JP3556792B2 - Cutting tool mounting structure for rotary die cutter - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique relating to a rotary die cutter suitable for processing (for example, scoring or punching) of a corrugated cardboard sheet and the like, and in particular, attaches a blade mount and a cutting plate to a knife cylinder and an anvil cylinder, respectively. For the structure.
[0002]
[Prior art]
2. Description of the Related Art A rotary die cutter is used when a printed corrugated cardboard sheet is scored or punched in a predetermined shape in the production of a corrugated cardboard box. As a conventional rotary die cutter, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 8-229885. Hereinafter, the technology disclosed in the publication will be described with reference to FIGS. 4 and 5.
[0003]
4 (A) and 4 (B) show a conventional rotary die cutter. FIG. 4 (A) is a partially cutaway front view, and FIG. 4 (B) is a schematic view thereof. FIG.
As shown in FIG. 4A, in the conventional rotary die cutter, a pair of left and right frames 14a and 14b are erected in parallel and connected to each other via an upper stay 12 and a lower stay 13 extending in the left-right direction. .
[0004]
An anvil cylinder 2 and a knife cylinder 3 having the same diameter are interposed in the upper and lower portions between the frames 14a and 14b, respectively, with the cylinder axis direction being parallel to the left and right directions and at appropriate intervals vertically. I have. Both ends of the rotating shafts 2a and 3a of these cylinders 2 and 3 are supported by frames 14a and 14b, respectively, and the cylinders 2 and 3 are rotatably supported between the frames 14a and 14b.
[0005]
Gears 15 and 16 having the same diameter and the same number of teeth are fitted to the ends of the rotating shafts 2a and 3a of the cylinders 2 and 3 projecting outward from the frame 14b. The gears 15 and 16 mesh with each other, and the rotational driving force is transmitted to one of the gears 15 or 16 from a drive mechanism (not shown), so that the anvil cylinder 2 and the knife cylinder 3 are synchronized with each other. It is designed to be driven to rotate in the opposite direction.
[0006]
Further, as shown in FIG. 4B, a pair of upper and lower feed rolls 17a and 17b for feeding the corrugated cardboard sheet 1 between the cylinders 2 and 3 are disposed upstream of the cylinders 2 and 3. Have been.
As shown in FIGS. 4A and 4B, a cutting knife 5 of a predetermined shape or a ruled line rule (FIG. 8 and FIG. 9) is attached.
[0007]
With the above-described configuration, in the rotary die cutter, the corrugated cardboard sheet 1 sequentially sent from the printing step, which is the preceding step, is sent between the anvil cylinder 2 and the knife cylinder 3 by the feed rolls 17a and 17b. Then, predetermined processing such as punching or scoring is performed on the corrugated cardboard sheet 1 by pinching rotation of the cutting knife 5 (or the ruled line rule 9) fixed to the knife cylinder 3 via the blade mount 4 and the anvil cylinder 2. Is applied.
[0008]
By the way, the structure in which the blade mount 4 is mounted on the outer peripheral surface of the knife cylinder 3 is configured as shown in FIGS. 5 (A) to 5 (C). Here, FIG. 5 (A) is a perspective view showing a knife cylinder having the structure, FIG. 5 (B) is an enlarged sectional view taken along the line BB of FIG. 5 (A), and FIG. FIG. 4A is an enlarged cross-sectional view taken along the line CC in FIG.
As shown in FIG. 5A, a plurality of screw holes 6 are formed on the outer peripheral surface of the knife cylinder 3 at a predetermined pitch in the circumferential direction and the cylinder axial direction. By screwing a bolt 11 into each screw hole 6, an abutment 7 and fixing rings 8 a and 8 b, which will be described later, are fixed to the knife cylinder 3 as shown in FIGS. It has become so.
[0009]
The abutment 7 extends along the cylinder axis direction, and is fixed to the knife cylinder 3 by bolts 11 as shown in FIG. 5B. Is formed over the entire length in the left-right direction.
A pair of left and right fixing rings 8a and 8b slidable in the cylinder axis direction are inserted into both sides of the knife cylinder 3 in the axial direction. The knife 11 is fixed at a predetermined position on the outer peripheral surface of the knife cylinder 3 by screwing and tightening the bolt 11 into the bolt hole 6. As shown in FIG. 5 (C), these fixing rings 8a and 8b are formed with concave portions 8c over which the left and right edges of the blade mount 4 fit. ing.
[0010]
Although only the fixing ring 8b is shown in FIG. 5C, the fixing ring 8a is also configured in the same manner and has a similar recess 8c.
The recess 7b of the abutment 7 and the recess 8c of the fixing rings 8a and 8b are provided with these edges so that the front edge and the left and right edges of the blade mounting base 4 to which the cutting knife 5 is fixed are fitted in close contact. It is formed to have the same shape as. In FIG. 5B and FIG. 5C, reference numeral 10 denotes a reinforcing bracket inserted to prevent abrasion and breakage of each of the recesses 7b and 8c.
[0011]
In the structure as described above, when fixing the blade mounting base 4, first, as shown in FIG. 5A, the front edge of the blade mounting base 4 is connected to the abutment 7 fixed to the knife cylinder 3. After inserting and fitting into the concave portion 7b and positioning the blade mounting base 4 in the circumferential direction, the rear end side of the blade mounting base 4 is sequentially fixed to the knife cylinder 3 with the countersunk bolt 9.
[0012]
Then, the fixing rings 8a and 8b on the left and right end sides are respectively moved to the center side, the left and right edges of the blade mounting base 4 are fitted into the recesses 8c, and the blade mounting base 4 is pressed via the reinforcing metal fitting 10, In this state, the fixing rings 8a and 8b are fixed to the knife cylinder 3 with a plurality of bolts 11.
In this manner, the replacement of the blade mount 4 can be performed easily and in a short time.
[0013]
On the other hand, the structure on the side of the anvil cylinder 2 is disclosed, for example, in Japanese Utility Model Publication No. 8-5038. Hereinafter, the technology disclosed in the publication will be described with reference to FIGS. 6 to 9. Here, FIG. 6 is a perspective view showing a conventional anvil cylinder, FIG. 7 is a sectional view of a main part showing a mounting structure of a cutting plate to a conventional anvil cylinder, and FIG. 9 is a sectional view showing an attachment for positioning the female shape.
[0014]
Prior to the description of the structure on the anvil cylinder 2 side, the die cutting method will be described. As the method, there are a soft cutting method using a saw blade knife and an elastic anvil, and a hard cutting method using a straight blade knife and a hard anvil. The technique disclosed in Japanese Utility Model Publication No. 8-5038 relates to a hard cut method, and the present invention is also based on the hard cut method.
[0015]
The characteristics of the technique disclosed in the Japanese Utility Model Publication No. 8-5038 will be described with reference to FIG. 6. The outer peripheral surface of the anvil cylinder 2 is provided with a hard, thin, flexible material for receiving the cutting knife 5 and cutting the cardboard sheet 1. The cutting plate 20 is attached. At the front edge of the cutting plate 20, a stopper 21 is provided over the entire width, and at the rear edge, a plurality of stoppers 23 are provided via rubber bands 22. These stoppers 21, 23 are provided. Is locked to the stopper 24 fixed to the anvil cylinder 2, so that the cutting plate 20 is fixed to the anvil cylinder 2.
[0016]
As shown in FIG. 7, the stopper 24 is fixed to the anvil cylinder 2 by screwing a bolt 11 into a bolt hole 6 formed in the anvil cylinder 2 and tightening. A locking groove 24b for locking the stopper 21 at the front edge of the cutting plate 20 is formed on the front side of the stopper 24, and the rear side of the cutting plate 20 is formed on the rear side of the stopper 24. A locking groove 24c for locking the stopper 23 is formed.
[0017]
On the other hand, as shown in FIG. 6 and FIG. 8, on the cutting plate 20, a female ruler 25 for performing the crease processing in cooperation with the ruler rule 9 on the knife cylinder 3 side is usually provided with a ruler rule 9 which is usually a male. It is stuck so as to sandwich it.
As described above, since the male and female creases are usually used in pairs, when the shape of the box to be produced changes, the blade attachment 4 and the cutting plate 20 are replaced in pairs.
[0018]
The relative positional accuracy of the male and female creases is extremely important.If the relative positional relationship shifts, the paper on the narrow side will be torn or the cardboard will not be able to be folded symmetrically when folded, degrading the quality of the box. Or
Therefore, the normal ruled line is accurately stuck on the cutting plate 20 while ensuring the relative positional accuracy of the male and female rules as follows.
[0019]
On the knife cylinder 3 side, after the blade mounting base 4 is fitted to the abutment 7 to perform positioning in the rotational direction, as shown in FIG. 5 (A), an axial mounting reference line 7a provided on the abutment 7 is provided. By aligning the reference position with the reference line 4a provided on the blade mount 4, axial positioning is performed, and the blade mount 4 is mounted at a correct position on the knife cylinder 3.
[0020]
On the cutting plate 20 side, the stopper 21 is locked in the locking groove 24b of the stopper 24 to perform positioning in the rotation direction, and as shown in FIG. The cutting plate 20 is attached to a correct position on the anvil cylinder 2 by aligning the cutting plate 20 with the reference line 21 a provided on the clasp 21.
[0021]
Next, as shown in FIG. 9, a rubber or plastic attachment 26 is attached to the original female rule 25. The attachment 26 is provided with a groove 27 that fits into the ruled line rule 9 on the blade mount 4 side. Then, the female rule 25 is attached to the rule rule 9 via the attachment 26 by fitting the rule rule 9 on the tool mount 4 into the groove 27 of the attachment 26. Thereafter, when the cylinders 2 and 3 are rotated, the female crease 25 is transferred to the cutting plate 20 by the adhesive applied to the back of the female crease 25, so that the male and female can be accurately fitted to the cutting plate 20. Pasted.
[0022]
[Problems to be solved by the invention]
By the way, as described above, the blade mount 4 and the cutting plate 20 on which the female ruler 25 is stuck are positioned by the abutment 7 and the stopper 24, respectively. The relative position of each of the machines (rotary die cutters) is shifted with respect to the gears 15 and 16 due to the processing accuracy and the mounting accuracy of the preceding components.
[0023]
When only one machine is used, even if the relative position between the abutment 7 and the stopper 24 is shifted, if the female crease 25 is transferred by the means described above with reference to FIG. The exact position of the male and female creases can be reproduced even if the cutting plate 20 is attached or detached.
However, when a plurality of identical machines are installed in one factory, and when it is desired to share the blade mount 4 and the cutting plate 20 among these machines, each machine is deviated from the reference in the upper and lower cylinders 2 and 3. In such a case, even if the male and female positions are correctly aligned on one machine, a shift occurs on the other machine.
[0024]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the use of a blade mount and a cutting plate even when there is a deviation in a standard for each machine, thereby reducing equipment costs and improving production flexibility. It is an object of the present invention to provide a cutting tool mounting structure for a rotary die cutter.
[0025]
[Means for Solving the Problems]
In order to achieve the above object, a cutting tool mounting structure for a rotary die cutter according to the present invention (Claim 1) is configured such that an abutment for restricting a rotational position of a blade mounting tool as a cutting tool is fixed on a knife cylinder. In the rotary die cutter formed as described above, a groove is formed in the knife cylinder, and a position adjusting member is fitted in the groove so as to be movable in the rotation direction and the axial direction of the knife cylinder. Is fixed to the knife cylinder.
[0026]
Further, the rotary die cutter cutting tool mounting structure of the present invention (Claim 2) is a rotary die cutter in which a cutting plate as a cutting tool is wrapped around an anvil cylinder and fixed by being locked to a stopper. A groove is formed, and a position adjusting member is fitted in the groove so as to be movable in the rotation direction and the axial direction of the anvil cylinder, and the stopper is fixed to the anvil cylinder via the position adjusting member. .
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a rotary die cutter cutting tool mounting structure according to an embodiment of the present invention. FIG. 1 shows a knife cylinder (or anvil cylinder) to which the structure is applied, partially cut away. FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. In this embodiment, a case will be described in which the present invention is applied to a rotary die cutter similar to that described above with reference to FIGS. 4A and 4B. Therefore, in the following, description of the same parts as those of the related art will be omitted, and only the parts related to the characteristic configuration of the present invention will be described.
[0028]
The structure of the present embodiment shown in FIGS. 1 to 3 is for mounting a blade mount 4 (see FIGS. 4, 5 and 8) as a cutting tool on a knife cylinder 30 of a rotary die cutter. .
The knife cylinder 30 is formed with one groove 31 having a U-shaped cross section along the cylinder axis direction.
[0029]
As shown in FIGS. 2 and 3, a slide base (position adjustment member) 32 having a rectangular cross section slightly smaller than the groove 31 in the rotation direction and the axial direction moves in the groove 31 in the rotation direction and the axial direction. It is fitted as possible. The height of the slide base 32 is substantially equal to the depth of the groove 31, and the upper surface of the slide base 32 is substantially flush with the outer peripheral surface of the knife cylinder 30 when the slide base 32 is fitted in the groove 31. It is formed as follows.
[0030]
A plurality of bolt through holes 32a are formed in the slide base 32 at appropriate intervals in the longitudinal direction, and the bottom of the groove 31 in the knife cylinder 30 has the same shape as the bolt through hole 32a in the cylinder axis direction. A plurality of (the same number as the bolt through holes 32a) bolt holes 30a are formed at intervals.
Then, as shown in FIG. 2, the slide base 32 is fixed to the knife cylinder 30 in the groove 31 by tightening a bolt 33 that penetrates the bolt through hole 32a and is screwed into the bolt hole 30a. At this time, the diameter of the bolt through hole 32a is formed to be slightly larger than the diameter of the bolt 33, so that a sufficient allowance for adjusting the movement of the slide base 32 in the rotation direction and the axial direction of the knife cylinder 30 can be taken. I have.
[0031]
As shown in FIGS. 1 and 3, the abutment 7 that regulates the position of the blade mount 4 in the rotation direction is fixed to the knife cylinder 30 via the slide base 32 configured as described above. In other words, a plurality of bolt through holes 7c are formed in the abutment 7 at appropriate intervals in the longitudinal direction, and a plurality of bolt through holes 7c are formed on the upper surface of the slide base 32 at the same interval as the bolt through holes 7c. Bolt holes 32b are formed (the same number as the bolt through holes 7c). As shown in FIG. 3, the abutment 7 tightens a bolt 34 that passes through the bolt through hole 7c and is screwed into the bolt hole 32b. It is fixed to the slide base 32.
[0032]
5A and 5B, a recess 7b into which the front edge of the blade mount 4 fits is also provided on the abutment 7 of the present embodiment over the entire length in the left-right direction. It is formed. Further, on the upper surface of the abutment 7, an axial mounting reference line 7a used for positioning the blade mounting base 4 in the axial direction as described above is provided.
In the cutting tool mounting structure of the present embodiment configured as described above, when mounting the abutment 7 to the knife cylinder 2, the slide base 32 movable in the cylinder axis direction and the rotation direction is interposed, and the slide is provided for each machine. The position of the abutment 7 can be adjusted by moving the base 32 in the cylinder axis direction or the rotation direction and adjusting the position thereof.
[0033]
As described above, a plurality of identical machines (rotary die cutters) are installed in one factory, and when it is desired to share the blade mount 4 or the cutting plate 20 among these machines, any one of the machines is used. , The relative position between the abutment 7 and the stopper 24 in the other machine must be adjusted to the machine.
At this time, in this embodiment, the abutment 7 is removed from the slide base 32, then the bolt 33 is loosened, and the slide base 32 is moved to the knife cylinder 30 by using the adjustment allowance of the bolt through hole 32 a of the slide base 32. The relative position between the abutment 7 and the stopper 24 is adjusted by moving a predetermined amount in the rotation direction or the axial direction of.
[0034]
As described above, according to the cutting tool mounting structure of the present embodiment, the relative position between the abutment 7 and the stopper 24 can be adjusted. Therefore, in a factory having a plurality of the same machines, Even if there is a deviation in the reference, the blade mounting table 4 and the cutting plate 20 can be shared between machines, so that equipment costs can be greatly reduced and production flexibility can be greatly improved.
[0035]
In the above-described embodiment, the present invention is applied to the knife cylinder 30. However, the structure of the present invention is such that the cutting plate 20 as a cutting tool is placed on the anvil cylinder 40 of the rotary die cutter (see FIGS. 7) is applied in the same manner as described above.
1 to 3, a groove 31 similar to that described above is formed in the anvil cylinder 40, and a slide base 32 similar to that described above is formed in the groove 31 in the rotation direction of the anvil cylinder 40. The stopper 24 (see FIGS. 6 and 7) is fixed to the anvil cylinder via the slide base 32. Therefore, also in this case, the same operation and effect as the above-described embodiment can be obtained.
[0036]
【The invention's effect】
As described above in detail, according to the rotary die cutter cutting tool mounting structure of the present invention (claims 1 and 2), the rotary die cutter has a slide base that can move in the cylinder axis direction and the rotation direction, and the slide base is provided through the slide base. With a very simple structure of fixing the abutment or the stop to the knife cylinder or the anvil cylinder, the relative position between the abutment and the stop can be adjusted. Even if there is a deviation from the standard, the blade mount and cutting plate can be shared between machines, which can greatly reduce equipment costs and greatly improve production flexibility.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing a knife cylinder (or anvil cylinder) to which a rotary die cutter cutting tool mounting structure according to an embodiment of the present invention is applied.
FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a sectional view taken along the line III-III in FIG. 1;
4A and 4B show a conventional rotary die cutter, wherein FIG. 4A is a front view showing a part of the rotary die cutter, and FIG. 4B is a schematic side view thereof.
FIGS. 5A and 5B show a conventional mounting structure of a blade mounting base to a knife cylinder, wherein FIG. 5A is a perspective view showing a knife cylinder having the structure, and FIG. 5B is an enlarged view of FIG. FIG. 4C is a cross-sectional view of FIG.
FIG. 6 is a perspective view showing a conventional anvil cylinder.
FIG. 7 is a sectional view of a main part showing a conventional mounting structure of a cutting plate to an anvil cylinder.
FIG. 8 is a cross-sectional view of a main part for describing male and female crease processing.
FIG. 9 is a sectional view showing an attachment for positioning a female shape.
[Explanation of symbols]
4 Blade mount (cutting tool)
7 Money 20 Cutting plate (cutting tool)
24 Stopper 30 Knife cylinder 31 Groove 32 Slide base (position adjustment member)
32a bolt through hole 33 bolt 40 anvil cylinder

Claims (2)

In a rotary die cutter comprising a knife fixed on a knife cylinder for regulating a rotational position of a blade mount as a cutting tool, a groove is formed in the knife cylinder, and a position adjusting member is formed in the groove. Characterized in that the metal is fixed to the knife cylinder via the position adjusting member so as to be movable in the rotation direction and the axial direction of the knife cylinder. In a rotary die cutter for fixing a cutting plate as a cutting tool by winding it onto a fixing tool by fixing it on an anvil cylinder, a groove is formed in the anvil cylinder, and a position adjusting member for the anvil cylinder is provided in the groove. A cutting tool mounting structure for a rotary die cutter, wherein the fitting is movably fitted in the rotation direction and the axial direction, and the stopper is fixed to the anvil cylinder via the position adjusting member.

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