JP2010284864A - Groove member for forming ruled line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved groove member for forming ruled line capable of putting a ruled line where sheet material such as corrugated cardboard can be exactly folded at a prescribed position. <P>SOLUTION: In the groove member for forming ruled line in which a recessed groove 2 is formed oppositely to a ruled line pressing member 23, the corrugated cardboard 51 pressed by the ruled line pressing member 23 is received by the recessed groove 2 in accordance with approach of the ruled line pressing member 23 and, thereby, the ruled line 52 is put on the corrugated cardboard 51, a protrusion line 3 is formed toward the top end part of the ruled line pressing member 23 on the bottom part of the recessed groove 2, a chamfer 3a is formed on the upper end corner part of the protrusion line 3 disposed in parallel with side surfaces of the recessed groove 2 and the corrugated cardboard 51 is sandwiched and crushed by the protrusion line 3 and the ruled line pressing member 23 on an intermediate part in the width direction of the ruled line 52. The ruled line 52 is curved in a W shape cross section, the central part of the W shape cross section is crushed and, accordingly, the corrugated cardboard 51 can be folded without being affected by the step parts 53. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ruled line forming groove member for placing a bent ruled line on a corrugated board when pressed by a ruled member.

  When a corrugated cardboard is punched to form a ruled line and bent along the ruled line to form a box, the cardboard is not bent accurately along the ruled line, which may cause a defect. In particular, when corrugated cardboard is folded along a ruled line in the corrugated direction, which is the direction in which the corrugated core step between the corrugated cardboard liners extends, the positional relationship and angle between the corrugated line and the folding position must be constant. Therefore, there is a high possibility that the bending position is deviated from the predetermined position.

  As a countermeasure, as shown in FIG. 5, in a processing machine such as a die cutter provided with an upper board 11 and a lower board 12, a mold provided with a long cutting edge 22 and a ruled member 23 on the upper board 11 via a chase 13. The body 21 is mounted, and a metal face plate 31 as a groove member having a long concave groove 32 is mounted on the lower board 12 via the dead plate 14, whereby the corrugated cardboard 51 is punched and creased. ing.

  In this case, when the corrugated board 51 sandwiched between the mold body 21 and the face plate 31 is punched with the cutting blade 22 as the upper board 11 and the lower board 12 approach, as shown in FIG. The cardboard 51 is pressed into the concave groove 32 and pressed into the groove 32, thereby forming a deep and long ruled line 52 along the direction of the step 53 (see Patent Document 1 below).

  Further, as shown in FIGS. 7 and 8, in addition to a long ruled member 23 for putting a ruled line for bending, a ruled member 24 intersecting with the mold 21 is held and fixed by a holder 25. In addition, it has also been proposed that a band-shaped plastic groove member 33 having a long concave groove 34 is attached to the dead plate 14 for each ruled line to perform a ruled process.

  In this case, the ruled member 23 is pressed against the cardboard 51, and the cardboard 51 is pushed into the concave groove 34 to form a deep and long ruled line 52 in the cardboard 51, and a shallow ruled line 52c intersecting the ruled line 52 by the ruled member 24. Form. Thereby, the stress at the time of bending concentrates on the ruled line 52, and the corrugated board 51 becomes easy to bend along the ruled line 52 (refer patent document 2 below).

JP 2003-145492 A JP-A-9-70905

  However, even if the ruled line 52 is inserted using the face plate 31 as the groove member having the concave groove 32 as described above, the ruled line 52 is not sufficiently deep and clear depending on conditions such as the cardboard thickness and paper quality. Since the cardboard is only curved and is not crushed in the thickness direction, the desired effect of inducing folding along the ruled line 52 may not be obtained.

  Further, when the groove member 33 is used, it takes time and effort to frequently replace the groove member 33 due to the deterioration of the groove member 33, and the groove member 33 is detached from the dead plate 14 during the punching operation and mixed into the product. Besides, there is a problem that the appearance of the cardboard 51 is deteriorated by the ruled line 52c inserted by the ruled member 24.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a ruled line for accurately folding a cardboard at a predetermined position by improving the ruled line forming groove member.

  In order to solve the above-described problems, in the present invention, a concave groove is formed facing the ruled member, and the cardboard pressed by the ruled member is received by the concave groove with the approach to the ruled member. In the ruled line forming groove member for putting a ruled line in the cardboard, a protrusion is formed at the bottom of the groove toward the tip of the ruled member, and the upper end corner of the protrusion parallel to the side of the groove is chamfered. Since the corrugated cardboard is pressed and crushed by the protrusion and the ruled member in the middle part of the ruled line in the width direction, and the height of the protrusion is set smaller than the depth of the groove is there.

  When the ruled line forming groove member according to the present invention is used, the ruled line is curved into a W-shaped cross section by the ridge, and the portion sandwiched between the ridge and the ruled member is crushed. Without being subjected to this, the cardboard can be accurately folded along the crushed portion of the ruled line, and a highly accurate box can be manufactured.

  In addition, since the height of the ridge is set smaller than the depth of the groove, the cardboard can be pushed deeply into the groove until it touches the bottom surface of the groove, and the cardboard is curved into a clear W shape. In that case, the cardboard is hard to tear.

Sectional drawing which shows the state which mounted | wore the processing machine with the face plate as a ruled line formation groove | channel member based on this invention, and a ruled line member Sectional drawing which shows the attachment state to the dead plate of a face plate same as the above Sectional drawing which shows the state which supplied the corrugated board between the face plate same as the above, and a ruled member Sectional drawing which shows the ruled state by a face plate and a ruled member same as the above Sectional drawing which shows the state which mounted | wore the processing machine with the face plate and the crease member as the conventional groove member for ruled line formation Sectional drawing which shows the ruled state by a face plate and a ruled member same as the above Sectional drawing which shows the state which mounted | wore the other conventional ruled line formation groove member and the crease member to the processing machine Sectional drawing which shows the ruled state by a groove member and a ruled member same as the above

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  A face plate 1 as a groove member shown in FIG. 1 is made of a metal such as stainless steel, and is attached to a lower plate 12 of a processing machine, which is a flat die cutter provided with an upper plate 11 and a lower plate 12, via a dead plate 14. Is done. In this processing machine, the lower board 12 moves up and down with respect to the upper board 11, or the upper board 11 moves up and down with respect to the lower board 12, or both the upper board 11 and the lower board 12 move up and down. 11 and the lower board 12 approach and separate relatively.

  A mold body 21 having cutting edges 22 and ruled members 23 each having a linear length is mounted on the upper board 11 via the chase 13.

  As shown in FIGS. 2 and 3, the face plate 1 is formed with a long concave groove 2 by cutting the upper surface facing the lower end of the ruled member 23, and the concave groove 2 is formed in the middle portion in the width direction of the bottom portion. A protrusion 3 extending long in parallel with the side surface and narrower than the ruled member 23 is formed toward the lower end of the ruled member 23. It is preferable that the height of the protrusion 3 is smaller than the depth of the groove 2.

  Chamfers 3 a are formed at corners parallel to the side surfaces of the concave groove 2 on both sides of the upper end of the ridge 3. Further, chamfers 2 a are also formed at the upper ends of both side surfaces of the groove 2. These chamfers 2a and 3a may be curved surfaces as well as inclined planes.

  When such a face plate 1 is mounted on the processing machine shown in FIG. 1, the mold body 21 and the face plate 1 are positioned so that the center line in the width direction of the groove 2 and the ruled line member 23 coincides. Here, the width of the groove 2 is wider than the width of the ruled member 23.

  Now, in order to produce a blank for forming a box, in order to punch out the cardboard 51 and put a ruled line, the lower plate 12 is lowered with respect to the upper plate 11, and the face plate 1 and the mold body 21 are separated from each other. As shown in FIG. 3, the corrugated cardboard 51 is supplied between the face plate 1 and the ruled member 23 in a flat state along the upper surface of the face plate 1. Here, a case where a square rule with a flat tip is used as the ruled member 23 is illustrated.

  Next, from the state shown in FIG. 1 and FIG. 3, the distance between the upper end of the ridge 3 and the lower end of the ruled member 23 is a size corresponding to the total thickness of the paper (liner and core) constituting the cardboard 51. When the lower board 12 is raised with respect to the upper board 11 so as to bring them closer to each other, the cardboard 51 is sandwiched between the face plate 1 and the mold body 21, and the cardboard 51 is punched by the cutting blade 22, and the box A blank contour is formed. In this state, the lower end portion of the ruled line member 23 is positioned below the upper surface of the corrugated cardboard 51 that has been flat.

  At this time, as shown in FIG. 4, the corrugated cardboard 51 having rigidity has the above-mentioned approach between the long ridge 3 and the ruled member 23 and the dimensional difference between the concave groove 2 and the ruled member 23 in the width direction. Due to the pressing of the ruled member 23, it is pushed in until it touches the bottom of the groove 2, and is pushed up from the bottom of the groove 2 at the middle in the width direction of the ruled line 52 by the protrusion 3 at the bottom of the groove 2. Then, it is pinched by the protrusion 3 and the ruled member 23, and is bent in a W shape while being prevented from being broken by the chamfers 2a and 3a.

  Further, since the width of the ridge 3 is narrower than the width of the ruled member 23 and the height dimension of the ridge 3 is set smaller than the depth dimension of the groove 2, the corrugated cardboard 51 is in contact with the bottom surface of the groove 2. Can be pushed deeply into the concave groove 2, and the corrugated cardboard 51 is curved into a clear W-shape, and at that time, the corrugated cardboard 51 is hardly broken.

  In this way, the ruled line 52 is formed long in a cross-sectionally W-shaped shape symmetrical on both sides with respect to the center line in the width direction, and a pair of groove-shaped portions recessed downward on the upper surface of the corrugated cardboard 51 on the back side of the box 52a, the lower surface of the corrugated cardboard 51 on the front side of the box has a grooved part 52b sandwiched by the grooved part 52a and recessed upward, and the corrugated cardboard 51 is a part corresponding to the grooved part 52b. Are crushed and weakened by the pinching force between the protrusion 3 and the ruled member 23.

  When such a long W-shaped ruled line 52 is inserted, the core of the cardboard 51 is evenly curved on both sides of the center line in the width direction of the ruled line 52, and is strongly crushed and weakened in the middle part in the width direction. Even when the ruled line 52 is inserted in a direction parallel to the step 53 of the cardboard 51, the cardboard 51 is accurately bent along the center line in the width direction of the ruled line 52 without being affected by the step of the cardboard. And a highly accurate box can be manufactured.

  Further, by forming the concave grooves 2 corresponding to the plurality of ruled lines 52 directly on the single face plate 1, the workability of mounting on the processing machine is improved, and the positional accuracy of the concave grooves 2 with respect to the ruled member 23 is also improved. The occurrence of defects due to peeling from the dead plate 14 can be prevented.

  Furthermore, by using a metal plate having a high hardness as the material of the face plate 1 and improving the durability, it is possible to save labor for replacement.

  In the above embodiment, the face plate as a groove member in the case where the processing machine is a flat die cutter has been exemplified. However, also in the face plate as a curved groove member used in the rotary die cutter, the concave groove 2 and the ridge are provided. 3 is provided, it is possible to perform the same ruled processing.

  Further, as the groove member, a metal face plate corresponding to the entire box forming blank is illustrated, but the groove member is used as a belt-like plastic that is attached to the dead plate 14 for each ruled line as shown in FIG. It may be like a groove member 33 made of.

  Further, as the ruler member 23, a member having a flat bottom end is illustrated, but a protrusion opposite to the protrusion 3 of the groove 2 is formed at the lower end of the ruler member 23, and this protrusion and the protrusion are formed. You may make it make both approach so that the space | interval of the stripe | line | column 3 may become the dimension close | similar to the dimension for the total thickness of the paper (liner and core) which comprises the cardboard 51. FIG.

DESCRIPTION OF SYMBOLS 1 Face plate 2 Groove 2a Chamfer 3 Projection 3a Chamfer 11 Upper board 12 Lower board 13 Chase 14 Dead plate 21 Mold body 22 Cutting edge 23 Ruled member 51 Corrugated cardboard 52 Ruled line 52a, 52b Groove part 53 Stage

Claims (2)

  A groove for forming a ruled line that forms a concave groove facing the ruled member, receives the corrugated cardboard pressed by the ruled member with the concave groove as it approaches the ruled member, and puts a ruled line on the cardboard. A ridge is formed at the bottom of the groove toward the tip of the ruled member, and a chamfer is formed at the upper corner of the ridge parallel to the side of the groove, and the width direction of the ruled line by the ridge and the ruled member A ruled line forming groove member characterized in that a corrugated cardboard is pinched and crushed at an intermediate portion.   2. The ruled line forming groove member according to claim 1, wherein a height dimension of the protrusion is set to be smaller than a depth dimension of the concave groove.

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