JP3198481U - Blanket or printing plate fixing device - Google Patents

Abstract

A blanket or printing plate fixing device for restraining a holding side and a holding bottom side of a blanket or a printing plate that easily deforms a deformable member inserted in a restriction groove in a direction perpendicular to the longitudinal direction thereof. For example, a plate spring 30 is inserted as a deformable member in the direction of the body axis of a restraining groove 21 into which a blanket 10 or a holding side 11a and a holding bottom side 11b of a printing plate are inserted, and the leaf spring is elongated by a pressing member. In a blanket or printing plate fixing device that restrains the holding side and the holding bottom side of the blanket or printing plate by a plate spring by being deformed in a direction perpendicular to the direction, a sliding plate having a sliding surface 41 on a surface in contact with the plate spring 40 was inserted in the body axis direction of the restraint groove 21. [Selection] Figure 4

Description

  The present invention relates to a blanket or printing plate fixing device for fixing a blanket or printing plate wound around a cylinder in a rotary press.

  In a rotary press for printing newspapers and the like, printing is performed by a blanket wound around a blanket cylinder transferring ink transferred from a printing plate wound around a plate cylinder while rotating to a running paper.

  Conventionally, as a method of winding and fixing a blanket or printing plate around a blanket cylinder or plate cylinder, a restraining groove is formed in the blanket cylinder or plate cylinder, and the holding side of the blanket or printing plate is hooked into the restraining groove, and the gripper side There is a known method for fixing. And the fixing device for ensuring the fixation is disclosed by patent document 1. FIG. The fixing device of this patent document 1 presses a press-fitting body into a restraining groove (insertion groove) into which a holding side (leading end) and a holding bottom side (rear-end end) of the blanket are inserted, whereby the holding side and the holding side of the blanket. The bottom side is pressed against the wall surface of the restraint groove and fixed. However, it is not enough to fix the blanket or printing plate by simply press-fitting the press-fitting body. In particular, under the printing conditions in which the blanket cylinder or plate cylinder is rotated at a higher speed, the blanket or printing plate loosens and printing defects occur. There was a thing.

  On the other hand, the applicant of the present application in Patent Document 2 inserts a leaf spring in the trunk axis direction of the restraining groove, and deflects (deforms) the leaf spring in a direction perpendicular to the longitudinal direction by the pressing member. A fixing device that can firmly restrain the holding side and the holding bottom side of the blanket or printing plate by a leaf spring has been disclosed. However, in Patent Document 2, in order for the leaf spring to be deformed in a direction orthogonal to the longitudinal direction, the leaf spring needs to move so as to contract in the body axis direction of the restraint groove. Since the gripper side and gripper bottom side are inserted, the leaf spring cannot move smoothly due to the frictional resistance with the gripper side or gripper bottom side, and as a result, the leaf spring is deformed in a direction perpendicular to the longitudinal direction. There is a problem in that it is difficult to obtain a sufficient restraining force.

JP 2002-326341 A Japanese Patent No. 5308561

  The problem to be solved by the present invention is that a deformable member such as a leaf spring is inserted in the body axis direction of the restraining groove into which the holding side and the holding bottom side of the blanket or printing plate are inserted, and this deformable member is pressed against the pressing member. The deformable member inserted into the restraining groove in the blanket or printing plate fixing device which restrains the holding side and the holding bottom side of the blanket or the printing plate by the deformable member by deforming in a direction perpendicular to the longitudinal direction by Is to be easily deformed in a direction perpendicular to the longitudinal direction.

  The fixing device of the present invention is a blanket or printing plate fixing device for fixing a blanket or printing plate wound around a cylinder in a rotary press, and is formed on the cylinder, and the holding side of the blanket or printing plate is hooked, A restraining groove into which the gripper side is inserted, a deformable member to be inserted in the body axis direction of the restraint groove, a longitudinal end of the deformable member is pressed toward the longitudinal center, and the deformable member is A pressing member that is deformed in a direction orthogonal to the longitudinal direction, and a slip that is inserted in contact with the deformable member in the body axis direction of the restraining groove, and that promotes slippage of the deformable member on a surface that contacts the deformable member And a sliding plate having a surface.

  In the present invention, “cylinder” is a general term for a blanket cylinder and a plate cylinder.

  According to the present invention, since the sliding plate having the sliding surface on the surface in contact with the deformable member is inserted in the trunk axis direction of the restraining groove, the deformable member is smoothly smooth along the sliding surface of the sliding plate in the trunk axis direction. And can be easily deformed in a direction perpendicular to the longitudinal direction. Therefore, the restraining force due to the deformation of the deformable member can be sufficiently exerted, and the blanket or the printing plate can be more reliably fixed.

1 is a side view of a blanket cylinder to which a fixing device according to an embodiment of the present invention is applied. It is a front view of the principal part of the blanket cylinder of FIG. It is AA sectional drawing of FIG. It is an expansion explanatory view of the principal part of the blanket cylinder of FIG. The shape of the leaf | plate spring used as a deformable member in the Example of FIG. 1 is shown, (a) is a perspective view, (b) is BB sectional drawing of (a). It is expansion explanatory drawing of the principal part which shows the modification of this invention. It is a perspective view which shows the other example of a leaf | plate spring.

  Embodiments of the present invention will be described below based on the embodiments shown in the drawings.

  1 is a side view of a blanket cylinder to which a fixing device according to an embodiment of the present invention is applied, FIG. 2 is a front view of the main part of the blanket cylinder of FIG. 1, FIG. 3 is a cross-sectional view taken along line AA of FIG. FIG. 2 is an enlarged cross-sectional view of a main part of the blanket cylinder of FIG. 1.

  The fixing device of this embodiment fixes the blanket 10 to the blanket cylinder 20. For example, two blankets 10 each having a circumference of one page and a width of two pages are wound around the blanket cylinder 20 in parallel in the cylinder axis direction.

  As shown in FIG. 4, the blanket 10 is a so-called metal blanket in which one surface of a metal plate 11 is covered with a rubber blanket sheet 12 except for both end portions (a holding side 11 a and a holding bottom side 11 b). The holding side 11 a is hooked on the wall surface of the restraining groove 21 formed in the blanket cylinder 20, and the holding bottom side 11 b is inserted into the restraining groove 21, so that the blanket cylinder 20 is wound.

  A leaf spring 30 as a deformable member is inserted into the restraining groove 21 over the entire length in the trunk axis direction, and a sliding plate 40 is inserted over the entire length in the trunk axis direction so as to be in contact with the plate spring 30. In the present embodiment, one side surface 30 a of the leaf spring 30 is in contact with the holding bottom side 11 b of the blanket 10, and the other side surface 30 b is in contact with the sliding plate 40. The sliding plate 40 is formed with a sliding surface 41 on the surface in contact with the other side surface 30 b of the plate spring 30 to promote the sliding of the plate spring 30. In this embodiment, the sliding surface 41 is formed by subjecting one surface of the sliding plate 40 made of an aluminum plate to hard alumite treatment and impregnating it with a fluororesin. However, the present invention is not limited to this. For example, the sliding plate 40 may be made of a steel plate, and the sliding surface 41 having even lower friction and excellent wear resistance may be formed by diamond coating.

  Since the leaf spring 30 and the sliding plate 40 are inserted into the restraining groove 21 in addition to the holding side 11a and the holding bottom side 11b of the blanket 10 as described above, the plate spring 30 and the sliding plate 40 are inserted. In order to secure a space, a groove extension portion 21a is formed. And in order to form (process) this groove expansion part 21a, the notch part 22 (refer FIG. 4) is formed in the outer peripheral part of the blanket cylinder 20 in the cylinder axis direction. After forming (processing) the groove expanding portion 21 a, the filling member 23 is attached to the notch portion 22 with a hexagon socket head bolt 24.

  On the other hand, the leaf spring 30 has a corrugated shape that undulates along the longitudinal direction as shown in FIG. That is, the leaf spring 30 has a corrugated shape in which the apex 31a on the side surface 30a side and the apex 31b on the other side surface 30b side alternately appear in the longitudinal direction. As described in FIG. 4, the leaf spring 30 is inserted so that one side surface 30a is in contact with the holding bottom side 11b of the blanket 10. Therefore, in the leaf spring 30 having a corrugated shape, the side surface 30a side. The apex 31a portion is in contact with the holding butt side 11b of the blanket 10. Then, at the apex 31a portion on the one side surface 30a side, the corner portion on the trunk outer peripheral side (the outer peripheral side of the restraining groove 21) is chamfered to form a chamfered portion 32 (see FIGS. 4 and 5B). .

  The natural length of the leaf spring 30 in the longitudinal direction is about several mm longer than the length of the restraining groove 21 in the trunk axis direction. Therefore, when the leaf spring 30 is simply inserted into the restraining groove 21, one end in the longitudinal direction of the leaf spring 30 protrudes from the end of the restraining groove 21. Then, as shown in FIG. 3, one end of the leaf spring 30 in the longitudinal direction is pressed by the pressing member 50 toward the central portion in the longitudinal direction, and the leaf spring 30 is bent and deformed in a direction perpendicular to the longitudinal direction.

  The pressing member 50 is held by a semi-ring-shaped holding member 60 detachably mounted on the side surface of the blanket cylinder 20 using a hexagon socket head bolt 61 so as to be movable in the cylinder axis direction. That is, the holding member 60 is formed with a through hole 60a along the trunk axis direction, and the pressing member 50 is attached to the through hole 60a. The holding member 60 is formed with an opening 60b that communicates with the through hole 60a, and the pressing member 50 is attached to the through hole 60a through the opening 60b. In this embodiment, in order to maintain the balance of the blanket cylinder 20 during printing, a semi-ring-shaped holding member 60 ′ is also mounted symmetrically with the half-ring-shaped holding member 60. 60 and 60 'may be integrated.

  A slit portion 51 for fitting one end in the longitudinal direction of the leaf spring 30 is formed at one end in the body axis direction of the pressing member 50, and the tip of a screw member 70, which is a hexagon socket head bolt, is formed at the other end in the body axis direction. A recess 52 for fitting is formed. The screw member 70 is screwed into the through hole 60a of the holding member 60 so as to be movable in the trunk axis direction. That is, when the screw member 70 is screwed toward the pressing member 50 side, the pressing member 50 presses one end in the longitudinal direction of the leaf spring 30 toward the central portion in the longitudinal direction. Note that a lock nut 71 for preventing loosening is attached to the screw member 70.

  Next, an example of how to use the fixing device of this embodiment will be described.

  First, the sliding plate 40 is inserted into the groove expanding portion 21 a of the restraining groove 21 from the side surface of the blanket cylinder 20 with the holding member 60 removed. At this time, the sliding plate 40 is inserted so that the sliding surface 41 faces the restraining groove 21 side. Subsequently, the leaf spring 30 is inserted into the groove expanding portion 21 a of the restraining groove 21 from the side surface of the blanket cylinder 20 in the same manner. At this time, the leaf spring 30 is inserted so that the other side surface 30 b contacts the sliding surface 41 of the sliding plate 40.

  Thereafter, when the holding member 60 is attached to the side surface of the blanket cylinder 20, the pressing member 50 is attached to the through hole 60a of the holding member 60 through the opening 60b as described above, and the leaf spring is attached to the slit portion 51 of the holding member 60. One end in the longitudinal direction of 30 is fitted. In this state, when the holding member 60 is attached to the blanket cylinder 20 with the hexagon socket head cap bolt 61 and then the screw member 70 is screwed toward the pressing member 50, one end in the longitudinal direction of the leaf spring 30 is pressed by the pressing member 50. Is pressed toward the longitudinal center. When the amount to be pressed is fixed, when the holding member 60 is mounted on the blanket cylinder 20 without using the screw member 70, one end in the longitudinal direction of the leaf spring 30 is pressed by the pressing member 50 fixed to the holding member 60. May be pressed toward the center in the longitudinal direction.

  Thereby, the leaf | plate spring 30 deform | transforms so that it may bend in the direction orthogonal to a longitudinal direction. At this time, since the other side surface 30b of the leaf spring 30 is in contact with the sliding surface of the sliding plate 40, the leaf spring 30 can move smoothly and is easily bent and deformed in a direction perpendicular to the longitudinal direction. can do. Therefore, when the holding side 11a and the holding bottom side 11b of the blanket 10 are inserted into the restraining groove 21 during printing, the restraining force due to the deformation of the leaf spring 30 can be sufficiently exerted, and the blanket 10 can be fixed securely. Since the leaf spring 30 has a corrugated shape as shown in FIG. 5A, when the holding side 11a and the holding bottom side 11b of the blanket 10 are inserted into the restraining groove 21, one of the leaf springs 30 is provided. The apex 31a portion on the side surface 30a side contacts the holding butt 11b of the blanket 10 (see FIG. 3).

  On the other hand, in a state before the holding side 11 a and the holding bottom 11 b of the blanket 10 are inserted into the restraining groove 21, the apex 31 a portion on the one side face 30 a side of the leaf spring 30 is located in the restraining groove 21. Since the groove width of the restraining groove 21 is desired to be as narrow as possible, the space for inserting the holding side 11a and the holding bottom 11b of the blanket 10 is limited, and there is a leaf spring 30 (vertex 31a portion) in the restraining groove 21. It may be difficult to insert the holding side 11a and the holding bottom 11b of the blanket 10. In this respect, in the present embodiment, as described above, the corner portion on the trunk outer peripheral side (the outer peripheral side of the restraining groove 21) of the apex 31a portion is chamfered to form a chamfered portion 32 (FIGS. 4 and 5B). See), the holding side 11a and the holding butt 11b of the blanket 10 can be easily inserted. The chamfered portion 32 is not limited to the apex 31a portion, and may be formed over the entire length of the corner portion on the trunk outer peripheral side (the outer peripheral side of the restraining groove 21) of one side surface 30a.

  In the embodiment, the leaf spring 30 is in contact with the holding butt 11b of the blanket 10, but the sliding plate 40 may be in contact with the holding butt 11b of the blanket 10, as shown in FIG. In this case, the sliding plate 40 is inserted so that the sliding surface 41, which is one side surface, is in contact with the leaf spring 30 and the other side surface is in contact with the holding bottom 11 b of the blanket 10. As a configuration corresponding to the chamfered portion 32 shown in FIG. 4, at least a portion of the other side surface of the sliding plate 40 in contact with the holding butt 11 b of the blanket 10 that is in contact with the holding butt 11 b side of the blanket 10. The chamfered portion 42 is formed by chamfering the corner portion. In the example of FIG. 6, the other side surface of the sliding plate 40 in contact with the holding butt 11 b of the blanket 10 is not a sliding surface. This is because if the other side surface is a sliding surface, the gripper bottom 11b of the blanket 10 may slip out during printing. Further, in the example of FIG. 6, the sliding plate 40 may also be arranged on the other side surface side of the leaf spring 30 according to FIG. 4.

  In the embodiment, the groove expanding portion 21 a of the restraining groove 21 is formed on the insertion end 11 b insertion side of the blanket 10, and the gripping bottom 11 b of the blanket 10 is restrained by the leaf spring 30. The extended portion 21 a may be formed on the insertion side 11 a insertion side of the blanket 10, and the holding side 11 a of the blanket 10 may be restrained by the leaf spring 30 or the sliding plate 40. However, since the constraining groove 21 is usually acute with respect to the surface of the blanket cylinder 20, the configuration of the embodiment is preferable from the viewpoint of securing the strength of the blanket cylinder 20. On the other hand, as long as the constraining groove 21 makes the angle with respect to the surface of the blanket cylinder 20 close to a right angle, the groove expanding portion 21a may be provided on either side.

  Further, in the embodiment, the leaf spring 30 having a corrugated shape as shown in FIG. 5A is used, but a flat leaf spring 30 is used as shown in FIG. As shown by a broken line in FIG. In the embodiment, the natural length of the leaf spring 30 is set to be several mm longer than the length of the restraining groove 21 so that one end in the longitudinal direction of the leaf spring 30 protrudes from the end of the restraining groove 21. One end of the leaf spring 30 in the longitudinal direction is not necessarily required to protrude from the end of the restraining groove 21. In any case, it is only necessary that one end of the leaf spring 30 in the longitudinal direction is pressed by the pressing member 50 toward the central portion in the longitudinal direction and the leaf spring 30 can be deformed in a direction perpendicular to the longitudinal direction.

  Moreover, in the Example, although the leaf | plate spring was used as a deformable member, it is not limited to this, For example, you may use a rubber plate. In this case, one end in the longitudinal direction of the rubber plate is pressed by the pressing member 50 toward the central portion in the longitudinal direction, and the rubber plate is deformed so as to expand in a direction orthogonal to the longitudinal direction. In short, the deformable member in the present invention can be deformed in a direction orthogonal to the longitudinal direction by pressing one end of the longitudinal direction toward the center in the longitudinal direction by the pressing member in a state of being inserted into the restraining groove. Any member may be used.

  Further, the embodiment is an example in which two blankets 10 each having a circumference of one page × two pages are wound around the blanket cylinder 20 in parallel in the cylinder axis direction, and the constraining groove is formed in the cylinder axis direction of the four-page width blanket cylinder 20. 21 is provided in a straight line, but a two-page width constraining groove may be provided with the phase shifted in the circumferential direction of the cylinder. In this case, one end in the longitudinal direction of the deformable member inserted into each constraining groove is pressed toward the central portion in the longitudinal direction from the side surface of the trunk.

  Further, the width of the cylinder may be two pages instead of four pages. In this case, it is possible to wind one blanket having a width of two pages and press both ends in the longitudinal direction of the deformable member toward the central portion in the longitudinal direction from both side surfaces of the cylinder.

  In the above embodiment, the case where the blanket is fixed has been described. However, it is obvious that the printing plate can be fixed in the same manner.

DESCRIPTION OF SYMBOLS 10 Blanket 11 Metal plate 11a Holding side 11b Holding bottom side 12 Blanket sheet 20 Blanket cylinder 21 Restraining groove 21a Groove expansion part 22 Notch part 23 Filling member 24 Hexagon socket head cap screw 30 Plate spring (deformable member)
30a One side surface 30b The other side surface 31a, 31b Apex 32 Chamfered portion 40 Sliding plate 41 Sliding surface 42 Chamfered portion 50 Pressing member 51 Slit portion 52 Recessed portion 60, 60 ′ Holding member 60a Through hole 60b Opening portion 61 Hexagon socket head bolt 70 Screw member 71 Lock nut

Claims (7)

A blanket or printing plate fixing device for fixing a blanket or printing plate wound around a cylinder in a rotary press,
A constraining groove formed on the cylinder, to which the holding side of the blanket or printing plate is hooked, and into which the holding bottom side is inserted;
A deformable member inserted in the direction of the trunk axis of the restraining groove;
A pressing member that presses one end in the longitudinal direction of the deformable member toward a central portion in the longitudinal direction and deforms the deformable member in a direction orthogonal to the longitudinal direction;
A blanket or printing plate comprising a sliding plate that is inserted so as to be in contact with the deformable member in the body axis direction of the constraining groove and has a sliding surface that promotes the sliding of the deformable member on the surface in contact with the deformable member Fixing device.   2. The deformable member is inserted such that one side surface is in contact with the holding side or holding edge side of the blanket or printing plate and the other side surface is in contact with the sliding surface of the sliding plate. Blanket or printing plate fixing device.   The blanket or printing plate according to claim 2, wherein at least one of the side surfaces of the deformable member is chamfered at a corner on the cylinder outer peripheral side at a portion contacting the holding side or the holding bottom side of the blanket or printing plate. Fixing device.   The deformable member has a corrugated shape that undulates along the longitudinal direction, and the apex portion on the one side surface side of the corrugated shape is in contact with the holding side or the holding bottom side of the blanket or printing plate, and the body at the apex portion The blanket or printing plate fixing device according to claim 3, wherein corners on the outer peripheral side are chamfered.   The sliding plate has the sliding surface only on one side surface, one side surface of the sliding surface is in contact with the deformable member, and the other side surface is on the holding side or the holding bottom side of the blanket or printing plate. The blanket or printing plate fixing device according to claim 1, which is inserted so as to contact.   The blanket or printing plate according to claim 5, wherein a corner of the cylinder outer peripheral side of at least a portion of the other side surface of the sliding plate that is in contact with the holding side or the holding bottom side of the blanket or the printing plate is chamfered. Fixing device.   The blanket or printing plate fixing device according to any one of claims 1 to 6, wherein the sliding surface of the sliding plate is formed of a fluororesin or a diamond coating.

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