JPH0780268B2 - Cardboard folding method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sheet-like material, for example,
The present invention relates to a corrugated board crease imparting method used for packaging photographic paper and the like.

[0002]

2. Description of the Related Art FIG. 25 is a perspective view of a conventional cardboard 500. The corrugated board 500 is provided with parallel folds 501 in a conveyance process (not shown) to divide the corrugated board into a base piece 502 and a folded piece 503.

After the operator manually presses a long jig (not shown) along the fold line 501 on the upper surface of the base piece 502 to prevent the base piece 502 from moving in the thickness direction. ,
The folded piece 503 is gripped by a hand and folded upward as indicated by an arrow, and a crease 501 is formed.

[0004]

Since the above-mentioned conventional folding habit imparting work is manually performed after the completion of the transportation of the corrugated board, the working man-hour and the working time are increased. As a result, there is a problem that the work efficiency is lowered and the manufacturing cost of the corrugated board 9 is increased.

An object of the present invention is to provide a corrugated board crease imparting method which eliminates the above problems.

[0006]

In order to solve the above-mentioned problems, a corrugated board crease imparting method of the present invention is a corrugated board having a base piece and a folded piece connected through a plurality of folds provided in proximity to each other. And the outer folds of the plurality of folds are aligned with the linearly formed first guide edge of the first jig provided along the transport direction of the transporting means. At the same time, the folded piece is brought into contact with the first guide member provided on the side of the conveying means, and the folded piece is raised with the outer fold of the plurality of folds as a fulcrum to give a first crease. After that, in a state where the corrugated cardboard is raised, a second jig located inside the plurality of folds inside the first jig provided along the transport direction of the transport means. Aligned with the second guide edge formed in a straight line While carrying, the corrugated cardboard located between the inner fold and the outer fold is brought into contact with a second guide member provided on the side of the carrying means to form the inner fold and the outer fold. The corrugated board located between the two is folded up with the inner fold of the plurality of folds as a fulcrum to give a second crease.

[0007]

[0008]

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of the overall configuration of the device 1. The device 1 has an upstream transport unit 2 and a downstream transport unit 3, and between the upstream transport unit 2 and the downstream transport unit 3, the fold-giving unit 4 and the intermediate transport unit 5 are arranged along the upstream side to the downstream side. , Crease imparting section 6
Are provided in sequence.

The upstream transport unit 2 has a transport roller 7, a transport belt 8 and the like, and separates the stacked corrugated boards 9 one by one from the lower one and transports them downstream.

The crease imparting section 4 has a pair of upper and lower conveying rolls 10 and 11 arranged vertically, and as shown in FIG. 2, the axes of the upper and lower conveying rolls 10 and 11 (not shown). Are parallel to each other, and by the rotation thereof, the corrugated cardboard 9 is nipped and conveyed in the direction of arrow D which is substantially orthogonal to the axis in the horizontal plane. Further, a predetermined gap is formed between the upper transport roll 10 and the lower transport roll 11.

Two arcuate substrates 12 are fixed at different positions in the axial direction of the upper transport roll 10. Since the left and right sides of the two substrates 12 in the transport direction D are symmetrical, the right side will be described.

As shown in FIG. 3, a cutter 12 having a U-shaped plane is provided on the upstream side of the substrate 12 in the rotation direction B at a position near the center of the upper carrier roll 10, On the downstream side in the rotation direction B of the upper transport roll 10,
As shown in FIG. 4, a cutter 15 having a U-shaped plan is provided.

The cutter 13 has parallel portions 13A and 13B in the circumferential direction.
And a connecting portion 13C that connects the downstream sides of the parallel portions 13A and B.
Have and. The cutter 15 has parallel portions 15A, B in the circumferential direction.
And a connecting portion 15C that connects the upstream sides of the parallel portions 15A and B.
Have and.

Between the cutters 13 and 15, two parallel pressure ribs 14 are provided along the circumferential direction.
The distance between the parallel portions 13A and 13B and the parallel portions 15A and 15B and the distance between the pressure ribs 14 are set to be substantially the same.

FIG. 5A shows the upper conveyance roll 10 with the cutter 1.
It is the figure cut | disconnected laterally at the position of 3. Cutter 13, 1
The height of 5 is set to be slightly higher than the height of the pressure rib 14. A mat-shaped cushion 16 is provided inside the cutters 13 and 15.

As shown in FIGS. 3 and 4, a belt-shaped cushion 17 is fixed to the substrate 12 at a position near the outer side of the upper transport roll 10 along the circumferential direction.

Further, a plurality of needles 18 are provided in a line along the circumferential direction at approximately the center in the width direction of the cushion 17. FIG. 5B is a view in which the upper transport roll 10 is laterally cut at the cushion 17 portion. The lower end of the needle 18 is the substrate 12
And the upper end of the needle 18, that is, the tip is located on the surface side of the cushion 17.

The lengths of the needles 18 from the substrate 12 are all set to be substantially the same, and the length is set to be substantially the same as the thickness of the cushion 17 and smaller than the thickness of the corrugated board 9.

A belt-shaped cushion 19 is fixed along the circumferential direction between the cushion 17 and the pressure rib 14 on the substrate 12, and the base 12 is located outside the cushion 17. Has a plurality of cushions 20 fixed at predetermined intervals along the circumferential direction.

FIGS. 6 and 7 show the device 1 of FIG.
FIG. 3 is a front cross-sectional view in which a portion is enlarged near the center thereof. The intermediate transport unit 5 includes a pair of transport rollers 21 and a transport belt 22.
And so on.

The crease imparting section 6 has a frame 23.
At the same height of the upstream end and the downstream end of the frame 23 in the transport direction D, a pair of transport rollers 24, 25 rotating in the arrow direction.
Is provided. An endless conveyor belt (conveying means) 26 is wound around the conveyor rollers 24 and 25, and the upper surface of the conveyor belt 26 is substantially horizontal. A large conveying roller 46 is provided above the conveying roller 24.

Inside the conveyor belt 26, a plurality of push-up rollers 27 are provided at substantially the same height along the upstream side and the downstream side at predetermined intervals.

FIG. 8 is a perspective view of the vicinity of the push-up roller 27. The frame 23 is provided with a shaft 28 protruding substantially horizontally, and a swing lever 29 holding a push-up roller 27 is attached to the shaft 28. The swing lever 29 is guided upward in the drawing by an elastic force of a spring or the like (not shown) and is pressed against the inner peripheral surface of the conveyor belt 26.

Above the conveyor belt 26, which is the frame 23, a plate-shaped first jig 30 and a second jig 31 which are divided into two parts on the upstream side and the downstream side in the conveying direction D are provided substantially horizontally. .

FIG. 9 is a plan view of the vicinity of the first jig 30 and the second jig 31. The first jig 30 and the second jig 31 are parallel to the transport direction D, that is, the first guide edge 3 formed in a straight line shape.
2, having a second guide edge 33.

The lengths of the first guide edge 32 and the second guide edge 33 in the direction E which is substantially orthogonal to the carrying direction D from the center line (not shown) of the frame 23 are the first guide edge 32 and the second guide edge 32. The dimension L is set to be longer than the second guide edge 33. That is, the second jig 31 is located inward of the first jig 30. The dimension L is set to be substantially the same as the distance between the pressure ribs 14.

As shown in FIGS. 6 and 7, a plurality of small rollers (conveying means) 34 are provided along the conveying direction D above the first jig 30 and the second jig 31 in the frame 23. . The arrangement position of the plurality of small rollers 34 corresponds to the arrangement position of the push-up roller 27.

Holes 35 and 36 are formed through the first jig 30 and the second jig 31 in the thickness direction.
The lower portion of the small roller 34 is inserted into the inside of the rollers 5, 5, and the small roller 34 is in contact with the upper surface of the conveyor belt 26.

As shown in FIGS. 6 and 7, two guide rods (first guide members) 37 and 38 are provided along the conveying direction D on the side of the conveying belt 26. The guide rod 37 has a length corresponding to the first jig 30, and the guide rod 37 is provided with an inclination that becomes higher toward the downstream side in the transport direction D.

Therefore, the upstream end of the guide rod 37 is located below the transport roller 24, and the downstream end of the guide rod 37 is located above the upper surface of the transport belt 26.

The other guide rod 38 is the first jig 30,
The guide rod 38 has a length corresponding to the second jig 31 and has an upstream half 39 on the upstream side and a downstream half 40 on the downstream side.
The upstream half portion 39 has an inclination that becomes higher toward the downstream side in the transport direction D, and the downstream half portion 40 is substantially horizontal.

The upstream end of the upstream half 39 is located near the transport roller 24, and the downstream end of the upstream half 39 is located at substantially the same height as the downstream end of the guide rod 27.

The guide rod 38 is provided between the guide rod 37 and the conveyor belt 26. The guide rods 37 and 38 are both held by the column 41 with respect to the frame 23.

A guide bar 38 which is lateral to the conveyor belt 26
A plurality of guide rollers (second guide members) 42 are provided at predetermined intervals along the conveyance direction D below. The guide roller 42 is rotatably attached to a vertical shaft 44 provided on the projecting portion 43 on the frame 23 side.

A guide surface 45 is provided on the outer circumference of the guide roller 42. The guide surface 45 of each guide roller 42 is
The inclination angle is different. That is, the upstream guide roller 42
The guide surface 45 has a gentle slope, and the slope of the guide surface 45 is gradually steep as it goes downstream.

The downstream side transport unit 3 has a transport roller 46, a transport belt 47 and the like.

6 to 9 have been described on the right side of the frame 23 in the carrying direction D, the carrying direction D
A structure similar to the above is symmetrically provided on the left side of.

Next, the operation of the above embodiment will be described.

The corrugated board 9 laminated on the upstream conveying section 2 is
As shown in FIG. 10, fold lines 50 and 51 are formed in advance in a direction substantially orthogonal to the transport direction D.

As shown in FIG. 11, the corrugated board 9 is formed by sandwiching a corrugated core 52 between two liners 53, and the bending rigidity in the direction along the folds 50 and 51 is the same as that in the carrying direction D. Higher than bending rigidity.

Then, the corrugated board 9 linearly enters the gap between the upper transport roll 10 and the lower transport roll 11 with both sides thereof aligned with the transport direction D. Then, as shown in FIG. 3, the cutter 13 moves the side 58 of the corrugated board 9 in the conveyance direction D.
The side is cut to form notches 54 and 55 having the width as shown in FIG.

Thereafter, the pressure ribs 14 are pressed against the corrugated cardboard 9 as the upper transport roll 10 and the lower transport roll 11 are rotated, so that the corrugated cardboard 9 is partially recessed, and the notches 54,
Corresponding to 55, two folds 56 on the left and right of the cardboard 9,
57 are formed respectively.

On the downstream side 59 of the corrugated board 9,
Notches 54 and 55 are formed by the cutter 15. Thus, the cardboard 9 is formed with the base piece 9A and the bent piece 9B connected to the base piece 9A via the fold lines 56 and 57. The fold line 56 and the fold line 57 are provided close to each other, and 56 is an outer fold line and 57 is an inner fold line.

When the corrugated board 9 has entered the gap between the upper transport roll 10 and the lower transport roll 11, the cushion 17
Is pressed against the corrugated board 9, and as shown in FIG. 13, the cushion 17 is elastically deformed (crushed) gradually from the upstream side in the rotation direction of the transport roll 10 along the circumferential direction.

Then, the needles 18 are successively exposed from the surface of the cushion 17 and pierce the corrugated board 9 one by one. Therefore, the cushion 17 can absorb the bending load applied to the needle 18 when the needle 18 is stuck, and the needle 18 can be prevented from being broken.

Further, if the parallel accuracy of the upper transport roll 10 and the lower transport roll 11 is poor, or the folds 56, 57 are formed.
It is assumed that the rigidity of the part is different between the left and right in the carrying direction D, and the left and right carrying force of the pressing rib 14 with respect to the corrugated board 9 is different.

In particular, as shown in FIG. 11, the core 5 of the corrugated board 9
In the curved portion in which 2 is in contact with the liner 53 on the lower surface side, since the bending rigidity against the pressure applied from above is weak, the corrugated board 9 is likely to be deformed irregularly in the longitudinal direction of the liner 53, and the above-mentioned conveyance force Differences are likely to occur.

However, in this embodiment, the corrugated board 9 is prevented from moving in the direction deviating from the transport direction D by the locking force of the two rows of the pierced needles 18, so that the transport accuracy is improved.

Therefore, the corrugated board 9 is accurately conveyed, and the linear folds 56 and 57 can be formed.

In this embodiment, two folds are provided on the left and right sides of the corrugated board 9, but one or three or more folds can be formed by changing the number of pressure ribs.

Further, the substrate 12 and the needle 18 are placed on the upper transport roll 1
Although it is provided on the 0 side, it may be provided on the lower transport roll 11 side.

Thereafter, the corrugated board 9 passes between the conveyor belt 26 and the large conveyor roller 46 by the intermediate conveyor section 5,
It enters between the conveyor belt 26 and the first jig 30.

The corrugated board 9 is conveyed to the downstream side along the surface direction by the conveyor belt 26 and the conveyor rollers 34.

During this conveyance, the first guide edge 3 of the first jig 30.
2 contacts the inside of the fold line 56 on the upper surface of the base piece 9A of the corrugated board 9 as shown in FIG. That is, the outer fold line 56 of the plurality of fold lines 56 and 57 is conveyed in alignment with the linearly formed first guide edge 32 of the first jig 30 provided along the conveying direction of the conveying means. Then, the pushing-up force of the push-up roller 27 is applied to the lower surface of the base piece 9A via the conveyor belt 26, and the base piece 9A is sandwiched by the small roller 34 and the conveyor belt 26 to prevent movement in the thickness direction. To be done.

When the leading end of the corrugated board 9 in the transport direction D reaches near the intersection of the upper surface of the transport belt 26 and the guide rod 39 as seen from the front as shown in FIG. Guided upwards by 39.

As a result, the folded piece 9B of the corrugated cardboard 9 being conveyed.
Is automatically folded inward as shown by an arrow with the fold line 56 as a fulcrum by the conveying force of the conveyor belt 26 and the conveyor roller 34.

Further, the guide force applied from the guide rod 39 is strengthened as it goes downstream in the transport direction D as shown in FIGS. One habit is added.

Further, when the corrugated board 9 reaches the downstream side, FIG.
As in 0, the second guide edge 33 of the second jig 31 contacts the inside of the fold line 57 on the upper surface of the base piece 9A. That is, the inner fold 57 of the plurality of folds 56, 57 is formed in a linear shape of the second jig 31 located inward of the first jig 30 provided along the carrying direction of the carrying means. Guide edge 33
Transport according to. The push-up force of the push-up roller 27 is still applied to the lower surface of the base piece 9A.

During the transportation, the folded piece 9B of the corrugated board 9 is raised to the center side by the guide rod 40, and
The lower portion of the folded piece 9B is guided to the base piece 9A side by the guide surface 45 of the guide roller 42 as shown in FIGS.

That is, the corrugated cardboard 9 located between the inner fold 57 and the outer fold 56 is brought into contact with the guide roller 42 provided on the side of the conveying means so that the inner fold 57 and the outer fold 56 are separated from each other. The corrugated cardboard 9 located between them is raised with the inner fold line 57 of the plurality of fold lines 56, 57 as a fulcrum to give a second crease.

After the folding operation is continued up to the state shown in FIG. 23, when the corrugated board 9 reaches the downstream conveying section 3, the folding piece 9B is tilted outward by its own weight with the folds 56 and 57 as fulcrums.

In the corrugated board 9 having the creases thus formed, the portion 60 bent along the folds 50 and 51 is bonded to the base pieces 9A and 9B as shown in FIG. After accommodating a sheet-like material such as photographic paper, the folded piece 9B is folded at the fold lines 56 and 57, and the folded portion 6 is formed.
It will adhere to 0.

As described above, in this embodiment, the corrugated board 9 can be automatically given a crease along the creases 56 and 57 while the corrugated board 9 is being conveyed. Therefore, the work man-hour,
The work time can be reduced, the work efficiency can be improved, and the corrugated board manufacturing cost can be reduced.

Of course, when the number of the folds 56 and 57 is increased or decreased, the guide member is increased or decreased according to the number.

[0067]

According to the corrugated board crease imparting method of the present invention, a corrugated board having a base piece and a folded piece connected via a plurality of folds provided in proximity to each other is sandwiched by a conveying means, and the plurality of corrugated boards are provided. The outer folds of the folds are conveyed in alignment with the linearly formed first guide edge of the first jig provided along the conveying direction of the conveying means, and the first fold is provided on the side of the conveying means. In a state in which the folding piece is brought into contact with one guide member, the folding piece is raised with the outer fold of the plurality of folds as a fulcrum to give a first crease, and then the cardboard is raised. , Aligning an inner fold of the plurality of folds with a linearly formed second guide edge of a second jig located inward of the first jig provided along the carrying direction of the carrying means. And transport
Positioned between the inner fold and the outer fold by contacting the corrugated cardboard located between the inner fold and the outer fold with a second guide member provided on the side of the conveying means. A second crease is given by raising the corrugated cardboard with the inner crease of the plurality of folds as a fulcrum, and the first crease is attached to the outer fold, and then the second crease is added to the inner fold. Since the creases and the creases are sequentially applied from the outer side to the inner side, the creases can be smoothly imparted while being sandwiched by the conveying means. Moreover, when the first crease is applied, the outer fold line is first guided. Since it is aligned with the edge, it is possible to reliably apply the first crease.Furthermore, when applying the second crease, align the inner fold line with the second guide edge while the folded piece is raised. Inside the second guide member Ri eyes and for the cardboard located between the outer folds are brought into contact with the second guide member,
There is an effect that the second crease can be surely added.

Therefore, the work man-hours and work time can be reduced,
The work efficiency can be improved and the manufacturing cost of corrugated board can be reduced.

According to the second aspect of the invention, when the conveying means sandwiches and conveys the corrugated board, and the guide member is brought into contact with the folded piece of corrugated board to be conveyed, the folded piece stands up with the crease as a fulcrum and automatically. Add creases to the folds.

Therefore, the work man-hours and work time can be reduced,
The work efficiency can be improved and the manufacturing cost of corrugated board can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an overall configuration of a corrugated board crease imparting apparatus for carrying out a corrugated board crease imparting method of the present invention.

FIG. 2 is a perspective view of a crease imparting portion of FIG.

FIG. 3 is a partial perspective view showing a state where a corrugated board is being conveyed by the crease imparting section in FIG.

FIG. 4 is a partial perspective view showing a state where a corrugated board is being conveyed by the crease imparting section in FIG.

5A is a cross-sectional view of a cutter portion of the upper conveyance roller of FIG. 2, and FIG. 5B is a cross-sectional view of a cushion portion of the upper conveyance roller of FIG.

6 is an enlarged front view of the upstream half of the entire apparatus of FIG.

7 is an enlarged front view of the downstream half of the entire apparatus of FIG.

FIG. 8 is a perspective view of the vicinity of a push-up roller used in the folding-curve imparting unit of the present embodiment.

FIG. 9 is a plan view of the vicinity of a first jig and a second jig used in this example.

FIG. 10 is a perspective view of a corrugated board before a crease is formed by a crease forming section in the present embodiment.

11 is a partial perspective view of the corrugated board of FIG.

FIG. 12 is a perspective view of the corrugated board after the creases are formed by the crease forming section in the present embodiment.

FIG. 13 is an enlarged front cross-sectional view showing a state in which the corrugated board is prevented from moving at the fold-providing part in the present embodiment.

FIG. 14 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 15 is a front view of the process of folding the corrugated board in the present embodiment.

FIG. 16 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 17 is a front view of the process of folding the corrugated board in the present embodiment.

FIG. 18 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 19 is a perspective view of a process of folding a corrugated board in the present embodiment.

FIG. 20 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 21 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 22 is a side sectional view of the process of folding the corrugated board in the present embodiment.

FIG. 23 is a front view of the process of folding the corrugated board in the present embodiment.

FIG. 24 is a perspective view showing a state where the corrugated board manufactured in this example is folded and adhered.

FIG. 25 is a perspective view showing a conventional corrugated board folding operation.

[Explanation of symbols]

 9 Corrugated Cardboard 9A Base Piece 9B Folded Piece 26 Conveyor Belt (Conveying Means) 27 Pushing Roller (Clamping Member) 30 First Jig 31 Second Jig 34 Small Roller 37, 38 Guide Rod (First Guide Member) 56, 57 fold

Claims (1)

[Claims] 1. A corrugated cardboard having a base piece and a folded piece connected via a plurality of folds provided in close proximity to each other is sandwiched by a carrying means, and an outer fold of the plurality of folds is carried by the carrying means. Of the first jig provided along the transport direction of the first jig along with the linearly formed first guide edge, and the folded piece is brought into contact with the first guide member provided on the side of the carrying means. The first folding habit by giving rise to the folding piece with the outer fold of the plurality of folds as a fulcrum, and then, with the cardboard raised, the inner fold of the plurality of folds. Is carried along with the linearly formed second guide edge of the second jig located inward of the first jig provided along the carrying direction of the carrying means, and laterally of the carrying means. The second guide member provided on the The corrugated cardboard located between the outer fold and the outer fold and abut the corrugated cardboard located between the inner fold and the outer fold with the inner fold of the plurality of folds as a fulcrum. A method for imparting corrugated creases to cardboard, characterized in that a second crease is imparted.