JP2001113612A - Slotter in corrugated fiberboard box manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To favorably remove slot waste generated when slotting working is performed on a corrugated board sheet from the inside of a slotter without using a slot waste-removing member, etc., which have been conventionally used in a slotter of a corrugated fiberboard sheet box manufacturing machine. SOLUTION: A slotter for a corrugated fiberboard sheet box manufacturing machine wherein a press ring for a corrugated fiberboard sheet of an upper slotter, a lower slotter knife of a lower slotter and a central projection in the width direction of a collar have the same diameter and a recessed part is provided at the central part in the width direction of the upper slotter knife and a slot waste is pinched by the projection of the collar to deform the slot waste in the width direction and the slot waste is surely removed by the projection provided on the back end part in the circumferential direction of the upper slotter knife, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slotter for a corrugated cardboard tooth making machine for performing a grooving process for forming a corrugated cardboard sheet into a box shape.

[0002]

2. Description of the Related Art As shown in FIG. 8, a cardboard box making machine 1 converts a corrugated cardboard sheet S loaded on a sheet supply table 3 of a sheet supply unit 2 into a downstream feed roll 4 by a sheet supply member such as a kicker (not shown). 5 and sent to the printing unit 6. Generally, at least two printing units 6 are provided, and each of the printing units 6a and 6b performs desired printing. The printing units 6a, 6b are provided with press cylinders 8a, 8b arranged at positions opposite to the printing cylinders 7a, 7ab around which a desired printing plate (not shown) is wound, with the paper line PL interposed therebetween. The desired printing is performed on the cardboard sheet S by passing the cardboard sheet S between the printing cylinders 7a and 7b and the press cylinders 8a and 8b. The printing units 6a and 6b are provided with anilox rolls 9a and 9b for applying ink to a printing plate (not shown) wound around the printing cylinders 7a and 7b, and rubber rolls 10a and 10b. Subsequently, the printed cardboard sheet S is sent to the cleaner unit 11, and the cleaner rolls 12 and 13 of the cleaner unit 11 are moved.
Thus, a ruled line for bending the cardboard sheet S is provided at a desired position. Then, it is sent to the slotter unit 14 and the slotters 15, 16, 1 in the slotter unit 14 are sent.
In steps 7 and 18, the corrugated cardboard sheet is subjected to grooving. The corrugated cardboard sheet S is then bent by a folder gluer (not shown) connected to the downstream side of the cardboard box making machine 1 or is piled up by a stacker or the like (not shown), and a folder gluer (not shown) which is separately installed. To be boxed.

[0003] The removal of the slotter debris in the slotter has conventionally been performed by a method and apparatus as shown in FIGS. 7 (a) and 7 (b). When the corrugated cardboard sheet S fed to the upper and lower slotters 15, 16 is grooved by the upper slotter knife 19 of the upper slotter 15 and the lower slotter knife 39a, 39b of the lower slotter 16, slotter chips Sa are generated. The slotter waste Sa enters the space between the lower slotter knives 39a and 39b of the lower slotter 16, and the slotter waste remover 20 provided in the lower slotter 16 and the slotter waste remover 22 supported by the support pins 21a and 21b.
Therefore, it is removed. Slotter waste removal member 2 of FIG.
Reference numeral 0 denotes a contact-type slotter scrap removal house material that directly contacts the inside of the lower slotter 16, and FIG.
It is a non-contact type slotter chip removing member that does not allow the slotter chip removing member to contact the inside.

[0004]

FIG. 6 is a block diagram showing a conventional slotter dust removing apparatus for a slotter.
As shown in (a), the upper and lower slotters 15, 16
Sheet S fed to the upper slotter knife 19
Groove cutting is performed by the lower slotter knives 39a and 39b, and slotter chips Sa are generated. At this time, the slotter chips Sa are cut by the upper slotter knife 19 so as to be pressed from above.
6 is caught between the lower slotter knives 39a and 39b. Further, since the holding rings 23a and 23b provided on the upper slotter 15 hold the corrugated cardboard sheet S toward the lower slotter 16 and perform the upper slotter knife 19 groove cutting, the outer diameter of the holding ring 23 is lower than that of the lower slotter 16. It is larger than the outer diameter of the slotter knives 39a and 39b. That is, the upper slotter knife 19 and the holding rings 23a and 23b provided in the upper slotter 15 rotate faster than the lower slotter knives 39a and 39b of the lower slotter 16. These rotational peripheral speed differences become the contact resistance when the corrugated cardboard sheet S comes into contact with the respective portions of the upper slotter 15 and the lower slotter 16 when the corrugated cardboard sheet S is grooved by the slotter. In other words, the lower slotter 16 has a function of being drawn toward the lower slotter 16 having a lower rotational peripheral speed, and overlaps with the action of the above-mentioned slotter chips Sa being pressed from above by the upper slotter knife 19 of the upper slotter 15, and the lower slotter 16 has a lower slotter. It is caught between the knives 39a and 39b.

Thus, the lower slotter knives 39a, 39
9b, the slot waste Sa is removed by the slot removing members 20 and 22, etc.
The slot dust of the strong corrugated cardboard sheet S or the slot dust of the double-sided corrugated cardboard sheet is removed by the slot dust removing member 2.
There is a case where it cannot be removed even by 0,22. For example,
The slot waste Sa may enter the contact portion between the lower slotter 16 and the slot waste removing member 20 and become clogged. Also,
Slot debris removing member 22 and supporting pin 21b supporting it
And between the slot waste removing member 22 and the lower slotter knives 39a and 39b. As described above, once the slotter waste Sa is clogged between the lower slotter knives 39a and 39b, the slotter waste removing members 20, 22 and the like, the subsequent slot waste is clogged so as to be stacked one after another, and the clogged slot waste Sa is clogged. Caused friction with the slotter knives 39a and 39b inside the lower slotter 16, gradually generating heat and causing an accident.

[0006]

An object of the present invention is to provide an apparatus for smoothly removing slotter chips generated when a grooving process is performed on a corrugated cardboard sheet S from the slotter to prevent the slotter chips from being clogged inside the slotter. The purpose is to provide.

[0007]

Means to Solve the Problems To overcome the above problems,
In order to suitably achieve the intended purpose, the present invention provides an arc-shaped grooving knife having a desired peripheral length on one side of a corrugated cardboard sheet conveyance line, and inserts the arc-shaped grooving knife on the other side. In the slotter in the corrugated box making machine in which the annular groove-cutting knives are arranged so as to face each other and rotate while rotating in opposite directions to each other, the one arc-shaped groove-cutting knife is used. Corrugated cardboard provided with an arcuate concave portion at the center in the width direction of the above, and an intermediate member having an annular convex portion which enters into the concave portion of the arcuate grooved knife is disposed between the annular grooved knife. It is a slotter in a box making machine.

[0008] Further, the present invention is a slotter in a corrugated cardboard box making machine, wherein the outer diameter of the convex portion of the intermediate member is the same as the outer diameter of the annular grooved knife.

Further, a holding ring is provided on both sides of the groove cutting knife on the arc to cooperate with the annular groove cutting knife to sandwich the cardboard sheet and to convey the sheet to the downstream side. Is a slotter in a corrugated cardboard sheet making machine having the same diameter as the annular grooved knife.

[0010] A projection protruding from the outer diameter of the grooved knife on the arc is provided at a circumferentially downstream end of the grooved knife on the arc, and is provided between the annular grooved knife. This is a slotter in a cardboard box making machine in which an intermediate member is provided with a recess at a position facing the projection.

Further, there is provided a slotter in a corrugated cardboard sheet box making machine having a structure in which the above-mentioned mechanisms are mechanically combined.

[0012]

According to the slotter in the cardboard box making machine of the present invention, the slot waste cut by the upper slotter knife of the upper slotter and the slotter knife of the lower slotter is removed by the intermediate member provided between the lower slotter knives. Since the dust is reliably separated from the product by being pinched by the convex portion and the concave portion of the upper slotter knife, and the slot dust is pressed and bent in the width direction, the slotter dust is not pinched between the lower slotter knife. In addition, since the outer diameter of the holding member of the upper slotter knife and the intermediate member between the lower slotter knife and the lower slotter knife are the same, there is no difference in peripheral speed between them, so that the force pulled by either one of them is applied to the slotter chips. Does not work, and only a force conveyed substantially in the conveying direction of the corrugated cardboard sheet is applied. Furthermore, since a protrusion projecting beyond the outer diameter of the upper slotter knife is provided at the rear end in the circumferential direction of the upper slotter knife, the slotter chips are kicked downstream by the protrusion.
Therefore, the slotter chips grooved by the slotter in the cardboard box making machine of the present invention can be smoothly discharged from between the lower slotter knives without being caught between the lower slotter knives.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. FIG. 1 is a side view suitably showing a slotter in a cardboard box making machine of the present invention, and an upper slotter 40 having an upper slotter knife 30 on an upper side across a paper line PL.
And a lower slotter 41 having a lower slotter knife 32. The upper slotter 40 is provided with a plurality of holders 28 which slide the shaft 26 in the axial direction so as to be rotatable. The upper slotter knife 30 and the holding ring 3 are provided on the peripheral surface of the holder 28.
6 is provided. The upper slotter knife 30 includes at least one upper slotter knife provided in one holder and two upper slotter knives provided in one holder. Here, one upper slotter knife is provided in one holder for easy understanding of the description. The configuration will be described with reference to the slotter. As shown in FIG. 2, the upper slotter knife 30 holds the holding ring 36 against the holder 28.
a and 36b so as to be sandwiched therebetween.
4 (a) and 4 (b).
As shown in detail, the center 30b is concave with respect to the blade portions 30a on both sides in the width direction of the upper slotter knife 30. Also, a protrusion 31 is provided at the rear end of the circumference in the rotation direction so as to protrude from the outer circumferential circle of the upper slotter knife 30.
Is provided.

The lower slotter 41 has a plurality of rotatable holders 29 which slide the shaft 26 in the axial direction similarly to the upper slotter 40, and a holding ring 36 provided on the upper slotter 40 on the peripheral surface of the holder 29. Lower slotter knife 3 having a corrugated cardboard sheet holding portion that performs the same action as
2a and 32b. Lower slotter knife 32a, 32
b is provided on the entire circumference in the circumferential direction, and as shown in FIG. 2, there is an interval between the lower slotter knives 32a and 32b so that the upper slotter knife 30 enters between the lower slotter knives 32a and 32b with respect to the holder 29. The annular groove cutting knife 3
An intermediate member 33 having an annular projection 38 at the center in the width direction, which is smaller than the outer diameters of the bolts 2a and 32b, is provided.
At 5, it is fixed to the holder 29. FIG. 5A shows an annular convex portion provided at the center of the intermediate member 33 in the width direction.
As shown in FIG. 5B, the protrusion 3 of the upper slotter knife 30
A recess 37 into which 1 enters is provided.

Although the present invention is constructed as described above, another important component is the space between the holding ring 36 of the upper slotter 40 and the lower slotter knife 32 and the lower slotter knife 32a, 32b of the lower slotter 41. Is that the circumferential outer shape of the convex portion 38 of the intermediate member 33 sandwiched between them has the same outer diameter.

Next, the use of the preferred embodiment according to the present invention in the above configuration will be described. First, as shown in FIG. 8, the cardboard sheets S are stacked on the sheet supply table 3 of the sheet supply unit 2 of the cardboard box making machine 1 and directed toward the downstream feed rolls 4, 5 by a sheet supply member such as a kicker (not shown). And send it to the printing unit 6. Printing unit 6
The desired printing is performed in a and 6b, and sent to the cleaner unit 11, where the cleaner rolls 12 and
13 provides a ruled line for bending the corrugated cardboard sheet S at a desired position. Then, the cardboard sheet S is sent to the slotter unit 14 and subjected to a desired grooving process. In this slotter unit 14, as shown in FIG.
6b and the lower slotter knife 32a,
The cardboard sheet holding portion 32b conveys the sheet while holding it slightly crushed from both sides with an equal holding force. Subsequently, the upper slotter knife 30 cuts into the corrugated cardboard sheet S and engages with the lower slotter knives 32a and 32b to perform a groove cutting process on the corrugated cardboard sheet S.

At this time, the widthwise central portion 30b of the upper slotter knife 30 is recessed with respect to the blade portions 30a on both sides, and the widthwise central portion of the intermediate member 33 provided between the lower slotter knives 32a and 32b. 38 project, the upper slotter knife 30 and the lower slotter knife 32a,
The slot waste Ss grooved at 32b is sandwiched between the concave portion 30b of the upper slotter knife 30 and the convex portion 38 of the intermediate member 33, and the slotter waste Ss is pushed and bent in the width direction as shown in FIG. Can be In this way, as shown in FIG. 6A, both ends in the width direction of the slot waste Ss do not get caught between both inner side surfaces of the lower slotter knives 32a and 32b. Accordingly, the slot waste Ss is smoothly discharged outward from between the lower slotter knives 32a and 32b by centrifugal force.

The pressing ring 3 of the upper slotter 40
6 and lower slotter knife 32a, 32 of lower slotter 41
b and the lower part of the slotter knife 32a, 32b, the circumferential outer shape of the convex portion 38 of the intermediate member 33 is configured to have the same outer diameter. Does not occur. Therefore, the corrugated cardboard sheet S is conveyed toward the downstream side with equal force on both the upper surface and the lower surface. Then, the upper slotter knife 30 and the lower slotter knife 32a,
The slotter waste Ss that has been grooved in 32b is removed by the upper slotter knife 30 into the lower slotter knives 32a and 32b.
The force acting on the lower slotter 41 side is smaller than that of the conventional slotter only by the force pushed to the side, and it is easy to discharge from the lower slotter by centrifugal force.

Further, since the upper slotter knife 30 is provided with the projection 31, the upper slotter knife 30
And the lower end of the slot waste Ss which has been grooved by the lower slotter knives 32a and 32b and has entered between the lower slotter knives 32a and 32b.
1 and the slot 37 of the lower slotter 41, and the projection 31 forms a slot waste S as shown in FIG.
The action of kicking out the rear end of s works. By the above operation, slot waste is reliably discharged.

[0020]

As described above, the slotter of the cardboard box making machine according to the present invention is located between the upper slotter knife of the upper slotter, the lower slotter knife of the lower slotter, and the lower slotter knife at the center in the width direction. By the action of the convex portion of the annularly provided intermediate member, the slotted scrap Ss that has been grooved is reliably discharged without remaining between the lower slotter knives 32a and 32b. Accordingly, it is not necessary to physically provide a slot dust removing member between the lower slotter knives, and since there is no slot dust removing member, there is no clogging between the lower slotter knives by the slotter dust removing member. The debris Ss does not cause friction with the slotter knife 39 inside the lower slotter 16 to gradually generate heat and cause an accident of ignition.

Further, since the slot dust removing member which is necessary in the conventional slotter is not required, the number of parts can be reduced, the production cost can be reduced, and the structure is simplified, so that the maintenance effect is facilitated. Is also obtained.

[Brief description of the drawings]

FIG. 1 is a side view suitably showing a slotter of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a detailed view of a portion B in FIG. 1 and its operation diagram.

FIG. 4 is a detailed view of an upper slotter knife.

FIG. 5 is a detailed view of a lower slotter knife.

FIG. 6 is a diagram showing a relationship between a slotter and a slotter waste.

FIG. 7 is a view showing a conventional slotter waste removing apparatus using a slotter.

FIG. 8 is a side view showing a general cardboard box making machine.

[Explanation of symbols]

1 Cardboard Box Making Machine 14 Slotter Unit 26 Shaft 27 Shaft 28 Holder 29 Holder 30 Upper Slotter Knife 31 Projection 32 Lower Slotter Knife 33 Intermediate Member 36 Pressing Ring 37 Depression 38 Convex 40 Upper Slotter 41 Lower Slotter S Cardboard Sheet Ss Slot waste

Claims (5)

[Claims] 1. An arc-shaped grooving knife (30) having a desired peripheral length is provided on one side of a corrugated cardboard sheet conveying line (PL), and the arc-shaped grooving knife (3) is provided on the other side.
0) is sandwiched by an annular groove cutting knife (32a,
32b), a slotter of a corrugated box making machine for grooving a fed corrugated cardboard sheet (S) while rotating in the opposite direction to each other, wherein said one arc-shaped upper grooving knife (30) An intermediate member (3) having an annular concave portion (30b) at the center in the width direction of the intermediate member (3) having an annular convex portion (38) that enters the concave portion (30b) of the arc-shaped grooved knife (30).
A slotter in a cardboard box making machine, wherein 3) is disposed between the annular groove-cutting knives (32a, 32b). 2. An annular groove cutting knife (32a, 32b) having an outer diameter of a convex portion (38) of said intermediate member (33).
3. A slotter in a cardboard box making machine according to claim 2, wherein said slotter has the same outer diameter as said. 3. A holding ring that cooperates with the annular grooved knives (32a, 32b) on both sides of the grooved knives (30) on the arc to sandwich the corrugated cardboard sheet (S) and convey the sheet to the downstream side. (36a, 36b)
The slotter according to claim 1, wherein the outer diameter of the holding ring (36a, 36b) is the same as that of the annular grooved knife (32a, 32b). 4. A ridge (31) projecting from the outer diameter of the grooving knife (30) on the arc is provided at a circumferentially downstream end of the grooving knife (30) on the arc. In the intermediate member (33) provided between the grooving knives (32a, 32b), a concave portion (3) is provided at a position opposed to the protrusion (31).
The slotter according to claim 1, further comprising: (7). 5. A slotter in a corrugated cardboard sheet making machine according to claim 1.