JP2008183887A - Locking construction of plate member for printing, method for mounting and method for removing of plate member for printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hold a plate member for printing in a small space into the thickness direction of a printing torso and to easily detach and attach it while stopping the magnitude of a gap relating to a locking construction of a plate member for printing, a method for mounting and to provide a method for removing a plate member for printing. <P>SOLUTION: A first shaft-like member 52 and a second shaft-like member 53 are equipped in a fastening groove 51 formed in the inside of the periphery 1a of a printing torso 1. The notch surface 52b of a shaft-like member 52 and the concave 53b of a shaft-like member 53 are made to counter, and thereby a hold seat (kuwaejiri) side bent portion 2b of a plate member 2 for printing is inserted between both these 52b and 53b from an orifice 51a to the inside of a fastening groove 51. A shaft-like member 52 is rotated to keep a hold seat (kuwaejiri) side bent portion 2b gripped and fixed by the cylindrical outer peripheral surface 52a of a shaft-like member 52 and the concave 53b of a shaft-like member 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printing plate-like member fixing structure suitable for fixing a plate to a plate cylinder and a blanket to a blanket cylinder, and a method for attaching a printing plate member using this fixing structure. And a removal method.

  In the printing machine, for example, as shown in FIG. 4, a structure for fixing a flexible printing plate member 2 such as a printing plate or blanket to a printing cylinder 1 such as a plate cylinder or a blanket cylinder (plate clamping structure) Etc.) have been developed. In such a fixing structure of the printing plate-like member 2, a tension bar is usually provided on the outer periphery of the printing cylinder 1 along the axial direction, and bent at one end of the plate-like member 2. The tail-side bent portion and the tail-end bent portion bent at the other end are respectively inserted and locked using a tension bar or the like.

  As the locking structure of the grip-side bent portion, it is possible to engage with the edge of the locking groove or the edge of the locking groove and the surface of the tension bar (for example, Patent Document 1), or press contact with the edge of the locking groove. (For example, Patent Documents 2 to 4). As the locking structure of the tail edge side bent portion, a locking claw portion is provided by further bending the tip of the tail edge side bent portion, and this claw portion is inserted into a locking groove. A tension bar is rotated by being locked to the hook portion to apply a tensile force to the plate-like member 2 (for example, Patent Document 1), or a slit ( Insertion groove) and the like, and the tail edge side bent portion is inserted into the slit and the tension bar is rotated to bend and deform the tail edge side bent portion to apply a tensile force to the plate-like member 2. Some have been made (for example, Patent Documents 3 and 4).

5 and 6 are schematic cross-sectional views each showing an example of a conventional printing plate-like member fixing structure using each of such locking structures.
In the structure shown in FIG. 5, the locking groove 31 formed along the axial direction on the outer periphery of the printing cylinder 1 has a slight size in order to suppress the so-called gap size on the outer peripheral surface 1 a of the printing cylinder 1. An opening (gap) 31a limited to a width, a space 31b having a circular cross section formed at the back of the opening 31a, and an outer peripheral surface of the printing cylinder 1 formed at one edge of the opening 31a. 1a and a holding-side locking surface 31c forming an acute angle.

The tension bar 32 provided in the space 31b of the locking groove 31 is a rod-shaped member having a circular cross section smaller in diameter than the space 31b and rotatable in the space 31b, and is notched along the axial direction thereof. 32a is formed, and a hook portion 32b is formed at one edge of the notch 32a along the axial direction.
The printing plate-like member (in this case, the printing plate) 21 is formed of a metal plate, and a tail-side bent portion 21a is bent at one end, and a tail-end bent portion 21b is provided at the other end. It is bent in the body direction with 21a. Further, a claw portion 21c is formed at the tip of the tail edge side bent portion 21b by bending in the same direction.

  When the plate-like member 21 is fixed, first, the tail-side bent portion 21a is inserted into the locking groove 31, and the outer peripheral surface 1a of the printing cylinder 1 and the tail-side locking surface 31c that form an acute angle with each other. And abut. In this state, the plate-like member 21 is wound around the outer peripheral surface 1 a of the printing cylinder 1, and the tail edge side bent portion 21 b is inserted into the locking groove 31. At this time, as shown by a two-dot chain line in FIG. 5, the tension bar 32 is in a state in which the hook portion 32b is retracted into the locking groove 31 so as not to interfere with the tail edge side bent portion 21b.

  Next, a portion of the printing plate-like member 21 in the vicinity of the tail edge side bent portion 21 b is joined to the outer peripheral surface 1 a of the printing cylinder 1, and the tail edge side bent portion 21 b is sufficiently advanced into the locking groove 31. Then, the tension bar 32 is rotated in the direction indicated by the arrow A1 in FIG. 5 to be in the state indicated by the solid line, and the hook portion 32b locks the claw portion 21c at the tip of the tail edge side bent portion 21b. At this time, the claw portion 21c at the tip of the tail edge side bent portion 21b is pulled through the hook portion 32b to apply a tensile force to the plate member 21. As a result, both the tail-side bent portion 21 a and the tail-end bent portion 21 b are fixed to the outer peripheral surface 1 a of the printing cylinder 1 through the locking groove 31 and the tension bar 32.

  In the structure shown in FIG. 6, the locking groove 41 has an opening (gap) 41a, a circular space 41b, and a grip-side locking surface 41c, substantially the same as that shown in FIG. However, the opening 41a is formed narrower than that shown in FIG. On the other hand, the tension bar 42 is a rod-shaped member that has a circular cross section slightly smaller in diameter than the space 41b and is rotatable in the space 41b, and has a depth to the vicinity of the axis along the axial direction thereof. A slit-shaped groove 42a is formed.

  The printing plate-like member (in this case, a blanket) 22 is also formed of a metal plate, and a tail-end bending portion 22a is bent at one end, and a tail-end bending portion 22b is provided at the other end. And bend in the trunk direction. There is no claw at the tip of the tail edge side bent portion 22b, and the tail edge side bent portion 22b is formed flat. The tail-side bent portion 22a is sufficiently deep so that the tail-side bent portion 22b can penetrate deeply into the slit-like groove 42a of the tension bar 42 so that the tail-side bent portion 22a can enter deeply into the tail-side locking surface 41c. Length is secured.

  When the plate-like member 22 is fixed, first, the tail-side bent portion 22a is inserted into the locking groove 41, and the outer peripheral surface 1a of the printing cylinder 1 and the tail-side locking surface 41c that form an acute angle with each other. And abut. In this state, the plate-like member 22 is wound around the outer peripheral surface 1 a of the printing cylinder 1, and the tail edge side bent portion 22 b is inserted into the locking groove 41. At this time, as shown by a two-dot chain line in FIG. 6, the tension bar 42 is in a state in which the slit-like groove 42a faces the opening 41a, and the tail edge-side bent portion 22b that has entered from the opening 41a has a slit-like shape. So as to enter the groove 42a.

When the portion near the tail edge side bent portion 22b of the printing plate-like member 22 is joined to the outer peripheral surface 1a of the printing cylinder 1, and the tail edge side bent portion 22b is sufficiently advanced into the slit-like groove 42a, The tension bar 42 is rotated in the direction indicated by the arrow A2 in FIG. 6 to be in the state indicated by the solid line, and the intermediate portion of the tail edge-side bent portion 22b is squeezed by the opening edge portion 42b of the slit-like groove 42a. While bending and deforming, the tail edge side bent portion 22b is pulled through the opening edge portion 42b, and a tensile force is applied to the plate-like member 22. As a result, both the tail-side bent portion 22 a and the tail-end bent portion 22 b are fixed to the outer peripheral surface 1 a of the printing cylinder 1 through the locking groove 41 and the tension bar 4.
JP 7-285214 A JP 2000-6372 A JP 2005-280029 A JP 2006-51634 A

However, the above-described prior art has the following problems particularly with respect to the locking structure of the tail edge side bent portion 22b.
As shown in FIG. 5, a locking claw portion 21 c is provided by further bending the tip of the tail edge side bent portion 21 b, and the hook of the tension bar 32 inserted in the locking groove 31. In the structure of locking to the portion 32c, the claw portion 21c needs to be bent. In particular, when a steel material such as stainless steel is used as the metal plate of the plate member for printing, since it is difficult to bend if the bending length is short, the length of the claw portion 21c is required to enable this bending process. It is necessary to secure a certain level or more.

However, in the case where the length of the claw portion 21c is ensured more than a certain value as described above, the opening portion (gap) 31a is not enlarged because the claw portion 21c is inserted into the locking groove 31 according to the length of the claw portion 21c. must not. If the gap is increased, problems such as an increase in paper loss due to an increase in non-printing length and an increase in vibration due to an increase in gap shock occur.
That is, with such a locking structure, it has been difficult to ensure both workability and printing performance.

  Further, as shown in FIG. 6, a slit 43a or the like is formed in the tension bar 42 inserted in the locking groove 41, and the tail edge side bent portion 22b is inserted and locked inside the slit 42a or the like. Since the structure does not require a locking claw portion that further bends the tip of the tail edge side bent portion 22b, the opening (gap) can be reduced, but the diameter of the tension bar must be set large.

That is, in this structure, slitting is required, but if the diameter of the tension bar is small, slitting becomes difficult, so the diameter of the tension bar must be large enough to allow slitting.
Also, since the metal plate of the printing plate-like member is plastically deformed in the slit, when removing the printing plate-like member from the printing cylinder, the tension bar is rotated backward to lock the tail-end bending portion. It is necessary to forcibly jump out of the groove, and in order to push the plastically deformed metal plate out from the narrow opening (gap), the tension bar is required to have appropriate rigidity. In particular, if slit processing is performed on the tension bar, the rigidity of the tension bar is likely to decrease. Therefore, in order to ensure sufficient rigidity, the diameter of the tension bar must be sufficiently large.

Therefore, in the case of this structure, although the gap can be reduced, it is necessary to form a deep locking groove for accommodating the tension bar having a large diameter.
However, depending on the structure of the printing cylinder, it may be difficult to form the locking groove deeply, and the structure shown in FIG. 5 may not be applicable. In particular, the printing cylinder is composed of a cylinder body on the shaft side and a sleeve mounted on the outside of this cylinder body, and the printing length is changed so that the outer diameter of the printing cylinder can be changed by replacing the sleeve. In the case of a balable cut-off machine with a variable (cut-off length), depending on the sleeve, a slight thickness is generated, so that it is impossible to form the locking groove deeply.

  The present invention has been devised in view of such problems, and can be accommodated in a small space in the thickness direction of the printing cylinder while suppressing the size of the gap, and the printing plate-like member can be easily attached and detached. It is an object of the present invention to provide a fixing structure for a printing plate-like member, and a method for attaching and removing a printing plate-like member using the same.

  In order to achieve the above object, the printing plate-like member fixing structure of the present invention (Claim 1) is formed on the inner side of the outer peripheral surface of the printing cylinder (on the axial center side of the printing cylinder), and the first partial cylinder. A first space having a cylindrical inner peripheral surface, and a second partial cylindrical inner peripheral surface formed on the inner side (axial center side) of the outer peripheral surface of the printing cylinder adjacent to the first space. A locking groove having a second space, a first cylindrical outer peripheral surface rotatably mounted in the first space, and a part of the first cylindrical outer peripheral surface notched and elongated A first shaft-like member (tension bar) having a cut-out surface extending in the direction, and a second shaft that is rotatably mounted in the second space and is in sliding contact with the second partial cylindrical inner peripheral surface. A cylindrical outer peripheral surface and a part of the second cylindrical outer peripheral surface are cut out in a concave shape, and the front edge side bent portion of the plate member for printing mounted on the outer periphery of the printing cylinder is in front A second shaft-shaped member (holder) having a concave surface extending in a longitudinal direction sandwiched between the first partial cylindrical inner peripheral surface of the first shaft-shaped member, and the second shaft-shaped member (holder). The shaft-shaped member is urged so that the concave surface faces the direction of the first shaft-shaped member, and the tail edge side bend is formed between the notch surface and the concave surface of the first shaft-shaped member. When the first shaft-like member rotates and the edge portion of the notch surface or the first cylindrical outer peripheral surface presses the tail edge side bent portion in a state where the portion has entered, the tail edge side The second shaft-shaped member is driven and rotated in accordance with the deformation of the bent portion, and the tail edge-side bent portion is sandwiched between the concave surface and the first cylindrical outer peripheral surface. Yes.

  The locking groove is formed inward of the outer peripheral surface of the printing cylinder along the axial direction of the printing cylinder, and has an opening and an edge of the opening toward the axial center of the printing cylinder. And a first side cylindrical inner peripheral surface of the first space adjacent to the first locking surface. It is preferably formed on the inner side of the outer peripheral surface of the printing cylinder (on the axial center side of the printing cylinder), and the second partial cylindrical inner peripheral surface of the second space extends from the other edge of the opening. It is preferable that it is formed toward the axial center side of the printing cylinder.

It is preferable that the edge part of the said notch surface is formed in the smooth curved surface (Claim 2).
In addition, the concave surface includes a first flat portion located on the opening portion side of the locking groove and a second flat portion located on the side separated from the opening portion, and the tail edge side bent portion. Is preferably sandwiched and fixed between the second flat surface portion and the first cylindrical outer peripheral surface.
In this case, in the state where the tail edge side bent portion is sandwiched and fixed between the second flat surface portion and the first cylindrical outer peripheral surface, the edge of the first flat surface portion is the tail edge side. It is preferable that the shape and arrangement of the first shaft-shaped member and the second shaft-shaped member are set so as to be in pressure contact with the bent portion (claim 4).

  The method for attaching a printing plate-like member of the present invention (Claim 5) uses the printing plate-like member fixing structure according to any one of Claims 1 to 4 to provide the grip-side bent portion. The printing plate-like member joined and locked to the grip side locking surface of the locking groove and wound around the outer peripheral surface of the printing cylinder is attached and fixed to the outer peripheral surface of the printing cylinder. A method for attaching a printing plate-shaped member, wherein the first shaft-shaped member is formed so that the notch surface faces the concave surface of the second shaft-shaped member. A tail edge side insertion step of inserting the tail edge side bent portion of the plate-like member for printing into the gap between the notch surface and the concave surface, and the first shaft-like member is connected to the notch surface. Rotate forward so that the edge approaches and crimps the tail edge side bend, and the tail edge side cooperates with the concave surface A rotation step for bending and deforming the curved portion, and a state in which the first shaft-shaped member is further rotated forward, and the tail edge-side bent portion is held in pressure contact with the first cylindrical outer peripheral surface and the concave surface And a stop step for stopping at.

When using the fixing structure of the printing plate-like member according to claim 4, in the stop step, the tail edge side bent portion is in pressure contact with the first cylindrical outer peripheral surface and the second flat portion of the concave surface. It is preferable that the edge of the first flat surface portion is in pressure contact with the tail edge side bent portion (Claim 6).
The method for removing a printing plate-like member of the present invention (Claim 7) uses the fixing structure for a printing plate-like member according to any one of Claims 1 to 4, and the outer peripheral surface of the printing cylinder. The printing plate-like member attached and fixed to the printing cylinder is removed from the printing cylinder, wherein the tail edge side bent portion is formed on the first cylindrical outer peripheral surface and the concave surface. A clamping release step of reversely rotating the first shaft-shaped member from the clamped and clamped state, and releasing clamping of the tail-end bending portion by the first cylindrical outer peripheral surface and the concave surface; The first shaft-like member is further rotated in the reverse direction, and the tail edge-side bending is caused by the reverse rotation of the first cylindrical outer peripheral surface by friction between the first cylindrical outer periphery and the tail-end bending portion. And a discharge step for discharging the portion to the outside of the locking groove, To have.

  When using the fixing structure of the printing plate-like member according to claim 4, in the nipping release step, the tail edge side bent portion is in pressure contact with the first cylindrical outer peripheral surface and the second flat surface portion of the concave surface. The first shaft-shaped member is reversely rotated from the state where the edge of the first flat surface portion is in pressure contact with the tail edge-side bent portion, and the first cylindrical outer peripheral surface and the concave surface are It is preferable to release the grip of the tail edge side bent portion by the first flat surface portion (Claim 8).

  According to the fixing structure of the printing plate-like member of the present invention (Claim 1) and the mounting method of the printing plate-like member (Claim 5), the print-side plate-like member is fixed to the gripping side bent portion. The first shaft-like member is notched when the first shaft-like member is joined and locked to the gripping-side locking surface of the printing cylinder, wound around the outer peripheral surface of the printing cylinder, and then fixed to the outer peripheral surface of the printing cylinder. Facing the concave surface of the second shaft-shaped member, and inserting the tail edge-side bent portion of the printing plate-shaped member into the gap between the cut-out surface and the concave surface formed thereby (bare Butt side insertion step), the first shaft-like member is rotated forward so that the edge of the cut-out surface approaches and crimps the tail-side bent part, and the tail-side bent part cooperates with the concave surface. Is bent (rotation step), the first shaft-like member is further rotated forward, and the tail-end bending portion is pressed against the first cylindrical outer peripheral surface and the concave surface and sandwiched It can be stopped (stop step) in a state that.

Therefore, the tail edge side bent portion is sandwiched and fixed between the first cylindrical outer peripheral surface of the first shaft-shaped member and the concave surface of the second shaft-shaped member. It can be securely fixed to the printing cylinder.
In addition, according to the fixing structure of the printing plate-like member of the present invention (Claim 1) and the method of removing the printing plate-like member (Claim 7), the printing plate attached and fixed to the outer peripheral surface of the printing cylinder. When removing the member from the printing cylinder, the first shaft-like member is reversely rotated from the state in which the tail edge-side bent portion is pressed against and sandwiched between the first cylindrical outer peripheral surface and the concave surface, and the first cylinder Nipping the tail edge-side bent portion by the outer peripheral surface and the concave surface (holding release step), further rotating the first shaft-like member in the reverse direction, and the first cylindrical outer surface and the tail-end bending portion Due to this friction, the tail-end bent portion can be driven to be discharged to the outside of the locking groove as the first cylindrical outer peripheral surface rotates in the reverse direction (discharge step).

Therefore, only by rotating the first shaft-like member in the reverse direction, the notch surface of the first shaft-like member is opposed to the concave surface of the first shaft-like member so that the gap between the two is enlarged. The tail edge side bent portion can be easily discharged to the outside of the locking groove.
In such a structure, since it is not necessary to bend the tip of the tail edge side bent portion to form the claw portion, the tail edge side bend can be achieved even if the opening (gap) of the locking groove is reduced. The part can be inserted into and removed from the locking groove from the opening. Therefore, it is possible to reduce the non-printing length by reducing the gap and to promote the suppression of vibrations by reducing the paper loss rate and reducing the gap shock.

  Further, in the conventional fixing structure capable of reducing the gap, a slit (a tension bar) corresponding to the first shaft-shaped member is formed and fixed using this, whereas the first shaft-shaped member is fixed. Since it is a fixed structure that is sandwiched between two members, a member and a second shaft-shaped member, it is not necessary to form a slit in the first shaft-shaped member, and the diameter of the first shaft-shaped member is set to such an extent that slit processing is possible. There is no need to take large. Further, if the slit is formed, the rigidity is naturally reduced. However, in the case of the first shaft-like member not forming the slit, such a rigidity reduction can be avoided.

  Further, fixing of the tail-end bending portion by the first cylindrical outer peripheral surface of the first shaft-shaped member and the concave surface of the second shaft-shaped member is performed by fixing the first shaft-shaped member with the notch surface. Since it can be released simply by rotating it so as to face the concave surface of the second shaft-like member, the plate-like member for printing which is plastically deformed in the slit is rotated by rotating the tension bar as in the conventional fixing structure. Therefore, it is not necessary to forcibly eject it out of the locking groove, so that the rigidity required for the first shaft member (tension bar) can be reduced.

Thus, since it becomes easy to ensure the rigidity of the first shaft-shaped member itself and the rigidity requirement for the first shaft-shaped member can be reduced, the first shaft-shaped member has a smaller diameter. If the first shaft-like member and the second shaft-like member are arranged side by side in the circumferential direction, the fixing structure of the printing plate-like member is accommodated in a small space in the thickness direction of the printing cylinder. Will be able to.
According to the fixing structure for a printing plate-like member of the present invention (Claim 2), since the edge of the cut-out surface is formed with a smooth curved surface, the edge of the cut-out surface is used as the plate-like member for printing. When the plate member for printing is attached and fixed to the printing cylinder or removed from the printing cylinder, the first shaft-like member can be easily rotated and the operability is improved. This improves the load on the first shaft member when the printing plate member is attached or detached.

According to the printing plate-like member fixing structure of the present invention (Claim 3), the concave surface can be simply constituted by two planes of the first plane portion and the second plane portion, and further the second plane. The tail edge-side bent portion can be securely sandwiched and fixed between the portion and the first cylindrical outer peripheral surface.
According to the fixing structure of the printing plate-like member of the present invention (Claim 4) and the method of attaching the printing plate-like member (Claim 6), the tail edge side bent portion has the second flat portion and the first cylindrical shape. In the state of being sandwiched and fixed with the outer peripheral surface, the edge of the first flat surface portion is pressed against the tail edge side bent portion, so that the tail edge side bent portion is also rubbed from the edge of the first flat surface portion. Receives resistance and is firmly fixed.

  According to the fixing structure of the printing plate member of the present invention (Claim 4) and the method for removing the printing plate member (Claim 8), when the printing plate member is removed, the first shaft shape is removed. If the member is rotated in the reverse direction, the notch surface of the first shaft-shaped member faces the concave surface of the first shaft-shaped member so that the gap between the two is enlarged, and the edge of the first plane portion is The pressure contact with the tail edge side bent portion is also released, and the tail edge side bent portion can be easily discharged to the outside of the locking groove.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a fixing structure of a printing plate-like member according to an embodiment of the present invention, and a mounting method and a removing method of the printing plate-like member. FIG. 4 and FIG. A description will be given with reference to FIGS.
As shown in FIG. 4, for example, as shown in FIG. 4, the printing plate-like member fixing structure according to the present embodiment is also applied to a printing cylinder 1 such as a plate cylinder or a blanket cylinder. This is for fixing the plate-like member 2 for use.

The printing plate-like member (a printing plate is illustrated in FIG. 1) 2 is composed of a metal plate, a tail-side bent portion 2a is bent at one end, and the tail-end side at the other end. The bent portion 2b is bent in the body direction with the tail-side bent portion 2a. Further, the tail side bent portion 2a and the tail edge side bent portion 2b are formed in a flat plate shape having substantially the same length.
As shown in FIGS. 1A and 1B, the present fixing structure is provided with a locking groove 51 formed along the axial direction on the outer periphery of the printing cylinder 1, and rotatably mounted in the locking groove 51. The first shaft-shaped member (tension bar) 52 and the second shaft-shaped member (holder) 53 are provided.

The locking groove 51 is formed inward of the outer peripheral surface 1a of the printing cylinder 1 along the axial direction of the printing cylinder 1, and is formed in the opening (gap) 51a and inward of the opening 51a. The tail side locking surface 51b, the first space 51c adjacent to the tail side locking surface 51b, and the second space 51d formed adjacent to the first space 51c inside the opening 51a. And have.
The grip-side locking surface 51b is an outer peripheral surface from one edge of the opening 51a (the edge to which the grip-side bent portion 2a of the printing plate-like member 2 is mounted) toward the axial center of the printing cylinder 1. It extends at an acute angle with respect to 1a. The first space 51c is formed adjacent to the tail-side locking surface 51b and closer to the shaft center side of the printing cylinder 1 than the tail-side locking surface 51b, and the first partial cylindrical inner peripheral surface 51e. have. The second space 51d is formed on the axial center side of the printing cylinder 1 from the other edge of the opening 51a adjacent to the first space 51c, and has a second partial cylindrical inner peripheral surface 51f. ing.

  The tension bar 52 is rotatably mounted in the first space 51 c of the locking groove 51, and the gripping side bent portion 2 a of the printing plate-like member 2 mounted on the outer periphery of the printing cylinder 1 is held on the gripping side. It has the 1st cylindrical outer peripheral surface 52a pressed against the stop surface 51b, and the notch surface 52b which a part of this 1st cylindrical outer peripheral surface 52a was notched and extended in the longitudinal direction. Here, the cut-out surface 52b includes a first flat portion located on the opening 51a side and a rear side of the locking groove 51 (the axial center of the printing cylinder 1 so that the cross-section forms a U-shape. And a second flat portion located on the side).

  The holder 53 is rotatably mounted in the second space 51d of the locking groove 51, and has a second cylindrical outer peripheral surface 53a that is in sliding contact with the second partial cylindrical inner peripheral surface 51f, and the second cylindrical outer peripheral surface. A part of 53a is notched in a concave shape and has a concave surface 53b extending in the longitudinal direction. In this embodiment, the concave surface 53b has a first flat surface portion 53d positioned on the opening 51a side and a rear side of the locking groove 51 (on the axial center side of the printing cylinder 1) so that the cross section forms a square shape. And the second flat portion 53e located at the center. The tail edge side bent portion 2b of the printing plate-like member 2 can be sandwiched between the concave surface 53b and the first partial cylindrical inner peripheral surface 52a of the tension bar 52.

Further, the holder 53 is urged by a spring (not shown) mounted on the shaft end so that the concave surface 53b faces the tension bar 52, and the tension bar 52 is connected to the shaft end and is not shown. It can be rotated in both forward and reverse directions through the operating mechanism.
Then, when the notch surface 52b of the tension bar 52 and the concave surface 53b of the holder 53 face each other, a sufficient gap is formed between the notch surface 52b and the concave surface 53b, and the tail edge side bent portion 2b is formed. When entering the locking groove 51 from the opening 51a, the tail edge side bent portion 2b can easily enter this gap.

  In this way, when the tension bar 52 is rotated forward (rotation in the clockwise direction in FIG. 1) from the state where the notch surface 52b and the concave surface 53b face each other, the edge of the notch surface 52b of the tension bar 52 ( When the upper edge) 52c comes into contact with the tail edge side bent portion 2b and the tension bar 52 is further rotated forward, only the upper edge 52c is initially transferred, and thereafter, the upper edge 52c and the first The cylindrical outer peripheral surface 52a can press the tail edge side bent portion 2b.

  At this time, the upper edge portion 53c and the concave surface 53b of the concave surface 53b of the holder 53 are brought into contact with the back side of the tail edge-side bent portion 2b to exert a reaction force against the pressing by the tension bar 52. As a result, the tail edge-side bent portion 2b applies a force from the upper edge portion 52c of the notch surface 52b to the back of the locking groove 51 (in the axial direction of the printing cylinder 1) as the tension bar 52 rotates. While being received, the upper edge 52c or the first cylindrical outer peripheral surface 52a following the upper edge 52c and the concave surface 53b and the upper edge 53c of the holder 53 are sandwiched, and along the upper edge 53c of the holder 53, The tip is bent along the first cylindrical outer peripheral surface 52 a of the tension bar 52.

  In particular, with respect to the bending along the upper edge 53c of the concave surface 53b of the holder 53, the upper edge 52c of the notch surface 52b of the tension bar 52 and the first cylindrical outer peripheral surface that follows this are caused by the normal rotation of the tension bar 52. Since 52a pushes the second flat surface portion 53e of the concave surface 53b across the tail edge side bent portion 2b, the holder 53 is slightly rotated in the reverse rotation direction (counterclockwise). Thus, since the upper edge 53c of the concave surface 53b of the holder 53 presses the tail edge side bent portion 2b, the bending of the tail edge side bent portion 2b is promoted.

As a result, the tail edge side bent portion 2b is bent along the upper edge portion 53c and curved along the first cylindrical outer peripheral surface 52a, and the second flat portion 53e and the first cylindrical shape are formed. It is clamped and fixed between the outer peripheral surface 52a.
Further, in the state where the tail edge-side bent portion 2b is fixed in this manner, the first cylindrical outer peripheral surface 52a pushes the second flat portion 53e of the concave surface 53b with the tail edge-side bent portion 2b sandwiched therebetween, and the holder 53 is biased in the reverse rotation direction (counterclockwise), so that the upper edge portion 53c of the concave surface 53b of the holder 53 is always crimped to the tail edge-side bent portion 2b. The tail edge-side bent portion 2 b is in a state where a sufficient tension is applied by a force toward the back of the locking groove 51 (in the axial direction of the printing cylinder 1) as the tension bar 52 rotates. It is firmly fixed by the frictional force caused by clamping between the flat part 53e and the first cylindrical outer peripheral surface 52a and the frictional force caused by pressure bonding of the upper edge part 53c of the holder 53.

The upper edge portion 52c of the notch surface 52b of the tension bar 52 is formed with a smooth curved surface so that it can slide smoothly with respect to the tail edge side bent portion 2b.
Further, in this embodiment, as shown in FIG. 2, the printing cylinder 1 is composed of a cylinder body 1A on the shaft side and a sleeve 1B mounted on the outside of the cylinder body 1A, and the sleeve 1B is replaced. It is considered that the present structure is applied to a balable cut-off machine in which the printing length (cut-off length) is variable so that the outer diameter of the printing cylinder 1 can be changed.

Since the printing plate-like member fixing structure according to an embodiment of the present invention is configured as described above, the printing plate-like member 2 is fixed to the printing cylinder 1 or fixed to the printing cylinder 1. When the printing plate-like member 2 is removed, it can be processed by the following method.
First, when attaching, the bending side bending part 2A is inserted into the locking groove 51 from the opening 51a, and joined and locked to the locking side locking surface 51B. Further, the printing plate-like member 2 is wound around the outer peripheral surface 1 a of the printing cylinder 1.

Then, as shown in FIG. 3A, the tension bar 52 is directed so that the notch surface 52 b faces the concave surface 53 b of the holder 53, and the gap between the notch surface 52 b and the concave surface 53 b formed thereby. Then, the tail edge side bent portion 2b of the printing plate-like member 2 is inserted (the tail edge side insertion step).
Next, as shown in FIGS. 3B and 3C, the tension bar 52 is rotated forward so that the upper edge portion 52c of the notch surface 52 approaches the crimped side bent portion 2b and is crimped. The tail edge side bent portion 2b is bent and deformed in cooperation with the concave surface 53b of the holder 53 (rotation step).

Further, the tension bar 52 is rotated in the forward direction, and as shown in FIG. 3 (d), the tail edge-side bent portion 2b is stopped in a state where it is held in pressure contact with the first cylindrical outer peripheral surface 52e and the concave surface 53b. (Stop step).
As a result, the tail edge side bent portion 2b is bent along the upper edge portion 53c and curved along the first cylindrical outer peripheral surface 52a, and the second flat portion 53e and the first cylindrical shape are formed. It is clamped and fixed between the outer peripheral surface 52a.

  In this state, the first cylindrical outer peripheral surface 52a presses the second flat surface portion 53e of the concave surface 53b across the tail edge-side bent portion 2b to urge the holder 53 in the reverse rotation direction (counterclockwise). The upper edge portion 53c of the concave surface 53b of the holder 53 is always pressed against the tail edge-side bent portion 2b, and the tail edge-side bent portion 2b is located at the back of the locking groove 51 with the rotation of the tension bar 52 ( In a state where sufficient tension is applied by the force in the axial direction of the printing cylinder 1), frictional force caused by clamping between the second flat surface portion 53 e and the first cylindrical outer peripheral surface 52 a, It is firmly fixed by the frictional force generated by the crimping of the edge 53c.

Since the upper edge portion 52c of the notch surface 52b of the tension bar 52 is formed with a smooth curved surface, the upper edge portion 52c smoothly slides against the tail edge side bent portion 2b when the tension bar 52 rotates. The tension bar 52 can be easily rotated.
On the other hand, when removing, the tail edge side bent portion 2b is sandwiched between the first cylindrical outer peripheral surface 52e of the tension bar 52 and the concave surface 53b of the holder 53 as shown in FIG. 3 (d). From the state, as shown in FIG. 3C, the tension bar 52 is rotated in the reverse direction to release the grip of the tail edge-side bent portion 2b by the first cylindrical outer peripheral surface 52e and the concave surface 53b (holding releasing step). .

Further, as shown sequentially in FIGS. 3C, 3B, and 3A, the tension bar 52 is further rotated in the reverse direction, and the first cylindrical outer peripheral surface 52e and the tail edge side bent portion 2b are frictionally engaged with each other. With the reverse rotation of the cylindrical outer peripheral surface 52e, the tail edge side bent portion 2b is driven to be discharged to the outside of the locking groove 51 (discharge step).
Therefore, only by rotating the tension bar 52 in the reverse direction, the notch surface 52b of the tension bar 52 faces the concave surface 53b of the holder 53 so that the gap between the two is enlarged, and the upper edge of the first flat portion 53d The pressure contact of the tail edge side bent portion 2b of 53c is also released, and the tail edge side bent portion 2b can be easily discharged to the outside of the locking groove 51.

  Moreover, in this structure, since it is not necessary to bend the tip of the tail edge side bent portion 2b to form a claw portion, the tail edge can be reduced even if the opening (gap) 51a of the locking groove 51 is made small. The side bent portion 2b can be easily inserted into and removed from the opening 51a. Therefore, it is possible to reduce the non-printing length by reducing the gap and to promote the suppression of vibrations by reducing the paper loss rate and reducing the gap shock.

  Further, in the conventional fixing structure capable of reducing the gap, a slit is formed in the tension bar and fixed using the slit, but in this structure, the tension bar 52 and the holder 53 are used as two members. Since the fixing structure sandwiches the butt-side bent portion 2b, it is not necessary to form a slit in the tension bar 52, and it is not necessary to increase the diameter of the tension bar 52 to such an extent that slit processing is possible. If the slit is formed, the rigidity is naturally reduced. However, in the case of the tension bar 52, since the slit is not formed, such a rigidity reduction can be avoided.

  Further, the tail edge-side bent portion 2b is fixed by the first cylindrical outer peripheral surface 52a of the tension bar 52 and the concave surface 53b of the holder 53. The tension bar 52 is fixed to the concave surface 53b of the holder 53. Since it can be released simply by rotating it in the opposite state, the plate member for plastic deformation in the slit is forced out of the locking groove by rotating the tension bar as in the conventional fixing structure. There is no need to discharge. Therefore, the rigidity required for the tension bar 52 can be reduced.

  As described above, the rigidity of the tension bar 52 itself can be easily secured and the rigidity requirement for the tension bar 52 can be reduced, so that the tension bar 52 can be made smaller in diameter. If the tension bar 52 and the holder 53 are arranged side by side in the circumferential direction as in the embodiment, the present invention can be applied to a sleeve having a small thickness in the balable cutoff machine.

As mentioned above, although embodiment of this invention was described, embodiment of this invention is not limited to the above-mentioned thing.
For example, in the above-described embodiment, the notch surface 52b of the tension bar 52 is formed in a U-shaped cross section from two planes. However, the notch surface 52b may be configured by a single plane. The shape is not limited.

  Moreover, in the said embodiment, although the concave surface 53b of the holder 53 is formed in the cross-sectional shape from two planes, the 1st plane part 53d and the 2nd plane part 53e, about this concave surface 53b, it is tension | tensile_strength. The first cylindrical outer peripheral surface 52a of the bar 52 only needs to be able to enter, and is not limited to this shape.

BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional view which shows typically the fixation structure of the printing plate-shaped member concerning one Embodiment of this invention, Comprising: (a) shows the state before fixing a tail edge side bending part, (b) Indicates a state in which the bent butt side bend is fixed. It is a cross-sectional view which shows typically the printing cylinder concerning one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional view shown to the attachment method and removal method of the printing plate-shaped member concerning one Embodiment of this invention, Comprising: (a)-(d) shows the attachment method in order, (d)-(a) The removal method is shown in order. It is a perspective view which shows typically the attachment state of the plate-shaped member for printing to a printing cylinder. It is a cross-sectional view which shows typically the fixation structure (plate fixation structure) of the conventional printing plate-shaped member. It is a cross-sectional view schematically showing another conventional plate-like member fixing structure for printing (a blanket fixing structure).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing cylinder 1a The outer peripheral surface of the printing cylinder 1 2 The plate-shaped member for printing 2a The tail side bending part 2b The tail edge side bending part 51 Locking groove 51a Opening part (gap)
51b Custom-side locking surface 51c First space 51d Second space 51e First partial cylindrical inner peripheral surface 51f Second partial cylindrical inner peripheral surface 52 First shaft-shaped member (tension bar)
52a 1st cylindrical outer peripheral surface 52b Notch surface 52c Upper edge part of the notch surface 52b 53 2nd shaft-shaped member (holder)
53a 2nd cylindrical outer peripheral surface 53b Concave surface 53c Upper edge part of the concave surface 53b 53d 1st plane part 53e 2nd plane part

Claims (8)

A first space formed inward of the outer peripheral surface of the printing cylinder and having a first partial cylindrical inner peripheral surface, and formed inward of the outer peripheral surface of the printing cylinder adjacent to the first space. A second space having a second partial cylindrical inner peripheral surface, and a locking groove,
A first cylindrical outer peripheral surface rotatably provided in the first space, and a first notched surface extending in the longitudinal direction by cutting a part of the first cylindrical outer peripheral surface. An axial member of
A second cylindrical outer peripheral surface that is rotatably mounted in the second space and is in sliding contact with the second partial cylindrical inner peripheral surface, and a part of the second cylindrical outer peripheral surface is cut out in a concave shape, and The tail edge side bent portion of the printing plate member mounted on the outer periphery of the printing cylinder extends in the longitudinal direction so as to be sandwiched between the first partial cylindrical inner peripheral surface of the first shaft member. A second shaft-shaped member having a concave surface;
The second shaft-shaped member is urged so that the concave surface faces the direction of the first shaft-shaped member, and the flange is interposed between the notch surface and the concave surface of the first shaft-shaped member. When the first shaft-shaped member rotates and the edge portion of the notch surface or the first cylindrical outer peripheral surface presses the tail edge-side bent portion in a state where the tail-end bent portion has entered, The second shaft-shaped member is driven to rotate in accordance with the deformation of the tail edge side bent portion, and the tail edge side bent portion is sandwiched between the concave surface and the first cylindrical outer peripheral surface. A fixing structure for a printing plate-like member. 2. The plate-like member fixing structure for printing according to claim 1, wherein an edge portion of the notch surface is formed with a smooth curved surface. The concave surface is composed of a first flat portion located on the opening side of the locking groove and a second flat portion located on the side separated from the opening,
3. The plate-like member for printing according to claim 1, wherein the tail edge side bent portion is sandwiched and fixed between the second flat surface portion and the first cylindrical outer peripheral surface. Fixed structure. In the state where the tail edge side bent portion is sandwiched and fixed between the second flat surface portion and the first cylindrical outer peripheral surface, an edge of the first flat surface portion is formed on the tail edge side bent portion. 4. The plate-like member fixing structure for printing according to claim 3, wherein the shape and arrangement of the first shaft-like member and the second shaft-like member are set so as to come into pressure contact. Using the fixing structure for a printing plate-like member according to any one of claims 1 to 4, the grip-side bent portion is joined and locked to the grip-side locking surface of the locking groove. The printing plate member wound around the outer peripheral surface of the printing cylinder is attached and fixed to the outer peripheral surface of the printing cylinder.
The first shaft-shaped member is directed so that the cut-out surface faces the concave surface of the second shaft-shaped member, and the gap formed between the cut-out surface and the concave surface is formed in the gap. A tail edge side insertion step of inserting the tail edge side bent portion of the plate-like member for printing;
The first shaft-shaped member is rotated forward so that the edge of the cut-out surface approaches and crimps the tail edge side bent portion, and the tail edge side bent portion is cooperated with the concave surface. A rotation step for bending deformation;
A stopping step of further rotating the first shaft-like member in a forward direction and stopping the tail end side bent portion in a state of being held in pressure contact with the first cylindrical outer peripheral surface and the concave surface; A method for attaching a printing plate-like member. While using the printing plate-like member fixing structure according to claim 4,
In the stopping step, the tail edge-side bent portion is clamped between the first cylindrical outer peripheral surface and the concave second flat surface portion, and an edge of the first flat surface portion is pinched. The method for attaching a printing plate-like member according to claim 5, wherein the plate-like member is in pressure contact with the butt-side bent portion. Using the printing plate-like member fixing structure according to any one of claims 1 to 4, the printing plate-like member attached and fixed to the outer peripheral surface of the printing cylinder is removed from the printing cylinder. A method for removing a plate member for printing,
The first shaft-shaped member is rotated in a reverse direction from the state where the tail edge-side bent portion is sandwiched between the first cylindrical outer peripheral surface and the concave surface, and the first cylindrical outer peripheral surface and the concave surface are rotated. A pinching release step of releasing pinching of the tail edge side bent portion by
The first shaft-like member is further rotated in the reverse direction, and the tail edge side is reversely rotated by the friction between the first cylindrical outer peripheral surface and the tail edge side bend. A method for removing a printing plate-like member, comprising: a discharging step of discharging the bent portion to the outside of the locking groove. While using the printing plate-like member fixing structure according to claim 4,
In the clamping release step, the tail edge-side bent portion is clamped and pressed between the first cylindrical outer peripheral surface and the concave second planar portion, and an edge of the first planar portion is the collar. The first shaft-shaped member is reversely rotated from a state in pressure contact with the tail-end bending portion, and the tail-end bending portion is sandwiched between the first cylindrical outer peripheral surface and the concave first flat portion. The method for removing a printing plate-like member according to claim 7, wherein the printing plate-like member is released.

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