JP5307638B2 - Ruled line forming groove member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved groove member for forming a ruled line capable of putting a ruled line where a 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 is put on the corrugated cardboard 51, a step difference which is lowered from the upper part 1a of the opening side of the recessed groove 2 to the lower side is disposed on a part in the recessed groove 2, a middle pressing part 3 having a step difference surface at a height in the middle between the upper part 1a and the bottom part 2a of the recessed groove 2 is formed, and the middle pressing part 3 is extended repeatedly from one side lateral surface side to the other side lateral surface side in the length direction of the recessed groove 2, wherein a part except the middle pressing part 3 in the recessed groove 2 is made to be a recessed part 2b. Since a wavy molding step of a middle core is crushed so as to induce folding, the corrugated cardboard 51 can be folded exactly at the prescribed position without being affected by the step parts 53 of the corrugated cardboard 51. <P>COPYRIGHT: (C)2011,JPO&amp;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 the cardboard is bent along a ruled line in the cardboard direction, which is the direction in which the core of the cardboard core extends, there is a high possibility that the bent position will deviate from a predetermined position due to the effects of the cardboard.

  As a countermeasure, as shown in FIG. 9, a mold body 21 having a long cutting blade 22 and a ruled member 23 is attached to an upper panel 11 of a processing machine, which is a flat die cutter, via a chase 13. A strip-shaped plastic ruled line forming groove member 31 having a groove 32 wider than the long ruled member 23 is attached to the cardboard 51 via the dead plate 14, and the corrugated cardboard 51 is punched and creased. is there.

  In this case, when the cardboard 51 is punched with the cutting blade 22 as the upper board 11 and the lower board 12 approach, the ruler member 23 is pressed against the cardboard 51 as shown in FIGS. By pushing into the groove 32, a deep and long ruled line 52 is formed on the cardboard 51, so that the cardboard 51 is easily bent along the ruled line 52.

  Further, as shown in FIG. 12, as shown in FIG. 13, by using a mold body 21 in which the ruled member 23 is corrugated and provided with crushing members 24 having elasticity such as cork on both sides of the ruled member 23. In addition, it has also been proposed to put a wavy ruled line 52 in the cardboard 51.

  In this case, the ruled line 52 intermittently crosses the center step 53 and crushes the center, thereby reducing the average strength of the cardboard 51 at the position of the ruled line 52, so that the cardboard 51 is guided to the ruled line 52. It is easy to bend in parallel to the eyes (see Patent Document 1 below).

JP-A-11-10754

  However, even if the ruled line 52 is inserted using the groove member 31 having the concave groove 32 as described above, the ruled line 52 may not be sufficiently deep and clear depending on conditions such as the thickness of the cardboard 51 and paper quality. The desired effect may not be obtained.

  In particular, when the corrugated cardboard 51 is supplied in a state where the long extending step 53 is not parallel to the ruled member 23 extending long, the step 53 includes a portion to be crushed and a portion not to be crushed. Therefore, the ruled line 52 has a portion that is easily bent and a portion that is not easily bent, and the ruled line 52 becomes unclear and cannot be bent accurately.

  Further, when the mold body 21 having the wavy ruled member 23 is used, when the mold body 21 is manufactured, the ruled member 23 is curved, and a curved groove matching the curve of the ruled member 23 is formed on the wooden substrate of the mold body 21. The ruled member 23 must be accurately press-fitted into the curved groove, which requires a lot of labor and cost, and the ruled member 23 is liable to be damaged when driven.

  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 groove member for forming a ruled line for putting a ruled line on the cardboard, a step is formed in a part of the concave groove so as to be lowered from the upper part on the opening side of the concave groove, so that the intermediate height between the upper part and the bottom part of the concave groove is provided. An intermediate pressing portion having a step surface is formed on the surface, and the intermediate pressing portion is repeated in the length direction of the concave groove and extends from one side surface to the other side surface, excluding the intermediate pressing portion in the concave groove. The portion is a recess.

  When the ruled line forming groove member according to the present invention is used, a groove-like portion formed by a ruled member is formed on one surface of the corrugated cardboard as a ruled line, and the other surface of the corrugated cardboard is swelled by a concave portion and an intermediate pressing portion of the groove member. An exit portion and an immersion portion are formed, and the corrugated forming step of the core is crushed by the intermediate pressing portion, so that the ruled line is clearly inserted.

  When such a ruled line is inserted, the bulging part and the immersive part induce bending toward the groove-like part, so that the cardboard can be accurately placed at a predetermined position along the ruled line without being affected by the cardboard step. Can be folded.

  Further, if the intermediate pressing portion reaches from the one side surface of the concave groove to the other side surface, the immersive portion that has been weakened by crushing the cardboard can be lengthened.

The top view of one Embodiment of the groove member for ruled line formation concerning this invention Sectional view along line II-II The perspective view which shows the mounting state to the processing machine same as the above Sectional drawing which shows the supply state of the corrugated cardboard between a groove member same as the above, and a ruled member Sectional drawing which shows the ruled state by a groove member and a ruled member same as the above Plan view showing corrugated cardboard with ruled lines using the same groove member and ruled member The top view of other embodiment of the groove member for ruled line formation concerning this invention Sectional view along line VIII-VIII Sectional drawing which shows the state which mounted the groove member for ruled line formation in the processing machine Sectional drawing which shows the supply state of the corrugated cardboard between a groove member same as the above, and a ruled member Sectional drawing which shows the ruled state by a groove member and a ruled member same as the above The perspective view which shows the type | mold body provided with the conventional wavy ruled member Plan view showing corrugated cardboard with ruled lines using the same ruled member

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  The ruled line forming groove member 1 shown in FIGS. 1 to 3 is made of plastic such as bakelite, and is a plate extending in one direction in a strip shape. A groove 2 extending in the length direction is formed at the center of the groove member 1 on the side of the upper portion 1a so as to face the lower end of the ruled member 23.

  A part of the groove 2 is provided with a step that is lowered downward from the upper part 1 a of the groove member 1, and has an upper surface at an intermediate height between the upper part 1 a of the groove member 1 and the bottom part 2 a of the groove 2. The pressing portion 3 is partially formed, and a portion excluding the middle pressing portion 3 in the concave groove 2 is a concave portion 2b having the bottom portion 2a as a bottom surface.

  The intermediate pressing portion 3 has a triangular shape as the planar shape of the concave portion 2b, the bottom side thereof is positioned on one side surface of the concave groove 2, the apex angle portion is positioned on the other side surface side, and the adjacent concave portion 2b is formed. The shape is such that it is repeatedly arranged in the length direction of the concave groove 2 with an interval between the hypotenuses and alternately changing the direction, and the shape is uniform on both sides with respect to the center line of the concave groove 2. .

  The upper surface (step surface) of the intermediate pressing portion 3 reaches the other side surface from one side surface of the groove 2 and is continuous in the length direction of the groove 2.

  Further, in order to enable the crease processing as shown in FIG. 5, the width of the groove 2 is set to the width of the ruled member 23 and the thickness of each liner and the center of the corrugated cardboard 51 pushed into the groove 2. The ruled member 23 and the cardboard 51 enter the concave groove 2 together.

  Now, in order to manufacture a blank for forming a cardboard box, when punching the cardboard and putting a ruled line, the groove member 1 as described above is mounted on the processing machine as shown in FIG. Then, as shown in FIG. 3 and FIG. 4, the cardboard 51 is supplied between the groove member 1 and the ruled member 23 attached to the dead plate 14 of the processing machine while being separated. As the ruled member 23, a square rule with a flat tip is used.

  As shown in FIG. 5, when the corrugated cardboard 51 is punched, when the groove member 1 and the ruled line member 23 are brought close to each other, the corrugated cardboard 51 is pressed by the ruled line member 23 and the bottom portion 2 a of the concave groove 2. The corrugated forming step of the core is crushed by the intermediate pressing portion 3 which is pushed into the concave portion 2b so as to be in contact with the curved portion and curves downward and extends so as to intersect the step 53 of the core.

  At this time, as shown in FIGS. 5 and 6, as the ruled line 52, a groove-like portion 52 a curved downward by the ruled member 23 is formed on the upper surface of the cardboard 51, and the groove member 1 is formed on the lower surface of the cardboard 51. Due to the concave portion 2b and the intermediate pressing portion 3, the bulging portion 52b and the immersing portion 52c are formed in an equal shape on both sides with respect to the groove-like portion 52a.

  Even if the corrugated cardboard 51 is not supplied so that the long core step 53 extends parallel to the long ruled member 23, the corrugated forming step of the core is the concave groove 2. The middle pressing part 3 is crushed so as to cross the step 53, and the ruled line 52 is clearly inserted.

  When such a ruled line 52 is inserted, the bulging portion 52b and the immersive portion 52c induce bending toward the groove-like portion 52a, so that the corrugated formation step of the core of the corrugated cardboard 51 is not affected. The cardboard 51 can be accurately bent at a predetermined position along the ruled line 52, and a highly accurate box can be manufactured.

  Furthermore, since the bulging portion 52b and the immersing portion 52c are formed in a shape that is equal on both sides with respect to the groove-like portion 52a, the corrugated cardboard 51 can be bent more accurately along the ruled line 52 at a predetermined position.

  Moreover, since the groove member 1 can be formed of plastic that can be easily processed as a material, it is possible to obtain the effect of improving the bending accuracy while suppressing the cost.

  In the above embodiment, the bottom 2a of the concave groove 2 is illustrated as being closed by the bottom wall. However, if both side portions of the groove member 1 are connected by the intermediate pressing portion 3, the bottom 2a of the concave groove 2 is It may be opened as a through hole.

  Moreover, although it is preferable to provide the intermediate pressing portion 3 so as to reach both side surfaces of the concave groove 2 as in the above embodiment, for example, as shown in FIGS. 7 and 8, the end portion of the intermediate pressing portion 3 is provided. May not reach the side surface of the groove 2.

  That is, a stepped surface that is lowered downward from the upper portion 1a of the groove member 1 is provided in a part of the groove 2, and is repeated in the length direction of the groove 2 so as to extend from one side to the other side. If the intermediate pressing portions 3 are formed, even if each intermediate pressing portion 3 is discontinuous, the corrugated cardboard 51 is weakened because the intermediate core step 53 is crushed by the intermediate pressing portion 3 and becomes weak. It is possible to bend at a predetermined position along the ruled line 52 without being affected by the above.

  Further, in the above embodiment, the cardboard 51 is supplied between the groove member 1 and the ruled member 23 so that the step 53 of the cardboard 51 is substantially parallel to the ruled member 23 and is mounted on the groove member 1. Although the example of placing is shown, the same effect can be obtained also when the stage 53 and the ruled member 23 are supplied and placed so as to be substantially orthogonal to each other.

DESCRIPTION OF SYMBOLS 1 Groove member 1a Upper part 2 Groove | groove 2a Bottom part 2b Recessed part 3 Middle press part 11 Upper board 12 Lower board 13 Chase 14 Dead plate 21 Mold 22 Cutting edge 23 Ruled member 51 Corrugated cardboard 52 Ruled line 52a Groove part 52b Swell part 52c Immersion 53

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 part of the groove is provided with a step that decreases downward from the upper part on the opening side of the groove to form an intermediate pressing part having a step surface at a height intermediate between the upper part and the bottom of the groove. A ruled line forming groove characterized in that the pressing portion extends repeatedly from one side to the other side in the length direction of the concave groove, and a portion excluding the middle pressing portion in the concave groove is a concave portion. Element.   The ruled line forming groove member according to claim 1, wherein the intermediate pressing portion reaches from one side surface of the concave groove to the other side surface.

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