JP2002001835A - Molded sheet for manufacturing box of corrugated board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molded sheet for manufacturing a box of a corrugated board by which loss of a blank sheet caused by flat mold punching is decreased as much as possible and a micro-corrugated board box in which either the corrugated board or a paper board can be distinguished when the box is manufactured while a cut edge leaving a step division is partly left can be manufactured. SOLUTION: At a stage of paper feeding or its initial movement before the blank sheet 10 of the corrugated board to be punched by means of a flat mold punching machine 20 is guided to the flat mold punching machine 20, the front end is formed into an added flap 11 or a flap provided with a holding flap part 111 and after notches 110 for forming a part or the whole of both side edges of the added flap 11 or the flap are provided on the holding flap part 111, the holding flap part 111 with the notches 110 is spiked 31 or gripped to be guided to the flat mold punching machine 20 and the blank sheet 10 is punched except the notches 110 of the holding flap part 111 to manufacture the molded sheet 13 for manufacturing the box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard box-formed sheet punched by a flat punching machine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, in order to manufacture a predetermined corrugated cardboard box forming sheet 2 using a flat punching machine 7, when blank sheets 1 are punched, a sheet feeder is required. A cut margin 3 is provided at the front end of the blank sheet 1 that has been spliced 5 or gripped and transported to a flat punching machine 7. However, the spike 5 formed at the front end of the blank sheet 1 or the gripping margin 3 for gripping must be provided outside the punching blade (first blade) 6 of the box forming sheet 2. Every punching resulted in a loss. Therefore, in the flat punching step in which the blank sheet 1 of the wrap round occupies a large amount, the inventor of the present invention has set the holding allowance 3 of the box forming sheet 2 or the holding allowance 3 if the flap can be directly spiked or gripped for transportation. It has been found that loss can be reduced by eliminating it. In addition, a conventional corrugated cardboard box-forming sheet formed with flutes such as an F-stage and a G-stage is finished in a state where the cut edges of the box-forming sheet are crushed by conventional flat punching. Has a problem that cannot be easily determined due to the Containers and Packaging Recycling Law. Therefore, the present inventor has focused on the fact that the cutting by the single-blade rotary blade of the slitter scorer of the corrugator does not crush the step of the cut edge at all, and the front end of the micro corrugated cardboard blank sheet is used as a margin or a flap holding part, The present invention was completed by finding out that the cutout of the molded sheet for box-making can be shown and the step can be left in the box-making if the punching is not performed by the flat type punching machine.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a molded sheet for corrugated cardboard box making which minimizes the loss of a blank sheet due to flat punching. Also, the present invention provides a molded sheet for box making of micro cardboard,
Corrugated cardboard boxes with a cut edge leaving a part of the corrugation, so that it can be distinguished from cardboard or paperboard at the time of box making, and micro cardboard boxes conforming to the Containers and Packaging Recycling Law can be manufactured. A molded sheet is provided.

[0004]

According to the present invention, in order to achieve the above object, as shown in the drawing, a blank sheet 10 of corrugated cardboard to be punched by a flat punching machine 20 is fed before being guided to the flat punching machine 20. Alternatively, at the stage of the initial movement, the front end is formed as a set margin 11 or a flap provided with the grip margin portion 111, and the grip margin 111 is attached to the grip margin 1.
After making a cut 110 for forming a part or all of the side edges of the flap 1 or the flap, the holding portion 111 with the cut 110 is spiked 31 or gripped and led to the flat punching machine 20, and the cutting portion 111 is cut. 11
This is a molded sheet for cardboard box making by punching out the blank sheet 10 except 0. In the present invention, the margin of the front end of the blank sheet or the grip margin provided on the flap is the same size as the conventional grip margin, and the cuts in the traveling direction with respect to both side edges are
Even if it extends beyond the grip portion, that much may be removed from the flat stamping portion. The cutting of the grip portion is performed by a cutting blade or a rotary blade that moves up and down, as well as a jet of high-pressure water, which is disclosed in Japanese Patent Application Laid-Open No. 51-98582 or the like for cutting a corrugated cardboard sheet. For example, cutting of a corrugated cardboard sheet by a laser beam, which is disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-214, etc., may be used.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. In FIG. 1, a blank sheet 10
Is provided at the front end of a setting margin 11 for forming a glued piece or the like with a holding margin portion 111 for pulling and transporting by a spike or a grip.
In order to be out of the range of punching,
The cutting process of the both side edges of 1 needs to be performed at the stage of feeding the blank sheet 10 or feeding the blank sheet 10 to the flat punching machine 20 or at the initial movement stage.
In FIG. 2, the cutting process of both side edges of the grip margin portion is performed until the blank sheet 1 is conveyed to the flat punching machine 20.
A notch 110 is formed by the cutting blade 60 that moves up and down along the traveling direction of zero. The range in which the blank sheet 10 is punched by the flat punching machine 20 is indicated by a one-dot chain line 13.
Indicated by Dotted line 14 is a ruled line. Therefore, the molded sheet for box making of the present invention is manufactured as follows.
As shown in FIG. 2, the blank sheets 10 are stacked and fed, and are fed one by one by a kicker 70 onto a transfer table 71 of the initial movement of the sheet feeding, and are attached to the front end by a cutting blade 60 that moves up and down. Cuts 110 are formed on both side edges of the holding margin portion 111 of the margin 11, and then the spikes 31 are formed.
As a result, the pin 311 is driven into the holding margin portion 111 and is conveyed to the flat punching machine 20. As shown in FIG. 3, the flat plate punching machine 20 of this embodiment has a chess 21 in which a punching plate 210 is frame-tightened, and a cutting plate 22.
The blank sheet 10 placed on 1 is punched out of the formed sheet 13 except for the cut 110 by the punch cutting blade 211 (only the first blade is shown) by the vertical movement of the cutting table 22. The blank sheet 10 punched by the flat die punching machine 20 is further conveyed to the stripping device 40 by the spike 31, and the margin 112 is removed.
It is transported to the product drop 50.

[0006]

According to the present invention, the gripping portion formed before the conventional fitting margin becomes unnecessary, and the gripping portion is directly provided on the fitting margin or the flap, so that there is no loss of the gripping portion. Thus, it is possible to greatly contribute to a reduction in manufacturing cost of a molded sheet for cardboard box making. In addition, since the front end of the blank sheet is the front end of the molded sheet for box-making, the cutting cut by the single-edge rotary blade of the slitter scorer of the corrugator can be left as it is, and the micro cardboard box and the paperboard box can be easily distinguished. Thus, the manufacture of micro cardboard boxes in accordance with the Containers and Packaging Recycling Law has become possible.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a cardboard blank sheet showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing the principle of manufacturing a molded sheet for box making from the blank sheet of FIG.

FIG. 3 is an explanatory diagram when the blank sheet of FIG. 1 is conveyed to a flat punching machine.

FIG. 4 is an explanatory view of a conventional blank sheet.

FIG. 5 is an explanatory diagram when a conventional blank sheet is conveyed to a flat punching machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Blank sheet 11 Set-up allowance 110 Cut-in of cut-off allowance 111 Cut-off allowance 20 Flat punching machine 31 Spike

Claims (1)

[Claims] 1. A front end of a corrugated cardboard blank sheet to be punched by a flat punching machine is formed into a false allowance or a flap provided with a grip allowance in a sheet feeding or initial movement stage before being guided to the flat punching machine. After making a notch to form part or all of both sides of the flap in the holding margin, the splicing or gripping the cut margin is led to the flat punching machine, and the holding margin is set. Punch out the blank sheet except for the notch
A corrugated cardboard box forming sheet characterized by being a box forming sheet.