JPS5953171B2 - rotary daikata - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a die cylinder which is rotationally driven in a predetermined direction and has a knife and a ruled line ruler attached to its outer peripheral surface, and which is arranged parallel to the die cylinder and rotated in the opposite direction to the die cylinder.
This rotary die cutter is comprised of an anvil cylinder having an anvil on its outer circumferential surface that receives the knife and the crease ruler, and is used to cut and crease the sheet fed between the die cylinder and the anvil cylinder. This relates to a structure that compensates for changes in the anvil over time.

FIG. 1 and FIG. 2 show the schematic structure of a conventional rotary die cutter. In FIG. 2, the sheet 9 sent from the previous process advances in the direction of the arrow shown in the figure, passes over the sheet guide 8, and is further transferred to the anvil cylinder 1 by the feed rolls 6 and 7.
and the die cylinder 2. An anvil 3 made of urethane rubber is wrapped around the outer peripheral surface of the anvil cylinder 1. A die 71 having a sheet cutting knife 5 and a creasing ruler 70 embedded therein is attached to the outer peripheral surface of the die cylinder. The anvil cylinder 1 and the die cylinder 2 rotate in opposite directions (directions of arrows), and the distance between their axes is adjusted so that the cutting edge of the knife 5 is sunk below the surface of the anvil 3 to an appropriate depth. Further, the height of the ruled line ruler 70 in the radial direction is slightly lower than that of the knife 5, so that there is a slight gap between the tip of the ruler 70 and the anvil 3. The ruled line ruler 70 makes depressions (hereinafter referred to as ruled lines) on the sheet 9 that serve as a reference when the sheet 9 is folded. Therefore, the sheet 9 fed between the two cylinders is cut as required by the knife 5 and ruled lines are added by the ruled line ruler 70. At this time, the sheet 9 can be completely cut by the cutting edge of the knife 5 biting under the surface of the anvil 3, but as a result, the surface of the anvil 3 inevitably has a part where the cutting edge of the knife 5 bites. This will cause damage to the If the work is continued for a certain period of time in such a state, the scratches will partially progress and the anvil surface will become uneven, resulting in parts of the sheet 9 being unable to be cut. In contrast, the distance between the axes is adjusted to increase the amount of insertion of the knife 5 into the anvil 3 to cut the sheet 9. As this process is repeated, the outer diameter of the anvil 3 is reduced by being scraped off by the knife 5, and the irregularities on the anvil surface become larger. This results in incomplete cutting of the sheet 9. Furthermore, since the gap between the ruled line ruler and the anvil surface varies depending on the position, the depth of the ruled line also becomes uneven, and in extreme cases, a part of the ruled line may be torn. For this reason, when folding and assembling it into a box, it may not be folded accurately. Furthermore, the outer diameter of the anvil 3 decreases and its outer circumferential speed decreases, and the anvil surface becomes uneven and contacts. , By reducing the contact resistance, the feeding speed of the sheet 9 can be controlled. -゜゛Slimming 6q! t&a little, which tends to shorten the cut dimension.

In this way, the anvil 3 is worn out, and the surface of the anvil 3 is worn out. When the unevenness becomes extremely large, the anvil 3 is replaced with a new one. The purpose of the present invention is to solve the above-mentioned problems of the conventional method by installing a blade capable of cutting the anvil surface and cutting the anvil surface after a certain period of work. The purpose of the present invention is to provide a rotary die cutter that can restore the surface condition of the anvil to its original state and perform complete cutting and uniform scoring.

Another purpose is to equip a stepped gear type transmission device, and reduce the outer diameter of the anvil by cutting the anvil cylinder.
The present invention aims to provide a rotary die cutter that improves cutting accuracy by correcting changes in the peripheral speed of the burr every predetermined amount. The present invention is driven to rotate in a predetermined direction, is arranged parallel to a die cylinder having a knife and a ruled line ruler attached to its outer peripheral surface, and is rotated in the opposite direction to the die cylinder,
An apparatus for cutting and creasing a sheet fed between the die cylinder and the anvil cylinder, comprising an anvil cylinder having an anvil on its outer circumferential surface for receiving the knife and the creasing ruler, and adjusting the interval between the anvil cylinder and the die cylinder. an adjustment mechanism, a tool rest disposed adjacent to the anvil cylinder so as to be slidable in the coaxial direction, and an adjustment mechanism attached to the tool rest so as to be movable toward and away from the anvil toward the axis of the anvil cylinder; This is a rotary die cutter characterized by having a blade mechanism capable of cutting.

The present invention is configured as described above, and when the sheet is cut and creased for a certain period of time or longer and the anvil surface becomes uneven, the sheet feeding operation is stopped.

Then, the blade is brought into contact with the anvil by a predetermined amount, and the turret is slid in the axial direction to cut the anvil surface.
This process is repeated to eliminate irregularities on the anvil surface or to reduce the anvil to a size that does not affect sheet processing. Next, the adjustment mechanism closes the distance between the anvil cylinder and the die cylinder to a value commensurate with the cutting amount of the anvil, and the cutting and creasing of the sheet is restarted.

As described above, according to the present invention, by cutting the anvil surface on the machine, the surface condition of the anvil can be maintained at the optimum condition, so that the sheet can be cut completely and the ruled lines can always be processed uniformly.

Furthermore, since the anvil can be cut on the machine, work downtime can be shortened and sheet processing productivity can be improved. In addition to the configuration of the above invention, a second invention is a stepped gear type which is interposed in the drive mechanism of the die cylinder and anvil cylinder and changes the angular velocity of the anvil cylinder with respect to the die cylinder in multiple steps at minute speeds. This is a rotary die cutter characterized by having a speed change mechanism.

The present invention corrects the change in circumferential speed due to a decrease in the outer diameter of the anvil cylinder due to cutting of the anvil surface by changing the angular velocity of the anvil cylinder using a stepped gear type transmission mechanism. The sheet is cut and the lines are processed while keeping the ratio constant.

As described above, according to the present invention, the circumferential speed ratio of the die cylinder and anvil cylinder is kept constant before and after cutting the anvil surface, so it is possible to prevent variations in cutting dimensions and improve cutting accuracy. ' can be done.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 3-9.

FIG. 3 shows the entire rotary die cutter of this embodiment. Reference numeral 10 denotes a variable speed drive motor which is a driving source for the entire paper processing machine, and its output is inputted via a gear train 11 to a gear 12 of a rotary die cutter.

A gear 12 is a gear 1 attached to the right end of the die cylinder 2.
3 are interlocked. The gear] 2 is attached to a shaft rotatably supported by the frames 14, 114 across the rotary die cutter, and the gear 1 is attached to the other end of the coaxial shaft 14.
5 is attached, and its left end further extends toward a gear type transmission 16 fixed to the frame. The gear 15 meshes with a gear 74 rotatably attached five times to a shaft 21 rotatably supported by the frames 4, 4. gear 7
The sun gear 73 of the differential reduction gear 20 is keyed to the boss 4. The gear 18 attached to the output shaft 17 of the gear type transmission 16 is connected to the differential transmission 20 via an intermediate gear 77.
It meshes with the gear 19 attached to the case 72. Another sun gear 75 of the differential transmission 20 is connected to the shaft 2.
The key is locked to 1. The sun gears 73 and 75 mesh with gears 81 and 82, respectively, which are attached to a shaft 80 rotatably supported by the case 72. Figures 4 and 5
The figure shows the anvil cutting mechanism disposed above the anvil cylinder. The guide rail 30 has a 1T-shaped cross section as shown in FIG. 4, and both ends thereof are fixed to the frames 4, 4. A motor 38 is fixed to the flat plate portion of the guide rail 30. A feed pin 31 is fitted into the T-shaped portion of the guide rail 30. A chuck holder 32 is fixed to the outer surface of the feed spinner 31 with bolts 43. The chuck holder 32 may be fixed by any suitable means other than the bolts 43. The tip of the chuck holder 32 has a cavity that opens in the direction of the anvil cylinder 1, and a chuck 33 is fitted into the cavity so as to be slidable in the direction of the anvil cylinder.
A threaded rod 35 screwed into 2 is fixed. The chuck 33 can be secured to the chuck holder 32 at a predetermined position with a bolt 76. An adjusting nut 36 and a locking nut 37 are attached to the threaded rod 35, and by rotating the adjusting nut 36, the chuck 33 can be moved up and down.
A cutter 34 is fixed to the tip of the chuck 33. Further, there is a protrusion on the opposite side of the feed link 31 to the chuck holder 32, and the protrusion has an internal thread.

The same female thread is screwed into a threaded rod 42 rotatably supported by the frames 4, 4. A sprocket get wheel 41 is fixed to one end of the threaded rod 42, and is connected to a sprocket wheel 39 of the motor 38 by a chain 40.
These parts constitute a feeding mechanism that feeds the feeding piece 31 in the axial direction of the anvil cylinder 1. Figures 6 to 9
The figure shows the detailed structure of the stepped gear type transmission 16. The gear box 50 is fixed to the frame 4, and an extension of the shaft 14 is rotatably supported. A clutch gear 51 is attached to the shaft 14 so as to be slidable in the axial direction. The swing link 61 is attached to the clutch gear 51 so as to be able to swing freely around the attachment portion, and an intermediate gear 62 that meshes with the clutch gear 51 is rotatably attached to one end of the swing link 61 .
A shaft 17 is rotatably attached to a gear box 50 above the shaft 4. The shaft 17 has gears 54 and 55 with different numbers of teeth.
, 56, 57, and 58 are fixed to each other by spacers 60 at regular intervals. These gears 54, 55,
516, 57, and 58 each independently mesh with the intermediate gear 62. A handle 63 is screwed onto the other end of the swing link 62. The bottom of the gear box 50 is connected to the shaft 1 as shown in FIG.
It has an arc shape centered at 4, and has a hole 79 as shown in FIG. The handle 63 projects to the outside through the hole 79, along which the clutch gear 51 can be slid along the shaft via the swing link 62. Moreover, the handle 63 can be fixed to the gear box 50 with a set screw 64. The anvil cylinder 1 is rotatably supported by the frames 4, 4 via an eccentric bearing 85, and the distance between the anvil cylinder 1 and the die cylinder 2 is adjusted by rotating the eccentric bearing 85 by appropriate means. can do.

Note that the adjustment of the interval between the anvil cylinder 1 and the die cylinder 2 is not limited to the eccentric bearing; the anvil cylinder or the die cylinder may also be supported on the frame 4 so as to be movable up and down, or other means may be employed. Good too.

The present embodiment is constructed as described above, and its operation will be explained next.

When the anvil cylinder 1 and the die cylinder 2 are used to punch out the sheet 9 for a certain period of time, the surface of the anvil 3 becomes uneven due to the action of the knife 5. Loosen the bolt 76 and locking nut 37, and tighten the adjustment nut 36 to tighten the blade 34.
Adjust the amount of cut into the anvil 3, tighten the locking nut, fix the chuck 33 with the bolt 76, and fix the cutter 34. Then, the motor 38 is rotated while the anvil cylinder 1 is rotated in the direction of the arrow as in the work, and the rotation is transmitted to the threaded rod 42 via the sprocket wheel 39, chain 40, and sprocket wheel 41. The feeder 31 is moved along the guide rail 30. As the feed head 31 moves, the blade 34 moves and cuts the surface of the anvil 3. This process is repeated as appropriate to cut the surface of the anvil 3 to such an extent that the knife scratches on the surface do not affect the punching operation of the sheet 9. In addition, by cutting the surface of this anvil 3,
Although the distance between the outer peripheral surface of the anvil 3 and the die cylinder 1 becomes wider, the eccentric bearing 85 is adjusted to maintain the same distance as before cutting. Furthermore, the circumferential speed of the anvil decreases to the extent that the outer diameter of the anvil 3 decreases even if the same rotational speed as before cutting is applied to the anvil cylinder 1.

Since the related circumferential speeds of the anvil 3 and knife 5 change, the moving speed of the sheet 9 changes slightly from before cutting. This results in an error in the punching and cutting dimensions of the sheet 9. In that case, the anvil cylinder 1 is moved by the gear type transmission 16.
change the circumferential speed of The operation of this gear type transmission 16 will be explained. In this example, the initial anvil outer diameter is 4
0901! n, the clutch gear 51 has 101 teeth, and the gears 54, 55, 56, 57, and 58 each have 12 teeth.
1 sheet, 124 sheets, 127 sheets, 130 sheets, and 133 sheets. When the clutch gear 51 and gear 54 are engaged and the anvil outer diameter is 409 mm, the clutch gear 51
When the gears 55, 56, 57, and 58 are engaged, the peripheral speed relationship between the anvil 3 and the knife 5 does not change.The outer diameter dimensions of the anvil are 407 mm, 405.5 mm, and 40 mm, respectively.
4mm, 402.5mm. This relationship is shown in FIG. Further, this relationship is determined by the characteristics of the differential speed reducer 20. Therefore, when the outer diameter of the anvil reaches 407 mm due to the cutting, the engagement between the clutch gear 51 and the gear 54 may be stopped, and the clutch gear 51 may be engaged with the gear 55. This operation can be performed by moving the handle 63, which is currently at the F1 position in FIG. 9, to the F2 position. That is, the set screw 64 is loosened to allow the handle 63 and the swing link 61 to move. When the handle is in the G1 position, the swing link 62 moves to the axis 1.
4, the gear 54 and the intermediate gear 62 are disengaged, and the clutch gear 51 becomes able to slide on the shaft 14.
Next, when the handle 63 is moved from the G1 position to the G2 position, the clutch gear 51. The swing link 61 and the intermediate gear 62 are connected to the shaft 1
4 in the axial direction, and further move the handle 63 from the G2 position to the F position.
When moved to the second position, the intermediate gear 62 and the gear 55 mesh with each other. In this state, tighten the set screw 64 to remove the handle 63 and the swing link 61. Clutch gear 51. The intermediate gear 62 is fixed.
Changes to other gears 56, 57, and 58 are also made in the same manner as the above procedure. In this way, according to this embodiment, the unevenness that occurs on the anvil surface due to work can be cut without removing the anvil from the machine, and the original drive source of the machine can be used as is to keep the surface condition of the anvil constant. ,
It can prevent line defects such as partial inability to cut, line cracks, and insufficient line pressure, and it also eliminates the need for a series of operations such as removing the anvil for cutting, transporting, cutting, reassembling, and adjusting, making sheet punching work easier. Downtime is greatly reduced and productivity is improved.

Furthermore, after cutting, the peripheral speed ratio of the die cylinder and anvil cylinder can be kept constant by simple manual operation using the attached stepped gear type transmission device, and this also suppresses the occurrence of variations in cutting dimensions. can.

[Brief explanation of the drawing]

1 and 2 show the schematic structure of a conventional rotary die cutter, FIG. 1 is a front view partially sectional, FIG. 2 is a vertical sectional view, and FIGS. 3 to 12 are in accordance with the present invention. FIG. 3 is a partially sectional front view showing the overall configuration, FIG. 4 is a side view showing the cutting mechanism of the anvil, and FIG. 5 is the same as that shown in FIG. A plan view showing a part, FIG. 6 is a front sectional view showing the speed change mechanism of the anvil cylinder, FIG. 7 is a BB sectional view in FIG. 6, FIG. 8 is a DD sectional view in FIG. 7, Fig. 9 is a view C of Fig. 8, Fig. 10 is a table showing the relationship between the anvil outer diameter and the transmission gear, Fig. 11 is a cross-sectional view showing the relationship between the ruled line ruler and the anvil, and Fig. 12 is the FIG. 12 is an axial cross-sectional view of FIG. 11; 1... Anvil cylinder, 2... Die cylinder, 3
...Anvil, 4...Frame, 5...Knife,
9... Seat, 16... Gear type transmission, 30...
・Guide rail, 31...Feeding piece, 32...Chuck holder, 33...Chuck, 34...Cuttle, 85
...Eccentric bearing.

Claims (1)

[Scope of Claims] 1. A die cylinder which is rotationally driven in a predetermined direction and has a knife and a ruled line ruler attached to its outer circumferential surface, and a die cylinder which is arranged parallel to the die cylinder and which is rotated in the opposite direction to the die cylinder and has the knife and a ruled line ruler attached to its outer circumferential surface. and an anvil cylinder having an anvil for receiving a ruled line ruler, and an adjustment mechanism for adjusting the interval between the anvil cylinder and the die cylinder, in an apparatus for cutting and creasing a sheet fed between the die cylinder and the anvil cylinder, the anvil cylinder having an anvil that receives a ruled line ruler; a tool rest disposed adjacent to the cylinder so as to be freely slidable in the coaxial direction; and a tool mounted on the tool rest toward the axis of the anvil cylinder so as to be able to move toward and away from the anvil, and capable of cutting the anvil; A rotary die cutter characterized by having. 2. A die cylinder that is driven to rotate in a predetermined direction and has a knife and a ruled line ruler attached to its outer circumferential surface, and an anvil that is arranged parallel to the die cylinder and rotates in the opposite direction to the die cylinder and receives the knife and ruled line ruler on its outer circumferential surface. an anvil cylinder having an anvil cylinder, an adjustment mechanism for adjusting the distance between the anvil cylinder and the die cylinder, an adjustment mechanism adjacent to the anvil cylinder and coaxial with the anvil cylinder; a tool rest that is arranged to be slidable in the direction; a tool that is attached to the tool rest so as to be able to move toward and away from the anvil toward the axis of the anvil cylinder and capable of cutting the anvil; and the die cylinder and the anvil cylinder. A rotary die cutter characterized by having a stepped gear type transmission mechanism interposed in the drive mechanism of the die cylinder for changing the angular velocity of the anvil cylinder with respect to the die cylinder in multiple steps at minute speeds.