JP2003025277A - Cutter for cutting work of corrugated fiberboard plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter for cutting work cutting a corrugated fiberboard plate worked removing a beard-shaped protruded part on a wavy plate generated in an end face of the corrugated fiberboard plate at its cutting work time by the cutter of male/female type for cutting work, so as to prevent cutting of a hand even when it is rubbed by an end face of a liner. SOLUTION: A cutter 23 of male mold for cutting work is used by combination with a cutter of female mold for cutting work in cutting work of a corrugated fiberboard plate, and a groove 30 of section in V shape or the like is provided with a suitable space apart in a lengthwise direction of a blade part 28 bent in circular arc shape by a gentle curve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated board cutting tool for cutting corrugated board to produce corrugated board products such as packaging boxes.

[0002]

2. Description of the Related Art Conventionally, a corrugated board, which is a material for a corrugated board box, is constructed by sandwiching a corrugated board 1 between liners 2 as shown in FIG. 7, and using such a corrugated board as shown in FIG. It is generally known that the packaging box is cut into the shape as shown and the packaging box in the unfolded state is assembled as shown in FIG. The packaging box 3 includes two sets of opposite side plates 4, 4, 5, 5 and two sets of opposite side plates 4, 4, 5, 5.
Bottom plate forming flaps 6,6,7,7 connected to the lower end of the
Similarly, upper lid forming flaps 8, 8, 9, 9 continuously provided on the upper ends of the two pairs of opposing side plates 4, 4, 5, 5 and any one of the side plates 4 positioned at the end in the expanded state. 4, 5,
5 (a side plate 4 among the side plates 4 and 4 in the drawing) is provided with a stop substitute flap 10 that is continuously provided. That is, the packaging box 3 includes the bottom plate forming flaps 6, 6,
Since it is necessary to provide 7, 7 and the flaps 8, 8, 9, 9 for forming the upper lid, between the adjacent flaps 6, 6,
6,7, 7,7 and adjacent flaps 8,8
, 9 and 9, and 9 and 9 are separated by a cutting blade, and also in the forming portion of the stop substitute flap 10, the bottom plate forming flap 6 and the upper lid forming flap 6 at the lower end and the upper end of the one side plate 4 are formed. The extra corrugated board on the side of the flap 8 is also cut by the cutting blade.

When the packaging box 3 is manufactured using a corrugated board made in accordance with the size of the packaging box in the unfolded state, the flaps 6 and 6 which are adjacent to each other, the spacing between the flaps 6 and 7 and the spacing between the flaps 7 and 7 are adjacent to each other. The flaps 8 and 8 are separated from each other, the 8 and 9 are separated from each other, and the 9 and 9 are separated from each other, and the bottom plate forming flaps 6 and the upper lid forming flaps 8 at the lower end and the upper end of the one side plate 4 are formed in the forming portion of the stop substitute flap 10. Cutting device (slotter) for cutting the excess corrugated board on the side
Consists of upper and lower holders that rotate around mutually parallel axes, with cutting blades attached to each other, and the corrugated board moves and passes between the cutting blades attached to the upper and lower holders. The predetermined part of is separated. For more details,
The upper holder has a male cutting tool (moving knife,
(Fixed blade) is attached to the lower holder, a female cutting blade is attached to the lower holder, and the cutting blade of the upper holder is inserted into the cutting blade of the lower holder, The corrugated board is cut by the edge part of the cutting tool and the edge part of the cutting tool of the lower holder.

FIG. 10 shows the relationship between the cutting tool attached to the upper holder and the cutting tool attached to the lower holder, and 11 is a female die attached to the lower rotary shaft 12. 2 is a cutting blade for cutting, and 13 is a male cutting blade attached to a rotary shaft 14 parallel to the rotary shaft 12. The male cutting blade 13 meshes with the female cutting blade 11 so that the edge portion of the female cutting blade 11 and the edge portion of the male cutting blade 13 corrugate the corrugated board. A predetermined portion of the plate 15 will be cut. During such cutting work, the corrugated board 15 is provided with a liner 2 formed by a crease roll on a line connecting the crease processing position and the cutting process position.
Is crushed from above and below by a crushing roll to prevent the breakage of the sheet, and the corrugated board 15 is rotated from above and below on both sides of the meshing portion between the female cutting blade 11 and the male cutting blade 13. Press roll 1 attached to shaft 14
6 and the pressing roll 17 attached to the rotating shaft 12 sandwiches and deforms, and moves in the cutting direction.

That is, the corrugated sheet 1 is formed by engaging the male cutting blade 13 with the female cutting blade 11.
The liner 2 sandwiching the liner is cut linearly, but the corrugated plate 1 sandwiched between the liner 2 is cut in a state in which the original wave shape is largely lost. That is, since the corrugated sheet 1 is crushed and cut while the original shape of the wave is greatly deformed, the direction of the wave at the positions of the cutting tools 11 and 13 is not uniform, and the corrugated plate is A whisker-like protrusion 18 (see FIG. 11) is generated on the corrugated plate 1 on the end face of the corrugated board 15, and the whiskers-like protrusion 18 is cut off when the packaging box 3 is assembled and falls inside the packaging box 3. In addition, there is a problem that the beard-like protrusions 18 are cut off and mixed into the stored object when the stored object is stored in the packaging box 3. In addition, the liner 2 is sharply cut by the cutting blades 11 and 13, and the hand is instantaneously rubbed against the end face of the liner 2 that is sharply cut during handling in the unfolded state or during assembly. There was a problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem and is a whisker-like protrusion of a corrugated sheet which is generated on an end face of a corrugated board during cutting by a male and female cutting blade. An object of the present invention is to provide a cutting tool for cutting a corrugated board so that the hand will not be cut even if the hand is rubbed against the end face of the liner.

[0007]

In order to solve this problem, the present invention is a male cutting tool used in combination with a female cutting tool for cutting corrugated board, and has a gentle curve. The gist of the present invention is that grooves having a V-shaped cross section are provided at appropriate intervals in the length direction of the blade portion that is curved in an arc shape. Further, the gist of the present invention is that the length of the groove is set to be larger than the depth of engagement with the female cutting blade + the thickness of the corrugated board in the portion to be cut.

With this configuration, in the male cutting blade used in combination with the female cutting blade for cutting the corrugated board, a V-shaped cross section or a cross section is formed at appropriate intervals in the length direction of the blade portion. By providing a groove with a semi-circular shape or a cross-sectional shape, the whisker-shaped protrusion of the corrugated sheet that was left on the end surface of the corrugated board in the past is the side of the blade in the rotational movement direction in the length direction of the blade. Cut off at the edge,
The whisker-like protrusions on the end face of the corrugated board disappear. In addition, since the male cutting blade has grooves formed at appropriate intervals in the length direction of the blade, cutting is performed by meshing between the male cutting blade and the female cutting blade. As a result of the small protrusions being formed on the end face of the liner at appropriate intervals in the length direction of the liner, even if the end face of the liner is rubbed by the hand, the hands will not be cut and the cardboard packaging box is safe. Will be able to provide.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment shown in FIGS. 1 to 5 will be described. Reference numeral 21 is a female cutting blade attached to a lower rotary shaft 22 and 23.
Is a male-type cutting blade attached to a rotary shaft 24 parallel to the rotary shaft 22 and constitutes a slotter. And this male type cutting tool 2
3 is engaged with the female cutting blade 21 so that a predetermined portion of the corrugated board 25 is cut by the edge portion of the female cutting blade 21 and the edge portion of the male cutting blade 23. become. More specifically, during the cutting work, the corrugated board 25 is crushed from above and below by a crushing roll to prevent the liner from being broken by the crease roll on the line connecting the crease processing position and the cutting processing position, and Is the blade 2 for cutting the female die
1 and a pressing roll 26 attached to the rotary shaft 24 from above and below on both sides of the meshing portion between the male cutting tool 23 and the cutting tool 23.
It moves in the cutting direction while being sandwiched between the press roll 27 attached to the rotary shaft 22 and the deformed roll.

The male cutting tool 23 of the present embodiment
As shown in FIGS. 2 to 4, a blade portion 28 that is curved in an arc shape with a gentle curve in its side surface is provided, and one end of the cutting blade 23 has a corrugated cardboard plate 25 by the cutting blade 23. A blade portion 23a for cutting off one end of a scrap piece that is produced during cutting is cut from the corrugated board 25. More specifically, the blade portions 28 are formed on both sides in the thickness direction, and the edge portion 2 has a sharp tip at the tip.
9 is equipped. Grooves 30 having a V-shaped cross section are formed in the blade portions 28 on both sides at appropriate intervals in the length direction of the blade portions 28. The length of the groove 30 is determined by the depth of engagement between the male cutting blade 23 and the female cutting blade 21 + the corrugated board plate 25 of the portion to be cut.
And the depth of the groove 30 in the thickness direction of the blade 28 is gradually increased toward the tip of the blade 28. By forming such grooves 30 in the male cutting blade 23 at appropriate intervals in the length direction of the blade portion 28, the male cutting blade 23 meshes with the female cutting blade 21. When cutting a predetermined portion of the corrugated board 25 with a corrugated board, the corrugated board left on the end surface of the corrugated board 25 cut by meshing with the male cutting blade 23 and the female cutting blade 21 in the conventional example. The whisker-shaped protrusion 31 is cut off at the edge portion of the end on the upper side in the rotational movement direction of one of the grooves 30 in the lengthwise direction of the blade portion 28, and there is a whisker-shaped protrusion on the end surface of the corrugated board 25. Will not do. Further, since the grooves 28 on both sides of the male cutting tool 23 are formed with grooves 30 having a V-shaped cross section at appropriate intervals in the length direction of the blades 28, the cutting tool for male cutting is used. The V-shaped small projections are formed on the end faces of the liners 32 sandwiching the corrugated plates 31 cut by the engagement between the blades 23 and the female cutting blade 21 at appropriate intervals in the longitudinal direction of the end faces of the liners 32. 33 is formed. As a result, even if the hand is rubbed against the end face of the liner 32, the hand will not be cut, and a safe cardboard packaging box can be provided.

The male cutting tool 23 attached to the rotary shaft 24 includes a moving tool and a fixed tool,
Since both the moving blade and the fixed blade have the same shape, only one is shown in the drawings. Further, the male cutting blade 23 has blade portions 28 formed on both sides in the thickness direction and is used to separate adjacent flaps at the time of manufacturing a packaging box. In the male cutting tool used to cut off the excess corrugated board on the side of the bottom plate forming flaps and the upper lid forming flaps at the lower and upper ends of the side plates, the blade part is formed on one side in the thickness direction. It should be done.

By the way, in the above-described first embodiment, the blade portion 28 of the male cutting blade 23 has the blade portion 2
8, grooves 30 having a V-shaped cross section are provided at appropriate intervals in the length direction,
The small V-shaped protrusions 33 are formed on the end faces of the liners 32 at appropriate intervals in the length direction of the end faces of the liner 32. However, the groove 30 may have a semicircular cross section or a kite cross section. It is also possible to form small protrusions such as semicircles or ridges at appropriate intervals in the length direction of the end surface of the liner 32.

Next, a second embodiment shown in FIG. 6 will be described. In the first embodiment, the male cutting blade 23 has an edge portion 29 having a sharp angle at the tip thereof. However, similarly to the second embodiment, a male cutting tool 35 having a flat blade portion 34 at the tip has a V-shaped cross section (or a semi-circular cross section) at appropriate intervals in the length direction of the blade portion 34. Alternatively, a groove 36 having a cross section like a depression may be provided.

Although not shown in the drawings, a male-type cutting tool having a wavy highlight blade is also provided with a V-shaped cross section or a V-shaped cross section at appropriate intervals in the lengthwise direction of the blade. It is possible to provide a groove having a semicircular shape or a cross-sectional shape.

Further, the cutting tool used for cutting the corrugated board during the manufacture of the packaging box has been described above. Regarding the cutting tool used when manufacturing corrugated board products other than the packaging box, It goes without saying that the same can be carried out.

[0016]

As described above, according to the present invention, in a male cutting tool used in combination with a female cutting tool for cutting corrugated board, the length direction of the blade portion is appropriate. By providing grooves having a V-shaped section, a semi-circular section, or a recessed section at intervals, the whisker-shaped protrusions of the corrugated sheet, which were left on the end face of the corrugated board in the past, are located in any of the lengthwise directions of the blade section. The groove is cut off at the end on the upstream side in the rotational movement direction, and the whiskers-like protrusions on the end face of the corrugated board disappear. In addition, since the male cutting blade has grooves formed at appropriate intervals in the length direction of the blade, cutting is performed by meshing between the male cutting blade and the female cutting blade. As a result of the small protrusions being formed on the end face of the liner at appropriate intervals in the length direction of the liner, even if the end face of the liner is rubbed by the hand, the hands will not be cut and the cardboard packaging box is safe. Will be able to provide.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a relationship between a female cutting blade and a male cutting blade according to a first embodiment of the present invention.

FIG. 2 is a side view of the male cutting tool.

FIG. 3 is a cross-sectional view of the same male cutting blade.

FIG. 4 is an enlarged plan view of an essential part of the same male cutting tool.

FIG. 5 is an enlarged perspective view of a main part of a packaging box made of the same corrugated board.

FIG. 6 is a sectional view of a male cutting blade according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a corrugated board for explanation in a conventional example.

FIG. 8 is a development view of the packaging box.

FIG. 9 is a perspective view showing a state during assembly of the packaging box.

FIG. 10 is an explanatory view showing a relationship between the female cutting blade and the male cutting blade.

FIG. 11 is an enlarged perspective view of a main part of a packaging box made of the same corrugated board.

[Explanation of symbols]

21 Female cutting blade 23 Male type cutting tool 25 corrugated board 28 Blade 29 Edge 30 grooves 31 corrugated board 32 liner 33 Projection 34 blade 35 Male cutting blade 36 groove

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuhiko Kondo             650-2 Naganuma, Showa-cho, Kita-Katsushika-gun, Saitama             Limited company Fuji cutlery factory F term (reference) 3C027 UU01 UU08 VV04                 3E075 AA04 BA82 CA01 DB07 DB16                       GA02

Claims (2)

[Claims] 1. A male-type cutting tool used in combination with a female-type cutting tool for cutting corrugated board, at a proper interval in the lengthwise direction of the blades curved in a circular arc with a gentle curve. A cutting tool for corrugated board cutting, characterized in that a groove having a V-shaped cross section is provided in the. 2. The corrugated board according to claim 1, wherein the length of the groove is set to be larger than the depth of engagement with the female cutting blade + the thickness of the corrugated board in the portion to be cut. A blade for plate cutting.