JP2010284866A - Ruled line forming tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ruled line forming tool capable of putting a ruled line where a sheet material such as a corrugated cardboard can be exactly folded at a prescribed position by improving a face plate. <P>SOLUTION: In the ruled line forming tool constituted of a face plate 1 as a groove member and a ruled line-pressing member 23 which approach and separate to and from each other, wherein a recessed groove 2 is disposed on the face plate 1, the corrugated cardboard 51 is pushed into the recessed groove 2 with the ruled line pressing member 23 and thereby, a ruled line 52 is put onto the corrugated cardboard 51, a protrusion line 3 is formed toward the top end part of the ruled line pressing member 23 on the recessed groove 2, a thread undercut 23a facing the protrusion line 3 is disposed on the top end part of the ruled line pressing member 23 and the ruled line 52 forms a W shape cross section forming a plurality of groove parts 52a in parallel with one another on at least one surface of the corrugated cardboard 51 in accordance with sandwiching of the corrugated cardboard 51 between the face plate 1 and the ruled line pressing member 23. The ruled line 52 retains directivity in the length direction and, at the same time, is broadened in width and accordingly, the corrugated cardboard 51 can be folded without being affected by step parts 53. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ruled line forming tool for putting a ruled line for bending on a cardboard with a groove member and 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. 9, 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 cardboard 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. 11 and 12, 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 in a U shape, the desired effect of inducing bending 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 groove member and the ruled member.

  In order to solve the above-described problems, the present invention comprises a groove member and a ruled member that are close to and away from each other, and a groove is provided in the groove member, and the cardboard is pushed into the groove by the ruled member, and a ruled line that puts a ruled line in the cardboard In the forming tool, a protrusion is formed in the concave groove toward the tip of the ruled member, and a relief groove facing the protrusion of the groove member is provided at the tip of the ruler member, and the width of the groove is The width of the ruled member is set wider than that of the ruled member so that the cardboard has a W-shaped cross-sectional shape that forms a plurality of parallel grooved portions on at least one surface of the cardboard as the cardboard is sandwiched between the grooved member and the ruled member. In addition, the width of the opening of the escape groove is set to be larger than the width of the ridge.

  Further, in a ruled line forming tool for forming a ruled line in a cardboard by providing a groove in the groove member, pushing the cardboard into the groove with the ruled member, and pushing the groove into the groove. Two ridges that are parallel to the tip of the ruler member are formed, and a ruler ridge that is opposed to a valley portion sandwiched between the two ridges is provided at the tip of the ruler member, The width of the concave groove is set wider than the width of the ruled member, and as the corrugated cardboard is sandwiched between the groove member and the ruled member, the ruled line forms an overlapping W-shape with at least one surface of the cardboard. In addition, the width of the ruled member is set to a dimension equal to or larger than the distance between the outer surfaces of the plurality of parallel protrusions so that the cross-sectional shape becomes.

  When the ruled line forming tool according to the present invention is used, the ruled line is formed in a clear W-shaped or overlapping W-shaped cross-sectional shape with a large difference in height, and becomes wide while maintaining directionality in the length direction. Without being affected by this step, the cardboard can be accurately folded along the crushed portion of the ruled line, and a highly accurate box can be manufactured.

Sectional drawing which shows the state which mounted | wore the processing machine with the ruled line formation tool which concerns on 1st Embodiment of this invention 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 with the ruled line formation tool which concerns on 2nd Embodiment of this invention to the processing machine 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 attached the ruled line formation tool using the conventional face plate to the processing machine 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 the ruled line formation tool using the conventional groove member to a processing machine Sectional drawing which shows the ruled state by a groove member and a ruled member same as the above

  First, a first embodiment of the present invention will be described with reference to FIGS.

  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. Although the height dimension of this protrusion 3 is formed smaller than the depth dimension of the ditch | groove 2, it may be the same as this, or may be large.

  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.

  Further, as shown in FIG. 3, the ruler member 23 is formed with a V-shaped relief groove 23 a at the center of the lower tip opposite to the protrusion 3, and both the leading corners and relief grooves of the ruler member 23. Both shoulder portions of 23a are formed in a curved surface shape. The escape groove 23a may be U-shaped. Here, the width of the groove 2 is formed wider than the width of the ruled member 23. And the width | variety of the lower end opening part of the escape groove 23a is comparable as the width | variety of the protrusion 3, or has become a little wider.

  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.

  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. 3, the cardboard 51 is supplied in a flat state along the upper surface of the face plate 1 between the face plate 1 and the ruler member 23, and the upper surface of the cardboard 51 is positioned below the lower end of the ruler member 23. Let

  Next, from the state shown in FIG. 1 and FIG. 3, the lower board 12 with respect to the upper board 11 until both side portions of the lower end of the ruled member 23 are located below the upper surface of the corrugated cardboard 51 that is flat. When the ridge 3 and the ruled member 23 are brought close to each other, the corrugated cardboard 51 is sandwiched between the face plate 1 and the mold body 21, and the corrugated cardboard 51 is punched out by the cutting blade 22, thereby forming the outline of the box blank. Is done.

  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 surface of the groove 2 and is pushed up from the bottom of the groove 2 by the ridge 3 at the middle portion in the width direction of the ruled line 52 to chamfer 2a, 3a. And the curved surface portion of each end portion of the ruled member 23 is curved while being prevented from being broken.

  Thereby, the ruled line 52 is formed in a long W shape whose cross-sectional shape is symmetrical on both sides with respect to the center line in the width direction, and a pair of groove-shaped parts 52a recessed downward on the upper surface of the corrugated cardboard 51 on the back side of the box. And has a groove 52b sandwiched between the grooves 52a and recessed upward on the lower surface of the corrugated cardboard 51 on the front side of the box.

  Further, since the relief groove 23a is formed in the lower part of the ruled member 23 so as to face the protrusion 3, the upper surface side of the corrugated cardboard 51 having the rigidity pushed up by the protrusion 3 is escaped without being crushed so much. The groove 23a enters the groove 23a upward, and is sandwiched between the groove-shaped parts 52a and 52a that are depressed downward to form a protruding part that protrudes greatly upward, and the ruled line 52 has a W-shape as described above. Long formed.

  Note that, when the width of the opening of the escape groove 23a is wider than the width of the ridge 3, the upper surface side of the corrugated cardboard 51 is more likely to enter the escape groove 23a, so that even if the corrugated cardboard 51 is thick, a clear W-shape is formed. Ruled lines 52 can be formed.

  In this way, when a clear long W-shaped ruled line 52 having a large height difference between each groove-like part 52a, 52b and the protruding part is inserted without squeezing the cardboard 51 so much, the ruled line 52 is moved in the length direction. While maintaining the directivity, it becomes wider and curves evenly on both sides of the center line in the width direction, so that the corrugated cardboard 51 is moved along the groove 52b at the center of the ruled line 52 without being affected by the step of the corrugated cardboard 51. The box can be bent at an accurate position, 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.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  A face plate 1 as a groove member shown in FIG. 5 is made of 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 24 each having a linear length is mounted on the upper board 11 via the chase 13.

  As shown in FIGS. 6 and 7, the face plate 1 is formed with a long groove 2 by cutting the upper surface facing the lower end of the ruled member 23, and the bottom of the face plate 1 is parallel to the side surface of the groove 2. Two long elongated ridges 3 extending toward the bottom end of the ruled member 24 are formed. The width of the groove 2 is formed wider than the width of the ruled member 24. Although the height dimension of the protrusion 3 is formed smaller than the depth dimension of the concave groove 2, it may be the same as or larger than this.

  Further, chamfers 3 a are formed at the corners on both sides of the upper end of the protrusion 3, and chamfers 2 a are also formed at the upper ends of both sides of the groove 2.

  Further, as shown in FIG. 7, the ruled member 24 is opposed to an upper portion of a valley portion of the concave groove 2 defined by being sandwiched by the two protrusions 3 of the face plate 1 at the center portion of the lower end. A ruled ridge portion 24a is provided. Here, the width of the ruled member 24 is not less than the distance between the outer surfaces of the two ridges 3, and the width of the valley based on the interval between the two ridges 3 is the ruled ridge. It is wider than the width of the portion 24a.

  Further, chamfers 24b facing the chamfers 3a of the ridges 3 are formed on both sides of the lower end of the ruled ridges 24a. The face plates 1 and the chamfers 2a, 3a, 24b of the ruled member 24 may be curved surfaces as well as inclined planes.

  When such a face plate 1 is mounted on the processing machine shown in FIG. 5, the mold body 21 and the face plate 1 are positioned so that the center line in the width direction of the concave groove 2 and the ruled member 24 coincides.

  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. 7, the cardboard 51 is supplied in a flat state along the upper surface of the face plate 1 between the face plate 1 and the ruled member 24, and the upper surface of the cardboard 51 is positioned below the lower end of the ruled member 24. Let

  Next, from the state shown in FIG. 5 and FIG. 7, the lower board 12 with respect to the upper board 11 until both side portions of the lower end of the ruled member 24 are located below the upper surface of the corrugated cardboard 51. When the ridge 3 and the ruled member 24 are brought close to each other, the corrugated cardboard 51 is sandwiched between the face plate 1 and the mold body 21, and the corrugated cardboard 51 is punched by the cutting blade 22 to form the outline of the box blank. Is done.

  At this time, as shown in FIG. 8, the corrugated cardboard 51 having rigidity has the above-described approach between the long protrusion 3 and the ruled member 24 and the dimensional difference in the width direction between the concave groove 2 and the ruled member 24. Due to this, the ruled member 24 is pushed in on both sides of the groove 2 until it touches the bottom surface, and is pushed up from the bottom of the groove 2 by the two ridges 3, and the two ridges are formed by the ruled ridge 24a. 3 is pushed in until it comes into contact with the bottom surface of the groove 2, and is curved while being prevented from being broken by the chamfers 2 a and 3 a of the protrusion 3 and the chamfer 24 b of the ruled member 24.

  As a result, the ruled line 52 is formed in an elongated W shape whose cross-sectional shape is symmetrical on both sides with respect to the center line in the width direction, and has three groove shapes that are recessed downward on the upper surface of the corrugated cardboard 51 on the back side of the box. It has a portion 52a, and has two groove-like portions 52b sandwiched between the groove-like portions 52a and recessed upward on the lower surface of the corrugated cardboard 51 which is the front side of the box.

  A ruled ridge 24a is formed at the center of the lower end of the ruled member 24 so as to face the valley of the two ridges 3 provided so as to define the concave groove 2, and further, the width of the valley Since the dimension is formed larger than the width dimension of the ruled ridge portion 24a, the cardboard 51 having the rigidity pushed up by the ridge 3 and pushed down by the ruled ridge portion 24a is smoothly curved without being crushed so much. Then, the opposite side of the groove-like portions 52a and 52b is a long protruding portion that protrudes greatly, and the ruled line 52 is formed in an overlapping W shape as described above.

  In this way, by forming the three and two groove-like portions 52a and 52b and the protruding portions without squeezing the cardboard 51 so much, a clear and long overlapping W-shaped ruled line having a large height difference is formed. When 52 is inserted, the ruled line 52 becomes wide while maintaining the directionality in the length direction, and is bent evenly on both sides of the center line in the width direction. Therefore, the ruled line 52 is put in a direction parallel to the step 53 of the cardboard 51. Even in this case, the corrugated cardboard 51 can be bent at an accurate position along the groove 52a at the center of the ruled line 52 without being affected by the corrugated line 53 of the corrugated cardboard 51, and a highly accurate box is manufactured. can do.

  Further, by forming the concave grooves 2 corresponding to the plurality of ruled lines 52 directly on one 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 24 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 first and second embodiments, the ruled line forming tool is exemplified when the processing machine is a flat die cutter. However, the rotary die cutter performs punching and crease forming while feeding cardboard along with the rotation of the roll. Also in the ruled line forming tool used in the above, a similar ruled line can be obtained by providing the concave groove 2 and the protrusion 3 on the curved face plate and providing the relief groove 23a or the ruled protrusion 24a on the pressing ruled member opposed thereto. Putting can be done.

  Further, as the groove member, a metal face plate corresponding to the entire box forming blank is exemplified. However, as shown in FIG. 12, the groove member is a band-shaped plastic that is used by being attached to the dead plate 14 for each ruled line. It may be like a groove member 33 made of.

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 23a Escape groove 24 Ruled member 24a Ruled protrusion 24b Chamfer 51 Corrugated cardboard Ruled lines 52a, 52b Groove-shaped part 53 stage

Claims (5)

  In a ruled line forming tool that includes a groove member and a ruled member that approach and separate from each other, the groove member is provided with a concave groove, the cardboard is pushed into the groove with the ruler member, and a ruled line is formed in the cardboard. A ridge is formed toward the tip of the ridge, and a relief groove facing the ridge of the groove member is provided at the tip of the ridge member, and the width of the groove is set wider than the width of the ridge member, A ruled line forming tool characterized in that a ruled line has a W-shaped cross-sectional shape forming a plurality of parallel grooved parts on at least one surface of the cardboard as the cardboard is sandwiched between the groove member and the ruled line member.   The ruled line forming tool according to claim 1, wherein the width of the opening portion of the escape groove is set to a dimension equal to or larger than the width of the protrusion.   In a ruled line forming tool that includes a groove member and a ruled member that approach and separate from each other, the groove member is provided with a concave groove, the cardboard is pushed into the groove with the ruler member, and a ruled line is formed in the cardboard. Two ridges parallel to the tip of the ridge are formed, a ruled ridge facing the valley between the two ridges is provided at the tip of the ruler member, Is set to be wider than the width of the ruled member, and as the cardboard is sandwiched between the groove member and the ruled member, the ruled line forms a plurality of parallel groove-like sections on at least one surface of the cardboard. A ruled line forming tool characterized by having a shape.   The ruled line forming tool according to claim 3, wherein the width of the ruled line member is set to a dimension equal to or greater than the distance between the outer surfaces of the two protrusions.   5. The ruled line forming tool according to claim 3, wherein a width between valleys sandwiched between the two ridges is set to a dimension equal to or larger than a width of the ruled ridge portion.

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