JP2014087816A - Manufacturing device for honeycomb core and manufacturing method for honeycomb core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the productivity of a honeycomb core having an arbitrary outer shape.SOLUTION: A manufacturing device 1 for a honeycomb core includes: a conveying device 11 which conveys a base material 2 having unevenness formed in a thickness direction; cut forming devices 21, 31 which form cuts in the base material 2 from one side and the other side in the thickness direction; a bending device 41 which bends the base material 2 in the thickness direction according to the cuts formed by the cut forming devices 21, 31; and control means for controlling the cut forming devices 21, 31 on the basis of shapes and positions of the cuts corresponding to the outer shape of a target honeycomb core to be formed.

Description

  The present invention relates to a honeycomb core manufacturing apparatus and a honeycomb core manufacturing method.

As techniques for producing a honeycomb core that is lightweight and can achieve high rigidity and high strength, techniques described in Patent Documents 1 and 2 below are conventionally known.
In Patent Document 1 (Japanese Patent Laid-Open No. 2001-38832), an adhesive is applied in a streak pattern at predetermined intervals on a sheet, and the sheets are stacked by shifting the position of the adhesive by half a pitch. A technique for forming a honeycomb core by heating the laminate to harden a thermosetting adhesive and then widening the interval between sheets, a so-called stretch-type honeycomb core manufacturing method is described.

  In Patent Document 2 (Japanese Patent Application Laid-Open No. 2006-21238), a plate base material (27) is cut into a curved shape by a cutter (29), and then the plate base material (27) has a predetermined shape as in Patent Document 1. Adhesives are applied in stripes at intervals, the positions of the adhesives are shifted by half a pitch, the plate base materials (27) are stacked, and the laminate of the plate base materials (27) is placed in a heat treatment furnace to be thermosetting. A technique is described in which a honeycomb core is formed by a stretching method by widening the interval between sheets after the adhesive is heated and hardened.

  In Non-Patent Document 1, an uncut portion is arranged with a predetermined interval on one sheet of paper, and a combination of mountain folds and valley folds is periodically combined to arbitrarily select one sheet of paper. Describes a method of designing a honeycomb core having the following outer shape.

JP 2001-38832 A ("0004" to "0006") JP 2006-21238 A (“0015” to “0024”)

Kazuya Saito and 1 other, "Development method of honeycomb core with arbitrary cross section", Transactions of the Japan Society of Mechanical Engineers (A), March 2012, 78, 787, p76-p87

(Problems of conventional technology)
In the techniques of Patent Documents 1 and 2, the step of applying an adhesive to the sheet, the step of laminating the sheets, the step of putting the laminate in a heating furnace and hardening the adhesive, etc., the adhesive is solidified The process of spreading the laminated body is necessary, and it is necessary to move to another apparatus between the processes. Therefore, the number of man-hours is large, and a plurality of movement operations between apparatuses are required, which causes a problem of manufacturing time and cost.
The technique described in Non-Patent Document 1 has a problem that it is not industrially automated with respect to the formation of notches and fold lines and the method of folding along the formed fold lines.

  An object of the present invention is to improve the productivity of a honeycomb core having an arbitrary outer shape.

In order to solve the technical problem, the honeycomb core manufacturing apparatus of the invention according to claim 1,
A transport device for transporting the substrate on which the irregularities are formed in the thickness direction in a preset transport direction;
A notch forming device for forming a notch from one and the other in the thickness direction of the base material with respect to the base material,
A bending device that bends the base material in the thickness direction according to the notch formed by the notch forming device;
Control means for controlling the notch forming device based on the shape and position of the notch according to the outer shape of the target honeycomb core to be formed;
It is provided with.

The invention according to claim 2 is the honeycomb core manufacturing apparatus according to claim 1,
A first notch forming device that is supported to be tiltable with respect to the thickness direction of the base material and forms a notch from one side of the base material in the thickness direction of the base material; and in the thickness direction of the base material. A second notch forming device that is supported so as to be tiltable and forms a notch from the other of the base material in the thickness direction of the base material,
It is provided with.

In order to solve the technical problem, the manufacturing method of the honeycomb core of the invention according to claim 3,
A first step of setting the shape and position of the cut formed in the base material with respect to the thickness direction of the base material based on the outer shape of the target honeycomb core to be formed;
Based on the shape and position of the notch set in the first step with respect to the base material that is transported in the transport direction set in advance and has the irregularities formed in the thickness direction. A second step of forming a cut from the thickness direction of the substrate;
A third step of bending the base material from the thickness direction of the base material with respect to the base material in which the cut is formed;
It is characterized by performing.

According to the first and third aspects of the invention, the productivity of the honeycomb core having an arbitrary outer shape can be improved as compared with the case where the configuration of the present invention is not provided.
According to the second aspect of the present invention, it is possible to form notches from both sides by two notch forming devices.

FIG. 1 is an explanatory diagram of a honeycomb core manufacturing apparatus according to Embodiment 1 of the present invention. FIG. 2 is an explanatory view of a main part of the conveying device and the notch forming device constituting the honeycomb core manufacturing apparatus of FIG. FIG. 3 is an explanatory view of a main part of a bending apparatus constituting the honeycomb core manufacturing apparatus of the first embodiment. FIG. 4 is an explanatory diagram of a driving unit in the bending apparatus according to the first embodiment. FIG. 5 is an explanatory view of a basic model of the honeycomb core, FIG. 5A is a developed view, FIG. 5B is an explanatory view in a state where the developed view shown in FIG. 5A is folded into a waveform, and FIG. 5C is a sheet from the state shown in FIG. FIG. 5D is an explanatory view of a state where the honeycomb core is completed by further folding from the state shown in FIG. 5C. FIG. 6 is an explanatory view of a prismatic cell in a honeycomb core, FIG. 6A is an explanatory view of the cell, FIG. 6B is a state where development starts from the state shown in FIG. 6A, and FIG. 6C is a development view of FIG. . FIG. 7 is an explanatory view of an example of a honeycomb core having a modified cross section, FIG. 7A is an overall view, FIG. 7B is an explanatory view of a cell, and FIG. 7C is a view of FIG. FIG. 8 is an explanatory view of a tapered honeycomb core, FIG. 8A is a projection view of a unit cell on the WZ plane, FIG. 8B is a perspective view of the unit cell, and FIG. 8C is a development view of the unit cell shown in FIG. is there. 9 is an explanatory view of a tapered honeycomb core, FIG. 9A is a development view in which unit cells are continuously connected, FIG. 9B is a cross-sectional view of the honeycomb core assembled from the development view of FIG. 9A, and FIG. FIG. 9B is a perspective view of FIG. 9B. FIG. 10 is an explanatory view of a convex honeycomb core, FIG. 10A is a projection view of a unit cell on the WZ plane, FIG. 10B is a perspective view of the unit cell, and FIG. 10C is a development view of the unit cell shown in FIG. is there. FIG. 11 is an explanatory view of a convex honeycomb core, FIG. 11A is a development view in which unit cells are continuously connected, FIG. 11B is a cross-sectional view of the honeycomb core assembled from the development view of FIG. 11A, and FIG. FIG. 11B is a perspective view of FIG. 11B. FIG. 12 is an explanatory diagram of a non-convex honeycomb core, FIG. 12A is a projection view of a unit cell on the WZ plane, FIG. 12B is a perspective view of the unit cell, and FIG. 12C is a development view of the unit cell shown in FIG. It is. FIG. 13 is an explanatory diagram of an approximate non-convex honeycomb core, FIG. 13A is a projection view of a unit cell on the WZ plane, FIG. 13B is a perspective view of the unit cell, and FIG. 13C is a unit cell shown in FIG. FIG. FIG. 14 is an explanatory diagram of an approximate non-convex honeycomb core, FIG. 14A is a development view in which unit cells are continuously connected, and FIG. 14B is a cross-section of the honeycomb core assembled from the development view of FIG. 14A. FIG. 14C is a perspective view of FIG. 14B. FIG. 15 is an explanatory diagram of a numerical sequence representation of the developed view. FIG. 16 is an explanatory diagram of a numerical sequence representation of the core after being three-dimensionalized, FIG. 16A is a perspective view, and FIG. 16B is a cross-sectional view. FIG. 17 is an explanatory diagram of the cross-sectional approximation method, FIG. 17A is an explanatory diagram when the outer shape curve is equally divided for each C / 2, and FIG. 17B is an upper and lower boundary of the outer shape curve shifted by C / 2 for each C. It is explanatory drawing at the time of approximating by equally dividing. FIG. 18 is an explanatory diagram of a honeycomb core created by a cross-sectional approximation method, FIG. 18A is a development view, and FIG. 18B is a perspective view. FIG. 19 is a block diagram illustrating functions provided in the control unit of the computer apparatus according to the first embodiment. FIG. 20 is an explanatory diagram of a method of calculating the tilt angle according to the first embodiment. FIG. 21 is an explanatory diagram of a cutting position that changes in accordance with the inclination angle of the first embodiment. FIG. 22 is an explanatory diagram of the bending operation of the first embodiment, FIG. 22A is an explanatory diagram of a state when the bending operation is started, and FIG. 22B is a second bent portion and a third bent from the state shown in FIG. FIG. 22C is an explanatory view of a state in which bending has further progressed from the state shown in FIG. 22B, and FIG. 22D is a state in which the first bent portion and the first bent portion are shown in FIG. 22C. FIG. 22E is an explanatory diagram of a state in which bending is further advanced from the state shown in FIG. 22D, and FIG. 22F is a third state from the state shown in FIG. 22E. It is explanatory drawing of the state by which the bending part of this moved down and bending was completed. FIG. 23 is an explanatory diagram of the honeycomb core manufacturing apparatus of the second embodiment and corresponds to FIG. 2 of the first embodiment. FIG. 24 is a block diagram illustrating the functions of the control unit of the computer apparatus according to the second embodiment, and corresponds to FIG. 19 according to the first embodiment. FIG. 25 is an explanatory diagram of the method of calculating the tilt angle of Example 2, FIG. 25A is an explanatory diagram of the state before the corrugated sheet is corrugated, FIG. 25B is a plan view of the corrugated sheet, and FIG. FIG. FIG. 26 is an explanatory view of a joining apparatus of the honeycomb core manufacturing apparatus of the third embodiment. FIG. 27 is an explanatory diagram of the joining device of the third embodiment, FIG. 27A is a diagram corresponding to FIG. 22F of the first embodiment, and FIG. 27B is an explanatory diagram of a state in which the joining device has moved from the state shown in FIG. FIG. 27C is an explanatory diagram of a state in which the joining device is operated and performing joining from the state shown in FIG. 27B, and FIG. 27D is an explanatory diagram of a state in which the joining device has moved to the standby position. FIG. 28 is a block diagram illustrating the functions of the control unit of the computer apparatus according to the third embodiment, and corresponds to FIG. 19 according to the first embodiment. FIG. 29 is an explanatory diagram of a honeycomb core of Example 4, FIG. 29A is an explanatory diagram of a corrugated sheet before folding, and FIG. 29B is an explanatory diagram of a honeycomb core after folding. 30 is an explanatory diagram when a force is applied to the honeycomb core, FIG. 30A is an explanatory diagram for the honeycomb core of Example 1, and FIG. 30B is an explanatory diagram of the honeycomb core of Example 4. FIG. 31 is an explanatory view of a modified example of Example 4, FIG. 31A is an explanatory view of a corrugated sheet before folding, and FIG. 31B is an explanatory view of a honeycomb core after bending.

Next, examples which are specific examples of embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.
In the following description using the drawings, illustrations other than members necessary for the description are omitted as appropriate for easy understanding.

FIG. 1 is an explanatory diagram of a honeycomb core manufacturing apparatus according to Embodiment 1 of the present invention.
FIG. 2 is an explanatory view of a main part of the conveying device and the notch forming device constituting the honeycomb core manufacturing apparatus of FIG.
In FIG. 1, the manufacturing apparatus 1 of the honeycomb core of Example 1 of this invention has the support stand 3 which supports the corrugated sheet 2 as an example of a base material. The corrugated sheet 2 of Example 1 has periodic irregularities formed in advance in the thickness direction. In FIG. 2, the corrugated sheet 2 of Example 1 has a flat bottom surface portion 2 a that extends in the left-right direction that is the conveying direction of the corrugated sheet 2 along the upper surface of the support 3. The bottom surface portion 2 a is arranged with a predetermined interval with respect to the width direction of the corrugated sheet 2. On the rear side of each bottom surface portion 2a (the back side in FIG. 2), a belt-shaped front inclined surface portion 2b that is inclined upward and extends in the left-right direction is formed. On the rear side of each front inclined surface portion 2b, a strip-shaped top surface portion 2c is formed which is arranged in parallel to the bottom surface portion 2a and extends in the left-right direction. On the rear side of the top surface portion 2c, there is formed a belt-like rear inclined surface portion 2d extending obliquely downward toward the bottom surface portion 2a and extending in the left-right direction. In Example 1, the front-side inclined surface portion 2b, the top surface portion 2c, and the rear-side inclined surface portion 2d form an isosceles trapezoidal convex portion that swells upward with respect to the bottom surface portion 2a. In other words, an isosceles trapezoidal concave portion that swells downward is formed with respect to the top surface portion 2c by the rear inclined surface portion 2d, the bottom surface portion 2a, and the front inclined surface portion 2b.

1 and 2, a transport device 11 is disposed at the center of the support 3. The conveyance device 11 according to the first embodiment includes a conveyance roller 12 that contacts the corrugated sheet 2 and conveys the sheet downstream. A plurality of conveying rollers 12 according to the first embodiment are arranged on the shaft 13 in correspondence with the flat portion 2 a of the corrugated sheet 2. A first pulley 14 as an example of a driven member is supported at the front end of the shaft 13.
Below the first pulley 14, a second pulley 15 as an example of a drive member is disposed. A belt 16 as an example of a drive transmission member is mounted between the pulleys 14 and 15. Drive is transmitted to the second pulley 15 from a conveyance motor as an example of a drive source (not shown).

The 1st cutter 21 as an example of the 1st notch formation apparatus is arrange | positioned in the downstream of the conveying apparatus 11 with respect to the conveyance direction of the corrugated sheet 2. The 1st cutter 21 of Example 1 is arranged above as one example of the thickness direction of corrugated sheet 2.
The first cutter 21 has a pair of front and rear support arms 22 as an example of a rotation support portion. As an example of a rotating body, a disk-shaped first rotating holder 23 is rotatably supported on each support arm 22. A gear portion 23 a as an example of a gear portion is formed on the outer peripheral surface of the first rotating holder 23. A first inclined gear 24 as an example of a first inclination gear meshes with the gear portion 23a. Drive is transmitted to the first tilt gear 24 from a first tilt motor as an example of a drive source (not shown). Therefore, the first rotation holder 23 can rotate according to the forward rotation and the reverse rotation of the first tilt motor.

The first rotation holder 23 is formed with a guide slit 26 that passes through the center of rotation and extends in the radial direction as an example of a guide portion. A first cutter body 27 as an example of a notch forming member is supported by the guide slit 26 so as to be movable along the guide slit 26. The 1st cutter main body 27 is formed in thin plate shape, and when the pointed part of a lower end contacts the corrugated sheet 2, it is comprised so that a notch can be formed in the corrugated sheet 2. FIG.
The first cutter body 27 is formed with first rack teeth 27a as an example of a flat gear portion. The rack teeth 27a mesh with a first pinion gear 28 as an example of an elevating gear. Drive is transmitted to the first pinion gear 28 from a first elevating motor 29 as an example of a drive source. The first pinion gear 28 and the first lifting / lowering motor 29 are supported by the first rotating holder 23. Therefore, the first cutter body 27 can move along the guide slit 26 according to the forward and reverse rotations of the first lifting motor 29.

  Therefore, the first cutter 21 rotates the first tilting motor and adjusts the rotational position of the first rotating holder 23 to operate the first lifting / lowering motor 29, so that the corrugated sheet 2 is moved. , Contact from above to form a cut from above. In addition, the 1st cutter 21 of Example 1 controls the rotation amount of the 1st inclination motor 29 according to the rotation position of a 1st rotation holder, The top surface part 2c of the corrugated sheet 2, the inclined surface part 2b, The corrugated sheet 2 is cut from above without cutting the bottom 2d and cutting the bottom 2a.

The 2nd cutter 31 as an example of the 2nd notch formation apparatus is arrange | positioned in the downstream of the 1st cutter 21 with respect to the conveyance direction of the corrugated sheet 2.
Unlike the 1st cutter 21, the 2nd cutter 31 is arrange | positioned under the other example of the thickness direction of the corrugated sheet 2 below. Accordingly, the second cutter 31 has a support arm 32 having a shape different from that of the support arm 22 of the first cutter 21. Other than that, the second cutter 31 is configured in the same manner as the first cutter 21, and includes a second rotating holder 33, a second inclined gear 34, a guide slit 36, a second cutter body 37, and a second pinion gear 38. The second elevating motor 39 is provided.
The first cutter 21 and the second cutter 31 constitute the notch forming device 21 + 31 of the first embodiment.

FIG. 3 is an explanatory view of a main part of a bending apparatus constituting the honeycomb core manufacturing apparatus of the first embodiment.
1 and 3, a folding device 41 is disposed on the downstream side of the second cutter 31 with respect to the conveyance direction of the corrugated sheet 2. The folding device 41 according to the first embodiment includes a horizontal guide 42 disposed on the upstream side with respect to the conveyance direction of the corrugated sheet 2 as an example of a first guide member. A pair of horizontal guides 42 are disposed on both sides of the corrugated sheet 2 in the width direction. The horizontal guide 42 has a first groove portion 42a extending along the transport direction.
A first bent portion 43 extending in the width direction of the corrugated sheet 2 is supported by the first groove portion 42a. The first bent portion 43 is formed in a thin rod shape and is supported so as to be movable along the first groove portion 42a. Moreover, the 1st bending part 43 is arrange | positioned so that the upper surface of the corrugated sheet 2 can contact.

Fan-shaped connecting members 44 are supported at both front and rear ends of the first bent portion 43. The connecting member 44 is supported so as to be rotatable integrally with the first bent portion 43 around the first bent portion 43.
The connection member 44 supports a rotation guide 46 as an example of a second guide member extending along the radial direction with the first bent portion 43 as the center. The rotation guide 46 is formed with a second groove 46a extending along the radial direction.
A second bent portion 47 is supported by the second groove portion 46a. The second bent portion 47 is formed in a thin rod shape and is supported so as to be movable along the second groove portion 46a. Moreover, the 2nd bending part 47 is arrange | positioned so that the lower surface of the corrugated sheet 2 can contact.

As an example of a third guide member, an upper and lower guide 48 extending in the vertical direction is disposed on the downstream side of the horizontal guide 42 with respect to the conveyance direction of the corrugated sheet 2. The vertical guide 48 is formed with a third groove 48a extending in the vertical direction. A third bent portion 49 is supported by the third groove portion 48a.
The third bent portion 49 is formed in a thin rod shape, and is supported so as to be movable along the third groove portion 48a. Moreover, the 3rd bending part 49 is arrange | positioned so that the upper surface of the corrugated sheet 2 can contact.

FIG. 4 is an explanatory diagram of a driving unit in the bending apparatus according to the first embodiment.
3 and 4, a first slider 51 as an example of a first drive unit is supported on the front side of the first bent portion 43 on the rear side of the connecting member 44. The first slider 51 has a main body 51a. The main body 51 a is formed in a plate shape that contacts the front surface of the horizontal guide 42. Side plate portions 51b extending rearward are formed at both ends of the main body portion 51a. As an example of a rotating member, a roller 51c that contacts the rear surface of the horizontal guide 42 is rotatably supported on the side plate portion 51b. A gear 51e as an example of a driven gear is supported on the outer end portion of the rotating shaft 51d of one roller 51c. The side plate portion 51b supports a motor unit 51f as an example of a drive system. The motor unit 51f includes a motor 51g as an example of a drive source, and a gear 51h that transmits driving from the motor 51g and meshes with the gear 51e.
Therefore, by rotating the motor 51g forward and backward, the roller 51c rotates and the first slider 51 can move along the horizontal guide 42.

Further, a driving unit 52 for rotation is supported on the front end portion of the first bent portion 43. The drive unit 52 for rotation has a gear 52a as an example of a gear for rotation. The gear 52 a is supported at the front end of the first bent portion 43 on the front side of the connecting member 44. The connecting member 44 supports a rotation motor unit 52b as an example of a drive system. Similarly to the motor unit 51f, the motor unit 52b includes a motor 52c and a gear 52d that receives driving from the motor 52c and meshes with the gear 52a to transmit driving.
The second bent portion 47 supports a second slider 53, and the third bent portion 49 supports a third slider 54 as an example of a third drive unit. The sliders 53 and 54 are configured in the same manner as the first slider 51, and thus detailed description thereof is omitted.
The second slider 53 and the rotation driving unit 52 constitute a second driving unit 52 + 53 of the first embodiment that moves the second bent portion 47.

  In FIG. 1, the honeycomb core manufacturing apparatus 1 of Example 1 includes a computer device 61 as an example of a control device. The computer device 61 is electrically connected to the transport device 11, the first cutter 21, the second cutter 31, and the bending device 41, and controls each device 11, 21, 31, 41. The computer device 61 according to the first embodiment includes, as an example, a commercially available personal computer, a device main body 62, a keyboard 63 and a mouse 64 as an example of an input device, a display 66 as an example of a display device, Have

(Theoretical explanation of how to make honeycomb core)
Next, before explaining the control of the honeycomb core manufacturing apparatus 1 of the first embodiment, a theoretical explanation of a honeycomb core manufacturing method necessary as a premise of the explanation of the control will be given.
(Basic model)
FIG. 5 is an explanatory view of a basic model of the honeycomb core, FIG. 5A is a developed view, FIG. 5B is an explanatory view in a state where the developed view shown in FIG. 5A is folded into a waveform, and FIG. FIG. 5D is an explanatory view of a state where the honeycomb core is completed by further folding from the state shown in FIG. 5C.
In FIG. 5A, in the basic model, slits 102 indicated by thick lines are alternately introduced into the sheet 101, and folding lines 103 and 104 perpendicular thereto are put in parallel. Here, the mountain fold line 103 is indicated by a solid line, and the valley fold line 104 is indicated by a broken line. 5A, when the direction of the slit 102 is the l direction and the direction of the fold lines 103 and 104 perpendicular thereto is the w direction, the flat plate is corrugated (wavy) as shown in FIG. 5B with the fold lines 103 and 104 in the w direction. As shown in FIG. 5C, the honeycomb core 106 having hexagonal cells is obtained as shown in FIG. 5D by bending in a zigzag manner while opening the slits 102 at the folding lines 103 and 104 in the l direction. The W, L, and Z directions of the honeycomb core 106 after three-dimensionalization are determined as shown in FIG.

(Deformed cross-section model)
(Unit cell)
FIG. 6 is an explanatory view of a prismatic cell in a honeycomb core, FIG. 6A is an explanatory view of the cell, FIG. 6B is a state where development starts from the state shown in FIG. 6A, and FIG. 6C is a development view of FIG. .
In the following description, the unit shown in FIG. In the case of the basic model, the development view of the unit cell has a configuration in which rectangles are arranged in 5 rows × 2 columns as shown in FIG. 6C. Therefore, the vertexes of each rectangle of 5 rows and 2 columns are defined as AP and I ′, J ′, M ′, and N ′ from the correspondence before and after the three-dimensionalization.
In FIG. 6, when the cell size is C, the interval between the broken lines parallel to the w direction in the developed view is c ′, and the honeycomb characteristic angle is θ, the following equation (1) is established.
c '= C / (2cosθ) ... Formula (1)

FIG. 7 is an explanatory view of an example of a honeycomb core having a modified cross section, FIG. 7A is an overall view, FIG. 7B is an explanatory view of a cell, and FIG. 7C is a view of FIG.
In FIG. 7, as a panel 121 having an irregular cross section, the thickness and curvature of the panel change only along the W direction, and a constant honeycomb core is considered in the L direction. Also, like the basic model, all surfaces are perpendicular to the LW plane, and the cross section in the Z-axis direction of each cell is always a regular hexagon.
Considering the unit structure as shown in FIG. 7B from the periodicity, the apexes A to P are determined as in the basic model. Points D *, E *, G *, L *, M *, and O * are points obtained by projecting the vertices D, E, G, L, M, and O on the unit cell onto the WZ plane.

Due to symmetry, quadrilateral EDLM and BCKJ, GEMO and HBJP are congruent. Further, in the honeycomb core, the width X _L and the number of cells N _{L in the L} direction, and the width X _W and the number of cells N _W in the W direction are respectively determined as shown in FIG. 7C.
The angles (∠E * D * L *, ∠G * E * M *) that the rectangles BCDE and BEGH at the top of the cell make with the LZ plane are α ₁ and α ₂ respectively, and the angles that the rectangles KLMJ and JMOP at the bottom make with the LZ plane Let (∠D * L * M *, ∠E * M * O *) be β ₁ and β ₂ , respectively.
Here, if DL EDL = α ₁ ', ∠ GEM = α ₂ ', ∠ MLD = β ₁ ', and ∠OME = β ₂ ', the quadrilateral GEMO and EDLM are inclined by θ with respect to the ZW plane. The following equations (2) and (3) are established.
tan α _n '= cosθ · tan α _n (n = 1,2) ... Formula (2)
tan β _n '= cosθ tan β _n (n = 1,2) (3)
In the following, the shape of the unit cell is classified into a tapered shape, a convex shape, and a non-convex shape, and the shape of the slit is scrutinized by virtually expanding it on a plane, and the condition of the cross section that can be manufactured is clarified.

(Tapered honeycomb core)
FIG. 8 is an explanatory view of a tapered honeycomb core, FIG. 8A is a projection view of a unit cell on the WZ plane, FIG. 8B is a perspective view of the unit cell, and FIG. 8C is a development view of the unit cell shown in FIG. is there.
9 is an explanatory view of a tapered honeycomb core, FIG. 9A is a development view in which unit cells are continuously connected, FIG. 9B is a cross-sectional view of the honeycomb core assembled from the development view of FIG. 9A, and FIG. FIG. 9B is a perspective view of FIG. 9B.
In FIG. 8, a tapered honeycomb core whose thickness varies at a constant rate along the W direction is considered. If α ₁ = α ₂ = α, β ₁ = β ₂ = β in the unit cell, the development shown in FIG. 8C is obtained.
At this time, since α ₁ ′ = α ₂ ′ is established from the equations (2) and (3), the edges BHGE and BCDE coincide on the development view, and the slit 102 becomes a bent line segment. A development view of the tapered honeycomb core manufactured by continuously connecting the unit cells 111 of this type has a configuration shown in FIG. 9A, a sectional view thereof becomes FIG. 9B, and a perspective view thereof has a configuration shown in FIG. 9C.

(Convex honeycomb core)
FIG. 10 is an explanatory view of a convex honeycomb core, FIG. 10A is a projection view of a unit cell on the WZ plane, FIG. 10B is a perspective view of the unit cell, and FIG. 10C is a development view of the unit cell shown in FIG. is there.
FIG. 11 is an explanatory view of a convex honeycomb core, FIG. 11A is a development view in which unit cells are continuously connected, FIG. 11B is a cross-sectional view of the honeycomb core assembled from the development view of FIG. 11A, and FIG. FIG. 11B is a perspective view of FIG. 11B.
In FIG. 10, when α ₁ > α ₂ and β ₁ > β ₂ , the cross section of the unit cell has a convex shape bulging outward. The unit cell 111 in this case has the configuration shown in FIG. 10B, and the developed view has the configuration shown in FIG. 10C.
10A to 10C, since α ₁ ′> α ₂ ′, a gap is formed between the edges BHGE and BCDE, and the slit is a non-convex hexagonal cutout. FIG. 11 shows an example of a convex curved core manufactured by continuously connecting such unit cells. Here, in the honeycomb core 106 shown in FIG. 11, the upper and lower curves of the cross section are equally divided for each C / 2 and approximated as 16 trapezoids.

(Non-convex honeycomb core)
FIG. 12 is an explanatory diagram of a non-convex honeycomb core, FIG. 12A is a projection view of a unit cell on the WZ plane, FIG. 12B is a perspective view of the unit cell, and FIG. 12C is a development view of the unit cell shown in FIG. It is.
FIG. 13 is an explanatory diagram of an approximate non-convex honeycomb core, FIG. 13A is a projection view of a unit cell on the WZ plane, FIG. 13B is a perspective view of the unit cell, and FIG. 13C is a unit cell shown in FIG. FIG.
FIG. 14 is an explanatory diagram of an approximate non-convex honeycomb core, FIG. 14A is a development view in which unit cells are continuously connected, and FIG. 14B is a cross-section of the honeycomb core assembled from the development view of FIG. 14A. FIG. 14C is a perspective view of FIG. 14B.

12A and 12B, in the case of the unit cell 11 having a non-convex cross section of α ₁ <α ₂ , β ₁ <β ₂ , when developed as shown in FIG. 6 around AB and EF, α ₁ ′ < Since the sum of the angles gathered at point E from α ₂ ′ exceeds 2π, the portion indicated by the hatched portion in FIG. 12C overlaps on the plane.
That is, since the unit cell 111 having the shape shown in FIG. 12 must be manufactured by joining two pieces of paper with AB and EF, it cannot be three-dimensionalized from one piece of paper. Therefore, when a unit cell is manufactured from one sheet of paper, it is necessary that α ₁ ≧ α ₂ always at the slit-side end face BCDEGH.

However, when producing a non-convex curved core, it is not practical to produce a development view from two or more pieces of paper. Therefore, it is considered to produce a non-convex section approximately by combining with a tapered unit cell.
In FIG. 12, paying attention to the other end face of the hexagonal column, it can be seen that the end face JKLMOP is formed by combining two pieces of paper, and therefore a non-convex cross section (β ₁ <β ₂ ) can be realized. Therefore, as shown in FIG. 13, a unit cell 111 in which α ₁ = α ₂ and β ₁ <β ₂ is considered, and the unit cells 111 are repeatedly connected while being inverted up and down, whereby non-convex shapes are formed on both the upper and lower surfaces. The curved surface can be formed. An example of such a non-convex honeycomb core is shown in FIG.
In this model, the cross section is approximated by 14 trapezoids, but the curvature of the surface of the panel 106 changes only at one end face of each cell 111 (black dot in FIG. 14B). For this reason, the upper and lower curves of the cross section are equally divided for each cell size C 2, which is an approximation that is twice as rough as that of the convex curved honeycomb in FIG.

(Development method design)
(Development drawing, cross-section number sequence representation)
FIG. 15 is an explanatory diagram of a numerical sequence representation of the developed view.
Based on the above description, a development design method for producing an arbitrary cross section in a 3D honeycomb core as shown in FIG. 7 and the like is generalized. First, in order to mathematically express the developed view, a number sequence representing the positions of the broken lines 103 and 104 and the slit 102 is defined.
A band-like region as shown in FIG. 15 is cut out from the developed view from the periodicity and symmetry, and the origin and coordinate axes l and w are determined. Focusing on the region of c '<l <2c', apexes A0, A1, A2, ..., B0, B1, B2, ... are determined in order from the right end, and the respective w coordinates are set to a ₀ , a ₁ , a ₂ , ..., b ₀ , b ₁ , b ₂ , ..., A _3m , B _{3m + 1} are broken lines, A _{3m + 1} , B _3m are the left end of the slit, A _{3m + 2} , B _{3m -1} is located at the right end of the slit (m = 1, 2, 3,...).

In order to draw a development view of the honeycomb having an arbitrary cross section, these sequence ai, bi and the width c ′ of the broken line in the l direction (determined by the cell size) are required. Since the quadrangular shapes (rectangles ABJI and ABJ'I ', EFNM and EFN'M' in the unit cell) that are pasted after the three-dimensionalization are congruent, if m = 1,2,3 ... The following formulas (4) and (5) hold.
a _{3m + 1} −a _3m = a _3m −a _3m−1 = l _2m Equation (4)
b _3m-1 -b _3m-2 = b _3m-2 -b _3m-3 = l _2m-1 Equation (5)

Here, l _i is equal to the height of the cell wall after three-dimensionalization (l ₀ = a ₁ −a ₀ ).
Further, the slit width s _i is defined as in the following formulas (6) to (8).
s ₀ = b ₀ −a ₀ (Formula 6)
s _2m = b _3m -b _3m-1 Equation (7)
s _2m-1 = a _3m-1 -a _3m-2 Equation (8)
Considering that a _i is represented by these s _i and l _i , the following equation (9) is established from FIG.

FIG. 16 is an explanatory diagram of a numerical sequence representation of the core after being three-dimensionalized, FIG. 16A is a perspective view, and FIG. 16B is a cross-sectional view.
Next, a number sequence representing the cross-sectional shape after three-dimensionalization is defined. FIG. 16 shows how the vertices Ai and Bi are arranged in the LWZ space after the paper piece of FIG. 15 is three-dimensionalized.
Here, T0, T1, T2, ... are points indicating the upper boundary when the cross-section is projected onto the WZ plane, and U0, U1, U2, ... are defined as the points indicating the lower boundary. Let Z coordinates be t ₀ , t ₁ , t ₂ ,..., U ₀ , u ₁ , u ₂ ,.
Due to the periodicity, the upper and lower boundaries are curves whose slope changes every C / 2, and the WZ coordinates of the respective vertices are expressed by the following equations (10) and (11).
Ti: (iC / 2, ti) ... Formula (10)
Ui: (iC / 2, ui) ... Formula (11)

(Calculation method of development sequence)
Consider obtaining several sequences ai and bi for drawing a development view based on the sequences ti and ui as the cross-sectional shape of the honeycomb core.
First, in the LWZ coordinate system after the three-dimensionalization, when the Z coordinates of the points Ai and Bi are expressed as {Ai} z and {Bi} z, the following equations (12) and (13) hold from the periodicity (FIG. 16). reference).
{A _3m } z = u _2m , {A _{3m + 1} } z = t _2m , {A _{3m + 2} } z = t _{2m + 2} (12)
{B _3m } z = u _{2m + 1} , {B _{3m + 1} } z = t _{2m + 1} , {B _{3m + 2} } z = u _{2m + 1} (13)
Here, the following equations (14) and (15) hold for the cell wall height li.
l _2m = {A _{3m + 1} } z− {A _3m } z = t _2m −u _2m Equation (14)
l _{2m + 1} = {B _{3m + 1} } z− {B _3m } z = t _{2m + 1} −u _{2m + 1} Equation (15)

When attention is paid to the trapezoid B _{3m + 1} A _{3m + 1} A _3m B _3m shown in bold lines in FIG. 16, the Z direction after the three-dimensionalization coincides with the w direction on the development view. ) And (17) hold.
u _{2m + 1} −u _2m = {B _3m } z− {A _3m } z = b _3m −a _3m Equation (16)
t _{2m + 1} −t _2m = {B _{3m + 1} } z− {A _{3m + 1} } z = b _{3m + 1} −a _{3m + 1} Equation (17)
Similarly, focusing on the squares A _{3m + 2} B _{3m + 1} B _{3m + 2} A _{3m + 3} , A _3m-1 B _3m-2 B _3m-1 A _3m , the Z direction corresponds to the −w direction, The following formulas (18) and (19) hold.
t _{2m + 2} −t _{2m + 1} = {A _{3m + 2} } z− {B _{3m + 1} } z = −a _{3m + 2} + b _{3m + 1} Equation (18)
u _2m −u _2m−1 = {A _3m } z− {B _3m−1 } z = −a _3m + b _3m−1 Equation (19)

Here, from the equations (14) and (15), the following equation (20) is established.
Li = ti−ui (20)
Further, from the equations (7), (16), (19), the following equation (21) is established.
s _2m = u _{2m + 1} + u _2m-1 −2u _2m Equation (21)
Further, from the equations (8), (17), (18), the following equation (22) is established.
s _{2m + 1} = 2t _{2m + 1} −t _2m −t _{2m + 2} Equation (22)
Therefore, a _3m can be expressed by the following equations (23) by ti, ui from equations (9), (20), (22).

From the expression (23), the following expressions (24) and (25) are established with respect to a _{3m + 1} and a _3m-1 .

Furthermore, with respect to bi, the following equation (26) is established from the equations (16) and (23).

Further, from the formula (26), the following formulas (27) and (28) are established.

From the above, it was possible to represent all the sequence numbers ai and bi by the sequence numbers ti and ui. By using the equations (23) to (28), it is possible to obtain a sequence of numbers ai and bi for drawing a development view for a given cross-sectional shape ti and ui.
However, as shown in the example of FIG. 12, in the case of a shape including a unit cell whose both ends of the cross section are non-convex, the slits are overlapped, making it impossible to manufacture from one sheet. turn into. This means that ai> ai + 1, bi> bi + 1, that is, a slit of si <0 occurs in the sequence diagram of the development.

In order to always satisfy si ≧ 0 on the developed view, the following expressions (29) and (30) need to be satisfied from the expressions (21) and (22).
u _{2m + 1} −u _2m ≧ u _2m −u _2m−1 Expression (29)
t _{2m + 1} −t _2m ≧ t _{2m + 2} −t _{2m + 1} Equation (30)
Therefore, when the curves T0T1T2... TN are convex upward and U0U1U2... UN are convex downward, the equations (29) and (30) are always satisfied, so that the convex cross section as shown in FIGS. It is always confirmed that the slit is zero or more.

(Cross section approximation method)
FIG. 17 is an explanatory diagram of the cross-sectional approximation method, FIG. 17A is an explanatory diagram when the outer shape curve is equally divided for each C / 2, and FIG. 17B is an upper and lower boundary of the outer shape curve shifted by C / 2 for each C. It is explanatory drawing at the time of approximating by equally dividing.
On the WZ plane, given two curves Z = f (W), Z = g (W) where f (W)> g (W) (0 <W <XW), along these curves Consider designing a development view of a honeycomb core of cell size C with a curved cross section.

As shown in FIG. 17A, the most efficient method of approximating the cross section is a method of equally dividing every C / 2 by setting ti = f (iC / 2) and ui = g (iC / 2).
However, the slit width is always positive in this method only when Expressions (29) and (30) are satisfied. Therefore, in order to cope with a more general case, the following method is adopted.
First, with respect to a given curve, the even number in the section number sequence ti and the odd number in the ui are determined as in the following equations (31) and (32).
t _2m = f (m C) Equation (31)
u _{2m + 1} = g ((2m + 1) C / 2) Equation (32)
Here, the remaining number sequences t _{2m + 1} and u _2m are placed as in the following equations (33) and (34).
t _{2m + 1} = (t _2m + t _{2m + 2} ) / 2 Equation (33)
u _2m = (u _2m-1 + u _{2m + 1} ) / 2 Formula (34)

From equations (21) and (22), s _2m = 0 and s _{2m + 1} = 0 always hold.
This cross-sectional approximation method is shown in FIG. 17B. Here, the upper and lower boundaries are shifted by C / 2, and the cell size C is divided and approximated at equal intervals. Expressions (33) and (34) mean that the points T _{2m + 1} and U _2m are corrected to the midpoints T ′ _{2m + 1} and U ′ _{2m of the} previous and subsequent points, respectively.

FIG. 18 is an explanatory diagram of a honeycomb core created by a cross-sectional approximation method, FIG. 18A is a development view, and FIG. 18B is a perspective view.
In FIG. 18, the honeycomb core shown in FIG. 18 can be created by using the method shown in FIG. 17 to determine ti, ui for the cross section composed of a parabola and a sine curve, and calculate and design ai, bi.

(Explanation of control part)
FIG. 19 is a block diagram illustrating functions provided in the control unit of the computer apparatus according to the first embodiment.
In FIG. 19, the device main body 62 of the computer device 61 has an input / output interface I / O for inputting / outputting signals to / from the outside. In addition, the control unit C includes a ROM (read only memory) in which a program for performing necessary processing, information, and the like are stored. In addition, the control unit C includes a random access memory (RAM) for temporarily storing necessary data. The control unit C includes a central processing unit (CPU) that performs processing according to a program stored in a ROM or the like. Therefore, the computer device 61 according to the first embodiment is configured by an information processing device, a so-called computer. Therefore, the computer device 61 can realize various functions by executing programs stored in the ROM or the like.

(Signal output element connected to the device main body 62)
The apparatus main body 62 is supplied with output signals from signal output elements such as a keyboard 63 and a mouse 64.

(Controlled element connected to the device main body 62)
The apparatus body 62 includes a display 66, a motor control circuit D1 for conveyance, a motor control circuit D2 for first cutting, a motor control circuit D3 for second cutting, a motor control circuit D4 for bending, and the like. Connected to a control element (not shown). The device main body 62 outputs control signals to the display 66, the circuits D1 to D4, and the like.
66: Display The display 66 displays an image based on the image signal transmitted from the apparatus main body 62.
D1: Transport Motor Control Circuit The transport motor control circuit D1 drives the transport roller 12 via the transport motor M1.

D2: First cutting motor control circuit The first cutting motor control circuit D2 moves the first cutter 21 via the first tilt motor M2a and the first lifting motor M2b.
D3: Second cutting motor control circuit The second cutting motor control circuit D3 moves the second cutter 31 via the second inclination motor M3a and the second lifting motor M3b.
D4: Bending motor control circuit The bending motor control circuit D4 moves the bending portions 43, 47, and 49 via the bending motors 51g, 52c, 53g, and 54g.

(Function of the apparatus main body 62)
The apparatus main body 62 has a function of executing a process according to an input signal from the signal output element and outputting a control signal to each control element. That is, the apparatus main body 62 has the following functions.
C1: Outline Information Storage Unit The outline information storage unit C1 stores the outline information of the honeycomb core to be created. The external shape information storage means C1 of the first embodiment is inputted and stored in the computer device 61 via a storage medium such as a keyboard 63, a CD-ROM, or a USB memory. In the first embodiment, the data of the above-described cross-section sequence ti, ui is stored as an example of outline information. The outline information is not limited to the cross-section sequence ti, ui. For example, f (W) and g (W) that are functions for specifying the outline shape can be adopted, and other outline shapes can be specified. Any type of data can be used.
In the outer shape information storage unit of the first embodiment, known data determined by the corrugated sheet 2 to be used, such as the cell wall width c ′ and the honeycomb core characteristic angle θ, is also stored in advance.

C2: Cutting Position Calculation Unit The cutting position calculation unit C2 calculates a cutting position at which the cutters 21 and 31 make a cut based on the outer shape data stored in the outer shape information storage unit C1. The notch position calculation means C2 according to the first embodiment calculates the coordinates ai and bi of each vertex based on the data of the cross-section sequence ti and ui. Specifically, the coordinates ai and bi of each vertex are calculated using Expressions (23) to (28). In the first embodiment, the coordinates of the cutting position are strictly a _{3m + 1} , a _{3m + 2} , b _3m , and b _{3m + 2} of ai and bi, but are the positions to be bent. a _3m and b _{3m + 1} are also calculated. Moreover, when deriving the sequence of cross sections, it is possible to use the cross section approximation method of Expressions (31) to (34).

FIG. 20 is an explanatory diagram of a method of calculating the tilt angle according to the first embodiment.
C3: Inclination Angle Calculation Unit The inclination angle calculation unit C3 calculates the inclination angle of each cutter 21 and 31 based on the outer shape data stored in the outer shape information storage unit C1. Inclination angle calculation means C3 according to the first embodiment calculates inclination angles αn and βn based on coordinates ai and bi calculated from the data of cross-section sequence ti and ui (n = 0, 1, 2, 3). , ..., 3m, 3m + 1,3m + 2, ...). In Figure 20, the tilt angle is calculated, the coordinates _{a 1, a 2, a 4} , a 5, ..., a 3m + 1, a 3m + 2, ... and a point, b _2, b _3, b ₅ , b ₆ ,..., b _{3m + 2} , b _{3m + 3,.}

Thus, from FIG. 20, the inclination angle alpha _{3m + 1} in a _{3m + 1,} the following equation (35) holds.
tan (π−α _{3m + 1} ) = (c / 2) / (a _{3m + 1} −b _{3m + 1} ) (35)
Therefore, α _{3m + 1} is calculated by the following equation (36).
α _{3m + 1} = tan ⁻¹ [(c′cos θ) / (b _{3m + 1} −a _{3m + 1} )] (36)
Similarly, α _{3m + 2} , β _{3m + 2} , and β _{3m + 3} are calculated by the following equations (37) to (39).
α _{3m + 2} = tan ⁻¹ [(c′cos θ) / (b _{3m + 1} −a _{3m + 2} )] (37)
β _{3m + 2} = tan ⁻¹ [(c′cosθ) / (b _{3m + 2} −a _{3m + 3} )] Equation (38)
β _{3m + 3} = tan ⁻¹ [(c′cos θ) / (b _{3m + 3} −a _{3m + 3} )] Equation (39)

C4: Transport Control Unit The transport control unit C4 controls the transport roller 12 via a transport motor control circuit D1. The conveyance control unit C4 according to the first embodiment controls the conveyance roller 12 to rotate and stop, thereby controlling conveyance of the corrugated sheet 2 to the downstream side and conveyance stop. The conveyance control means C4 of the first embodiment includes the coordinates ai, bi calculated by the cutting position calculation means C2 and the inclination angles α _{3m + 1} , α _{3m + 2} , β calculated by the inclination angle calculation means C3. _{Based on 3m + 2} , β _{3m + 3 and the} like, the driving and stopping of the conveying roller 12 are controlled.
Specifically, when the coordinates a ₁ , a ₂ , a ₄ , a ₅ ,..., A _{3m + 1} , a _{3m + 2} ,. The driving of the roller 12 is stopped. Also, when the coordinates b ₂ , b ₃ , b ₅ , b ₆ ,..., B _{3m + 2} , b _{3m + 3} ,. Stop driving. Further, when the coordinates a ₃ , a ₆ , a ₉ ,..., A _3m ,... Reach the position of the third bent portion 49, the driving of the transport roller 12 is stopped. And when the operation | work which cuts with the cutters 21 and 31 is completed, or when bending is completed, when conveying the corrugated sheet 2 to the downstream side at the time of bending, the conveyance roller 12 is driven and the corrugated sheet 2 is driven. Transport downstream.

FIG. 21 is an explanatory diagram of a cutting position that changes in accordance with the inclination angle of the first embodiment.
In FIG. 21, when the moving direction of the first cutter 21 is perpendicular to the surface of the corrugated sheet 2, that is, the position 201 when the inclination angle is 90 ° is set as the coordinate origin, the second cutter 31 is moved from the coordinate origin 201. Let L1 be the distance to the position 202 when the inclination angle is 90 °. At this time, in a state where the front end of the corrugated sheet 2 (the point of the coordinate a ₀ ) is located at the coordinate origin 201, the value of ai is the distance to the coordinate origin 201 for the coordinate ai, + L1 is the distance to the position 202.
When the inclination angle is α _n, the position where the first cutter 21 cuts is shifted along the conveyance direction of the corrugated sheet 2 with respect to the case where the inclination angle is 90 °. The deviation amount L2 is expressed by the following formula (40) from FIG. 21 when the distance from the rotation center of the first cutter 21 to the surface of the corrugated sheet 2 is r1.
L2 = −r1 / (tan α _n ) Equation (40)

Similarly, the shift amount L2 ′ of the second cutter 31 is expressed by the following equation (41).
L2 ′ = − r1 ′ / (tan β _n ) (41)
In the first embodiment, r1 = r1 ′ is set.
Therefore, the position where the first cutter 21 is cut is a position where the front end of the corrugated sheet 2 is conveyed downstream by ai + L2 from the state where the front end of the corrugated sheet 2 is located at the coordinate origin 201. The insertion position is a position conveyed to the downstream side by bi + L1 + L2.

Further, in the conveyance control unit C4 according to the first embodiment, the conveyance roller 12 is stopped every time the coordinate a _3m reaches the third bent portion 49. That is, when the distance from the coordinate origin 201 to the position of the third bent portion 49 is L3 along the conveyance direction of the corrugated sheet 2, from the state where the front end of the corrugated sheet 2 is located at the coordinate origin 201, the coordinate a _When the position of _{3 m} moves to the downstream side by a _3m + L3, the transport roller 12 is stopped.
Further, the conveyance control means C4 according to the first embodiment is configured such that the point of the coordinate a _{3m + 3} is L3- (a _{3m + 3} − with respect to the cell size C and the coordinate origin 201 when the bending process described later is performed. The conveying roller 12 is driven until it moves from the position _a3m ) (stop position at the start of folding) to the position L3-C (stop position at the completion of folding).
Therefore, in the conveyance control means C4 of the first embodiment, when any point ai, bi moves to any one of the cutting position, the position of the third folding portion 49, and the stop position when the folding is completed, the conveyance roller 12 Is stopped.

C5: Cutter Control Unit The cutter control unit C5 includes an angle control unit C5A and a lift control unit C5B, and controls the cutters 21 and 31. The cutter control means C5 according to the first embodiment controls the inclination angle and elevation of the cutters 21 and 31 via the inclination motors M2a and M3a and the elevation motors M3a and M3b.
C5A: Angle Control Unit The angle control unit C5A controls the inclination angles α _n and β _n of the cutters 21 and 31 with respect to the thickness direction of the corrugated sheet 2 based on the outer shape of the target honeycomb core to be formed. The angle control means C5A according to the first embodiment controls the forward and reverse rotations of the respective inclination motors M2a and M3a on the basis of the inclination angles α _n and β _n calculated by the inclination angle calculation means C3, so that each cutter 21 , 31 with respect to the corrugated sheet 2 is controlled to the inclination angles α _n , β _n .

C5B: Elevating control means The elevating control means C5B is used when the coordinates a _{3m + 1} , a _{3m + 2} , b _{3m + 2} , and b _{3m + 3 at} which the incisions are made move to the incision positions In addition, each of the lifting motors M2b and M3b is controlled to raise and lower the cutters 21 and 31, thereby forming a cut.
The raising / lowering control means C5B according to the first embodiment uses the cutter 21 from the height (C / 2) of the corrugated sheet 2 so as to form a cut at a portion where the cut is formed and not completely cut the corrugated sheet 2. , 31 is moved by a distance (S = c / 2−th) drawn by the thickness (th) of the corrugated sheet 2 on the back side in the entry direction. That is, in the raising / lowering control means C5B according to the first embodiment, an amount by which the cutters 21 and 31 are moved, that is, a so-called stroke amount S (= c / 2−th) is set in advance.

Here, in FIG. 21, when the inclination angles α _n and β _n are not 90 °, the stroke amount changes according to the inclination angles α _n and β _n . In FIG. 21, the stroke amount in the case of the inclination angle α _n increases by a change ΔS with respect to the stroke amount S in the case of the inclination angle of 90 °. From FIG. 21, the change ΔS can be expressed by the following equation (42).
ΔS = (r1 + S) / {sin (π−α _n )} − (r1 + S)
= (R1 + S) (1-sin α _n ) / sin α _n (42)
The change ΔS ′ in the case of the inclination angle β _n can be similarly expressed by the following equation (43).
ΔS ′ = (r1 ′ + S) (1-sin β _n ) / sin β _n Equation (43)
Therefore, the raising / lowering control means C5B of Example 1 moves the cutters 21 and 31 by an amount obtained by adding the change ΔS to the stroke amount S in the case of 90 °.

FIG. 22 is an explanatory diagram of the bending operation of the first embodiment, FIG. 22A is an explanatory diagram of a state when the bending operation is started, and FIG. 22B is a second bent portion and a third bent from the state shown in FIG. FIG. 22C is an explanatory view of a state in which bending has further progressed from the state shown in FIG. 22B, and FIG. 22D is a state in which the first bent portion and the first bent portion are shown in FIG. 22C. FIG. 22E is an explanatory diagram of a state in which bending is further advanced from the state shown in FIG. 22D, and FIG. 22F is a third state from the state shown in FIG. 22E. It is explanatory drawing of the state by which the bending part of this moved down and bending was completed.
C6: Bending Control Unit The folding control unit C6 controls the folding device 41. The folding control means C6 according to the first embodiment controls the folding motors 51g, 52c, 53g, and 54g via the folding motor control circuit D4 to control the movement of the folding portions 43, 47, and 49.

In FIG. 22, when the point of the coordinate a _3m is conveyed and stopped at the position of the third bending portion 49, the bending control means C6 of the first embodiment, as shown in FIG. 47 and 49 are moved to positions corresponding to the points of coordinates a _{3m + 3} , b _{3m + 1} and a _3m , respectively, and the positions of the corrugated sheet 2 to be bent (a _{3m + 3} , b _{3m + 1} , a _3m ).
Here, the coordinates of each bent portions 43,47,49, _{respectively, (x a, y a)} , (x b, y b), (x c, y c) Distant, the first bending portion 43 The straight line distance between the second bent part 47 is r2, the straight line distance between the second bent part 47 and the third bent part 49 is r3, and as shown in FIG. Assuming that the position of the third bent portion 49 at is the reference (origin (0, 0)), the following equation is established.
x _a = a _{3m + 3} −a _3m Expression (44)
y _a = 0 ... Formula (45)
_{x b = b 3m + 1 -a} 3m ... formula (46)
y _b = −C / 2 Formula (47)
x _c = 0 (48)
y _c = 0 Formula (49)
r2 = {(a _{3m + 3} −b _{3m + 1} ) ² + (C / 2) ² } ^1/2 Formula (50)
r3 = {(b _{3m + 1} −a _3m ) ² + (C / 2) ² } ^1/2 Formula (51)

22A and 22B, when the bending operation is started, the position of the first bent portion 43 is fixed. That is, the motor 51g is held in a stopped state. Then, the bending control means C6 controls the second bent portion 47 to move on an arc centered on the first bent portion 43. In other words, the second bending portion 47 moves on the arc while bending by pushing the point b _{3m + 1} upward. Therefore, the bending control means C6 controls the rotation of the motors 52c and 53g that move the second bending portion 47, and the coordinates (x _b , y _b ) of the second bending portion 47 are _expressed by the following formula (52 Control to move on the arc represented by
(X _b −x _a ) ² + y _b ² = r2 ² Formula (52)
At this time, the third bent portion 49 needs to move upward so as to release the corrugated sheet 2 following the movement of the second bent portion 47. Therefore, the bending control means C6 controls the position so that the position of the third bending portion 49 becomes the position (0, y _c ) represented by the following expression (53) by controlling the motor 54g. .
y _c = y _b + (r 3 ² −x _b ² ) ^1/2 Formula (53)

22B and 22C, in the first embodiment, when the second bent portion 47 and the third bent portion 49 move to a position where y _b = y _c , the bending control means C6 causes the motors 53c, 53g, 54g to move. And the movement of the second bent portion 47 and the third bent portion 49 is stopped.
22C and 22D, the position of the third bent portion 49 is then fixed to the coordinates (0, y _c ). That is, the motor 54g is held in a stopped state. Then, the bending control means C6 controls the second bent portion 47 to move on an arc centered on the third bent portion 49. Therefore, the bending control means C6 controls the motors 52c and 53g so that the coordinates (x _b , y _b ) of the second bending portion 47 move on an arc represented by the following expression (54). .
^{_{x b 2 + (y b -y}} c) 2 = r3 2 ... Equation (54)

At this time, the first bent portion 43 is moved toward the downstream side in the conveying direction of the corrugated sheet 2 following the movement of the second bent portion 47. Accordingly, the motor 51g is driven, and the conveyance motor M1 is also driven, so that the first bent portion 43 and the corrugated sheet 2 move downstream. Therefore, the motors 51g and M1 are controlled so that the coordinates (x _a , 0) of the first bent portion 43 satisfy the formula (52), and the first bent portion 43 and the corrugated sheet 2 are located on the downstream side. Move to.
22D and 22E, when the coordinates (x _a , 0) of the first bent portion 43 move to a position where it becomes (C, 0), the motors 51g, M1, 52c, and 53g are stopped, and the first The movement of the bent portion 43 and the second bent portion 47 is stopped.

22E and 22F, next, the position of the first bent portion 43 is fixed. That is, the motor 51g is held in a stopped state. Then, the third bent portion 49 is lowered and moved to (0, u _2m −u _{2m + 2} ).
Therefore, the third bending portion 49 is moved by controlling the motor 54g. At this time, the second bent portion 47 follows the movement of the third bent portion 49. Therefore, the second bent portion 47 controls the motors 52 c and 53 g so as to move on an arc centered on the first bent portion 43. Therefore, the 2nd bending part 47 is controlled so that Formula (52) may be satisfied.

In FIG. 22F, when the bent portions 43 and 49 move to (C, 0) and (0, u _2m −u _{2m + 2} ), the folding between the points a _3m to a _{3m + 3} of the corrugated sheet 2 is performed. Complete. When the bending is completed, the bending control means C6 controls the motors 52c and 53g so that the second bending portion 47 descends and moves to a position corresponding to the lower surface of the corrugated sheet 2. At this time, the motor 54g is controlled to move the third bent portion 49 to a position that is spaced above the upper end of the bent corrugated sheet 2. That is, each bending part 43,47,49 is moved to the position which does not prevent the conveyance to the downstream side of the corrugated sheet 2. FIG.
In addition, the folding control means C6 of Example 1 cuts the corrugated sheet 2 on the upstream side of the folding device 41 as the corrugated sheet 2 is conveyed to the downstream side while the corrugated sheet 2 is folded. When the position to be formed is reached, the bending is temporarily interrupted, and after the cut is formed, the bending is resumed.

(Operation of Example 1)
In the honeycomb core manufacturing apparatus 1 of Example 1 having the above-described configuration, when the outer shape of the honeycomb core to be created is input, the positions at which the cuts are formed and the positions ai and bi to be bent are automatically calculated. In addition, the cutting inclination angles α _n and β _n are automatically calculated (first step). In the cutters 21 and 31, the cutters 21 and 31 are moved according to the calculated positions ai and bi and the inclination angles α _n and β _n to form a cut in the corrugated sheet 2 (second step). . And in the bending apparatus 41, the three bending parts 43, 47, and 49 interlock | cooperate, the corrugated sheet 2 is bent, and the honeycomb core according to the input external shape is produced (3rd process).
Therefore, in the honeycomb core manufacturing apparatus 1 of the first embodiment, the honeycomb core having an arbitrary outer shape is continuously and automatically created while the corrugated sheet 2 is conveyed from upstream to downstream. Therefore, as in the techniques described in Patent Documents 1 and 2, many devices using different devices such as a step of applying an adhesive, a step of laminating sheets, a step of hardening an adhesive, and a step of spreading a laminate. Compared to the conventional technique that requires this process, the honeycomb core manufacturing apparatus 1 of Example 1 can significantly reduce the manufacturing time of the honeycomb core and reduce the manufacturing cost. Therefore, the production of the honeycomb core can be industrially automated, and the productivity of the honeycomb core having an arbitrary outer shape can be improved.

FIG. 23 is an explanatory diagram of the honeycomb core manufacturing apparatus of the second embodiment and corresponds to FIG. 2 of the first embodiment.
Next, a second embodiment of the present invention will be described. In the description of the second embodiment, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. To do.
This embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.
In FIG. 23, the honeycomb core manufacturing apparatus 1 of Example 2 has a laser cutter 71 as an example of a notch forming apparatus instead of the two cutters 21 and 31. The laser cutter 71 of Example 2 has a base portion 72 disposed above the corrugated sheet 2.

An L stage 73 as an example of a first moving unit is supported at the lower end of the base unit 72. The L stage 73 is supported so as to be movable along the width direction of the corrugated sheet 2, that is, the L direction. A W stage 74 as an example of a second moving unit is supported at the lower end of the L stage 73. The W stage 74 is supported so as to be movable in the conveyance direction of the corrugated sheet 2, that is, in the W direction.
At the lower end of the W stage 74, a laser irradiation unit 76 as an example of a notch forming unit is supported. The laser irradiation unit 76 irradiates the corrugated sheet 2 with a laser beam 76a that forms a cut.

(Explanation of control part)
FIG. 24 is a block diagram illustrating the functions of the control unit of the computer apparatus according to the second embodiment, and corresponds to FIG. 19 according to the first embodiment.
In FIG. 24, in the apparatus main body 62 of the computer apparatus 61 of the second embodiment, instead of the notch motor drive circuits D2 and D3 in the first embodiment, to the L-stage drive circuit D2 'and the W-stage drive circuit D3'. A control signal is output.
D2 ′: L Stage Drive Circuit The L stage drive circuit D2 ′ moves the L stage 73 via a motor (not shown).
D3 ′: W Stage Drive Circuit The W stage drive circuit D3 ′ moves the W stage 74 via a motor (not shown).

(Function of the apparatus main body 62)
The apparatus main body 62 includes the following means instead of the inclination angle calculation means C3, the conveyance control means C4, and the cutter control means C5.

FIG. 25 is an explanatory diagram of the method of calculating the tilt angle of Example 2, FIG. 25A is an explanatory diagram of the state before the corrugated sheet is corrugated, FIG. 25B is a plan view of the corrugated sheet, and FIG. FIG.
C3 ′: Inclination Angle Calculation Unit The inclination angle calculation unit C3 ′ calculates an inclination angle when the laser cutter 71 forms a cut based on the outer shape data stored in the outer shape information storage unit C1. The inclination angle calculation means C3 ′ according to the second embodiment calculates the inclination angles α _n and β _n based on the coordinates ai and bi calculated from the data of the cross-section sequence ti and ui (n = 0, 1, 2). , 3, ..., 3m, 3m + 1,3m + 2, ...). In FIG. 25, the inclination angle is calculated when the coordinates are a ₁ , a ₂ , a ₄ , a ₅ ,..., A _{3m + 1} , a _{3m + 2} , ..., b ₂ , b ₃ , b ₅ , b ₆ ,..., b _{3m + 2} , b _{3m + 3,.}

In FIG. 25, as shown in FIG. 25A, the laser is viewed from above in a corrugated state (curved in a wave shape) with respect to the coordinates a _n and b _n set before the corrugated sheet 2 is bent. When irradiating the light 76a, as shown in FIG. 25B, it is necessary to irradiate the laser light 76a based on an upward projection view.
Therefore, from FIG. 25C, the following equation (35 ′) is established for the inclination angle α ′ _{3m + 1 at} the coordinate a _{3m + 1} in the projection view.
tan (π−α ′ _{3m + 1} ) = (c′sinθ) / (b _{3m + 1} −a _{3m + 1} ) Equation (35 ′)
Therefore, α ′ _{3m + 1} is calculated by the following equation (36 ′).
α ′ _{3m + 1} = tan ⁻¹ [(c′sinθ) / (a _{3m + 1} −b _{3m + 1} )] Equation (36 ′)
Similarly, α _{3m + 2} , β _{3m + 2} , and β _{3m + 3} are calculated by the following equations (37 ′) to (39 ′).
α ′ _{3m + 2} = tan ⁻¹ [(c′sinθ) / (a _{3m + 2} −b _{3m + 1} )] Equation (37 ′)
β ′ _{3m + 2} = tan ⁻¹ [(c′sinθ) / (a _{3m + 3} −b _{3m + 2} )] Equation (38 ′)
β ′ _{3m + 3} = tan ⁻¹ [(c′sinθ) / (a _{3m + 3} −b _{3m + 3} )] Equation (39 ′)

C4 ': Conveyance Control Unit The conveyance control unit C4' controls the conveyance roller 12 via the conveyance motor control circuit D1. The conveyance control unit C4 ′ according to the second embodiment controls the driving and stopping of the conveyance roller 12 based on the coordinates ai and bi calculated by the cutting position calculation unit C2.
Specifically, when the coordinates a ₀ , b ₁ , a ₃ , b ₄ ,..., A _3m , b _{3m + 1} ,... Reach the position of the laser cutter 71, the driving of the transport roller 12 is stopped. . And when the operation | work which cuts with the laser cutter 71 is completed, or when bending is completed, when conveying the corrugated sheet 2 downstream at the time of bending, the conveyance roller 12 is driven and the corrugated sheet 2 is made downstream To the side.

C5 ′: Cutter Control Unit The cutter control unit C5 ′ includes a stage control unit C5A ′ and an irradiation control unit C5B ′, and controls the laser cutter 71. The cutter control means C5 ′ of the second embodiment controls the movement of the stages 73 and 74 and the start and stop of irradiation of the laser 106a, and forms a cut in the corrugated sheet 2 by the laser 76a.

C5A ′: Stage Control Unit The stage control unit C5A ′ controls each of the stages 73 and 74 based on the notches formed to control the position where the laser beam 76a is irradiated. As an example, when the position of the coordinate b _{3m + 1} stops at the position of the laser cutter 71, the stage control means C5A ′ of the second embodiment uses FIGS. 8C and 10C based on the inclination angle α ′ _{3m + 1} . The stages 73 and 74 are controlled so that the irradiation position of the laser beam 76a passes in the order of the point BCDE in FIG. 13C. And if it moves to the point E, it will move to the point F (equivalent to the point B of an adjacent cell), and will similarly pass in order of the point BCDE in an adjacent cell. By repeating this movement, the irradiation position of the laser beam 76a is moved from one end in the width direction of the corrugated sheet 2 to the other end.

Then, when moving to the other end, the movement starts in the opposite direction of the width direction, and the irradiation of the laser beam 76a in the order of the point EGHB in FIGS. 8C, 10C, and 13C based on the inclination angle α ′ _{3m + 2} . The stages 73 and 74 are controlled so that the positions pass. Similarly to the case of scanning from one end to the other end, the stages 73 and 74 are moved (scanned) from the other end to one end.
Even when the position of the coordinate a3m is stopped at the position of the laser cutter 71, after scanning from one end to the other end based on the tilt angle β ′ _{3m + 2} , based on the tilt angle β ′ _{3m + 3} . Thus, scanning from the other end to one end is performed. In the case of the coordinate a _3m and the coordinate b _{3m + 1} , the irradiation position of the laser beam 76a is shifted in a zigzag manner with respect to the width direction as shown in FIGS. 9A, 11A, and 14A.

C5B ′: Irradiation Control Unit The irradiation control unit C5B ′ controls the start and stop of irradiation of the laser beam 76a. When the irradiation control means C5B 'of Example 2 scans from one end of the corrugated sheet 2 to the other end, the irradiation position of the laser beam 76a is set to the position of point B by the stage control means C5A'. When moving, the irradiation of the laser beam 76a is started, and when moving to the position of the point E, the irradiation of the laser beam 76a is stopped. Accordingly, the corrugated sheet 2 is irradiated with the laser beam 76a during the period in which the stages 73 and 74 pass through the point BCDE, and the cut 102 is formed. When scanning from the other end of the corrugated sheet 2 to one end, when the irradiation position of the laser beam 76a is moved to the position of the point E by the stage control means C5A ', the irradiation of the laser beam 76a is started. Then, when moving to the position of the point B, the irradiation of the laser beam 76a is stopped. Accordingly, the corrugated sheet 2 is irradiated with the laser beam 76a during the period in which the stages 73 and 74 pass through the point EGHB, and the cut 102 is formed.

(Operation of Example 2)
In the honeycomb core manufacturing apparatus 1 of Example 2 having the above-described configuration, one laser cutter 71 can irradiate the laser beam 76 a from above the corrugated sheet 2 to form the cut 102. Therefore, it is not necessary to arrange the cutters 21 and 31 on the upper and lower sides of the corrugated sheet 2.
Moreover, in the laser cutter 71, the part which does not form the notch 102 by irradiation of the laser beam 76a and a stop can be formed easily. In other words, in the configuration of the cutters 21 and 31 according to the first embodiment, if the stroke amount is calculated according to the inclination angle and is not controlled with high accuracy, there is a risk that the cutters 21 and 31 may cut the portions where the notches 102 are not formed. However, the fear of the laser cutter 71 is reduced.

  The laser cutter 71 of Example 2 scans in the width direction of the corrugated sheet 2 with one laser beam 76a to form a row of cuts 102. However, the present invention is not limited to this, and laser irradiation is performed. A plurality of portions 76 are arranged in the width direction at intervals of one cell, and a plurality of laser beams 76a are formed at the same time so that the stages 73 and 74 are moved by one cell. It is also possible to adopt a configuration in which the notches 102 for one row are formed.

FIG. 26 is an explanatory view of a joining apparatus of the honeycomb core manufacturing apparatus of the third embodiment.
FIG. 27 is an explanatory diagram of the joining device of the third embodiment, FIG. 27A is a diagram corresponding to FIG. 22F of the first embodiment, and FIG. 27B is an explanatory diagram of a state in which the joining device has moved from the state shown in FIG. FIG. 27C is an explanatory diagram of a state in which the joining device is operated and performing joining from the state shown in FIG. 27B, and FIG. 27D is an explanatory diagram of a state in which the joining device has moved to the standby position.
Next, a third embodiment of the present invention will be described. In the description of the third embodiment, the same reference numerals are given to the components corresponding to the components of the first embodiment, and the detailed description thereof will be omitted. To do.
This embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.
In FIG. 26, in the honeycomb core manufacturing apparatus 1 of Example 3, a welding apparatus 81 as an example of a joining apparatus is disposed adjacent to the downstream side of the bending apparatus 41.
The welding apparatus 81 of Example 1 has the 1st welding apparatus 82 arrange | positioned above the corrugated sheet 2 after bending.

The first welding device 82 has a fixed base portion 83. A slider portion 84 is supported on the base portion 83 so as to be movable in the vertical direction. The slider portion 84 is supported by a drive system (not shown) so as to be movable between an upper standby position shown in FIGS. 27A and 27D and a lower joining position shown in FIGS. 27B and 27C.
A plurality of spot welds 86 are supported on the lower end of the slider part 84 at predetermined intervals. The spot welds 86 are arranged corresponding to the surface ABIJ (surface ABI′J ′) of each cell in FIGS. 6, 8B, 10B, 12B, and 13B.
The spot welded portion 86 includes a first electrode portion 86a and a second electrode portion 86b, and the second electrode portion 86b is rotatably supported by the first electrode portion 86a around the shaft portion 87. Has been. Electric power for spot welding is supplied to each electrode part 86a, 86b via a power supply cable (not shown).

The shaft portion 87 of the third embodiment penetrates the plurality of spot welded portions 86, and a gear 87 a is supported on one end of the shaft portion 87. The gear 87 a meshes with the drive gear 88 a of the gear box 88 supported by the slider portion 84. Therefore, the second electrode portion 86b approaches and separates from the first electrode portion 86a in accordance with transmission of forward / reverse rotation from the gear box 88.
The welding apparatus 81 according to the first embodiment includes a second welding apparatus 82 ′ disposed below the corrugated sheet 2. Compared with the first welding device 82, the second welding device 82 'is different from the first welding device 82 in that the spot welding device 86' has a surface CDLK (adjacent cell) of each cell in FIGS. 6, 8B, 10B, 12B, and 13B. The other portions are configured in the same manner except that they are arranged corresponding to the plane HGOP), and the corresponding portions are denoted by reference numerals with “′” and detailed description thereof is omitted.

(Explanation of control part)
FIG. 28 is a block diagram illustrating the functions of the control unit of the computer apparatus according to the third embodiment, and corresponds to FIG. 19 according to the first embodiment.
In FIG. 28, the apparatus main body 62 of the computer apparatus 61 of the third embodiment outputs a control signal to the welding apparatus 81 in addition to the control elements in the first embodiment.
D5: Driving circuit of the first welding apparatus The driving circuit D5 of the first welding apparatus moves the slider portion 84 and moves the electrode portions 86a and 86b closer to and away from each other via a motor and a power supply circuit (not shown). Or feeding power to the electrode portions 86a and 86b.
D6: Drive circuit of the second welding apparatus The drive circuit D6 of the second welding apparatus moves the slider part 84 'or approaches the electrode parts 86a' and 86b 'via a motor or a power supply circuit (not shown). The electrode portions 86a 'and 86b' are powered.

(Function of the apparatus main body 62)
The apparatus main body 62 includes a joining control unit C7 in addition to the units of the first embodiment.
C7: Joining Control Unit The joining control unit C7 controls the welding device 81 to join the folded corrugated sheet 2. When the bending by the bending device 41 is completed, the joining control means C7 of the third embodiment controls the slider portions 84 and 84 'to move from the standby position shown in FIG. 27A to the joining position shown in FIG. 27B. Next, by controlling the motor boxes 88 and 88 ', as shown in FIG. 27C, the surfaces ABIJ and ABI'J' are sandwiched between the electrode portions 86a and 86b, and the surfaces are separated by the electrode portions 86a 'and 86b'. The CDLK and the adjacent cell surface HGOP are sandwiched. Next, power is supplied to the electrode portions 86a, 86b, 86a ′, 86b ′, and spot welding is performed. Next, the motor boxes 88 and 88 'are controlled so that the second electrode portions 86b and 86b' are separated from the first electrode portions 86a and 86a ', and the slider portions 84 and 84' are controlled. Return to the standby position shown in.

(Operation of Example 3)
In the honeycomb core manufacturing apparatus of Example 3 having the above-described configuration, spot welding can be performed after folding, and it is not necessary to hold the honeycomb core 106 so as not to spread or to apply and dry an adhesive later. . Therefore, it is easy to use the prepared honeycomb core 106 promptly.
The welding device 81 can also be applied to the configuration of the second embodiment. Moreover, the number of spot welding is not limited to one place, For example, it is also possible to set the position where the sliders 84 and 84 ′ are stopped to a plurality of places and perform spot welding at a plurality of places.

FIG. 29 is an explanatory diagram of a honeycomb core of Example 4, FIG. 29A is an explanatory diagram of a corrugated sheet before folding, and FIG. 29B is an explanatory diagram of a honeycomb core after folding.
Next, a description will be given of a fourth embodiment of the present invention. In the description of the fourth embodiment, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. To do.
This embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.

29, in the honeycomb core manufacturing apparatus 1 of Example 4, the corrugated sheets of Examples 1 to 2 in which the two inclined surface portions 2b and 2d are inclined outward in the width direction of the corrugated sheet 2 as they go downward. Unlike FIG. 2, as shown in FIG. 29A, a corrugated sheet 2 ′ that is inclined inward in the width direction of the corrugated sheet 2 as the two inclined surface portions 2b ′ and 2d ′ go downward is used.
Therefore, when the corrugated sheet 2 is bent, as shown in FIG. 29B, a honeycomb core in which cells are formed of a thread-wound hexagon, that is, a so-called butterfly type or re-entrant type honeycomb core 106 'is formed.

(Operation of Example 4)
30 is an explanatory diagram when a force is applied to the honeycomb core, FIG. 30A is an explanatory diagram for the honeycomb core of Example 1, and FIG. 30B is an explanatory diagram of the honeycomb core of Example 4.
In the honeycomb core manufacturing apparatus 1 of Example 4 having the above-described configuration, a butterfly-type honeycomb core 106 ′ as shown in FIG. 29 can be produced.
Here, as shown in FIG. 30, when a force F1 that causes the honeycomb cores 106 and 106 'to bend downward in the front and rear sides of the honeycomb cores 106 and 106' is applied, The left and right sides are deformed in a direction warping upward. On the other hand, in the honeycomb core 106 ′ of the fourth embodiment, the left and right sides are deformed downward in the same manner as the bending force F 1. Therefore, if it is necessary to bend the cores 106 and 106 ′ by fine adjustment or the like after the honeycomb cores 106 and 106 ′ are formed, the honeycomb core 106 of the first embodiment has a direction opposite to the direction in which the honeycomb cores 106 and 106 ′ are desired to be bent. Therefore, fine adjustment may be difficult. On the other hand, in the honeycomb core 106 ′ of the fourth embodiment that is deformed in the same direction as the bending force F1, fine adjustment can be easily performed. In particular, since the honeycomb core 106 'of Example 4 is deformed in the same direction as the bending force F1, even when the honeycomb core 106' is arranged along the spherical surface, it can be easily handled.

FIG. 31 is an explanatory view of a modified example of Example 4, FIG. 31A is an explanatory view of a corrugated sheet before folding, and FIG. 31B is an explanatory view of a honeycomb core after bending.
Like corrugated sheets 2 and 2 'shown in Examples 1 to 4, it is not limited to honeycomb cores 106 and 106' in which a single cell is repeated by repeating the same trapezoid, as shown in FIG. It is also possible to employ honeycomb cores 106 "having different cells with corrugated sheets 2" having different polygonal repeats. As an example, in the honeycomb core 106 ″ of FIG. 31, a rectangular cell, a convex hexagonal cell of Examples 1 to 3, and a butterfly cell of Example 4 are combined. The shape, number, order of arrangement, etc. are not limited to the form shown in FIG. 31, but can be changed according to the design.

(Example of change)
As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various change is performed within the range of the summary of this invention described in the claim. It is possible. Modification examples (H01) to (H010) of the present invention are exemplified below.
(H01) In the above embodiment, the cutters 21 and 31 are exemplified by a flat plate-like configuration extending in the width direction of the corrugated sheet 2, but are not limited thereto, and the cutters 21 and 31 are arranged only at the portions to be cut. It is possible to have a configuration as described above. For example, any form capable of forming a notch such as a comb-tooth shape or a saw-tooth shape can be employed.

(H02) In the said Example, although the cutter 21 and 31 was moved to the thickness direction with respect to the corrugated sheet 2, the structure which forms a notch was illustrated, it is not limited to this, For example, the corrugated sheet 2 It is also possible to adopt a configuration that reciprocates in the width direction. In addition, the cutters 21 and 31 can be configured to be movable in the conveying direction and the width direction of the corrugated sheet 2, and cuts at arbitrary positions and arbitrary inclination angles can be formed.

(H03) In the said Example, the structure which rotates the cutters 21 and 31 and the structure to raise / lower are not limited to the illustrated structure, Arbitrary structures which can adjust the inclination angle of the cutters 21 and 31, and the cutters 21 and 31 Any configuration that can move up and down can be employed. That is, the configuration is not limited to the combination of the motor and the gear, and for example, an arbitrary configuration such as a configuration using air pressure or hydraulic pressure or a configuration using a belt and a pulley can be used. In addition, regarding the configuration for moving the bent portions 43, 47, 49, any configuration can be similarly adopted.

(H04) In the above-described embodiment, the configuration using the corrugated sheet 2 in which the waveform is formed in advance has been exemplified. It is also possible to install a device. For example, a press machine for processing the corrugated sheet 2 is installed on the upstream side, a bending device for bending a flat sheet from the width direction is installed, or a roll (corrugation roll) formed in a wave shape along the width direction ) And any other method can be employed, such as installing an extrusion molding device.

(H05) In the above embodiment, the prepared honeycomb core does not necessarily have to be bonded with an adhesive or the like. For example, an adhesive is applied to the corrugated sheet 2 between the second cutter 31 and the bending device 41. It is also possible to arrange the apparatus so that it is bonded with an adhesive when bent. In addition, when the adhesive is applied to the second bent portion 47 and the third bent portion 49 and the folding portions 47 and 49 move up and down after the folding is completed, the bent portions 47 and 47 It is also possible to adopt a configuration in which the adhesive is applied to the surface of the corrugated sheet 2 with which 49 is in contact and retracted.

(H06) In the above-described embodiment, the configuration in which the corrugated sheet 2 is positively bent by moving the three bending portions 43, 47, and 49 as the bending device 41 is exemplified, but the present invention is not limited thereto. Arbitrary changes are possible, such as folding the corrugated sheet 2 by pushing the corrugated sheet 2 in the conveying roller 12 conveyance after applying only the direction of the fold line (mountain fold or valley fold) at the part. .
(H07) In the above-described embodiment, the configuration in which the process of forming the cut and the process of performing the bending are continuously performed by one transport device 11 is illustrated, but the present invention is not limited thereto. For example, it is possible to increase the distance between the cutters 21 and 31 and the bending device 41 and further dispose a conveying device between them or connect them with a belt conveyor or the like.

(H08) In the above-described embodiment, the configuration in which the step of forming the cut and the step of bending are performed on one continuous corrugated sheet 2 is not limited thereto. For example, a configuration is adopted in which the corrugated sheet 2 having been formed with the cut for one honeycomb core is cut by the cutter 21 and the one honeycomb core cut by the bending device 41 is bent and completed. Is also possible. That is, the cutters 21 and 31 and the folding device 41 are separate and independent devices, and the corrugated sheet 2 with the cuts formed by the cutters 21 and 31 is conveyed to the folding device 41 by a belt conveyor or manually and folded. It is also possible to adopt a configuration to perform.
(H09) In the above-described embodiment, the configuration in which the laser cutter 71 forms the notches 102 for one row in the width direction is illustrated, but the present invention is not limited to this, and the notches 102 for a plurality of rows are formed simultaneously. Is also possible. In addition, it is also possible to widen the movable range of the laser cutter 71 and form two or more rows of cuts 102 while the corrugated sheet 2 is stopped.

(H010) In the above-described embodiment, the welding apparatus 81 that performs spot welding is illustrated as an example of the joining apparatus. However, the present invention is not limited to this, and an arbitrary configuration capable of joining is also possible. For example, any joining method such as using a stapler or caulking can be adopted.

1 ... Honeycomb core manufacturing equipment,
2 ... base material,
11 ... Conveying device,
21 ... 1st notch formation apparatus,
21 + 31 ... notch forming device,
31 ... Second notch forming device,
41 ... bending device,
102 ... notches,
C5A ... control means,
α _n , β _n ... inclination angle.

Claims (3)

A transport device for transporting the substrate on which the irregularities are formed in the thickness direction in a preset transport direction;
A notch forming device for forming a notch from one and the other in the thickness direction of the base material with respect to the base material,
A bending device that bends the base material in the thickness direction according to the notch formed by the notch forming device;
Control means for controlling the notch forming device based on the shape and position of the notch according to the outer shape of the target honeycomb core to be formed;
An apparatus for manufacturing a honeycomb core, comprising: A first notch forming device that is supported to be tiltable with respect to the thickness direction of the base material and forms a notch from one side of the base material in the thickness direction of the base material; and in the thickness direction of the base material. A second notch forming device that is supported so as to be tiltable and forms a notch from the other of the base material in the thickness direction of the base material,
The honeycomb core manufacturing apparatus according to claim 1, further comprising: A first step of setting the shape and position of the cut formed in the base material with respect to the thickness direction of the base material based on the outer shape of the target honeycomb core to be formed;
Based on the shape and position of the notch set in the first step with respect to the base material that is transported in the transport direction set in advance and has the irregularities formed in the thickness direction. A second step of forming a cut from the thickness direction of the substrate;
A third step of bending the base material from the thickness direction of the base material with respect to the base material in which the cut is formed;
The manufacturing method of the honeycomb core characterized by performing these.