tapered cylinder part (15) having a tapered hole (13) formed on the inner periphery, and an outer cylindrical part (16) formed with a plate mounting surface (14) on the outer periphery. And a plurality (four in this example) of connecting portions (17) for connecting them. The plate cylinder portion (12) is fixed to the shaft (1) in a state where the shaft taper portion (1a) is fitted in the taper hole (13), and rotates integrally with the shaft (1). The direction of rotation of the plate cylinder portion (12) is indicated by an arrow R in FIGS.

  In the portion corresponding to the upper connecting portion (17) of the outer cylindrical portion (16) of the plate cylinder portion (12), a part of the cylindrical surface is removed to form a flat plate fixing member mounting surface (18). A portion of the outer cylindrical portion (16) excluding the plate fixing member mounting surface (18) is a plate mounting surface (14). The plate portion (5) of the plate (2) is formed on the portion of the plate body (4) that is in close contact with the plate mounting surface (14) when the plate (2) is mounted on the plate cylinder portion (12). The circumferential length of the mounting surface (14) is longer than the circumferential length of the plate portion (5). The plate fixing member mounting surface (18) is located radially inward from the cylindrical surface including the plate mounting surface (14). A tapered tapered surface (19) is formed by chamfering at the front end of the plate mounting surface (14).

  As shown in FIG. 6, the inner peripheral dimension of the plate (2) is slightly larger than the outer peripheral dimension of the plate cylinder portion (12). That is, the inner diameter of the cylindrical portion (4b) of the plate (2) is slightly larger than the outer diameter of the plate mounting surface (14) of the plate cylinder portion (12), and the inner portion of the cylindrical portion (4b) of the plate (2). The circumference of the plate cylinder (12) is slightly larger than the circumference of the plate mounting surface (14), and the circumference of the flat portion (4a) of the plate (2) is the plate of the plate cylinder (12). It is slightly smaller than the circumference of the fixing member mounting surface (18).

  An annular axial positioning stopper (20) protruding slightly outward in the radial direction from the plate mounting surface (14) is fixed to the outer peripheral portion of the rear end surface of the cylindrical portion (16) of the plate cylinder portion (12).

  On the outer peripheral rear end of the plate mounting surface (14) opposite to the plate fixing member mounting surface (18), there is provided a circumferential positioning convex portion (42) that fits into the concave portion (41) of the plate (2). A plate fixing projection (43) extending in the axial direction is provided on the outer periphery of the plate mounting surface (14) on the front side of the convex portion (42). In this example, the convex part (42) and the protrusion (43) are provided in a prismatic block (44) which is fixed to the plate cylinder part (12) and forms a part of the plate cylinder part (12). The block (44) is fitted and fixed to a square groove (45) formed on the plate mounting surface (14) of the plate cylinder portion (12). The surface (outer peripheral surface) of the block (44) exposed from the groove (45) is cylindrical and constitutes a part of the plate mounting surface (14). And the convex part (42) and the processus | protrusion (43) are integrally formed in the outer peripheral surface of this block (44). The convex portion (42) of the plate cylinder portion (12) has the same shape as the concave portion (41) of the plate (2). The convex portion (42) and the protrusion (43) are preferably provided at symmetrical positions 180 degrees away from the circumferential center of the plate fixing member mounting surface (18). The protrusion (43) extends continuously or intermittently in the axial direction. In this example, the protrusion (43) is continuous over the entire length of the plate mounting surface (14). The front end of the block (44) is chamfered to form a part of the tapered tapered surface (19).

  A groove (21) is formed on the entire length in the axial direction of the portion on the front side in the rotational direction of the plate fixing member mounting surface (18) to avoid interference with the engaging portion (6) of the plate (2). The groove (21) is preferably formed to have a shape and dimensions that allow the engaging portion (6) to fit into a relatively large gap. In this example, the groove (21) is a corner groove.

  A first concave portion is provided in a portion on the rear side in the rotational direction from the groove (21) in the plate fixing member mounting surface (18). (Recess for plate fixing member) (22) is formed. The recess (22) has a long shape in the axial direction when viewed from the outside in the radial direction over the majority of the axial length of the plate fixing member mounting surface (18). The cross-sectional shape of the recess (22) is square, and the bottom wall and both side walls of the recess (22) are flat surfaces. In the middle of the length of the first recess (22), a second recess (wedge member recess) (23) shorter than the first recess (22) is part of the first recess (22). It is formed in a shape extending radially inward. The cross-sectional shape of the second recess (23) is square, and the bottom wall and both side walls of the recess (23) are flat surfaces.

  A plate fixing member (24) that is long in the front-rear direction is fitted in the first recess (22) so as to be movable in the radial direction of the shaft (1). The plate fixing member (24) fits in the recess (22) with almost no gap in the circumferential direction and the axial direction, and moves in the radial direction along both the circumferential side walls and the axial end walls of the recess (22). The end surface (24a) on the radially outer side of the plate fixing member (24) is a flat surface parallel to the plate fixing member mounting surface (18). The end surface (24a) may be a cylindrical surface having the same curvature as the plate mounting surface (14). A protruding portion (24b) that protrudes inward in the radial direction and fits in a radially outer portion of the second recess (23) is formed in the axially intermediate portion of the radially inner end face of the plate fixing member (24). . The end surface on the radially inner side of the protrusion (24b) is a wedge surface (24c) facing the radially inner side and the front side. Square grooves (25) are formed at two locations on the front and back of one side of the plate fixing member (24). A notch part (26) is formed in two front and rear portions of the upper part of one side wall of the recess (22), and a drop-out preventing member whose tip part projects into the recess (22) is formed in these notch parts (26). (27) is fixed. Each drop-off prevention member (27) is fitted to the plate fixing member (24) in the groove (25) with a gap in the front-rear direction and the radial direction, and the plate fixing member (24) is allowed to move in the radial direction. It comes to prevent.

  The wedge member (28) is fitted in the second recess (23) so as to be movable in the front-rear direction. The end surface on the radially inner side of the wedge member (28) is a flat surface and is in sliding contact with the bottom wall of the recess (23). The wedge member (28) fits in the recess (23) in the circumferential direction with almost no gap, and moves in the front-rear direction along the bottom wall and both side walls of the recess (23). The end surface on the radially outer side of the wedge member (28) is a wedge surface (28a) facing the wedge surface (24c) of the plate fixing member (24) and facing the radially outer side and the rear side. The wedge member (24) is formed with a female screw (29) extending rearward from the front end surface thereof.

  A first permanent magnet (30) is embedded and fixed in the wedge surface (24c) of the plate fixing member (24). A second permanent magnet (31) facing the first permanent magnet (30) is embedded and fixed in the bottom wall of the second recess (23). The first permanent magnet (30) and the second permanent magnet (31) are arranged so as to attract each other, and the plate fixing member (24) is urged radially inward by this magnetic attraction force (the plate fixing member ( The urging means is configured to press the wedge surface (24c) of 24) against the wedge surface (28a) of the wedge member (28).

  A screw member (32) extending in the front-rear direction is provided so as to penetrate the wall of the connecting portion (17) on the front side of the second recess (23). The screw member (32) is supported so as to rotate but not move forward and backward by a hole (33) penetrating the wall of the connecting portion (17) forward and backward and a bearing member (34) fixed to the front end surface thereof. ing. The screw member (32) includes a screw portion (35) supported by the hole (33) of the coupling portion (17) and the bearing member (34), and the screw portion (35) after passing the screw portion (35) through the bearing member (34). The head (36) is fixed to the front end of the part (35). The threaded portion (35) is supported by the hole (33) of the connecting member (17) and the bearing member (34), and at the rear of the threaded portion (35) extending in the second recess (23), a wedge member is provided. A male screw (37) that fits with the female screw (29) of (28) is formed. The head (36) protrudes forward from the connecting portion (17), and a number of fine detent protrusions (38) extending in the axial direction are formed on the outer peripheral surface thereof. The base end portion of the detent member (39) is fixed to the front end surface of the connecting portion (17). The anti-rotation member (39) is made of an elastic member such as a metal plate, and the claw (40) formed at the free end of the anti-rotation member (39) is between the protrusions (38) on the outer peripheral surface of the screw member head (36). The screw member (32) is prevented from rotating by being pressed against the portion.

  By rotating the screw member (32) in the pressing direction, the wedge member (28) moves to the pressing side (rear side), thereby moving the plate fixing member (24) to the pressing side (radially outer side). , By rotating the screw member (32) in the opposite direction of pressing release, the wedge member (28) moves to the pressing release side (front side), so that the plate fixing member (24) is moved to the pressing release side (diameter). Move inward). When the plate fixing member (24) moves to the most pressing side, the plate fixing member (24) protrudes radially outward from the cylindrical surface including the plate mounting surface (14), and when moved to the most pressing release side, the plate fixing surface (14) and the surface It is designed to immerse one or more radially inwards. The screw member (32) and the female screw (29) of the wedge member (28) constitute screw means for moving the wedge member (28) in the axial direction and fixing it at an arbitrary position.

  When the plate (2) is attached to the plate mounting device (3), as shown in FIGS. 4 and 6, the plate fixing member (24) is immersed flush with or inside the plate mounting surface (14). Fix to the immersive position and release the press without pressing the plate. In this state, the engaging portion (6) of the plate (2) corresponds to the groove (21) of the plate cylinder portion (12), and the cylindrical portion (4b) of the plate (2) is connected to the plate cylinder portion ( The plate (2) is placed on the plate mounting surface (14) of 12) so that the flat portion (4a) of the plate (2) corresponds to the plate fixing member mounting surface (18) of the plate cylinder (12). Fit the outer periphery of the cylinder part (12) from the front end side, and fit the concave part (41) of the plate (2) to the convex part (42) of the plate cylinder part (12) and the rear end of the plate (2). Contact the stopper (20). As a result, the plate (2) can be accurately and easily attached to a predetermined position of the plate cylinder portion (12). The inner circumference of the plate (2) is slightly larger than the outer circumference of the plate cylinder (12), and when the plate (2) is installed, the plate fixing member (24) is in the immersive position, so the plate cylinder (12) Further, there is a gap between the plate fixing member (24) and the plate (2), and the plate (2) can be easily attached to the plate cylinder portion (12). Further, since the dimension of the groove (21) in the plate cylinder part (12) is considerably larger than the dimension of the engagement part (6) of the plate (2), interference between the engagement part (6) and the plate cylinder part (12). The plate (2) can be easily attached to the plate cylinder part (12). When the plate (2) is attached, the screw member (32) is rotated in the pressing direction, the plate fixing member (24) is moved in the pressing direction, and the inner periphery of the joining portion (8) of the plate (2) To press the plate (2) radially outward. When a predetermined tension is applied to the plate (2) by the plate fixing member (24), the cylindrical portion (4b) of the plate (2) is closely fixed to the plate mounting surface (14), and the protrusion (43) Bites into the cylindrical portion (4b), and the plate (2) is fixed. When the plate (2) is fixed to the plate mounting surface (14), the rotation of the screw member (32) is stopped, and the plate (2) is fixed at that position by the rotation preventing member (39). Thereby, the mounting of the plate (2) is completed. At this time, the entire plate portion (5) is in close contact with the plate mounting surface (14) via the plate body (4).

  At the time of printing, the plate cylinder part (12) is rotated while the plate (2) is fixed to the plate cylinder part (12) as described above. At this time, the plate (2) is tightly fixed to the plate mounting surface (14) by the plate fixing member (24), and the concave portion (41) of the plate (2) and the convex portion (42) of the plate cylinder portion (12). And the projection (43) of the plate cylinder part (12) bites into and fixes the cylindrical part (4b) of the plate (2), so that the position of the plate (2) does not shift. . In addition, since the claw (40) of the locking member (39) bites into the portion between the protrusions (38) of the screw member head (36) by elastic force, the screw member (32) rotates due to vibration or the like. There is no end to it.

  When removing the plate (2) attached to the plate cylinder part (12) as described above, the screw member (32) is rotated in the pressing release direction, and the plate fixing member (24) is moved in the pressing release direction. Fix in the immersive position. This creates a gap between the plate cylinder (12) and the plate fixing member (24) and the plate (2), and the plate (2) is moved in the axial direction so that it can be easily removed from the tip of the plate cylinder (12). Can be removed.

  The angle of the tip of the projection (43) is determined so as to sufficiently bite into the cylindrical portion (4b) of the plate (2) and securely fix it. In this example, it is about 90 degrees. The height of the protrusion (43) is preferably as small as possible as long as the protrusion (43) sufficiently bites into the cylindrical portion (4b) of the plate (2) and securely fixes it. In this example, it is about 0.5 to 1 mm.

  The overall configuration of the printing machine, the plate mounting device (3), and the plate (2) and the configuration of each unit are not limited to those of the above-described embodiment, and can be changed as appropriate.

  In the above embodiment, the screw member (32) is manually rotated, but may be rotated by power such as electric power.

  In the above embodiment, the wedge member is moved in the axial direction and the plate fixing member is moved in the radial direction. However, the plate fixing member may be moved in the radial direction manually or directly by power. In the above embodiment, the plate (2) is pushed from the radially inner side to the radially outer side by moving the plate fixing member in the radial direction.For example, by rotating the eccentric fixing member, The plate (2) may be pushed from the radially inner side to the radially outer side.

Claims (7)

  A cylindrical plate body is formed by overlapping and joining both ends of a rectangular elastic material sheet, a predetermined portion including the overlapping portion of the plate body is flat, and the remaining portion is cylindrical. A printing plate characterized in that a circumferential positioning recess is formed at one end of a cylindrical portion opposite to the overlapping portion, and a plate portion is provided at a predetermined location on the outer peripheral surface of the cylindrical portion. .   2. The printing plate according to claim 1, wherein an end portion of the sheet positioned inside the overlapped portion is bent inward to form an engaging portion. In order to mount the plate according to claim 1, a device fixedly provided on a plate drive shaft of a printing press,
A plate cylinder portion is provided that is fixed to the plate drive shaft and has a cylindrical plate mounting surface on the outer periphery on which the plate is mounted from the front end side of the plate drive shaft. A part of the direction is removed to form a flat plate fixing member mounting surface located radially inward from the cylindrical surface including the plate mounting surface, and the end of the plate on the outer periphery of the base end of the plate cylinder unit An axial positioning stopper that is in contact with the outer periphery of the plate mounting surface on the opposite side of the plate fixing member mounting surface, and a circumferential positioning convex portion that fits in the circumferential positioning concave portion of the plate at the base end portion; A plate-fixing projection extending in the axial direction is provided, and the plate-shaped cylindrical portion of the plate is pressed onto the plate-fixing member mounting surface by pressing the flat portion of the plate mounted on the plate cylinder portion from the radially inner side to the radially outer side. Fix the plate tightly to the plate mounting surface of the cylinder and fix the plate The plate plate fixing member printing machine plate loading device, wherein a is provided to fix by bite into the cylindrical portion of the.   4. A plate mounting apparatus for a printing press according to claim 3, wherein a groove is formed on the plate fixing member mounting surface to avoid interference with the engaging portion of the plate of claim 2.   5. The plate fixing member is capable of moving between a position recessed inside from a plate fixing member mounting surface and a position protruding outward and can be fixed at an arbitrary position. Plate mounting device for printing press.   6. The plate mounting device for a printing press according to claim 5, wherein the plate fixing member is fitted in a recess for the plate fixing member formed on the plate fixing member mounting surface so that the plate fixing member can move in a radial direction.   A wedge member having a wedge surface radially outward is fitted into a recess for a wedge member formed at the bottom of the recess of the plate fixing member mounting surface so that the wedge member can move in the axial direction. Is provided with screw means for moving the roller in the axial direction and stopping it at an arbitrary position, and a wedge surface abutting on the wedge surface of the wedge member is formed on the radially inner side of the plate fixing member. A biasing means is provided between the plate fixing member and the plate fixing member to press the wedge surface of the plate fixing member against the wedge surface of the wedge member by biasing the plate fixing member radially inward using a permanent magnet. 7. A printing plate mounting apparatus according to claim 6, wherein

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