JP4679301B2 - Cardboard sheet cutting and bending line forming apparatus - Google Patents

Description

  The present invention relates to a cardboard sheet cutting and bending line forming apparatus used when a packaging body such as a box is made from cardboard.

Conventionally, it is known to form a fold line on a cardboard sheet in order to fold the cardboard sheet. For example, as shown in FIG. 19, a fold line is formed by pressing a pressing tooth 30 having a rectangular cross section against a punching material 5S of the cardboard sheet. Is forming.
In such a case, even if the position Pm point where the center of the tip of the pusher tooth 30 abuts in the corrugated cardboard sheet punching material 5S that is to form a fold line is the regular fold position, as shown in FIG. It is not always bent at an appropriate position (Pm point).

  That is, as long as there is no such thing as a bending jig, folding as shown in FIG. 21 (the folding position is point P1 in FIG. 19) and FIG. 22 (the folding position is point P2 in FIG. 19). In some cases, the line is displaced from the normal position and bent at an inappropriate position.

  A cardboard sheet folding apparatus that can further improve the folding accuracy of a flap has been proposed (for example, see Patent Document 1).

  However, in Patent Document 1, the purpose of the apparatus is to fold the corrugated cardboard sheet, and it does not relate to the formation of the folding line of the corrugated cardboard sheet.

  In addition, the crease line part formed in the punching process is reinforced to prevent the crease line part from being bent in forming corrugated cardboard products, etc. A folding ruled line reinforcing member that can be bent well has been proposed (see, for example, Patent Document 2).

  However, in the above-mentioned Patent Document 2, there is a problem that the folding ruled line reinforcing member is complicated and includes many elements, and the production of such a reinforcing member is expensive.

  In addition, a sample processing apparatus capable of quickly and accurately cutting a thick material has been proposed (see, for example, Patent Document 3).

Such a proposal is also an apparatus for forming a cutting line of various shapes into a thick material, and does not solve the above problem.
JP 2002-307574 A JP 2004-148863 A Japanese Patent Laid-Open No. 10-175197

  The present invention has been proposed in view of the above-described problems of the prior art, and a folding line can be formed at an accurate position, and the assembly operation of the corrugated cardboard product can be facilitated by the accurate folding line. It is an object of the present invention to provide a cardboard sheet cutting and folding line forming apparatus that can improve the commercial value of the manufactured cardboard sheet product.

  According to the present invention, the continuous line of the tooth tip forms the contour shape (5S) of the corrugated cardboard sheet product on the substrate (4) and the linear folding line when assembling the product. A cutting tooth row (31) for cutting, and corrugated cardboard sheet cutting and folding line formation provided with pushing teeth (32A or 32B) on one side or both sides adjacent to the cutting tooth row (31) In the device (1), the cutting tooth row (31) is composed of a plurality of cutting teeth (31a) arranged at a predetermined interval (L2), and the pushing tooth (32A or 32B) is at its tip. Is a substantially rectangular cross section that forms a horizontal plane, is located closer to the substrate (4) than the tip of the cutting tooth (31a), and is chamfered at the tip corner on the opposite side of the cutting tooth row (31) (C Or R), and The contour punched tooth (2) is formed in a fine wave shape in which the profile (side view) of the tooth tip is rounded, and the contour punched tooth (2) has a contour. The punching portion (21) is composed of two nail punching portions (22) and insertion hole punching portions (23), respectively, and the bending line forming device (3A) has both longitudinal ends of the contour punching portion (21). It is the structure which is provided in the base of three insertion parts and the said insertion hole of two places, and manufactures the expansion | deployment shape of a triangular cylinder state (5) product from a cardboard sheet | seat.

The present invention has the following excellent effects.
(A) Since the cutting tooth row is composed of a plurality of spaced apart cutting teeth, the fold line of the corrugated cardboard sheet is partially cut, which makes it easy to bend and obtain a sharp fold line. be able to.
(B) Since there are a push tooth and a cutting tooth, the cutting tooth can be sufficiently held by the push tooth even if it is thin and sharp, and there is no deformation.
(C) A relatively narrow portion of the corrugated cardboard sheet is crushed by the pushing teeth, which makes it easy to bend.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show a corrugated cardboard folding line forming apparatus embodying the present invention, and the corrugated cardboard sheet folding line apparatus generally designated by reference numeral 3A has a length L1 arranged intermittently with a predetermined gap L2. The cutting tooth row 31 is composed of a plurality of cutting teeth 31a, and the pushing teeth 32A are arranged on both sides adjacent to the cutting tooth row 31. Both the cutting tooth row 31 and the pushing teeth 32A are mounted on the substrate 4.
The push teeth 32A are made of right and left push teeth 32a and 32b, and the left and right push teeth 32a and 32b have a substantially rectangular cross section whose tip is a horizontal plane, and are on the side away from the cutting teeth 32a. A chamfer C, which is a chamfered portion, is formed at the tip corner. And the front-end | tip of the cutting tooth | gear 32a protrudes in the non-board | substrate side from the front-end | tip of 32 A of pushing teeth.

  As shown in FIG. 2, the total width W of the pushing teeth 32A and the projection amount H of the cutting teeth 31a from the muscle pushing teeth 32A are appropriately determined depending on the material of the corrugated cardboard sheet. Is set to be slightly larger than the thickness of the cardboard sheet.

  FIG. 3 shows a modification of this embodiment. The left and right teeth 32ar and 32br of the muscle pusher tooth 3Ar have a substantially rectangular cross section with the tip forming a horizontal plane, but on the side away from the cutting tooth 31a. A chamfered portion R is applied to the tip corner.

  Next, as a specific example of the present invention, for example, a case where a corrugated cardboard sheet is folded to form a triangular tube state 5 as shown in FIG. 4 will be described.

This triangular cylinder state 5 is manufactured from the development shown in FIG.
In FIG. 5, the solid line portion 52 is a punched line. Specifically, the punching line 52 includes a line 521 that forms the contour of a regular triangular cylindrical body, a claw 522 that is provided at two locations and maintains a state of being bent into a regular triangle, and two locations where the claw 522 is inserted. It is comprised with the insertion hole 523. FIG.
A line composed of three two-dot chain lines 531 and a two-dot chain line 532 at the base of the insertion hole 523 is a bent line 53 formed on the corrugated cardboard sheet 5S.

In FIG. 6, the contour punching tooth 2 is composed of a contour punching portion 21 for punching a contour portion of the cardboard sheet 5S, a nail punching portion 22 for punching the nail 522, and an insertion hole punching portion 23 for punching the insertion hole 523. Yes.
As shown in detail in FIG. 7, the contour punched teeth 2 (21, 22, 23) have a small fine wave shape in which the profile of the tooth tip is continuous with a protrusion 2 t having a rounded tip.

The apparatus 3A forms a folding line of the corrugated cardboard sheet 5S, and connects the positions corresponding to both ends of the corrugated cardboard sheet 5S in the longitudinal direction of the contour punched portion 21 and the roots of the two insertion holes. It is provided at a place corresponding to.
The present invention is suitable, for example, when making such a folded product of corrugated cardboard sheets.

    An embodiment of a cutting and folding line forming apparatus for forming a folding line at the same time as punching out the corrugated cardboard sheet shown in FIG. 5 is shown.

  In FIG. 6, a corrugated cardboard sheet cutting and bending line forming apparatus denoted as a whole by reference numeral 1 has a contour punched tooth 2 on the surface of a substrate 4 which is a flat plate, and a continuous line of the tooth tip has a contour shape of a corrugated cardboard product. A fold line forming apparatus 3A for forming a fold line when assembling the product of cardboard sheets is fixed.

    Therefore, if the corrugated cardboard sheet is pressed by a known press using the corrugated cardboard cutting and folding line forming apparatus 1, the one shown in FIG. 5 can be obtained in one operation.

  Next, a process of forming a fold line on the cardboard sheet 5S using the cardboard sheet fold line forming apparatus 3A will be described with reference to FIGS.

  First, in the process of FIG. 8, the apparatus 3A attached to a press machine (not shown) descends from the front liner 5a side of the cardboard sheet 5S composed of the front liner 5a, the center core 5c, and the back liner 5b. The front liner 5a and the core 5c are partially cut by the cutting teeth 31a of the device 3A. As described above, the cutting tooth row 31 includes a portion where the cutting teeth 31a are interrupted (region L2 in FIG. 1), which is not cut.

  In the next step shown in FIG. 9, the front liner 5a and the center core 5c are compressed and crushed by the push teeth 32a and 32b of the apparatus 3A, and the back liner 5b is partially cut by the cutting teeth 31a. Next, in FIG. 10, the device 3A is lowered to a predetermined stop position. In FIG. 9 and subsequent figures, symbol Ct indicates a fold line including a cut portion.

  FIG. 11 shows a corrugated cardboard sheet 5S in which the apparatus 3A is lifted and a fold line is formed. 4 shows a state where the corrugated cardboard sheet 5S is folded with a manual or an automatic folding machine at a position where there is a folding line Ct including a cut portion in order to assemble the product shape (packing member 5) of FIG.

Next, with reference to FIGS. 13 to 18, a corrugated cardboard folding line forming apparatus 3B as another embodiment will be described.
The embodiment of FIGS. 1 to 12 is an embodiment in which push teeth 32 </ b> A are arranged on both sides adjacent to the cutting tooth row 31. On the other hand, another embodiment of FIGS. 13 to 18 is an example in which the pushing teeth 32 </ b> B are arranged on one side adjacent to the cutting tooth row 31. Except that the push teeth 32B are arranged only on one side, it is substantially the same as the embodiment of FIGS.
Although the overall configuration is not shown, the cardboard sheet fold line forming apparatus is identified by the symbol B to be distinguished from the cardboard sheet fold line forming apparatus 3A of the above embodiment. In FIG. 14, the full width Wb of the device 3B and the protrusion amount H of the cutting teeth 31a from the pusher teeth 32B are appropriately determined depending on the material of the cardboard sheet.

  With reference to FIGS. 15-18, the process of forming a fold line in the corrugated-cardboard sheet | seat 5S using the fold line formation apparatus 3B of this another embodiment is demonstrated.

  First, in the process of FIG. 15, the apparatus 3B attached to a press machine (not shown) descends from the front liner 5a side of the cardboard sheet 5S, and the front liner 5a is partially cut by the cutting teeth 31a. .

  In the next step of FIG. 16, the front liner 5a and the center core 5c are compressed and crushed by the pushing teeth 32B of the device 3B, and the back liner 5b is partially cut by the cutting teeth 31a. Lower to the stop position.

  FIG. 17 shows the corrugated cardboard sheet 5S in which the apparatus 3B is raised and a fold line is formed. FIG. 18 shows a state in which the corrugated cardboard sheet 5S is folded by a manual or an automatic folding machine at a position where a folding line Ct including a cut portion is present in order to assemble the cardboard sheet 5S into the product shape of FIG.

  According to the present embodiment having the above-described configuration, the devices 3A and 3B are configured to partially cut the corrugated cardboard sheet 5S by a plurality of cutting teeth 31a arranged intermittently with a predetermined gap. Since it is always bent at the position where it is partially cut and the bending strength is relaxed, a sharp fold line can be formed at an accurate position.

  The assembly work of the product of the corrugated cardboard sheet 5S is facilitated by the accurate and sharp folding line thus formed.

  Since the assembled product of the corrugated cardboard sheet 5S is accurately folded by an accurate and sharp folding line, it has a good appearance and the product value is improved.

  When the product of the corrugated cardboard sheet 5S is assembled, the folding position correction process or the like is not entered midway, so that the assembly work can be performed in a short time.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

The perspective view explaining the structure of the corrugated-cardboard folding line formation apparatus which concerns on 1st Embodiment of this invention. The side view of FIG. The side view which shows the modification of FIG. The perspective view which shows an example of the package manufactured by implementing this invention. The expanded view for making the package of FIG. The figure which shows an example of the concrete cardboard sheet cutting and bending apparatus which implemented this invention in order to make the expanded view of FIG. The side view which shows the cutting tooth used in FIG. It is process drawing at the time of implementing 1st Embodiment of this invention, and is an initial stage process drawing. It is process drawing at the time of implementing 1st Embodiment of this invention, and is 2nd process drawing. FIG. 6 is a process diagram when carrying out the first embodiment of the present invention, and is a third process diagram. FIG. 5 is a process diagram when carrying out the first embodiment of the present invention, and is a final process diagram. The state diagram explaining the bending state after the last process at the time of implementing 1st Embodiment of this invention. The top view explaining the structure of the bending line formation apparatus which concerns on 2nd Embodiment of this invention. XX sectional drawing of FIG. It is process drawing at the time of implementing 2nd Embodiment of this invention, and an initial stage process drawing. It is process drawing at the time of implementing 2nd Embodiment of this invention, and is 2nd process drawing. It is process drawing at the time of implementing 2nd Embodiment of this invention, and is final process drawing. The state diagram explaining the bending state after the last process at the time of implementing 2nd Embodiment of this invention. Process drawing which showed the folding line formation process in a prior art. The state diagram which shows the state bent after the bending line formation process of the prior art in the appropriate position. The state figure which shows the state bent after the bending line formation process of a prior art, and in an incorrect position. The state figure which shows the state bent after another bending position formation process of a prior art, in another improper position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cardboard sheet cutting and fold line forming device 2, 21 ... Outline punching teeth 3A, 3B ... Cardboard sheet fold line forming device 4 ... Substrate 5 ... Packaging 5S ... Cardboard sheet 22 ... Cutting tooth 23 ... Insert hole punching part 31 ... Cutting tooth row 31a ... Cutting tooth 32a, 32b ... Pushing tooth

Claims (1)

  Contour punch teeth (2) in which the continuous line of the tooth tip forms the contour shape (5S) of the corrugated cardboard sheet product on the substrate (4), and a cutting tooth row for forming a linear folding line when assembling the product (31) and a cardboard sheet cutting and bending line forming device (1) provided with push teeth (32A or 32B) on one side or both sides adjacent to the cutting tooth row (31), The cutting tooth row (31) is composed of a plurality of cutting teeth (31a) arranged with a predetermined interval (L2), and the pushing tooth (32A or 32B) has a substantially rectangular cross-sectional shape, The tip is a horizontal plane, located closer to the substrate (4) than the tip of the cutting tooth (31a), and has a chamfered portion (C or R) at the tip corner opposite to the cutting tooth row (31). And the contour punching The tooth (2) is formed in a fine wave shape having a rounded protrusion (2t) with a rounded tip profile, and the contour punching tooth (2) is formed with a contour punching portion (21), respectively. It is composed of two nail punching portions (22) and insertion hole punching portions (23), and the fold line forming device (3A) connects the three ends in the longitudinal direction of the contour punching portion (21), and A cardboard sheet cutting and fold line forming device, which is provided at the base of two insertion holes and has a configuration of producing a triangular cylindrical state (5) product development shape from a cardboard sheet.

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