JP2016074136A5 - - Google Patents

Description

The method for preventing warping of corrugated cardboard according to the present invention made to solve the above problems is as follows.
Put a plurality of ruled lines with a width of 1 to 10 times the wave pitch in the direction perpendicular to the wave of the cardboard, with an interval of 2 to 10 times the wave pitch in the direction parallel to the wave. It is characterized by.

A cardboard warpage preventing device according to the present invention, which has been made to solve the above problems,
In a direction perpendicular to the corrugations of the cardboard, the press ruling of 1-10 times the width of the pitch of the wave, plural put at a 2-10 fold intervals of a pitch of the wave in the direction parallel to the wave th It is characterized by comprising a pressing rule forming means.

The top view (a) and side view (b) which show the schematic structure of the corrugated-cardboard blank manufacturing apparatus provided with the corrugated-card warpage prevention apparatus which is one Example of this invention. The side view (a) and front view (b) of the corrugated-cardboard warpage prevention device of the same embodiment. The flowchart which shows the procedure which manufactures a blank with the cardboard blank manufacturing apparatus provided with the cardboard warpage prevention apparatus of the Example. The side view (a) and front view (b) of the corrugated cardboard warpage prevention device of the same example which processes a single-sided cardboard sheet, and the top view (c) of one processed single-sided cardboard sheet. Front view of corrugated cardboard warpage prevention device according to another embodiment of the present invention (a), a view showing the upper roller close to the lower roller (b), showing the position of the upper and lower rollers and the single-sided cardboard sheet Side view (c) and plan view (d) and front view (e) of the processed single-sided cardboard sheet. The figure which shows the example of the dimension of each part of a cardboard blank.

When all the settings are completed, the control device 70 controls the conveying device 20, the corrugated board warpage preventing device 50, the vertical cutting device 30, and the horizontal cutting device 40 according to a predetermined program. Specifically, it is as follows.
First, the single-stage sheet P is pulled out from the roll-shaped single-stage sheet P1 at a constant speed v by the roller conveyor 22a of the conveying device 20 (step S13). When it is time to lower the upper roll, the upper roller 51 is moved by the upper roller vertical movement mechanism 57 so that the maximum diameter portion of the pressing portions 55a to 55d substantially contacts the maximum diameter portion of the pressing portions 56a to 56d of the lower roller 52. until down, pressing the Katadan sheet P pressing part 55a-56a of the rollers 52 and 53, 55b chromatography 56b, between 55c over 56c, 55 d -56d (step S14, see FIG. 4). Thereafter, the upper roller 51 is rotationally driven by the rotation mechanism 58 at the same speed as the speed v at which the single-stage sheet P is conveyed. The lower roller 52 is driven by the upper roller 51 via the single-stage sheet P and rotates (step S15). As a result, as shown in FIG. 4 (c), four creases Q1 are formed on the single-stage sheet P in the direction perpendicular to the wave pattern. When these push rules Q1 are formed by a predetermined length BL1 in the longitudinal direction (conveying direction) of the single-stage sheet P and the timing for raising the upper roller is reached, the upper roller 51 is raised by the upper roller vertical movement mechanism 57 (step S16). ).

When cutting in the width direction of the single-stage sheet P, the transport device 20 is stopped when the cutting position is reached, and the horizontal cutting unit 43 is moved over the upper guide rail 42 by the horizontal movement mechanism 44 of the horizontal cutting device 40. Move to the cut start position. At the cutting start position, the horizontal cutting blade vertical movement mechanism 45 lowers the cutting edge onto the single-stage sheet P, and the left-right movement mechanism 44 moves the single-stage sheet P to the cutting end position. Thereby, the cut in the width direction is made in the single-stage sheet P (step S1 8 ). At this time, a cut is made over the entire width of the single-stage sheet P at both ends in the longitudinal direction of one cardboard blank, and the cardboard blank is cut into individual cardboard blanks. The cardboard blanks sequentially manufactured in this way may eventually be stocked in a receiving portion (not shown) or may be transported to an automatic box making apparatus further provided downstream.

As described above, the upper roll of the other end (rear end side) of one blank is lowered while the vertical cutting device 30 and the horizontal cutting device 40 make a vertical cut and a horizontal cut. At the timing, the above steps S14 to S16 are performed. In this embodiment, since the stamped rule Q1 is formed before the cut is made , in the portion where the cut that becomes the boundary between the blank and the blank is made by the crossing device 40 (the portion B in FIG. 1A), The upper roll is kept lowered, and a pressing rule Q1 is continuously formed across both ends of the two blanks.

DESCRIPTION OF SYMBOLS 10 ... Corrugated-cardboard blank manufacturing apparatus 20 ... Conveyance apparatus 21 ... Support part 22 ... Roller conveyor 30 ... Vertical cutting apparatus 31 ... Support stand 32 ... Frame 33 ... Vertical cutting unit 34 ... Left-right moving mechanism 35 ... Vertical cutting blade up-and-down moving mechanism 40 ... Crossing device 41 ... support base 42 ... guide rail 43 ... crossing unit 44 ... left and right moving mechanism 45 ... horizontal cutting blade vertical movement mechanism 50 ... corrugated cardboard warpage preventing device 5 1 ... upper roller 5 2 ... lower roller 53, 54 ... shaft Portions 55a to 55d, 56a to 56d ... Pressing portions 57, 85 ... Upper roller vertical movement mechanism 58 ... Rotation mechanism 70 ... Control device 71 ... Control panel 80 ... Cardboard warpage prevention device 81 ... Upper roller 82 ... Convex portion 83 ... Lower roller 84: Recess 85: Upper roller vertical movement mechanism
P, P2 ... Corrugated cardboard sheet
P1 ... Roll-shaped single-stage sheet
Q1, Q2 ... pressed ruled lines

Claims (9)

In a direction perpendicular to the corrugations of the cardboard, the press ruling of 1-10 times the width of the pitch of the wave, plural put at a 2-10 fold intervals of a pitch of the wave in the direction parallel to the wave th A method for preventing warping of corrugated cardboard. The push Kay, without crushing the corrugated plate of the corrugated board, warpage prevention of cardboard according to claim 1, concave portions and convex portions in a direction parallel and forms a wavy unevenness arranged alternately in the wave th Method. The pre Ki押 was ruling, warpage prevention of cardboard according to claim 1 or 2, characterized in that formed at 10 to 100 times the length of the pitch of the wave from the end of the parallel side to the corrugations of the corrugated cardboard Method. In a direction perpendicular to the corrugations of the cardboard, the press ruling of 1-10 times the width of the pitch of the wave, plural put at a 2-10 fold intervals of a pitch of the wave in the direction parallel to the wave th A corrugated cardboard warpage prevention device comprising a ruled line forming means for the purpose. Said push ruffled forming means, and the roller put Totsukei in a direction perpendicular to the corrugations of the front Symbol cardboard, according to claim 4, characterized in that it comprises a roller to put凹罫corresponding to the convex ruffled Corrugated cardboard warpage prevention device. Press ruling extending in a direction perpendicular to the corrugations of the cardboard, without crushing the corrugated plate of the corrugated board by placing side by side a plurality of the direction parallel to the wave th and the recess in a direction parallel to the wave th A method for preventing warping of corrugated cardboard, comprising forming wavy irregularities in which convex portions are alternately arranged . Press ruling extending in a direction perpendicular to the corrugations of the cardboard, without crushing the corrugated plate of the corrugated board, a press ruffled forming means for entering side by side a plurality of the direction parallel to the wave th pre Symbol cardboard cardboard warpage prevention device, characterized in that it comprises a pushing ruling forming means having a roller put Totsukei in a direction perpendicular to the corrugations, and a roller to put凹罫corresponding to the convex ruffled the. a) conveying means for conveying a corrugated sheet made of corrugated sheets and flat plates drawn from a roll in a direction orthogonal to the corrugations of the corrugated sheets;
b) the corrugated cardboard warpage preventing device according to claim 4, 5 or 7;
c) a longitudinal cutting device for cutting the cardboard sheet in a direction perpendicular to the corrugation,
d) a crossing device that cuts the cardboard sheet in a direction along the corrugation of the cardboard sheet;
and the size setting means for receiving information of the size of e) cardboard box,
f) a cutting position determining means for determining the size of the corrugated cardboard blank from the size information and the cutting position by the vertical cutting apparatus and the horizontal cutting apparatus;
g) A corrugated board blank manufacturing apparatus comprising: a vertical cutting device and a control means for controlling the horizontal cutting device based on the cutting position determined by the cutting position determining means.   The corrugated board blank manufacturing apparatus according to claim 8, wherein the corrugated board warpage preventing apparatus is provided upstream of the longitudinal cutting apparatus and the transverse cutting apparatus.